计及负载率的农村10kV配电网最优分段研究

发布时间：2018-05-07 14:03

本文选题：配电线路 + 负载率　；参考：《电力系统保护与控制》2015年19期

【摘要】：在过去对配电线路分段的研究中,大多没有考虑线路的转供能力,认为只要通过分段开关将故障段分离,非故障段的全部负荷可经联络线恢复供电。而在实际运行中,配电网发生故障需要通过联络线转移负荷时,由于线路自身负载率的限制,联络线的转供率通常达不到100%,将出现停电损失。探讨不同负载率下手拉手自环网线路的最优分段情况,提出并建立了线路计及负载率最优分段的可靠性、经济性评估数学模型,利用模型计算分析了不同负载率下线路的最优分段位置及其变化规律。并基于最优分段位置,通过分段数-年总费用曲线法分析得到该接线模式下最优分段数与供电半径、产电比和负载率的关系,为电网建设中最优分段的选择提供有实用价值的参考和借鉴。
[Abstract]:In the past researches on the distribution line segments, most of them did not consider the power transfer ability of the lines. It is considered that as long as the fault section is separated by the segmented switch, the whole load of the non-fault section can be restored through the tie line. But in the actual operation, when the distribution network failure needs to transfer the load through the tie-line, because of the limit of the load rate of the line itself, the conversion rate of the tie-line is usually less than 100, which will lead to the loss of power cut. This paper discusses the optimal segmentation of handheld self-loop network under different load rates, and puts forward and establishes a mathematical model for reliability and economic evaluation of the optimal segment of the line taking into account the load rate. The optimal segmental position and its variation law of different load rates are calculated and analyzed by using the model. Based on the optimal segment position, the relationship between the optimal segment number and the power supply radius, power generation ratio and load rate is obtained by the method of piecewise number-annual total cost curve, and the relationship between the optimal segment number and the power supply radius, the power generation ratio and the load rate is obtained. It provides practical reference and reference for the selection of optimal segment in power grid construction.
【作者单位】：中国农业大学;福建省电力有限公司龙岩供电公司;
【分类号】：TM727.1

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