A Differential Planning Method for Distribution Networks Considering the Risk of Compound Faults

Abstract

The invention, which belongs to the technical field of power system planning, provides a distribution network differential planning method with consideration of a composite fault risk. The method comprises: according to a climatic condition of a region where a distribution network is located, meteorological protection levels of the region are set; historical failure rates of all lines under all meteorological protection levels are calculated; according to the historical failure rates, composite line failure rate prediction values are planned; candidate distribution network differential planning schemes are formulated; and a comprehensive evaluation system is constructed, all candidate distribution network differential planning schemes are evaluated, and then an candidate distribution network differential planning schemes is selected. According to the distribution network differential planning method, with consideration of influences on the distribution network by composite meteorological disasters, the comprehensive disaster handling capability of the distribution network is enhanced and security operation of the distribution network is guaranteed; on the basis of the composite failure rate economic risk evaluation, a cost and a failure disaster risk are balanced; the planning scheme is evaluated in terms of the failure recovery capability, so that the method has an important practical significance in promoting application and perfection of distribution network planning work; and the distribution network planning efficiency and planning quality can be improved.

Description

technical field [0001] The invention belongs to the technical field of electric power system planning, and in particular relates to a differential planning method for a distribution network considering compound fault risks. Background technique [0002] With the continuous expansion of power grid scale, people have higher and higher requirements for power quality. In recent years, extreme weather disasters have occurred frequently, and the probability of line failure has increased significantly. When a major disaster occurs, it is very important to ensure the safe and stable operation of the distribution network and the continuous power supply of important loads. Traditional distribution network planning determines the optimal planning scheme through load forecasting during the planning period and analysis of the existing grid structure. On the premise of meeting the load requirements and safe and reliable power supply, the construction and operation costs of the distributio...

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Problems solved by technology

[0003] At present, my country's distribution network structure is relatively fragile, and its disaster response capacity is not strong enough. The research on distribution network planning technology for complex meteorological factors is still relatively weak, which cannot reflect the actual situation of disaster response capacity from many aspects, and also lacks effective and feasible methods. Evaluation Planning Method

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