An AC filter switching system and switching method
An AC filter, power transmission system technology, applied in AC network to reduce harmonics/ripple, emergency treatment AC circuit layout, harmonic reduction device, etc. , It cannot flexibly correspond to the operation mode of the DC transmission system, so as to avoid the large calculation project and make the switching operation more flexible.
Active Publication Date: 2018-09-21
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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[0004] The purpose of the present invention is to provide an AC filter switching system and switching method, which are used to solve the problems of large calculation engineering, large storage space occupied by switching table data, and inability Flexible response to various operating modes of the DC transmission system
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[0036] In order to further illustrate the AC filter switching system and switching method provided by the embodiments of the present invention, a detailed description will be given below in conjunction with the accompanying drawings.
[0037] see figure 1 , the AC filter switching system provided by the embodiment of the present invention includes:
[0038] Each initial harmonic voltage acquisition device 10 connected to the AC busbar 40 of the DC converter station in the high-voltage direct current transmission system, each initial harmonic voltage acquisition device 10 is used when the AC filter 73 is not used in the high-voltage direct current transmission system , to obtain each initial harmonic voltage at the AC bus 40; it should be noted that the above-mentioned HVDC power transmission system includes converters connected at or above two ends by means of a DC line, but is not limited to this HVDC power transmission system .
[0039]The initial distortion rate index acq...
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The invention discloses a switching system and a switching method of an alternating current filter, relates to the technical field of electric energy quality control, and aims to solve the problem of an alternating current filter switching way in a high-voltage direct current power transmission system that calculation engineering is large, switching form data occupies large storage space and various operation ways of the direct current power transmission system cannot be flexibly corresponded. The switching system of the alternating current filter comprises an aberration rate index judgment device, an alternating current filter selection device and an alternating current filter switching indication device, wherein the aberration rate index judgment device is used for judging whether an initial aberration rate index and a target aberration rate index conform to a standard or not; the alternating current filter switching indication device is used for selecting the alternating current filter which is input into the high-voltage direct current power transmission system in an analog manner; the alternating current filter switching indication device is used for indicating the practical switching operation of the alternating current filter according to the judgment result of the aberration rate index judgment device and the selection result of the alternating current filter selection device. The switching system of the alternating current filter is used for switching the alternating current filter into the high-voltage direct current power transmission system.
Description
technical field [0001] The invention relates to the technical field of power quality control, in particular to an AC filter switching system and switching method. Background technique [0002] At present, long-distance power transmission mainly adopts high-voltage direct current transmission technology, which is mostly realized through traditional high-voltage direct current transmission systems, and traditional high-voltage direct current transmission systems will generate a large number of harmonics during the commutation process of the converter. To avoid the influence of harmonics on the AC power system, and to better improve the quality of transmitted power, an AC filter is generally added to the AC busbar of the DC converter station in the HVDC transmission system; moreover, the added AC filter also At the same time, it is used as a reactive power compensation device to compensate the reactive power required for the conversion of the converter station. Since the above...
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IPC IPC(8): H02J3/01
CPCH02J3/001H02J3/01Y02E40/40
Inventor 黄莹辛清明赵晓斌邱伟李凌飞卢毓欣郭龙
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD