Improved TLBO-based parameter optimization method for PI controller of flexible high-voltage DC power distribution system

A technology of high-voltage direct current transmission and system controller, which is applied in the direction of AC network circuits, circuit devices, power transmission AC networks, etc.

Inactive Publication Date: 2018-09-28
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

[0004] This algorithm can effectively solve the global optimal problem of continuous nonlinear functions, and has outstanding advantages such as fast calculation speed and high solution quality, but it is easy to fall into local convergence

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  • Improved TLBO-based parameter optimization method for PI controller of flexible high-voltage DC power distribution system
  • Improved TLBO-based parameter optimization method for PI controller of flexible high-voltage DC power distribution system
  • Improved TLBO-based parameter optimization method for PI controller of flexible high-voltage DC power distribution system

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Embodiment Construction

[0065] The present invention will be further described below in combination with the accompanying drawings and specific embodiments.

[0066] A parameter optimization method for PI controller of flexible HVDC transmission system based on improved TLBO algorithm:

[0067] (1) Establish the controller model of the flexible HVDC transmission system;

[0068] (2) Make improvements to the basic TLBO algorithm;

[0069] (3) The improved TLBO algorithm is used to optimize the parameters of the PI controller of the flexible HVDC transmission system, the optimization model is established, and the optimization results are obtained.

[0070] In the step (1), the controller of the flexible HVDC transmission system is composed of two parts, namely the rectifier control and the inverter controller. The method for establishing the controller model of the flexible HVDC transmission system is as follows:

[0071] (1) Establish the basic dynamic model of flexible HVDC transmission system

[...

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Abstract

The invention relates to an improved TLBO-based parameter optimization method for a PI controller of a flexible high-voltage DC power distribution system, and belongs to the technical field of power system control. The improved TLBO-based parameter optimization method is implemented according to the steps of (1) building a VSC-HVDC system simulation model; (2) improving basic TLBO; and (3) allowing the improved TLBO to be used for parameter optimization of the PI controller of the VSC-HVDC system, building an optimization model and obtaining an optimization result. On the basis of the basic TLBO, a plurality of classes are introduced to expand the optimal searching range, a small world network is built among teaches or students in different classes, accurate searching is achieved by deep interaction learning, and local optimal algorithm is effectively prevented; controlled quantity of a VSC-HVDC system is brought to the optimization model, and the optimal parameter of the PI controlleris solved by the improved TLBO; the embodiment shows that the searching range and the searching accuracy of the optimal parameter of the PI controller in the VSC-HVDC system can be reasonably balanced by the improved TLBO, and local optimal algorithm is effectively prevented.

Description

technical field [0001] The invention relates to a parameter optimization method of a PI controller of a flexible high-voltage direct current transmission system based on an improved TLBO algorithm, and belongs to the technical field of power system control. Background technique [0002] In recent years, global attention to power grid security and environmental protection has been increasing, making HVDC transmission technology gain widespread attention and research worldwide. Due to large-scale wind power grid connection, fast power flow adjustment of AC system, long-distance power transmission, and weak damping system interconnection, the demand for power supply in multi-infeed or weakly infeed areas is increasing day by day. Flexible high-voltage direct current transmission system (referred to as VSC-HVDC) With increasing attention, a rational design of the control system is crucial to the optimal operation of VSC-HVDC. The dynamic characteristics of the converter make th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/36
CPCH02J3/36H02J2203/20Y02E60/60
Inventor 束洪春张瑞颖杨博
Owner KUNMING UNIV OF SCI & TECH
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