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Power electronic high-voltage AC breaker

A high-voltage AC and power electronics technology, applied in high-voltage air circuit breakers, high-voltage/high-current switches, circuits, etc., can solve the problems of mechanical and electrical life limitations, long breaking time, accident expansion, etc., and achieve fast and reliable control methods, Effect of avoiding arcing and noise and improving working life

Inactive Publication Date: 2019-07-12
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This application provides a power electronic high-voltage AC circuit breaker to solve the problem that the traditional mechanical circuit breaker cannot provide real-time, flexible, continuous and fast service actions, which may easily expand the accident and destroy the stability of the system; There is arc generation, the contacts are easy to burn, and the breaking time is long, which makes it difficult to meet the quick action requirements of some power users for breaking the fault current; there is noise during operation, and the mechanical and electrical life is limited.

Method used

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Embodiment Construction

[0015] See figure 1 , This application provides a power electronic high-voltage AC circuit breaker, including a first current transformer 1, a second current transformer 2, a contactor 3 and a blocking circuit;

[0016] The first current transformer 1 corresponds to the second current transformer 2. The first current transformer 1 is connected in parallel to the main AC circuit AC through the contactor 3, and the blocking circuit is connected in series to the main AC circuit AC. in;

[0017] The two ends of the second current transformer 2 are connected to the control end of the blocking circuit.

[0018] Specifically, the blocking circuit includes a first one-way thyristor 4 and a second one-way thyristor 5; the first one-way thyristor 4 and the second one-way thyristor 5 conduct in opposite directions And connected in parallel, the two ends of the second current transformer 2 are respectively connected to the control ends of the first one-way SCR 4 and the second one-way SCR 5. ...

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Abstract

The invention provides a power electronic high-voltage AC breaker which comprises a first current transformer, a second current transformer, a contactor and a block-out circuit. The first current transformer corresponds to the second current transformer, is in connected in parallel with a main AC circuit via the contactor, and the block-out circuit is in serial connection to the main AC circuit; and the two ends of the second current transformer are connected with the control end of the block-out circuit. The breaker is turned on / off via control by two silicon controlled rectifiers in reverseparallel direction, a rapid and reliable control manner can be realized, a high-voltage circuit is switched on / off rapidly, arch and noise are avoided, and the service life of the breaker is prolonged.

Description

Technical field [0001] This application relates to the technical field of power distribution equipment, and in particular to a power electronic high-voltage AC circuit breaker. Background technique [0002] The development of modern society puts forward higher requirements on the power system and transmission and distribution technology. How to further improve the stability of the grid and provide users with high-quality power has become the development direction of the power industry. Under this background, a flexible AC transmission system is proposed. , It uses power electronic technology and control theory, through the control of AC transmission system parameters and network structure, reasonable distribution of power and reduction of power loss, to solve the voltage surge, sudden drop and instantaneous power failure caused by the distribution system disturbance All kinds of problems, improve the quality of power supply while improving the stability and reliability of the sys...

Claims

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Application Information

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IPC IPC(8): H01H33/59
CPCH01H33/59
Inventor 彭晶吴盛段雨廷李昊王科谭向宇邓云坤马仪陈宇民耿英三王建华刘志远闫静
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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