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Multilevel joint coordination automatic voltage control method based on decision trees

A voltage control method and automatic voltage technology, applied in the direction of AC network voltage adjustment, electrical components, circuit devices, etc., can solve the problems of adjustment oscillation, over compensation, and unsatisfactory AVC effects, etc., to achieve enhanced coordination ability, reactive voltage optimal effect

Inactive Publication Date: 2012-11-21
SHANGHAI SUNRISE POWER TECH
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Problems solved by technology

During the use of AVC, it may cause adjustment shock, non-adjustment or unsatisfactory adjustment equipment, and also cause reactive power multi-compensation or over-compensation
There are also some methods to form rules based on the experience of some dispatchers, combined with AVC for automatic voltage control, but these rules are difficult to adapt to complex and changeable power networks, and it is difficult to describe all operating modes, resulting in unsatisfactory AVC effects when put into operation

Method used

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  • Multilevel joint coordination automatic voltage control method based on decision trees
  • Multilevel joint coordination automatic voltage control method based on decision trees
  • Multilevel joint coordination automatic voltage control method based on decision trees

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Embodiment Construction

[0031] The embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings, but the present embodiments are not intended to limit the present invention, and any similar structures and similar changes of the present invention should be included in the protection scope of the present invention.

[0032] The embodiment of the present invention adopts the method of decision tree (Decision Tree) of data mining (Data Mining), according to the past scheduling data, combined with the power grid model, when the power grid operation mode changes, it is determined according to the result of the decision tree whether to adjust the AVC, If adjustment is really needed, according to the prediction result of the decision tree, it is determined whether the AVC adjusts the system equipment at the current level, or makes an adjustment request to the upper-level system, or adjusts the trigger command of the lower-level system.

[0033] T...

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Abstract

The invention provides a multilevel joint coordination automatic voltage control method based on decision trees, which relates to the technical field of power system dispatching automation. The method aims to solve the control problem of joint coordination between upper-level and lower-level systems in the same power system, and meanwhile, the decision tree method adopting data mining can also beused to solve the technical problem of the joint coordination between upper-level and lower-level station equipment in the systems of the same level. The method comprises the following implementationprocesses: 1) performing automatic voltage control AVC construction and practical operation; 2) establishing a data warehouse and node attributes; 3) putting up a decision tree; 4) testing samples; 5) adjusting the node attributes and cutting branches; 6) verifying the samples; and 7) generating a coordination strategy. The data mining method based on decision trees has the characteristics of high intuitionistic property, easy operation and capability of flexibly expanding the node attributes. The method can extract results to be predicted from a great amount of relevant information, which provides bases for power dispatching automatic control decision.

Description

technical field [0001] The invention relates to automation control technology, in particular to a technology for realizing automatic voltage and reactive power control of equipment joint coordination in a multi-level system of an electric power dispatching automation system. Background technique [0002] Voltage is one of the main indicators of power quality. Voltage quality has a direct impact on the stability of the power grid, the safe operation of power equipment, the safe production of industry and agriculture, and the electricity consumption of people's lives. If the voltage is too high, too low or deviates from a certain range, it will affect the service life and utilization efficiency of electrical equipment and cause economic losses. [0003] Multi-level joint coordination automatic voltage control AVC (Auto-Voltague Control), where multi-level refers to the automatic voltage control of the upper level, the lower level system, and the lower level system, and also i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02J3/16H02J13/00G06Q50/00G06Q50/06
CPCY02E40/34Y04S10/24Y02E60/726Y04S10/22Y02E40/74Y02E40/30Y02E40/70Y02E60/00Y04S10/00
Inventor 李昌章良栋杨晓玲
Owner SHANGHAI SUNRISE POWER TECH
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