Reactive compensation degree grading method of transformer substation

Abstract

The invention relates to a reactive compensation degree grading method of a transformer substation. Grading is carried out on the reactive compensation degree of the transformer substation by calculating the reactive compensation ratio Bb of the transformer substation, the power factor Qg of a transformer in a long time during the operation of the transformer substation and the power factor Hg after a reactive compensation device is completely used during peak load; and whether the reactive compensation degree of the transformer substation is sufficient is introduced to be combined with power factors before and after compensation and a compensation ratio in an initial design period. The system comprehensively analyzes the reactive compensation degree of the transformer substation, and solves the problem that a current reactive compensation device of the transformer substation is fundamentally free of capacity increase or the device is replaced and the capacity of the device is increased after the device is in failure; and the method is wide in applicable range, due to the fact that the reactive compensation capacity in the initial design period and the power factors during operation for different voltage grades of transformer substations in the standard are strictly required and the parameters are easily obtained respectively, the method can carry out reactive compensation degree grading on various different voltage grades of transformer substations.

Description

Technical field [0001] The invention relates to the field of substation operation, in particular to a method for grading the degree of reactive power compensation in a substation. Background technique [0002] With the gradual formation of national regional grid interconnection and ultra-high voltage backbone grids, the power system has increasingly higher requirements for the adjustment and control of reactive power and voltage. When the system's reactive power reserve is insufficient, voltage collapse may occur and the power grid may collapse. In addition, both the transformer in the substation and the load outside the station need to consume a certain amount of reactive power. A reasonable reactive power compensation configuration can improve the power factor of the transformer, increase the grid voltage level, and at the same time improve the level of grid voltage stability. [0003] At present, when configuring reactive power compensation devices in various regions, they ofte...

AI Technical Summary

Problems solved by technology

[0003] At present, when configuring reactive power compensation devices in various regions, they often do not combine the actual situation, and directly configure capacitive reactive power compensation devices according to the lower limit of the standard requirements, so that the capacitive reactive power compensation of the substation is too low, and the reactive power cannot be balanced locally.

Or configure the reactive power compensation capacity according to the calculated value, but the reactive power compensation capacity is still insufficient as the load increases later

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