摘要
电网中不对称负荷普遍存在,对系统影响很大。首先对几种一般情况进行分析,分别考虑了系统存在负序分量和零序分量时的情况。然后通过叠加原理,采用Y和△两种接线方式组合,根据电力系统实际情况,得出三相不平衡负载平衡化补偿的实用模型。该模型既适合于三相三线制,也适合于三相四线制接线方式,达到有功电流平衡。最后通过仿真实验和现场实验数据验证理论推导的正确性。
A new reactive power compensation method is developed to reduce the negative and zero sequence components of unbalanced load currents. This method can be employed not only in three-phase three-wire system but also in three-phase four-wire distribution feeders. Unbalanced load current may result in additional losses and damage to power systems. Load compensation is an effective method to eliminate those undesired sequence currents. The compensation uses a Y-connected and △-connected static reactive power compensator to give a different amount of reactive power compensation to each phase. Digital simulations are made to Y-connected and △-connected load.
出处
《继电器》
CSCD
北大核心
2006年第9期76-79,共4页
Relay
关键词
不平衡负载
三相四线制
负荷补偿
叠加原理
unbalanced load current
three-phase four-wire
load compensation
superposition theorem
