摘 要在电力系统发生振荡时，在整个电力系统之中测量组织可能会导致周期性发生很大的改变，而且线路测量阻抗变化也可能会引起距离保护的动作，这样保护装置很有可能会由于系统发生作用而产生误动作。主要对于电力系统对对距离保护的作用进行了综合的分析，并且对于内部电压和电流的发展情况进行了详细的介绍，然后利用 MATLAB/Simulink 软件搭建双侧电源的电力系统模型；利用参数的变化来掌握整个电力系统的发展情况，由此可以了解到电力系统内部电流和电压的发展情况，测量阻抗的波形和变化；并在电力系统设置短路故障（包括三相短路故障、两相短路故障、两相接地故障、单相接地故障），观察和分析各种短路情况下电流、电压、测量阻抗的变化；对比分析电力系统振荡与短路时电气量（电流、电压、测量阻抗）的特点和差别，探究电力系统振荡对距离保护的影响，并为此寻求解决措施。关键词：电力系统振荡；距离保护；振荡闭锁AbstractWhen the power system oscillates, the electrical impedance of the system and the measured impedance of the distance protection may periodically change. In this case, the various protection elements that use these quantities as the measurement target may malfunction due to the oscillation of the system.In this design, the impact of power system oscillation on distance protection is analyzed. Firstly, the change of current, voltage and measured impedance during power system oscillation is analyzed. Then, the power system model of double-side power supply is built using MATLAB/Simulink software ； by changing the power voltage parameters on both sides to simulate the oscillation of the power system, the waveforms and variations of the current, voltage, and measured impedance during the oscillation of the power system are observed and analyzed; and the short-circuit faults (including three-phase short-circuit faults and two-phase short-circuit faults) are set in the power system. , two-phase earth fault, single-phase earth fault) Observe and analyze the...
