宝鸡换流站交直流系统无功补偿建模与仿真

Modeling and simulation of reactive power compensation for Baoji AC and DC system based on PSCAD

宝鸡换流站交直流系统的实际设备参数和运行状况,由于在传统电网换相换高压直流输电系统中,换流站的换流过程需要消耗大量的无功功率,合理的无功补偿至关重要。介绍了交直流系统的等效模型,分析了换流站无功消耗及分组的计算方法,论述了换流器无功补偿的原则,并采用PSCAD分别对换流站的稳态运行情况和无功补偿装置投入对换流母线电压的影响情况进行了仿真,验证了模型的正确性以及分组投入的可行性,为进一步研究交、直流系统的相互影响奠定基础。

According to the actual equipment parameters and operating conditions of the Baoji AC and DC system, combined with the typical control mode of the HVDC transmission system, due to a large amount of reactive power consumed by the converter station during the commutation process, reasonable AC filter configuration is critical. The reactive power consumption of the converter station and the switching condition of the filter are analyzed in different operation modes. The electromagnetic simulation software PSCAD is used to simulate the steady-state operation of the converter station and the process of switching the AC filter. The simulation results verify the correctness of the model and the feasibility of reactive group switching, which lays a foundation for further study of the interaction between AC and DC systems.