Method for controlling automatic operation of standby power by microcomputer of inner bridge and single bus connection

Abstract

The invention belongs to control technology of electric power transmission and distribution, and relates to a method for controlling the automatic operation of standby power by using a microcomputer. The method includes two basic control methods which are the inner bridge connection or single bus sectional connection control method and the single bus connection control method, wherein the inner bridge connection or single bus sectional connection control method comprises the following control processes of: tripping control of a first breaker 1DL, tripping control of a second breaker 2DL, switching-on charge and discharge control of the first breaker 1DL, switching-on control of the first breaker 1DL, switching-on charge and discharge control of the second breaker 2DL, switching-on controlof the second breaker 2DL, switching-on charge and discharge control of a third breaker 3DL, switching-on control of the third breaker 3DL, and abnormal signal control. The method has simple action principle and high reliability, is completely in accordance with the fundamental principle of the automatic operation of the standby power, and is applicable to the one-time main connection of electricpower substations in three forms of inner bridge connection, single bus sectional connection and single bus connection, in the power transmission and distribution network.

Description

technical field [0001] The invention belongs to the control technology of electric power transmission and distribution, and relates to a method for using a microcomputer to control the automatic input of a backup power supply. Background technique [0002] At present, there are two types of automatic input devices for backup power in substations: electromagnetic and microcomputer. The electromagnetic backup power automatic input device needs to control the backup power automatic input process through a large number of relays and other mechanical and electrical devices, which occupies a large space, high equipment cost, troublesome maintenance, and is difficult to realize remote control. The microcomputer-controlled backup power automatic input device controls the automatic input process of the backup power through a microcomputer program, which has low cost and is easy to realize remote control. But the existing microcomputer controls the backup power supply [0003] Most ...

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Problems solved by technology

[0003] Most of the control methods adopted by the automatic input device are designed according to the action flow proposed by people, which do not fully conform to the basic principle of automatic input of the backup power supply. Compared with the electromagnetic equipment, its operation principle is complicated and the operation mode is limited. On the contrary, it loses the advantages that the microcomputer equipment self-injection should have

In particular, the existing microcomputer-controlled backup power automatic input device has poor adaptability when it is connected to a local power plant. Since the protection lock is not separated, when a main transformer fails, the automatic input of the backup power may be completely blocked. , when one line and two substations are running, the whole substation will lose power, so its operational reliability cannot be guaranteed

Although a relatively complete inner bridge wiring scheme is proposed in "A new microcomputer-controlled automatic input method for backup power supply", it has not yet been completed with a logic circuit and adapted to the primary main wiring of the substation of the applied power transmission and distribution network. Technical scheme of backup power automatic input device including inner bridge connection, single-bus section connection and single-bus connection

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