A control method for loop closing operation of distribution lines

Abstract

The invention discloses a loop closing operation control method for a power distribution line. After a main station system judges that loop closing operation needs to be performed, a main station sends a loop closing instruction to an interconnection switch. After a feeder terminal corresponding to the interconnection switch receives the loop closing instruction sent by the main station, firstly, it is determined that the switch is the interconnection switch; then, an FTU of the interconnection switch and FTUs of adjacent switches are in peer-to-peer communication, voltage information of two adjacent switches is acquired, calculation is performed through information of two line voltages capable of being acquired, and another two line voltages of the interconnection switch are obtained; the voltage information on the two sides of the obtained interconnection switch is compared with a loop closing constant value, and whether a current system accords with a loop closing operation condition so that relevant operation can be performed is judged. According to the method, the loop closing condition is confirmed before the interconnection switch is turned on, loop closing correctness of loop closing operation of a power distribution network can be guaranteed, and the phenomenon that loop closing mistaken operation happens when the loop closing operation does not exist is prevented. A point-to-point peer-to-peer communication mode is adopted between terminals, communication time delay is short, and information transmission timeliness can be guaranteed.

Description

technical field [0001] The invention relates to a control method for loop closing operation of a power distribution line. Background technique [0002] With the rapid development of distribution network construction, my country's distribution network has basically formed a grid structure of "closed-loop design, open-loop operation", that is, the line can be powered by multiple power sources, and the contact switch is in the position during normal operation. The systems on both sides of the switch operate separately. When load reversal or line maintenance is required, first close the contact switch to close the line, and then open the appropriate section switch, which can avoid short-term power failure of some lines and improve the reliability of power supply. The existing loop closing technology is mainly that the master station performs calculation and analysis based on the grid parameters uploaded by the power distribution terminal, and judges whether the system meets the ...

AI Technical Summary

Problems solved by technology

This method does not mention the link of confirming the loop closing conditions by the feeder terminal before closing, and the premise of its realization is that the terminal can collect all the voltage signals required for calculation, and it cannot adapt to only one voltage transformer on each side of the feeder switch. , can collect the actual situation of insufficient voltage signal

[0006] Chinese patent 201310156849.3 discloses a method, device and power distribution terminal for power distribution network closing and switching. Controlled by the closed-loop operation of the bus bar, it cannot be used for distribution lines where the terminal can collect insufficient voltage signals

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