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Multi-level topology reactive power compensation device and compensation method with fault-tolerant function

A technology of fault-tolerant function and compensation method, applied in reactive power compensation, output power conversion device, reactive power adjustment/elimination/compensation and other directions, can solve the problem of inability to realize fault-tolerant operation, and achieve improved dynamic response and fast control speed. , the effect of reducing the content of high-order harmonics

Active Publication Date: 2022-05-27
HARBIN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, multilevel converters such as diode-clamped topologies, flying capacitor topologies, and cascaded H-bridge topologies cannot achieve fault-tolerant operation

Method used

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  • Multi-level topology reactive power compensation device and compensation method with fault-tolerant function
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  • Multi-level topology reactive power compensation device and compensation method with fault-tolerant function

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Embodiment Construction

[0070] The embodiments of the present invention are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments may be combined with each other under the condition of no conflict.

[0071] like figure 1 As shown, one aspect of the present invention of this embodiment provides a multi-level topology reactive power compensation device with a fault-tolerant function, including a detection module, a controller, a power converter and an LCL filter, and the controller includes a...

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Abstract

The invention discloses a multi-level topological reactive power compensation device and a compensation method with fault-tolerant functions, and belongs to the field of reactive current compensation and harmonic current suppression in power quality control of power grids. The invention aims at that the existing reactive power compensation device cannot realize good fault-tolerant operation and real-time reactive power compensation and harmonic suppression under the condition of switch tube failure. The invention includes a detection module, a controller and a power converter, and the controller includes an overall voltage equalization control module, an intra-phase voltage equalization control module, a power grid phase-locked loop module, a reactive harmonic current separation module, a quasi-proportional resonance control module and a carrier wave Stack modules. The invention realizes that when the switch tube fails, the system can be operated safely and reliably under the normal operation condition, and the reactive power can be compensated and the harmonic can be suppressed in real time.

Description

technical field [0001] The invention relates to the field of reactive current compensation and harmonic current suppression in power grid power quality control, in particular to a multi-level topology reactive power compensation device compensation method with fault tolerance function. Background technique [0002] With the advancement of power electronic technology, the reactive power and harmonic currents generated by power electronic equipment in daily life and production, such as inverter air conditioners, washing machines, and electric locomotives, have an increasing impact on the power grid. When reactive and harmonic currents flow into the grid, the grid current waveform is distorted and the power factor is reduced. When the power grid contains reactive harmonic currents, it will have a great impact on power electronic equipment. The grid reactive power and harmonic current will also affect the normal operation of power electronic equipment, so compensating reactive ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18H02J3/26H02J3/01H02M7/483H02M1/32
CPCH02J3/1842H02J3/26H02J3/01H02M7/483H02M1/32H02M1/325Y02E40/40Y02E40/30Y02E40/50
Inventor 高晗璎杨宸程喆李志影刘向南
Owner HARBIN UNIV OF SCI & TECH
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