论文部分内容阅读
新型注入式混合型有源电力滤波器(hybrid active power filter with injection circuit,IHAPF)的有源部分不承受基波电压,因而更适用于高压系统的动态谐波治理和大容量的无功补偿。其拓扑结构中包含基波谐振支路,决定了其直流侧电压很难通过对逆变器的基波有功电流的控制来维持平衡。一般采用不可控整流电路来维持直流侧电压。然而这种方式在装置接入点电压为非理想电压时,逆变侧的能量倒灌常常会引起直流侧电压的抬高甚至飙升,进而影响系统的补偿性能,甚至危及系统的安全运行。该文分析IHAPF系统直流侧电压抬升的原因,提出了滤波器结构选择、优化注入支路参数及直流侧采用PWM可控整流电路等方法来保证直流侧电压的稳定。仿真结果和某变电站注入式混合型有源电力滤波系统的现场运行数据证明了所提方法的正确性和可行性。
The active part of the new type of hybrid active power filter with injection circuit (IHAPF) is not subjected to fundamental voltage, so it is more suitable for dynamic harmonic control and reactive power compensation of high-voltage systems. Its topology includes fundamental resonant branch, which determines that it is difficult to balance the DC voltage of the inverter with the fundamental active current of the inverter. The general use of uncontrolled rectifier circuit to maintain the DC side voltage. However, when the voltage at the access point of the device is not ideal, the energy backflow on the inverter side often causes the voltage of the DC side to rise or even rise, thus affecting the compensation performance of the system and even endangering the safe operation of the system. This paper analyzes the reasons of IHAPF system DC voltage rise, proposes the filter structure selection, optimizing the injection branch parameters and the DC side using PWM controllable rectifier circuit and other methods to ensure the stability of DC voltage. The simulation results and field operation data of a hybrid active power filter system with substation injection prove the correctness and feasibility of the proposed method.