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Three-phase load balancer of small-power set

A three-phase load and balancer technology, which is applied in the direction of reducing the asymmetry of the multi-phase network, eliminating/reducing the asymmetry of the multi-phase network, etc., can solve the problem of increased unit vibration, increased heat generation of diesel generator windings, and increased failure rate, etc. problems, to achieve the effect of optimizing unit use, improving operation rate and operability, and simple structure

Inactive Publication Date: 2012-06-06
GUANGDONG WESTINPOWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The diesel generator set is allowed to withstand the limit of 25% three-phase unbalanced load. When this limit is exceeded, the heating of the diesel generator winding will increase exponentially, the vibration of the unit will also increase accordingly, and the failure rate will also increase significantly.

Method used

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  • Three-phase load balancer of small-power set
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  • Three-phase load balancer of small-power set

Examples

Experimental program
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Embodiment

[0028] The following is a typical communication base station load to illustrate the working principle of the three-phase load balancer. It is assumed that the communication base station load is composed of a 7.5kW three-phase rectifier and two 2kW single-machine room air conditioners, with a total load of 11.5kW. The selected unit model is Xidian For TM22 unit, its long line power / standby power is 16Kw / 17kW respectively, and the working conditions before connecting to the three-phase load balancer are as follows:

[0029] The load distribution of each phase in 50% time is as follows:

[0030] Phase A 2.5kW+2kW=4.5kW

[0031] Phase B 2.5kW

[0032] Phase C 2.5kW

[0033] The load distribution of each phase in 30% time is as follows:

[0034] Phase A 2.5kW+2kW=4.5kW

[0035] Phase B 2.5kW+2kW=4.5kW

[0036] Phase C 2.5kW

[0037] The load distribution of each phase in 20% time is as follows:

[0038] Phase A 2.5kW

[0039] Phase B 2.5kW

[0040] Phase C 2.5kW

[0041] ...

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Abstract

The invention relates to the power supply equipment technology field, especially to a load balancing device of a small-power generator set. The balancer employs a PLC full-automatic control. Besides, the balancer comprises: a PLC module; a relay output module, which is connected with the PLC module and is used for directly loading a resistance load on a uniphase output that is underloaded by the set by a relay contact; an analog quantity input module, which is connected with the PLC module and is used for converting an analog signal into a digital signal and transmitting the digital signal to the PLC module; a power transducer, which is connected with the analog quantity input module as well as is used for converting a three-phase output signal of a small-power set into an analog signal and transmitting the converted analog signal to the analog quantity input module; and a relay, which is connected with the relay output module. According to the invention, a PLC full-automatic control is employed to carry out load distribution, thereby realizing three-phase load balancing of a set. Besides, the balance has advantages of simple structure, scientific and reasonable performance, low investment cost, and simple operation. Moreover, an operation ratio of equipment of the set is improved.

Description

Technical field: [0001] The invention relates to the technical field of power supply equipment, in particular to a load balancing device of a small-power generating set. Background technique: [0002] With the development of modern science and technology, the diversification of load forms has a certain impact on power quality, and the requirements of various equipment for power quality are getting higher and higher, and this contradiction is becoming more and more obvious. The diesel generator set is allowed to withstand the limit of 25% three-phase unbalanced load. When this limit is exceeded, the heating of the diesel generator winding will increase exponentially, the vibration of the unit will also increase accordingly, and the failure rate will also increase significantly. . Under this background, the applicant adheres to the spirit of research, innovation and excellence, and uses his professional vision and professional knowledge to develop a three-phase load balancer ...

Claims

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Application Information

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IPC IPC(8): H02J3/26
CPCY02E40/50
Inventor 徐文捷陈基文张浴凯郑俊华
Owner GUANGDONG WESTINPOWER CO LTD