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研究一种兼具大容量无功补偿能力的注入式并联混合有源滤波器,并分析其在工程应用中发现的直流侧电压抬升现象及这种现象产生的原因,在此基础上提出从采用多重化主电路结构、滞环控制法、回灌电流前馈控制法和脱离整流电源直接对直流侧电压进行控制等几个方面来抑制直流侧电压抬升的方法。考虑到是在原有已应用的系统上进行完善来避免直流侧电压的抬升,采用相对方便和简单的滞环控制和回灌电流前馈控制相结合的方法。仿真和现场应用结果证明所提出的方法能有效抑制直流侧电压的抬升,从而保障系统的安全稳定运行。
In this paper, an injection parallel hybrid active power filter with large capacity of reactive power compensation is studied, and the DC voltage rise phenomenon found in engineering applications is analyzed and the reasons for this phenomenon are analyzed. Based on this, Multiple main circuit structure, hysteresis control method, the feedback current feed-forward control method and direct current from the rectifier power supply to control the DC voltage, etc. several aspects to suppress the DC side voltage raising method. Taking into account the existing system has been applied to improve to avoid the DC side of the voltage rise, the use of relatively simple and simple hysteresis control and feedback control of the current feed-back combination of methods. Simulation and field application results show that the proposed method can effectively restrain the rise of DC voltage and ensure the safe and stable operation of the system.