Reactive power compensation method for transformer

Abstract

The invention discloses a reactive power compensation method for a transformer and relates to the technical field of electric energy treatment. The reactive power compensation method comprises the following steps: 1, calculating reactive power Q idle load generated in the idle load according to a reactive power calculation method for the transformer in the idle load of a transformer model; 2, calculating reactive power Q load generated in the load according to the reactive power calculation method for the transformer in the load; 3, calculating the total reactive power quantity of the transformer; 4, compensating the transformer by using the total reactive power quantity obtained in the step 3 as a reactive power compensation instruction for the transformer. According to the reactive power compensation method for the transformer, high-voltage-side voltage current does not need to be sampled, the reactive power of the transformer is predicted through a user load and is compensated by adjusting the output of an SVG (Static Var Generator), the reactive power of an access network is reduced, the dynamic response is quick, the compensation is accurate, the problem of resonance does not exist, and the problem of reactive power of the transformer can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of electric energy management, in particular to a compensation method for reactive power compensation of a transformer. Background technique [0002] With the rapid development of modern industry, industrial power consumption is increasing, and industrial electrical equipment is dominated by motors and high-power rectifiers. Therefore, reactive power and harmonics have become the most prominent problems in the quality of industrial power consumption. Large power transmission line loss will increase and reduce the utilization rate of electric energy. The power factor is an important indicator to measure the utilization rate of electric energy. Its definition is as follows: [0003] ρ = Q P 2 + Q 2 - - - ...

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Problems solved by technology

[0015] In order to overcome the problem in the prior art that the SVC capacitor switching equipment cannot compensate the power factor of the transformer at all when the frequency of load changes is high, the present invention aims to provide a compensation method for reactive power compensation of the transformer, which is based on Transformer model, when the active power filter APF is used to compensate the reactive power and harmonics of the transformer back-end load, the reactive power of the transformer is accurately predicted, and the reactive power generated by the transformer is also compensated

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