CN203606483U - Three-phase voltage current simulation power supply used for on-site metering device - Google Patents

Abstract

The utility model relates to a three-phase voltage and current analog power supply for an on-site metering device, which includes an analog power supply device, which includes a high-power rechargeable lithium battery, an output terminal of the high-power rechargeable lithium battery and a three-phase power amplifier power supply, The system auxiliary power supply connection, the three-phase power amplifier power supply is connected to the power supply terminal of the three-phase voltage and current power amplifier, the system auxiliary power supply is connected to the power supply terminal of the three-phase voltage and current signal generator, the three-phase voltage and current power amplifier is connected to the three-phase voltage and current signal generator The output terminal of the generator is connected, the output terminal of the three-phase voltage and current power amplifier is respectively connected with the primary side of the voltage isolation transformer and the current isolation transformer, and the secondary side of the voltage isolation transformer and the current isolation transformer is connected with the three-phase Connect to the input terminal of the voltage and current signal generator. The utility model can facilitate the wiring inspection of the on-site metering device in the no-load state, and is convenient to carry and easy to use and operate.

Description

Three-phase voltage and current analog power supply for on-site metering devices

technical field

The utility model relates to a power supply device, in particular to a three-phase voltage and current analog power supply for on-site metering devices, in particular to a three-phase voltage and current analog power supply for on-site metering devices for wiring inspection.

Background technique

The on-site power metering device plays an important role in the sale of electric energy by the power company. In order to ensure correct electric energy metering, the correctness of the secondary circuit wiring between the transformer and the electric energy meter is very important. Wrong wiring will cause errors in electric energy metering. At the same time, driven by economic interests, electricity theft and illegal use of electricity are becoming more and more serious. In order to ensure the correctness of wiring, regular wiring inspections are required.

The on-site wiring inspection generally uses the electric energy meter field wiring inspection instrument for testing, but due to the limitation of the current test range of the existing electric energy meter field wiring inspection instrument, the secondary circuit wiring inspection of the electric energy metering device must require the user to have a relatively large load during the test process. down to proceed. However, during the on-site inspection, the load is too low or almost no load in many cases, and the wiring inspection cannot be performed.

Contents of the invention

The purpose of the utility model is to overcome the deficiencies in the prior art and provide a three-phase voltage and current analog power supply for on-site metering devices. Easy to operate, safe and reliable.

According to the technical solution provided by the utility model, the on-site metering device uses a three-phase voltage and current analog power supply, including an analog power supply device, and the analog power supply device includes a high-power rechargeable lithium battery, and the output of the high-power rechargeable lithium battery The three-phase power amplifier power supply and the system auxiliary power supply are connected, the three-phase power amplifier power supply is connected to the power supply terminal of the three-phase voltage and current power amplifier, the system auxiliary power supply is connected to the power supply terminal of the three-phase voltage and current signal generator, and the three-phase voltage and current The power amplifier is connected to the output end of the three-phase voltage and current signal generator, the output end of the three-phase voltage and current power amplifier is respectively connected to the primary side of the voltage isolation transformer, the primary side of the current isolation transformer, the secondary side of the voltage isolation transformer and the current The secondary side of the isolation transformer is connected to the input end of the three-phase voltage and current signal generator through the voltage and current phase monitoring meter.

The secondary side of the voltage isolation transformer and the secondary side of the current isolation transformer are connected to the on-site electric energy metering device, and the on-site electric energy metering device includes a voltage transformer, a current transformer and a three-phase electric energy meter; the primary side of the voltage transformer It is connected to the secondary side of the voltage isolation transformer, and the primary side of the current transformer is connected to the secondary side of the current isolation transformer; the secondary side of the voltage transformer and the secondary side of the current transformer are connected to the three-phase electric energy meter.

The utility model has the advantages of large power, small size, easy to carry, and simple on-site use. The three-phase electric energy meter is connected with the voltage isolation transformer through the voltage transformer, and connected with the current isolation transformer through the current transformer, so as to simulate the use load and become the electric energy meter. The on-site wiring checker provides a test environment, so that the possible wiring errors of the electric energy metering device can be found in time, and the economic loss of the power operation can be avoided. The structure is compact, safe and reliable.

Description of drawings

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

Description of reference signs: 1-analog power supply device, 2-high-power rechargeable lithium battery, 3-three-phase power amplifier power supply, 4-system auxiliary power supply, 5-three-phase voltage and current power amplifier, 6-three-phase voltage and current signal Generator, 7-voltage isolation transformer, 8-current isolation transformer, 9-voltage current phase monitoring meter, 10-voltage transformer, 11-current transformer, 12-three-phase electric energy meter and 13-site electric energy metering device.

Detailed ways

Below in conjunction with specific accompanying drawing and embodiment the utility model is further described.

As shown in Figure 1: in order to carry out wiring check conveniently, the utility model comprises analog power supply device 1, and described analog power supply device 1 comprises high-power rechargeable lithium battery 2, the output of described high-power rechargeable lithium battery 2 The terminal is connected with the three-phase power amplifier power supply 3 and the system auxiliary power supply 4, the three-phase power amplifier power supply 3 is connected with the power supply terminal of the three-phase voltage and current power amplifier 5, and the system auxiliary power supply 4 is connected with the power supply terminal of the three-phase voltage and current signal generator 6 connection, the three-phase voltage and current power amplifier 5 is connected to the output end of the three-phase voltage and current signal generator 6, and the output end of the three-phase voltage and current power amplifier 5 is respectively connected to the primary side of the voltage isolation transformer 7 and the primary side of the current isolation transformer 8 Connection, the secondary side of the voltage isolation transformer 7 and the secondary side of the current isolation transformer 8 are connected to the input end of the three-phase voltage and current signal generator 6 through the voltage and current phase monitoring table 9 .

The secondary side of the voltage isolation transformer 7 and the secondary side of the current isolation transformer 8 are connected to the on-site electric energy metering device 13, and the on-site electric energy metering device 13 includes a voltage transformer 10, a current transformer 11 and a three-phase electric energy meter 12 The primary side of voltage transformer 10 is connected with the secondary side of voltage isolation transformer 7, and the primary side of current transformer 11 is connected with the secondary side of current isolation transformer 8; The secondary side of voltage transformer 10, current transformer 11 The secondary side is connected with the three-phase electric energy meter 12.

Specifically, in the embodiment of the present utility model, the high-power rechargeable lithium battery 1 provides working power, which is convenient for on-site use. The high-power rechargeable lithium battery 1 is connected to the three-phase power amplifier power supply 3 and the system auxiliary power supply 4, and the three-phase power amplifier power supply 3 converts the output power of the high-power rechargeable lithium battery 1 to provide work for the three-phase voltage and current power amplifier 5 The required power supply, the system auxiliary power supply 4 provides the power required for the three-phase voltage and current signal generator 6, and the system auxiliary power supply 4 converts the power output by the high-power rechargeable lithium battery 1 into the required power supply such as 5V or 15V , high-power rechargeable lithium battery 2, three-phase power amplifier power supply 3 and system auxiliary power supply 4 can all be obtained through outsourcing.

The three-phase voltage and current signal generator 6 provides six sinusoidal AC signals with a waveform of 50 Hz, and the waveform amplitude can be set between plus and minus 10V; the six signals are respectively defined as UA, UB, UC, IA, IB, IC, voltage The phase difference between the three phases of the waveform is 120°, and the phase between the voltage and the corresponding current can be adjusted between plus and minus 180°.

The three-phase voltage and current signal generator 6 sends the generated voltage and current signals to the three-phase voltage and current power amplifier 5 for amplification processing to improve the output load capacity. The three-phase voltage and current power amplifier 5 outputs the amplified voltage and current signals through the voltage isolation transformer 7 and the current isolation transformer 8 respectively. The three-phase voltage and current phase monitoring meter 9 measures the output voltage and current parameters in real time through the voltage isolation transformer 7 and the current isolation transformer 8, and sends them to the three-phase voltage and current signal generator 6 for signal adjustment closed loop to ensure the output voltage and current. accuracy.

When in use, it is only necessary to connect the three-phase voltage and current sources output by the voltage isolation transformer 7 and the current isolation transformer 8 respectively to the voltage transformer 10 and the current transformer 11 of the on-site electric energy metering device 13 for primary measurement, which is the primary measurement for the entire on-site electric energy metering. The device provides voltage and current signals. Then, the field wiring checker for the electric energy meter is used to test the 12 terminals of the three-phase electric energy meter, so as to check the wiring status of the secondary circuit of the entire field electric energy metering device.

The utility model has large power, small size, is convenient to carry, and is simple to use on site. The three-phase electric energy meter 12 is connected with the voltage isolation transformer 7 through the voltage transformer 10, and connected with the current isolation transformer 8 through the current transformer 11, and simulates the use load. The electric energy meter on-site wiring checker provides a test environment, so that the possible wiring errors of the electric energy metering device 13 can be found in time, and the economic loss of electric power management can be avoided. The structure is compact, safe and reliable.

Claims (2)

1. a situ metrology device three-phase voltage current analog power, it is characterized in that: comprise simulation power supply device (1), described simulation power supply device (1) comprises great-power chargeable lithium battery (2), the output terminal of described great-power chargeable lithium battery (2) and three phase power amplifier power supply (3), system supplymentary power supply (4) connects, three phase power amplifier power supply (3) is connected with the power end of three-phase voltage current power amplifier (5), system supplymentary power supply (4) is connected with the power end of three-phase voltage current signal generator (6), three-phase voltage current power amplifier (5) is connected with the output terminal of three-phase voltage current signal generator (6), the output terminal of three-phase voltage current power amplifier (5) respectively with the primary side of voltage isolating transformer (7), the primary side of electric current isolating transformer (8) connects, the secondary side of the secondary side of voltage isolating transformer (7) and electric current isolating transformer (8) is connected with the input end of three-phase voltage current signal generator (6) by electric current and voltage phase place monitoring form (9).

2. situ metrology device three-phase voltage current analog power according to claim 1, it is characterized in that: the secondary side of described voltage isolating transformer (7), the secondary side of electric current isolating transformer (8) are connected with field electric energy measurement device (13), and described field electric energy measurement device (13) comprises voltage transformer (VT) (10), current transformer (11) and three-phase electric energy meter (12); The primary side of voltage transformer (VT) (10) is connected with the secondary side of voltage isolating transformer (7), and the primary side of current transformer (11) is connected with the secondary side of electric current isolating transformer (8); The secondary side of voltage transformer (VT) (10), the secondary side of current transformer (11) are connected with three-phase electric energy meter (12).

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