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A backup power automatic input device

A backup power supply and automatic switch-on technology, applied in circuit devices, emergency power supply arrangements, electrical components, etc., can solve the problem of failure to meet the logic requirements for self-switching of 110KV internal bridge wiring backup, automatic switch-on device misoperation or refusal, and impossibility To solve problems such as self-injection of equipment, to achieve the effect of solving design defects and deficiencies, improving work level, and avoiding protection refusal

Active Publication Date: 2015-10-21
STATE GRID CORP OF CHINA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the wiring method of the voltage transformer PT cannot meet the logical requirements of the backup and automatic switching of the 110KV inner bridge wiring, and it is impossible to realize the function of the backup and automatic switching
If no modification is made, the 110KV standby automatic switching device will malfunction or refuse to operate, causing huge losses to the power grid

Method used

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  • A backup power automatic input device
  • A backup power automatic input device
  • A backup power automatic input device

Examples

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Embodiment Construction

[0017] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0018] Such as Figure 1 to Figure 3 As shown, the backup power automatic input device of the present invention includes the main power supply, the secondary side circuit of the main power voltage transformer PT, the main power circuit breaker 111, the main power bus 110KV-4, the bus tie switch 145, the backup power supply, the backup The secondary side circuit of the power supply voltage transformer PT, the backup power circuit breaker 112 and the backup power bus 110KV-5, the main power is electrically connected to the main power bus 110KV-4 through the main power circuit breaker 111, and the backup power is The power circuit breaker 112 is electrically connected to the backup power bus 110KV-5, the main power bus 110KV-4 is electrically connected to the backup power bus 110KV-5 through a bus tie switch 145, and also includes a double-position...

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Abstract

The invention discloses automatic throw-in equipment of an emergency power supply. Power supply connectors of control ends of starting coils and reset coils of a double-position relay are connected to a secondary-side circuit of a voltage transformer PT of a main power supply and a secondary-side circuit of a voltage transformer PT of the emergency power supply respectively, the secondary-side circuit of the voltage transformer PT of the main power supply is electrically connected with a main power supply bus 110KV-4 through normally-open contacts of a two-position interlocking relay SWJ, the secondary-side circuit of the voltage transformer PT of the emergency power supply is electrically connected with an emergency power supply bus 110KV-5 through normally-open contacts of the two-position interlocking relay SWJ, and a parallel operation mode and a march-past operation mode of 110kV voltage transformers PT are further achieved. The automatic throw-in equipment of the emergency power supply has the advantages of effectively solving design defects of primary equipment, improving operation reliability of a power supply system, preventing major accidents, like protection operation rejection and mal-operation, caused by misoperation, meeting reliable power supply requirements of important users, and improving work levels of the relay protection major.

Description

technical field [0001] The invention relates to the professional technical field of substation operation of electric power system; in particular, it relates to a backup self-injection device that can automatically put the standby power into operation quickly when the common working power is disconnected due to power system failure or other reasons. Background technique [0002] With the increasing modernization of people's production and life in our country, people's demand and dependence on power are also multiplying, and the requirements for power quality are becoming more stringent. The goal of controlling and uninterrupted power supply is moving forward. Some power users especially have more prominent requirements for uninterrupted power supply. Therefore, the mutual switching of various power sources to ensure uninterrupted power supply and high reliability of power supply has become an important part of the protection and control loop in modern power distribution proje...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J9/06
CPCY02B70/30Y04S20/20
Inventor 郭永占吴仕哲张军
Owner STATE GRID CORP OF CHINA
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