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A self-storage multi-terminal flexible straight system control method and device

A control method and energy storage device technology, applied in the direction of power transmission AC network, etc., can solve problems such as power oscillation and voltage fluctuation, and achieve the effect of improving robustness and dynamic response performance

Active Publication Date: 2021-05-11
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +4
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Problems solved by technology

[0004] In view of the above problems, the present invention proposes a self-storage multi-terminal back-to-back flexible direct control method and device, which solves the problems of power oscillation and voltage fluctuation caused by system mode switching, and improves the robustness and dynamic response performance of the system

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  • A self-storage multi-terminal flexible straight system control method and device
  • A self-storage multi-terminal flexible straight system control method and device
  • A self-storage multi-terminal flexible straight system control method and device

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[0102] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0103] The application principle of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0104] The self-storage multi-terminal flexible straight system control method and device proposed by the present invention study the unified coordinated control of the energy storage device and the multi-terminal flexible straight system. Reasonably combine the strategies, design the working curves of the master-slave converter and the energy storage device separately, use a reasonable control method to make the self-storage multi-terminal flexible straight system run stably under dif...

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Abstract

The invention discloses a control method and device for a self-storage multi-terminal flexible straight system. On the basis of establishing a mathematical model of a self-storage multi-terminal flexible straight system, a coordinated control strategy based on voltage margin control is proposed, and the typical operation of the system Model design control strategy, detailed analysis of the working principle of the system, so that the system can run stably under different working conditions. Designing a command filtering back-push voltage controller solves the problem of power oscillation and voltage fluctuation caused by system mode switching, and improves the robustness and dynamic response performance of the system. The simulation verifies the feasibility and effectiveness of the proposed method, and provides a theoretical basis and technical support for the coordinated control of the self-storage multi-terminal flexible straight system.

Description

technical field [0001] The invention belongs to the technical field of flexible direct current transmission, and in particular relates to a control method and device for a self-storage multi-terminal flexible direct current system. Background technique [0002] The distribution network is connected to the main grid frame of the distribution network and connected to thousands of enterprises and households. It is a key link to connect the main network, various users and distributed energy. In recent years, my country's electric power industry has developed vigorously, and the structure of power grids at all levels has been significantly strengthened. However, with the sustained and rapid development of the economy and society, high-reliability power supply and high-penetration distributed energy friendly access have put forward higher requirements for the construction and operation of distribution networks. Compared with the traditional two-terminal flexible DC transmission s...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/36
CPCH02J3/36Y02E60/60
Inventor 葛乐韩华春李强吕振华褚国伟许建明
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST
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