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区分电力业务保护质量的链路故障差异化保护策略
作者:
作者单位:

1.华北电力大学电气与电子工程学院,北京市 102206;2.国网甘肃省电力公司经济技术研究院,甘肃省兰州市 730050;3.上海市智能电网需求响应重点实验室(上海电器科学研究所(集团)有限公司),上海市 200063

作者简介:

祁兵(1965—),男,硕士,教授,主要研究方向:电力节能、自动需求响应相关技术。E-mail:bellqi@sina.com
叶欣(1996—),女,通信作者,硕士研究生,主要研究方向:电力系统通信、需求响应。E-mail:julyyeee@163.com
李彬(1983—),男,博士,副教授,主要研究方向:智能电网信息通信技术。E-mail:direfish@163.com

通讯作者:

叶欣(1996—),女,通信作者,硕士研究生,主要研究方向:电力系统通信、需求响应。E-mail:julyyeee@163.com

基金项目:

中央高校基本科研业务费专项资金资助项目(2019MS004)。


Differential Protection Strategy of Link Fault for Distinguishing Protection Quality of Power Business
Author:
Affiliation:

1.School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China;2.Economics and Technology Research Institute of State Grid Gansu Electric Power Company, Lanzhou 730050, China;3.Shanghai Key Laboratory of Smart Grid Demand Response (Shanghai Electrical Apparatus Research Institute (Group) Co., Ltd.), Shanghai 200063, China

Fund Project:

This work is supported by the Fundamental Research Funds for the Central Universities (No. 2019MS004).

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    摘要:

    随着智能电网和能源互联网的快速发展,电力通信网(EPCN)承载的业务越来越多样。为提高EPCN资源利用率,降低网络风险,保证电力业务的可靠传输,提出了一种区分电力业务保护质量的链路故障差异化保护(DLFDP)策略。首先,基于电力通信业务流特征,分析链路失效风险,对EPCN中业务风险进行建模。其次,根据业务重要度和链路风险度提出了基于服务质量的3类保护模型,考虑负载均衡的影响,将网络中的业务向风险较低的链路上进行疏导,在为高重要度业务分配独立保护路径的基础上,复用P圈来保护高风险链路,同时降低网络的阻塞率和风险。仿真结果表明,DLFDP算法可以更加高效地利用网络资源,降低网络中的业务风险和链路风险,同时降低网络的阻塞率。

    Abstract:

    With the rapid development of the smart grid and the Energy Internet, the services carried by the electric power communication network (EPCN) are becoming more diverse. In order to improve the utilization of EPCN resources, reduce the network risk, and ensure the reliable transmission of power services, this paper proposes a differential protection strategy of link fault (DLFDP) for distinguishing protection quality of power business. Firstly, based on the characteristics of power communication service flow, the failure risk of the link is analyzed, and the business risk in EPCN is modeled. Secondly, based on the importance of the business and the risk of the link, three types of protection models based on service quality are proposed. Considering the impact of load balancing, the services in the network are channeled to the links with lower risk, and the services are allocated for high importance. Based on the independent redundant path, the multiplexed P-cycle protects the high-risk link to simultaneously reduce the network blocking rate and risk. The simulation results show that the DLFDP algorithm can effectively utilize network resources, reduce service risk and link risk in the network, and reduce the network blocking rate.

    表 2 业务高风险链路与保护路径映射关系Table 2 Mapping relationship between high-risk link and corresponding protection paths
    图1 单根光纤中承载不同服务的波长分类Fig.1 Classification of wavelengths carrying different services in a single optical fiber
    图1 单根光纤中承载不同服务的波长分类Fig.1 Classification of wavelengths carrying different services in a single optical fiber
    图2 无保护和专用保护类业务的不同保护方式Fig.2 Different protection modes for unprotected and special protected services
    图3 高风险链路与链路P圈的不同位置关系Fig.3 Different positional relationships between high-risk link and link P-cycle
    图4 链路P圈复用条件分析Fig.4 Reusing condition analysis of link P-cycle
    图5 某市级电力通信网络光缆路由图Fig.5 Optical fiber path diagram of a specified city-level power communication network
    图6 不同业务请求数下各算法的网络业务风险度对比Fig.6 Comparison of network business risk for each algorithm with different numbers of business requests
    图7 不同业务请求数下各算法的网络链路平均风险度对比Fig.7 Comparison of average network business risk for each algorithm with different numbers of business requests
    图8 不同业务请求数下各算法的阻塞率对比Fig.8 Comparison of blocking rate of each algorithm with different traffic loads
    图 DLFDP算法流程图Fig. Flow chart of proposed DLFDP algorithm
    Fig.
    表 1 典型电力业务类型的技术需求Table 1 Technical demands of typical power business types
    表 3 Table 3
    图 不同业务请求数下各算法的资源占用率对比Fig. Comparison of network resource occupied ratio under different traffic loads
    图 3 000和6 000业务请求数下的不同类型保护数Fig. Different types of protection under 3 000 and 6 000 traffic loads
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引用本文

祁兵,叶欣,李彬,等.区分电力业务保护质量的链路故障差异化保护策略[J].电力系统自动化,2020,44(11):181-188. DOI:10.7500/AEPS20190610006.
QI Bing,YE Xin,LI Bin,et al.Differential Protection Strategy of Link Fault for Distinguishing Protection Quality of Power Business[J].Automation of Electric Power Systems,2020,44(11):181-188. DOI:10.7500/AEPS20190610006.

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  • 收稿日期:2019-06-10
  • 最后修改日期:2019-12-14
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  • 在线发布日期: 2020-05-28
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