摘要
从理论分析和仿真两个方面，对先进静止无功功率发生器（ＡＳＶＧ）在系统电压不对称条件下的运行特性进行了详细的分析，指出了由于负序电压造成的功率流动所引起直流电容电压脉动和负序电流的影响，是决定ＡＳＶＧ运行性能的关键因素。不对称度的增加将进一步增大电容电压的脉动和负序电流的大小。采用系统电压正序分量作为逆变电压的同步信号，增大电容量Ｃ和漏抗值Ｌ的大小，在直流电容侧并联１００Ｈｚ的ＬＣ谐振滤波器等措施。
? The influence of the system voltage unbalance on the advanced static var generator (ASVG) has been discussed through the ways of theoretical analysis and simulation. It is recognized that the DC capacitor voltage pulsation and negative sequence current, which is caused by the power flow due to the system negative sequence voltage, is the key point that influences the operation of ASVG. Larger system voltage unbalance degree causes larger capacitor voltage pulsation and negative sequence current. Using the following control method such as choosing the positive sequence voltage as the synchronizing signal of ASVG output voltage, using larger capacitor C and reactance L, and using a 100 Hz LC resonant filter, restrain the influence of the system voltage unbalance effectively.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1997年第7期55-58,共4页
Journal of Tsinghua University(Science and Technology)
关键词
无功补偿
仿真
电力系统
静止无功发生器
reactive power compensation
unbalance
negative sequence
simulation
