CN205899894U - Use emulation intelligent ammeter's trouble analogue means - Google Patents

Abstract

The utility model provides a fault simulation device using a simulated intelligent electric energy meter, which belongs to the field of power systems. Including that the control host selects the target fault from the fault library, generates a fault command, sends the fault command to the grid operation fault simulator, combines the fault command with the grid, performs fault processing on the sample voltage signal and sample current signal, and generates fault voltage data and fault current Data, the fault voltage data and fault current data are transmitted to the simulated smart energy meter, and the simulated smart power meter generates a smart grid fault corresponding to the fault command according to the fault voltage data and fault current data. By using the grid operation fault simulator and the simulated smart energy meter to simulate according to the fault command, at the same time, the control host also checks the working status of the grid operation fault simulator and the simulated smart energy meter, so that the trainees can follow the correct fault simulation method Conduct training that increases the skill level of trainees.

Description

A fault simulation device using simulated smart energy meter

technical field

The utility model relates to the field of power systems, in particular to a fault simulation device using a simulated intelligent electric energy meter.

Background technique

With the rapid development of the national economy, in order to meet the growing demand for electric energy, the power system is also undergoing technological upgrading, and the construction of smart grids in the power system has become a trend of social progress.

In the process of building a smart grid, single-phase and three-phase smart energy meters have been widely used, but limited to the current technical level of electricians, the maintenance of the above-mentioned single-phase and three-phase smart energy meters is basically carried out by manufacturers.

In the process of realizing the utility model, the inventor of the utility model has found that the related technology has at least the following problems:

Since the consumption of single-phase and three-phase smart energy meters is increasing, if all of them are routinely maintained by manufacturers, it will seriously affect the promotion and utilization of single-phase and three-phase smart energy meters. However, the current power maintenance personnel cannot maintain the smart energy meter smoothly because they have not participated in the maintenance training for the smart energy meter.

Utility model content

In order to solve the problems of related technologies, the embodiment of the utility model provides a fault simulation device using a simulated smart energy meter, including:

The control host is connected to the power grid operation fault simulator through a wired cable, and the output end of the power grid operation fault simulator is connected to the input end of the simulated smart energy meter;

A voltage transformer and a current transformer are arranged between the program-controlled power supply and the grid operation fault simulator, the input ends of the voltage transformer and the current transformer are connected to the program-controlled power supply, and the voltage transformer and the The output terminal of the current transformer is connected with the grid operation fault simulator.

Optionally, the fault simulation device using a simulated smart energy meter further includes a communication conversion control box, and the control host communicates with the communication conversion control box through a wireless network.

Optionally, a relay is provided in the grid operation fault simulator.

By using the grid operation fault simulator and the simulated smart energy meter to simulate according to the fault command, at the same time, the control host also checks the working status of the grid operation fault simulator and the simulated smart energy meter, so that the trainees can follow the correct fault simulation method Conduct training that increases the skill level of trainees.

Description of drawings

Accompanying drawing 1 is the schematic flow chart of a kind of fault simulation method using simulation intelligent electric energy meter that the utility model proposes;

Accompanying drawing 2 is a partial flow diagram one of a fault simulation method using a simulated smart energy meter proposed by the utility model;

Accompanying drawing 3 is a kind of partial flow schematic diagram 2 of the fault simulation method using the simulated smart electric energy meter proposed by the utility model;

Accompanying drawing 4 is a partial flow diagram three of a fault simulation method using a simulated smart energy meter proposed by the utility model;

Accompanying drawing 5 is the structure diagram of a kind of fault simulation device using simulation smart electric energy meter proposed by the utility model;

Accompanying drawing 6 is another structural diagram of a fault simulation method using a simulated smart energy meter proposed by the utility model.

detailed description

The specific embodiment of the utility model will be further described below in conjunction with accompanying drawing:

The utility model provides a fault simulation method using a simulated smart electric energy meter, as shown in Figure 1, the method includes:

11. The control host selects the target fault from the fault database, generates a fault command corresponding to the target fault, and sends the fault command to the power grid operation fault simulator through a wired cable.

12. The power grid operation fault simulator acquires sample voltage signals and sample current signals, combines fault instructions, performs fault processing on sample voltage signals and sample current signals, generates fault voltage data and fault current data, and passes fault voltage data and fault current data through The wired cable is transmitted to the simulated smart energy meter.

13. The simulated smart energy meter acquires fault voltage data and fault current data, and generates a smart grid fault corresponding to the fault command according to the fault voltage data and fault current data.

In this embodiment, the target faults generated at the simulated smart energy meter are smart grid operation faults, which are mainly divided into three categories, namely, single-phase simulated faults, three-phase three-line offline simulated faults, and three-phase four-line offline simulated faults. Specifically, each fault specifically includes:

Single-phase analog faults: loss of voltage, loss of current, power failure, power reverse.

Three-phase three-line offline fault simulation: phase A phase failure, phase C phase failure, phase A power reverse, phase C power reverse, phase A voltage loss, phase C voltage loss, total voltage loss, phase A current loss, phase C power loss Leakage current, A-phase current cut-off, C-phase current cut-off, power failure, voltage wrong phase sequence, current wrong phase sequence.

Three-phase four-line offline fault simulation: A-phase failure, B-phase failure, C-phase failure, A-phase power reversal, B-phase power reversal, C-phase power reversal, A-phase loss of voltage, B-phase loss of voltage, C-phase Voltage loss, total voltage loss, current loss of phase A, current loss of phase B, current loss of phase C, current interruption of phase A, current interruption of phase B, current interruption of phase C, power failure, voltage wrong phase sequence, Current wrong phase sequence.

All the simulated faults mentioned above are provided with fault signaling corresponding to each fault, and all faults and corresponding fault signaling are stored in the fault library proposed in step 11. The control host selects specific fault signaling and combines it with the equipment information used to simulate the simulated fault to generate a fault command corresponding to the target fault. The fault command contains the equipment information used to simulate the fault and specific fault data. The control host transmits the fault instruction to the power grid operation fault simulator through the wired cable.

In step 12, the power grid operation fault simulator obtains the sample voltage signal and the sample current signal, and performs fault processing on the two signals according to the fault instruction obtained in the previous step, and generates fault voltage data and fault current data. The data has been modulated to have target fault characteristics, and the power grid operation fault simulator transmits the above two fault data to the simulated smart energy meter through a wired cable, so that the latter can generate specific fault content according to the received fault data.

Optionally, as shown in Figure 2, the specific process of obtaining the sample voltage signal and sample current signal by the grid operation fault simulator is as follows:

201. The grid operation fault simulator acquires standard voltage signals and standard current signals from the program-controlled power supply. The program-controlled power supply here rectifies and filters the external power frequency power signal to obtain the processed standard voltage signal and standard current signal.

202. Transmit the standard voltage signal to the voltage input terminal of the voltage transformer located in the grid operation fault simulator, and obtain the sample voltage signal from the voltage output terminal.

203. Transmit the standard current signal to the current input terminal of the current transformer located in the grid operation fault simulator, and obtain the sample current signal from the current output terminal.

The voltage transformer and current transformer set in the power grid operation fault simulator are devices used to convert voltage or current in proportion, and can change high voltage into low voltage and large current into small current for measuring or Protection System. Its function is mainly to convert high voltage or high current into standard low voltage (100V) or standard small current (5A or 1A, both refer to rated value) in proportion, so as to realize the standardization and miniaturization of measuring instruments, protection equipment and automatic control equipment. change. At the same time, the transformer can also be used to isolate the high-voltage system to ensure the safety of people and equipment.

In this embodiment, the voltage transformer and current transformer used are used to convert the standard voltage signal and standard current signal output by the programmable power supply into voltage and current suitable for the power grid operation fault simulator and the subsequent simulation smart energy meter. , that is, the sample voltage signal and sample current signal for fault simulation.

Optionally, as shown in FIG. 3, the grid operation fault simulator in step 12 combines the fault instruction to perform fault processing on the sample voltage signal and the sample current signal to generate fault voltage data and fault current data, include:

301. The grid operation fault simulator acquires fault features from fault instructions. The fault characteristics here are the on-off situation of the circuit when simulating the specific operation fault of the smart grid, the selection of the circuit load, and the parameter range of the fault circuit.

302. The power grid operation fault simulator switches gears for the controllable elements in the circuit where the sample voltage signal and the sample current signal are located according to the fault characteristics, and generates fault current data and fault voltage data with fault characteristics. In order to realize the fault simulation in the specific circuit, a relay matrix unit composed of a large number of relays is set in the specific circuit. By adjusting the different positions of each relay in the matrix unit, the fault simulation can be realized in the circuit.

The controllable element is a relay.

It is worth noting that in the above process, the information flow direction of the fault simulation process is control host → power grid operation fault simulator/simulation smart energy meter, which reflects the process of specific fault generation. In fact, this training device can also complete the fault checking work , as shown in Figure 4, the specific process of this work is:

21. The control host obtains fault state parameters including sample voltage data and sample current data from the grid operation fault simulator, and obtains fault state parameters including fault voltage data and fault current data from the simulated smart energy meter.

22. The control host checks with the fault command generated according to the target fault. It is used to ensure that the faults presented by the grid operation fault simulator and the simulated smart energy meter are consistent with the target fault contained in the fault command of the control host.

23. When the grid operation fault simulator and the simulated smart energy meter are in abnormal working conditions, the control host is ordered to stop the fault simulation, and the grid operation fault simulator and the simulated smart energy meter are maintained. So as to ensure that the power grid operation fault simulator and the simulated smart energy meter are in normal working condition.

Therefore, it is ensured that the simulated faults of the smart grid displayed by the training device to the trainees are effective, and the trainees can improve their skill level after learning and training according to the fault simulation method.

In the above fault checking process, the signal flow direction is: power grid operation fault simulator/simulation smart energy meter → control host, reflecting the process of fault checking.

Embodiment two

In order to accurately control the program-controlled power supply, power grid operation fault simulator and simulated smart energy meter, a communication conversion control box is installed outside the control host, and the control host also communicates with the communication conversion control box. After the communication conversion control box is added, the control host communicates with the power grid operation fault simulator, program-controlled power supply and simulated smart energy meter through the communication conversion control box. Based on the main content of the first embodiment, the fault simulation method after the communication conversion control box is added is described in detail below.

The control host sends the fault command corresponding to the target fault to the communication conversion control box. The communication conversion control box analyzes the fault command to obtain specific fault information. The cable is sent to at least one of the program-controlled power supply, grid operation fault simulator, and simulated smart energy meter, so that after the three receive fault information, the program-controlled power supply can output different types of standard voltage signals and standard current signals, and the grid operation After receiving the standard voltage signal and/or standard current signal output by the programmable power supply, the fault simulator combines the received fault command to generate fault data including fault voltage data and fault current data. The simulated smart energy meter, based on the fault data transmitted by the power grid operation fault simulator, combined with fault signaling, presents a single simulated fault, a simulated fault under three-phase three-line, and a simulated fault under three-phase four-line, so that the trainees can be based on The specific faults that occur, complete the troubleshooting work, realize the simulation of smart grid faults, and realize the actual working ability of the trainees.

After adding the communication conversion control box, the information flow direction of the fault simulation process in the previous article has changed: control host → communication conversion control box → (program-controlled power supply/) power grid operation fault simulator/simulation smart energy meter, which reflects the specific fault generated process.

For the fault checking process, after the communication conversion control box is added, the communication conversion control box obtains the fault state parameters of the two from the power grid operation fault simulator and the simulated smart energy meter, and checks with the target fault in the fault command . At the same time, the working state of the two is determined according to the fault state parameters. When the power grid operation fault simulator and the simulated smart energy meter are in an abnormal working state, the control host is stopped from fault simulation, and the power grid operation fault simulator and the simulated smart meter are activated. Energy meter for repair.

The information flow direction of the corresponding fault checking process becomes: (program-controlled power supply/) power grid operation fault simulator/simulation smart energy meter→communication conversion control box→control host.

Adaptively, after the control host communicates with the simulated smart energy meter through the communication conversion control box, it can also directly send fault instructions to the simulated smart energy meter, so that the latter can present the fault of the smart energy meter and complete the fault simulation of the smart energy meter.

The faults of the smart energy meter here include: ESAM communication faults, ESAM power supply faults, memory data access faults (power runaway), memory power supply faults, measurement accuracy out-of-tolerance faults, metering stop-and-go faults (measurement chip power supply faults), metering Fly away fault, RTC accuracy fault, RTC communication fault, clock battery undervoltage, stop reading battery undervoltage, transformer open circuit fault, load switch fault, meter power supply failure, communication module power supply failure, infrared communication failure, infrared stop reading Function failure, 485 wiring error communication failure, 485 baud rate error communication failure, 485 baud rate offset communication failure, alarm output failure, LCD display lack of picture failure, LCD stop display failure, LCD page turning failure, pulse light output failure , Open end cover failure, open watch cover failure, CPU crash failure, multi-function output failure, button failure, fee control module failure.

In this fault simulation method, all wired cables use RS232 or RS485 interfaces. In order to realize data communication between different components, the wired cable in this simulation device uses an interface based on the RS232 standard. In order to further realize the networking function between different components, an interface based on the RS485 standard is also adaptively used between some components, so that while realizing point-to-point communication, the networking function can also be realized, thereby improving the scope of use of the simulation device .

The utility model provides a fault simulation method using a simulated intelligent electric energy meter, which includes controlling a host computer to select a target fault from a fault library, generating a fault command, and sending the fault command to a power grid operation fault simulator through a communication conversion control box, and combining the power grid Fault instructions, perform fault processing on the sample voltage signal and sample current signal, generate fault voltage data and fault current data, and transmit the fault voltage data and fault current data to the simulated smart energy meter, and the simulated smart energy meter The data generates a smart grid fault corresponding to the fault command. By using the grid operation fault simulator and the simulated smart energy meter to simulate according to the fault command, at the same time, the control host also checks the working status of the grid operation fault simulator and the simulated smart energy meter through the communication conversion control box, so that the trainees can according to Correct fault simulation method for training, thereby improving the skill level of trainees.

Embodiment three

A fault simulation device using a simulated smart energy meter, the fault simulated device using a simulated smart power meter, as shown in Figure 5, includes:

The control host is connected to the power grid operation fault simulator through a wired cable, and the output end of the power grid operation fault simulator is connected to the input end of the simulated smart energy meter;

A voltage transformer and a current transformer are arranged between the program-controlled power supply and the grid operation fault simulator, the input ends of the voltage transformer and the current transformer are connected to the program-controlled power supply, and the voltage transformer and the The output terminal of the current transformer is connected with the grid operation fault simulator.

Optionally, as shown in FIG. 6 , the fault simulation device using a simulated smart energy meter further includes a communication conversion control box, and the control host communicates with the communication conversion control box through a wireless network.

Optionally, a relay is provided in the grid operation fault simulator.

The actual use flow of the device is the same as that in Embodiment 1 and Embodiment 2, and will not be repeated here due to space limitations.

The utility model provides a fault simulation device using a simulated intelligent electric energy meter, which includes a control host that selects a target fault from a fault database, generates a fault command, and sends the fault command to a power grid operation fault simulator, and the power grid combines the fault command to perform a sample The voltage signal and the sample current signal are used for fault processing, generating fault voltage data and fault current data, and transmitting the fault voltage data and fault current data to the simulated smart energy meter, and the simulated smart power meter generates fault instructions according to the fault voltage data and fault current data Corresponding smart grid failure. By using the grid operation fault simulator and the simulated smart energy meter to simulate according to the fault command, at the same time, the control host also checks the working status of the grid operation fault simulator and the simulated smart energy meter, so that the trainees can follow the correct fault simulation method Conduct training that increases the skill level of trainees.

The above is only a description of the preferred examples of the utility model, but should not be construed as a limitation on the claims. The utility model is not only limited to the above examples, and its specific structure is allowed to change. Those skilled in the art can make various changes and deformations according to the utility model. As long as they do not depart from the spirit of the utility model, all should belong to the utility model. scope defined by the claims.

The serial numbers in the above embodiments are for description only, and do not represent the sequence of the components during assembly or use.

Claims (3)

1. A fault simulation device using an emulation smart energy meter, characterized in that, the fault simulation device using an emulation smart energy meter comprises: The control host is connected to the power grid operation fault simulator through a wired cable, and the output end of the power grid operation fault simulator is connected to the input end of the simulated smart energy meter; A voltage transformer and a current transformer are arranged between the program-controlled power supply and the grid operation fault simulator, the input ends of the voltage transformer and the current transformer are connected to the program-controlled power supply, and the voltage transformer and the The output terminal of the current transformer is connected with the grid operation fault simulator. 2. The fault simulation device using the simulated smart energy meter according to claim 1, characterized in that, the fault simulated device using the simulated smart power meter also includes a communication conversion control box, and the control host communicates with the The communications are converted to control box communications. 3. The fault simulation device using a simulated smart energy meter according to claim 1 or 2, characterized in that a relay is provided in the power grid operation fault simulator.