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Substation measurement information based method for estimating local topology of electric power system

A local topology and substation technology, applied in the field of transmission network local topology estimation, can solve problems such as poor tolerance to tolerance and inability to give accurate and reliable estimation results

Active Publication Date: 2013-11-27
NORTHEAST CHINA GRID +1
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Problems solved by technology

However, this method has poor tolerance to errors, and it cannot give accurate and reliable estimation results when the input measurement data has large errors

Method used

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  • Substation measurement information based method for estimating local topology of electric power system
  • Substation measurement information based method for estimating local topology of electric power system
  • Substation measurement information based method for estimating local topology of electric power system

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Embodiment Construction

[0039] Specific implementation plan

[0040] Attached below figure 1 The method for estimating the local topology of the transmission network based on the measurement information of the substation provided by the present invention will be described in further detail.

[0041] The specific implementation steps of the method for estimating the local topology of the transmission network based on the measurement information of the substation provided by the present invention are as follows:

[0042] 1. Obtain the measurement data in the substation through the SCADA system, including remote measurement data and remote signaling data. The remote measurement data refers to active power, reactive power, current, etc. The remote signal data refers to the on-off state of the switch.

[0043] 2. Whole network topology analysis: The whole network topology analysis technology is a mature network analysis technology in the power grid energy management system (EMS), which uses the remote measuremen...

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Abstract

The invention provides a substation measurement information based method for estimating the local topology of an electric power system. According to the method, logical analysis is performed on remote-measurement and remote-communication data of the electric power system, which are collected by a supervisory control and data acquisition (SCADA) system, the suspicious remote-measurement and remote-communication data are discriminated, substations which the suspicious data belong to are positioned, a linear programming model is established through power and current measurement data which are collected in the single substation or a plurality of adjacent substations in real time, real-time estimation is performed on a local topological structure of a transmission network, and errors in the data are corrected. According to the method, topology errors in the substations can be identified accurately through a principle of optimality, reliable input data can be provided for state estimation procedures, then interference of suspicious measurements is reduced, and local errors are prevented from affecting global results.

Description

Technical field [0001] The invention relates to a method for estimating the local topology of a transmission network based on measurement information of a substation, which belongs to the field of power systems and their automation in the field of electrical engineering, and particularly relates to network topology estimation technology in the problem of power system state estimation. Background technique [0002] Power system state estimation is a necessary basic function of energy management system (EMS). It uses various measurement data collected in real time by the power system as input, through data preprocessing, topology analysis, state estimation calculation, and bad data identification. The final output includes the voltage amplitude and phase angle of all nodes in the system, the active power, reactive power and current of all connected components, the power of all power generation and load equipment, and the complete and reliable real-time power system including the net...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 徐兴伟王立鼎邵广惠齐文斌侯凯元李志学岳涵张小玲夏德明孔洋洋王肇光杨宁易善军郭艳娇李满坡王刚贾伟李泽宇马新孟令愚刘家庆高德宾吴远志周莹王克非
Owner NORTHEAST CHINA GRID
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