220kv standby self-switching method
A technology of self-introduction and self-injection, applied in the electric power field, can solve the problems of reducing the reliability of power supply of the power grid, and the inability of self-introduction of the power grid.
Active Publication Date: 2016-08-24
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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[0004] Based on this, it is necessary to provide a 220kV standby self-switching method for the above-mentioned 220kV standby self-switching method, which cannot be used for the 220kV double-bus double-section bus connection form grid, which will reduce the reliability of the grid power supply.
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[0018] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0019] For the 220kV substation with partition measures, the main wiring forms of the 220kV side are different, and the conventional ones are double busbar with bypass, double busbar, double busbar single section, double busbar double section with double bypass, double section wiring (The simplified wiring diagram is as follows figure 1 As shown) and other forms, under various main wiring forms, the main power supply of the 220kV bus is generally the 220kV line of the station.
[0020] Accordingly, the present invention aims to design and provide a 220kV substation standby automatic switching meth...
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The invention discloses a 220kV backup self-switching method, which includes: judging whether the backup switching device satisfies the line self-switching charging condition or the bus-connection charging condition; if the line self-switching charging condition is met , after charging the standby automatic switching device, it is judged whether the standby automatic switching device satisfies the line automatic switching start condition, if it is satisfied, start the standby automatic switching device, and the standby automatic switching device is automatically switched on the preset line After the delay, send the command to trip the switch of the main supply line, and check whether the switch of the main supply line is in the position within the preset line auto-input waiting delay. In the lower sequence, it is detected whether the cross-section switches of each backup line meet the standby switching condition, and if so, the switch of the standby switching line section that meets the standby automatic switching condition is sequentially closed. The method for implementing the invention can be applied to substations with various wiring modes.
Description
technical field [0001] The invention relates to the field of electric power technology, in particular to a 220kV standby self-switching method. Background technique [0002] With the continuous improvement of the west-to-east power transmission capacity of China Southern Power Grid, the rapid development of power supply and grid construction in the grid, the problem of short-circuit current in the grid has become increasingly serious, and the short-circuit current of 220kV and above substations in the load center area has greatly exceeded the standard. In order to effectively reduce the short-circuit current and optimize the power flow distribution, more and more areas have to adopt the power supply method of de-looping and partitioning. Although the partitioned power supply through substation busbar operation and tie-line hot standby can effectively reduce the power consumption of related sites. The problem of short-circuit current reduces the power supply reliability of th...
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IPC IPC(8): H02J9/04
Inventor 蔡莹王珂李晶刘金生
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD