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A power grid operation control system and method including a multi-terminal flexible direct current transmission system

A DC transmission system, multi-terminal flexible technology, applied in the direction of power transmission and AC network, etc.

Inactive Publication Date: 2014-10-08
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For flexible HVDC transmission, especially involving multi-terminal flexible HVDC transmission, mature demonstration projects have not been built worldwide. The control strategy is still in the technical blank

Method used

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  • A power grid operation control system and method including a multi-terminal flexible direct current transmission system
  • A power grid operation control system and method including a multi-terminal flexible direct current transmission system
  • A power grid operation control system and method including a multi-terminal flexible direct current transmission system

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Embodiment Construction

[0062] The specific implementation of the present invention will be further described below in conjunction with the drawings.

[0063] In this embodiment, the target power grid is a power grid formed by connecting a 6-terminal flexible DC transmission system and an AC system. The grid is a mesh structure in which a multi-channel DC transmission network and an AC power grid are coupled, and a grid operation control system including a multi-terminal flexible DC transmission system Including multi-terminal flexible DC transmission system, detection unit, control unit and load;

[0064] The inverter side of the converter end of the multi-terminal flexible DC transmission system is connected to the load, and the inverter side is connected to the AC grid through the grid tie line; the power generation unit of the multi-terminal flexible DC transmission system is mainly a generator, and the power transmission is based on multi-terminal flexible DC The bus is completed in parallel with the...

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Abstract

A power grid operation control system and method including a multi-terminal flexible direct current transmission system, which detects in real time the AC bus voltage, the phase angle of the AC bus and the DC bus voltage at each commutation end of the multi-terminal flexible direct current transmission system; when the power grid fails, when the power grid is temporarily In the state fault operation mode, the transient stability operation control of the power grid is performed; in the static fault operation mode, the static stability operation control of the power grid is performed; the fault information and control information are uploaded to the control center. The power and voltage control decision-making model proposed by the present invention provides a control strategy for the static safety and stability operation decision-making of the power grid including the multi-terminal flexible direct current transmission network, and in the transient fault operation of the power grid, the objective function and boundary conditions are established for the transient stability operation control, By solving the control vector and controlling the corresponding converter terminal through the control vector determined, the multi-terminal DC network voltage stability and the emergency command strategy for the transient fault operation of the AC grid are effectively realized.

Description

Technical field [0001] The invention relates to the field of power grid dispatch control, in particular to a power grid operation control system and method containing a multi-terminal flexible direct current transmission system. Background technique [0002] With the continuous increase of the installed capacity in the power system, the requirements for the transmission capacity of the grid operation are increasing. However, DC transmission has obvious advantages over traditional AC transmission, and the development of flexible DC transmission technology provides a good application space for DC transmission. For HVDC Flexible, it especially involves multi-terminal HVDC Flexible. It has not yet built a mature demonstration project in the world. Therefore, compared with the traditional AC grid dispatching control strategy, the power grid with multi-terminal HVDC transmission network is stable The control strategy is still in a technological gap. Summary of the invention [0003] T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/36
CPCY02E60/60
Inventor 徐建源李家珏齐伟夫张明理
Owner SHENYANG POLYTECHNIC UNIV
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