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An evaluation method for the type selection of protection equipment for 35/0.4kv direct distribution station

A technology for protection equipment and station areas, applied in the direction of emergency protection circuit devices, instruments, electrical components, etc., can solve problems such as increasing the cost of power grid construction, not being widely used in power grid construction in remote areas, and having no system evaluation plan for protection equipment selection, etc. To achieve the effect of ensuring safe and reliable operation

Active Publication Date: 2015-12-02
STATE GRID CORP OF CHINA +2
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AI Technical Summary

Problems solved by technology

This type of protection equipment is suitable for important users with large load fluctuations and high power supply reliability requirements. However, due to excessive reliance on the equipment's own function (relay protection device), there is no systematic evaluation plan for the selection of protection equipment, and it will greatly increase the cost of power grid construction. , cannot be widely used in power grid construction in remote areas

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  • An evaluation method for the type selection of protection equipment for 35/0.4kv direct distribution station
  • An evaluation method for the type selection of protection equipment for 35/0.4kv direct distribution station
  • An evaluation method for the type selection of protection equipment for 35/0.4kv direct distribution station

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Embodiment Construction

[0054] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0055] The invention provides an evaluation method for selection of protective equipment in 35 / 0.4kV direct distribution station area suitable for 35kV power distribution construction. The method includes two parts: 1. Proposing a fuse section protection scheme; 2. Evaluating various protection equipment selection schemes through the integration of power supply-grid-load. First determine the set of influencing factors for the selection of protection equipment in the 35 / 0.4kV direct distribution area; analyze the ampere-second characteristics of the fuse, and propose a coordination scheme for the use of fuse segment protection; the 35kV side adopts the combination of inserting fuses and backup fuses The 0.4kV side adopts the configuration method to prevent the low-voltage main switch from leapfrog tripping; a typical sele...

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Abstract

The invention relates to the field of 35kV power distribution construction, in particular to an assessment method for 35 / 0.4kV rection station area protection equipment selection. The method comprises the following steps of: (1) confirming influencing factors of 35 / 0.4kV rection station area protection equipment selection in the 35kV power distribution construction; (2) providing a 35 / 0.4kV rection station area fuse wire sectionalized protection scheme; (3) confirming weights of the influencing factors of 35 / 0.4kV rection station area protection equipment selection, and establishing an analytic hierarchy process assessment model; (4) assessing 35 / 0.4kV rection station area protection equipment selection based on integration of power supply-power grid-load; and (5) completing the 35 / 0.4kV rection station area protection equipment selection. According to the assessment method for the 35 / 0.4kV rection station area protection equipment selection, the problem of contradictoriness of reliability and economical efficiency of the 35 / 0.4kV rection station area protection configuration in 35kV power distribution can be solved, and the reliability and economical efficiency of power supply in the 35kV power distribution construction can be effectively improved.

Description

technical field [0001] The invention relates to the field of 35kV power distribution construction, in particular to an evaluation method for type selection of protection equipment in 35 / 0.4kV direct distribution station area. Background technique [0002] In some areas, the geographical location is relatively remote, the economic development is slow, the grid power supply is insufficient, or there is a circuitous power supply of 10kV lines, resulting in long power supply radius and large line loss, resulting in the inability of residents along the line to use electricity or low power supply voltage, which seriously affects the normal life of residents. Production and living. The construction of 35kV power distribution means that the 35kV power grid adopts the standard construction of 10kV distribution network. The station area refers to the distribution station area that extends the 35kV line to the load center and uses the 35 / 0.4kV distribution transformer to directly supp...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/22G06Q50/06
Inventor 寇凌峰盛万兴宋祺鹏王金丽王金宇方恒福徐毅虎
Owner STATE GRID CORP OF CHINA
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