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计及多约束的多分布式电源接入配电网最大承载力分段算法
作者:
作者单位:

1.重庆大学电气工程学院,重庆市 400044;2.国网湖北省电力有限公司武汉供电公司,湖北省武汉市 430012;3.重庆星能电气有限公司,重庆市 400039

作者简介:

谭笑(1995—),女,通信作者,硕士研究生,主要研究方向:电力系统规划、运行与可靠性。E-mail:381108932@qq.com
王主丁(1964—),男,教授,IEEE高级会员,主要研究方向:电力系统规划、运行与可靠性。E-mail:348402467@qq.com
李强(1978—),男,高级工程师,主要研究方向:电网规划。E-mail:68302526@qq.com

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Segmentation Algorithm for Maximum Hosting Capacity of Distributed Generator Accessing to Distribution Network Considering Multiple Constraints
Author:
Affiliation:

1.School of Electrical Engineering, Chongqing University, Chongqing 400044, China;2.Wuhan Power Supply Company of State Grid Hubei Electric Power Co., Ltd., Wuhan 430012, China;3.Chongqing Electrical Energy Star Company, Chongqing 400039, China

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    摘要:

    分布式电源(DG)大量并网给电能质量带来风险,评估DG接入配电网的最大承载力对DG规划具有指导意义。建立了多DG接入配电网承载力评估的优化模型:目标为DG并网容量最大,约束涉及电压偏移、电压波动、短路电流和继电保护的相关技术标准。针对该模型,提出了基于约束指标相对于DG容量灵敏度的单约束和多约束协调分段计算方法。基于不同的DG初始值,分段计算可分别采用倒推和顺推2种计算流程进行。最后计算分析了辐射型配电网在多约束多个不同类型DG情况下的系统最大承载力,表明了所提方法在计算精度和效率方面的优越性。

    Abstract:

    The integration of large number of distributed generators (DGs) brings risks to the power quality of the network which they are connected to. Thus it is instructive for DGs planning to evaluate the maximum hosting capacity of DGs accessing to a distribution network. An optimization model for evaluating the hosting capacity of the distribution network with DGs access is established. In the model, the objective is to maximize the grid-connected capacity of DGs, and the constraints involve the technical standards of voltage deviation, voltage fluctuation, short-circuit current and relay protection. Based on the sensitivity of a constraint index to DG capacity, a single-constraint segmentation algorithm and a multi-constraint coordination segmentation algorithm are proposed for the model. Based on different initial values of DG capacities, the segmentation algorithms can be carried out in backward and forward methods, respectively. Finally, the maximum hosting capacity of a radial distribution network is computed and analyzed with multiple constraints, multiple sources and multiple DG types, which shows the superiority of the proposed algorithms in the calculation accuracy and efficiency.

    表 3 DG资源较大情况下的最大承载力Table 3 Maximum hosting capacity with large DG resources
    表 1 线路分区各节点Smax,i及各单约束CH,iTable 1 Smax,i and CH,iwith each constraint of each node in the feeder area
    图1 算例系统单线图Fig.1 Single line diagram of an example system
    图2 DG接入点的电压偏移Fig.2 Voltage deviation at DG accessing point
    图 基于灵敏度的单约束倒推求解流程图Fig. Flow chart of the sensitivity-based single-constraint backward method
    图 各DG接入点的电压波动Fig. Voltage fluctuation values at different DG access locations
    表 4 DG资源适中情况下的最大承载力Table 4 Maximum hosting capacity with medium DG resources
    表 5 多约束协调法和枚举法计算结果与时间对比Table 5 Calculation results and time comparison for multi-constraint coordination method and enumeration method
    表 9 Table 9
    表 7 Table 7
    表 8 Table 8
    表 2 PCC母线短路时各DG提供的最大短路电流Table 2 Maximum short-circuit current from each DG when PCC bus is short-circuit
    表 6 Table 6
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引用本文

谭笑,王主丁,李强,等.计及多约束的多分布式电源接入配电网最大承载力分段算法[J].电力系统自动化,2020,44(4):72-80. DOI:10.7500/AEPS20190610004.
TAN Xiao,WANG Zhuding,LI Qiang,et al.Segmentation Algorithm for Maximum Hosting Capacity of Distributed Generator Accessing to Distribution Network Considering Multiple Constraints[J].Automation of Electric Power Systems,2020,44(4):72-80. DOI:10.7500/AEPS20190610004.

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历史
  • 收稿日期:2019-06-10
  • 最后修改日期:2019-09-17
  • 录用日期:2019-10-07
  • 在线发布日期: 2020-02-27
  • 出版日期: