Motor soft start and dynamic reactive power compensation method

A technology of static reactive power compensation and compensation method, applied in reactive power compensation, motor generator/starter, reactive power adjustment/elimination/compensation, etc., can solve the problem of high cost, achieve large torque and small starting current , Fast and accurate tracking of device cost effects

Inactive Publication Date: 2012-06-27
BEIHAI SHENLAN SCI & TECH DEV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for motor soft start and dynamic reactive power compensation, so as to overcome the disadvantages of the current type of devices that achieve the same effect, but the cost is high

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  • Motor soft start and dynamic reactive power compensation method
  • Motor soft start and dynamic reactive power compensation method
  • Motor soft start and dynamic reactive power compensation method

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specific Embodiment approach

[0017] The specific embodiment of the present invention: the soft start of the motor and the dynamic reactive power compensation are combined together, and a group of fully controlled devices are used together; the reactive power compensation is composed of two parts: dynamic reactive power compensation and static reactive power compensation; the soft start It consists of three parts: rectifier module, filter circuit and inverter module; through the set controller and signal detection module, the inverter module is controlled to realize frequency conversion and voltage regulation output, so that the soft start of the motor can meet the requirements of small current and large torque; During dynamic reactive power compensation, the rectifier module is removed, and then the fully-controlled device is controlled according to the reactive power to realize dynamic reactive power compensation; the power switch is used to control the input or removal of a set of fixed capacitors to real...

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Abstract

The invention discloses a motor soft start and dynamic reactive power compensation method which is characterized in that soft start and dynamic reactive power compensation of a motor are combined to share a full-control device; the reactive power compensation consists of dynamic reactive power compensation and static reactive power compensation; the soft start consists of a rectification module, a filter circuit and an inverter module; through a controller and a signal detection module, the inverter module is controlled to realize frequency-conversion voltage-regulation output, so that the soft start of the motor can achieve the requirements of small current and large torque; during the dynamic reactive power compensation, the rectification module is removed, and the full-control device is controlled to realize the dynamic reactive power compensation according to the reactive power condition; and the investment or removal of a fixed capacitance is controlled by utilizing a power switch, the static reactive power compensation is realized. The method provided by the invention has the advantages of small start current, large torque, safety and reliability in start, rapid reactive power compensation and accuracy in tracking, and the whole device cost is reduced.

Description

technical field [0001] The invention relates to the technical field of motor soft start and dynamic reactive power compensation control, in particular to the design of a motor soft start and dynamic reactive power compensation method. Background technique [0002] In practical applications, the reactive power of the motor is compensated on the spot, and most of them use capacitors to compensate in stages, that is, there are only several levels such as heavy load and light load, and it cannot track the load change to achieve dynamic compensation. While most motors are running, the load changes all the time. In order to improve the power factor of the motor, reduce the impact of motor operation on the power grid, reduce line loss, and achieve energy-saving effects, it is necessary to perform dynamic reactive power compensation on the motor. [0003] The motor-assisted starting methods currently in use are mainly new electronic soft-start methods, including thyristor AC voltag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P1/26H02J3/18
CPCY02E40/30
Inventor 姚普粮劳永浩韦甘铭黄镜彬林朝光欧世文
Owner BEIHAI SHENLAN SCI & TECH DEV
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