Multi-link SVG power module and bypass control method thereof

A technology of power module and bypass control, which is applied in the direction of output power conversion device, reactive power adjustment/elimination/compensation, conversion of AC power input to DC power output, etc., which can solve problems such as complex control loops and prone to interference

Pending Publication Date: 2022-02-25
SHENZHEN HOPEWIND ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Bypassing the faulty module through the bypass switch is the most commonly used bypass method in engineering at present. Once the control system detects that the power unit is faulty, it will immediately issue an instruction to activate the bypass switch, remove the f

Method used

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  • Multi-link SVG power module and bypass control method thereof
  • Multi-link SVG power module and bypass control method thereof

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Experimental program
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Embodiment 1

[0029] see figure 1 , this embodiment discloses a multi-link SVG power module, including an SVG power module and a bypass switch, the SVG power module is connected to a controller of a complete set of SVG devices, and the SVG power module is invertered by several H bridges The units are connected in series, and several H-bridge inverter units are integrated and installed in one frame of the SVG power module; the main contact of the bypass switch is connected in parallel with the output end of the SVG power module; the SVG power Only one H-bridge inverter unit in the module is connected to the closing coil of the bypass switch.

[0030] Each of the H-bridge inverter units includes an IGBT power module, a drive circuit module, a unit control module and a switching power supply module.

[0031] The IGBT power module is used for power conversion, the drive circuit module is used to provide drive signals to the IGBT power module; the unit control module is used to control the oper...

Embodiment 2

[0036] see figure 2 , the present invention also provides a bypass control method of a multi-chain SVG power module, comprising the following steps:

[0037] Perform fault detection on all multi-link SVG power modules of the complete SVG device;

[0038] When any one of the H-bridge inverter units of the multi-link SVG power module fails, the H-bridge inverter unit uploads fault information to the controller of the complete SVG device;

[0039] The controller of the complete set of SVG device locates the location of the faulty SVG power module and the type of fault, and the controller of the complete set of SVG device sends all H-bridge inverter units in the faulty SVG power module to the location and type of the faulty SVG power module. Simultaneously issue bypass instructions;

[0040] The controller of the complete SVG device controls the H-bridge inverter unit connected to the closing coil of the bypass switch in the faulty SVG power module to control the operation of t...

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PUM

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Abstract

The invention discloses a multi-link SVG power module, which comprises an SVG power module and a bypass switch. The SVG power module is formed by connecting a plurality of H-bridge inversion units in series, and the main contact of the bypass switch is connected with the output end of the SVG power module in parallel; only one H-bridge inversion unit in the SVG power module is connected with a closing coil of the bypass switch; when any H-bridge inversion unit of the multi-link SVG power module has a fault, a controller of the whole set of SVG device controls an H-bridge inversion unit connected with a closing coil of the bypass switch in the fault SVG power module to control the bypass switch to act, so that the whole multi-link SVG power module is bypassed; and according to the multi-link SVG power module, bypass control is carried out on the H-bridge inversion units through the bypass switch, a bypass control loop is greatly simplified, the cost is saved, operation of the SVG device can be rapidly recovered after bypass is carried out on the fault H-bridge inversion unit, and the loss is reduced.

Description

Technical field: [0001] The invention relates to the technical field of static var generators, in particular to a multi-chain SVG power module and a bypass control method thereof. Background technique: [0002] Static Var Generator (Static Var Generator SVG) is an inverter compensation device that uses fully-controlled power electronic devices as switching devices. There are positive implications for power system stability and power transfer capability. [0003] In the SVG system, the cascaded H-bridge structure is usually used. When a power unit module fails, in order to ensure that the fault does not expand further, wave sealing must be performed first. However, the faulty module is not disconnected from the main circuit at this time, and the It will charge the capacitor in the module, and eventually cause the capacitor to be damaged or even explode. Therefore, it is necessary to cut the faulty module from the main circuit through bypass measures to ensure the normal ope...

Claims

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Application Information

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IPC IPC(8): H02J3/18H02M7/5387H02M1/088H02M1/32
CPCH02J3/18H02M7/53871H02M1/088H02M1/32Y02E40/10
Inventor 周党生左冉阳黄晓胡增山梅松林杨煜琦胡子豪雷曾
Owner SHENZHEN HOPEWIND ELECTRIC CO LTD
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