Projects:2018s2-235UG PMU Test generator

Project Team

project student :

• Yasin Mohammadi
• George Qian

supervisors :

• Prof. Keith Kikkert
• Prof. Nesimi Ertugrul

Objectives

The aim of this project is to construct a 3 phase PMU test generator capable of generating all the test signals required under IEEE C37.118.1 (2011 and 2014). The waveforms to be generated are to be produced digitally and converted to analogue waveforms using digital to analogue converters and (up to) 1W audio amplifiers.

• 1) Steady state compliance:

   The generator is the produce 50 Hz 3 phase signals that can be varied op to 5 Hz in frequency and 20% in amplitude.

• 2) Dynamic compliance:

   Bandwidth measurement (modulation test)
   Performance during ramp test
   Step changes in phase and magnitude

Background

Phasor measurement Unit

PMU is a device used to estimate the amplitude and phase angle of phasor in power grid by using synchronous common time source. Nowadays, it is more used to detect whether the smart grid is stable. About the history of PMU, in 1893, Charles Proteus Steinmetz published a paper on clear mathematical descriptions of AC waveforms, which he called phasors, a small point of PMU for the first time. The phasor measurement unit (PMU), which was invented by Dr. Arun G. Phadke and Dr. James S. Thorp at Virginia Tech in 1988, was an early model of PMU, and Macrodyne built the first real PMU in 1992 [3]. Since the 1990s, PMU has been installed in power grids in North America and many other countries in the world. The field test of synchronous phasor measurement technology not only verifies the effectiveness of simultaneous phasor measurement but also accumulates experience for the field operation of PMU [3]. Synchronous phasor measurements will allow people to measure and analyze the state of the entire power system more accurately based on real-time data collected from phasor measurement units located throughout the network. Accurate and time-labeled phasor data can be collected promptly, which allows system controllers to quickly identify power system events, such as power flow problems, frequency variability from different parts of the system and dynamic angle separation problems, through visual systems. The monitoring provides an accurate method for controlling the power flow from multiple energy sources (nuclear, coal, wind). PMU provides utilities with more control and monitoring capabilities and is considered one of the most basic measurement devices in future power systems. PMU can reduce load and other load control technology, honestly realize the management of power system and improve the reliability of power grid by early detection of faults, to achieve the isolation of operating system, to prevent blackouts. Accurate analysis and automatic correction of system degradation source to improve power quality. These are the original intentions of this project [3].