抽水蓄能静止变频器换相超前角动态控制策略研究与试验验证  

Research and Experimental Validation of Dynamic Control Strategy of the Phase Change Commutation Lead Angle in Pumped Storage Static Frequency Converters

作　　者：于金龙 王戬 尹广斌 王洪彬 陈洪顺 王亚龙 YU Jinlong;WANG Jian;YIN Guangbin;WANG Hongbin;CHEN Hongshun;WANG Yalong(Fengman Training Center of State Grid Xinyuan Group Co.,Ltd.,132013)

机构地区：[1]国网新源集团有限公司丰满培训中心,132013

出　　处：《电机技术》2024年第1期19-23,共5页Electrical Machinery Technology

摘　　要：静止变频器是我国抽水蓄能电站的核心设备。而在静止变频起动过程中,自然换相阶段逆变器换相一般采用换相超前角恒定的控制策略,易造成换相失败的问题。针对该问题,提出了一种逆变器换相超前角动态控制策略。该策略主要通过机端电压和回路电流进行动态控制换相超前角,以避免采用恒换相超前角策略易出现的问题;同时还引入换相裕度,以提高换相成功率,提升系统稳定性。最终通过试验,以功率因数和起动效率等指标验证了该策略的可行性,证明了该策略相比传统控制方法具有起动效率佳、功率因数高等优点。Static frequency converter is the core equip-ment of pumped storage power station in China.In the pro-cess of static variable frequency starting,the commutation of inverter in natural commutation stage generally adopts the control strategy of constant commutation lead angle,but frequently resulting in commutation failure.Aiming at this problem,a dynamic control strategy of inverter commuta-tion lead angle is proposed.This strategy mainly controls the commutation lead angle dynamically by means of the terminal voltage and loop current,so as to avoid the prob-lems to occur when using the constant commutation lead angle strategy.At the same time,the proper commutation margin is also introduced,to improve the success rate of commutation and the stability of the system.Finally,feasi-bility of the strategy is verified through large quantities of experiments in which power factor and starting efficiency are taken as validation standards,proving that the strategy has the advantages of good starting efficiency and high power factor when comparing with the traditional control method.

关 键 词：抽水蓄能 静止变频器 逆变器 换相超前角 起动效率 功率因数 

分 类 号：TM306[电气工程—电机]