Constraint priority rule-based reactive power optimization method in power system

A power system and optimization method technology, applied in reactive power compensation, reactive power adjustment/elimination/compensation, circuit devices, etc., and can solve problems such as variable violation of constraints and low efficiency

Inactive Publication Date: 2016-10-12
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Therefore, CPR can select the optimal individual during the search process, and can also solve the problem of variable violation constraints; in addition, it also avoids the low efficiency problem caused by adjusting the penalty coefficient

Method used

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  • Constraint priority rule-based reactive power optimization method in power system
  • Constraint priority rule-based reactive power optimization method in power system
  • Constraint priority rule-based reactive power optimization method in power system

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Embodiment Construction

[0070] Below in conjunction with accompanying drawing, the present invention will be further described:

[0071] Such as figure 1 As shown, the GSA-CPR algorithm is obtained by combining the present invention with GSA, and the GSA-CPR is applied to the solution of power system reactive power optimization, and 30 independent simulation experiments are carried out for two different objective functions. The experimental results show that through the GSA-CPR algorithm, the optimal control variable value can be found to minimize the active power loss of the system; and it shows better convergence and robustness. Specific steps are as follows:

[0072] (1) Determination of the reactive power optimization mathematical model of the power system. The mathematical model of reactive power optimization is divided into two parts: objective function and constraint conditions.

[0073] (1.1) From the economic point of view, the objective function is:

[0074] min ...

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Abstract

The invention discloses a constraint priority rule-based reactive power optimization method in a power system. The method comprises the following steps of (1) establishing a reactive power optimization mathematic model of the power system and setting algorithm parameters; (2) generating a random initial group; (3) performing load flow calculation to obtain a fitness value of particles and an out-of-limit condition of a state variable, and storing the best individual and the global best individual of the particles; (4) if iteration is carried out for the first time, directly performing the step 5, or otherwise, performing a constraint processing method proposed by the invention; (5) updating the particles according to a speed and position updating formula of a gravitational search algorithm to obtain a new group; and (6) judging whether the algorithm meets a stop condition or not, if yes, stopping the iteration and outputting a global optimal value, namely, an optimal solution of a reactive power optimization problem, or otherwise, returning to the step 3 and continuing to perform the iteration. The method has relatively good optimization effects of high search efficiency, good convergence effect, good robustness and high solution quality in an aspect of handling the reactive power optimization problem of the power system.

Description

technical field [0001] The invention belongs to the technical field of optimizing reactive power in electric power systems, relates to the technical field of reactive power optimization schemes in electric power systems, and specifically relates to a novel method for processing reactive power optimization constraints and a power system reactive power system based on a gravity search algorithm combined with the method. work optimization method. Background technique [0002] The power industry is a supporting industry in the national economy, so safe, stable and economical operation is an inevitable requirement for the power system. The distribution of reactive power directly affects the safety, stability and economy of the power system, so reactive power optimization is an important control method for power system operation, and has also attracted extensive attention from researchers. [0003] The methods for solving reactive power optimization of power systems are mainly di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/18
CPCH02J3/18H02J2203/20Y02E40/30
Inventor 陈功贵刘利兰邱思远陆正媚
Owner CHONGQING UNIV OF POSTS & TELECOMM
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