基于电力电子调压器的配电网电压协调控制策略

Voltage Coordinated Control Strategy in Distribution Network Based on Power Electronic Voltage Regulator

针对补偿电容器等传统调压装置在配电网线路电压补偿中存在的调节范围小、速度慢等问题,提出了基于电力电子调压器的稀疏地区配电网线路电压补偿方案,并基于电力电子调压器,设计了电压分层协调控制策略。首先将电力电子调压装置等效为节点功率注入模型,通过粒子群算法优化计算等效节点有功、无功调节量,即节点注入附加功率,再通过附加功率进行潮流计算,确定电力电子调压器补偿电压及相角,实现功率补偿优化计算与潮流计算解耦。在改进的IEEE33节点等效模型系统中进行算例验证,结果证明所提出的策略可有效地减少线路压降,且将功率优化与潮流计算解耦可减小计算复杂性、提高运算精度。

Aiming at the problems of small regulation range and slow speed of traditional voltage regulators such as compensation capacitors in distribution network line voltage compensation,a voltage compensation scheme of distribution network in sparse area was proposed,the voltage hierarchical coordinated control strategy was designed based on power electronic voltage regulator. Firstly,the power electronic voltage regulator was equivalent to the node power injection model. And the active and reactive power regulation quantities of equivalent node was calculated by particle swarm optimization algorithm,that is the additional power was injected into the node. Then,the power flow was calculated by the additional power to decide the compensation voltage and phase angle of the power electronic voltage regulator,the decoupling of power compensation optimization calculation and power flow calculation were realized. In the improved IEEE33 node equivalent model system,an example was given. The results show that the proposed strategy can effectively reduce the line voltage drop,moreover,the decoupling of power optimization and power flow calculation can reduce the calculation complexity and improve the calculation accuracy.