Power system additional wide-area damping controller design method giving consideration to time lag

A power system, wide-area damping technology, applied in circuit devices, AC network circuits, reducing/preventing power oscillations, etc., can solve problems such as the optimization design of WADC, the influence of wide-area information control effect is not considered, etc.

Active Publication Date: 2016-09-28
SHANDONG UNIV
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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 optimiza

Method used

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  • Power system additional wide-area damping controller design method giving consideration to time lag
  • Power system additional wide-area damping controller design method giving consideration to time lag
  • Power system additional wide-area damping controller design method giving consideration to time lag

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Embodiment Construction

[0082] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0083] Such as figure 1 Shown: The time-delay link is introduced in the modeling process of the actual large-scale power system. The time-delay power system includes four parts: time-delay-free power system, wide-area feedback time-delay, additional WADC and wide-area output time-delay. The connection relationship between each part is shown in the figure. exist figure 1 middle, y f is the output of the time-delay-free power system, y df To account for the wide-area feedback signal with feedback lag and as input to the damping controller, y c is the output of the wide-area damping controller, y dc The output of the wide-area damping controller to consider the output time lag is also used as the control input of the time-delay-free power system.

[0084]The eigenvalues ​​of the delay system lying in the left half complex plane are mapped to the unit circl...

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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...

Claims

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Application Information

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IPC IPC(8): H02J3/24
CPCH02J3/24H02J2203/20
Inventor 叶华何敏李超牟倩颖刘玉田
Owner SHANDONG UNIV
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