Multi-model integrated intelligent control method of large generator group

Abstract

The invention discloses a multi-model integrated intelligent controlling method of a heavy-duty generator unit. The method comprises (1) constructing a model library and a controller library, wherein the model library comprises N submodels corresponding to the N operation conditions of the generator unit, the controller library comprises N submodel fuzzy controllers, each is designed a control rule corresponding to one submodel; each submodel fuzzy controller is the controller with double inputs and double outputs, the inputs are power angle deviation amount e delta and terminal voltage deviation amount u2, and the outputs are excitation regulation amount uf and valve opening regulation amount u2; (2) acquiring the real-time operating conditions data of the generator unit, and judging the actual operating conditions value based on the variable (delta, Vt); and (3) calculating the matching degree fn of the actual operating conditions value (delta, Vt) and N submodels in the model library, which is used as a weighting coefficient wn (n is an integer) of the integration of the integrated controller. The invention has the advantages of simplicity, good reliability, good real-time performance, high control accuracy, and good practical performance.

Description

technical field [0001] The invention mainly relates to the control field of large generating sets, in particular to a multi-model comprehensive intelligent control method for large generating sets. Background technique [0002] In the prior art, the safety and stability of the power system operation, that is, the dynamic safety and reliability problem, is an important issue in the power system operation. The main means to improve and enhance the stability of the power system is to adopt new power equipment and control methods. Large-scale generator sets are key equipment in the operation of power systems, and their effective control is conducive to the stable, safe and economical operation of power systems, and is also an effective link to improve the transient stability of power systems. The comprehensive control of excitation control combined with valve opening adjustment is a major trend in the control of large generator sets, which has a major impact on improving the st...

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Problems solved by technology

Since these methods all rely on the mathematical model of the generator set and are based on complex nonlinear processing or multiple iterative calculations, it is not easy to solve the problems of strong nonlinearity, large-scale operation, and constantly changing working conditions in the integrated control of the generator set. problem, and it is difficult to achieve better decoupling for the coupling system of excitation and valve

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