基于智能软开关的有源配电网供电恢复方法

SOP Based Supply Restoration Method of Active Distribution Networks Using Soft Open Point

智能软开关（soft open point,SOP）是安装于传统联络开关处的电力电子装置,能够快速、准确地控制自身功率流动,改变系统功率分布,进而改善整个配电系统的运行状态。在配电网发生故障并隔离后,SOP可以为失电区域提供有效的电压支撑,提高配电系统的供电恢复能力。首先,对SOP的主要功能和数学模型进行阐述,给出考虑SOP的配电网故障恢复流程;其次,提出基于SOP的有源配电网供电恢复模型,这一模型本质上属于大规模非线性规划模型,采用二阶锥规划方法进行模型转化和求解;最后,在IEEE 33节点测试算例上进行分析验证,得到影响SOP供电恢复能力的因素,并在不同的分布式电源条件下进行对比分析,验证所提模型的正确性和有效性。

Soft open point（SOP） refers to a novel power electronic device installed in active distribution networks（ADNs） to replace the traditional tie switch. The application of SOP will promote the flexibility and resilience of ADNs. Under a fault condition, SOP enables to provide voltage support and helps to expand the scope of power supply for the supply restoration. In this paper, a supply restoration model of active distribution system was established based on SOP, which is essentially a complex nonlinear programming problem. To obtain a high quality solution rapidly and accurately, the second order cone programming was adopted to solve this problem. Then, the modified IEEE 33-node system was used to verify the effectiveness and efficiency of the proposed method.