MCR (magnetically controlled reactor) soft start and SVC (static VAR compensator) dynamic reactive compensation device as well as soft start and dynamic reactive compensation method

A compensating device and soft start technology, which is applied in the direction of reactive power adjustment/elimination/compensation, motor starter, motor generator/starter, etc., which can solve the problems of high construction cost, large maintenance amount, increased floor space, etc. problems, to achieve low production and operating costs, easy operation and maintenance, and reduce input costs

Inactive Publication Date: 2012-02-15
国船电气(武汉)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there are two main types of SVC dynamic reactive power compensation: one is the TCR phase-controlled reactor SVC, which is characterized by fast response and mature technology, but it cannot get rid of the inherent defects that are difficult to overcome: low reliability and stability, and large maintenance ;Complicated equipment, high cost; bulky, increased floor space, high construction costs

Method used

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  • MCR (magnetically controlled reactor) soft start and SVC (static VAR compensator) dynamic reactive compensation device as well as soft start and dynamic reactive compensation method
  • MCR (magnetically controlled reactor) soft start and SVC (static VAR compensator) dynamic reactive compensation device as well as soft start and dynamic reactive compensation method
  • MCR (magnetically controlled reactor) soft start and SVC (static VAR compensator) dynamic reactive compensation device as well as soft start and dynamic reactive compensation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] As shown in the figure, it is a basic embodiment of an MCR soft start and SVC dynamic reactive power compensation device. MCR soft start and SVC dynamic reactive power compensation device, which consists of an MCR branch 1 and an FC branch 2 and control system 3; MCR branch 1 includes MCR controllable reactor 1.1, magnetic control unit 1.2, and start switching The circuit 1.3 and the operation switching circuit 1.4; the MCR controllable reactor 1.1 is connected in series with the start switching circuit 1.3 and the motor M, and connected in parallel to the grid system bus 6; the operation switching circuit 1.4 is connected in parallel to the grid system bus 6 and Start switching circuit 1.3; magnetron unit 1.2 thyristor connected to MCR controllable reactor 1.1 self-dual winding tap; the control system 3 and the magnetron unit 1.2 optical fiber signal connection control, the control system 3 is also connected with the start switching circuit 1.3. Operation switching circ...

Embodiment 2

[0033] The difference from Example 1 is: image 3 Attached figure 1 , There are 3 motors M. The start switching circuit 1.3 is composed of a switch group, which respectively start three motors M1, M2 and M3. Among them, the switch K2.1 corresponds to the motor M1, the switch K2.2 corresponds to the motor M2, and the switch K2.2 corresponds to the motor M3. Is switch K2.3; the switches of the operation switching circuit 1.4 of the motor M1, the motor M2, and the motor M3 are switch K3.1, switch K3.2, and switch K3.3 respectively; in this embodiment, switches K2 and K3 accept Control system 3 digital control switch and closed high voltage switch.

Embodiment 3

[0035] In the following, the method for soft start and dynamic reactive power compensation using the MCR soft start and SVC dynamic reactive power compensation device of the present invention will be further described in conjunction with the accompanying drawings and embodiments.

[0036] Using the MCR soft start and SVC dynamic reactive power compensation device of the present invention to perform the soft start and dynamic reactive power compensation method, the steps are:

[0037] A. In the starting state of the motor M: the control system 3 controls the closing of the switch 2 corresponding to the start switching circuit 1.3, and the MCR controllable reactor 1.1 in the MCR branch 1 becomes the soft start device of the motor M, realizing the power grid system bus 6 Soft start of one or several motors M;

[0038] B. When the starting state of the motor M ends, when the motor M enters operation: the control system 3 controls the operation switching circuit 1.4 to close the correspon...

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PUM

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Abstract

The invention relates to an MCR (magnetically controlled reactor) soft start and SVC (static VAR compensator) dynamic reactive compensation device as well as a soft start and dynamic reactive compensation method. The device comprises an MCR branch and an FC branch as well as a control system, wherein the MCR branch comprises an MCR, a magnetic control unit and a start switching loop as well as a running switching loop; the MCR is connected with the start switching loop and a motor M in series and is in parallel connection with a network system busbar; a parallel connection bypass of the running switching loop is connected between the grid system busbar and the start switching loop; controlled silicon of the magnetic control unit is connected with an auto winding tap of the MCR; and when the MCR is used as a soft start device of the motor in the process of starting the motor M, and when the motor runs or is idle, the MCR branch and the FC branch are used as dynamic reactive compensation devices. The device and method provided by the invention can be suitable for the soft start of a high-voltage motor and the reactive dynamic adjustment of a network at the same time, and can be used to realize multiple functions and reduce the investment cost of equipment at the same time; and the structure is simple as well as has the advantages of low manufacturing and running cost, simple operational maintenance, good performances, stability and reliability.

Description

Technical field [0001] The present invention involves MCR soft start and SVC dynamic compensation device and soft start and dynamic non -contribution compensation method. It is a high -voltage motor soft start and power grid without contribution.And power grid without contribution. Background technique [0002] AC motor is widely used.In most occasions, the motor does not require speed regulation, but the high -voltage and large capacity motor starts a large impact on the grid, causing voltage fluctuations, other equipment is under voltage, and the operation is adversely affecting production.Life life; large impact on mechanical transmission components, gear box belts and drive loads, resulting in shortening the service life of these components. [0003] At present, the common high -voltage asynchronous motor startup method: stator circuit circuit series electrical antibody, liquid resistance, ordinary saturated electrical antibody, thyristor, etc.Candidine anti -electrical antif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/18H02P1/58
CPCY02E40/10
Inventor 林永魏帅
Owner 国船电气(武汉)有限公司
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