Frequency controller design method and system based on alternating direction multiplier method

Abstract

The invention provides a frequency controller design method and system based on an alternating direction multiplier method. The method comprises the following steps: S10, establishing a load frequency control model according to a power system; S20, establishing an optimization model taking control performance and controller gain matrix sparseness as parameters; and S30, processing the parameter control performance and the parameter controller gain matrix sparseness in the optimization model by using an alternating direction multiplier method. A distributed optimal load frequency control (LFC) strategy mathematical model is constructed based on a quadratic polynomial and matrix rarefaction, and a load frequency controller with a frequency deviation of 0 and excellent dynamic performance is designed by adopting an alternating direction multiplier method (ADMM) to solve so as to solve the problem that a heuristic optimization algorithm does not necessarily obtain an optimal solution due to more optimized controller parameters.

Description

technical field [0001] The present application relates to the technical field of automatic control, in particular to a frequency controller design method and device based on the alternating direction multiplier method. Background technique [0002] Load frequency control (LFC) is to adjust the frequency of the system to reach the rated value or to maintain the exchange power of the regional tie line as the planned value. Frequency stability is an important indicator of power quality in power systems. Any sudden change in load may lead to the deviation of the exchange power of the tie line between the systems and the fluctuation of the system frequency. Therefore, to ensure power quality, a load frequency control (LFC) system is required, the purpose of which is to maintain the system frequency at the nominal value and to exchange power as much as possible for unplanned tie lines between control areas minimum. [0003] In order to improve the performance of load frequency ...

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Problems solved by technology

However, theoretically there is no guarantee that these heuristic optimization algorithms can obtain the optimal solution of the controller parameters, especially for the actual multi-regional power system, there are many controller parameters to be optimized, and the heuristic optimization algorithm may not be able to obtain the optimal solution. untie

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