大型变电站电容器电抗率的选择

华电技术 ›› 2013, Vol. 35 ›› Issue (9): 32-35.

大型变电站电容器电抗率的选择

(广东电网物流服务中心，广东广州〓510630)

出版日期:2013-09-25 发布日期:2013-10-22

Selection of series reactance rate of capacitor in large substation

(Guangdong Power Grid Logistics Service Center，Guangzhou 510630, China)

Online:2013-09-25 Published:2013-10-22

摘要/Abstract

摘要： 摘要：由于电网存在谐波，变电站并联补偿电容器会在某种运行方式下出现谐波放大现象。根据500kV砚都变电站第3台主变压器电容器的配置情况，提出了设计并联补偿电容器的一般流程。通过选择合理的电抗率，避免电容器支路产生谐波放大，同时确保电容器所承受的过电压、励磁涌流不超过允许范围，并对变电站内具有不同电抗率的电容器分组投切允许方式进行了讨论。

关键词: 关键词：变电站, 电网谐波, 并联补偿电容器, 电抗率, 谐波放大, 励磁涌流

Abstract: Abstract:Due to that there is harmonic in power grid, the harmonic amplification may occur in parallel compensation capacitor of substation under certain operation mode. According to the configuration of the capacitor for the third main transformer of 500kV Yandu substation, the general process of parallel compensation capacitor design was proposed. Depending on the rational selection of the series reactance rate, the harmonic amplification in capacitor branch can be avoided, and it can be ensured that the overvoltage and the surge excitation current on the capacitor to be limited in permissible range. The allowed grouping switch mode of the capacitors in the substation with different series reactance rate was discussed too in this paper.

Key words: Key words:substation, power grid harmonic, parallel compensating capacitor, series reactance rate, harmonic amplifying, excitation surge current

汤慧敏. 大型变电站电容器电抗率的选择[J]. 华电技术, 2013, 35(9): 32-35.

TANG Huimin. Selection of series reactance rate of capacitor in large substation[J]. Huadian Technology, 2013, 35(9): 32-35.