在电力系统中,备用电源自动投入(简称备自投)是提高供电可靠性的重要措施。当用于在配电网中较大区域互投时,在一些情况下可能因电网电压稳定性破坏而导致备自投不成功。以一实际电网为例进行数值仿真计算,分析了影响配电网备自投成功率的因素,提出提高备自投成功率的解决方向。 In the power system, automatic backup power input (referred to as prepared from vote) is to improve the reliability of power supply is an important measure. When used for interoperability in larger areas of the distribution network, in some cases it may be unsuccessful due to the destruction of the grid voltage stability. Taking an actual power grid as an example, the numerical simulation is carried out. The factors that affect the success rate of self-transmission of distribution network equipment are analyzed, and the solution to improve the success rate of self-transmission equipment is proposed.