全功率变速抽水蓄能机组保护配置及整定方法

Protection Configuration and Setting Method of Variable-speed High Renewable Energy Pumped Storage Unit with Full-size Converte

摘要:

正确的保护配置和整定方法是全功率变速抽水蓄能机组安全运行的关键。结合典型全功率变速抽水蓄能机组接线方式，在分析机组运行特性的基础上，提出了适用于各种运行状态的保护配置方法；分析了变频器对机组短路特性的影响；在此基础上，提出了将复压过流保护作为特殊区域的主保护，并给出了适用的保护整定计算方法。所提出的保护配置和整定方法在春厂坝变速抽水蓄能示范电站得到了应用。

Abstract:

Correct protection configuration and setting method is the key to safe operation of variablespeed pumped[JP] storage unit with full-size converter(FSC-VSPSU). Combined with the typical connection mode of FSC-VSPSU，and based on the analysis of unit operation characteristics, the protection configuration method suitable for various operating states is put forward. In view of the influence of frequency converter on short-circuit characteristics of unit, the overcurrent protection is proposed as the main protection of the special area. The applicable calculation method of protection setting is also given. The proposed protection configuration and setting method have been applied to FSC-VSPSU in Chunchang Dam Pumped Storage Power Station.