Ultra-high-voltage series compensation device

A series compensation and ultra-high voltage technology, which is applied in circuit devices, emergency protection circuit devices, and emergency protection circuit devices for limiting overcurrent/overvoltage, etc., can solve the problem of prolonging the time interval of series compensation capacitors and the recovery speed of gap insulation performance Reduce and withstand breakdown voltage and other problems, to achieve the effect of shortening the re-investment time, shortening the recovery time, and reducing the difficulty of development
CN104659769AInactive Publication Date: 2015-05-27STATE GRID CORP OF CHINA +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
STATE GRID CORP OF CHINA
Publication Date
2015-05-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides an ultra-high-voltage series compensation device which comprises a series capacitor, a first metal oxide voltage limiter (MOV) and at least two discharge branches, wherein the series capacitor is connected in series with an ultra-high-voltage power transmission line; the first MOV is connected in parallel with two ends of the series capacitor; each discharge branch is connected in parallel with two ends of the series capacitor to form a path of discharge current of the series capacitor. The discharge branches of the series capacitor are added to inhibit discharge current for series compensation, and the addition of the discharge branches is equivalent to the addition of damped inductors, so that the discharge current is reduced. Under the same parameters and voltage of the series capacitor, the amplitude of the discharge current of the series capacitor passing through components such as a spark gap and the damped inductors is reduced. On the ultra-high-voltage power transmission line, the research and development difficulties of the spark gap for series compensation can be lowered, the recovery time of insulation property of the spark gap can be shortened, the reuse time of the series capacitor after fault occurrence can be shortened, and the stability of an ultra-high-voltage power transmission system is improved.
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Description

technical field

[0001] The invention relates to the technical field of transmission line compensation, in particular to an UHV series compensation device. Background technique

[0002] The series compensation device is to connect capacitors in series in the transmission line, and the capacitance compensation of the capacitor is used to compensate the inductance of the transmission line to shorten the equivalent electrical distance of the line, reduce the voltage drop and power angle difference caused by power transmission, and improve the power system. Stability, increase line transmission capacity.

[0003] At present, the series compensation device used in the ultra-high voltage transmission line, the spark gap discharge current does not exceed 120kA, which can meet the requirements of the existing equipment design, test and manufacturing capabilities.

[0004] However, when the voltage rises to the UHV level, the existing research shows that when this structure is adopte...

Claims

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