A method and system for optimizing the input of a backup power automatic input device

Abstract

The invention provides an optimized input method of a backup power automatic input device, which includes obtaining the bus voltage and incoming current, the on-off status of the incoming switch and the bus-coupled section switch; comparing the bus voltage and the bus incoming current, traversing In combination with the status of each switch, the preset load of each bus and the preset power supply capacity of each substation, determine the backup status of the bus that has not failed and the corresponding load margin; control the incoming line of the bus that has failed The switch is delayed and tripped, and the number of backup power sources for the power-off bus and the backup power supply are determined; it is detected whether there is a power-off bus that bids for the same backup power source, and combined with the number of backup power sources, the load margin of the backup power source and the preset load of the power-off bus, set The backup investment plan optimizes the input of the corresponding bus tie section switch. The implementation of the present invention is suitable for the optimization and cooperation of bus multi-section complex wiring scenarios, and can also avoid the potential risk of expanding the scope of power supply interruption caused by multiple bus sections backed up to the same backup power supply.

Description

Optimal input method and system for automatic input device of backup power supply technical field The present invention relates to the technical field of automatic switching of power system backup power supply, in particular to a kind of automatic switching of backup power supply The optimal input method and system of the input device. Background technique [0002] With the development of social economy, the demand for electricity in cities is increasing, and the requirements for the reliability of power supply are increasing day by day. The standby self-switching device can realize that after the working power supply is disconnected due to failure or other reasons, the standby power supply can be automatically and quickly put into work. Resuming power supply to users as soon as possible is an important means for the power sector to ensure continuous and reliable power supply for users. widely used. [0003] As shown in Figure 1, in the power grid where the substation ...

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Problems solved by technology

In addition, since two adjacent sections of busbars are backup objects for each other, it may lead to bidding for the same backup power supply when two sections of busbars lose power at the same time. Reliability of power supply after backup

[0004] However, the existing standby automatic switching device cannot meet the optimization action and coordination of complex multi-section bus main and standby power switchover

In view of the above problems, the current research work mainly includes: For example, Mo Xiaofeng, Liu Xihai and other scholars have proposed a multi-section busbar automatic switching backup power selection idea (discussion on the multi-section 10kV busbar backup automatic switching scheme [J]. Jiangxi Electric Power Journal of Vocational and Technical College, 2005 (03): 34-35.), but only by judging whether the backup power supply meets the load demand, it does not further optimize the selection of the backup power supply, nor does it consider the problem of power-off bus bidding; and for example, Zhao Yuyang proposed an action logic for multi-section bus backup and automatic switching (the action logic for backup and automatic switching of the 10kV substation power system of Dagangshan Hydropower Station[J]. Hydroelectric Power Generation, 2015,41(07):81-84.), but It is only aimed at specific hydropower stations, not universal, and adopts the method of fixed standby and automatic commissioning, without realizing the optimization action of standby and automatic commissioning

[0005] To sum up, it can be seen that the current research on standby automatic switching adapting to the complex wiring of multi-section busbars is not perfect, and the method has many defects

Therefore, there is an urgent need for an optimized input method for the backup power automatic input device suitable for multi-section busbar complex wiring, which can not only meet the optimization action and coordination of complex multi-section bus master and backup power switchover, but also reduce the standby power In the event of post-connection load shedding, it avoids the potential risk of expanding the scope of power supply interruption caused by multiple busbars backing up to the same backup power supply, and improves the reliability and continuity of power supply

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