Energy-saving outdoor grid current limiting device

A current limiting device, energy-saving technology, applied in circuit devices, emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc. Many other problems, to achieve the effect of convenient installation, high reliability, and fewer work links

Inactive Publication Date: 2010-05-05
STATE GRID CORP OF CHINA +1
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  • Description
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Problems solved by technology

However, the use of large-capacity high-speed switches has some disadvantages. After the large-capacity high-speed switchgear is disconnected, the faulty line is cut off, which brings safety hazards to the stable operation of some loads that cannot be powered off. Moreover, FSR can only be installed indoors and cannot be installed outdoors. in complex environment
There are many domestic cases of eliminating operating loss and voltage reduction of current-limiting reactors, all of which are connected in parallel with a large-capacity high-speed switc

Method used

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  • Energy-saving outdoor grid current limiting device
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  • Energy-saving outdoor grid current limiting device

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Embodiment Construction

[0015] The invention improves the large-capacity high-speed switch to be directly connected in parallel with the current-limiting reactor on the primary side to form an integrated energy-saving outdoor power grid current-limiting device. The new large-capacity high-speed switch divides the primary components of the original high-capacity high-speed switch into each single phase and assembles them in an insulating jacket of appropriate size, leading out the wiring through the flange, which is very convenient for parallel connection with the current-limiting reactor.

[0016] The improved large-capacity high-speed switch has fundamentally changed the protection and control of the original large-capacity high-speed switch in terms of design ideas, and removed the original power supply and protection provided by the substation, and directly performed power supply and measurement on the high-voltage primary side. The integrated design of control and control realizes the function of ...

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Abstract

The invention relates to a current limiting device consisting of a current limiting inductor and a high-capacity and high-speed switch which are connected in parallel, in particular to an energy-saving outdoor grid current limiting device, comprising a current limiting inductor and a high-capacity and high-speed switch which are connected in parallel. The energy-saving outdoor grid current limiting device is characterized in that the high-capacity and high-speed switch comprises a tubular insulating shell (8) both ends of which are sealed and are respectively provided with an upper flange (5) and a lower flange (11), and leading-out terminals are respectively arranged on the upper flange (5) and the lower flange (11); a bridge body (1), a fuse and a non-linear resister (7) are installed in the insulating shell (8) which is also provided with a measuring and control unit (2) consisting of a controller and a current inductor (9). The invention can not only be used in a medium-voltage system, but also have obvious effect on short-circuit current limitation of 110kV and 220kV high-voltage grids.

Description

technical field [0001] The invention relates to a current-limiting device composed of a current-limiting reactor and a large-capacity high-speed switch connected in parallel, in particular to an energy-saving outdoor power grid current-limiting device. Background technique [0002] With the leap-forward development of the State Grid Corporation, the 1000kV UHV demonstration project has been put into operation, and the 750kV UHV AC power grid has begun to take shape. The rapid increase in the installed capacity of the power grid will make the short-circuit current of the power grid increase rapidly, which has appeared or will appear in many areas. The case where a circuit breaker with a large breaking capacity cannot be selected. When the short-circuit current exceeds the maximum breaking capacity of the circuit breaker, it is necessary to limit the short-circuit current by changing the power grid structure and operation mode, such as grid partition operation, electromagnetic...

Claims

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Application Information

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IPC IPC(8): H02H9/02H02H3/08
Inventor 艾绍贵王川黄永宁晋毓斌樊益平朱代忠
Owner STATE GRID CORP OF CHINA
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