A Decentralized Coordinated Control Method for Stable Operation of Multi-machine Power System
A technology of decentralized coordinated control, electromechanical power system, applied in electrical components, circuit devices, AC network circuits, etc., can solve problems such as affecting the stable operation of the power grid
Inactive Publication Date: 2016-06-08
WUHAN UNIV
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Problems solved by technology
After a complete modeling of the generators in the multi-machine power system, it is found that the mathematical model of each generator is composed of a set of dynamic equations and a set of non-dynamic coupling equations. The change of the operating parameters of a generator is bound to Affect the operating status of other interconnected generators, thereby affecting the stable operation of the entire power grid
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[0107] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit this invention.
[0108] Taking the model of three machines and nine nodes as an example, the distributed coordination optimal control of multi-machine power system is designed. figure 1 It is an IEEE three-machine nine-node model, in which all impedances are per unit values based on 100MVA.
[0109] The rotor motion equation of the multi-machine power system is listed and written as follows:
[0110] dδ i dt = ...
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The invention discloses a dispersed coordination control method for stable running of a multi-machine power system. An IEEE three-machine nine-node system is taken for example, the multi-machine power system is subjected to mathematical modeling, a model is analyzed and researched, the rotor motion equation of the multi-machine power system is deviated to obtain a standard linear state variable equation, an optimal dispersed coordination controller is obtained through an Levine-Athans equation set obtained by solving by a direct iteration method on the basis of linearization, and an optimal dispersed coordination control law capable of adapting to a static stability situation is designed, so that stable running of the power system can be guaranteed and the stability of a power grid is improved. The dispersed coordination control method has theoretical values and practical meanings on research and verification of the control law of the multi-machine power system and improvement of the running stability of the power system.
Description
technical field [0001] The invention belongs to the technical field of multi-machine power system control, relates to a control method for a multi-machine power system, and specifically refers to an optimal decentralized coordination control method for effectively controlling a multi-machine power system. Background technique [0002] While the interconnected operation of multiple units brings significant economic and social benefits, it also brings new challenges to the stable operation of the power grid. Due to the interconnection of the power grid, there is a certain coupling relationship among the units. A single fault disturbance will not only affect the normal operation of the unit in this system, but also involve the operating status of other units, which may cause the power flow, voltage and The frequency changes, causing a chain reaction of automatic protection devices and causing large-scale power outages. As a result, the realization of the interconnection of mul...
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IPC IPC(8): H02J3/00
Inventor 来金钢周洪胡文山宋春德路晓庆高星冉江朝强
Owner WUHAN UNIV