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Comprehensive compensating device and method

A technology of comprehensive compensation and compensation capacity, applied in reactive power adjustment/elimination/compensation, flexible AC transmission system, etc., can solve the problems of high cost and small capacity of active power filter, to improve performance and enhance overall safety performance and reliability, good application prospects

Active Publication Date: 2011-05-25
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small capacity and high cost of the active power filter used alone, its popularization and application are greatly limited.

Method used

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  • Comprehensive compensating device and method
  • Comprehensive compensating device and method
  • Comprehensive compensating device and method

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Embodiment Construction

[0023] The harmonic and reactive power comprehensive compensation device combined with the active power filter and TSC of the present invention and its working principle will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0024] like figure 1 , 2 As shown, it includes a detection control unit, a thyristor switching capacitor module and an active power filter respectively connected to the power grid. The switching device connected to the trigger pulse output end of the circuit. Three groups of high-order LC filter branches are adopted, and each branch is connected to the power grid at the side close to the load through the thyristor group of the thyristor switching capacitor module.

[0025] The far right is the non-linear load, and the thyristor switched capacitor module (TSC) is connected in parallel with the power grid near the load side. It can be determined according to filtering and reactive performance requirement...

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Abstract

An integrated compensation device consists of detection control unit, thyristor switched capacitor module connected to power network and active electric power filter. It is featured as calculating out reactive volume required to be compensated onto load by said device according load current and grid voltage as well as object power factor then issuing different switching commands to thyristor switched capacitor module for realizing the switching operation of compensation branch and confirming command signal of compensation current on said filter to make actual output current of said filter track with variation of command signal.

Description

technical field [0001] The invention relates to a harmonic wave and reactive power comprehensive compensation device and method, belonging to the technical field of flexible alternating current transmission. Background technique [0002] With the rapid development of power electronic technology, various power electronic devices have been widely used in power systems, electrified railways, metallurgy, building automation and other fields, making the harmonic pollution of power grids more and more serious. At the same time, these devices will also generate a large amount of reactive power, making the power factor of the grid low. Harmonics in the power grid reduce the efficiency of production, transmission and utilization of electric energy, reduce the service life of electrical equipment, interfere with communication, etc.; reactive power in the power grid will increase equipment capacity, increase line loss, and increase line voltage drop. Therefore, in order to ensure the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18
CPCY02E40/12Y02E40/10
Inventor 王卫安黄燕艳马雅青谭胜武周方圆沈辉张定华段世彦胡晓东
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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