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Reliability assessment method for secondary system of intelligent substation

A technology of intelligent substation and secondary system, applied in the direction of information technology support system, electrical components, circuit devices, etc., can solve the problems of imperfect reliability management of secondary system, failure of secondary system reliability management, etc., and achieve convenience Reliability calculation or analysis, improving reliability and availability, and facilitating the effect of eliminating interference

Inactive Publication Date: 2012-10-10
SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the reliability management of the power system is mostly carried out for the primary system, and the reliability management for the secondary system is still not perfect, especially the reliability management of the secondary system of the intelligent substation has not yet been carried out.

Method used

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  • Reliability assessment method for secondary system of intelligent substation
  • Reliability assessment method for secondary system of intelligent substation
  • Reliability assessment method for secondary system of intelligent substation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0152] The network structure of the networking mode is as follows: Figure 9 shown.

[0153] This networking method is relatively simple. There is only one minimum road set: TS1→MU1→EM1→SW1→PR1→BCU1. Because there is no parallel line or ring network, a failure of a device in the minimum road set will It has a great impact on the entire network, and the calculation result of the mean time to failure (MTTF) is 21.74 years. When the equipment in the network is used for different times, the system unreliability curve formed is as follows Figure 10 shown.

Embodiment 2

[0155] The network structure of networking method 2 is as follows: Figure 11 shown.

[0156] Due to the existence of parallel lines in some sections of this networking mode, when a certain device in the section fails, the load it carries can be transferred by the parallel line. There are 4 minimum road sets in networking mode 2, which are:

[0157] 1) TS1→MU→EM→SW→PR1→BCU1

[0158] 2) TS1→MU→EM→SW→PR2→BCU2

[0159] 3) TS2→MU→EM→SW→PR1→BCU1

[0160] 4) TS2→MU→EM→SW→PR2→BCU2

[0161] The calculation result of the mean time to failure (MTTF) is 45.29 years. When the equipment in the network is used for different times, the curve of system unreliability is as follows: Figure 12 shown.

Embodiment 3

[0163] The network structure of networking method 3 is as follows: Figure 13 shown.

[0164] Because there is a ring network in this networking mode, when any device in the network fails, the load carried by the subsequent lines can be transferred by other lines. There are 8 minimum road sets in networking mode 3, which are:

[0165] 1) TS1→MU1→EM1→SW1→PR1→BCU1

[0166] 2) TS1→MU1→EM1→SW1→SW2→PR2→BCU2

[0167] 3) TS1→MU2→EM2→SW2→SW1→PR1→BCU1

[0168] 4) TS1→MU2→EM2→SW2→PR2→BCU2

[0169] 5) TS2→MU2→EM2→SW2→PR2→BCU2

[0170] 6) TS2→MU2→EM2→SW2→SW1→PR1→BCU1

[0171] 7) TS2→MU1→EM1→SW1→PR1→BCU1

[0172] 8) TS2→MU1→EM1→SW1→SW2→PR2→BCU2

[0173] The calculation result of the mean time to failure (MTTF) is 51.29 years. When the equipment in the network is used for different times, the curve of system unreliability is as follows: Figure 14 shown.

[0174] It can be obtained from the above-mentioned embodiments that, with the change of the network structure, its mean time to ...

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Abstract

The invention provides a reliability assessment method for a secondary system of an intelligent substation, and belongs to the field of power information automation. The assessment method divides the intelligent substation system into a communication subsystem, a control subsystem, a protection subsystem and a station control layer subsystem, obtains reliable parameters of each subsystem with the aid of the mean time to fail and the mean time to repair parameters of devices by an availability block diagram, finds out weak links of the secondary system, and improves the reliability of the secondary system of the intelligent substation, thereby achieving the purpose of increasing the quality of power supply at last, and providing an easily accepted and implemented reliability assessment method of the secondary system for the reliability assessment of the secondary system of the intelligent substation. By introducing a notion of reliability model, carrying out quantitative calculation and evaluation, and conducting sequence according to the reliability indexes and the degrees of risk, the reliability and availability of the whole intelligent substation system are improved. The assessment method of the invention can be widely applied in the system design, operation scheduling or device management fields of intelligent substation.

Description

technical field [0001] The invention belongs to the field of electric power information automation, and in particular relates to a data processing method for evaluating the reliability of a secondary system of an intelligent substation. Background technique [0002] Substation operation is the most important link in the operation of the power system. The voltage level of a substation is determined by the voltage level of the grid where it is located. The security of the power supply area maintained by substations of different voltage levels is also different. The higher the voltage level, the larger the power supply area of ​​the substation, and the higher the safety and reliability it needs, and the protection configuration of the secondary system in the substation plays a vital role in the safe operation of the substation. [0003] The reliability management of the power system is an important guarantee for the safe operation of the power system. The reliability of the po...

Claims

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Application Information

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IPC IPC(8): H02J13/00
CPCY02E60/723Y04S10/16Y04S40/124Y02E60/00
Inventor 陈金木王伟张劲松衣涛王艳杰黄起强廖祖金王锦标
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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