含VSC换流器的交直流配网潮流算法

Power Flow Calculation of AC/DC Distribution Network with Voltage Source Converter

随着电力电子技术的发展和应用,直流技术得到了快速发展,交直流网络亦广泛应用于电力系统。建立含电压源型换流器(VSC)交直流配电系统,探讨了VSC换流器损耗及其控制方式,并针对交替迭代法和统一迭代法两种算法的不足,提出了改进交替迭代算法,该算法通过调整交流、直流子系统界限的重新界定,避免了潮流计算迭代的交替,从而大大减少潮流计算量。最后通过改进IEEE 13节点配电系统验证了所提算法的正确性和高效性。

With the extensive development of power electronics,the DC technology has been greatly developed,and the AC/DC network has also gradually applied in the field of power systems.In this paper,a voltage source converter AC/DC power distribution system is established.The loss of VSC converter and its control mode are discussed.Aiming at the shortcomings of alternation iteration method and unified iteration method,an improved alternation iteration method is proposed.The algorithm eliminates the coupling between AC variables and DC variables,the boundaries of AC and DC systems are redefined,thus the alternation of iterations is avoided,thus greatly reducing the amount of power flow calculation.The effectiveness of the algorithm is verified by an improved IEEE 13-node system.