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Projects:2016s2-215 Bhutan Power System Islanding and Special Protection Devices

2017-05-31T01:28:37Z

A1694154: Blanked the page

Projects:2016s2-215 Bhutan Power System Islanding and Special Protection Devices

2017-05-31T01:17:48Z

A1694154: /* Overview */

In this industrialized world, the interconnection of power transmission and generation is ever increasing. The increasing load is forcing power systems to operate closer to their stability limit. If appropriate actions are not taken timely, this ramping load and high degree of interconnection can lead to cascading failure which can result in total power black outs. Power blackouts not only causes inconveniences to the customers but can cause a huge monetary loss to the industries and to the nation.

In a large interconnected power systems network, the system tends to split into smaller sections during the disturbances due to the tripping initiated by grid protection system. This is an unintentional formation of island and has a potential to damage equipment and weaken power system security. To prevent unintentional islanding, it is important to form forced controlled islands which are achieved by generation or load shedding.

The objective of this thesis is to identify how Bhutan Power System (BPS) would effectively island from Indian grid when there are disturbances outside BPS. Reliability of Bhutan power system depends on the stability of Indian grid due to large interconnections. With the present scenario of transmission network, BPS is not able to safely island from the Indian grid during the disturbance / outage of the Indian grid.

The methodology adopted for this study is through Contingency Analysis which is basically a “what if” scenario that evaluates the impact of contingencies on the electric power system. In this thesis, Load flow and contingency analysis has been carried out in PSS®E simulator to create scenario of controlled island.

== 1 Introduction ==

== Overview ==

Power system is a complex network consisting generation, transmission, sub-transmission and distribution networks. Power systems are normally designed and build to be adequate for normal load flows and for certain reasonable contingences ensuring stability of the system during the loss of any one of the line components and equipment. However, in the event of major disturbances with considerable loss of transmission lines and generating capacity, the remaining networks may not be in position to balance the load and generation. If adequate remedial actions are not taken on time, it may lead to a catastrophic failure and power system blackout. Many literatures reveal that black out due to cascading effect can be prevented through controlled splitting of a power system into number of islands [15].

The studies in this thesis has been focused on feasibility of formation of stable island or isolating the Bhutan Power System (BPS) from Indian grid during the disturbances in one of the grids outside BPS.

The BPS currently consists five hydro power generation plant with an installed capacity of 1480 MW. The transmission of domestic power is 220 kV, 132 kV & 66 kV voltage levels. Bhutan has two regional grid, eastern grid and western grid. Most of the power generation is exported to India through 400 kV, 220 kV and 132 kV level. Eastern grid has only one generation plant and it is radially connected to North Eastern Region grid of India through two 132kV Transmission lines. Western grid is connected to Indian grid through four 400kV Lines and three 220 kV transmission lines.
More than 75% of the power generation is exported to India since domestic demand is only around 350 MW. As Bhutan has a plan to harness 10,000 MW of power by 2020 of which major power shall be exported to India, it is expected that the interconnection of the transmission shall increase by many folds.

== Motivation ==

The motivation for working on this topic were the inability to island Bhutan system under contingencies and to radial/islanded feed of Bhutan’s domestic load. Numerous blackouts that occurred in Bhutan in recent years due to outages of the interconnected regional system in India.
One example of such incident is the recent system outage that occurred at Chhukha Hydropower Plant on 16.03.2016. 440/220 kV, 315 MVA ICT-I & II at Binaguri substation (India) tripped on overcurrent protection on B phase which initiated cascading tripping on 220 kV network on overloading. There was a total black out in North Bengal (India) region and Bhutan which left thousands of customers in the dark state for hours.

If any of such disasters are to be avoided in future, a detailed study and analyses for the causes of the failure and the sequence of events should carefully be carried out. This will not only enhance the understanding of large system behaviour in the event of disaster but also helps in selecting and placement of protection devices to avoid such cascading disaster.

Reliability of Bhutan power system depends on the stability of the Indian grid due to large interconnection. With the present scenario of transmission network, BPS is not able to safely island from the Indian grid during the disturbance / outage of the Indian grid. Whenever there is a disturbance in the Indian grid, Bhutan grid trips along with the Indian grid. There are damages to the equipment of the power plant transmission utilities, interruption to the production cycle of the industries and a huge revenue loss to the Bhutan Government.

== 1.3 Objectives ==

The main objective of this thesis is to “Study and Identify how BPS would effectively island from international connection” when there are disturbances outside BPS. It is aimed to achieve this objective by carrying out:

1. Contingency Analysis on BPS on various contingency conditions.

2. Study on the protection devices for incorporation in the generation/transmission system efficient system operation during contingency.

Projects:2016s2-215 Bhutan Power System Islanding and Special Protection Devices

2017-05-31T01:17:07Z

A1694154: /* = = Overview == */

In this industrialized world, the interconnection of power transmission and generation is ever increasing. The increasing load is forcing power systems to operate closer to their stability limit. If appropriate actions are not taken timely, this ramping load and high degree of interconnection can lead to cascading failure which can result in total power black outs. Power blackouts not only causes inconveniences to the customers but can cause a huge monetary loss to the industries and to the nation.

In a large interconnected power systems network, the system tends to split into smaller sections during the disturbances due to the tripping initiated by grid protection system. This is an unintentional formation of island and has a potential to damage equipment and weaken power system security. To prevent unintentional islanding, it is important to form forced controlled islands which are achieved by generation or load shedding.

The objective of this thesis is to identify how Bhutan Power System (BPS) would effectively island from Indian grid when there are disturbances outside BPS. Reliability of Bhutan power system depends on the stability of Indian grid due to large interconnections. With the present scenario of transmission network, BPS is not able to safely island from the Indian grid during the disturbance / outage of the Indian grid.

The methodology adopted for this study is through Contingency Analysis which is basically a “what if” scenario that evaluates the impact of contingencies on the electric power system. In this thesis, Load flow and contingency analysis has been carried out in PSS®E simulator to create scenario of controlled island.

== 1 Introduction ==

== Overview ==

Power system is a complex network consisting generation, transmission, sub-transmission and distribution networks. Power systems are normally designed and build to be adequate for normal load flows and for certain reasonable contingences ensuring stability of the system during the loss of any one of the line components and equipment. However, in the event of major disturbances with considerable loss of transmission lines and generating capacity, the remaining networks may not be in position to balance the load and generation. If adequate remedial actions are not taken on time, it may lead to a catastrophic failure and power system blackout. Many literatures reveal that black out due to cascading effect can be prevented through controlled splitting of a power system into number of islands [15].

The studies in this thesis has been focused on feasibility of formation of stable island or isolating the Bhutan Power System (BPS) from Indian grid during the disturbances in one of the grids outside BPS.

The BPS currently consists five hydro power generation plant with an installed capacity of 1480 MW. The transmission of domestic power is 220 kV, 132 kV & 66 kV voltage levels. Bhutan has two regional grid, eastern grid and western grid. Most of the power generation is exported to India through 400 kV, 220 kV and 132 kV level. Eastern grid has only one generation plant and it is radially connected to North Eastern Region grid of India through two 132kV Transmission lines. Western grid is connected to Indian grid through four 400kV Lines and three 220 kV transmission lines.
More than 75% of the power generation is exported to India since domestic demand is only around 350 MW. As Bhutan has a plan to harness 10,000 MW of power by 2020 of which major power shall be exported to India, it is expected that the interconnection of the transmission shall increase by many folds.

Motivation

The motivation for working on this topic were the inability to island Bhutan system under contingencies and to radial/islanded feed of Bhutan’s domestic load. Numerous blackouts that occurred in Bhutan in recent years due to outages of the interconnected regional system in India.
One example of such incident is the recent system outage that occurred at Chhukha Hydropower Plant on 16.03.2016. 440/220 kV, 315 MVA ICT-I & II at Binaguri substation (India) tripped on overcurrent protection on B phase which initiated cascading tripping on 220 kV network on overloading. There was a total black out in North Bengal (India) region and Bhutan which left thousands of customers in the dark state for hours.

If any of such disasters are to be avoided in future, a detailed study and analyses for the causes of the failure and the sequence of events should carefully be carried out. This will not only enhance the understanding of large system behaviour in the event of disaster but also helps in selecting and placement of protection devices to avoid such cascading disaster.

Reliability of Bhutan power system depends on the stability of the Indian grid due to large interconnection. With the present scenario of transmission network, BPS is not able to safely island from the Indian grid during the disturbance / outage of the Indian grid. Whenever there is a disturbance in the Indian grid, Bhutan grid trips along with the Indian grid. There are damages to the equipment of the power plant transmission utilities, interruption to the production cycle of the industries and a huge revenue loss to the Bhutan Government.

== 1.3 Objectives ==

The main objective of this thesis is to “Study and Identify how BPS would effectively island from international connection” when there are disturbances outside BPS. It is aimed to achieve this objective by carrying out:

1. Contingency Analysis on BPS on various contingency conditions.

2. Study on the protection devices for incorporation in the generation/transmission system efficient system operation during contingency.

Projects:2016s2-215 Bhutan Power System Islanding and Special Protection Devices

2017-05-31T01:16:44Z

A1694154: /* Overview */

In this industrialized world, the interconnection of power transmission and generation is ever increasing. The increasing load is forcing power systems to operate closer to their stability limit. If appropriate actions are not taken timely, this ramping load and high degree of interconnection can lead to cascading failure which can result in total power black outs. Power blackouts not only causes inconveniences to the customers but can cause a huge monetary loss to the industries and to the nation.

In a large interconnected power systems network, the system tends to split into smaller sections during the disturbances due to the tripping initiated by grid protection system. This is an unintentional formation of island and has a potential to damage equipment and weaken power system security. To prevent unintentional islanding, it is important to form forced controlled islands which are achieved by generation or load shedding.

The objective of this thesis is to identify how Bhutan Power System (BPS) would effectively island from Indian grid when there are disturbances outside BPS. Reliability of Bhutan power system depends on the stability of Indian grid due to large interconnections. With the present scenario of transmission network, BPS is not able to safely island from the Indian grid during the disturbance / outage of the Indian grid.

The methodology adopted for this study is through Contingency Analysis which is basically a “what if” scenario that evaluates the impact of contingencies on the electric power system. In this thesis, Load flow and contingency analysis has been carried out in PSS®E simulator to create scenario of controlled island.

== 1 Introduction ==

== = Overview == =

Power system is a complex network consisting generation, transmission, sub-transmission and distribution networks. Power systems are normally designed and build to be adequate for normal load flows and for certain reasonable contingences ensuring stability of the system during the loss of any one of the line components and equipment. However, in the event of major disturbances with considerable loss of transmission lines and generating capacity, the remaining networks may not be in position to balance the load and generation. If adequate remedial actions are not taken on time, it may lead to a catastrophic failure and power system blackout. Many literatures reveal that black out due to cascading effect can be prevented through controlled splitting of a power system into number of islands [15].

The studies in this thesis has been focused on feasibility of formation of stable island or isolating the Bhutan Power System (BPS) from Indian grid during the disturbances in one of the grids outside BPS.

The BPS currently consists five hydro power generation plant with an installed capacity of 1480 MW. The transmission of domestic power is 220 kV, 132 kV & 66 kV voltage levels. Bhutan has two regional grid, eastern grid and western grid. Most of the power generation is exported to India through 400 kV, 220 kV and 132 kV level. Eastern grid has only one generation plant and it is radially connected to North Eastern Region grid of India through two 132kV Transmission lines. Western grid is connected to Indian grid through four 400kV Lines and three 220 kV transmission lines.
More than 75% of the power generation is exported to India since domestic demand is only around 350 MW. As Bhutan has a plan to harness 10,000 MW of power by 2020 of which major power shall be exported to India, it is expected that the interconnection of the transmission shall increase by many folds.

Motivation

The motivation for working on this topic were the inability to island Bhutan system under contingencies and to radial/islanded feed of Bhutan’s domestic load. Numerous blackouts that occurred in Bhutan in recent years due to outages of the interconnected regional system in India.
One example of such incident is the recent system outage that occurred at Chhukha Hydropower Plant on 16.03.2016. 440/220 kV, 315 MVA ICT-I & II at Binaguri substation (India) tripped on overcurrent protection on B phase which initiated cascading tripping on 220 kV network on overloading. There was a total black out in North Bengal (India) region and Bhutan which left thousands of customers in the dark state for hours.

If any of such disasters are to be avoided in future, a detailed study and analyses for the causes of the failure and the sequence of events should carefully be carried out. This will not only enhance the understanding of large system behaviour in the event of disaster but also helps in selecting and placement of protection devices to avoid such cascading disaster.

Reliability of Bhutan power system depends on the stability of the Indian grid due to large interconnection. With the present scenario of transmission network, BPS is not able to safely island from the Indian grid during the disturbance / outage of the Indian grid. Whenever there is a disturbance in the Indian grid, Bhutan grid trips along with the Indian grid. There are damages to the equipment of the power plant transmission utilities, interruption to the production cycle of the industries and a huge revenue loss to the Bhutan Government.

== 1.3 Objectives ==

The main objective of this thesis is to “Study and Identify how BPS would effectively island from international connection” when there are disturbances outside BPS. It is aimed to achieve this objective by carrying out:

1. Contingency Analysis on BPS on various contingency conditions.

2. Study on the protection devices for incorporation in the generation/transmission system efficient system operation during contingency.

Projects:2016s2-215 Bhutan Power System Islanding and Special Protection Devices

2017-05-31T01:16:06Z

A1694154: /* 1.2 Motivation */

In this industrialized world, the interconnection of power transmission and generation is ever increasing. The increasing load is forcing power systems to operate closer to their stability limit. If appropriate actions are not taken timely, this ramping load and high degree of interconnection can lead to cascading failure which can result in total power black outs. Power blackouts not only causes inconveniences to the customers but can cause a huge monetary loss to the industries and to the nation.

In a large interconnected power systems network, the system tends to split into smaller sections during the disturbances due to the tripping initiated by grid protection system. This is an unintentional formation of island and has a potential to damage equipment and weaken power system security. To prevent unintentional islanding, it is important to form forced controlled islands which are achieved by generation or load shedding.

The objective of this thesis is to identify how Bhutan Power System (BPS) would effectively island from Indian grid when there are disturbances outside BPS. Reliability of Bhutan power system depends on the stability of Indian grid due to large interconnections. With the present scenario of transmission network, BPS is not able to safely island from the Indian grid during the disturbance / outage of the Indian grid.

The methodology adopted for this study is through Contingency Analysis which is basically a “what if” scenario that evaluates the impact of contingencies on the electric power system. In this thesis, Load flow and contingency analysis has been carried out in PSS®E simulator to create scenario of controlled island.

== 1 Introduction ==

== Overview ==

Power system is a complex network consisting generation, transmission, sub-transmission and distribution networks. Power systems are normally designed and build to be adequate for normal load flows and for certain reasonable contingences ensuring stability of the system during the loss of any one of the line components and equipment. However, in the event of major disturbances with considerable loss of transmission lines and generating capacity, the remaining networks may not be in position to balance the load and generation. If adequate remedial actions are not taken on time, it may lead to a catastrophic failure and power system blackout. Many literatures reveal that black out due to cascading effect can be prevented through controlled splitting of a power system into number of islands [15].

The studies in this thesis has been focused on feasibility of formation of stable island or isolating the Bhutan Power System (BPS) from Indian grid during the disturbances in one of the grids outside BPS.

The BPS currently consists five hydro power generation plant with an installed capacity of 1480 MW. The transmission of domestic power is 220 kV, 132 kV & 66 kV voltage levels. Bhutan has two regional grid, eastern grid and western grid. Most of the power generation is exported to India through 400 kV, 220 kV and 132 kV level. Eastern grid has only one generation plant and it is radially connected to North Eastern Region grid of India through two 132kV Transmission lines. Western grid is connected to Indian grid through four 400kV Lines and three 220 kV transmission lines.
More than 75% of the power generation is exported to India since domestic demand is only around 350 MW. As Bhutan has a plan to harness 10,000 MW of power by 2020 of which major power shall be exported to India, it is expected that the interconnection of the transmission shall increase by many folds.

Motivation

The motivation for working on this topic were the inability to island Bhutan system under contingencies and to radial/islanded feed of Bhutan’s domestic load. Numerous blackouts that occurred in Bhutan in recent years due to outages of the interconnected regional system in India.
One example of such incident is the recent system outage that occurred at Chhukha Hydropower Plant on 16.03.2016. 440/220 kV, 315 MVA ICT-I & II at Binaguri substation (India) tripped on overcurrent protection on B phase which initiated cascading tripping on 220 kV network on overloading. There was a total black out in North Bengal (India) region and Bhutan which left thousands of customers in the dark state for hours.

If any of such disasters are to be avoided in future, a detailed study and analyses for the causes of the failure and the sequence of events should carefully be carried out. This will not only enhance the understanding of large system behaviour in the event of disaster but also helps in selecting and placement of protection devices to avoid such cascading disaster.

Reliability of Bhutan power system depends on the stability of the Indian grid due to large interconnection. With the present scenario of transmission network, BPS is not able to safely island from the Indian grid during the disturbance / outage of the Indian grid. Whenever there is a disturbance in the Indian grid, Bhutan grid trips along with the Indian grid. There are damages to the equipment of the power plant transmission utilities, interruption to the production cycle of the industries and a huge revenue loss to the Bhutan Government.

== 1.3 Objectives ==

The main objective of this thesis is to “Study and Identify how BPS would effectively island from international connection” when there are disturbances outside BPS. It is aimed to achieve this objective by carrying out:

1. Contingency Analysis on BPS on various contingency conditions.

2. Study on the protection devices for incorporation in the generation/transmission system efficient system operation during contingency.

Projects:2016s2-215 Bhutan Power System Islanding and Special Protection Devices

2017-05-31T01:14:58Z

A1694154: /* 1.1 Overview */

In this industrialized world, the interconnection of power transmission and generation is ever increasing. The increasing load is forcing power systems to operate closer to their stability limit. If appropriate actions are not taken timely, this ramping load and high degree of interconnection can lead to cascading failure which can result in total power black outs. Power blackouts not only causes inconveniences to the customers but can cause a huge monetary loss to the industries and to the nation.

In a large interconnected power systems network, the system tends to split into smaller sections during the disturbances due to the tripping initiated by grid protection system. This is an unintentional formation of island and has a potential to damage equipment and weaken power system security. To prevent unintentional islanding, it is important to form forced controlled islands which are achieved by generation or load shedding.

The objective of this thesis is to identify how Bhutan Power System (BPS) would effectively island from Indian grid when there are disturbances outside BPS. Reliability of Bhutan power system depends on the stability of Indian grid due to large interconnections. With the present scenario of transmission network, BPS is not able to safely island from the Indian grid during the disturbance / outage of the Indian grid.

The methodology adopted for this study is through Contingency Analysis which is basically a “what if” scenario that evaluates the impact of contingencies on the electric power system. In this thesis, Load flow and contingency analysis has been carried out in PSS®E simulator to create scenario of controlled island.

== 1 Introduction ==

== Overview ==

Power system is a complex network consisting generation, transmission, sub-transmission and distribution networks. Power systems are normally designed and build to be adequate for normal load flows and for certain reasonable contingences ensuring stability of the system during the loss of any one of the line components and equipment. However, in the event of major disturbances with considerable loss of transmission lines and generating capacity, the remaining networks may not be in position to balance the load and generation. If adequate remedial actions are not taken on time, it may lead to a catastrophic failure and power system blackout. Many literatures reveal that black out due to cascading effect can be prevented through controlled splitting of a power system into number of islands [15].

The studies in this thesis has been focused on feasibility of formation of stable island or isolating the Bhutan Power System (BPS) from Indian grid during the disturbances in one of the grids outside BPS.

The BPS currently consists five hydro power generation plant with an installed capacity of 1480 MW. The transmission of domestic power is 220 kV, 132 kV & 66 kV voltage levels. Bhutan has two regional grid, eastern grid and western grid. Most of the power generation is exported to India through 400 kV, 220 kV and 132 kV level. Eastern grid has only one generation plant and it is radially connected to North Eastern Region grid of India through two 132kV Transmission lines. Western grid is connected to Indian grid through four 400kV Lines and three 220 kV transmission lines.
More than 75% of the power generation is exported to India since domestic demand is only around 350 MW. As Bhutan has a plan to harness 10,000 MW of power by 2020 of which major power shall be exported to India, it is expected that the interconnection of the transmission shall increase by many folds.

== 1.2 Motivation ==

The motivation for working on this topic were the inability to island Bhutan system under contingencies and to radial/islanded feed of Bhutan’s domestic load. Numerous blackouts that occurred in Bhutan in recent years due to outages of the interconnected regional system in India.
One example of such incident is the recent system outage that occurred at Chhukha Hydropower Plant on 16.03.2016. 440/220 kV, 315 MVA ICT-I & II at Binaguri substation (India) tripped on overcurrent protection on B phase which initiated cascading tripping on 220 kV network on overloading. There was a total black out in North Bengal (India) region and Bhutan which left thousands of customers in the dark state for hours.

If any of such disasters are to be avoided in future, a detailed study and analyses for the causes of the failure and the sequence of events should carefully be carried out. This will not only enhance the understanding of large system behaviour in the event of disaster but also helps in selecting and placement of protection devices to avoid such cascading disaster.

Reliability of Bhutan power system depends on the stability of the Indian grid due to large interconnection. With the present scenario of transmission network, BPS is not able to safely island from the Indian grid during the disturbance / outage of the Indian grid. Whenever there is a disturbance in the Indian grid, Bhutan grid trips along with the Indian grid. There are damages to the equipment of the power plant transmission utilities, interruption to the production cycle of the industries and a huge revenue loss to the Bhutan Government.

== 1.3 Objectives ==

The main objective of this thesis is to “Study and Identify how BPS would effectively island from international connection” when there are disturbances outside BPS. It is aimed to achieve this objective by carrying out:

1. Contingency Analysis on BPS on various contingency conditions.

2. Study on the protection devices for incorporation in the generation/transmission system efficient system operation during contingency.

Projects:2016s2-215 Bhutan Power System Islanding and Special Protection Devices

2017-05-31T01:12:46Z

A1694154:

In this industrialized world, the interconnection of power transmission and generation is ever increasing. The increasing load is forcing power systems to operate closer to their stability limit. If appropriate actions are not taken timely, this ramping load and high degree of interconnection can lead to cascading failure which can result in total power black outs. Power blackouts not only causes inconveniences to the customers but can cause a huge monetary loss to the industries and to the nation.

In a large interconnected power systems network, the system tends to split into smaller sections during the disturbances due to the tripping initiated by grid protection system. This is an unintentional formation of island and has a potential to damage equipment and weaken power system security. To prevent unintentional islanding, it is important to form forced controlled islands which are achieved by generation or load shedding.

The objective of this thesis is to identify how Bhutan Power System (BPS) would effectively island from Indian grid when there are disturbances outside BPS. Reliability of Bhutan power system depends on the stability of Indian grid due to large interconnections. With the present scenario of transmission network, BPS is not able to safely island from the Indian grid during the disturbance / outage of the Indian grid.

The methodology adopted for this study is through Contingency Analysis which is basically a “what if” scenario that evaluates the impact of contingencies on the electric power system. In this thesis, Load flow and contingency analysis has been carried out in PSS®E simulator to create scenario of controlled island.

== 1 Introduction ==

== 1.1 Overview ==

Power system is a complex network consisting generation, transmission, sub-transmission and distribution networks. Power systems are normally designed and build to be adequate for normal load flows and for certain reasonable contingences ensuring stability of the system during the loss of any one of the line components and equipment. However, in the event of major disturbances with considerable loss of transmission lines and generating capacity, the remaining networks may not be in position to balance the load and generation. If adequate remedial actions are not taken on time, it may lead to a catastrophic failure and power system blackout. Many literatures reveal that black out due to cascading effect can be prevented through controlled splitting of a power system into number of islands [15].

The studies in this thesis has been focused on feasibility of formation of stable island or isolating the Bhutan Power System (BPS) from Indian grid during the disturbances in one of the grids outside BPS.

The BPS currently consists five hydro power generation plant with an installed capacity of 1480 MW. The transmission of domestic power is 220 kV, 132 kV & 66 kV voltage levels. Bhutan has two regional grid, eastern grid and western grid. Most of the power generation is exported to India through 400 kV, 220 kV and 132 kV level. Eastern grid has only one generation plant and it is radially connected to North Eastern Region grid of India through two 132kV Transmission lines. Western grid is connected to Indian grid through four 400kV Lines and three 220 kV transmission lines.
More than 75% of the power generation is exported to India since domestic demand is only around 350 MW. As Bhutan has a plan to harness 10,000 MW of power by 2020 of which major power shall be exported to India, it is expected that the interconnection of the transmission shall increase by many folds.

== 1.2 Motivation ==

The motivation for working on this topic were the inability to island Bhutan system under contingencies and to radial/islanded feed of Bhutan’s domestic load. Numerous blackouts that occurred in Bhutan in recent years due to outages of the interconnected regional system in India.
One example of such incident is the recent system outage that occurred at Chhukha Hydropower Plant on 16.03.2016. 440/220 kV, 315 MVA ICT-I & II at Binaguri substation (India) tripped on overcurrent protection on B phase which initiated cascading tripping on 220 kV network on overloading. There was a total black out in North Bengal (India) region and Bhutan which left thousands of customers in the dark state for hours.

If any of such disasters are to be avoided in future, a detailed study and analyses for the causes of the failure and the sequence of events should carefully be carried out. This will not only enhance the understanding of large system behaviour in the event of disaster but also helps in selecting and placement of protection devices to avoid such cascading disaster.

Reliability of Bhutan power system depends on the stability of the Indian grid due to large interconnection. With the present scenario of transmission network, BPS is not able to safely island from the Indian grid during the disturbance / outage of the Indian grid. Whenever there is a disturbance in the Indian grid, Bhutan grid trips along with the Indian grid. There are damages to the equipment of the power plant transmission utilities, interruption to the production cycle of the industries and a huge revenue loss to the Bhutan Government.

== 1.3 Objectives ==

The main objective of this thesis is to “Study and Identify how BPS would effectively island from international connection” when there are disturbances outside BPS. It is aimed to achieve this objective by carrying out:

1. Contingency Analysis on BPS on various contingency conditions.

2. Study on the protection devices for incorporation in the generation/transmission system efficient system operation during contingency.

Projects:2016s2-215 Bhutan Power System Islanding and Special Protection Devices

2017-05-31T01:11:10Z

Projects:2016s2-215 Bhutan Power System Islanding and Special Protection Devices

2017-05-31T00:21:04Z

A1694154:

Projects:2016s2-215 Bhutan Power System Islanding and Special Protection Devices

2016-08-31T00:02:41Z

A1694154: Created page with "Bhutan export power to India. Currently there are nine international feeders connecting Bhutan and India at 132 kV, 220 kV & 400 kV level. The fault outside Bhutan results in..."

Bhutan export power to India. Currently there are nine international feeders connecting Bhutan and India at 132 kV, 220 kV & 400 kV level. The fault outside Bhutan results in tripping from the Bhutan Generation whereby causing black out in the Country.

In this project, case studies shall be carried out on how the Bhutan power system could effectively island from Indian grid connection when there are disturbances in any part of the grid outside Bhutan. This would ensure reliability to the entire connected grid. Studies on protection devices for incorporation into the transmission system for efficient system operation during contingencies shall be carried out.

Students: Chador Phuntsho & Sherub

Supervisors: Professor Michael Liebelt & Mr. Matthew Trinkle