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Substation automation system (SAS) with insulation on-line monitoring function for high voltage electric power equipment

A technology for substation automation and high-voltage power equipment, which is applied in the direction of electric power measurement, electric variable measurement, and electricity measurement through current/voltage, and can solve problems that do not cover the online monitoring function of high-voltage power equipment

Inactive Publication Date: 2010-05-19
北京机械工业学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, due to technical reasons, the substation automation system does not cover the online monitoring function of high-voltage power equipment. The substation automation system with online monitoring function is an inevitable trend of technological development.

Method used

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  • Substation automation system (SAS) with insulation on-line monitoring function for high voltage electric power equipment
  • Substation automation system (SAS) with insulation on-line monitoring function for high voltage electric power equipment
  • Substation automation system (SAS) with insulation on-line monitoring function for high voltage electric power equipment

Examples

Experimental program
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Embodiment Construction

[0062] by figure 1 The 110kV substation shown is taken as an example. N sets of monitoring master stations are set in the main control room of the substation, and the addresses of the master stations are set as F1H, F2H, ..., FnH. Configure PMUs at the two main transformers, 110kV incoming circuit breaker, bus tie circuit breaker, 10kV outgoing line circuit breaker, 10kV bus tie circuit breaker, and 10kV factory transformer. Configure IPMU at 110kV PT, 110kV incoming line CT, 110kV incoming line surge arrester, 10kV PT, and 10kV incoming line CT. A2H, ..., sorted in turn. PMU and IPMU are divided into two groups of 110kV and 10kV according to the voltage level. Each of the two groups is provided with a bay layer communication unit BCOM, and the addresses of the two BCOMs are FDH and FEH respectively. In the 110kV group, a PMU of a 110kV main transformer sends voltage synchronized phasors to the IPMU of the 110kV group, and in the 10kV group, a PMU of a 10kV plant transform...

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Abstract

The invention relates to a technology for realizing insulation state on-line monitoring for high voltage electric power equipment in a substation under the architecture of a substation automation system (SAS), and discloses a method, a device and a system of insulation on-line monitoring for high voltage electric power equipment, which realizes synchronized phasor measurement by using a measurement unit at a spacer layer of the SAS and is realized by combining the internal communication of the SAS. The system comprises a monitoring main station at a station control layer, a synchronized phasor measurement unit (PMU) at a spacer layer, and a current synchronized phasor measurement unit (IPMU) which is locally installed dispersedly. The PMU and the IPMU realize the phasor measurement based on clock synchronization, and the PMU realizes the measurement at the spacer layer and the insulation on-line monitoring for main equipment; the IPMU measures the synchronized phasor of the leakage current of capacitive equipment and realizes the insulation on-line monitoring for the capacitive equipment by using the busbar voltage measured by the PMU; and the characteristic quantity of insulation monitoring adopts the variable quantity of leakage active power. The monitor main station, the PMU and the IPMU can also form a special insulation on-line monitoring system for the high voltage electric power equipment.

Description

technical field [0001] The invention relates to insulation monitoring of high-voltage power equipment in substations of electric power systems and power plants, and belongs to the field of state maintenance and on-line monitoring of high-voltage power equipment and the field of substation automation. Background technique [0002] Ultra-high voltage and ultra-high voltage transmission are the characteristics of modern power systems and transmission networks. Higher voltage levels put forward higher requirements for the insulation of power equipment, and at the same time stimulate the application of material science and online monitoring technology. The vast majority of faults in UHV and EHV power grids are manifested as insulation damage, and high-voltage power equipment other than transmission lines are concentrated in substations, including main transformers, high-voltage circuit breakers, current transformers (CT), capacitive voltage Transformer (CPT), bushing, coupling ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01R21/06
Inventor 李娟
Owner 北京机械工业学院
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