CN202563028U

CN202563028U - Full-load test device of power unit

Info

Publication number: CN202563028U
Application number: CN2012202244986U
Authority: CN
Inventors: 冯芬; 刘峙飞; 李长龙; 张卡飞; 娄益丰
Original assignee: WOLONG ELECTRICAL GROUP HANGZHOU RESEARCH INSTITUTE Co Ltd; Wolong Electric Group Co Ltd
Current assignee: WOLONG ELECTRICAL GROUP HANGZHOU RESEARCH INSTITUTE Co Ltd; Wolong Electric Drive Group Co Ltd
Priority date: 2012-05-18
Filing date: 2012-05-18
Publication date: 2012-11-28
Anticipated expiration: 2022-05-18

Abstract

A power unit full-load test device relates to a power unit test device. At present, the full-load test of the power unit requires a large front-end power supply capacity, large energy consumption, and a large area occupied by the power resistor. The utility model includes a tested power unit, a test power unit, an inverter, a reactor, a first isolation transformer, a second isolation transformer, a voltage regulator and an incoming line switch. The power supply passes through the incoming line switch, the voltage regulator, the second The second isolation transformer is input to the test power unit, the DC busbar of the test power unit is connected to the input of the inverter, the three-phase output of the inverter is input to the power unit under test through the first isolation transformer, and the power unit under test is connected to the test Connect a reactor between the outputs of the power unit as a load. The technical scheme can realize full-load output, and the test accuracy is high. The output power of the tested power unit is re-inputted to the tested power unit through the test power unit, inverter and isolation transformer, so as to realize energy circulation and low energy consumption.

Description

A kind of power cell full-load test device

Technical field

The utility model relates to a kind of power cell test unit.

Background technology

Along with the development of Power Electronic Technique, the mesohigh frequency converter has obtained using widely and development, and wherein power unit cascade type mesohigh frequency converter becomes main product both domestic and external in recent years with the advantage of its each side.Power cell is the Power Exchange part, is the core of mesohigh frequency converter, also is that loss mainly produces part.The loss value of different load high or low power unit is different, thereby temperature rise is also different, so the data acquisition of the power cell thermal design of science and checking must be carried out on the fully loaded basis of power cell.The producer's neither one power cell full-load test platform that has, blindly carry out fansink designs, power cell that designs like this or fansink designs are excessive or have overheated problem.What the producer that also has was set up is traditional power cell full-load test mode; Traditional power cell full-load test mode is that power cell output directly connects powerful resistance; Output power consumes by power resistor fully, and it is very big that the drawback of the method is that power resistor takes up an area of, and requires the front end power supply capacity big; And output power consumes in vain, and energy consumption is big.

The utility model content

The technical matters that the utility model will solve and the technical assignment of proposition are that the prior art scheme is improved and improved, and a kind of power cell full-load test device is provided, and be high to reach the test accuracy, the purpose that energy consumption is little.For this reason, the utility model is taked following technical scheme.

A kind of power cell full-load test device comprises by test power cell, test with power cell, inverter, reactor, first isolating transformer, second isolating transformer, pressure regulator and service entrance switch; Power supply is input to test through service entrance switch, pressure regulator, second isolating transformer and uses power cell; Test links to each other with the inverter input with the DC master row of power cell; The output of the three-phase of inverter is input to the measured power unit through first isolating transformer, is connected reactor as load between measured power unit and the output of testing with power cell.

As the further of technique scheme improved and replenish, the utility model also comprises following additional technical feature.

Described inverter is a three-phase H bridge inverter structure.Or described inverter is DC/AC commutation inversion structure, and its dc bus links to each other with power cell with test, and three-phase is exported and linked to each other with isolating transformer.

Second isolating transformer is the isolation boosting transformer.

Beneficial effect: the present technique scheme is through output voltage and the phase angle of adjustment test with power cell; Thereby the size and the direction vector of control measured power unit output voltage and electric current; Make by the power factor (PF) of test power cell output power and approach 1; Can realize fully loaded output, the test accuracy is high.Re-entered by the test power cell with power cell, inverter and isolating transformer through test by the output power of test power cell, realize energy circulation, system only need provide a spot of loss, and energy consumption is low.

Description of drawings

Fig. 1 is the utility model electrical structure schematic diagram.

The Q1-service entrance switch, the T3-pressure regulator, T1-first isolating transformer, T2-second isolating transformer, U1-measured power unit, the U2-test is used power cell, U3-inverter, L1-reactor.

Embodiment

Below in conjunction with Figure of description the technical scheme of the utility model is done further detailed description.

As shown in Figure 1; The utility model comprises by test power cell U1, test with power cell U2, inverter U3, reactor L1, the first isolating transformer T1, the second isolating transformer T2, pressure regulator T3 and service entrance switch Q1; Power supply is input to test through service entrance switch Q1, pressure regulator T3, the second isolating transformer T2 and uses power cell U2; Test links to each other with inverter U3 input with the DC master row of power cell U2; The output of the three-phase of inverter U3 is input to measured power unit U1 through the first isolating transformer T1, is connected reactor L1 as load between measured power unit U1 and the output of testing with power cell U2.Wherein inverter U3 is a three-phase H bridge inverter structure; Inverter U3 also can be DC/AC commutation inversion structure, and its dc bus links to each other with power cell U2 with test, and three-phase output links to each other with isolating transformer.The second isolating transformer T2 is the isolation boosting transformer.

At the trial; Closed service entrance switch Q1, through output voltage and the phase angle of control test with power cell U2, thus the size and the direction vector of control measured power unit U1 output voltage and electric current; Make by the power factor (PF) of test power cell output power and approach 1, realize fully loaded output.Re-entered by the test power cell with power cell U2, inverter U3 and isolating transformer through test by the output power of test power cell, realize energy circulation.

More than a kind of power cell full-load test device shown in Figure 1 be the specific embodiment of the utility model; The utility model substantive distinguishing features and progress have been embodied; Can be according to the use needs of reality; Under the enlightenment of the utility model, it is carried out the equivalent modifications of aspects such as shape, structure, all at the row of the protection domain of this programme.

Claims

1. A power unit full-load test device, characterized in that it includes a tested power unit (U1), a test power unit (U2), an inverter (U3), a reactor (L1), and a first isolation transformer ( T1), the second isolation transformer (T2), the voltage regulator (T3) and the incoming switch (Q1), the power is input to the The test power unit (U2), the DC busbar of the test power unit (U2) is connected to the input of the inverter (U3), and the three-phase output of the inverter (U3) is input to the The power unit under test (U1), the reactor (L1) is connected between the output of the power unit under test (U1) and the test power unit (U2) as a load.

2. A power unit full-load test device according to claim 1, characterized in that: said inverter (U3) is a three-phase H-bridge inverter structure.

3. A power unit full-load test device according to claim 1, characterized in that: the inverter (U3) is a DC/AC rectification and inverter structure, and its DC bus and the test power unit (U2) The three-phase output is connected to the isolation transformer.

4. A power unit full-load test device according to claim 1, characterized in that: the second isolation transformer (T2) is an isolation step-up transformer.