Site optimization method of three-phase unbalanced power switching device

A technology of power switching device and optimization method, which is applied in the direction of circuit device, multi-phase network asymmetry reduction, multi-phase network elimination/reduction of asymmetry, etc., can solve problems such as adverse effects and hazards, and achieve cost reduction and labor saving Material resources, the effect of solving the three-phase imbalance problem

Active Publication Date: 2017-06-30
ELECTRIC POWER SCI RES INST OF GUIZHOU POWER GRID CO LTD
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Problems solved by technology

[0003] The three-phase unbalance problem is a power quality problem, and its unbalance degree has varying degrees of influence on the low-voltage power supply and distribution system, and will cause many hazards and adverse effects on the transformers in the system, electrical equipment and the line loss of the entire system

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  • Site optimization method of three-phase unbalanced power switching device
  • Site optimization method of three-phase unbalanced power switching device
  • Site optimization method of three-phase unbalanced power switching device

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Embodiment Construction

[0028] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the invention.

[0029] Through the analysis of the time characteristics of the three-phase unbalanced load, the overall suppression strategy is proposed, and the layout optimization of the three-phase unbalanced power switching device is studied.

[0030] According to the unbalanced characteristics of the load obtained from the data collected on site, pre-adjust first, then find the remaining key load points (points with large deviation and frequent changes), and finally use the step-by-step optimization method to find the layout adjustment according to the objective function Switching devices are arranged at the point of the switch, and the control time must be preset ...

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Abstract

The invention discloses a site optimization method of a three-phase unbalanced power switching device. The three-phase unbalancing problem in a power system brings about a series of problems of excessively high neutral current, increasing line loss and increasing electric energy loss of a distribution transformer. The problems can be effectively solved by reasonably installing the three-phase unbalanced power switching device. An overall suppression strategy is put forward through time characteristic analysis of the three-phase unbalanced load to perform site optimization of the three-phase unbalanced power switching device. The main characteristics are that the unbalancing characteristics of the load are obtained by using the power data of acquisition points, then the power data of multiple key load points are obtained by the unbalancing characteristics, and the power data are substituted in an objective function and enabled to meet the corresponding constraint conditions so that the optimal site scheme is obtained by using the stepwise optimization method.

Description

technical field [0001] The invention belongs to the field of power system analysis, and relates to power system power flow calculation and step-by-step optimization methods. Background technique [0002] At present, the structure of the distribution network is complex, and the types of power consumption of power users are also diverse. Due to various reasons such as different load types and different power consumption times, serious three-phase imbalances may occur in the distribution transformer area. With the continuous improvement of users' requirements for power quality, the problem of three-phase imbalance in distribution network has become increasingly prominent. [0003] The three-phase unbalance problem is a power quality problem, and its unbalance degree has varying degrees of impact on the low-voltage power supply and distribution system, and will cause many hazards and adverse effects on the transformers in the system, electrical equipment and the line loss of the...

Claims

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Application Information

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IPC IPC(8): H02J3/26
CPCH02J3/26H02J2203/20Y02E40/50
Inventor 王俊融欧家祥杨婧宋强张秋雁张俊玮徐宏伟丛中笑陈建国杨沁晖李鹏程
Owner ELECTRIC POWER SCI RES INST OF GUIZHOU POWER GRID CO LTD
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