CN206945947U - A kind of testing device of digital electric energy meter for sampling Detection - Google Patents

Abstract

It the utility model is related to a kind of testing device of digital electric energy meter for sampling Detection, including host computer, standard digital power source, communication module and Error Calculator, the standard digital power source respectively with host computer, communication module connects with Error Calculator, the communication module and Error Calculator are connected with digitalized electrical energy meter, the communication module includes main exchange, packet switch and wireless communication interface, the main exchange is connected with standard digital power source and packet switch respectively, the wireless communication interface is arranged on packet switch, it is connected with digitalized electrical energy meter.Compared with prior art, the utility model has the advantages that using flexible, is easy to control and save cost.

Description

A digital watt-hour meter detection device for sampling detection

technical field

The utility model relates to the field of power systems, in particular to a digital electric energy meter detection device for sampling detection.

Background technique

The application of electronic transformers in smart substations has changed the structure of traditional electric energy metering devices. Smart substation electric energy metering devices are composed of electronic transformers, merging units and digital electric energy meters. The metering system shares electronic transformers with protection and measurement and control systems. The digital information of electrical measurement after discrete digitization simplifies the secondary system of the substation. At the same time, measurement is both scientific and legal. It is an activity to achieve unit unity and accurate and reliable values. Research on the causes of errors in electronic transformers and digital energy meters, which are components of digital energy metering devices, and research on digital energy meter detection schemes and The detection device scheme is of great significance to ensure the accuracy and reliability of the digital electric energy metering system.

Since the digital energy meters are produced in batches, most of the detection of the digital energy meters is a sampling test. During the sampling test, all the digital energy meters are connected through a switch, and then randomly selected for testing. Because each batch There are a large number of digital energy meters in the country, and connecting through a switch not only reduces the communication speed, but also the wiring is confusing, which is not easy for the staff to manage and organize.

Utility model content

The purpose of this utility model is to provide a digital electric energy meter detection device for sampling detection in view of the above problems.

The purpose of this utility model can be achieved through the following technical solutions:

A digital watt-hour meter detection device for sampling detection, including a host computer, a standard digital power source, a communication module and an error calculator, the standard digital power source is respectively connected to the host computer, the communication module and the error calculator, the Both the communication module and the error calculator are connected to the digital electric energy meter, and the communication module includes a switchboard, a packet switch and a wireless communication interface, and the switchboard is respectively connected to a standard digital power source and a packet switch, and the wireless communication interface is set at On the packet switch, it is connected with the digital electric energy meter.

The communication interface module is also provided with a relay array for gating the packet switch, and the relay array is respectively connected with the upper computer, the switching switchboard and the packet switch.

The number of relays in the relay array is the same as the number of packet switches.

The wireless communication interface includes a Zigbee network interface.

The device is also provided with a clamping platform for fixing the digital electric energy meter, and the clamping platform is connected with the digital electric energy meter.

The snap-in station includes a snap-in main board and a snap-in group, the snap-in group is arranged on the snap-in main board, and the number of the snap-in groups is the same as the number of packet switches.

The clamping group is provided with a clamping grid, and the size of the clamping grid matches the size of the digital electric energy meter.

Compared with the prior art, the utility model has the following beneficial effects:

(1) By setting the exchange switchboard, group switch and wireless communication interface, the group detection of the digital electric energy meter is realized. By setting up multiple group switches under the switchboard, the pressure on the switchboard is greatly reduced, and each group switch communicates through wireless The interface is connected with the digital electric energy meter under this group, which greatly reduces the number of wiring, which is not easy to cause wiring confusion, and is convenient for staff management.

(2) The communication interface module is also equipped with a relay array for gating the packet switch. When performing sampling inspection, the host computer randomly selects the group of digital electric energy meters to be detected, and then uses the relay array for gating. This method realizes Sampling detection by group is easy to implement and easy to control, and the communication detection is performed on one group at a time, which is not easy to reduce the communication speed.

(3) The wireless communication interface is a Zigbee network interface, so that the digital energy meters of each group communicate through the Zigbee network. The Zigbee sensor network has low cost and low power consumption, which reduces the cost of the overall detection device.

(4) The detection device of the digital electric energy meter is also equipped with a clamping platform for fixing the digital electric energy meter, which reduces the detection error caused by the unstable connection of the digital electric energy meter during the detection process.

(5) The card connection station is equipped with the same number of card connection groups as the packet switch, and the digital electric energy meters are classified into groups, which is convenient for management and statistics.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Among them, 1 is the upper computer, 2 is the standard digital power source, 3 is the error calculator, 4 is the switchboard, 5 is the relay array, 6 is the group switch, 7 is the digital electric energy meter.

detailed description

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the utility model, and the detailed implementation and specific operation process are given, but the protection scope of the utility model is not limited to the following examples.

As shown in Figure 1, this embodiment provides a digital electric energy meter detection device for sampling detection, including a host computer 1, a standard digital power source 2, a communication module and an error calculator 3, the standard digital power source 2 and The upper computer 1, the communication module and the error calculator 3 are connected, and the communication module and the error calculator 3 are connected with the digital electric energy meter 7. The communication module includes a switchboard 4, a packet switchboard 6 and a wireless communication interface. The power source 2 is connected to the packet switch 6 , and the wireless communication interface is set on the packet switch 6 and connected to the digital electric energy meter 7 .

Wherein, the communication interface module is also provided with a relay array 5 for gating the packet switch 6 , and the relay array 5 is connected with the upper computer 1 , the switchboard 4 and the packet switch 6 respectively. The number of relays in the relay array 5 is the same as that of the packet switch 6 . The wireless communication interface includes a Zigbee network interface. The device is also provided with a clamping station for fixing the digital electric energy meter 7, and the clamping station is connected with the digital electric energy meter 7. The card connection station includes a card connection main board and a card connection group, and the card connection group is arranged on the card connection main board, and the number of the card connection groups is the same as the number of the packet switches 6 . The clamping group is provided with a clamping grid, and the size of the clamping grid matches the size of the digital electric energy meter 7 .

When the detection device is working, the upper computer 1 controls the standard digital power source 2 to generate a data frame conforming to the IEC61850-9-1/2 protocol, which is transmitted to the switchboard 4, and the upper computer 1 performs random sampling at the same time, and transmits the sampling results To the relay array 5, select the corresponding group switch 6, and use the Zigbee network to transmit the data to the digital electric energy meter 7 under the group through the packet switch 6, and the digital electric energy meter 7 calculates the electric energy according to the received data and outputs the corresponding The low frequency pulse to the error calculator 3. At the same time, the standard digital power source 2 outputs standard high-frequency pulses to the error calculator 3 . The error calculator 3 obtains the error according to the standard high-frequency pulse and the low-frequency pulse output by the electric energy meter.

Through the standard digital power source 2, various digital quantities with influential quantities are generated to represent voltage and current to simulate various abnormal situations. At the same time, the device is also equipped with a meter reading interface, which can cooperate with the meter reading interface to complete the multifunctional test of the electric meter. The detection device can Complete the following functions: fully automatic detection of creep, start, basic error, standard deviation, 24h variation and other items; can carry out voltage influence, frequency influence, harmonic influence, reverse phase sequence influence, voltage unbalance influence, sampling frequency Influence tests such as impact, sampling value data loss, etc.; multi-function tests, including time period switching, second pulse test, demand cycle error and other tests; event record detection: to detect whether the digital energy meter under test can record the following events, event The record includes the start and end time, the power at the start and end time, and the events include: the sampling data input sequence is discontinuous; the sampling data input message has an invalid channel event; the sampling data input message source address is invalid; the sampling data input message data Invalid event; the event that the sampling data input message is in the maintenance state; the sampling data input channel is abnormal.

Claims (7)

1. a kind of testing device of digital electric energy meter for sampling Detection, including host computer, standard digital power source, communication mould Block and Error Calculator, the standard digital power source are connected with host computer, communication module and Error Calculator respectively, described logical Letter module and Error Calculator are connected with digitalized electrical energy meter, it is characterised in that the communication module includes main exchange, divided Group interchanger and wireless communication interface, the main exchange is connected with standard digital power source and packet switch respectively, described Wireless communication interface is arranged on packet switch, is connected with digitalized electrical energy meter.

2. the testing device of digital electric energy meter according to claim 1 for sampling Detection, it is characterised in that described logical Letter interface module is additionally provided with relay array for gating packet switch, the relay array respectively with host computer, hand over Exchange is changed to connect with packet switch.

3. the testing device of digital electric energy meter according to claim 2 for sampling Detection, it is characterised in that it is described after Relay quantity in electrical equipment array is identical with the quantity of packet switch.

4. the testing device of digital electric energy meter according to claim 1 for sampling Detection, it is characterised in that the nothing Line communication interface includes Zigbee network interface.

5. the testing device of digital electric energy meter according to claim 1 for sampling Detection, it is characterised in that the dress The clamping platform being additionally provided with for stationary digital electric energy meter is put, the clamping platform is connected with digitalized electrical energy meter.

6. the testing device of digital electric energy meter according to claim 5 for sampling Detection, it is characterised in that the card Connecing platform includes the total plate of clamping and clamping group, and the clamping group is arranged on the total plate of clamping, and quantity and the packet of the clamping group are handed over The quantity changed planes is identical.

7. the testing device of digital electric energy meter according to claim 6 for sampling Detection, it is characterised in that the card Connect group and be provided with clamping lattice, the size of the clamping lattice and the size of digitalized electrical energy meter match.