三相不平衡预计算控制策略

Three-phase Imbalance Control Strategy Based on Precomputation

对于低压配电网中存在的三相不平衡问题,本文提出一种基于预计算算法仿真的三相不平衡控制策略。该算法是根据预计算算法结果,通过变压器出口侧的智能换相终端去控制用户侧的智能换相开关动作,有效避免了智能换相开关频繁换相,提高了换相的可靠性。通过实验,验证了算法的可行性,使三相不平衡线路尽量接近三相平衡状态,减小零序电流,减少配网损耗,使系统能够在更加经济的状态下运行,具有很好的推广应用价值。

To solve the problem of three-phase imbalance in a low-voltage distribution network,a three-phase imbal ance control strategy is proposed based on simulations using the precomputation algorithm.According to the precompu tation result,the actions of an intelligent commutation switch on the user-side is controlled by an intelligent commuta tion terminal on the outlet side of a transformer,thus effectively avoiding frequent switching of the intelligent commuta tion switch and improving the switching reliability.The feasibility of the proposed algorithm was verified by experi ments.Under the novel strategy,the three-phase imbalance line can approach the three-phase balanced state as close as possible,and the zero-sequence current and network loss are reduced,thus enabling the system to operate in a more economical state.Therefore,the proposed algorithm has enormous promotional and application values.