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Variable frequency starting and reactive compensation integrated control device of high-power induction machine

An induction motor and variable frequency starting technology, which is applied to the starter, reactive power compensation, motor generator/starter, etc. of a single multi-phase induction motor, can solve the problems of large starting current, grid voltage drop, frequency drop, etc. The effect of solving excessive inrush current, reducing power consumption and reducing overall power consumption

Inactive Publication Date: 2013-11-20
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the power quality problems such as grid voltage drop and frequency drop due to the large starting current in the motor starting process of the traditional ship electric propulsion system, and to provide a frequency conversion starting and reactive power compensation of high-power induction motors Integrated control device

Method used

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  • Variable frequency starting and reactive compensation integrated control device of high-power induction machine
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  • Variable frequency starting and reactive compensation integrated control device of high-power induction machine

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specific Embodiment approach 1

[0017] Specific implementation mode one: the following combination Figure 1 to Figure 3 Describe this embodiment, the integrated control device for variable frequency starting and reactive power compensation of high-power induction motors described in this embodiment, which includes a main control unit 1, an inverter controller 2, a three-phase rectifier 3, a filter capacitor 4, an inverter Inverter 5, AC filter 6, bus contactor 7, frequency conversion contactor 8, contactor control circuit 10, frequency conversion voltage and current detection unit 11 and ship grid voltage and current detection unit 12;

[0018] Main control unit 1, inverter controller 2, three-phase rectifier 3, filter capacitor 4, inverter 5 and AC filter 6 form a frequency converter;

[0019] The ship power grid is connected to the three-phase power input end of the induction motor through the bus contactor 7;

[0020] The ship power grid is connected to the input end of the three-phase rectifier 3 throu...

specific Embodiment approach 2

[0047] Specific embodiment two: present embodiment is described further to embodiment one, and it also comprises system status display and button control unit 9, the display output of system status display and button control unit 9 and the display output of main control unit 1 and external instruction connected to the input.

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Abstract

The invention discloses a variable frequency starting and reactive compensation integrated control device of a high-power induction machine, belongs to the field of motor control, and aims to solve the problems about power quality such as network voltage drop, frequency reduction and the like due to stronger starting current during a starting process of an electric motor of a traditional ship electric propulsion system. The device comprises a main-control unit, an inverter controller, a three-phase rectifier, a filter capacitor, an inverter, an alternating current filter, a bus contactor, a variable frequency contactor, a contactor control circuit, a variable frequency voltage and current detection unit and a ship power network voltage and current detection unit, wherein the main-control unit, the inverter controller, the three-phase rectifier, the filter capacitor, the inverter and the alternating current filter constitute a frequency converter; and the ship power network is connected with an input end of a three-phase power source of an induction motor through the bus contactor.

Description

technical field [0001] The invention relates to an integrated control device for frequency conversion starting and reactive power compensation of a high-power induction motor, belonging to the field of motor control. Background technique [0002] In the power configuration of the ship electric propulsion system, the entire power supply network can be regarded as a micro-grid power system with limited energy. The proportion of the total capacity of the motor is relatively large. During the starting process of the motor, the large starting current will cause power quality problems such as grid voltage drop and frequency drop. When the high-power induction motor is in normal operation, due to the large excitation current of the induction motor, the grid needs to provide a large reactive power, which directly affects the efficiency of the grid and the generator set. Contents of the invention [0003] The purpose of the present invention is to solve the power quality problems ...

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 赵克孙力吴凤江安群涛王志刚张润松段建东王炜信王帅
Owner HARBIN INST OF TECH
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