Projects:2018s2-235PG PMU Test generator

Abstract here

Introduction

As sustainable energy accounts for an increasing proportion of daily electricity production, the load on existing power facilities continues to increase due to unstable sources of energy such as wind and solar energy. It is known that when the energy supply is unstable, the frequency and phase of the power system may change, and the PMU (phasor measurement unit) emerges. The question now is how do we test our PMU to do its job. We can find very expensive test machines on the market, but in this project, we will try to use the daily equipment of the electrical and electronic laboratory to complete the test.

Project team

Project students

• Yanying He
• Yifan Chen

Supervisors

• Keith Kikkert

Objectives

• A controllable digital 3-phase signal generator (linked with DAC) • The accuracy should meet the standard • A proper interface of signal control

Background

DDS（Direct digital synthesis）

DDS uses a phase accumulator to generate an increasing phase, and then uses a specific algorithm to make each phase correspond to a different value, thereby generating a sine wave that can control the frequency.

CORDIC

CORDIC is the core algorithm for generating sine waves in DDS. In the algorithm, we rotate the corresponding phasor by a decreasing angle. After a certain number of iterations, it rotates to the corresponding position, thus generating a phase that rotates continuously.

References

[1] a, b, c, "Simple page", In Proceedings of the Conference of Simpleness, 2010.

[2] ...