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AC/DC hybrid active power distribution network operation control method

An active distribution network, AC and DC hybrid technology, applied in the field of control, to achieve the effects of load balancing, improvement of consumption capacity, and small active power regulation

Active Publication Date: 2017-04-05
CHINA ELECTRIC POWER RES INST +2
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] In order to fill the gaps in the prior art, the present invention proposes an operation control method for the AC-DC active distribution network, which solves the problems in the operation process of the AC-DC active distribution network and improves the operation of the AC-DC active distribution network. Efficiency and Power Reliability

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  • AC/DC hybrid active power distribution network operation control method
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Embodiment Construction

[0050] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0051] like figure 1 As shown, an operation control method of an AC-DC hybrid active distribution network, the method includes: determining the operation control mode of the AC-DC hybrid active distribution network, formulating strategies for different operation control modes, and adjusting the multi-port flexible DC device Voltage, current and the output of each distributed power supply.

[0052] like figure 2 As shown, the operation control mode includes normal state, pre-warning state, and emergency state; wherein, the pre-warning state is a transformer or line overrun; the emergency state is a load loss based on the N-1 criterion, and a short circuit or open circuit fault.

[0053] The formulating strategy specifically includes: the optimal control strategy of the AC-DC hybrid active distribution network under the normal sta...

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Abstract

The invention provides an AC / DC hybrid active power distribution network operation control method. Three AC / DC hybrid active power distribution network operation control modes: a normal state, an early warning state and an emergency state are included. When the AC / DC active power distribution network is in the normal state, an optimal control strategy with improvement of a distributed power consumption level, realization of load balance and reduction of line loss as targets is built. When the AC / DC active power distribution network is in the early warning state, a DC power flow solution method is applied and an active power sensitivity concept are introduced, the minimum active power regulation amount serves as a target to eliminate hidden safety dangers such as line power flow overload, and a safety coordination control strategy is built. When the AC / DC active power distribution network is in the emergency state, in view of N-1 fault, through calculating the power which needs to be supported by a flexible DC device, a power support strategy is built. Different control strategies in three operation states are integrated, and the power supply reliability and the operation efficiency of the AC / DC hybrid active power distribution network can be improved.

Description

technical field [0001] The invention relates to a control method, in particular to an operation control method of an AC / DC hybrid active distribution network. Background technique [0002] The distribution network is responsible for the distribution of electric energy, and the transmission of electric energy in the traditional distribution network is one-way. With a large number of distributed power sources connected, the electric energy of the distribution network may flow in both directions. Due to the random and intermittent characteristics of distributed power generation, it increases the difficulty of distribution network operation control. In order to meet the requirements of large-scale distributed power access, AC-DC hybrid distribution network came into being. [0003] In the AC-DC hybrid distribution network, the application of flexible DC technology improves the control capability of the distribution network; the active distribution network can use the flexible ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J13/00
CPCY02E40/70Y04S10/50
Inventor 卫泽晨蒲天骄于汀韩巍李洪涛李时光王子安黄仁乐王伟吴新景杜佳桐吴锟
Owner CHINA ELECTRIC POWER RES INST
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