CN206379025U - Electric energy metrical actual training device - Google Patents

Abstract

An electric energy metering training device, comprising: a power inlet simulator, used to provide power; the circuit breaker input terminal in the power distribution simulation unit is connected to the power inlet simulator through the primary side of the first current transformer, and the first The primary side and secondary side of the current transformer are connected to the first terminal block of the first terminal box, and the second terminal block is connected to the first three-phase four-wire electric energy meter; the single-phase user distribution box in the single-phase user analog unit The input end is connected to the output end of the circuit breaker, and the output end of the single-phase user distribution box is respectively connected to each load in the first simulated load group through each single-phase electric energy meter in the single-phase electric meter box of the user; The transformer metering simulation module and the straight-through electric energy meter metering simulation module are respectively connected to the output end of the circuit breaker. It can realize the simulation setting of one or more of the main circuit failure, metering circuit failure and electric energy meter failure in the training power supply measurement, so as to expand the function of the electric energy measurement training device.

Description

Electric energy measurement training device

technical field

The utility model relates to the field of training and training devices, in particular to an electric energy measurement training device.

Background technique

Electric energy metering device is the "scale" in electricity trading, and its accuracy is directly related to the interests of all parties in electricity trading. Therefore, it is very important for electric power practitioners to master the installation and fault finding of electric energy metering devices. The electric energy metering training device is developed for electric power practitioners to improve their metering business needs. However, the existing electric energy metering training devices have a relatively single function, and only have the function of simulating the wrong wiring of the metering device, or the simulation training function of individual metering faults. The lack of training functions of the electric energy metering training device limits the types of actual metering faults that the trainees can access to during learning, and cannot comprehensively improve the electric energy metering business skills of electric power practitioners.

Therefore, how to expand the functions of the electric energy metering training device so that the electric power practitioners can receive the training more comprehensively has become an urgent problem to be solved.

Utility model content

The technical problem to be solved by the utility model is to expand the function of the electric energy metering training device so that it can provide more comprehensive training experiments.

For this reason, the utility model discloses a training device for electric energy measurement, which includes: a power supply line simulator, which is used to simulate the user's distribution network, and provides power to the electric energy measurement training device; a power distribution simulation unit, including: a circuit breaker, The first current transformer, the first terminal box and the first three-phase four-wire watt-hour meter; the input end of the circuit breaker is connected to the power inlet simulator through the primary side of the first current transformer; the primary side of the first current transformer The side and the secondary side are connected to the first terminal block of the first terminal box; the second terminal block of the first terminal box is connected to the first three-phase four-wire electric energy meter; the first terminal block of the first terminal box and The second terminal blocks of the first terminal box are connected one by one; the single-phase user analog unit includes: single-phase user distribution box, single-phase user ammeter box and the first analog load group; the output terminal of the circuit breaker is connected To the input end of the single-phase user distribution box; the output end of the single-phase user distribution box is respectively connected to each load in the first analog load group through each single-phase electric energy meter in the single-phase user electric meter box; each single-phase electric energy The meters are in one-to-one correspondence with each load; the three-phase user simulation unit includes: the transformer measurement simulation module and the through-energy meter measurement simulation module, and the transformer measurement simulation module and the through-energy meter measurement simulation module are respectively connected to the output end of the circuit breaker . Preferably, the single-phase user power distribution box includes: single-phase user power distribution main switch, single-phase user incoming line switch and single-phase user outgoing line switch, the output end of the circuit breaker is connected to the single-phase user power distribution main switch, single-phase user incoming line switch Line switch and the input ends of each single-phase electric energy meter in the single-phase user meter box are connected in series; the output ends of each single-phase electric energy meter in the single-phase consumer electric meter box Each load is connected in series in sequence.

Preferably, the transformer metering simulation module includes: a three-phase user distribution box, a three-phase user meter box and a second simulated load; the output end of the circuit breaker is connected to the input end of the three-phase user distribution box, and the three-phase user distribution box The output end of the box is connected to the second simulated load through the output end of the three-phase user ammeter box.

Preferably, the metering analog module of the straight-through electric energy meter includes: a three-phase user metering box and a third analog load; the input end of the three-phase user metering box is connected to the output end of the circuit breaker, and the output end of the three-phase user metering box is connected to the third analog load connect.

Preferably, the three-phase user distribution box includes: a first three-phase incoming switch, a second current transformer, and a first three-phase outgoing switch; an output terminal of the circuit breaker, the first three-phase incoming switch, and a second current transformer The primary side of the current transformer, the first three-phase outlet switch and the second analog load are connected in series in sequence; the primary side and secondary side of the second current transformer are connected to the input end of the three-phase user ammeter box.

Preferably, the three-phase user meter box includes: a second terminal box and a second three-phase four-wire electric energy meter, the first terminal block of the second terminal box is connected to the primary side and the secondary side of the second current transformer; The two-three-phase four-wire watt-hour meter is connected to the second terminal block of the second terminal box; the first terminal block of the first terminal box is connected to the second terminal block of the first terminal box one by one.

Preferably, the three-phase user metering box includes: a three-phase four-wire straight-through watt-hour meter, a second three-phase incoming switch and a second three-phase outgoing switch, an output terminal of the circuit breaker, a second three-phase incoming switch, a three-phase four The line is directly connected to the energy meter, the second three-phase outlet switch, and the third analog load are connected in series in sequence.

The electric energy measurement training device provided by the embodiment of the utility model provides power through the power supply line simulator; the circuit breaker input terminal in the power distribution simulation unit is connected to the power supply line simulator through the primary side of the first current transformer, and the second The primary side and the secondary side of a current transformer are connected to the first terminal block and the first terminal block, and the second terminal block is connected to the first three-phase four-wire electric energy meter, so that the main circuit fault in the measurement training device can be set, The main metering circuit is faulty; the input end of the single-phase user distribution box in the single-phase user analog unit is connected to the output end of the circuit breaker, and the output end of the single-phase user distribution box is respectively connected through each single-phase electric energy meter in the single-phase user electric meter box To each load in the first simulated load group, it can be set to simulate the single-phase electric energy meter fault in the single-phase user; the transformer metering simulation module and the straight-through electric energy meter metering analog module in the three-phase user simulation unit are respectively connected to the output end of the circuit breaker , where the transformer metering simulation module can set the metering circuit fault of the three-phase user access transformer; the direct-through electric energy meter metering simulation module can set the three-phase user metering circuit fault without the transformer. It can realize one or more of main circuit faults, main metering circuit faults, single-phase electric energy meter faults in single-phase users, three-phase user mutual inductance metering circuit faults, and non-transformer three-phase user metering circuit faults in the training power supply metering A variety of simulation settings can be used to expand the functions of the electric energy measurement training device, so that electric power practitioners can receive practical training more comprehensively.

Description of drawings

In order to more clearly illustrate the specific implementation of the utility model or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific implementation or the prior art will be briefly introduced below. Obviously, the following descriptions The accompanying drawings are some implementations of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative work.

Fig. 1 is the wiring schematic diagram of the electric energy measurement training device in the utility model embodiment 1;

Fig. 2 is a schematic diagram of the wiring of the single-phase user simulation unit in Embodiment 1 of the utility model;

Fig. 3 is a schematic diagram of the wiring of the three-phase user simulation unit in Embodiment 1 of the present utility model.

detailed description

The technical solutions of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the utility model, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, or it can be the internal communication of two components, it can be wireless connection, or it can be wired connection. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not constitute conflicts with each other.

Example 1

This embodiment provides an electric energy metering training device. As shown in FIG. Unit 3, where:

The power inlet simulator 4 is used to simulate the user distribution network and provide power to the electric energy metering training device. In a specific embodiment, the power supply line simulator 4 can simulate the user's power distribution network or substation in the actual situation, and can provide three-phase four-wire power supply for the electric energy metering training device. The external mains power can be connected to the power distribution simulation unit 1 through the power inlet simulator 4 .

The power distribution simulation unit 1 includes: a circuit breaker 11, a first current transformer 12, a first terminal box 13 and a first three-phase four-wire watt-hour meter 14; The side is connected with the power inlet simulator 4; the primary side and the secondary side of the first current transformer 12 are connected to the first terminal block of the first terminal box 13; the second terminal block of the first terminal box 13 is connected to The first three-phase four-wire electric energy meter 14 ; the first terminal block 13 of the first terminal block 13 and the second terminal block 13 are connected one by one. In a specific embodiment, after the three-phase four-wire power supply enters the simulator 4 through the power supply, the A, B, and C three-phase lines shown in FIG. 1 are respectively connected through the primary side of the corresponding first current transformer 12 To the input end of the circuit breaker 11 , the N-phase line may not pass through the circuit breaker 11 . Specifically, the power distribution simulation unit 1 can also set a knife switch 15 between the first current transformer simulator 12 and the circuit breaker 11, and the power incoming line simulator 4, the primary side of the first current transformer 12, the knife switch 15 and Circuit breakers 11 can be connected in series to form the main circuit of the electric energy metering training device. In this embodiment, the above-mentioned devices that make up the main circuit and the connections between the devices can be used to set the main circuit fault. , lack of phase, one or more faults in phase failure; the primary side and the secondary side of the first current transformer 12 are respectively connected to the first terminal block of the first terminal box 13, the first terminal box 13 The second terminal block is connected to the first three-phase four-wire electric energy meter 14, which can form a main metering circuit. In this embodiment, the analog fault of the power distribution unit can be set through the first terminal block and the second terminal block of the first terminal box 13. The first terminal block and the second terminal block can be interchanged and used flexibly. Disassembly line, for example, can use the first terminal block and the second terminal block to set one or more faults in metering wrong wiring, phase loss, phase failure, current reverse polarity and reverse phase sequence, by setting the main circuit and One or more faults of the main metering circuit ensure the diversity of fault types that can be simulated by the electric energy metering training device, and expand the functions of the electric energy metering training device.

The single-phase user simulation unit 2 includes: a single-phase user distribution box 21, a single-phase user meter box 22 and a first simulated load group 23; the output end of the circuit breaker 11 is connected to the input end of the single-phase user distribution box 21; The output end of the phase user distribution box 21 is connected to each load in the first simulated load group 23 through each single-phase electric energy meter in the single-phase electric meter box 22; each single-phase electric energy meter corresponds to each load respectively. In a specific embodiment, the input end of the single-phase user distribution box 21 of the single-phase user simulation unit 2 can be connected to the output end of the circuit breaker 11 so that the single-phase user simulation unit 2 can be connected to the main circuit, three-phase four-wire After the power supply passes through the single-phase user distribution box 21, each single phase in the three-phase four-wire power supply is respectively connected to each single-phase electric energy meter in the single-phase user meter box 22, and each single-phase electric energy meter in the single-phase user meter box 22 The electric energy meters are connected to each load of the simulated load group 23 in a one-to-one correspondence. Specifically, each single-phase line in the three-phase power supply can be connected with three single-phase electric energy meters correspondingly, and the single-phase user electric meter box 22 can be provided with nine single-phase electric energy meters, and nine different electric energy meters can be set according to the nine single-phase electric energy meters. fault, nine single-phase electric energy meters as shown in Figure 2, the first single-phase electric energy meter 2211 can be set to a white screen fault, the second single-phase electric energy meter 2212 can be set to a black screen fault, and the third single-phase electric energy meter 2213 can be set to a clock Fault, the fourth single-phase watt-hour meter 2214 can be set for low clock power supply voltage fault, the fifth single-phase watt-hour meter 2215 can be set for serial communication module fault, the sixth single-phase watt-hour meter 2216 can be set for internal and external meter number inconsistency fault, the seventh single-phase The energy meter 2217 can be set with a reverse metering fault, and the eighth single-phase watt-hour meter 2218 and the ninth single-phase watt-hour meter 2219 can be set with a metering series fault. In a specific embodiment, one or more of the above-mentioned faults can be set. The function of the electric energy measurement training device is further expanded. It should be noted that nine single-phase watt-hour meters are listed in this embodiment, but more or less single-phase watt-hour meters are all feasible.

The three-phase user simulation unit 3 includes: a transformer metering simulation module 31 and a direct energy meter metering simulation module 32 , and the transformer metering simulation module 31 and the direct energy meter metering simulation module 32 are respectively connected to the output end of the circuit breaker 11 . In the present embodiment, the transformer measurement simulation module 31 and the straight-through electric energy meter measurement simulation module 32 are respectively connected to the output end of the circuit breaker 11, so that the three-phase user simulation unit 3 can be connected with the main circuit of the electric energy measurement training device, so that The three-phase four-wire power supply is connected to the three-phase user simulation unit 3 . In this embodiment, the metering circuit fault of the three-phase user connected to the transformer and the metering circuit fault of the three-phase user without a transformer can be respectively set through the metering simulation module 31 of the transformer and the metering simulation module 32 of the direct energy meter. The function of the electric energy measurement training device is further expanded.

Provide power through the power supply line simulator. In the power distribution simulation unit, the main circuit fault and the main metering circuit fault in the metering can be set; the single-phase user simulation unit can be set to simulate the failure of the single-phase electric energy meter in the single-phase user; the three-phase user The transformer metering simulation module in the simulation unit can set the metering circuit fault of the three-phase user access transformer; the direct-through electric energy meter metering simulation module can set the three-phase user metering circuit fault without transformer. It can realize one or more of main circuit faults, main metering circuit faults, single-phase electric energy meter faults in single-phase users, three-phase user mutual inductance metering circuit faults, and non-transformer three-phase user metering circuit faults in the training power supply metering A variety of simulation settings can be used to expand the functions of the electric energy measurement training device, so that electric power practitioners can receive practical training more comprehensively.

In a preferred embodiment, as shown in Figure 2, the single-phase user distribution box 21 may include: a single-phase user power distribution main switch 211, a single-phase user incoming line switch 212 and a single-phase user outgoing line switch 213, wherein the open circuit The output end of the device 11 is connected in series with the single-phase user power distribution main switch 211, the single-phase user incoming line switch 212, and the input ends of each single-phase electric energy meter in the single-phase electric meter box 22; The single-phase electric energy meter is connected in series with the single-phase subscriber outlet switch 213 and each load in the first simulated load group 23 in sequence. In a specific embodiment, after the three-phase four-wire power supply is connected to the single-phase user power distribution main switch 211 of the single-phase user distribution box 21 through the output end of the circuit breaker 11, the three-phase four-wire power supply can be divided into two types: The line ends corresponding to the number of single-phase electric energy meters in the single-phase user meter box 22 are respectively connected to the single-phase user incoming line switch 212, and the number of switches of the single-phase user incoming line switch 212 is the same as the number of single-phase electric energy meters in the single-phase user electric meter box 22. The number of phase electric energy meters can correspond to or be more than the number of electric energy meters in the single-phase user electric meter box 22. Each outlet terminal of each single-phase electric energy meter in the phase user meter box 22 is correspondingly connected with the first end of each switch of the single-phase user outlet switch 213, and the second end of each switch of the single-phase user outlet switch 213 is connected to each single-phase user outlet switch 213 respectively. The phase watt-hour meters correspond to each load in the first simulated load group 23 one by one. Each load in the first simulated load group 23 can use an incandescent lamp, so that the connection status of each channel can be easily observed during the training process. In this embodiment, different single-phase electric energy meters are connected to corresponding incoming line switches, and then connected to corresponding loads through corresponding outgoing line switches, so that all single-phase electric energy meters are relatively independent and fully simulate single-phase user The relatively independent status of each household in the system does not affect each other when the single-phase electric energy meter is faulty.

In a preferred embodiment, as shown in Figure 1, the transformer metering simulation module 31 includes: a three-phase user distribution box 311, a three-phase user ammeter box 312 and a second simulation load 313; the output end of the circuit breaker 11 is connected to The input end of the three-phase user distribution box 311 and the output end of the three-phase user distribution box 311 are connected to the second analog load 313 through the three-phase user electric meter box 312 . In a specific embodiment, the three-phase four-wire power supply is connected to the input end of the three-phase user distribution box 311 of the transformer metering simulation module 31 through the output end of the circuit breaker 11, and the output end of the three-phase user distribution box 311 is connected to To the input terminal in the three-phase consumer ammeter box 312, the output terminal of the three-phase consumer ammeter box 312 is connected to the second simulated load.

In a preferred embodiment, as shown in FIG. 1 , the metering simulation part 32 of the straight-through electric energy meter includes: a three-phase user metering box 321 and a third simulated load 322, and the input end of the three-phase user metering box 321 is connected to the output of the circuit breaker 11 terminal, and the output terminal of the three-phase user metering box 321 is connected to the third simulated load 322 .

In a preferred embodiment, as shown in Figure 2, the three-phase user distribution box 311 includes: a first three-phase incoming switch 3111, a second current transformer 3112 and a first three-phase outgoing switch 3113; the output of the circuit breaker 11 end, the first three-phase incoming switch 3111, the primary side of the second current transformer 3112, the first three-phase outgoing switch 3113 and the second simulated load 313 are connected in series in sequence; the primary side and the secondary side of the second current transformer 3112 connected to the input terminals of the three-phase user meter box 312 respectively. In a specific embodiment, the three-phase four-wire power supply is connected to the input end of the first three-phase incoming switch 3111 of the three-phase user distribution box 311 through the output end of the circuit breaker 11 to provide three-phase four-wire power supply, and the first three-phase The three-phase lines in the output end of the phase incoming line switch 3111 are respectively connected to the input end of the first three-phase outgoing line switch 3113 through the primary side of the second current transformer 3112, and the output end of the first three-phase outgoing line switch 3113 is connected to the first three-phase outgoing line switch 3113. Two simulated loads. The primary side and the secondary side of the second current transformer 3112 are connected to the input end of the three-phase user meter box 312 . In this embodiment, the first three-phase incoming line switch 3111 and the first three-phase outgoing line switch 3113 can be used to set one or more of the three-phase user transformer metering analog module power supply loop wrong wiring, phase loss, and phase failure Faults further expand the functions of the electric energy metering training device.

In a preferred embodiment, as shown in Figure 3, the three-phase user meter box 312 includes: a second terminal box 38 and a second three-phase four-wire watt-hour meter 3121, the second terminal box 38 first terminal block and the second The primary side and the secondary side of the second current transformer 3112 are connected; the second three-phase four-wire electric energy meter 3121 is connected to the second terminal block of the second terminal box 3122 . The first connection row of the first connection terminal box 3122 is connected to the second connection row of the first connection terminal box 3122 one by one. In a specific embodiment, the simulated fault of the three-phase user can be set through the first terminal block and the second terminal block of the second terminal box 3122, for example, the phase loss, phase failure, One or more faults in current reverse polarity and reverse phase sequence further expand the functions of the electric energy metering training device.

In a preferred embodiment, as shown in Figure 3, the three-phase user metering box 321 includes: a three-phase four-wire straight-through watt-hour meter 3211, a second three-phase incoming switch 3212 and a second three-phase outgoing switch 3213; circuit breaker 11 The output end of the output terminal, the second three-phase incoming switch 3212, the three-phase four-wire straight-through electric energy meter 3211, the second three-phase outgoing switch 3213, and the third analog load 322 are connected in series in sequence. In a specific embodiment, setting the three-phase four-wire straight-through electric energy meter 3211 can be used to simulate a user who directly connects the mains electricity to the electric energy meter without passing through a current transformer. In this embodiment, the second three-phase incoming switch 3212 and the second three-phase outgoing switch 3213 can be used to simulate phase loss, phase failure, current reverse polarity and reverse current One or more faults in the phase sequence further expands the functions of the electric energy metering training device.

All the circuits of the electric energy measurement training device provided by the embodiment of the utility model can be arranged behind the installation plate (not shown in the figure) of the electric energy measurement training device, so that the set faults can be conveniently hidden. The line connector in the electric energy measurement training device can be set as a plug, which is convenient for flexible setting of each power circuit, each metering circuit, single-phase electric energy meter and three-phase four-wire in the power distribution simulation unit, single-phase user simulation unit and three-phase user simulation unit One or more of the various faults of the electric energy meter, so that the functions of the electric energy metering training device can be expanded, the fault can be set more conveniently and flexibly, the practicability of the electric energy metering training device is improved, and the electric power practitioners can be more comprehensive. receive practical training. Power supply is provided through the power inlet simulator; the circuit breaker input terminal in the power distribution simulation unit is connected to the power inlet simulator through the primary side of the first current transformer, and the primary side and the secondary side of the first current transformer are connected to The first terminal block of the first terminal box is connected to the first terminal block, and the second terminal block is connected to the first three-phase four-wire watt-hour meter. The main circuit fault and the main metering circuit fault in the metering training device can be set; The input end of the phase user distribution box is connected to the output end of the circuit breaker, and the output end of the single-phase user distribution box is respectively connected to each load in the first analog load group through each single-phase electric energy meter in the single-phase user electric meter box, which can be set Simulate single-phase watt-hour meter faults in single-phase users; the transformer metering simulation module and direct-through watt-hour meter metering simulation module in the three-phase user simulation unit are respectively connected to the output end of the circuit breaker, and the transformer metering simulation module can be set for three-phase user connection The metering circuit fault of the input transformer; the direct-through electric energy meter metering simulation module can be set for the fault of the metering circuit fault of the three-phase user without a transformer. It can realize one or more of main circuit faults, main metering circuit faults, single-phase electric energy meter faults in single-phase users, three-phase user mutual inductance metering circuit faults, and non-transformer three-phase user metering circuit faults in the training power supply metering A variety of simulation settings can be used to expand the functions of the electric energy measurement training device, so that electric power practitioners can receive practical training more comprehensively.

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or changes derived therefrom are still within the protection scope of the utility model of the present invention.

Claims (7)

1. An electric energy measurement training device, characterized in that, comprising: A power inlet simulator (4), used to simulate the user distribution network, and provide power to the electric energy metering training device; A power distribution simulation unit (1), comprising: a circuit breaker (11), a first current transformer (12), a first terminal box (13) and a first three-phase four-wire electric energy meter (14); the circuit breaker The input terminal of (11) is connected with described power inlet simulator (4) through the primary side of the first current transformer (12); The primary side and the secondary side of the first current transformer (12) are connected to the first terminal block of the first terminal box (13); the second terminal block of the first terminal box (13) Connected to the first three-phase four-wire watt-hour meter (14); one by one between the first terminal block of the first terminal box (13) and the second terminal block of the first terminal box (13) Pass; Single-phase user simulation unit (2), comprising: single-phase user power distribution box (21), single-phase user ammeter box (22) and first simulation load group (23); the output end of described circuit breaker (11) is connected To the input end of the single-phase user distribution box (21); the output end of the single-phase user distribution box (21) is respectively connected to each single-phase electric energy meter in the single-phase user electric meter box (22) To each load in the first simulated load group (23); each of the single-phase electric energy meters is in one-to-one correspondence with each of the loads; Three-phase user simulation unit (3), comprising: transformer metering simulation module (31) and straight-through electric energy meter metering simulation module (32), described transformer metering simulation module (31) and described straight-through electric energy meter metering simulation module ( 32) are respectively connected to the output ends of the circuit breakers (11). 2. The electric energy metering training device according to claim 1, characterized in that, the single-phase user distribution box (21) comprises: Single-phase user power distribution main switch (211), single-phase user incoming line switch (212) and single-phase user outgoing line switch (213), the output end of the circuit breaker (11) is connected to the single-phase user power distribution main switch (211), the input ends of each single-phase electric energy meter in the single-phase user incoming line switch (212), the described single-phase electric meter box (22) in the single-phase electric meter box (22) are connected in series successively; The output ends of the individual single-phase electric energy meters are connected in series with the single-phase subscriber outlet switch (213) and each load in the first simulated load group (23) in sequence. 3. The electric energy metering training device according to claim 1, characterized in that, the transformer metering simulation module (31) comprises: A three-phase user distribution box (311), a three-phase user electric meter box (312) and a second simulated load (313); the output end of the circuit breaker (11) is connected to the three-phase user distribution box (311) The input end of the three-phase user distribution box (311) is connected to the second analog load (313) through the three-phase user electric meter box (312). 4. The electric energy metering training device according to claim 1, characterized in that, the direct-through electric energy meter measurement simulation module (32) comprises: Three-phase user metering box (321) and the third simulated load (322); the input end of the three-phase user metering box (321) is connected to the output end of the circuit breaker (11), and the three-phase user metering box ( 321) is connected to the third analog load (322). 5. The electric energy metering training device according to claim 3, characterized in that, the three-phase user distribution box (311) comprises: The first three-phase incoming line switch (3111), the second current transformer (3112) and the first three-phase outgoing line switch (3113); the output terminal of the circuit breaker (11), the first three-phase incoming line switch (3111), the primary side of the second current transformer (3112), the first three-phase outlet switch (3113) and the second simulated load (313) are connected in series in sequence; The primary side and the secondary side of the second current transformer (3112) are connected to the input end of the three-phase user meter box (312). 6. The electric energy metering training device according to claim 5, characterized in that, the three-phase user meter box (312) comprises: The second terminal box (3122) and the second three-phase four-wire electric energy meter (3121), the first terminal block of the second terminal box (3122) and the primary side of the second current transformer (3112) connected to the secondary side; the second three-phase four-wire watt-hour meter (3121) is connected to the second terminal block of the second terminal box (3122); the first terminal block of the first terminal box (3122) One by one conduction with the second wiring row of the first terminal box (3122). 7. The electric energy metering training device according to claim 4, characterized in that, the three-phase user metering box (321) comprises: The three-phase four-wire straight-through electric energy meter (3211), the second three-phase incoming line switch (3212) and the second three-phase outgoing line switch (3213), the output terminal of the circuit breaker (11), the second three-phase incoming line A line switch (3212), the three-phase four-wire straight-through electric energy meter (3211), the second three-phase outgoing line switch (3213), and the third simulated load (322) are connected in series in sequence.