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Intelligent substation reactive power optimization configuration method based on improved optimal covering method

A smart substation and optimized configuration technology, applied in reactive power compensation, reactive power adjustment/elimination/compensation, etc., can solve problems such as dynamic reactive power compensation device and capacitor research considerations, single compensation type, etc.

Inactive Publication Date: 2014-09-03
STATE GRID CORP OF CHINA +2
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Problems solved by technology

However, the above existing technologies only consider a single compensation type, and do not consider the cooperation of dynamic reactive power compensation devices and capacitors.

Method used

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  • Intelligent substation reactive power optimization configuration method based on improved optimal covering method
  • Intelligent substation reactive power optimization configuration method based on improved optimal covering method
  • Intelligent substation reactive power optimization configuration method based on improved optimal covering method

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Embodiment Construction

[0049] The invention adds a dynamic reactive power compensation device on the basis of traditional capacitor bank compensation for coordinated compensation, and establishes a multi-objective optimization model based on the idea of ​​improved optimal coverage. Through unified dimensions, the multi-objective optimization model is converted into a minimum annual loss The single objective evaluation function is the objective function; in the case of unequal capacity grouping, the objective function is adaptively modified by introducing equipment degradation coefficients. Finally, based on the objective function, the traditional genetic algorithm is used to perform optimization calculations, and multiple sets of candidate optimal configuration plans are obtained. By comparing the comprehensive annual loss costs of multiple sets of candidate optimal configuration plans, the optimal optimal configuration plan of the smart substation is obtained.

[0050] Since the SVC (Static Var Compens...

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Abstract

The invention discloses an intelligent substation reactive power optimization configuration method based on an improved optimal covering method. The method includes the steps that firstly, an annual reactive load curve is generated according to historical reactive data of an intelligent substation, and a reactive load probability curve is acquired based on the annual reactive load curve and a probability distribution principle; secondly, a region formed by the reactive load probability curve and a coordinate axis is covered with a capacitor bank and a dynamic reactive power compensation device; thirdly, an objective function is acquired by taking minimum of a mismatch area function and an investment cost function into consideration; fourthly, an optimal configuration scheme is acquired through a genetic algorithm according to the objective function. The purpose of coordinated configuration of the dynamic reactive power compensation device and the capacitor bank under the new reactive power compensation situation of the intelligent substation is effectively achieved, reactive power configuration is optimized from the probability aspect, minimum control errors are accumulated in the probability, the equipment utilization probability is increased, and the method has theoretical and guiding significance in the new construction situation of an intelligent power grid.

Description

Technical field [0001] The invention belongs to the technical field of intelligent substation reactive power optimization configuration, and more specifically relates to a smart substation reactive power optimization configuration method based on an improved optimal coverage method. Background technique [0002] Smart grid is the development direction of the future power grid, covering all aspects of power generation, transmission, transformation, distribution, power consumption, dispatch, communication and information. Among them, the smart substation is the foundation of the smart grid and an important link for the safe and reliable operation of the entire grid. Smart grids put forward higher requirements for power quality, line loss and voltage stability, requiring the non-functioning of smart substations to achieve real-time local control. The use of a single capacitor grouping compensation is slightly weak, and the principle of reactive power real-time on-site balance canno...

Claims

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Application Information

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IPC IPC(8): H02J3/18
CPCY02E40/30
Inventor 宋璇坤李勇段国泉戚庆茹刘涤尘吴军柯丽娜祁林阁
Owner STATE GRID CORP OF CHINA
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