摘要
首先针对稀疏地区中低压配电网由于供电半径延长导致的线路末端电能质量问题,提出基于电力电子调压器的直接电压控制策略,该策略结合延时信号消除的锁相环同步方式和比例积分谐振器,能够迅速地改善线路末端低电压以及三相不平衡的电能质量问题,实现线路电压的动态连续补偿;然后在此基础上,进一步推导并验证电力电子调压器装置容量与供电半径的数学关系式,为该装置在工程上的配置提供理论依据;最后,结合稀疏地区配电网实际运行场景,在Matlab/Simulink中搭建电压等级为10 kV的电力电子调压器仿真模型,仿真结果证明所提电力电子调压器直接电压控制策略的有效性以及装置容量与供电半径间的数学关系式的准确性。
The power quality of the middle and low voltage distribution network will deteriorate due to the extension of power supply radius in the sparse areas.To deal with this problem,a direct voltage control strategy based on power electronic voltage regulator is proposed in this paper.The phase-locked loop of delayed signal cancellation and proportional-integral-resonant regulator are employed in this control strategy.And this control strategy quickly improves the power quality for the low and imbalanced voltage at the end of the line,which can dynamically and continuously compensate the line voltage.On this basis,this paper further deduces and verifies the mathematical relationship between the capacity of power electronic voltage regulator and the power supply radius,which provides a theoretical basis for the configuration of device in engineering.Finally,combined with the actual operation condition in the sparse area,a 10-kV power electronic voltage regulator model is developed in Matlab/Simulink.The results demonstrate the effectiveness of the proposed direct voltage control strategy and the accuracy of the mathematical relationship between the device capacity and the power supply radius.
作者
余紫薇
范越
赵建勇
年珩
马丽山
杨森林
于涛
YU Ziwei;FAN Yue;ZHAO Jianyong;NIAN Heng;MA Lishan;YANG Senlin;YU Tao(Zhejiang Provincial Key Laboratory of Electrical Machine Systems, College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China;State Grid Qinghai Electric Power Company, Xining 810000, China;Guoluo Power Supply Company, State Grid Qinghai Electric Power Company, Guoluo 814000, China)
出处
《电力科学与技术学报》
CAS
北大核心
2022年第3期61-69,共9页
Journal of Electric Power Science And Technology
基金
国网青海省电力公司科技项目(228201900G5)。
关键词
电力电子调压器
低电压
三相不平衡
供电半径
power electronic voltage regulator
low voltage
three-phase unbalance
power supply radius