引用本文: | 孙黎霞,王中一,戴 洪,等.计及网络结构的配电网健康状态评估方法研究[J].电力系统保护与控制,2022,50(4):64-74.[点击复制] |
SUN Lixia,WANG Zhongyi,DAI Hong,et al.The health state assessment method of a smart distribution networkconsidering network structure[J].Power System Protection and Control,2022,50(4):64-74[点击复制] |
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摘要: |
现阶段随着配电网中分布式电源、储能、电动汽车的逐渐增加,配电网的运行工况变得越来越复杂多变。为了准确地判断配电网实时运行状况及健康状态,及时地发现配电网运行中的缺陷问题并制定合理的安全管控措施,提出一种计及网络结构的配电网健康状态评估方法。首先,基于配电设备运行的电气量和非电气量参数进行配电设备健康指数计算,利用成功流法对同一网络中的配电设备健康指数进行等价简化,评估配电设备层的健康状态。然后,从可靠性、安全性、经济性和环保性四个维度实时监测配电网的运行数据建立指标体系,采用模糊层次分析法和证据理论相结合的方法对运行指标进行分析计算,得到网络结构层的健康指数和健康状态。结合配电设备层健康状态和网络结构层健康状态进行综合评估,从而得到配电网的健康指数,判断配电网所处的健康状态。最后,以某10 kV配电网为例进行算例分析,证明所提出的评估方法的有效性和实用性。 |
关键词: 配电网 配电设备层 网络结构层 健康状态评估 模糊层次分析法 证据理论 |
DOI:DOI: 10.19783/j.cnki.pspc.210659 |
投稿时间:2021-06-02修订日期:2021-07-18 |
基金项目:国家自然科学基金项目资助(51707056) |
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The health state assessment method of a smart distribution networkconsidering network structure |
SUN Lixia,WANG Zhongyi,DAI Hong,TIAN Yiyun,CHEN Xinling |
(1. College of Energy and Electrical Engineering, Hohai University, Nanjing 211100, China;
2. Xinxiang Power Supply Company, State Grid Henan Electric Power Company, Xinxiang 453000, China) |
Abstract: |
With the rapid growth in the distribution netwrok of distributed power sources, energy storage and electric vehicles, the operating conditions of the distribution network become more and more complex and variable. This paper proposes a novel approach for the health status assessment of the distribution network including the network structure. The purpose is to accurately determine the real-time operating conditions and health status of the distribution network in order to identify defects in network operation and formulate reasonable safety control measures. First, based on the electrical and non-electrical variable states of the distribution equipment during operation, a health index of the equipment is calculated. The health index of the distribution equipment layer is obtained using the goal-oriented method, which can evaluate the health status of the distribution equipment layer. Then, the four dimension indices of reliability, safety, economy and environmental protection on the real-time operational status of the distribution network are chosen to establish a network structure indicator system. The indicators are modified by introducing a fuzzy analytic hierarchy process and D-S evidence theory to obtain a health index of the network structure layer. This can be used to evaluate the network structure health status. The method comprehensively considers the health index of the distribution equipment and the network structure layers together to evaluate the health status of the distribution network. The data are collected based on a 10 kV distribution network. Simulation analysis is carried out to verify the effectiveness and practicality of the proposed method.
This work is supported by the National Natural Science Foundation of China (No. 51707056). |
Key words: distribution network distribution equipment layer network structure layer health state assessment fuzzy hierarchical analysis method D-S evidence theory |