摘要
为了更好地对三相不平衡负荷进行平衡化补偿,对不平衡负载进行详细分析,提出一种新的基于平衡分量法的无功补偿导纳计算方法。首先,将任何中性点不接地的三相负载分解为平衡负载和一个线间负载之和,通过将三相负载进行分解,可以得到负载所需要补偿的导纳值。补偿导纳的计算可分为平衡负载功率因数补偿、线间负载功率因数补偿以及线间线阻性负载平衡化补偿3部分。然后,对系统电压不对称时的Steinmetz理想补偿网络算法进行修正,根据控制目标和修正后的理想补偿网络算法,计算出系统电压不对称时所需的补偿导纳值。通过算例、仿真分析及实验验证,证明了所提无功补偿导纳计算方法的合理性和正确性,该方法具有计算简单、便于实现的优点。
In order to make a better compensation for the three-phase unbalanced load,the unbalanced load was analyzed and a method of reactive compensation admittance calculation based on balance component method was proposed.Any neutral non-grounded three-phase load can be decomposed into a group of balanced load and single line load,and the load compensation admittance can be obtained by the decomposition of the three-phase unbalance load.The load compensation admittance calculation can be divided into three parts,the power factor compensation for the balanced load and the single line load together with the balanced compensation for the single line resistive load.Then,the ideal Steinmetz compensation network algorithm was amended under the condition of asymmetric voltage.A freedom degree existed in this case,and the asymmetry voltage compensation admittance can be accurately calculated according to the control objectives and the revised ideal compensation network calculation method.The rationality and validity of the method was verified using example and simulation.Compared with existing methods,the proposed method has easy calculation and convenient realization.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2012年第34期98-104,15,共7页
Proceedings of the CSEE
基金
国际科技合作计划(2010RR0002)
黑龙江省科技厅项目(01314025)~~
关键词
电力系统
平衡分量法
静止无功补偿
不平衡电路
平衡化补偿
power system
balanced component method
static var compensator（SVC）
unbalance circuit
balancing compensation
