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Node injection power-based running topology identification method of power distribution network

A technology of node injection power and identification method, which is applied in the field of power system analysis and calculation, and can solve the problem that it is difficult to obtain the voltage measurement data of each node.

Active Publication Date: 2017-12-08
HOHAI UNIV
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Problems solved by technology

Obviously, most of foreign distribution network topology identification studies are based on node voltage measurement, but it is difficult to obtain the voltage measurement data of each node in the actual distribution network.

Method used

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  • Node injection power-based running topology identification method of power distribution network
  • Node injection power-based running topology identification method of power distribution network
  • Node injection power-based running topology identification method of power distribution network

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Embodiment Construction

[0079] The implementation of the present invention will be further described below in conjunction with the accompanying drawings and examples, but the implementation and inclusion of the present invention are not limited thereto.

[0080] A distribution network operation topology identification method based on node injected power, comprising the following steps:

[0081] 1) First, construct a network model based on the correlation matrix from the original ring network structure of the distribution network and the impedance information of the line;

[0082] 2) Construct a linearized relationship model between node voltage and node injected power;

[0083] 3) Construct the variance model of branch voltage deviation based on node injection power measurement

[0084] 4) On this basis, the variance formed by the collected node injection power is set as the line weight, and the identification of the operating topology of the distribution network is realized through the Kruskal algo...

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Abstract

The invention discloses a node injection power-based running topology identification method of a power distribution network. The node injection power-based running topology identification method comprises the steps of building a variance mode of node injection power measurement-based branch voltage deviation according to node injection powers sampled for many times by a miniature synchronous phase measurement unit Mu PMU; obtaining minimum spanning tree taking variance of the branch voltage deviation as a circuit weight by employing a Kruskal algorithm to achieve identification on a topological running structure of the power distribution network; and comparing and analyzing the sampling frequency of node injection power measurement and influence of network complexity on an topological identification error. A simulation result shows that the algorithm has relatively good reliability and practicability on running topological identification of the power distribution network.

Description

technical field [0001] The invention relates to a distribution network operation topology identification method based on node injected power, which belongs to the field of power system analysis and calculation. technical background [0002] The distribution network is at the end of the power supply chain and directly serves the power customers. Its construction level is directly related to the power supply capacity, power supply reliability and power quality of the power network. Distribution network topology identification is the basis for various analysis and calculation of distribution network, such as state estimation, power flow calculation, and network reconfiguration. Correct topology information is the prerequisite for various analysis and calculation of distribution network. [0003] There are many researches on distribution network topology error identification at home and abroad. The identification of topology errors based on the results of state estimation will l...

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Application Information

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IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20Y02E60/00
Inventor 余昆梅睿陈星莺
Owner HOHAI UNIV
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