CN206194227U - Low meter analogue means of high confession - Google Patents

Abstract

The utility model provides a simulation device for high supply and low metering, which comprises a fault simulation device, an electric energy simulation device and a metering device respectively connected with the fault simulation device, a control device respectively connected with the fault simulation device, the electric energy simulation device and the metering device, and the electric energy The simulation device is used to output three-phase four-wire voltage and three-phase current with the voltage value of each phase being 220V to the metering device. The fault simulation device is used to simulate line faults and communication faults that occur during electric energy measurement. The metering device is used for metering electric energy simulation. The electric energy output by the device, the control device is used to set the parameters of the electric energy simulation device and the metering device, and control the action of the fault simulation device to simulate various faults. The utility model can simulate various line faults and communication faults occurring in the process of high supply and low calculation, and has simple structure, safe use and convenient operation, and trainees can practice repeatedly to master the countermeasures for various faults.

Description

A high-supply-low-meter simulation device

technical field

The utility model relates to a simulation device for high supply and low calculation.

Background technique

With the implementation of the "SG186" project of the State Grid Corporation of China, the State Grid Corporation of China has intensified its research on the collection of electric energy systems. The State Grid Corporation of China put forward the concept of smart grid, and power information collection is an important part of it. The system mainly realizes "full coverage and full collection" of power information on all power consumption sides. The information collection terminal can realize the collection of electric energy meter data, data management, two-way data transmission, and forwarding or execution of control commands. There are two types of electric energy collection methods: high supply and low meter and high supply and low meter. The high supply and low meter uses a three-phase three-wire electric energy meter on the primary side of the transformer to measure electric energy, and the high supply and low meter uses three-phase four-wire electric energy on the secondary side of the transformer. The meter measures electrical energy. When power supply workers collect power information, various wiring faults and communication faults may occur in both power collection methods, and these faults will cause a series of major losses such as power loss or equipment damage, and even affect work. Personal safety of personnel, how to better avoid and promptly correct various faults skillfully, is a practical problem that must be solved for electricians or emergency repair workers of the power supply system. There are usually two solutions, one is to solve it on the job site, and the other is to use a very simple device for pre-job simulation training. For the first method, due to the limitations of the site, it is impossible to carry out repeated and complete training. For the second method, the training device is extremely simple and cannot fully simulate the problems that may occur in the actual measurement process.

Utility model content

The purpose of this utility model is to address the deficiencies in the prior art, and propose a high-supply and low-meter simulation device, which can fully simulate the problems that may be encountered when collecting electric energy in the way of high-supply and low-meter, with simple structure, convenient operation, and repeated operation practise.

The utility model is realized through the following technical solutions:

A high-supply and low-meter simulation device is used to simulate faults in the process of measuring electric energy by using a high-supply and low-meter method in a distribution network, including a fault simulation device, an electric energy simulation device and a metering device respectively connected to the fault simulation device, and The control device connected with the fault simulation device, the electric energy simulation device and the metering device. The electric energy simulation device is used to output voltage and current to the metering device. The electric energy simulation device includes a plurality of virtual load power sources connected to the control device. The virtual load power source includes A voltage simulation unit and a current simulation unit, the voltage simulation unit includes a sequentially connected voltage waveform storage module, a voltage D/A conversion module and a boost module, and the current simulation unit includes a sequentially connected current waveform storage module, a current D/A conversion module and Boosting current module, the voltage simulation unit outputs a three-phase four-wire voltage of 220V for each phase voltage value of A, B, and C, and the current simulation unit outputs A, B, and C three-phase current. The fault simulation device is connected to the metering device, the voltage waveform storage module and the current waveform storage module are connected to the control device, the fault simulation device is used for simulating line faults and communication faults that occur during electric energy metering, and the metering device is used for metering electric energy simulation The electric energy output by the device, the control device is used to set the parameters of the electric energy simulation device and the metering device, and control the action of the fault simulation device to simulate various faults.

Further, the fault simulation device includes a plurality of fault setting modules connected one-to-one with the plurality of dummy load power sources, and the fault setting module includes a first drive circuit, a first relay group connected to the first drive circuit, The second drive circuit, the second relay group connected with the second drive circuit, the first relay group is arranged on the wire between the dummy load power source and the metering device, for simulating line fault, the second relay group is arranged on The communication connection between the control device and the metering device is used to simulate a communication failure, and the control device controls the actions of the first and second relay groups respectively through the first and second drive circuits.

Further, the metering device includes a first metering module for metering total electric energy and a plurality of second metering modules for metering partial electric energy, and the first metering module communicates with the corresponding virtual load power through one of the fault simulation modules source connection, a plurality of second metering modules are respectively connected to the corresponding dummy load power source through the rest of the fault setting modules, and the first metering module includes the first electric energy connected to the corresponding dummy load power source through the first relay group meter and the first simulation meter connected with the control device through the second relay group, the second metering module includes the second electric energy meter connected with the corresponding dummy load power source through the first relay group and the second electric energy meter connected with the corresponding dummy load power source through the second relay group The second simulation table connected with the control device, the control device can set the readings of the first and second simulation tables, so that the sum of the readings of the first electric energy meter and the first simulation table is the same as that of all the second electric energy meters and the second simulation table. The sum of the readings of the meter is equal to simulate the measurement of total electric energy and partial electric energy.

Further, the first metering module also includes a special variable terminal that is respectively connected to the first and second electric energy meters, the first and second simulation meters and the control device in communication, and the special variable terminal is used to collect the first and second electric energy meters. The data of the two electric energy meters, the first and the second simulation meters are fed back to the control device.

Further, the first and second electric energy meters are both three-phase four-wire electric energy meters.

Further, the control device includes a switch, a host computer and a serial server connected to the switch, the serial server is connected to the electric energy simulation device, the fault simulation module and the metering device, and the switch is connected to the metering device.

Further, it also includes a timing device connected to the fault simulation device, which is used to display the current time or count down.

Further, it also includes a voice device connected to the control device, which is used to issue voice prompts at a specific time.

The utility model has the following beneficial effects:

1. The utility model can simulate a variety of line failures and communication failures that occur during the process of high supply and low calculation. It has simple structure, safe use and convenient operation. The trained personnel can practice repeatedly to master the countermeasures for various failures.

2. The utility model can simulate the normal high-supply and low-counting process, so that the trained personnel can understand each step in the measurement process more clearly, and improve the theoretical level and practical operation ability of the trained personnel.

3. The utility model has countdown and voice prompt functions, and can be used for training and testing of trained personnel.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Fig. 1 is a functional block diagram of the utility model.

Fig. 2 is a schematic diagram of an embodiment of the utility model.

Fig. 3 is a functional block diagram of the electric energy simulation device of the present invention.

Fig. 4 is a functional block diagram of the fault simulation device of the present invention.

detailed description

As shown in Figures 1 to 4, the high supply and low meter simulation device includes a control device 1, an electric energy simulation device 2, a fault simulation device 3, a metering device 4, a timing device 5 and a voice device 6, and an electric energy simulation device 2 and a metering device 4 They are respectively connected to the fault simulation device 3, and the control device 1 is respectively connected to the electric energy simulation device 2, the fault simulation device 3 and the metering device 4. The electric energy simulation device 2 is used to output voltage and current to the metering device 4, and the fault simulation device 3 is used to simulate For various line faults and communication faults that occur during electric energy measurement, the metering device 4 is used to measure the electric energy output by the electric energy simulation device 2, and the control device 1 is used to set the parameters of the electric energy simulation device 2 and the metering device 4, and to control the fault simulation device 3 The action is to simulate various failures. The timing device 5 is connected with the fault simulation device 3 for displaying the current time or counting down. The voice device 6 is connected with the control device 1 for giving voice prompts at a specific time.

The control device 1 includes a switch 12, a host computer 11 and a serial port server 13 respectively connected to the switch 12 in communication. Connection; the power simulation device 2 includes three dummy load power sources 21 connected in communication with the serial port server 13 of the control device 1, the dummy load power source 21 includes a voltage simulation unit 22 and a current simulation unit 23, and the voltage simulation unit 22 includes sequentially connected Voltage storage module 221, voltage D/A conversion module 222 and booster module 223, voltage storage module 221 is connected with serial port server 13, and three-phase four-wire digital voltage waveforms with different parameters are preset therein, which can be set differently by host computer 11 voltage parameters, the voltage storage module 221 outputs corresponding digital voltage waveforms according to the parameters set by the host computer 11, and is converted into analog voltage waveforms by the voltage D/A conversion module 222, and the analog voltage waveforms are boosted by the boost module 223 and then output A, The voltage values of B and C phases are three-phase four-wire voltages of 220V. The booster module 223 is connected to the metering device 4 through the fault simulation device 3. The current simulation unit 23 includes a current storage module 231 and a current D/A conversion module connected in sequence. 232 and the current raising module 233, the current storage module 231 is connected to the serial port server 13, in which three-phase digital current waveforms with different parameters are preset, different current parameters can be set through the host computer 11, and the current storage module 231 is set according to the host computer 11 The parameters output corresponding digital current waveforms, which are converted into analog current waveforms by the current D/A conversion module 232, and the analog current waveforms output A, B, and C three-phase currents after being raised by the current raising module 233. The simulation device 3 is connected with the metering device 4; the fault simulation device 3 includes three fault setting modules 31 connected one-to-one with the three dummy load power sources 21, and the fault setting module 31 includes a first drive circuit 32 and a first drive circuit 32 connected to the first relay group 33, the second drive circuit 34, and the second relay group 35 connected to the second drive circuit 34, the first relay group 33 is arranged on the wire between the virtual load power source 21 and the metering device 4 , for simulating line faults, the second relay group 35 is arranged on the communication connection between the serial port server 13 of the control device 1 and the metering device 4, for simulating communication faults, the first drive circuit 32 and the second drive circuit 34 are both Communicatively connected with the serial port server 13, the host computer 11 controls the actions of the first relay group 33 and the second relay group 35 respectively through the first drive circuit 32 and the second drive circuit 34; the metering device 4 includes a first metering device for metering the total electric energy Module 41, two second metering modules 42 for metering and sub-electrical energy respectively connected with the first metering module 41, the first metering module 41 passes one of the fault setting modules 31 and the virtual load power corresponding to the fault setting module 31 Source 21 is connected, and the two second metering modules 42 are respectively set by the remaining two faults The module 31 is connected with the corresponding virtual load power source 21, the first metering module 41 includes a first electric energy meter and a first simulation meter, and the second metering module 42 includes a second electric energy meter and a second simulation meter, and in the first metering module 41 It also includes special variable terminals that communicate with each electric energy meter and each simulation meter respectively. The first electric energy meter and the second electric energy meter are all three-phase four-wire electric energy meters, and their A, B, and C phase voltage interfaces are respectively connected to the corresponding terminals through wires. The step-up module 223 of the dummy load power source 21 is connected, the A, B, and C phase current interfaces of the first electric energy meter and the second electric energy meter are respectively connected with the step-up module 233 of the corresponding virtual load power source 21 through wires, and the second One simulation table and the second simulation table are respectively connected with the serial port server 13 by the RS485 communication line, and the upper computer 11 can set the readings of the first simulation table and the second simulation table so that the sum of the readings of the first electric energy meter and the first simulation table It is equal to the sum of the readings of all the second watt-hour meters and the second simulation meters to simulate the measurement of the total electric energy and the divided electric energy. The data of the energy meter, the first simulation meter and the second simulation meter are fed back to the upper computer 11, and the upper computer 11 can simulate the parameter setting error of the special variable terminal; the first relay group 33 is set on the first electric energy meter or the second electric energy meter On the wires between the corresponding virtual load power source 21, it is used to control the on-off of these wires to simulate various line faults. The second relay group 35 is arranged between the first simulation table or the second simulation table and the serial port server 13 The RS485 communication lines between them are used to control the on-off of these communication lines to simulate various communication failures.

The working principle of the utility model is as follows:

During normal operation, set the voltage and current parameters of each dummy load power source 21 through the host computer 11, and control the action of the relays in the first and second relay groups, so that each dummy load power source 21 and the first and second electric energy meters are correctly connected. Connect and make the control device 1 correctly connected with the first and second simulation meters, set the readings of each first and second simulation meters, so that the sum of the readings of the first electric energy meter and the first simulation meter is the same as that of all the second electric energy meters and The sum of the readings of the second simulation meter is equal, showing the trainees the correct metering wiring method, the relationship between the total electric energy and the divided electric energy;

In the event of a fault, the upper computer 11 controls the action of the corresponding relays in the first relay group 33, which can simulate the line faults between the first and second electric energy meters and the virtual load power source 21, such as voltage disconnection, voltage wrong phase sequence, and current short circuit , current open circuit, current wrong phase sequence, etc.; the upper computer 11 controls the corresponding relay action in the second relay group 35, and can simulate the communication failure between the first and second simulation meters and the serial port server 13, including RS485A disconnection, RS485B disconnection, etc. line, RS485AB reverse connection, etc.; the upper computer 11 can set the fault that the IP address of the special transformer terminal is different from the actual master station IP address.

When a fault occurs, the trained personnel can preliminarily judge the fault type by observing the display of the first and second electric energy meters, the first and the second simulation meter, and use tools to check the device circuit, finally determine the fault point and clear the fault.

When the trainees are trained and tested, the countdown can be set by the timing device 5, and the voice device 6 is set to perform a voice prompt when the test is halfway through and the test is about to end.

The above is only a preferred embodiment of the utility model, so the scope of implementation of the utility model cannot be limited with this, that is, equivalent changes and modifications made according to the patent scope of the utility model and the content of the specification should still be carried out. It belongs to the scope covered by the utility model patent.

Claims (8)

1. A high-supply and low-meter simulation device for simulating the process of using a high-supply and low-meter method to measure electric energy in a distribution network, characterized in that it includes a fault simulation device, an electric energy simulation device and a metering device respectively connected to the fault simulation device device, a control device connected to the fault simulation device, the power simulation device and the metering device respectively, the power simulation device is used to output voltage and current to the metering device, the power simulation device includes a plurality of dummy load power sources connected to the control device, and the dummy load The power source includes a voltage simulation unit and a current simulation unit. The voltage simulation unit includes a voltage waveform storage module, a voltage D/A conversion module and a boost module connected in sequence. The current simulation unit includes a current waveform storage module and a current D/A module connected in sequence. Conversion module and current boost module, the voltage simulation unit outputs three-phase four-wire voltage of 220V for each phase of A, B, and C, the current simulation unit outputs A, B, and C three-phase current, boost module and current boost module Both are connected to the metering device via the fault simulation device, the voltage waveform storage module and the current waveform storage module are connected to the control device, the fault simulation device is used to simulate line faults and communication faults that occur during electric energy measurement, and the metering device is used to The electric energy output by the electric energy simulation device is measured, and the control device is used to set the parameters of the electric energy simulation device and the metering device, and control the action of the fault simulation device to simulate various faults. 2. A kind of high-supply-low meter simulation device according to claim 1, characterized in that: said fault simulation device comprises a plurality of fault setting modules connected one-to-one with said plurality of dummy load power sources, and the fault setting module The module includes a first drive circuit, a first relay group connected to the first drive circuit, a second drive circuit, and a second relay group connected to the second drive circuit, and the first relay group is set between the dummy load power source and metering The wires between the devices are used to simulate line faults, and the second relay group is set on the communication wiring between the control device and the metering device to simulate communication faults. The control device passes through the first and second The two drive circuits respectively control the actions of the first and second relay groups. 3. A high supply and low meter simulation device according to claim 2, characterized in that: said metering device comprises a first metering module for metering total electric energy and a plurality of second metering modules for metering partial electric energy , the first metering module is connected to the corresponding virtual load power source through one of the fault simulation modules, and multiple second metering modules are respectively connected to the corresponding virtual load power source through the remaining fault setting modules, and the first metering module includes The first electric energy meter connected to the corresponding dummy load power source through the first relay group and the first simulation meter connected to the control device through the second relay group, the second metering module includes The second watt-hour meter connected with the corresponding virtual load power source and the second simulation meter connected with the control device through the second relay group, the control device can set the readings of the first and second simulation meters, so that the first watt-hour meter The sum of the readings of the first simulation meter is equal to the sum of the readings of all the second electric energy meters and the second simulation meters, so as to simulate the measurement of the total electric energy and the divided electric energy. 4. A kind of high-supply and low-meter simulation device according to claim 3, characterized in that: the first metering module also includes the first and second electric energy meters, the first and second simulation meters and the control meter respectively. A special transformer terminal connected to the device through communication. The special transformer terminal is used to collect the data of each of the first and second electric energy meters, and the first and second simulation meters and feed them back to the control device. 5. A high-supply-low-meter simulation device according to claim 3, characterized in that: said first and second electric energy meters are three-phase four-wire electric energy meters. 6. According to claim 1 or 2 or 3 or 4 or 5 described a kind of simulation device for high supply and low calculation, it is characterized in that: said control device comprises a switch, a host computer and a serial port server respectively connected to the switch in communication, and the serial port The server communicates with the electric energy simulation device, the fault simulation module and the metering device, and the switch communicates with the metering device. 7. A high supply and low meter simulation device according to claim 1 or 2 or 3 or 4 or 5, characterized in that: it also includes a timing device connected to the fault simulation device for displaying the current time or counting down . 8. A high supply and low meter simulation device according to claim 1 or 2 or 3 or 4 or 5, characterized in that: it also includes a voice device connected to the control device for issuing a voice prompt at a specific time .