Reactive power compensation method for overhead power transmission line

Abstract

The invention discloses a reactive power compensation method for an overhead power transmission line. The method comprises the following steps: calculating the rated compensation capacitance value of the overhead power transmission line when a current booster works in the rated work condition; selecting a first compensation capacitance value and a second compensation capacitance value; measuring the input current values, corresponding to the rated compensation capacitance value, the first compensation capacitance value and the second compensation capacitance value, of the current booster respectively and comparing the input current values after measurement; selecting the first input current values or the second input current values as a starting point and searching the compensation capacitance value corresponding to the minimum input current value of the current booster by a numerical approximation method; and performing reactive power compensation on the overhead power transmission line according to the searched compensation capacitance value. According to the searched compensation capacitance value, calculation distortion caused by direct calculation is avoided and the obtained result is close to the actual optimum compensation capacitance value, so that the reactive power compensation effect on the overhead power transmission line is greatly improved.

Description

technical field [0001] The invention relates to the technical field of overhead power transmission lines, in particular to a reactive power compensation method for overhead power transmission lines. Background technique [0002] All electrical equipment with electromagnetic coils must consume reactive power to establish a magnetic field. In the overhead transmission line, the current booster needs to consume reactive power to make the primary coil of the transformer generate a magnetic field and induce current in the secondary coil. Loading a large current for a long time in the overhead transmission line will inevitably consume a certain amount of reactive power, resulting in a lot of unnecessary electric energy wasted; at the same time, due to the existence of reactive power, the current booster cannot exert its maximum performance, and the secondary side induction The current cannot rise, and the carrying capacity is limited. When the current does work in the inductive ...

AI Technical Summary

Problems solved by technology

However, in actual situations, the appearance of reactive power is affected by many factors, and many of these effects are unknown

Therefore, the compensation capacitance value calculated according to the rated parameters is often inaccurate, and sometimes there will be serious deviations

This affects the reactive power compensation effect of overhead transmission lines

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