RU97829U1 - UNIVERSAL ELECTRONIC METER FOR ACCOUNTING ELECTRIC ENERGY ON ELECTRIC MOBILE COMPOSITION OF DC AND AC - Google Patents

Abstract

 A universal electronic meter for metering electric energy on electric rolling stock of direct and alternating current, 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, fiber optic a communication line, an insulating power source, characterized in that the primary information processing module can be galvanically connected to a high-voltage With a traction network, information between the primary signal processing module and the secondary information processing module is transmitted via a fiber optic communication line, the primary information processing module is fed through an isolating power supply, and a radio communication module, a cellular communication module and a GPS / GLONASS module are also introduced, each of which is connected to the corresponding antenna and the secondary information processing module.

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.

Known three-phase multifunctional electric meter series CE301 [1], which measures and records active electric energy in three-phase four-wire AC circuits with the possibility of metering in one or two directions. Integration into the control system of remote data collection is carried out via a digital interface implemented using various built-in or external communication modules, including using a GSM or radio modem.

The disadvantage of this counter is the inability to account for direct and alternating current by one type of meter and the inability to use it on a vehicle.

Also known is an electric energy meter [2], made in the form of an external power sensor and a base unit connected by a communication channel, and the external power sensor contains a load voltage sensor and a current sensor connected between the phase and zero wires, the outputs of which are connected to the inputs of the multiplier, the output of the connected 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, the other output to the remote data transmission unit, while an external current sensor has a current transformer forming a single structural module with it, and the primary winding of the measuring current transformer is connected in series with the load in the phase wire, and the secondary winding is connected to the inputs of the current sensor.

The disadvantages of the device include the impossibility of accounting for direct and alternating current by one type of meter, the inability 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" [3]. To measure current, a direct current 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

There is also a method of accounting for the consumption of electric energy on a rolling stock of electric transport and an electronic meter for its implementation [4]. An electronic meter simultaneously with data on energy consumption records data on the vehicle’s travel time and distance traveled, which are compared with standard values in a depot or registration point.

The disadvantage of this device is the error in determining the distance traveled, since the speed sensor is connected to the drive axle of the vehicle and does not take into account the possibility of wheel slippage, the inability to remotely transmit data, and the meter is galvanically connected to the high-voltage traction network.

Closest to the proposed device is a meter of AC electric power consumption on an electric locomotive [5], which contains an AC electric energy meter having a current input, voltage input and output; a current sensor and a high voltage traction transformer, including a primary (mains) winding and a secondary winding, while the primary winding is connected through a high-speed switch to the contact network and through a current sensor with a current input of the counter. The meter is equipped with a high-voltage voltage divider, including low and high voltage arms, made in the form of series-connected resistors connected at one end to the voltage input of the meter, and the other with a contact network and an interface converter connected to the meter output by a fiber optic cable.

The disadvantages of the device include the impossibility of accounting for direct and alternating current with one type of meter, the impossibility of registering electric energy taking into account tariff zones, the lack of interfaces for remote reading of readings.

The purpose of the utility model is to ensure the metering of electricity on a rolling stock of direct and alternating current using a universal electric energy meter, increased insulation strength for direct connection to a high-voltage feeder, the possibility of locating a locomotive using the GPS / GLONASS system, and the possibility of registering electricity taking into account tariff zones , the presence of interfaces for remote reading of meter readings.

This goal is achieved by the fact that in a universal electronic meter for accounting electric energy on electromotive composition of direct and alternating current, 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 optical fiber communication line, the isolating power supply, a characteristic feature is that the primary processing module and information can be electrically connected with a high voltage traction network, information between the primary signal processing unit and the secondary information processing unit is transmitted over a fiber optic link, power of the primary information processing unit through an insulating power source. In addition, a radio communication module, a cellular communication module, and a GPS / GLONASS module, each of which is connected to a corresponding antenna and a secondary information processing module, are also added to the counter.

The counter contains a module for primary and secondary information processing, each of which contains a microprocessor, and these modules are connected using a fiber optic cable. Data entry is carried out in the first module using a multi-channel ADC, which includes programmable amplifiers that make it easy to change the gain depending on the type of input analog data coming from various current and voltage sensors. The primary mathematical data processing is performed by a digital signal processing processor located in the primary information processing module, into which data is received in digital form from the output of the ADC. The processed data is transmitted via a fiber-optic cable to a second module, built on the basis of a general-purpose processor for further processing, archiving, recording, and also outputting data to a digital display and via communication interfaces. To connect the meter with stationary data collection 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, the receiver includes a GPS / GLONASS signal receiver. The availability of information on the location of the vehicle allows you to make electricity metering, taking into account temporary tariffs. The presence of the interface allows you to exchange data with the data collection system of electric rolling stock. The ability to account for electric power of direct and alternating current is achieved by executing the input circuits of the module according to a differential circuit, and the amplifiers have a programmable gain, so the signals of direct and alternating current and voltage supplied to the inputs of analog-to-digital converters have practically the same amplitudes, only the waveform is different. The electricity meter has two different algorithms, according to which the electricity of direct and alternating current is recorded.

Figure 1 presents the structural diagram of the proposed device.

A universal 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 B × I and B × U, 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. To carry out galvanic isolation with high insulation strength, data transfer between the primary and secondary information processing modules is carried out via fiber-optic communication link OVLS. The power of the primary information processing module is carried out using the isolating power supply of the IIP. The secondary information processing module has a built-in power supply that connects to the on-board network of electric rolling stock. 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 / GLONASS module, each of which is connected to a corresponding antenna ANT1, ANT2, ANT3 and a secondary information processing module.

The counter works as follows.

Through the channel measuring current B × I, 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 B × U, the counter is connected to a voltage divider when working with DC and AC voltage. The analog signals from the current sensor and voltage divider are fed to the input of the MPOI primary information processing module, where they are amplified, converted into digital form and undergo preliminary processing.

Then, the processed data is transmitted via the fiber-optic communication line of the fiber-optic communication line to the secondary information processing module of the MVOI. In this module, secondary processing of the received data is performed, i.e. registration, archiving, storage, as well as transmission, 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 Zones are made using the GPS / GLONASS module and the ANT3 antenna. Registration taking into account time tariffs is carried out using the built-in real-time clock synchronized by GPS or GLONASS. The isolation power supply of the IIP provides power to the primary information processing module to prevent damage to the entire device by high voltage when the meter is directly connected to the measuring current shunt.

The use of the proposed meter will improve the reliability of accounting for electric energy for traction of trains, eliminate the need for separate meters of constant and alternating currents, ensure the recording of schedules, current, voltage, consumption and recovery of active, reactive and apparent power, parameters of the quality of electric energy.

Bibliographic list

1. Three-phase multifunctional electric meter CE301 series. http://www.energomera.ru/products/meters/ce301r33.

2. Electric energy meter. Certificate for a utility model of the Russian Federation No. 85669.

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

4. A method of accounting for the consumption of electrical energy on rolling stock of electric vehicles and an electronic meter for its implementation. RF patent for the invention No. 2140654.

5. AC power meter on an electric locomotive. Certificate for utility model of the Russian Federation No. 69259.

Claims (1)

A universal electronic meter for metering electric energy on electric rolling stock of direct and alternating current, 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 fiber-optic interface connected to it a communication line, an insulating power source, characterized in that the primary information processing module can be galvanically connected to a high-voltage the traction network, the information between the primary signal processing module and the secondary information processing module is transmitted via a fiber optic communication line, the primary information processing module is fed through an isolating power source, and a radio communication module, a cellular communication module and a GPS / GLONASS module are also introduced, each of which is connected to the corresponding antenna and the secondary information processing module.