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AVC (Automatic Voltage Control) system constant value regulation method based on probability statistics characteristic

A technology of probability statistics and fixed value adjustment, which is applied in the direction of AC network voltage adjustment, reactive power compensation, etc., can solve the problems of unable to reflect the dynamic characteristics of the system, single fixed value setting, lack of scientific rigor, etc.

Active Publication Date: 2014-02-26
GUANGZHOU POWER SUPPLY CO LTD +1
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Problems solved by technology

[0008] 1. The fixed value setting relies on manual experience and lacks scientific rigor;
[0009] 2. The fixed value setting is single, adopting a one-size-fits-all form to set a fixed value for AVC in all areas;
[0010] 3. The fixed value setting cannot reflect the dynamic characteristics of the system;

Method used

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  • AVC (Automatic Voltage Control) system constant value regulation method based on probability statistics characteristic
  • AVC (Automatic Voltage Control) system constant value regulation method based on probability statistics characteristic
  • AVC (Automatic Voltage Control) system constant value regulation method based on probability statistics characteristic

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Embodiment

[0080] Such as figure 2 , image 3 As shown, the AVC system fixed value adjustment method based on probability statistics in this embodiment includes the following steps:

[0081] Step 1: Firstly, related data such as voltage and reactive power historical data, power load data, previous voltage and reactive power control device adjustment data and capacitor capacity, capacitor switching data, and main transformer adjustment data in each area of ​​the AVC system are transferred from SCADA, EMS and other systems extract, load into the data warehouse, and provide analysis data sources;

[0082] A data warehouse is a data structure form that is subject-oriented, integrated, stable, and time-varying to collect data to support management decisions. Its goal is to provide support information for making management decisions. Compared with database technology, its outstanding mass data storage capacity and fast retrieval capacity provide strong support for the specific implementatio...

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Abstract

The invention discloses an AVC (Automatic Voltage Control) system constant value regulation method based on probability statistics characteristic. The method comprises the following steps of firstly, extracting and loading related data system to a data warehouse; by virtue of denoised data, extracting AVC voltage reactive power historical data and AVC system constant value data of each area, calculating fluctuation ratio of voltage reactive power in each period, forecasting the voltage reactive power for one regulation cycle, and obtaining a voltage reactive power data forecasting sequence; calculating a comprehensive system risk probability value P; obtaining the AVC system constant value based on probability statistics characteristic according to upper and lower limit values of the AVC system in each area; and by virtue of the upper and lower limit values, performing analog emulational regulation test on the system according to the voltage reactive power data forecasting sequence, updating a data source of the data warehouse after operating for one regulation cycle, and repeatedly obtaining a new system constant value. The method provided by the invention dynamically and periodically regulates the system constant value, thereby enabling system regulation to besuitable for operation characteristics of a power system in different periods.

Description

technical field [0001] The invention belongs to the field of automatic control of electric power systems, and relates to an automatic voltage control system internal parameter setting and adjustment optimization method based on probability and statistical characteristics, in particular to an AVC system fixed value adjustment method based on probability and statistical characteristics. Background technique [0002] Voltage is an important indicator of power system operation and an important indicator of power quality. The stability of voltage is the guarantee for the safe and stable operation of the power system, and it is of great significance to reduce active power loss and improve the economic benefits of power grid operation. Since the 1980s, the establishment of a unified automatic voltage control system (Automatic Voltage Control, AVC) at all levels of the power grid has become a hot research field to improve the system voltage level and ensure the safety and stability ...

Claims

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Application Information

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IPC IPC(8): H02J3/16
CPCY02E40/34Y02E40/30
Inventor 黄欣高明魏勇军刘有志杨立洪李东旭胡扬叶石罡余天伦
Owner GUANGZHOU POWER SUPPLY CO LTD
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