| 引用本文: | 李乃双,郝丽丽,郝思鹏,刘海涛,王昊昊.含分布式电源的配电网电压越限薄弱环节识别方法[J].电力自动化设备,2019,39(4): |
| LI Naishuang,HAO Lili,HAO Sipeng,LIU Haitao,WANG Haohao.Identification method of voltage over-limit weak link in distribution network with distributed generation[J].Electric Power Automation Equipment,2019,39(4): |
|
| 摘要: |
| 提出一种含分布式电源(DG)的配电网电压越限薄弱环节的识别方法。对电压越限原因进行机理分析，确定导致电压越限可能的原因及其电压敏感度；定义压降比系数，提出计及网损的各节点DG/负荷最大准入容量的计算方法；研究将各节点实际接入DG容量归算至馈线末端的方法，并将其与馈线末端的最大准入容量进行比较，识别配电网中易发生电压越限的薄弱节点及越限原因；在MATLAB上搭建IEEE 33节点系统验证所提方法的有效性和正确性。 |
| 关键词: 配电网 分布式电源 电压越限 薄弱环节 电压敏感度 最大准入容量 |
| DOI：10.16081/j.issn.1006-6047.2019.04.006 |
| 分类号:TM711 |
| 基金项目:江苏省配电网智能技术与装备协同创新中心开放基金资助项目(XTCX201709)；江苏省“六大人才高峰”项目(XNY-020)；智能电网保护和运行控制国家重点实验室项目 |
|
| Identification method of voltage over-limit weak link in distribution network with distributed generation |
|
LI Naishuang1, HAO Lili1, HAO Sipeng2, LIU Haitao2, WANG Haohao3
|
|
1.College of Electrical Engineering and Control Science, Nanjing Tech University, Nanjing 211816, China;2.School of Electric Power Engineering, Nanjing Institute of Technology, Nanjing 211167, China;3.State Key Laboratory of Smart Grid Protection and Control, NARI Group Corporation, Nanjing 211106, China
|
| Abstract: |
| An identification method of voltage over-limit weak link in distribution network with DGs(Distributed Generations) is proposed. The mechanism of voltage over-limit is analyzed, and the possible causes of voltage over-limit and their voltage sensitivities are determined. The voltage drop ratio coefficient is defined, and the calculation method for the maximum penetration level of DG/load of each node is proposed considering the network loss. The reduction method of calculating the actual DG capacity of each node to the feeder terminal is studied, whose results are compared with the maximum penetration level of the end of the feeder to identify the vulnerable nodes whose voltages are easily out-of-limit and corresponding reasons. IEEE 33-bus system is built on MATLAB to verify the validity and correctness of the proposed method. |
| Key words: distribution network distributed generation voltage over-limit weak link voltage sensitivity maximum penetration level |
