Analysis method of electromagnetic loop closing and power reversing operation of urban distribution network

Abstract

The invention discloses an analysis method of the electromagnetic loop closing and power reversing operation of an urban distribution network, which comprises the following steps of: (1) selecting a loop closing switch; (2) selecting the source of calculation data; if the calculation data is from off-line data, executing the step (3); and if the calculation data is from real-time data, executing the step (4); (3) acquiring the off-line data from an off-line data base; (4) acquiring the real-time data from a real-time data base; (5) processing the real-time data; (6) generating a calculation model; (7) carrying out load flow calculation before loop closing; (8) calculating impact current at a loop closing point; (9) carrying out load flow calculation for loop closing; (10) obtaining a fixed protection value; (11) safety checking; (12) judging whether the loop closing operation is safe or not, if safe, executing the step (14), otherwise, executing the step (13); (13) generating a loop closing strategy if the loop closing operation is not safe; (14) generating a loop closing operation report; and (15) ending.

Description

technical field [0001] The invention relates to electric power system automation, in particular to an analysis method for an electromagnetic loop closing operation of an urban distribution network. Background technique [0002] Most of the power-down operations of the urban distribution network during normal maintenance and accident handling follow the "cold down" method (that is, short-term power outages for users), which results in negative impacts of user dissatisfaction and complaints, as well as deep contradictions between power outages and power supply tasks. Deeply surrounded by power supply companies. In China, there are few analyzes on the operation of the electromagnetic closing loop of the urban distribution network. Strict rules and regulations are usually used to standardize every link of the electromagnetic closing operation of the urban distribution network, such as calculation, nuclear phase, process, statistics, etc. [0003] However, due to the rapid chang...

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Problems solved by technology

[0003] However, due to the rapid changes in the various modes of the urban distribution network, the frequent switching operations, and the large impact of the main network mode, as well as the large amount of basic data and incomplete load parameters, manual calculations were used in the past before the loop switching operation. Whether the two lines of different power sources have the condition of closing the loop and switching power, there are disadvantages of heavy workload, slow speed, and error-prone

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