基于SOP有功-无功协同的低压配电网末端电压越限治理  

Terminal Voltage Overlimit Mitigation for Low-voltage Distribution Network Based on Coordinated Active and Reactive Power Control of Soft Open Point

作　　者：周剑桥 张建文[1] 席东民[3] 张傲哲 张伟鹏 蔡旭[1] ZHOU Jianqiao;ZHANG Jianwen;XI Dongmin;ZHANG Aozhe;ZHANG Weipeng;CAI Xu(Key Laboratory of Control of Power Transmission and Conversion,Ministry of Education(Shanghai Jiao Tong University),Shanghai 200240,China;Inner Mongolia Energy Investment Group Co.,Ltd.,Hohhot 010090,China;School of Electrical Engineering,Inner Mongolia University of Technology,Hohhot 010051,China)

机构地区：[1]电力传输与功率变换控制教育部重点实验室(上海交通大学),上海市200240 [2]内蒙古能源发电投资集团有限公司,内蒙古自治区呼和浩特市010090 [3]内蒙古工业大学电力学院,内蒙古自治区呼和浩特市010051

出　　处：《电力系统自动化》2023年第6期110-122,共13页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(52107200);内蒙古自治区科学技术厅项目(2020GG0299);中国南方电网有限责任公司科技项目(GDKJXM20210204)。

摘　　要：分布式电源具有出力波动性,且接入位置分布不均,其高比例、规模化接入低压配电网将引发线路末端电压越限问题,如何充分利用配电一次设备对配电网的调节能力实现快速灵活调压是提升配电网对分布式电源消纳能力的关键。文中基于智能软开关(SOP)构建了柔性互联配电网,并提出一种基于SOP有功-无功协同的调压方案,相比于现有的储能系统有功调压和设备无功调压方案,在同等装置容量下具备最佳的电压调节性能,可大幅提升配电网对分布式电源的消纳能力。由于SOP的有功功率传递会同时影响互联线路电压,依据各馈线末端固有电压水平划分配电网运行模态,有机结合SOP内部储能装置,提出基于SOP多模态协同的调压控制策略,可同时实现互联配电线路的末端电压越限治理,且该方案可灵活推广应用到多端柔性互联场景。通过所搭建的柔性互联配电网仿真模型,验证了所提控制策略的可行性和有效性。The power of distributed generator fluctuates and the distribution in tegration location is uneven. Its high proportion and large-scale integration to the low-voltage distribution network will lead to the problem of voltage overlimit at the end of the feeder,so how to make full use of the regulation capability of the distribution primary equipment to achieve rapid and flexible voltage regulation is the key to improve the accommodation ability of the distribution network to the distributed generators. This paper builds a flexible interconnected distribution network based on soft open point(SOP) and proposes a voltage regulation scheme based on coordinated active and reactive control of SOP, which has the best voltage regulation performance compared to existing reactive-power-based voltage regulation scheme of the energy storage system and active-power-based voltage regulation scheme of equipment, and can significantly increase the capacity of the distribution network to accommodate distributed generators. Since the active power transmission of SOP will affect the voltage of the interconnection line at the same time, the distribution network operation modes are divided according to the inherent voltage level at the end of each feeder, and the internal energy storage device of SOP is organically combined to propose a voltage regulation control strategy based on multi-modal coordination of SOP, which can simultaneously achieve the voltage overlimit mitigation at the end of interconnected distribution lines. This scheme can be flexibly extended to the multi-terminal flexible interconnection scenario. The feasibility and effectiveness of the proposed control strategy are verified by the built simulation model of the flexible interconnected distribution network.

关 键 词：低压配电网 智能软开关 柔性互联 分布式电源消纳 电压越限 多端协同调压 

分 类 号：TM714.2[电气工程—电力系统及自动化]