基于HEM灵敏度的配电网分层分区电压调节策略

doi:10.12204/j.issn.1000-7229.2022.11.005

电力建设 ›› 2022, Vol. 43 ›› Issue (11): 42-52.doi: 10.12204/j.issn.1000-7229.2022.11.005

• 新型电力系统下配电网规划与运行优化关键技术研究及应用·栏目主持王守相教授、赵倩宇博士· • 上一篇下一篇

基于HEM灵敏度的配电网分层分区电压调节策略

陈文进¹(), 甘雯²(), 张俊¹(), 杨萌³(), 孙龙祥²(), 刘皓明³()

1.国网浙江省电力有限公司,杭州市 310007
2.国网浙江省电力有限公司湖州供电公司,浙江省湖州市 313001
3.河海大学能源与电气学院,南京市 211100

收稿日期:2022-04-18 出版日期:2022-11-01 发布日期:2022-11-03
通讯作者: 甘雯 E-mail:605714917@qq.com;94236589@qq.com;zhang-jun@zj.sgcc.com.cn;15850696216@163.com;1542854907@qq.com;liuhaom@hhu.edu.cn
作者简介:陈文进(1975),男,硕士,高级工程师,主要研究方向为电力系统、新能源,E-mail: 605714917@qq.com;
张俊(1981),男,博士,高级工程师,主要研究方向为电力系统调度运行,E-mail: zhang-jun@zj.sgcc.com.cn;
杨萌(1975),女,硕士研究生,主要研究方向为智能配电网建模与控制,E-mail: 15850696216@163.com;
孙龙祥(1992),男,本科,工程师,主要研究方向为电力系统调度运行,E-mail: 1542854907@qq.com;
刘皓明(1977),男,博士,教授,主要研究方向为智能电网、电力系统优化运行和电力市场,E-mail: liuhaom@hhu.edu.cn。
基金资助:
国网浙江省电力有限公司科技项目“多元融合高弹性电网智慧调度平台关键技术研究及应用”(5211UZ2000K4)

Divisional and Hierarchical Voltage Regulation Strategy Based on HEM Sensitivity for Distribution Network

CHEN Wenjin¹(), GAN Wen²(), ZHANG Jun¹(), YANG Meng³(), SUN Longxiang²(), LIU Haoming³()

1. State Grid Zhejiang Electric Power Company, Hangzhou 310007, China
2. State Grid Huzhou Electric Power Supply Company, Huzhou 313001, Zhejiang Province, China
3. College of Energy and Electrical Engineering,Hohai University, Nanjing 211100, China

Received:2022-04-18 Online:2022-11-01 Published:2022-11-03
Contact: GAN Wen E-mail:605714917@qq.com;94236589@qq.com;zhang-jun@zj.sgcc.com.cn;15850696216@163.com;1542854907@qq.com;liuhaom@hhu.edu.cn
Supported by:
State Grid Zhejiang Electric Power Co., Ltd. Research Program(5211UZ2000K4)

摘要/Abstract

摘要：

针对光伏接入后潮流倒送和出力波动带来的电压越限问题,提出一种基于全纯嵌入法(holomorphic embedding method, HEM)灵敏度分析的光储参与配电网分层分区电压调节方法。首先,建立储能和光伏的无功出力模型,并推导出基于HEM的配电网电压灵敏度矩阵,根据灵敏度矩阵运用聚类对配电网进行分区。然后,建立上层电压优化模型,通过全局和分区优化协调调度并网储能、光伏电站与无功调压设备对节点电压和网损进行优化;下层电压调节模型进一步挖掘并网小型分布式光伏及储能的无功能力,基于所得电压灵敏度对各区内越限节点的电压进行调节。最后,应用于某省35 kV的配电网实际系统,验证了所提灵敏度计算方法能够提高电压灵敏度的计算效率以及所提分层分区调压策略能够较好地改善光伏并网后电压越限问题。

关键词: 全纯嵌入法(HEM), 电压灵敏度, 配电网分区, 电压调节

Abstract:

With the increasing integration of PV, the peak and valley of the source and the load are inconsistent in the distribution networks, and the PV generation is intermittent and fluctuating. These characteristics have brought about the problem of overvoltage. This paper proposes a divisional and hierarchical voltage regulation model based on the sensitivity analysis of holomorphic embedding method (HEM). First, the reactive-power output model for energy storage and PV are established, and the voltage sensitivity matrix of distribution network based on HEM is derived. A network partition method is further studied using sensitivity matrix. Then, a two-layer voltage optimization strategy is proposed. The upper-level model dispatches the grid-connected energy storage, PV and volt-var regulating equipment to regulate the voltage in the entire network. The lower-level voltage regulation model further explores the reactive power potential of small grid-connected distributed PV and energy storage to adjust the voltage in each region according to the voltage sensitivity. Finally, the proposed strategy is simulated on a 35kV distribution network. The simulation verified that the proposed sensitivity calculation method is applicable and the voltage regulation strategy is efficient in solving the voltage problem.

Key words: holomorphic embedding method (HEM), voltage sensitivity, distribution network partition, voltage regulation

中图分类号:

TM732

陈文进, 甘雯, 张俊, 杨萌, 孙龙祥, 刘皓明. 基于HEM灵敏度的配电网分层分区电压调节策略[J]. 电力建设, 2022, 43(11): 42-52.

CHEN Wenjin, GAN Wen, ZHANG Jun, YANG Meng, SUN Longxiang, LIU Haoming. Divisional and Hierarchical Voltage Regulation Strategy Based on HEM Sensitivity for Distribution Network[J]. ELECTRIC POWER CONSTRUCTION, 2022, 43(11): 42-52.

图/表 16

图1 储能电站出力特性图

Fig.1 Output characteristic diagram of energy storage

图2 光伏出力特性图

Fig.2 Characteristic diagram of photovoltaic output

图3 双层电压调节策略架构

Fig.3 Architecture of two-layer voltage regulation strategy

图4 某35 kV变电区域地理位置接线图

Fig.4 Wiring diagram of a 35 kV substation area

图5 某35 kV变电区域等效网络拓扑

Fig.5 Topology of a 35 kV substation area network

表1 光伏接入容量及节点

Table 1 PV access capacity and nodes

表2 储能接入容量及节点

Table 2 Stored energy access capacity and nodes

表3 无功调压设备接入容量及节点

Table 3 Reactive-power regulating equipment access capacity and nodes

图6 节点97光伏出力及负荷变化曲线

Fig.6 Curve of photovoltaic output and load in node 97

表4 HEM法和常规法用时及误差对比

Table 4 Comparison of time and error between HEM method and conventional method

表5 区域内节点耦合度及无功匹配程度值

Table 5 Coupling degree of nodes and matching degree of reactive power in the region

表6 分区数为5时电网的分区结果

Table 6 Grid partition result when the number of partitions is 5

图7 不同权重系数下网损和电压情况

Fig.7 Power loss and voltage deviation under different weight coefficients

图8 两个典型时刻网络电压分布情况

Fig.8 Network voltage distribution at two typical moments

图9 两典型节点全天电压分布情况

Fig.9 Voltage distribution of the two typical nodes throughout the day

图10 某时段节点53电压分布情况

Fig.10 Voltage distribution at node 53 throughout the day

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基于HEM灵敏度的配电网分层分区电压调节策略

Divisional and Hierarchical Voltage Regulation Strategy Based on HEM Sensitivity for Distribution Network

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