低压配电网三相不平衡静止同步补偿器优化控制策略

发布时间：2018-04-14 19:43

本文选题：三相不平衡 + 配电网静止同步补偿器(DSTATCOM)　；参考：《电力电容器与无功补偿》2017年02期

【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。
[Abstract]:There are negative sequence, zero sequence component and harmonics in three-phase unbalanced low-voltage power network, which lead to the power quality problem of active and reactive power fluctuation.DSTATCOM with good dynamic performance and low harmonic content is used to compensate and optimize control.By using 伪尾 0 coordinate transformation method, the zero sequence component is separated and compensated separately.Based on the power frequency fluctuation caused by the negative sequence current in the fundamental wave, two parameters of independent regulation are set up, the reference current under different control objectives is calculated, the unified control expression is derived, and the independent parameters are optimized by particle swarm optimization.At the same time, it can restrain the fluctuation of active and reactive power.The proportional resonance controller is introduced to control the AC component of vector current. When the control effect is the same as that of Pi, the complicated dq coordinate transformation calculation is eliminated, the control strategy is simplified, and the simulation results are given.The results show that when the reactive power fluctuation is limited within 10%, the active power fluctuation decreases by 16 times when the three-phase imbalance is not in balance. The feasibility and effectiveness of the control method proposed in this paper are verified.
【作者单位】：河北工业大学电磁场与电器可靠性省部共建重点实验室;中国能源建设集团天津电力设计院有限公司;
【分类号】：TM761.12

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