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static var generator

A static var and generator technology, applied in reactive power compensation, reactive power adjustment/elimination/compensation, harmonic reduction devices, etc., can solve problems such as time-consuming and labor-intensive, poor applicability, large volume, etc., and achieve reduction Effects of failure maintenance time and availability improvement

Active Publication Date: 2021-06-22
BEIJING ETECHWIN ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, when a certain power device inside the static var generator fails, the entire static var generator will be out of operation; moreover, the existing static var generator has a large volume, and many components need to be dismantled during maintenance. Parts, connecting busbars and cables can only be maintained, which is time-consuming and labor-intensive, and extremely inconvenient
In addition, the traditional large-capacity static var generator basically has one capacity and one specification, which is poor in applicability

Method used

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Embodiment Construction

[0028] Various example embodiments will now be described more fully with reference to the accompanying drawings, in which some example embodiments are shown.

[0029] Refer below Figure 1 to Figure 9 A static var generator according to an embodiment of the invention is described.

[0030] figure 1 A schematic diagram of a static var generator according to an embodiment of the invention is shown.

[0031] refer to figure 1 , the static var generator according to the embodiment of the present invention includes: a main control board 100 and at least one inverter module 200 .

[0032] Here, at least one inverter module 200 detects the load current and the output current of the static var generator.

[0033] The main control board 100 determines the DC component of the load current and the DC component of the output current according to the load current and the output current of the static var generator, and determines the DC component of the load current, the DC component of...

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Abstract

The present invention provides a static var generator, comprising: a main control board and at least one inverter module, the at least one inverter module detects the load current and the output current of the static var generator; the main The control board determines the DC component of the load current and the DC component of the output current according to the load current and the output current, and determines the DC component of the load current, the DC component of the output current and the output current The AC component of the current generates a driving pulse signal for controlling the at least one inverter module, so that the at least one inverter module outputs a current in phase opposite to the load current. The static var generator of the present invention can simultaneously compensate for reactive power, three-phase unbalance of load current and low-order harmonic current, and can also reduce fault maintenance time and improve availability.

Description

technical field [0001] The present invention generally relates to the technical field of wind power, and more specifically relates to a static var generator. Background technique [0002] During the consumption of AC power through the actual power load, since the power load is not a pure resistive load, it will cause reactive power exchange between the load and the grid end, reducing the effective capacity of the grid; With the increase of load, the harm of harmonics in power grid is becoming more and more serious. With the development of power electronics technology, static var generators (static var generators, SVG) are usually used in low-voltage distribution networks for reactive power compensation and harmonic compensation. Traditional high-power static var generators usually include discrete components of high-power insulated gate bipolar transistors (IGBTs), capacitors and bus bars. [0003] At present, when a certain power device inside the static var generator fai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18H02J3/26H02J3/01
CPCH02J3/01H02J3/1821H02J3/26Y02E40/30Y02E40/40Y02E40/50
Inventor 秦承志刘炳马乐
Owner BEIJING ETECHWIN ELECTRIC