A Design Method of Additional Wide Area Damping Controller for Power System Considering Time Delay

Abstract

The invention discloses a power system additional wide-area damping controller design method giving consideration to time lag, and the method comprises the steps: (1), enabling an oscillation mode with the weakest damping of a power system to serve as a target control mode, determining the optimal installation positions of AVR and FACTS equipment, further building a power system mode and a WADC model which comprise the AVR and FACTS equipment and do not give consideration to time lag; (2), introducing a time lag link on the basis of the power system mode and the WADC model which comprise the AVR and FACTS equipment and do not give consideration to time lag, and further building a closed loop time lag power system model giving consideration to a time lag factor; (3), building a WADC parameter-optimization mathematic model according to the closed loop time lag power system model; (4), employing a PSO algorithm, and solving the optimal parameters of WADC at step (3). The method gives consideration to the time lag factor in each iteration optimization process, employs the SOD algorithm to solve the key characteristic value of the right side of a closed loop time lag power system, so as to achieve a big purpose that the damping of the key characteristic value is the biggest.

Description

technical field [0001] The invention relates to a design method for an additional wide-area damping controller of a power system considering time lag. Background technique [0002] The complex mechanism and severe operating conditions of the large-scale interconnected grid make it difficult to analyze and control the overall dynamic behavior. The low-frequency oscillation phenomenon that occurs repeatedly in the interconnected power system threatens the safe and stable operation of the power grid, restricts the transmission capacity of some major transmission lines in the region and interval, and makes it difficult to achieve the initial goal of the grid interconnection, the inter-regional power dispatch. [0003] With the continuous development and maturity of Wide Area Measurement System (WAMS) technology, it is one of the development directions of power system to use WAMS in large-scale interconnected power system to form closed-loop control. WAMS can provide real-time i...

AI Technical Summary

Problems solved by technology

Most of these studies use the pole allocation method to design parameters, introduce time-delay factors into the optimization model, or design appropriate time-delay compensation links to improve the robustness and damping effect of the controller. Research Results of Computation-Based WADC Optimal Design

In addition, the existing SVC additional damping controller optimization design method based on WAMS and improved particle swarm optimization algorithm obtains the relevant information of the oscillation mode through the Prony analysis tool, and applies the improved particle swarm optimization algorithm to optimize the control parameters, but this method does not take into account Influence of Wide Area Information Delay on Control Effect

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