Distribution power automation terminal with equipment state monitoring function and monitoring method

Abstract

The invention discloses a distribution power automation terminal with an equipment state monitoring function and a monitoring method. A measurement and control module is respectively connected with an analog quantity acquiring module, a switch quantity acquiring module, a switch control loop and a switch energy storage loop, and controls the switch control loop and the switch energy storage loop according to received analog quantity and switch quantity; and an equipment state diagnosis module is respectively connected with a switching characteristic monitoring module, a power state monitoring module, an insulating characteristic monitoring module, an equipment vibration and sound monitoring module, an equipment temperature monitoring module and an environment temperature and humidity monitoring module, and diagnoses and assesses states of equipment according to monitored variable quantity. On-line assessment, fault analysis, diagnosis and advance warning on health conditions of running of main equipment of a power distribution network are implemented, and an embodiment which is feasible in technology and low in cost is provided for condition-based maintenance of the main equipment of the power distribution network.

Description

technical field [0001] The invention relates to the field of power system automation, in particular to a power distribution automation terminal with equipment status monitoring function and a monitoring method. Background technique [0002] The distribution network is a power network that receives power from the transmission network or regional power plants and distributes it to various users locally or step by step through power distribution facilities. It is an important link to control and ensure the reliability and quality of power supply for users. Compared with power transmission and transformation, my country's distribution network is still relatively backward, and it is the weakest link in the power grid. The distribution network is composed of distribution lines and distribution network equipment. The main equipment of the distribution network mainly includes switch cabinets, ring network cabinets, column switches and distribution transformers. These devices are lar...

AI Technical Summary

Problems solved by technology

Existing distribution automation terminals only have the control function of voltage, current, switch position collection and switch opening and closing status of primary distribution equipment, and cannot monitor the operating status of the equipment itself, such as equipment insulation characteristics, equipment heating conditions, equipment vibration and noise , the state of the switch operating mechanism and the environmental information of the equipment operation, etc.

[0005] Chinese patent 201420132112.8 proposes an on-line monitoring device for the status of key equipment in the shutdown station, which can monitor the temperature of the switchgear cabinet, the temperature of the cable and the cable distribution box, and the circulating current of the cable metal sheath. The solution uses a separate intelligent power distribution terminal The information relay device or switch information relay device collects the monitoring information of each sensor, and does not integrate the equipment status monitoring function into the distribution automation terminal

Chinese patent 201420171977.2 proposes an online monitoring system for the status of key power distribution equipment of the ring network cabinet, through which the intelligent power distribution terminal is connected to the overall environment monitoring device of the ring network cabinet, the status monitoring device of the switchgear, and the status monitoring device of cables and cable distribution boxes to realize For the online monitoring of the status of the ring main unit, this solution also does not integrate the equipment status monitoring function with the power distribution automation terminal. The power distribution terminal only provides the communication relay function, and an independent switch cabinet status monitoring device needs to be configured.

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