Design of distribution network UPQC system and Research on Compensation detection control strategy
With the rapid development of science and technology and China's economy,the use of electronic technology has ex-panded to daily life and industrial production,and the load on the power grid has become increasingly complex,making the require-ments for power quality gradually higher.In view of this,the circuit topology of the unified power quality conditioner is improved and optimized,and the left and right series three-phase four-bridge arm mode is adopted.Based on the instantaneous Fourier harmonic detection method,the compensation control detection strategy is derived and studied.The simulation results show that the improved power quality regulator can effectively suppress the existence of harmonics,and the Fourier harmonic detection method can accurately detect the harmonic component.After the system compensation,the harmonic content decreases by 88.73％.After compensation by the unified power quality conditioner system,the voltage unbalance degree of a,b and c three-phase decreases from 18.51％to 1.28％,the phase of current and voltage is basically consistent,and the power factor value is close to 1.The above results show that the compensation detection control method designed in this study can achieve accurate and effective compensation,meet the design re-quirements,and has certain practical significance.
power qualityvoltagetopological structurefourier testcapacitance
万方数据
维普
