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Distributed coordinated voltage control method and system for VSC-HVDC grid-connected wind farm based on MPC and ADMM algorithm

A technology of VSC-HVDC, voltage control method, applied in the direction of AC network voltage regulation, wind power generation, AC network circuit, etc., can solve the problems of increased computing burden and poor scalability.

Active Publication Date: 2019-01-04
SHANDONG UNIV +1
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Problems solved by technology

[0005] As the scale of offshore wind farms continues to expand, the computational burden of traditional centralized control is greatly increased, and its scalability is poor

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  • Distributed coordinated voltage control method and system for VSC-HVDC grid-connected wind farm based on MPC and ADMM algorithm
  • Distributed coordinated voltage control method and system for VSC-HVDC grid-connected wind farm based on MPC and ADMM algorithm
  • Distributed coordinated voltage control method and system for VSC-HVDC grid-connected wind farm based on MPC and ADMM algorithm

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Embodiment Construction

[0069] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0070] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0071] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or c...

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Abstract

The invention discloses a distributed coordinated voltage control method and system for a VSC-HVDC grid-connected wind farm based on an MPC and ADMM algorithm, which includes acquiring system operation state information, calculating voltage sensitivity coefficient, establishing predictive model of wind farm side converter, predictive model of reactive power linearization control of wind turbine generator system and linearized state space model of whole system; Aiming at minimizing the voltage offset and the reactive power fluctuation of wind turbine generator system, taking the reactive powerof wind turbine generator system and the voltage reference value of wind farm converter as decision variables, an optimized mathematical model for coordinated voltage control of the VSC-HVDC grid-connected wind farm based on MPV is established; The optimal mathematical model is solved. The invention disassembles the large-scale constrained optimization problem into an unconstrained optimization problem and a plurality of parallel small-scale constrained optimization problems, reduces the calculation burden of the central controller, and is more suitable for the optimization control of a large-scale offshore wind farm.

Description

technical field [0001] The invention belongs to the field of power system operation control, and in particular relates to a distributed coordinated voltage control method and system for VSC-HVDC grid-connected wind farms based on MPC and ADMM algorithms. Background technique [0002] Wind power generation is one of the most mature and promising methods of large-scale commercial development among new energy technologies. Among them, offshore wind power generation represents the frontier and commanding heights of wind power technology, and will become the focus of future wind power market development. The flexible direct current transmission technology (VSC-HVDC) based on the voltage source converter is developing rapidly. Its advantages lie in the small footprint, the modular structure is easy to construct, the control method is flexible, there is no problem of commutation failure, and it is not affected by the transmission distance. It has become the mainstream technical me...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/16
CPCH02J3/16H02J3/386H02J2203/20Y02E10/76Y02E40/30
Inventor 高厚磊郭一飞邹贵彬
Owner SHANDONG UNIV
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