Transformer region low-voltage cause analysis method and system

Abstract

The invention provides a transformer region low-voltage cause analysis method and system. The method comprises the following steps: to begin with, according to collected transformer region network parameters and collected transformer region operation parameters, establishing transformer region network topology and component models thereof; then, calculating a transformer region low-voltage quantitative evaluation index--low-voltage index under the current state through load flow calculation; on the basis of the current state of the transformer region, through a variable parameter method, adjusting various factors closely related to the low voltage gradually till the corresponding indexes return to normal, and calculating transformer region low-voltage indexes when adjusting various factorstill the corresponding indexes return to normal respectively; and calculating the difference values between the transformer region low-voltage indexes obtained when adjusting the various factors tillthe corresponding indexes return to normal and the low-voltage index obtained in the step 4), and comparing the difference values, the smaller the difference value being, the higher the dependency between the factors and the low voltage being, and thus main cause of the transformer region low voltage can be obtained. The method is simple and high in operability, and can provide targeted decisionbasis for low-voltage treatment.

Description

technical field [0001] The invention relates to the field of low-voltage distribution networks, in particular to a method and system for analyzing the cause of low voltage in a station area. Background technique [0002] Many units and electric power research institutions at home and abroad have conducted scattered research on the causes of low voltage, and have qualitatively found out the reasons for the generation of ground voltage in the station area. According to the operation and maintenance experience of the power unit, the low voltage in the area is mainly related to factors such as insufficient transformer power supply capacity, too small wire diameter, too long power supply radius, insufficient reactive power, untimely gear adjustment, and three-phase imbalance. However, there is a lack of quantitative analysis methods and tools, and it is impossible to verify the influence of each factor and distinguish the primary and secondary of each factor. [0003] Due to the...

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Problems solved by technology

[0005] The technical problem solved by the present invention is to provide a method and system for analyzing the cause of low voltage in the station area, and to carry out quantitative analysis on the cause of low voltag...

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