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Comprehensive fault control method for polymorphic power quality management device

A power quality and comprehensive control technology, applied in the direction of circuit devices, emergency protection circuit devices, electrical components, etc., can solve the problem that the system control strategy control method has not been optimized and improved, so as to prevent device overload, protect safety, and protect equipment safety Effect

Active Publication Date: 2019-03-29
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, at home and abroad, the same-level bypass technology and neutral point drift technology are mainly used to deal with power unit faults at home and abroad. These are only used to deal with the hardware of the faulty power unit. There is no optimization and improvement

Method used

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  • Comprehensive fault control method for polymorphic power quality management device
  • Comprehensive fault control method for polymorphic power quality management device
  • Comprehensive fault control method for polymorphic power quality management device

Examples

Experimental program
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Embodiment

[0038] In this example, if figure 2 As shown, a multi-state power quality management device mainly includes: overvoltage protection device, input switch cabinet, 10kV / 380V step-down transformer, soft charging device, phase-shifting transformer, 3*n power unit modules, grounding resistor, bypass Composed of pass switch cabinet and output switch cabinet.

[0039] Among them, the output terminal of the overvoltage protection device is respectively connected with the input switchgear, 10kV / 380V step-down transformer and bypass switchgear; the input switchgear is connected with the 10kV winding of the phase-shifting transformer; the 10kV / 380V step-down transformer is connected with the soft charging device; The soft charging device is connected to the tertiary winding of the phase-shifting transformer; the bypass switch cabinet is connected to the output switch cabinet; 3*n sets of 690V secondary windings of the phase-shifting transformer are connected to the three-phase input sid...

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Abstract

The invention discloses a comprehensive fault control method for a polymorphic power quality management device, which includes the following steps: a controller detects the DC bus voltage of a power unit, the terminal voltage of the energy storage battery group of the power unit, the output current of the power quality management device and the fault marker information of the power unit controllerto determine whether the polymorphic power quality management device fails or not; and layered and graded processing is carried out according to different types of faults. Thus, stable and reliable operation of the power quality comprehensive management device is realized.

Description

technical field [0001] The invention belongs to the technical field of power electronic control, and more specifically, relates to a comprehensive fault control method of a multi-state power quality control device. Background technique [0002] The power quality comprehensive control device based on H-bridge power unit cascading technology, the higher the control voltage level, the more the number of power units, and the system or some power units may fail during the actual operation of the device. At present, at home and abroad, the same-level bypass technology and neutral point drift technology are mainly used to deal with power unit faults at home and abroad. These are only used to deal with the hardware of the faulty power unit. There is no optimization and improvement on it. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a comprehensive fault control method for a multi-state power q...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02H7/00
CPCH02H7/00H02J3/00
Inventor 万承宽邹见效汤浩
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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