High voltage electric energy meter remote on-line verification system

Abstract

The invention discloses a high voltage electric energy meter remote on-line verification system which comprises on-site comprehensive detection and collection devices, a communication network, a data network and a laboratory main station, wherein the on-site comprehensive detection and collection devices are mounted in metering cabinets of all factory stations, the laboratory main station is used for collecting data of the on-site comprehensive detection and collection devices via the communication network, the data and information are stored in a database of a server in a concentrated manner, real time accuracy information of a specific electric energy meter can be obtained via calculation and analysis, and remote electric energy meters can be subjected to online verification and reliable real-time state evaluation operation by the laboratory main station via a networked PC and a networked webpage browser. In the high voltage electric energy meter remote on-line verification system, the data and the information can be managed in a unified manner by the laboratory main station; the high voltage electric energy meter remote on-line verification system is characterized by low system cost, convenient-to-install property, accuracy and reliability, strong timeliness, simple maintenance and the like.

Description

technical field [0001] The invention relates to a remote online calibration system for high-voltage electric energy meters, especially without any modification to the original circuit of the metering device, and the standard electric energy meter (high-precision digital electric energy meter calibrator) is placed in the environment of the main station of the laboratory Under the remote online verification method. Background technique [0002] According to the requirements of the industry standard DL / T448-2000 "Technical Management Specifications for Electric Energy Metering", the energy meters for trade settlement installed at important gateway metering points such as power generation on-grid, cross-regional power transmission, cross-provincial power transmission, and large users shall be installed on-site at least every 3 months. 1 inspection, and most power plants and substations are located in remote areas far away from urban areas, with inconvenient transportation, long ...

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Problems solved by technology

[0002] According to the requirements of the industry standard DL / T448-2000 "Technical Management Specifications for Electric Energy Metering", the energy meters for trade settlement installed at important gateway metering points such as power generation on-grid, cross-regional power transmission, cross-provincial power transmission, and large users shall be installed on-site at least every 3 months. 1 inspection, and most power plants and substations are located in remote areas far away from urban areas, with inconvenient transportation, long distances, and wide distribution. In addition, the traditional on-site calibration of electric energy meters needs to be operated under electrified conditions. On-site calibration It is necessary to connect the current circuit of the tested meter in series with the standard meter, and connect the voltage circuit in parallel with the standard meter. This will inevitably loosen and tighten the terminals on the metering screen many times, often resulting in loosening or slipping of the terminals. These factors have brought practical difficulties such as high time cost, high labor cost, and low work efficiency to the calibration work of electric energy meters, and the on-site work has certain safety risks. If it is not careful, it may bring greater safety hazards to the power system.

[0003] At present, most of the existing on-line calibration systems for energy meters usually install standard energy meters or calibration devices together with on-site collection equipment in power plants or substations. On-site installation needs to change the original circuit of the metering device, which has certain potential safety hazards. Moreover, a large number of factories and stations need to install a large number of calibration devices, which have the characteristics of low equipment utilization, high economic costs, and high labor costs. Moreover, the operation and maintenance of metering devices brings certain difficulties to the power metering department. Therefore, a new type of calibration device is required. , The construction is convenient for the remote online verification structure model of the high-voltage electric energy meter. Carry out remote online calibration for table accuracy

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