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

Abstract

The invention provides a design method of an optimal secondary regulator of a dynamic reactive power compensation device. The design method of the optimal secondary regulator of the dynamic reactive power compensation device comprises the following steps: sampling a reactive power output by the reactive power compensation device and a thyristor amplification coefficient, and obtaining a transfer function of the reactive power compensation device by utilizing a model identification algorithm; in the form of observable standard form of a control system theory, designing a continuous time state equation of the reactive power compensation device; setting up an optimizing index function; solving a Riccati equation; calculating a gain matrix of the optimal secondary regulator of the reactive power compensation device; and obtaining an input thyristor amplification coefficient of a control system of the reactive power compensation device. According to the dynamic and static performance required by a designer, the design method of the optimal secondary regulator of the dynamic reactive power compensation device can obtain the optimal parameters of a controller by solving the Riccati equation, guarantees the system to have the optimal control performance, achieves the tracing control of an output reactive power by utilizing the function of the optimal secondary regulator, and has quite excellent system performance.

Description

technical field [0001] The invention relates to a design method of a dynamic reactive power compensation device control system in an electric power supply system, in particular to an optimal secondary regulator of a dynamic reactive power compensation device and a design method thereof. technical background [0002] In industrial power systems such as iron and steel, metallurgy, etc., due to load changes, dynamic reactive power compensation needs to be performed on the system. At present, the commonly used control method is to use the PID control algorithm to perform closed-loop control on the system. The tuning aspect is more complicated. Reactive power compensation devices used in engineering practice usually adopt several forms of control strategies such as power factor control, voltage control, and reactive power control. These control strategies have one thing in common, which is to adjust the output of reactive power compensation devices by adjusting the thyristor cont...

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Problems solved by technology

[0002] In industrial power systems such as iron and steel, metallurgy, etc., due to load changes, dynamic reactive power compensation needs to be performed on...

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