Static var generator with lightning protection isolation and fire prevention early warning and method

A static reactive power generator technology, which is used in electrical fire alarms, reactive power/actual component measurement, reactive power adjustment/elimination/compensation, etc., to eliminate interference and ensure accurate detection.

Active Publication Date: 2017-08-22
北京英瑞来科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no such method of judging the fault arc by using the change rate of the harmonic content rate

Method used

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  • Static var generator with lightning protection isolation and fire prevention early warning and method
  • Static var generator with lightning protection isolation and fire prevention early warning and method
  • Static var generator with lightning protection isolation and fire prevention early warning and method

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Embodiment Construction

[0053] The specific embodiments provided by the present invention will be described in detail below in conjunction with the accompanying drawings.

[0054] Such as figure 1 As shown, a static var generator with lightning protection isolation and fire warning is a device with functions of ground potential counterattack isolation, fire warning and SVG compensation, including voltage sensors, current sensors, sampling circuits, signal processing circuit, main control MCU, arc fault alarm circuit, switch value isolation output circuit, ground potential counter-attack isolation module, IGBT drive circuit and SVG main circuit.

[0055] Such as figure 2 As shown, the main control MCU is connected to the voltage sensor and the current sensor through the signal processing circuit and the sampling circuit, and the main control MCU respectively performs the arc fault alarm after analyzing the same voltage and current sampling signals through the fault arc analysis and reactive current ...

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PUM

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Abstract

The invention provides a static var generator with lightning protection isolation and fire prevention early warning and a method. The static var generator is a device with functions of ground potential counterattack isolation, fire prevention early warning, and SVG compensation, current detection of a fault arc and current detection of the static var generator are partly shared, the analysis of the fault arc and the calculation of the reactive current are simultaneously conducted through a common main control unit by employing the same detection signal, sampling can be performed by the device before the characteristic current of the fault arc is compensated, and accurate detection of the fault arc is guaranteed; and the detection method of the fault arc employs a determination result of a current difference parameter as the premise, the fault arc is determined by employing a harmonic content ratio change rate, the interference of a non-linear load can be effectively eliminated, determination is performed by simultaneously employing four determination methods, and the fault arc can be accurately detected.

Description

technical field [0001] The invention relates to the technical field of power quality detection and management, in particular to a static var generator and method with lightning protection isolation and fire prevention warning. Background technique [0002] With the continuous development of our country's economy, various electrical equipment required for production and life are increasing. Correspondingly, there are more and more components in the power system, and the working conditions are more complex and changeable, which greatly increases the power system. probability of failure. Arc faults account for a considerable proportion of the causes of electrical fires. Therefore, timely and accurate detection of arc faults plays an important role in ensuring safe production and people's lives. Static var generator (SVG), as a new type of reactive power compensation equipment, has the advantages of fast reactive current adjustment speed, wide operating range, and low harmonic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12G01R19/06H02J3/18G08B17/06
CPCG01R19/06G01R31/12G08B17/06H02J3/1821Y02E40/10
Inventor 袁敞袁洋波李旷
Owner 北京英瑞来科技有限公司
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