Reliability assessment scheme for secondary system of intelligent substation

A smart substation and secondary system technology, applied in the direction of instruments, data processing applications, calculations, etc., can solve problems such as component differences and achieve the effect of overall reliability

Inactive Publication Date: 2011-07-27
ELECTRIC POWER RES INST STATE GRID JIANGXI ELECTRIC POWER CO +1
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Problems solved by technology

Compared with conventional protection systems, all-digital protection systems are quite different in terms of system structure and components

Method used

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

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Embodiment Construction

[0015] The implementation process of the smart substation secondary system reliability evaluation scheme in the embodiment of the present invention is as attached figure 1 shown.

[0016] The specific implementation of the smart substation secondary system reliability evaluation scheme of the present invention includes the following steps:

[0017] 1. Reliability modeling of smart substation.

[0018] There are two types of methods for reliability modeling of smart substation systems: combination method and state method. Combination method includes reliability block diagram and fault tree analysis method; state method includes Markov model and Petri net analysis method. The combination method has the advantages of easy understanding and establishment of the model, and a small amount of calculation. However, they all assume that the system is an unrepairable system, so the model is not accurate enough. It is generally used for the preliminary calculation of the reliability o...

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Abstract

The invention discloses a reliability assessment scheme for a secondary system of an intelligent substation. A reliability evaluation model for the secondary system of the intelligent substation is established by utilizing reliability block diagram, connection matrix and minimal path set technologies; overall system reliability is calculated based on the development of device reliability evaluation, component importance analysis is introduced into the secondary system, and component importance evaluation is performed on the secondary system of the intelligent substation by utilizing probability importance and key importance; and according to reliability assessment results, weak links influencing the reliability of the system are analyzed, the reliability of the system is improved by adopting system structure optimization and equipment redundancy measures, and the new needs of the intelligent substation are fully satisfied. The scheme provided by the invention is applied to the reliability assessment of the secondary system of the intelligent substation and a power system.

Description

technical field [0001] The invention relates to a reliability evaluation scheme for a secondary system of an intelligent substation in an electric power system, belonging to the technical field of electric power information automation. Background technique [0002] The promulgation of the IEC 61850 standard, the development of high-speed Ethernet switching technology and the practical application of electronic transformer technology make it inevitable that the substation relay protection system in the power system will move towards full digitalization. The implementation of my country's smart grid strategy also requires the construction of smart substations. In the smart substation, the protection of the secondary system has been fully digitalized. The complex wire connection between the transformer, protection and circuit breaker is replaced by optical fiber. The way of process bus is transmitted to intelligent electronic devices such as protection and measurement and cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/00G06Q50/00
Inventor 苏永春辛建波孙旻郑蜀江
Owner ELECTRIC POWER RES INST STATE GRID JIANGXI ELECTRIC POWER CO
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