RU143177U1 - ELECTRONIC METER FOR METERING OF ELECTRIC ENERGY ON ELECTRIC MOBILE COMPOSITION - Google Patents

Abstract

An electronic meter for accounting electric energy on electrically rolling stock, consisting of a primary information processing module, to the input of which a signal is proportional to the measured voltage and a signal proportional to the measured current, the secondary information processing module and the interface connected to it, the radio communication module, the cellular communication module and GPS / GLONASS modules, each of which is connected to a corresponding antenna, differing so that, in order to increase reliability, the power of the primary information processing module is carried out from a power source connected to an input to which a signal is proportional to the measured voltage and receiving electric energy from this signal, and the communication line between the primary and secondary information processing modules is made in the form of two pairs of LED-photodiode.

Description

The utility model relates to measuring equipment, in particular to devices for measuring the flow of electricity of direct and alternating current of electrified railway transport, namely, an electric locomotive.

A known electric energy counter [1], made in the form of an external power sensor and a base unit connected by a communication channel, the external power sensor comprising a load voltage sensor and a current sensor connected between the phase and neutral wires, the outputs of which are connected to the inputs of the multiplier, the output associated with an additional block of mathematical processing of the signal, the output of which is connected to the first transceiver associated with one end of the communication channel, and the base unit contains a second transceiver, connected on the one hand with the other end of the communication channel, and on the other hand, with the main unit for mathematical processing of the signal, one output connected to the display unit of the measurement results, and the other output to the block of remote data transmission, while in the external power sensor a measuring current transformer is introduced, forming a single structural module with it, and the primary winding of the current measuring transformer is connected in series with the load, and the secondary winding is connected to the inputs of the current sensor.

The disadvantages of the device include the impossibility of taking into account direct and alternating current by one type of meter, the lack of the ability to remotely transmit data, the difficulty of organizing the power supply of an external power sensor circuit.

Also known is a direct current counter type SKVT-F610 manufactured by OAO LEMZ [2]. To measure current, the DC meter is connected directly to the measuring shunt, and the voltage is measured using a voltage divider. Galvanic isolation is achieved through the use of optocouplers and has a galvanic strength of at least 7 kV. These DC meters have insufficient insulation for direct connection to a high-voltage feeder - less than 15 kV

Closest to the proposed device is a universal electronic meter for metering electrical energy on electric rolling stock of direct and alternating current [3], consisting of modules for primary and secondary information processing, and the interface connected to it, a fiber optic communication line, an insulating power source , modules of radio communication, cellular communication and GPS / GLOHACC.

The disadvantages of the device include low reliability, determined by the possibility of electrical breakdown of the power supply at a high voltage level between the primary and secondary information processing modules and the effect of vibration on the fiber-optic communication line between the primary and secondary information processing modules.

The purpose of the utility model is to increase reliability due to the fact that the power source receives electric energy from directly from the input voltage signal, and the communication line between the primary and secondary information processing modules is made in the form of two pairs of LED-photodiode.

This goal is achieved by the fact that in the electronic meter for accounting electric energy in an electrically rolling stock, consisting of a primary information processing module, to the input of which a signal is proportional to the measured voltage and a signal proportional to the measured current, the secondary information processing module and connected to it an interface, a radio communication module, a cellular communication module and a GPS / GLOHACC module, each of which is connected to a corresponding antenna,

the primary information processing module is powered by a power source connected to the input to which a signal is proportional to the measured voltage and the electric energy received from this signal, and the communication line between the primary and secondary information processing modules is made in the form of two pairs LED photodiode.

The counter contains a module for primary and secondary processing of information, each of which contains a microprocessor, and the communication line between the modules of primary and secondary processing of information is made in the form of two pairs of LED-photodiode. Data entry is carried out in the primary information processing module using multichannel ADC. The primary information processing module converts signals proportional to voltage and current into digital signals, and also calculates the instantaneous power value for each digital readout, taking into account the operating mode of electric rolling stock (traction or recovery). On the optical communication line, consisting of a pair of LED-photodiode, the processed data is fed to the secondary information processing module, built on the basis of a general-purpose processor, which calculates the amount of consumed and supplied electricity, assigns time and coordinates to each sample, voltage, power location of the electric rolling stock, builds graphs of the load in time and location of the electric rolling stock, displays the listed data, archives, stores and before I am downloading data to stationary data collection and preparation devices or rolling stock data collection devices. To connect the meter with stationary data acquisition and processing systems, a radio communication module and a cellular communication module are used, which allow you to communicate with stationary transceivers located along the railway and transmit information from the meter to the data transmission system. To determine the location of the vehicle, to determine the exact time, a GPS / TJIOHACC signal receiver is included in the meter. Availability of location information

When transporting a vehicle, it allows electricity metering taking into account temporary tariffs. Existence of the interface allows to exchange data with the electric rolling stock data acquisition system.

In FIG. 1 presents a structural diagram of the proposed device.

The electric energy meter consists of galvanically isolated modules of primary and secondary information processing MPOI and MVOI. A current sensor and a voltage divider are connected to the inputs ВхI and BxU, which can be made in the form of a shunt or current transformer, in the form of a voltage transformer or a resistive voltage divider. The primary information processing module can be located in the high-voltage zone directly next to the shunt or voltage divider, having galvanic connection with them. The primary information processing module is powered by a power source connected to an input to which a signal is proportional to the measured voltage and the electric energy received from this signal. For galvanic isolation, data is transferred between the primary and secondary information processing modules via an optical communication line, consisting of two pairs of LED-photodiode SD1-FD1 and SD2-FD2. The interface And allows you to exchange data with a data collection system of electric rolling stock. The electricity meter contains a VHF radio communication module, a GPRS cellular communication module, a GPS / GLOHACC module, each of which is connected to the corresponding antenna ANT1, ANT2, ANTZ and the secondary information processing module.

The counter works as follows.

Through the channel for measuring current BXI, the meter is connected to a measuring current transformer in case of working with alternating current, or to a current shunt in case of working with direct current, which can be installed both in the ground circuit and under high voltage potential. Through the voltage channel BxU, the counter is connected to a voltage divider when working with DC and AC voltage. Analog signals from sensors

Both the current and the voltage divider are fed to the input of the MPOI primary information processing module, where they are amplified, converted to digital form, and pre-processed.

Then, the processed data is transmitted via an optical communication line, realized using a pair of LED-photodiode SD1-PD1, to the secondary information processing module MVOI, which calculates the amount of consumed and delivered electricity, assigns time and voltage to each sample coordinates of the location of the electric rolling stock, builds graphs of the load in time and location of the electric rolling stock, displays the listed data, archives, stores, and also transfers upon request to stationary devices for collecting and preparing data using the VHF radio communication module and ANT1 antenna, GPRS cellular communication module and ANT2 antenna, or rolling stock data collection devices via interface I. Registration of meter readings depending on the tariff zone is carried out using the module GPS / GLOHACC and ANTZ antennas. Registration taking into account time tariffs is carried out using the built-in real-time clock synchronized by GPS or GLONASS. The power supply unit IP provides power to the primary information processing module, receiving electrical energy from the input signal. The optical communication line formed by a pair of LED-photodiode SD2-FD2 is designed to transmit control commands from the secondary information processing module to the primary information processing module.

The use of the proposed meter will increase the reliability, as well as the reliability of accounting of electric energy for train traction, eliminate the need for separate counters of constant and alternating currents, ensure the recording of schedules, current, voltage, consumption and recovery of active, reactive and full power , a few meters of the quality of electrical energy.

Bibliographic list

1. Electric energy meter. Utility Model Certificate of the Russian Federation No. 85669.

2. DC counter type SKVT-F610. (http://www.lemz.su/index.php/ru/2009-03-23-06-55-55/--610.html).

3. A universal electronic meter for metering electrical energy on electric rolling stock of direct and alternating current. Patent for utility model of the Russian Federation No. 97829.

Claims (1)

An electronic meter for accounting electric energy on electrically rolling stock, consisting of a primary information processing module, to the input of which a signal is proportional to the measured voltage and a signal proportional to the measured current, the secondary information processing module and the interface connected to it, the radio communication module, the cellular communication module and module GPS / GLONASS, each connected to a respective antenna, characterized in that, in order to improve reliability, the primary information processing unit power and it is carried out from a power source connected to an input to which a signal is proportional to the measured voltage and receiving electric energy from this signal, and the communication line between the primary and secondary information processing modules is made in the form of two pairs of LED-photodiode.