High-capacity double-body high-impedance phase-shifting transformer with additional reactor
A technology of phase-shifting transformers and reactors, applied in the field of power transformers, can solve problems such as limiting short-circuit current and over-current, and achieve the effect of solving over-current, stable operation and high efficiency
Inactive Publication Date: 2021-08-13
BAODING TIANWEI BAOBIAN ELECTRICAL
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Problems solved by technology
[0003] The purpose of the present invention is to provide a large-capacity double-device high-impedance phase-shifting transformer with an additional reactor, through which the phase angle adjustment of the phase-shifting transformer can control the current of each parallel branch of the parallel power system, thereby solving the problem caused by parallel transmission lines. The overcurrent problem caused by the system limits the short-circuit current of the system, making the operation of the power system stable and efficient, and solving the above-mentioned technical problems existing in the prior art
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[0010] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0011] A large-capacity dual high-impedance phase-shifting transformer with additional reactors, including a series transformer oil tank, an excitation transformer oil tank, a series transformer, an excitation transformer, and a resistive on-load tap changer K with a polarity selector KZF1, and There are additional reactors LRC, including LRC1, LRC2 and LRC3; the oil tank of the series transformer is connected with the oil tank of the excitation transformer through pipelines; each phase of the series transformer is composed of a high-voltage coil Lcg and a low-voltage coil Lcd, and the low-voltage coil Lcd of the series transformer is a delta connection , each phase high-voltage coil Lcg of the series transformer has one end S1, S2 and S3 connected to the power supply respectively, and each phase high-voltage coil Lcg of the series transformer is connect...
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The invention relates to a high-capacity double-device high-impedance phase-shifting transformer with an additional reactor, which belongs to the field of power transformers. According to the technical scheme, a series transformer oil tank is communicated with an exciting transformer oil tank through a pipeline; each phase of the series transformer is composed of a high-voltage coil Lcg and a low-voltage coil Lcd, the low-voltage coil Lcd of the series transformer is in delta connection, a tapping leading-out head of a phase-shifting coil LLt of each phase of the exciting transformer is connected with a fixed contact of a resistance-type on-load tap-changer of the phase, and the two ends of the phase-shifting coil LLt of the phase are connected with the positive end and the negative end of a polarity selector KZF1 of the phase. And a moving contact of the polarity selector KZF1 is connected with one end of a low-voltage coil Lcd of a corresponding phase of the series transformer. The current of each parallel branch of the parallel power system can be controlled by adjusting the phase angle of the phase-shifting transformer, so that the problem of overcurrent caused by parallel transmission lines is solved, and the operation of the power system is stable and efficient.
Description
technical field [0001] The invention relates to a high-impedance phase-shifting transformer with a large capacity and dual devices with additional reactors, which is suitable for power adjustment of parallel transmission lines in power systems and can limit the short-circuit current of the system, belonging to the field of power transformers. Background technique [0002] Large-scale power systems require high reliability and high efficiency, and are usually composed of multiple power systems connected in parallel. The reliability and load distribution of each power system are determined by different characteristic parameters of the system, which mainly affects The main factors are line impedance and power factor. The application of phase-shifting transformers in parallel transmission lines greatly improves the reliability of the power system and greatly limits the short-circuit current of the system. The main uses of high-impedance phase-shifting transformers in power syst...
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IPC IPC(8): H01F27/42
CPCH01F27/42
Inventor 李志伟李文平赵翠田丰陈志伟杨哲李程刘力强邸晓丹赵文祥张圆圆程文涛徐兰玉张静刘然
Owner BAODING TIANWEI BAOBIAN ELECTRICAL