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Alternating current-direct current active electric power distribution network voltage and reactive power coordinated control method

An active distribution network, voltage reactive technology, applied in the field of control, can solve the problem of rare flexible DC devices

Inactive Publication Date: 2016-11-16
CHINA ELECTRIC POWER RES INST +4
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Problems solved by technology

At present, in the research on the voltage control strategy of the distribution network, the research on mining the reactive capacity of the flexible DC device and using it to participate in the coordinated control of the voltage and reactive power of the active distribution network is relatively rare.

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  • Alternating current-direct current active electric power distribution network voltage and reactive power coordinated control method
  • Alternating current-direct current active electric power distribution network voltage and reactive power coordinated control method
  • Alternating current-direct current active electric power distribution network voltage and reactive power coordinated control method

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Embodiment Construction

[0043] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0044] Such as figure 1As shown, the present invention provides a voltage and reactive power coordination control method based on the AC-DC active distribution network, the method includes dividing the distribution network operating state, formulating control strategies for different operating states, and using different control strategies to The reactive power coordination control is carried out for the distribution network voltage under different operating states.

[0045] Dividing the operating state of the distribution network includes dividing the operating state of the distribution network into normal state, early warning state and emergency state according to the voltage level of each node in the distribution network; among them,

[0046] If the node voltages all meet 0.95p.u.≤U i ≤1.05p.u. range, it means that the distrib...

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Abstract

The invention puts forward an alternating current-direct current active electric power distribution network voltage and reactive power coordinated control method comprising the following steps: electric power distribution network voltage running states are segmented into three bands that are respectively a normal state, an early warning and an emergency state according to node voltage levels of an electric power distribution network; in the normal state, global optimization operation is perform, dynamic reactive power of a flexible direct current device is replaced with static state reactive power of a discrete reactive power device, and a dynamic reactive reserve capacity of the electric power distribution network can be improved; in the early warning state, intercoordination of local control and centralized control is realized via multiple reactive power sources, and voltage threshold-crossing nodes can be corrected in the early warning state; in the emergency state, the flexible direct current device is used for providing emergency support to the voltage threshold-crossing nodes, and the electric power distribution network is enabled to transit to the early warning state till the electric power distribution network goes back to the normal state.

Description

technical field [0001] The invention relates to a control method, in particular to a voltage and reactive power coordination control method based on AC and DC active distribution networks. Background technique [0002] With the increasingly serious problems of environmental pollution and energy crisis worldwide, new energy power generation represented by photovoltaic and wind power is developing rapidly. With the opening of the market, the penetration rate of Distributed Generation (DG) in the distribution network has gradually increased, which has brought huge technical and environmental benefits to the distribution network. However, due to the strong randomness and volatility of distributed power output due to the constraints of meteorological conditions, the output fluctuations of distributed power and rapid changes in load will cause some node voltage fluctuations or even exceed the limit in the distribution network, affecting the power supply. quality. [0003] The fl...

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Application Information

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IPC IPC(8): H02J3/16
CPCH02J3/16Y02E40/30
Inventor 于汀蒲天骄李时光王子安韩巍王伟付云琦卫泽晨吴新景杜佳桐赵涌泉穆云飞王明深黄仁乐王旭东吴锟
Owner CHINA ELECTRIC POWER RES INST
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