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Fault feed line positioning method suitable for power distribution network with high proportion of connected distributed power supplies

A technology of distributed power supply and distribution network, applied in fault location, fault detection by conductor type, information technology support system, etc., can solve problems such as real-time processing of unfavorable power grid faults, slow convergence speed, etc., to avoid accidents and converge The effect of increased speed

Active Publication Date: 2018-12-07
河北科讯通信器材有限公司
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Problems solved by technology

On the other hand, the intelligent bionic algorithm currently proposed has the problem of slow convergence speed when dealing with the distribution network containing DG, which is not conducive to the real-time performance of power grid fault processing

Method used

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  • Fault feed line positioning method suitable for power distribution network with high proportion of connected distributed power supplies
  • Fault feed line positioning method suitable for power distribution network with high proportion of connected distributed power supplies
  • Fault feed line positioning method suitable for power distribution network with high proportion of connected distributed power supplies

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Embodiment Construction

[0034] The present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0035] A method for locating faulty feeders suitable for accessing a distribution network with a high proportion of distributed power sources, comprising the following steps:

[0036] Step 1: Build a distribution network topology model diagram with a high proportion of DG; figure 2 As shown, V in the figure represents the system power supply, and DG1, DG2, and DG3 represent the distributed power supply. K is the grid-connected switch of the distributed power supply. L 1 , L 2 ,...,L 33 is the feeder number in the distribution network, S 1 , S 2 ,...,S 33 For subsection switches, it is assumed that each subsection switch is equipped with an FTU to detect fault current. It is generally stipulated that the direction of the current from V to the distributed power supply is the positive direction;

[0037] Step 2: Construct switch functio...

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Abstract

The invention discloses a fault feed line positioning method suitable for a power distribution network with high proportion of connected distributed power supplies. The method comprises the steps of constructing a power distribution network topology model graph which comprises high-proportion DG; constructing a switching function according to the constructed power distribution network model; constructing a fitness function according to the constructed power distribution network model; performing coding on the constructed model, namely performing quantum bit coding through using a wire inlet breaker, a section switch and a connecting switch of each feed line segment of the power distribution network as nodes; and when a true fault of a certain feed line occurs, performing the following fault determining steps according to an actual operation condition: reading the on-off state value of each breaker, the section switch and the distributed power supply connecting switch by an FTU system,and transmitting to a main station; after the main station receives fault information, performing simulation verification by means of a quantum genetic program; outputting a result, reading the faultfeed line and determining the fault switch. According to the method of the invention, fault positioning time is reduced through the improved quantum genetic algorithm, and real-time performance in fault positioning of the power distribution network is improved.

Description

technical field [0001] The invention belongs to the technical field of power system transmission and distribution protection control, and in particular relates to a method for locating a fault feeder suitable for connecting a distribution network with a high proportion of distributed power sources. Background technique [0002] In recent years, due to the lack of primary energy and the increasingly serious environmental pollution problems on a global scale, many countries are actively accelerating energy transformation, developing more green, reliable and clean energy and trying to connect to the distribution network to ensure the future sustainable economic and social development of the country. However, when the traditional distribution network is added with a high proportion of distributed power sources, the topology of the distribution network will become more complex and diversified, resulting in an increase in its voltage level, bidirectional power flow, increase in sh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCG01R31/086Y04S10/52
Inventor 余向阳王旭海薛媛
Owner 河北科讯通信器材有限公司
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