Method for switching pressure plates of automatic standby incoming line input devices with consideration of power plant influence
A self-throwing pressure plate, standby self-throwing technology, applied in electrical components, circuit devices, emergency power supply arrangements, etc., can solve problems such as power grid failures, no consideration of power plant line loads, and inability to ensure the accuracy of simulated standby and self-throwing operations. Guaranteed accuracy and practicability, guaranteed effect of accuracy
Inactive Publication Date: 2016-07-27
DONGFANG ELECTRONICS
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Problems solved by technology
However, if there is a plant line on the bus, then in the event of an equipment failure, the plant line breaker will be tripped, isolating the bus
The switch-on / off method of the backup self-switching board in the prior art does not consider the load of the power plant line, so the accuracy of the simulated backup and automatic switching-on action cannot be guaranteed, and it is easy to cause a wrong strategy of the backup and self-switching board to switch on and off, causing new grid failures
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[0019] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:
[0020] Fault handling of a certain power grid is carried out by using the method of switching on and off of the self-powered voltage board considering the influence of the power plant. The power grid includes such as figure 1 10kV and 35kV power grids and such as figure 2 110kV grid, the method includes the following steps:
[0021] (1) For the standby automatic switching including 10kV and 35kV power plant loads in the working bus, the active and reactive power values of the 10kV and 35kV power plant loads are eliminated when counting the operating power of the standby automatic switching working bus, so as to ensure that the simulated The amount of load transferred from the working bus to the backup power supply side when the standby automatic switching is in operation is consistent with the load transferred when the standby automatic switching is...
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The invention discloses a method for switching pressure plates of automatic standby incoming line input devices with consideration of power plant influence. The method includes steps of (1), rejecting active values and reactive values of 10 kV and 35 kV power plant load for the automatic standby incoming line input devices provided with working busbars with the 10 kV and 35 kV power plant load when operating power of the working busbars of the automatic standby incoming line input devices is counted; (2), respectively adding absolute values of active values and absolute values of reactive values of 110 kV power plant circuits in working busbars of the certain automatic standby incoming line input devices to active values and reactive values of working power sources of the certain automatic standby incoming line input devices for the certain automatic standby incoming line input devices provided with the working busbars with the 110 kV power plant circuits when operating power of working power source sides of the certain automatic standby incoming line input devices is computed. Opposite-end plant stations of the 110 kV power plant circuits are power plants, and the 110 kV power plant circuits do not belong to automatic standby incoming line input device models. The method has the advantages that load of the power plant circuits is taken into consideration ranges when actions of the automatic standby incoming line input devices are simulated, accordingly, the accuracy of simulated actions can be guaranteed, and the power plant circuits at different voltage levels are separately considered.
Description
technical field [0001] The invention relates to a throwing and withdrawing method of a self-prepared throwing pressure plate, which belongs to the field of electric power system automation. Background technique [0002] In the regional power grid, in order to ensure the reliability of power supply, a large number of standby automatic switching devices are usually installed on the side of the 110kV power grid. When a device failure occurs in the power grid, the standby self-switching action can ensure the power supply in the faulty area, but if the new equipment is overloaded after the standby self-switching action, the backup self-switching board that caused the overload needs to be withdrawn. Therefore, the commissioning and withdrawing of standby automatic switching needs to be adjusted in real time according to the operating status of the power grid. [0003] Usually, the power grid model is analyzed by using the online switch-on and withdrawal system of the standby auto...
Claims
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IPC IPC(8): H02J9/02
CPCH02J9/02Y02B70/30Y04S20/20
Inventor 谭大帅潘凯岩戴慧芳王圣坤王玉琴
Owner DONGFANG ELECTRONICS