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A substation avc system and its calculation method for real-time reactive power adjustment

A calculation method and substation technology, applied in reactive power compensation, AC network voltage adjustment, circuit devices, etc., can solve the problems of many adjustment times, prone to oscillation adjustment, and long adjustment process.

Active Publication Date: 2020-10-30
XUJI GRP +2
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Problems solved by technology

[0006] The purpose of the present invention is to provide a substation AVC system and its reactive power real-time adjustment calculation method to solve the problems of many adjustment times, long adjustment process and easy occurrence in the prior art in the adjustment of the bus voltage and power factor of the power grid in the substation. The problem of oscillatory regulation

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  • A substation avc system and its calculation method for real-time reactive power adjustment
  • A substation avc system and its calculation method for real-time reactive power adjustment
  • A substation avc system and its calculation method for real-time reactive power adjustment

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Embodiment Construction

[0050] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0051] The invention provides an AVC system of a substation and a method for calculating the reactive power real-time adjustment amount thereof, which are suitable for terminal substations.

[0052] For substations with double-winding transformers, the power flowing through transmission lines, transformers, busbars, shunt capacitor banks, and electrical loads can be represented by an equivalent circuit diagram, such as figure 1 shown.

[0053] u 0 , U 1 , U 0 , U′ 1 They are respectively the busbar voltage at the power supply end of the large power grid, the busbar voltage at the high-voltage side of the main transformer, the busbar voltage at the low-voltage side of the main transformer, and the voltage at which the busbar voltage at the high-voltage side of the main transformer is stepped down to the low-voltage side by an ideal transformer.

[0054] R...

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Abstract

The invention relates to an AVC system of a substation and a method for calculating the reactive power real-time regulation quantity thereof, Through a series of eigenvalues, Simplified reactive power, The complex relationship between bus voltage and other parameters, and establish the model of the high-voltage side bus voltage, low-voltage side bus voltage and reactive power generated by the gridinput substation high-voltage side after the high or low-voltage side of the transformer is put into the reactive power compensation device, or increase or decrease the position of the first-gear transformer tap-changer. When the substation AVC system is running in the field, the model can be used as an internal algorithm in the AVC system to help the AVC system to formulate reactive power compensation switching strategy quickly and accurately, thus a new substation AVC system is produced. The new AVC system can meet the fast response time requirements of voltage and reactive power regulation, so that the voltage and reactive power of the substation can be maintained within the acceptable range at any time, and the output power quality of the substation can be improved.

Description

technical field [0001] The invention relates to an AVC system of a substation and a method for calculating a reactive power real-time adjustment amount thereof, belonging to the technical field of electric power. Background technique [0002] Substations can be divided into system hub substations, regional primary substations, regional secondary substations and terminal substations according to their status and functions in the power system. Generally, reactive power compensation devices and automatic voltage and reactive power control (AVC) systems are installed at the terminal substations that directly supply power to users at the end of the power grid to adjust reactive power and voltage, so as to ensure the power quality of power supply at the user end and reduce the power grid. The purpose of active power loss in the system. [0003] The AVC system is a software system that automatically controls the voltage and power factor in the substation. It tracks the changes of ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/16
CPCH02J3/16H02J2203/20Y02E40/30
Inventor 张旭升马红伟李瑞生彭世康傅美平
Owner XUJI GRP
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