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Topology Identification Method of Distribution Network Containing dg Based on Innovation Graph Method

An identification method and technology of distribution network, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of reduced power supply reliability, low measurement data requirements, long fault processing time, etc., to achieve easy engineering Simple in practice, principle, and the effect of reducing the long time of troubleshooting

Active Publication Date: 2017-12-08
GUANGZHOU POWER SUPPLY CO LTD +2
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  • Description
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AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in the present invention is to provide a method that requires less measurement data and can accurately identify the topology of the distribution network containing DG, so as to avoid long fault processing time and Reduced power supply reliability occurs

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  • Topology Identification Method of Distribution Network Containing dg Based on Innovation Graph Method
  • Topology Identification Method of Distribution Network Containing dg Based on Innovation Graph Method
  • Topology Identification Method of Distribution Network Containing dg Based on Innovation Graph Method

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Embodiment Construction

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

[0044] In the process of distribution network topology identification, topology error can be defined as the fact that the switch does not change position and the information uploaded by the terminal reflects the change of the switch state, that is, the topology error is reported and the topology change occurs in the actual system, but due to communication interruption and other reasons, the main station system There is no corresponding reaction, i.e. no topology error is reported. It is easy to handle the case of reporting topology errors, but it is most difficult to identify the case of sudden disconnection without reporting errors in the case of non-reporting topology errors. Reporting a topology error is simply called a snapped topology error.

[0045] A topology identification method for distribution network with DG based on innova...

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Abstract

The invention discloses an innovation graph method based DG (distributed generation) power distribution network included topology identification method. The method specifically includes the steps: modeling a power distribution network and determining links and branches; calculating state estimation results of k time; calculating innovation values with measuring branch circuits; calculating the calculated innovation values of the whole network; calculating difference vectors of the branches equipped with measurement; judging whether part of the branch circuits are great in difference vectors and exist independently or not; judging whether the branch circuits with large difference vectors form bad circuits or not; regaining the calculated innovation values of the whole network after eliminating impact of bad data; calculating estimation trend; judging whether the DG is achieved in small-power situation or not; judging whether innovation values of links of the DG are not zero; judging whether branch circuits with calculated innovation absolute values great and estimation tread values small and close to zero exist or not; recognizing topology error branch circuits according to the judgment results. The method is applicable to the DG power distribution network included topology identification, low in measurement configuration requirement and easy for engineering practice.

Description

technical field [0001] The invention relates to a topology identification method of a distribution network, in particular to a topology identification method for a distribution network containing DG and lacking measurement information. Background technique [0002] At present, centralized power generation, long-distance power transmission and interconnection of large power grids in the power system have shown great advantages in terms of resource allocation and system stability, but there are disadvantages such as local accidents are easy to spread and cause large-scale power outages. With the depletion of conventional energy sources and increasing environmental pollution, environmentally friendly, efficient and flexible distributed generation (Distributed Generation, DG) has attracted the attention and attention of countries all over the world, and has developed rapidly in recent years. [0003] Distributed power generation generally refers to a small power generation syste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCY02E60/00
Inventor 陆宏治梁东贵梁哲辉陆慧邹时容陈春芳秦滔吴春林肖玲
Owner GUANGZHOU POWER SUPPLY CO LTD
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