Optimal secondary Gauss controller of dynamic reactive power compensation device and design method thereof

Abstract

The invention provides an optimal secondary Gauss controller of a dynamic reactive power compensation device. A thyristor control angle of the reactive power compensation device is sampled and serves as an input quantity, a reactive power of the reactive power compensation device is sampled and serves as an output quantity, model orders of the reactive power compensation device are selected, and a continuous time state equation of the reactive power compensation device is obtained by utilizing a model identification algorithm according to input data and output data, a Kalman filter is designed according to the obtained continuous time state equation of the reactive power compensation device, and an estimated value of a state variable of the reactive power compensation device is obtained by utilizing the Kalman filter; an indicator function is established and optimized, an emphasis matrix of state energy and an emphasis matrix of control energy are set according to empirical and actual dynamic and static requirements; a Riccati equation is solved to obtain a positive definite symmetric matrix; a gain matrix of the optimal secondary Gauss controller of the reactive power compensation device is calculated according to the positive definite symmetric matrix; a given gain matrix of the reactive power is calculated; and the optimal secondary Gauss controller of the reactive power compensation device is constructed to obtain the input of the thyristor control angle.

Description

Technical field [0001] The invention relates to the design of the control system of a dynamic reactive power compensation device in an electric power supply system, in particular to an optimal quadratic Gaussian controller for a dynamic reactive power compensation device and a design method thereof. Background technique [0002] In industrial power systems such as iron and steel, metallurgy, etc., dynamic reactive power compensation is required for the system due to load changes. The current commonly used control method is to use PID control algorithms to perform double closed-loop control of the system. Due to load changes, the control system is in PID The parameter setting is more complicated. The reactive power compensation device used in engineering practice usually adopts several forms of control strategies such as power factor control, voltage control, and reactive power control. One thing these control strategies have in common is that the inner loop of the control system ...

AI Technical Summary

Problems solved by technology

[0002] In industrial power systems such as iron and steel, metallurgy, etc., due to load changes, it is necessary to perform dynamic reactive power compensation on the system. At present, the commonly used control method is to use the PID control algorithm to perform double closed-loop control on the system. Parameter setting is more complex

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