RU44896U1 - AUTOMATED SYSTEM OF METERING AND CONTROL OF ELECTRIC POWER CONSUMPTION - Google Patents

Abstract

The utility model relates to automatic metering and control of electricity consumption by industrial enterprises and can be used for commercial payments for the use of electric energy and its consumption modes. The essence of the utility model is that two-interface power meters are installed in the automated system, information from which is transmitted through a single interface to the marketing company through a signal level converter-switch, to which modems are connected, which communicate via the city telephone exchange and cellular as a backup channel, and the second counter interface provides the transfer of operational data to a computer (AWP server) through a signal level converter. AWP, in turn, provides time synchronization in the counters through a satellite GPS receiver. Using the utility model can significantly simplify the automated system of accounting and control of electricity consumption by enterprises by eliminating the costly devices for collecting and transmitting data, which led to a reduction in the cost of its manufacture and operation, as well as to increase the information capacity and flexibility of the system by obtaining all the necessary information directly from counter.

Description

The utility model relates to automatic metering and control of electricity consumption by industrial enterprises and can be used for commercial payments for the use of electric energy and its consumption modes.

A device is known for automatic metering and control of electricity consumption in enterprises, which consists of an electric energy meter, pulse shaper, daily energy pulse counter, digital-to-analog converter, monthly consumption meters, a unit for setting consumption limits, an indication and alarm unit, a synchronous reversible counter and an emergency unit nutrition. (USSR Author's Certificate No. 1626158, GOIR 11/56, published 02/07/91, Bull No. 5)

The disadvantage of this device is that its information capacity is very small. In addition, the design of the device is based on pulse meters, which does not meet modern requirements and the regulation on the organization of commercial metering of electricity and power in the wholesale market, which determines that a digital electric meter should be used in such systems.

A well-known automated system for the commercial accounting of electricity, including electricity meters with digital interfaces RS-485 of the type ЦЭ 6822, each connected by its output via a communication channel with intermediate devices in the form of data collection and transmission devices, the output of which is connected to a modem for transmitting information to a sales company, to the workstation -server, to the astronomical time receiver and a backup cellular communication channel with a sales organization, (see ASKUE prospectus, an automated system for commercial accounting of electricity. with technical equipment of concern "Energomera" Penza 2000 Appendix 1). The complex of technical means is designed to automate the control of power consumption and power at energy facilities (power plants and substations) and industrial enterprises.

The main disadvantage of this system is the complexity of its maintenance and its relative high cost.

The closest in technical essence, the problem to be solved and the achieved result to the claimed system is an automated energy metering system containing single-interface digital meters, each connected to its output by a communication channel through

an interface with an intermediate device in the form of an Ekom-3000 controller, which is connected via an interface to an AWP server. The system is equipped with modems for organizing communication through the city telephone exchange with a sales organization. The backup channel is designed for the same purpose, but using cellular communications.

The system also has a time synchronization unit (see the prospectus of the Prosoft-E research and production company, “Automated Energy Management and Accounting System,” Ekaterinburg, 2000, Appendix No. 2). The system under consideration collects data from lower-level equipment, analyzes the received information for reliability, monitors the serviceability of the channels and converts the received signals into physical quantities (instantaneous energy consumption indicators, object state parameters), organizing an archive and monitoring the set parameter values.

The specified technical solution was adopted as a prototype.

However, in this system, the same disadvantages are characteristic as the above analogue. Firstly, the system is complex both in terms of its elemental composition and overall structural and structural structure, which also determines the complexity of its maintenance, since it requires highly qualified specialists to ensure its performance.

Secondly, the system is expensive, so it contains a high-value controller "Ekom-300".

It became possible to solve the problem of eliminating the disadvantages of the prototype by creating a new system layout.

The technical result of simplifying the system is achieved due to the fact that digital dual-interface power meters are installed in the system, each of which is connected to the modems by a second output through an interface and a switch for communication with a sales company through a city telephone exchange with one modem, and a second modem provides a backup communication channel , - for example, using cellular communication.

The first output counters are connected directly to the computer (AWP database server) for operational control of energy consumption and power quality control.

If necessary, a printer is connected to the AWP server for printing data on paper. The difference of the automated system is also that the switch-converter is additionally designed for switching channels, i.e. from the main channel of communication with the sales company to the reserve one and vice versa. To convert signal levels in the system, RS-232 and RS-485 interfaces are used.

In general, the automated system is equipped with well-known equipment.

The drawing shows a diagram of an automated system for accounting and control of electricity consumption.

The automated system includes digital two-interface electricity meters 1, each connected by communication channels 2 through an RS-485 interface with a signal level converter 3, which in turn is connected to a computer (AWP server) 4, and to which a time synchronization unit 5 is connected. If necessary, a printer 6 can be connected to a computer (AWP server) to print data from counters 1 on a paper medium. This communication channel is designed to provide operational information on electricity consumption and energy quality of enterprises consuming electricity.

At the same time, each counter 1 through the RS-485 interface with its second output 7 is connected to a switch-converter 8, which is connected via an RS-232 interface to a modem 9 with one output for communication through a public telephone exchange with a sales company.

The second output of the switch-converter 8 is connected via an RS-232 interface to the input of an additional modem 10, which through the antenna 11 organizes a backup cellular communication channel with a sales company.

The SET-4. TM.03 digital two-interface meters send identical data on the parameters of the consumed energy upon request to their two outputs simultaneously. The counters accumulate accounting information and transmit it through the RS-485 interface in a digital code to the modem. In the opposite direction, the counter receives time correction information from the time synchronization unit 5. The RS-485 interface allows you to connect meters to a modem or to a computer and combine up to 32 meters into one common bus.

Modem, a signal conversion device designed to provide serial data transmission from meters through communication channels.

Computer (AWP database server) - an automated workstation that includes a standard computer as a server for a database drive from a counter. The computer provides information from meters about power consumption, as well as information about the exact time from the antenna of a single GPS time (not shown in Fig.) Through a time synchronization unit and corrects the time in each counter.

The converter converts the signal levels of the RS-485 to RS-232, and the switch-converter not only converts the signal levels

RS-485 interface to RS-232, but also switches the communication channel through the GTS with the sales company to the backup cellular communication channel and vice versa.

Automated system operates as follows.

Information on the parameters of the energy consumed from the meters 1 through channel 2 is transmitted through the RS-485 interface to the converter 3, in which it is converted to the signal level of the RS-232 interface, after which the information is processed in a computer and accumulated in the database server 4. If necessary, the information can be displayed on the printer 6 for the enterprise user of electricity. The time correction of the counters 1 is carried out through block 5 - computer 4 RS-232 interface - converter 3 - RS-485 interface - output 2.

At the request of the sales company, through the city telephone exchange and modem 9, the converter-switch 8 turns on the communication channel and the information goes to the addressable counter 1, from which the requested information is returned, that is, it goes through their second interface outputs 7, and then through the RS-485 interface and from the RS-232 interface it gets to modem 9, which also includes a communication channel through the city telephone exchange. In the communication line with the sales company there is a backup channel, through which the sales organization through the antenna 11, modem 10 and the converter-switch 8 can receive data on the energy consumption of the enterprise. Since the switch-converter is based on the principle of multiplexing, the choice of the data transmission channel is formed by the primary nature of the request and the formation of blocking of the second channel for the duration of the exchange on the occupied channel.

The proposed automated system provides the energy sales company with information about the energy consumption of enterprises, and enterprises about the current energy consumption and instantaneous energy consumption parameters, although it does not use intermediate data collection devices (controllers), which makes it much cheaper than known systems.

Claims (4)

1. An automated system for accounting and control of electricity consumption, including digital meters, each connected by its output to a communication channel via an interface with an intermediate device connected to a computer (database workstation server), to which a time synchronization unit, a modem for communication through a telephone exchange with distribution company and an additional backup channel, characterized in that the system has digital dual-interface power meters, each of which is connected to the second output via the connection interface n with the input of the intermediate device, made in the form of a switch-converter of the signal level, which is also connected via the interface with one output to the modem for communication via the GTS, and the second is connected to the additional modem, forming a backup channel for communication with the sales organization. 2. The automated system according to claim 1, characterized in that a printer is connected to the AWP database server for printing data for the enterprise on paper. 3. The automated system according to claim 1, characterized in that the intermediate device connected to the computer (AWS database server) is made in the form of a signal level converter from the RS-485 interface to the RS-232 interface. 4. The automated system according to claim 1, characterized in that the switch-converter is additionally designed to switch channels, namely, from a communication channel with a sales company to a reserve one and vice versa.