Electromagnetic looped network reactive power ring current optimal control method based on flexible looped network controller

A technology of flexible ring network and electromagnetic ring network, which is applied in the direction of reactive power adjustment/elimination/compensation, reactive power compensation, AC network circuit, etc., and can solve the problem that there is no application for the solution of AC power grid.

Inactive Publication Date: 2015-01-07
STATE GRID CORP OF CHINA +2
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Problems solved by technology

[0003] At present, judging from the existing flexible DC transmission projects and their technical characteristics in operation, the flexible DC transmission te

Method used

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  • Electromagnetic looped network reactive power ring current optimal control method based on flexible looped network controller
  • Electromagnetic looped network reactive power ring current optimal control method based on flexible looped network controller
  • Electromagnetic looped network reactive power ring current optimal control method based on flexible looped network controller

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Embodiment Construction

[0049] In the electromagnetic ring network, the flexible ring network controller is used to suppress the reactive power circulation:

[0050] ① Determine the topology of the ring network controller and the valve level control strategy.

[0051] ② Combining the MMC-HVDC steady-state transmission mathematical model and the reactive power circulation mathematical model in the electromagnetic ring network, the reactive power circulation optimization objective function and constraint conditions of the flexible ring network controller are derived.

[0052] ③ Since the constraint conditions of the objective function contain many discrete variables, in order to improve the global convergence effect of the algorithm solution, the catastrophe genetic algorithm is used to optimize the objective function.

[0053] ④The power transmission process of the flexible ring network controller is limited by the line current, and according to its different current limiting methods, the reactive pow...

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Abstract

The invention discloses an electromagnetic looped network reactive power ring current optimal control method based on a flexible looped network controller, and belongs to the technical field of electric power system analysis, operation and control. According to a high-low voltage electromagnetic looped network system, the flexible electric power transmission technology and the optimal load flow calculation method are used for optimally controlling the reactive power distribution electromagnetic looped network reactive power ring current optimal control method based on the flexible looped network controller in an electromagnetic looped network. The method includes the steps that first, the topological structure and the valve level control strategy of the looped network controller are determined; second, the reactive ring current optimized objective function and the constraint condition of the flexible looped network controller are deduced; third, a cataclysmic genetic algorithm is used for optimizing the objective function; fourth, based on an original current converter level control strategy, the current control regulation strategy is added. The electromagnetic looped network reactive power ring current is restrained, and thus the electromagnetic looped network can operate more economically and stably.

Description

technical field [0001] The invention belongs to the technical field of power system analysis, operation and control. Background technique [0002] In the initial stage of the development of the high-level voltage power grid, the high and low voltage electromagnetic ring network passes through a small flow, and its existence can improve the reliability and flexibility of the power supply of the power grid. Generally speaking, as long as it does not affect the safe and stable operation of the power grid and is not limited by the short-circuit capacity, the operation of the electromagnetic ring network can be maintained. However, with the development of high-level voltage power grids, the transmission load continues to increase, and the electromagnetic ring network has become a serious accident hazard in the power system, which has brought many problems to the operation of the power grid. Among them, the formation of the high and low voltage electromagnetic ring network has a ...

Claims

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Application Information

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IPC IPC(8): H02J3/18
CPCY02E40/30H02J3/1878H02J3/1892
Inventor 高凯李国庆刘博文张艳军王振浩韩子娇何晓洋王朝斌
Owner STATE GRID CORP OF CHINA
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