Method for off-line setting of PID parameters of generator excitation device

Abstract

The invention discloses a generator excitation device PID parameter off-line setting method, and the method comprises the steps: firstly building a virtual simulation system, enabling the virtual simulation system to be connected with an excitation device, carrying out the excitation test, obtaining a data set, carrying out the optimization of an initial weight and a threshold value of a BP neural network through a genetic algorithm, training the BP neural network through the collected data set, and carrying out the optimization of the initial weight and the threshold value of the BP neural network. And carrying out iterative optimization on a prediction result of the PID dynamic characteristic prediction model through an adaptive genetic algorithm, and finding out an excitation device PID parameter with the optimal control performance. The device is convenient to operate, safe, efficient and real in data, the running condition of a real generator can be simulated, and rapid setting of PID parameters of the excitation device can be achieved.

Description

technical field [0001] The invention belongs to the field of intelligent control of power systems, in particular to an off-line tuning method for PID parameters of a generator excitation device. Background technique [0002] The synchronous generator excitation system is one of the most important control systems of the generator. The quality of its control performance not only affects the stability of the generator, but also directly determines the power quality of the grid. The excitation control of the generator has been regarded as one of the main measures to improve and improve the stability of the power system. The synchronous generator is a nonlinear time-varying system. The excitation device usually uses a PID controller to adjust its excitation current. The parameters of the traditional PID controller are difficult to set and the control effect is not good. [0003] Before the excitation device leaves the factory, the commissioning personnel need to debug it to judg...

AI Technical Summary

Problems solved by technology

The synchronous generator is a nonlinear time-varying system. The excitation device usually uses a PID controller to adjust its excitation current. The parameters of the traditional PID controller are difficult to set and the control effect is not good.

[0003] Before the excitation device leaves the factory, the commissioning personnel need to debug it to judge whether its functions are normal. This process requires connecting the excitation device to the synchronous generator and the power grid to proceed normally, which is time-consuming and laborious for the commissioning personnel; the excitation device is officially Before putting into operation, commissioning personnel need to conduct dynamic experiments for parameter setting, but on site, the experiment time given by the power plant is usually relatively short, and it is not easy to adjust the parameters to the best state, generally only reaching the qualified level; After delivery, the staff of the power plant need to learn its operation. At this time, if the generator is connected to the power grid, there will be certain dangers.

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