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Distribution transformer reactive power compensation method

A technology of distribution transformer and compensation method, applied in the field of electric power, can solve the problems of low average power factor, inability to track and compensate the load and transformer quickly and accurately, and poor dynamic performance, etc.

Inactive Publication Date: 2014-09-24
STATE GRID CORP OF CHINA +1
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AI Technical Summary

Problems solved by technology

However, due to the poor dynamic performance and unsuitable control strategy of these "high supply and high meter" distribution transformer compensation devices, most users are faced with the problem of average power factor Low and power factor adjustment electricity bills and other issues

Method used

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  • Distribution transformer reactive power compensation method
  • Distribution transformer reactive power compensation method
  • Distribution transformer reactive power compensation method

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Embodiment Construction

[0018] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0019] The inventor found through research that the average power factor refers to the ratio of the average active power to the average apparent power within a period of time, and its expression is:

[0020]

[0021] in, is the average power factor, P av is the average active power, S av is the average apparent power, Q av is the average reactive power.

[0022] Alternatively, the average power factor can also be calculated by the active energy consumption W over a period of time P and reactive power consumption W Q Expressed as:

[0023]

[0024] Therefore, in order to improve the average power fact...

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Abstract

The invention provides a distribution transformer reactive power compensation method which is a reactive power compensation new method of a 'massive quantity power supply' distribution transformer. Through carrying out reactive power compensation at a transformer low voltage side, the average power factor of a transformer high voltage side is raised. The method comprises a step of connecting reactive power compensation equipment to the low voltage side of a distribution transformer, a step of taking the current of a power transformer high voltage side and voltage of the high voltage side or low voltage side as the control signal of the reactive power compensation equipment, a step of dynamically outputting reactive power with a constant power factor as the control target of a static var generator (SVG) or with a power factor as the switching criterion of a thyristor switched capacitor (TSC) and compensating the reactive power needs of the transformer and a load so as to raise the average power factor of the transformer high voltage side.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method for reactive power compensation of distribution transformers. Background technique [0002] "High supply and high meter" refers to power supply to special transformer users with high voltage, and at the same time, metering is performed on the high voltage side of the special transformer. The advantage of the "high supply and high meter" metering method is to reduce the workload of metering management, meet the metering requirements to the greatest extent, and have great controllability. [0003] According to the "Technical Principles for Reactive Power Compensation Configuration of Power System of State Grid Corporation", the reactive power compensation of 10kV and other voltage level distribution networks is mainly based on centralized compensation on the low-voltage side of distribution transformers, supplemented by high-voltage compensation. For power users w...

Claims

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Application Information

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IPC IPC(8): H02J3/18
CPCY02E40/10
Inventor 刘鹏张学深李海吕志来
Owner STATE GRID CORP OF CHINA
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