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对一种采用可控串补的远距离发电厂输电系统的稳定性进行分析,借助简化模型推导了在不同地点发生三相短路故障时发电厂输出的电磁功率,对电网参数、串补补偿度与输电系统稳定性之间的内在关系进行了分析,研究了不同地点故障对系统稳定性的影响,从而可确定制约输电系统输送能力的故障点。借助该模型分析了制约东北电网伊敏电厂送出能力的故障点,电网的仿真计算结果验证了模型的正确性。
This paper analyzes the stability of a power transmission system using controllable series compensation of long distance power plants and deduces the electromagnetic power output from the power plants when the three-phase short-circuit fault occurs in different places by means of simplified model. The power network parameters, And the stability of transmission system are analyzed. The influence of faults at different locations on the stability of the system is studied, so that the fault points that restrict the transmission capacity of transmission system can be determined. With the aid of this model, the failure points that restrict the sending capacity of Yimin Power Plant in Northeast China Grid are analyzed. The simulation results of power grid verify the correctness of the model.