自励磁过电压根源的研究

针对特高压电网,较长的线路导致其电容值很大,当线路甩负荷时,产生的电流是容性的,该容性电流会产生自励磁过电压,对该类型过电压的研究至关电网的安全和绝缘。通过建立模型,给出假定前提,运用迭代算法进行分析,并用MATLAB仿真,证实自励磁过电压产生的原因之一是自激震荡。

For the UHV power network, the longer line leads to a large capacitance. When the line load rejection, the generated current is capacitive, and the capacitive current will produce self-excitation overvoltage. The study of this type of overvoltage is very important to the safety and insulation of power grid. Through the establishment of the model, the presupposition is given, the iterative algorithm is used to analyze it, and the MATLAB simulation is used to verify that one of the causes of the self-excitation overvoltage is self-excited oscillation.