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从理论上分析了可控整流器型无功补偿装置电路拓扑的可行性,即在触发角接近90°的整流桥直流侧通过直流电抗器短接不会发生断流或过流。分析了装置进行无功补偿的机制,即整流桥吸收无功功率与直流侧平均电流近似成正比。对装置及其控制系统进行了建模,并以此为依据提出了控制器设计的基本要求。对装置电路进行了仿真,并通过小模型样机实验验证了该装置的可行性。这种可控整流器型静止无功补偿装置容量不受电抗值的限制,结构紧凑,可以大幅减少交流电抗器的数量并降低有功损耗,有进一步研究和应用的前景。
The feasibility of circuit topology of controllable rectifier type reactive power compensation device is theoretically analyzed. That is, no interruption or overcurrent occurs at the DC side of the rectifier bridge whose triggering angle is close to 90 ° through the DC reactor. The mechanism of device reactive power compensation is analyzed, that is, the reactive power absorbed by the rectifier bridge is approximately proportional to the average DC current. The device and its control system were modeled, and based on which the basic requirements of controller design were proposed. The circuit of the device was simulated and the feasibility of the device was verified by a small model prototype experiment. The controllable rectifier type static var compensator has the advantages of not being limited in reactance, compact in structure, greatly reducing the number of AC reactors and reducing the active loss, and has further research and application prospects.