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中文摘要：
附加直流控制是抑制低频振荡的有效手段，在多直流输电系统中，附加直流控制地点选择与振荡抑制效果息息相关，选择合适的控制地点尤为关键。基于矩阵束方法辨识得到了振荡模态强相关机组对于多馈入各条直流线路的灵敏度，通过灵敏度进一步挖掘出振荡模态对应的控制敏感点，在控制敏感点附加直流控制将获得最优性能。使用了基于综合性能指标寻求最优参数的小方式直流调制对川渝电网振荡模态进行了仿真验证，结果表明了控制敏感点的准确性。
英文摘要：
The complementary controllers for HVDC transmission systems can be used to suppress the power system low-frequency oscillation, the result of suppression is bound up with the place to locate controllers in muhi-HVDC systems. Sensitivities from high-related generators of oscillation mode to each DC line of muhi-HVDC systems is i- dentified by matrix pencil method in this paper, then the controllability sensitive points of oscillation is found by comparing sensitivities. Complementary control on controllability sensitive point has the best performance. Sichuan- Chongqing oscillation mode is taken as example by using small mode DC modulation based on comprehensive per- formance index to seek the optimal parameters, and the accuracy of controllability sensitive points is illustrated.
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