Dynamic reactive power optimization method of large-scale alternating current and direct current power system

A power system and optimization method technology, applied in reactive power compensation, reactive power adjustment/elimination/compensation, etc., can solve problems such as low accuracy, large amount of calculation, and poor efficiency

Inactive Publication Date: 2013-02-13
SOUTH CHINA UNIV OF TECH +1
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Problems solved by technology

[0012] The purpose of the present invention is to provide a dynamic reactive power optimization method for large-scale AC and DC power systems, aiming to solve the problems of large calculation, poor efficiency and low accuracy of the existing reactive power optimization methods for power systems

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  • Dynamic reactive power optimization method of large-scale alternating current and direct current power system
  • Dynamic reactive power optimization method of large-scale alternating current and direct current power system
  • Dynamic reactive power optimization method of large-scale alternating current and direct current power system

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Embodiment Construction

[0057] 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.

[0058] see figure 1 , the process of the dynamic reactive power optimization method for the AC / DC power system based on the successive linear programming method provided by the present invention includes the following steps:

[0059] Step S1. Initialize time i to 0 o'clock, starting with 0 o'clock;

[0060] Step S2, input the basic data of the system, the upper and lower limit constraints of the system operation, and the optimal power transmission power of the DC line at the previous moment;

[0061] Step S3, initializing the number of iterations k to 0, and setting the maximum linearization step limit;

[0062] Step S4, performing AC and DC power flow calculations, calculating the voltage and power flow distribution of each node;

[...

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Abstract

The invention discloses a dynamic reactive power optimization method of a large-scale alternating current and direct current power system. The method comprises the following steps of: firstly, solving a sensitivity coefficient matrix of an alternating current and direct current system state variable on a control variable according to an equality constraint; secondly, solving a sensitivity coefficient matrix of section power on the control variable in consideration of a section power inequality constraint, and thus establishing an alternating current and direct current reactive power optimization successive linear planning model of a section power constraint at a single time point; and finally, solving and considering coupling constraints of adjacent time section direct current line power fluctuation smoothness one by one according to each time point, and introducing a computation result of the previous time point at a solving time point, so a dynamic optimization idea is truly embodied. By adoption of the method, the coupling constraints of the adjacent time section direct current power fluctuation smoothness can be considered, the problems of high computation amount and curse of dimensionality caused by the conventional solving dynamic reactive power optimization complete model are solved.

Description

technical field [0001] The invention relates to the field of electric power, in particular to a dynamic reactive power optimization method for a large-scale AC and DC power system. Background technique [0002] The reactive power optimization method of the AC power system refers to that when the system structure and parameters, the active and reactive power of the load, and the active output of the generator are given, under the condition of satisfying various operating equipment and operating constraints of the system, through the optimization of the generator terminal The voltage and reactive power compensation equipment output and the tap of the adjustable transformer are adjusted to minimize the active network loss of the system. In addition to the above-mentioned pure AC system control measures, control measures for reactive power optimization of AC and DC systems also include DC voltage, DC current, control angle of converter stations, etc. [0003] Reactive power opt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/18
CPCY02E40/30
Inventor 谢敏何智文刘明波梁敬成谌军
Owner SOUTH CHINA UNIV OF TECH
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