Projects:2018s2-235PG PMU Test generator
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.
- Yanying He
- Yifan Chen
- Keith Kikkert
• A controllable digital 3-phase signal generator (linked with DAC) • The accuracy should meet the standard • A proper interface of signal control
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 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.
We use FPGA to generate sine wave through Verilog code, and connect with the labview port on the computer to control the frequency, phase and amplitude of the wave through the computer. The three sine waves are connected to the PMU by hardware such as the DAC undergraduate responsibility, and the PMU will attempt to adjust the signal and generate documentation of the wave information. We compare this document with the documentation generated by Labview to determine if the PMU is accurate.
 a, b, c, "Simple page", In Proceedings of the Conference of Simpleness, 2010.