Power distribution network feeder interconnection control method based on FMS

A control method and technology for distribution network, applied in the field of distribution network, can solve problems such as failure to achieve active power flow regulation and reactive power compensation, failure to effectively reduce power grid line losses, and failure to effectively relieve upstream pressure on each feeder of the power grid. , to achieve the effect of improving stability and economy, simple scheme and relieving pressure

Pending Publication Date: 2020-09-25
STATE GRID ZHEJIANG ELECTRIC POWER +2
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the existing technology has applied FMS to the distribution network, it cannot achieve active power flow regulation and reactive power compensation well, cannot effectively reduce the loss of power grid lines, and cannot effectively relieve the upstream pressure of each feeder line of the power grid.

Method used

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  • Power distribution network feeder interconnection control method based on FMS
  • Power distribution network feeder interconnection control method based on FMS
  • Power distribution network feeder interconnection control method based on FMS

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Experimental program
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specific Embodiment

[0082] Based on the main circuit diagram of the FMS device, the connection method used is based on the back-to-back voltage source converter structure. When simulating the circuit, set the total capacitance of the DC terminal as C, and the line loss equivalent resistance R of the converter connected to the distribution network 1 =R 2 = R, the filter inductance is L 1 =L 2 = L;

[0083] According to Kirchhoff's voltage law, the dynamic differential equation of the switch in the three-phase stationary system at the AC end of the distribution network feeder is:

[0084]

[0085] In the formula, k=A, B, C, n=1, 2; i kn Indicates the AC current on both sides of the AC terminal of the distribution network; U kn Indicates the AC voltage on both sides of the AC terminal of the distribution network; V kn Indicates the three-phase voltage output by the voltage source converter.

[0086] A kind of specific embodiment of the present invention:

[0087] The three-phase bridge ar...

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Abstract

The invention discloses a power distribution network feeder interconnection control method based on an FMS, and belongs to the technical field of power distribution networks. Although the FMS is applied to the power distribution network in the prior art, active power flow adjustment and reactive power compensation cannot be better realized, the line loss of the power grid cannot be effectively reduced, and the upstream pressure of each feeder line of the power grid cannot be effectively relieved. The power distribution network feeder interconnection control method based on FMS comprises a multi-state switch FMS capable of realizing power flow between feeders and a voltage source type converter used for transmitting active power flow and regulating and controlling electric energy quality. According to the method, the dq coordinate system regulation and control model is established for the power distribution network, and active and reactive decoupling is carried out according to the dq coordinate system regulation and control model, so that the flexible multi-state switch FMS synchronously and independently regulates and controls the active power and the reactive power, and the FMS can synchronously realize active power flow regulation and reactive compensation of the power distribution network.

Description

technical field [0001] The invention relates to an FMS-based feeder interconnection control method of a distribution network, which belongs to the technical field of distribution networks. Background technique [0002] Traditional switches have low sensitivity, and it is difficult to solve the power mutation problem caused by the large-scale access of distributed power to the grid, and it is impossible to achieve more precise regulation. The flexible multi-state switch (flexible multi-state switch, FMS) adopts the new technology of power electronics, which is different from the conventional switch. Flexible and diverse features. Effectively alleviate the phenomenon of voltage sag and three-phase imbalance, promote the equalization of feeder load distribution and the improvement of power quality, and provide key technology and equipment support for the implementation of future smart distribution networks. [0003] Although the existing technology has applied FMS to the dist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/06H02J3/16
CPCH02J3/06H02J3/16H02J2203/20Y02E40/30
Inventor 杨勇李继红周自强陆翌许烽周兴华郭晶晶张文斌
Owner STATE GRID ZHEJIANG ELECTRIC POWER
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