Device for simulating load power

Abstract

The utility model relates to the technical field of load power regulation, and particularly discloses a device for simulating load power, which comprises an air switch, a three-phase transformer, three single-phase alternating-current ammeters, a potentiometer, a current transformer and a three-phase anti-reflux ammeter, the air switch is connected with the three-phase transformer, the three-phase transformer is connected with the three single-phase alternating-current ammeters, and the three single-phase alternating-current ammeters are connected with the potentiometer. Each single-phase alternating-current electric meter is connected with a potentiometer, and a current transformer collects the current value of the potentiometer and outputs a current signal to the three-phase anti-countercurrent electric meter. According to the utility model, under the condition that the load power change is not obvious, the condition that the load power change is relatively large can be simulated, and the load power variation can be simulated to be adjusted as required, so that the anti-reflux and demand protection function test of a new energy storage product becomes more convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to load power regulation technical field, specifically a device of simulating load power. BACKGROUND

[0002] Load power refers to the power that electrical equipment actually consumes or needs to use in the working process, and it is an important index for measuring the consumed electric energy of electrical appliances or equipment in the running process. The calculation method of load power depends on the characteristics of the circuit and the accuracy of the measurement.

[0003] In a direct current circuit, load power can be calculated by a simple formula: load power = voltage x current. This formula is applicable to the calculation of load power of simple direct current circuits such as direct current resistance and direct current motor. In an alternating current circuit, due to the instability of the voltage and current waveforms, the phase difference, power factor and effective value of voltage and current need to be considered. In active power calculation, the following formula is used: active power = voltage x current x power factor. The power factor is a quantity representing the proportional relationship between active power and apparent power, with a value range of -1 to 1, used to describe the relationship between useful power and useless power (such as reactive power, apparent power) in the circuit.

[0004] With the rapid development of the energy storage industry, new products in the energy storage industry are constantly emerging in the research and development, and various functions and performance tests will be carried out in the sample stage. The anti-inrush function and demand protection function of the energy storage system are two test items in the function test of the energy storage system, but due to the difficulty in adjusting the load power in the factory, the two function tests of the anti-inrush function and the demand protection function are difficult to carry out. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a device of simulating load power to solve the problem of difficulty in adjusting load power in the factory, which leads to the difficulty in carrying out the two function tests of anti-inrush function and demand protection function.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A device of simulating load power, comprising an air switch, a three-phase transformer, a single-phase AC ammeter, a potentiometer and a three-phase anti-inrush ammeter, the air switch is connected with the three-phase transformer, the three-phase transformer is connected with three single-phase AC ammeters, each single-phase AC ammeter is connected with the potentiometer, and the potentiometer is connected with the three-phase anti-inrush ammeter.

[0008] As a further scheme of the utility model, the number of potentiometers is three.

[0009] As a further scheme of the utility model: the three-phase transformer is used for converting 220V alternating current into 380V alternating current.

[0010] The single-phase alternating current meter is used for displaying single-phase voltage, current and power of the three-phase transformer.

[0011] The potentiometer is used for adjusting the current and power of the three-phase A, B and C, and provides adjustable input current for the three-phase reverse current prevention meter.

[0012] As a further scheme of the utility model: the input current value of the three-phase reverse current prevention meter is 0-5A.

[0013] As a further scheme of the utility model: the three-phase lines of the three-phase transformer are connected with the three single-phase alternating current meters respectively, the phase line and neutral line of the single-phase alternating current meter are connected with the potentiometer, and the current transformer is used for collecting the current value of the potentiometer and outputting the current signal to the three-phase reverse current prevention meter.

[0014] As a further scheme of the utility model: the three-phase reverse current prevention meter has S1*, S1, S2*, S2, S3* and S3 connection terminals, the current transformer is used for collecting the current value of the potentiometer and outputting the current signal, and the S1 and S2 of the three current transformers are connected with the S1*, S1, S2*, S2, S3* and S3 connection terminals of the three-phase reverse current prevention meter respectively.

[0015] As a further scheme of the utility model: the three-phase reverse current prevention meter is provided with a communication line, the communication line is a 485 communication line, and the communication line is used for connecting the reverse current prevention communication interface of the energy storage system.

[0016] As a further scheme of the utility model, the use method of the device for simulating load power is as follows: first, 220V commercial power is led out to the upper end of the air switch, then the lower end of the air switch is led out to the three-phase transformer, then the ABC three-phase of the three-phase transformer is led out to the single-phase alternating current meter, then the L line and N line of the three single-phase alternating current meters are led out to the three potentiometers respectively, then the three current transformers are connected with the phase line of the potentiometer, finally, the S1 and S2 of the three current transformers are connected with the S1*, S1, S2*, S2, S3* and S3 connection terminals of the three-phase reverse current prevention meter respectively, and finally, the 485 communication line of the three-phase reverse current prevention meter is led out to the reverse current prevention communication interface of the energy storage system.

[0017] Compared with the prior art, the utility model discloses the beneficial effects are: the utility model discloses through setting air switch, three -phase transformer, single -phase ac ammeter, potentiometre and three -phase anti -reverse -flow electric meter, air switch is connected with three -phase transformer, three -phase transformer connects three single -phase ac ammeter, and every single -phase ac ammeter is connected with the potentiometre of having, and current transformer gathers potentiometre current signal and is connected with three -phase anti -reverse -flow electric meter, thereby in the case where load power change is not obvious, simulate load power change bigger condition, simulate and realize the load power change amount of adjusting demand, make new energy storage product's anti -reverse -flow and demand protection function test become more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the structural schematic diagram of the device for simulating load power.

[0019] Figure 2 It is the structural schematic diagram of the device for simulating load power.

[0020] Figure 3 It is the partial enlarged schematic view of the device for simulating load power. Figure 2

[0021] In the drawing: 10-air switch, 20-three -phase transformer, 30-single -phase ac ammeter, 40-potentiometre, 50-three -phase anti -reverse -flow electric meter, 60-communication line, 70-insurance, 80-current transformer. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the range of protection of the utility model.

[0023] With the rapid development of energy storage industry, new products of energy storage industry are born in continuous research and development, and various function and performance tests will be carried out in the sample stage, wherein the anti -reverse -flow function and demand protection function of energy storage system are two test items in the function test of energy storage system, but in the factory, the load power adjustment is difficult, thereby leading to the difficulty of carrying out the two function tests of anti -reverse -flow function and demand protection function.

[0024] Based on this, please refer to Figures 1-3 ​The utility model discloses an embodiment of a kind of simulated load power's device, including air switch 10, three-phase transformer 20, single-phase AC meter 30, potentiometer 40, three-phase anti-reverse current meter 50, fuse (70) and current transformer (80), the air switch 10 is connected with the three-phase transformer 20, the three-phase transformer 20 connects three the single-phase AC meter 30, each single-phase AC meter 30 is connected with the potentiometer 40, namely, in the embodiment, the quantity of potentiometer 40 is three, the potentiometer 40 is connected with three-phase anti-reverse current meter 50, wherein:

[0025] Three-phase transformer 20 is used to convert 220V AC (AC220V) into 380V AC (AC380V);

[0026] Single-phase AC meter 30 is used to display single-phase voltage, current and power of three-phase transformer 20, that is, three single-phase AC meters 30 display voltage, current and power of A, B and C three-phase of three-phase transformer 20 respectively.

[0027] Potentiometer 40 is used to adjust current and power size of A, B and C three-phase, and provide adjustable input current for three-phase anti-reverse current meter 50.

[0028] Further, in the embodiment of the application, the three-phase line of the three-phase transformer 20 is connected with the three single-phase AC meters 30 respectively, and the phase line (L line) and neutral line (N line) of the single-phase AC meter 30 are connected with the potentiometer 40; the current transformer 80 is connected with the three-phase anti-reverse current meter 50, specifically, in the embodiment, the three-phase anti-reverse current meter 50 has S1*, S1, S2*, S2, S3* and S3 terminals, and the current transformer 80 has S1 and S2 terminals, and the S1 and S2 terminals of the three current transformers 80 are connected with the S1*, S1, S2*, S2, S3* and S3 terminals of the three-phase anti-reverse current meter 50 respectively, and it can be understood that by adjusting the potentiometer 40 on the three-phase line, the output current can be adjusted, the three-phase load current change is simulated, so that the S and S* current change is detected by the three-phase anti-reverse current meter, thereby simulating the three-phase load power change.

[0029] Further, in the embodiment of the application, the three-phase anti-reverse current meter 50 is provided with a communication line 60, the communication line 60 is a 485 communication line, and the communication line 60 is used to connect the anti-reverse current communication interface of the energy storage system.

[0030] The device for simulating load power in the embodiment is used in the following way: first, 220V mains is led out to the upper end of the air switch 10, then the lower end of the air switch 10 is led out to the three-phase transformer 20, then the ABC three-phase of the three-phase transformer 20 is led out to the single-phase AC meter 30, then the three single-phase AC meters 30 are respectively led out to the L line and the N line to the three potentiometers 40, then the S1 and S2 of the three current transformers are connected to the S1*, S1, S2*, S2, S3*, S3 terminal of the three-phase anti-reverse current meter 50, and finally the 485 communication line 60 of the three-phase anti-reverse current meter 50 is led out to the energy storage system anti-reverse current communication interface.

[0031] In summary, the utility model discloses the air switch, three-phase transformer, single-phase AC meter, potentiometer and three-phase anti-reverse current meter are set up, the air switch is connected with three-phase transformer, three-phase transformer connects three single-phase AC meters, and each single-phase AC meter is connected with the potentiometer, and the current transformer collects the current value of the potentiometer, and the current transformer is connected with the three-phase anti-reverse current meter, thereby in the case where load power change is not obvious, the load power change of the simulation is simulated to be larger, the load power change is adjusted according to demand, and the anti-reverse current and demand protection function test of new energy storage product become more convenient.

[0032] For those skilled in the art, it is obvious that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0033] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can be combined to form other embodiments that those skilled in the art can understand.

Claims

1. An apparatus for simulating load power, characterized by, The utility model relates to an air switch (10), three-phase transformer (20), single-phase AC meter (30), potentiometer (40), three-phase anti-reverse current meter (50), communication line (60), fuse (70) and current transformer (80), the air switch (10) is connected with the three-phase transformer (20), the three-phase transformer (20) is connected three single-phase AC meters (30), each single-phase AC meter (30) is connected with fuse (70) and potentiometer (40), and current transformer (80) is used to gather the current signal of potentiometer (40) and transmit to three-phase anti-reverse current meter (50).

2. The apparatus for simulating load power of claim 1, wherein, The number of the potentiometer (40) is three.

3. The apparatus for emulating a load power of claim 1, wherein, The three-phase transformer (20) is used to convert 220V AC into 380V AC. The single-phase AC meter (30) is used to display the single-phase voltage, current and power of the three-phase transformer (20). The potentiometer (40) is used to adjust the current and power of three-phase A, B and C, and provide adjustable input current for the three-phase anti-reverse current meter (50).

4. The apparatus for simulating load power of claim 3, wherein, The input current value of the three-phase anti-reverse current meter (50) is 0-5A.

5. The apparatus for simulating a load power of claim 1, wherein, The three-phase lines of the three-phase transformer (20) are connected with three single-phase AC meters (30) respectively, the phase line and neutral line of the single-phase AC meter (30) are connected with the potentiometer (40), and the current transformer (80) collects the current change value of the potentiometer and outputs the current signal to the three-phase anti-reverse current meter (50).

6. The apparatus for simulating a load power of claim 5, wherein, The three-phase anti-reverse current meter (50) has S1*, S1, S2*, S2, S3* and S3 terminals, the current transformer (80) has S1 and S2 terminals, and the S1 and S2 terminals of three current transformers (80) are connected with the S1*, S1, S2*, S2, S3* and S3 terminals of the three-phase anti-reverse current meter (50) respectively.

7. The apparatus for simulating a load power of claim 6, wherein, The three-phase anti-reverse current meter (50) is provided with a communication line (60), the communication line (60) is a (485) communication line, and the communication line (60) is used to connect the anti-reverse current communication interface of the energy storage system.

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