低压配电网三相不平衡静止同步补偿器优化控制策略  

Optimization Control Strategy for DSTATCOM in Low-voltage Three-phase Unbalance Distribution Network

作　　者：刘福贵[1] 高春兰[1] 赵建阳[1,2] 

机构地区：[1]河北工业大学电磁场与电器可靠性省部共建重点实验室,天津300130 [2]中国能源建设集团天津电力设计院有限公司,天津300400

出　　处：《电力电容器与无功补偿》2017年第2期58-63,共6页Power Capacitor & Reactive Power Compensation

摘　　要：三相不平衡低压电网中有负序、零序分量以及谐波,导致有功和无功功率波动的电能质量问题。采用动态性能好、谐波含量小的DSTATCOM进行补偿优化控制。用αβ0坐标变换方法,将零序分量分离进行单独补偿控制。基于基波中负序电流引起功率2倍频波动,设置2个独立调节的参数,计算不同控制目标下的参考电流,推导统一控制表达式,并采用粒子群算法优化独立参数,同时抑制有功和无功波动。引入比例谐振控制器控制矢量电流交流分量,在达到与PI调节相同效果时,省去繁琐的dq坐标变换计算,简化控制策略,并给出仿真验证。结果表明三相不平衡时,当限制无功波动在10%内时,有功波动相应减弱16%,验证了本文提出控制方法的可行性及有效性。The power quality problem of active and reactive power is caused by the negative sequence and zero sequence components as well as harmonics in the three-phase unbalanced low voltage grid. Com- pensation optimization control is performed by the DSTATCOM with good dynamic performance and small harmonic contents. Zero sequence components are separated by way of coordinate transformation method for individual compensation control. Two individually adjusted parameters is set based on double frequency fluctuation of power caused by negative sequence current in the fundamental wave so calculate the reference current at different control objective, deduce unified control expression, optimize individual parameter by way of particle swarm optimization and, at the same time, suppress active and reactive power fluctuation. The proportional resonant controller is introduced to control AC component of vector current so to complicate dq coordinate transform calculation and simplify the control strategy when the same result as the PI adjustment is reached. The simulation verification is given. It is shown by the result that in case of three-phase unbalance and when the reactive power limit is within 10% ,the active fluctuation is weaken correspondingly by 16% and the feasibility and effectiveness and the control method proposed in this paper is verified.

关 键 词：三相不平衡 配电网静止同步补偿器(DSTATCOM) 统一参数 零负序分量 功率波动 

分 类 号：TM761.12[电气工程—电力系统及自动化]