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On-line weight-changeable control method for multipurpose mixed integer coordinating secondary voltage

A secondary voltage control and mixed integer technology, applied in the electric power field, achieves good voltage recovery effect, enhanced coping ability, and good practical application prospects

Inactive Publication Date: 2014-12-17
SOUTH CHINA UNIV OF TECH +1
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Problems solved by technology

[0011] The purpose of the present invention is to provide an online variable weight multi-objective mixed integer coordinated secondary voltage control method, aiming to solve the problem that it is difficult to reasonably set the weight coefficient according to the system requirements in the prior art

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  • On-line weight-changeable control method for multipurpose mixed integer coordinating secondary voltage
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  • On-line weight-changeable control method for multipurpose mixed integer coordinating secondary voltage

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[0036] In order to make the object, technical solution and advantages of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0037] The present invention provides an online variable weight multi-objective mixed integer coordinated secondary voltage control method, which is mainly used for: (1) avoiding the difficulty of weight coefficients when the order of magnitude difference of each objective function component value of CSVC is too large in actual system application; Well-placed puzzles. (2) To avoid the adverse effects of fixed weight coefficients on CSVC control, according to the actual operating conditions of the system, including the reactive power output and voltage level of generators in the partition, the weight coefficients of each objective function component are formulated online to enhance CSVC's control of various Adaptability to operating condi...

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Abstract

The invention discloses an on-line weight-changeable control method for multipurpose mixed integer coordinating secondary voltage. The control method comprises the following steps: calculating a control sensitivity of a controlled volume in a partition relative to a control variable; discretizing a reference value of generator exciting voltage, obtaining state space of the controlled volume, and establishing a coordinating secondary voltage control model; respectively using two components and an approximate number of an objective function in the control model in a quadratic programming form as an optimal solution under an unitary objective component obtained by solving the objective function and the approximate number; establishing a multipurpose mixed integer programming model containing continuous control and discrete control; and then calculating a weight coefficient of each objective function and choosing the optimal solution based on a Pareto front obtained by the weight coefficient. The on-line weight-changeable control method for the multipurpose mixed integer coordinating secondary voltage can prevent the problem that the weight coefficient cannot be reasonably set when difference of order of magnitudes of function values of the objective components is too big in actual system application, formulate the weight coefficient of each objective in real time based on actual operation conditions of the system, and strengthen coping capacity of the system against variable operation conditions.

Description

technical field [0001] The invention relates to the field of electric power, in particular to an online variable weight multi-objective mixed integer coordinated control method for secondary voltages. Background technique [0002] SVC (secondary voltage control, secondary voltage control) is a hierarchical voltage control scheme based on dominant nodes and control areas. It divides the system into several control areas, and selects the other nodes in each control area. The key busbar with important influence is the dominant node, and changes the reference voltage setting value of the automatic voltage regulator of each control generator in the area according to a certain predetermined control method, so as to maintain the voltage of the dominant node unchanged. CSVC (coordinated secondary voltage control, coordinated secondary voltage control) uses redundant control degrees of freedom on the basis of SVC to achieve other control objectives, such as balancing the reactive pow...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/16
CPCY02E40/34Y02E40/30
Inventor 刘明波李婷谢敏赵建宁
Owner SOUTH CHINA UNIV OF TECH
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