基于快速开关型串联补偿装置对配电网继电保护的影响研究

Research on the Effect of Series Compensation Device Based on Fast Switching on Relay Protection in Distribution Network

由于当前配电网建设相对滞后,供电设备老化严重,网架结构不合理,供电半径过长,缺少足够的电源支撑,使配电网出现电压水平低下、网损过重、无功功率短缺等问题,越来越无法满足国民经济的发展需要。因此如何经济高效地解决配电网电压低、损耗高等问题就成为当前电力工作者工作的重点。串联补偿技术通过电容容抗补偿线路感抗,能够提高线路电压并降低线路损耗,是解决配电网现存问题的理想解决方案。但由于传统串补装置存在造价高、体积大、运行维护困难、对线路继电保护影响较大等一系列问题,使串联补偿在实际应用中并未体现出自身的技术优势。随着快速开关型串补装置的出现,上述问题将逐一得到解决。

Due to the lagging construction of distribution network, serious aging of power supply equipment, unreasonable grid structure, long power supply radius and lack of sufficient power supply support points, the distribution network has the problems of low voltage level, heavy network loss and reactive power shortage, which are increasingly unable to meet the development needs of the national economy. Therefore, how to economically and efficiently solve the problems of low voltage and high loss in distribution network has become the focus of the work of power workers. Series compensation technology can improve line voltage and reduce line loss by resisting line inductance through capacitance. It is an ideal solution to solve the existing problems of distribution network. However, due to a series of problems such as high cost, large volume, difficult operation and maintenance, and great impact on line relay protection, the series compensation has not shown its own technical advantages in practical application. With the emergence of fast switching series compensation devices, the above problems will be solved one by one.