WAMS-based low-frequency oscillation decentralized controller design method considering interaction
A decentralized controller and low-frequency oscillation technology, applied in the direction of reducing/preventing power oscillation, etc., can solve impractical problems, achieve reduced dependence, good control effect, and increased adaptability
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[0029] The method of the present invention will be further explained below in conjunction with the drawings, including system modal parameter identification, key mode determination, controllability calculation, control loop combination Pareto optimal set solution, and optimal control loop combination design of each controller.
[0030] Step 1: Identify the modal parameters of the system and determine the number of key modes and controllers based on the N4SID method.
[0031] Due to the large error of the single-input single-output identification result, the present invention is based on the N4SID method, using WAMS to collect multiple sets of disturbance signals and the power angle, angular velocity or active signal of each unit, and identify the reduced-order state matrix of the single-input multiple-output system group by group. The fitness function value that satisfies the identification result is greater than 90%, and the system reduced-order state matrix A is obtained by combin...
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