SSSC novel nonlinear robust control system and control method thereof

Abstract

The invention provides an SSSC novel nonlinear robust control system comprising a measurement module, a signal analog transformation module, a comparison module, a state space transition module, a central control module, a state space inverse transformation module, a voltage source converter gate trigger and control module and an SSSC module. The signal output end of the measurement module is connected with the signal input end of the SSSC module through the signal analog transformation module, the comparison module, the state space transition module, the control module, the state space inverse transformation module and the voltage source converter gate trigger and control module in turn. The signal output end of the SSSC module is connected with a power transmission system. The nonlinear robust control method is a continuous control method with no requirement for using a boundary function so that the nonlinear physical structure characteristics of a controlled object SSSC can be fully maintained and utilized and real-time control of the SSSC can also be performed.

Description

technical field [0001] The invention relates to the technical field of flexible alternating current transmission, in particular to a novel SSSC nonlinear robust control system and a control method thereof. Background technique [0002] The modern power system is a typical high-dimensional, strongly nonlinear dynamic large system, characterized by large units, ultra-high voltage, long distances, heavy loads, interconnection of large power grids, and combined AC and DC transmission. With the use of various new power equipment and the vigorous development and utilization of renewable energy (such as wind power, photovoltaic power generation, etc.), more and more micro-grids are incorporated into the main grid, making power generation and transmission more economical and efficient. At the same time, it also increases the scale, complexity and uncertainty of the power system. In this case, local faults in the power system (such as short-circuit faults, ground faults, load dips, ...

AI Technical Summary

Problems solved by technology

The SSSC system is a nonlinear system, and there are modeling errors in modeling, and the SSSC device is often affected by external uncertain disturbances during operation. Therefore, when the system is subject to large external disturbances and large (Feedback) linearized controllers do not provide satisfactory control when the range fluctuates

The fuzzy control method mainly has the following disadvantages: 1. The design of fuzzy control still lacks systematicness, which is difficult to be effective for the control of complex systems

Although the generalized Hamiltonian function method is a continuous control method, the generalized term needs to be defined by a boundary function, and the boundary function is difficult to determine

The direct Lyapunov finite-time control method is a discontinuous control method, which cannot retain the nonlinear physical structure characteristics of the SSSC system, and is prone to "chattering" phenomenon

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