电气工程学报 ›› 2022, Vol. 17 ›› Issue (3): 177-183.doi: 10.11985/2022.03.021

• 电力系统 • 上一篇    下一篇

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计及线路调压器的光伏高渗透率配电网电压控制策略

冯雪(), 党东升(), 张坤(), 田星(), 屈高强()   

  1. 国网宁夏电力有限公司经济技术研究院 银川 750000
  • 收稿日期:2021-08-06 修回日期:2022-03-22 出版日期:2022-09-25 发布日期:2022-10-28
  • 作者简介:冯雪,女,1989年生,工程师。主要研究方向为新能源接入与消纳。E-mail: F_xue1989@163.com
    党东升,男,1982年生,硕士,经济师。主要研究方向为能源战略与电力市场。E-mail: DS_Dang@126.com
    张坤,女,1992年生,硕士,助理工程师。主要研究方向为电力市场分析预测。E-mail: 1985303682@qq.com
    田星,男,1985年生,高级工程师。主要研究方向为配电网规划设计与电力市场分析。E-mail: Tianxing@163.com
    屈高强,男,1983年生,高级工程师。主要研究方向为新能源接入与消纳。E-mail: QUGQ83@163.com

Voltage Control Strategy for Distribution Network with Photovoltaic High-penetration Considering Step Voltage Regulator

FENG Xue(), DANG Dongsheng(), ZHANG Kun(), TIAN Xing(), QU Gaoqiang()   

  1. Economic and Technological Research Institute, State Grid Ningxia Electric Power Supply Company, Yinchuan 750000
  • Received:2021-08-06 Revised:2022-03-22 Online:2022-09-25 Published:2022-10-28

摘要:

针对线路调压器模型引入的非凸性导致分布式算法无法收敛的问题,提出一种结合交替方向乘子法和分支定界算法的光伏高渗透率配电网分布式电压控制策略。首先,依据线路调压器位置将配电网划分为多个集群,各集群以经济性最优为目标消除内部电压越限,得到局部最优调度方案;其次,相邻集群交换边界信息,利用交替方向乘子法进行集群间协调优化,通过不断迭代得到满足全局约束的调度方案;再次,针对线路调压器引入的非线性整数等式约束,基于分支定界法将其松弛为线性不等式约束,得到线路调压器最优档位;最后,利用改进的IEEE 33节点配电网验证了所提电压控制策略能够充分发挥线路调压器的优势,有效解决配电网电压越限问题,促进分布式光伏消纳。

关键词: 配电网, 线路调压器, 分布式电压控制, 交替方向乘子法, 分支定界算法

Abstract:

Aiming at the problem that the non-convexity introduced by the step voltage regulator model causes the distributed algorithm to fail to converge, a distributed voltage control strategy for photovoltaic high-penetration distribution network combining alternating direction multiplier method and branch and bound algorithm is proposed. Firstly, the distribution network is divided into multiple clusters according to the position of the step voltage regulators. Each cluster aims to optimize the economy to eliminate the internal voltage violation and obtain a local optimal scheduling scheme. Secondly, adjacent clusters exchange boundary information, the alternating direction multiplier method is used to coordinate and optimize the clusters, and the scheduling scheme that meets the global constraints is obtained through continuous iterations. Thirdly, the nonlinear integer equality constraints introduced by the step voltage regulators is slack to linear inequality constraints based on the branch and bound method to obtain the optimal gear of the step voltage regulators. Finally, the improved IEEE 33 node distribution network is used to verify that the proposed voltage control strategy can give full play to the advantages of step voltage regulator, effectively solve the problem of distribution network voltage over-limit and promote distributed photovoltaic consumption.

Key words: Distribution network, step voltage regulator, distributed voltage control, alternating direction multiplier method, branch and bound method

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