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Distributed power source contained power system multi-target reactive-power optimization method

A technology of distributed power supply and power system, used in reactive power compensation, reactive power adjustment/elimination/compensation, wind power generation, etc.

Inactive Publication Date: 2012-12-12
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0005] Aiming at the multi-objective reactive power optimization problem involving distributed power sources mentioned in the background technology, and the respective advantages of artificial bee colony algorithm ABC and harmony search algorithm HS in solving multi-objective optimization problems, the present invention proposes a Multi-objective reactive power optimization method for power systems with conventional power sources

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  • Distributed power source contained power system multi-target reactive-power optimization method
  • Distributed power source contained power system multi-target reactive-power optimization method
  • Distributed power source contained power system multi-target reactive-power optimization method

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Embodiment Construction

[0061] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0062] figure 1 It is the equivalent circuit diagram of the wind power squirrel-cage generator of the power system provided by the present invention. figure 1 middle, X S is the stator leakage reactance, X r is the rotor leakage reactance, R r is the rotor resistance, X m is the excitation reactance, s is the slip rate, V is the terminal voltage, P WT is the active output of the wind turbine, Q WT is the reactive power output of the wind turbine.

[0063] figure 2 It is a modified IEEE14 node wiring diagram provided by the present invention. The whole system contains 14 nodes (1-14), 20 branches (connecting lines between two different nodes). stands for reactive power compensation generator, stands for di...

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Abstract

The invention discloses a distributed power source contained power system multi-target reactive-power optimization method in the field of power system reactive-power optimization. The technical scheme includes: 1, deducing a model of a wind-driven generator in power flow calculation; 2, initializing power grid parameters and grid-connected parameters of a distributed power source; 3, constructing an individual vector formed by system reactive-power optimization control variables, and initializing species; 4, performing the power flow calculation according to the initialized species and grid parameters after grid-connection of the distributed power source, and calculating objective function values; 5, performing multi-target optimization by utilizing the harmony search hybrid algorithm based on artificial bee colony; and 6, finishing the optimization process and outputting optimized results. The distributed power source contained power system multi-target reactive-power optimization method is a hybrid optimization algorithm ABS-HS which integrates the advantages of global search of the artificial bee colony (ABC) algorithm with local search of the existing harmony search (HS) algorithm, so that efficiency and robustness of the algorithm are improved.

Description

technical field [0001] The invention belongs to the field of reactive power optimization of power systems, and in particular relates to a multi-objective reactive power optimization method for power systems with distributed power sources. Background technique [0002] Power system reactive power optimization usually takes the regulation of generator terminal voltage, transformer taps, shunt compensation capacitors, reactors and other equipment as the control means, and through reasonable adjustment of reactive power flow distribution, it can reduce the active power loss of the power grid and improve the system Voltage quality, improving the power factor at the load end, ensuring the normal operation of electrical equipment, etc., so as to realize the optimization of the operating state of the power system, is a branch problem gradually differentiated from the development of optimal power flow. [0003] Mathematically, reactive power optimization is a typical multi-objective ...

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Application Information

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IPC IPC(8): H02J3/18
CPCY02E10/763Y02E40/30Y02E10/76
Inventor 李元诚曲洪达李文智王以良
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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