CN204228947U - A kind of single-phase real load electric energy table calibration equipment - Google Patents

Abstract

The utility model discloses a single-phase real-load electric energy meter inspection device, which includes an error measurement and error display module, a collector, a standard meter, a multi-way switcher, a shunt, a time-base frequency meter, a communication system and a computer. The computer is connected with the communication system, the input end of the error measurement and error display module is connected with the multiplexer and the electric energy meter, the output end is connected with one end of the communication system, and the time base frequency instrument is connected with the The communication system is connected, the collector is connected between the communication system and the electric energy meter, the standard meter is connected between the electric energy meter and the multiplexer, and the shunt is connected to the Between the multi-channel switcher and the electric energy meter; the technical solution provided by the utility model realizes the verification of the electric energy meter under the real load state, and the verification result is reliable, which can be used to simulate the on-site operation of the electric energy meter under laboratory conditions status.

Description

A single-phase real-load electric energy meter calibration device

technical field

The utility model relates to a checking device for an electric energy meter, in particular to a checking device for a single-phase real load electric energy meter.

Background technique

Since 2010, with the construction of electricity consumption information collection system and the large-scale promotion of smart energy meters, smart meters as smart terminals of smart grids are no longer energy meters in the traditional sense. In addition to functions, in order to adapt to the use of smart grid and new energy, it also has the functions of electricity consumption information storage, two-way multi-rate metering function, user-end control function, two-way data communication function of multiple data transmission modes, and anti-theft function. Smart meters represent the development direction of energy-saving smart grid end-user intelligent terminals in the future. With the increasing development of smart grids, the demand for intelligent user terminals in countries around the world is also increasing. However, during the promotion and application of smart energy meters, there have been many phenomena such as failure of energy meter components, flying away of electricity meters, incomplete software versions, and operating conditions affecting measurement errors, which have aroused social doubts about the quality of smart energy meters.

In order to effectively ensure the reliable quality, accurate measurement and stable operation of smart energy meters, and to implement more comprehensive management and control of smart energy meters, it is necessary to further strengthen the research on the design principles, field simulation tests, component detection and reliability evaluation technologies of smart energy meters. The cause of the problem, put forward the corresponding solution, and provide technical support for the bidding and popularization and application of smart electric energy collection meter.

The actual load verification effectively solves the defect that the electric energy meter cannot be verified online, and can reasonably solve the failure of the power system caused by the virtual load verification. Therefore, it is necessary to provide an electric energy meter device to realize the real load state of the electric energy meter. The verification conditions make the verification results more in line with the field operation conditions of the electric energy meter, and provide test data support and experimental result demonstration for the modification and improvement of the existing measurement standard system.

Contents of the invention

Aiming at the deficiencies of the prior art, the utility model provides a single-phase real-load electric energy meter inspection device, the inspection device includes an error measurement and error display module, a collector, a standard meter, a multi-channel switch, a shunt, a time base frequency instrument, communication system and computer; the computer is connected to the communication system, the error measurement and error display module is provided with a multiplexer and the electric energy meter, and the output terminal is connected to the communication system Input terminal; the time base frequency instrument is connected to the communication system, the collector is provided with an input terminal connected to the electric energy meter and an output terminal connected to the communication system, and the standard meter is connected to the Between the electric energy meter and the multiplexer, the shunt is connected between the multiplexer and the electric energy meter.

Preferably, the electric energy meter includes an inlet electric energy meter casing, a connecting terminal provided on the electric energy meter casing, and a terminal button box cover arranged outside the connecting terminal, and the terminal button box cover is connected with the electric energy meter casing lead to close the connection.

Preferably, the positions of the wire outlet holes on the terminal button box cover and the connection terminal holes on the connection terminal are staggered.

Preferably, there is a distance between the vertical surface of the wire outlet hole of the terminal button box cover and the vertical surface of the terminal hole of the connection terminal.

Preferably, a 485 bus connection is used between the collector and the electric energy meter.

Preferably, the electric energy meter includes a shorting piece, and the shorting piece is arranged between the connection terminal and the outgoing line terminal of the electric energy meter.

Preferably, the number of the electric energy meters is 1-64.

The beneficial effects of the utility model are:

The utility model provides a single-phase real-load electric energy meter inspection device, which first realizes the possibility of verifying the electric energy meter in the real-load state, and fills in the gap that the electric energy meter can only be verified by virtual load but not by real load. The test results are more reliable; secondly, the device traceability method is simple, the wall meter wiring is fast and convenient, the calibration scheme can be set flexibly, the report format can be customized, and it has multiple communication methods such as RS485, infrared, and carrier wave. The number of energy meters can range from 1 to 64 Optionally, the automatic control can be called as a part of the program, laying the foundation for simulating the field operation of the electric energy meter under laboratory conditions.

Description of drawings

The utility model is described in further detail below in conjunction with accompanying drawing and specific embodiment.

Fig. 1 is the structural diagram of the verification device of the real load electric energy meter of the present invention;

Fig. 2 is a structural schematic diagram of the electric energy meter applicable to the experimental new real load electric energy meter verification device.

Detailed ways

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in further detail.

In order to thoroughly understand the embodiments of the present invention, detailed structures will be presented in the following description. Obviously, the implementation of the embodiments of the present invention is not limited to specific details familiar to those skilled in the art. The preferred embodiments of the utility model are described in detail as follows, but in addition to these detailed descriptions, the utility model can also have other implementations.

Referring to Fig. 1, Fig. 1 is a structural diagram of the verification device of the real load electric energy meter of the present invention. In the figure, the single-phase real-load electric energy meter inspection device consists of 1 error measurement and error display module, 1 collector, 1 standard meter, 1 multi-channel switcher, multiple shunts, 1 time-base frequency meter, communication The system and a computer are composed. The table positions 1-n in Fig. 1 are used to place the measured electric energy meter; one error measurement and error display module, whose input end is connected with the multiplexer and electric energy meter, and the output end is connected with the communication One end of the system is connected to compare the measured difference between the measured electric energy meter and the standard meter, and display the obtained error value; one collector for collecting electric energy meter information will input the collected information into the communication system, and Concentrate on the error measurement and error display module to participate in the calculation of the energy meter error, and use the 485 bus to connect the collector and the energy meter; a standard meter is connected between the electric energy meter and the multi-way switcher, and the accuracy is higher than that of the electric energy meter. As a reference quantity; multiple shunts are connected between the multi-way switcher and the electric energy meter, and are used to shunt the current flowing through the electric energy meter to the multi-way switcher and send it to the standard meter; one time base frequency meter, and Communication system connection, used to generate standard time base frequency; 1 multi-channel switcher, used to switch the current value sent to the standard meter; 1 computer, connected to the communication system, used to set the calibration scheme and adjust the standard meter range online Wait for program-controlled operation.

Fig. 2 is a structural schematic diagram of the electric energy meter applicable to the experimental new real load electric energy meter verification device. In Fig. 2, the electric energy meter includes an electric energy meter casing 1, a connecting terminal 2 arranged on the electric energy meter casing 1, and a terminal button box cover 4 arranged outside the connecting terminal 2, and the terminal button box cover 4 is connected to the electric energy meter casing 1. The electric energy meter housing 1 is connected by lead seal, the position of the outlet hole 5 on the terminal button box cover 4 and the terminal hole 3 on the terminal 2 are staggered, and the vertical surface of the outlet hole 5 of the terminal button box cover 4 There is a distance between the vertical plane of the terminal hole 3 of the terminal 2, and a deviation of 10 millimeters has been designed in the outlet hole 5 on the end button box cover 4 and the terminal hole 3 among the figures. In the computer watch with such a structure, the position of the terminal hole and the outlet hole on the button box cover are staggered, which increases the difficulty of shorting, and can effectively prohibit any long-distance wiring operation from the outside to the inside, and can effectively prevent electricity theft.

In order to improve the flexibility of this device, a shorting piece can be installed on the electric energy meter. By connecting the shorting piece between the terminal 2 of the electric energy meter and the outlet terminal, the number of electric energy meters used can be adjusted. The number of electric energy meters in this device Up to 64 can be installed.

When the device is running, refer to Figure 1, the mains supply single-phase voltage to the electric energy meter and the standard meter, the voltage signal is loaded on the load after passing through the electric energy meter, the load sets the frequency value according to the required current value, and the applied voltage The load current is generated under the load current to form a power consumption circuit. The current value flowing through each meter is added to the standard meter through the shunt through the multi-channel switcher. The electric energy meter and the standard meter work for a period of time under the applied voltage and current. time, the measured pulse signal value is transmitted to the error measurement module, and the verification of the meter is completed by comparing the pulse signal output by the electric energy meter with the standard meter; the communication system of the device is used to complete the reading of the bottom information of the electric energy meter; The computer can set the verification scheme, and transmit it to the following execution module to run through the communication system; the communication system can also read the bottom information of each electric energy meter.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still implement the present invention Any modification or equivalent replacement that does not deviate from the spirit and scope of the present invention is within the protection scope of the pending claims.

Claims (7)

1. a single-phase real load electric energy table verifying attachment, is characterized in that, described verifying attachment comprises error measure and error display module, collector, standard scale, multi-channel switcher, shunt, timebase frequency instrument, communication system and computing machine; Described computing machine is connected with described communication system, described error measure and error display module be provided be connected with multi-channel switcher and described electric energy meter respectively, input end that output terminal is connected with described communication system; Described timebase frequency instrument is connected with described communication system, described collector is provided with the input end be connected with described electric energy meter and the output terminal be connected with described communication system, described standard scale is connected between described electric energy meter and described multi-channel switcher, and described shunt is connected between described multi-channel switcher and described electric energy meter.

2. single-phase real load electric energy table verifying attachment according to claim 1, it is characterized in that, described electric energy meter comprises electric energy meter casing (1), is located at the connection terminal (2) of (1) on electric energy meter casing and is located at connection terminal (2) terminal box cover (4) outward, and described terminal box cover (4) is connected with described electric energy meter casing (1) lead sealing.

3. single-phase real load electric energy table verifying attachment according to claim 2, it is characterized in that, the wire hole (5) on described terminal box cover (4) staggers with terminals sub-aperture (3) position on connection terminal (2).

4. single-phase real load electric energy table verifying attachment according to claim 3, it is characterized in that, between the vertical plane of the vertical plane of the wire hole (5) of described terminal box cover (4) and the terminals sub-aperture (3) of connection terminal (2), leave distance.

5. single-phase real load electric energy table verifying attachment according to claim 1, is characterized in that, adopts 485 buses to connect between described collector and described electric energy meter.

6. single-phase real load electric energy table verifying attachment according to claim 2, it is characterized in that, described electric energy meter comprises short circuit sheet, and described short circuit sheet is arranged between the connection terminal (2) of described electric energy meter and outlet terminal.

7. single-phase real load electric energy table verifying attachment according to claim 2, it is characterized in that, the quantity of described electric energy meter is 1-64.