Flexible looped network control system operation and power flow optimization method

A flexible ring network and control system technology, applied to AC network circuits, power transmission AC networks, electrical components, etc., can solve problems such as lack of theoretical support, excessive short-circuit current, and insufficient power supply capacity of the grid

CN104269847AActive Publication Date: 2015-01-07STATE GRID CORP OF CHINA +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-01-07

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Abstract

The invention discloses a flexible looped network control system operation and power flow optimization method, and belongs to the field of electric power system operation and power flow optimization. The method solves the problem of reasonable system active power flow allocation problem under the normal and fault conditions of the flexible looped network control system. The method includes the steps that network parameters of a target power grid are obtained in real time based on a D5000 system; according to the obtained power grid basic parameters, the element load rate and the system power supply capacity serve as target conditions, and corresponding target functions are built; a multi-target optimization function is determined based on all the target functions; according to a fuzzy theory, subordinating degree functions of all the target functions are made, and the optical solution of the multi-target optimization function is obtained through a fuzzy algorithm. According to the method, the multiple target functions serve as constraint conditions, the optimal power flow allocation under the normal and fault operation conditions of the flexible looped network control system is obtained, and the reliability and economy of power grid operation are improved.
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Description

technical field

[0001] The invention belongs to the field of power system operation and power flow optimization, in particular to a flexible ring network control system operation and power flow optimization method. Background technique

[0002] With the rapid development of the power system, the grid structure of the urban power grid has become stronger, which has greatly improved the power supply capacity and reliability of the power grid. But at the same time, it will inevitably cause the problem of excessive short-circuit current in the power grid. If the open-loop operation of the grid is used to solve the problem of excessive short-circuit current, it will bring great difficulties to the grid power supply capacity, power supply reliability, and grid scheduling flexibility. How to coordinate the power supply capacity of the power grid and the short-circuit current exceeding the standard is a major problem facing the current power grid dispatching operation. The traditi...

Examples

Embodiment Construction

[0046] The invention relates to a flexible ring network control system operation and power flow optimization method. Through real-time calculation of each subnet of the target power grid, the load rate of each component and the balance of supply and demand of the subnet are analyzed at each moment, and a multi-objective method with innovative ideas is adopted. The power flow optimization method of the flexible ring network control system realizes the optimization of the active power of the power grid and improves the reliability and economy of the power grid operation.

[0047] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0048] In this embodiment, taking the grid structure of an actual power grid as an example, the flexible ring network controller proposed by the present invention is installed at a 220 kV busbar of a substation, and the original power grid is divided into two subnets. When the power ...