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基于前推回代法的多供区互联配电网潮流计算
作者:
作者单位:

1.武汉大学电气与自动化学院,湖北省武汉市 430000;2.国网浙江省电力有限公司电力科学研究院,浙江省杭州市 310014

作者简介:

王灿(1996—),男,硕士研究生,主要研究方向:配电网潮流计算和优化。E-mail:2018202070010@whu.edu.cn
孙建军(1975—),男,通信作者,博士,教授,博士生导师,主要研究方向:智能配电网多层规划。E-mail:jjsun@whu.edu.cn
余攀(1995—),男,硕士研究生,主要研究方向:配电网潮流优化。E-mail:pyu@whu.edu.cn

通讯作者:

孙建军(1975—),男,通信作者,博士,教授,博士生导师,主要研究方向:智能配电网多层规划。E-mail:jjsun@whu.edu.cn

基金项目:

国家重点研发计划资助项目(2017YFB0903100);国家电网公司科技项目(521104170043)。


Power Flow Calculation of Interconnected Distribution Network with Multiple Supply Areas Based on Back/Forward Sweep Method
Author:
Affiliation:

1.School of Electrical Engineering and Automation, Wuhan University, Wuhan 430000, China;2.Electric Power Research Institute of State Grid Zhejiang Electric Power Co., Ltd., Hangzhou 310014, China

Fund Project:

This work is supported by National Key R&D Program of China (No. 2017YFB0903100) and State Grid Corporation of China (No. 521104170043).

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    摘要:

    随着柔性多状态开关(SNOP)的出现和应用,现代配电网多电压等级、多平衡节点的供区互联运行模式将成为常态。这将使得配电网出现合环且多环运行,也使得在线优化调度运行成为可能,因此,对于多供区多馈线互联的大规模配电网的潮流计算方法提出了新的需求。文中通过将实际工程中采用SNOP互联合环运行的大规模多平衡节点配电网络,依据每个平衡节点所辐射区域对多环进行拆解,进而实现对配电网的分块处理,然后基于广度优先搜索算法对节点进行分区分层编号,同时,采用改进的前推回代法,针对SNOP的PV运行模式,通过无功分摊法预估PV节点的无功功率初值,再由功率相加法得到PV节点的无功功率变化量,将其转化为前推回代法可处理的PQ节点。最后,通过某地实际396节点配电网的潮流计算结果表明所提方法有效且快速。

    Abstract:

    With the emergence and application of the soft normally open point (SNOP), the operation mode of supply area interconnection of multiple voltage levels and multiple balance nodes will become the normal state in the modern distribution network, which make the operation of integrated ring and multiple rings in distribution network and online optimization scheduling operation possible. Therefore, new requirements are put forward for the power flow calculation method of large-scale distribution network with multiple supply areas and multi-feeder interconnection. In view of this, this paper dismantles multiple rings shaped by SNOP in a large-scale multi-balance bus distribution network in actual engineering project, according to the radiated area of each balance bus. Therefore, the network can be divided into several blocks. The breadth-first search algorithm performs hierarchical layering of buses, and adopts an improved back/forward sweep method. For the PV operation mode of SNOP, the reactive power initial value of the PV bus is estimated by the reactive power sharing method, and then the power addition method is used to obtain the variation of the reactive power. The reactive power addition method converts a PV bus into a PQ bus that can be processed by the back/forward sweep method. Finally, the power flow calculation results of the actual 396-bus distribution network in a certain place show that the adopted method is effective and fast.

    表 1 SNOP1至SNOP4和SNOP6至SNOP9参数Table 1 Parameters of SNOP1 to SNOP4 and SNOP6 to SNOP9
    表 4 2种算法计算时间和最大误差Table 4 Computing time and maximum deviation of two algorithms
    表 2 SNOP5参数Table 2 Parameters of SNOP5
    表 5 各供区有功功率损耗Table 5 Active power loss of each supply area
    图1 SNOP接入位置Fig.1 Access location of SNOP
    图2 B2B-VSC拓扑结构Fig.2 Topological structure of B2B-VSC
    图3 多供区互联配电网结构Fig.3 Structure of multi-supply-area interconnected distribution network
    图4 供区1的3种运行方式电压幅值对比图Fig.4 Comparison of voltage amplitudes in three operation modes of supply area 1
    图5 运行方式3下2种算法对比图Fig.5 Comparison of two algorithms in operation mode 3
    图 多供区互联配电网分区和馈线节点编号流程图Fig. Flow chart of partitions division and buses numbering in multiple supply areas interconnected distribution network
    图 含SNOP多供区互联配电网潮流算法流程图Fig. Flow chart of power flow calculation method for multiple supply areas interconnected distribution network with SNOP
    图 某地396节点配电网Fig. 396-bus distribution network somewhere
    图 供区2的3种运行方式电压幅值对比图Fig. Voltage comparison in three cases of supply area 2
    图 供区3的3种运行方式电压幅值对比图Fig. Voltage comparison in three cases of supply area 3
    图 运行方式1下算法结果对比图Fig. Comparison of two algorithms in Case 1
    图 运行方式2下算法结果对比图Fig. Comparison of two algorithms in Case 2
    表 3 各供区电压偏差Table 3 Voltage deviation of each supply area
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引用本文

王灿,孙建军,余攀,等.基于前推回代法的多供区互联配电网潮流计算[J].电力系统自动化,2020,44(11):95-101. DOI:10.7500/AEPS20190902002.
WANG Can,SUN Jianjun,YU Pan,et al.Power Flow Calculation of Interconnected Distribution Network with Multiple Supply Areas Based on Back/Forward Sweep Method[J].Automation of Electric Power Systems,2020,44(11):95-101. DOI:10.7500/AEPS20190902002.

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  • 收稿日期:2019-09-02
  • 最后修改日期:2019-12-23
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  • 在线发布日期: 2020-05-28
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