CN202870279U - Photovoltaic grid-connected inverter full-load check-up and test system - Google Patents
Photovoltaic grid-connected inverter full-load check-up and test system Download PDFInfo
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- CN202870279U CN202870279U CN 201220489810 CN201220489810U CN202870279U CN 202870279 U CN202870279 U CN 202870279U CN 201220489810 CN201220489810 CN 201220489810 CN 201220489810 U CN201220489810 U CN 201220489810U CN 202870279 U CN202870279 U CN 202870279U
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Abstract
The utility model provides a photovoltaic grid-connected inverter full-load check-up and test system, which relates to the technical field of photovoltaic grid-connected power generation. The photovoltaic grid-connected inverter full-load check-up and test system comprises an AC power distribution cabinet, a three-phase voltage regulator, a three-phase rectifier bridge, a three-phase isolation transformer, a power analyzer and an inverter to be tested, wherein the AC power distribution cabinet provides the electric energy necessary for the test system, the output of the AC power distribution cabinet is connected with a three-phase AC power grid, the three-phase AC electric energy is output to the isolation transformer through the three-phase voltage regulator, the three-phase rectifier bridge and a voltage filter system and then through the inverter to be tested, and then the electric energy reflows to the power grid. The photovoltaic grid-connected inverter full-load check-up and test system effectively realizes the full-power full-load test and check up of the three-phase grid-connected inverter.
Description
Technical field
The utility model relates to the parallel network power generation technical field, relates in particular to a kind of photovoltaic combining inverter full load examination test macro.
Background technology
Designing and developing in the process of photovoltaic combining inverter, before inverter product the final shaping, a necessary step is arranged, exactly the inverter sample is carried out the examination of total power full load, the operation stability of inverter sample when the total power full load is moved with the test design, can the heating situation of inverter critical piece satisfy the requirement of extreme climate, and can the inverter overall operation efficiency meet design requirement and can the inverter output current harmonics meet the demands.
Common way is directly to buy a back-to-back and network source of three-phase in market, one termination three phase network, the input of the tested inverter of intermediate dc termination, the output of the tested inverter of another termination is carried out various tests and full load examination to tested inverter, but also network source is expensive back-to-back for this kind three-phase, especially high-power system, price especially can not be accepted.
Therefore, instantly need a urgent technical matters that solves to be exactly: how can propose a kind of effective measures, to solve problems of the prior art, provide a cover price cheap test macro, effectively realize three-phase grid-connected inverter is carried out the test of total power full load and examination.
The utility model content
Technical problem to be solved in the utility model provides a kind of photovoltaic combining inverter full load examination test macro, effectively realizes three-phase grid-connected inverter is carried out the test of total power full load and examination.
In order to solve the problems of the technologies described above, the utility model provides a kind of photovoltaic combining inverter full load examination test macro, comprise: a three-phase alternating current power distribution cabinet, a three-phase regulator, a three-phase commutation bridge, a three-phase isolation transformer, one cover power analyzer and tested inverter itself, described AC power distribution cabinet/AC distribution panel provides test macro necessary electric energy, its output be connected with the three-phase alternating current electrical network, threephase AC electric energy passes through three-phase regulator, three-phase commutation bridge also is back to electrical network after outputing to isolating transformer behind the tested inverter, described three-phase regulator input 400V line voltage, the three-phase voltage that output AC is adjustable obtains a direct voltage source that DC voltage is adjustable through behind the three-phase commutation bridge, is input to tested inverter, tested inverter output AC electric current is by behind the isolating transformer, and energy is back to electrical network.
Further, described three-phase isolation transformer is Y/ Δ connection.
Further, described three-phase alternating current power distribution cabinet comprises the first isolating switch (T1) that is connected with main electrical network, the 3rd isolating switch (T3) that is connected with three-phase regulator and the second isolating switch (T2) that is connected with three-phase isolation transformer.
Further, described the first isolating switch, the second isolating switch and the 3rd isolating switch all are the closing by hand isolating switch.
Further, described three-phase regulator is input as 400V, and it is adjustable to be output as 0 ~ 690V three-phase alternating voltage.
Further, described three-phase commutation bridge is input as three-phase alternating voltage, is output as DC voltage, and DC voltage is output as 500 ~ 820V.
Further, described tested inverter includes AC and DC side contactor and the 4th isolating switch (T4).
To sum up, the utility model provides a kind of photovoltaic combining inverter full load examination test macro, carry out the total power full load examination test except satisfying photovoltaic combining inverter, the advantage of its maximum is exactly low price, under Same Efficieney, the price of native system only has 1/3 of electrical network simulator back-to-back, and the experimental facilities of greatly having saved in the photovoltaic combining inverter R﹠D process drops into.The zero-sequence current that Y/ Δ connection isolating transformer described in the utility model can effectively stop photovoltaic combining inverter to produce in test process enters network system; Described three-phase regulator output voltage 0 ~ 690V is adjustable, can effectively stop in start-up course to the rush of current of electrical network with to the rush of current of tested inverter bus capacitor; The power that described system consumes is low, generally only has 3 ~ 5% of tested inverter rated power, if test the photovoltaic DC-to-AC converter of a 500KW, the power that test macro consumes only has 15 ~ 25KW, and is very energy-conservation.
Description of drawings
Fig. 1 is the structural representation of photovoltaic combining inverter full load examination test macro of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
The improved photovoltaic combining inverter full load examination test macro that this programme provides, comprise: the AC power distribution cabinet/AC distribution panel of a three-phase, a three-phase regulator, a three-phase commutation bridge, a three-phase isolation transformer, one cover power analyzer and tested inverter itself, wherein said AC power distribution cabinet/AC distribution panel provides test macro necessary electric energy, its output is connected with the three-phase alternating current electrical network, threephase AC electric energy passes through three-phase regulator, output to isolating transformer through behind the tested inverter again after three-phase commutation bridge and the voltage filter system, electric energy is back to electrical network afterwards, described three-phase regulator input 400V line voltage, the three-phase voltage that output AC is adjustable obtains a direct voltage source that voltage is adjustable through behind the three-phase commutation bridge, and through behind electric capacity and the inductor filter, be input to tested inverter, tested inverter output AC electric current is by behind the isolating transformer, and energy is back to electrical network.
Carry out concrete introduction in conjunction with Fig. 1, a kind of photovoltaic combining inverter full load examination test macro in the implementation case, it is used for total power full load examination test photovoltaic combining inverter, and this system comprises: AC power distribution cabinet/AC distribution panel 01, three-phase regulator 02, three-phase commutation bridge 03, tested inverter 04, three-phase isolation transformer 05, power analyzer 06, A.C. contactor 07,08,09, contactor 10.
Three phase network is divided into two-way by the contactor 09 in the AC power distribution cabinet/AC distribution panel 01, and the A.C. contactor 08 of leading up to connects three-phase regulator 02, and another road connects the former limit of three-phase isolation transformer 05 by A.C. contactor 07.In order to prevent test macro to the impact of electrical network, the position of the output voltage of three-phase regulator 02 set to zero Voltage-output when beginning.The input end of three-phase commutation bridge 03 is directly received in the output of three-phase regulator 02, the output dc voltage of three-phase commutation bridge 03 changes according to the input voltage of three-phase regulator 02, the output of three-phase commutation bridge 03 is linked into the direct-flow input end of tested inverter 04 by contactor 10, the ac output end of tested inverter 04 is linked into the Δ secondary of isolating transformer 05, and the former limit of the Y of isolating transformer 05 is by isolating switch 07 access three phase network.Wherein the specified input voltage of three-phase regulator 02 is 400V, it is adjustable to be output as 0 ~ 690V, so that can simulate photovoltaic battery panel 500 ~ 820V direct voltage output in the output of three-phase commutation bridge 03, offer 04 1 adjustable direct voltage sources of input range of photovoltaic DC-to-AC converter by three-phase regulator 02 and three-phase commutation bridge 03, can not simulate the output characteristics of photovoltaic battery panel fully, but the utility model mainly is that inverter is carried out total power full load examination usefulness, can meet the demands fully to a certain extent.Power analyzer 06 just can carry out efficiency analysis and output current harmonics and reactive current analysis to tested inverter 04 by the direct current input current of collection inverter 04 and electric current and the voltage of voltage and ac output end.Three-phase isolation transformer 05 has adopted Y/ Δ connection, and the zero-sequence current that can effectively suppress tested inverter 04 output flow into three phase network.This test macro is in the process that inverter is tested, electric energy is from three-phase regulator 02, three-phase commutation bridge 03, flow into electrical network behind tested inverter 04 and the three-phase isolation transformer 05, electric energy forms circulation in internal system, do not take the three phase network much electricity, whole test macro institute's consuming electric power is also few, is a kind of efficient testing scheme.
Such as Fig. 1, during test, inverter 04 to be measured is linked in the system, the output of three-phase regulator 02 is set as zero, connect isolating switch 07, carry out soft start by 05 pair of tested photovoltaic DC-to-AC converter 04 of three-phase isolation transformer, then connect successively isolating switch 09 and contactor 10, slowly regulate the output voltage of three-phase regulator 02, usually output voltage is transferred to the voltage range that we want, then starts tested inverter 04, slowly promote the setting power of inverter output, until Operation at full power prevents from forming the rush of current to electrical network.This thing is by power analyzer, with regard to operational efficiency and the output harmonic wave electric current of the real-time measurement photovoltaic DC-to-AC converter of energy.By the electric current and voltage that carries and temperature sensor and CPU and the display system of tested inverter 04 itself, we just can observe the temperature of voltage, electric current and each critical piece of inverter, conveniently to carry out real-time monitored.
The utility model provides a kind of test macro that can effectively carry out the test of total power full load and examination to photovoltaic combining inverter, this systemic-function is effective, cheap, can carry out stability assessment to photovoltaic DC-to-AC converter, the examination of heating situation, efficiency test and current harmonics test, and in test, system consumption power is low, has also avoided the zero-sequence current of photovoltaic DC-to-AC converter generation itself to the pollution of electric network source.
More than a kind of photovoltaic combining inverter full load examination test macro provided by the utility model is described in detail, used specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (7)
1. a photovoltaic combining inverter full load is examined test macro, it is characterized in that, comprise: a three-phase alternating current power distribution cabinet, a three-phase regulator, a three-phase commutation bridge, a three-phase isolation transformer, one cover power analyzer and tested inverter itself, described AC power distribution cabinet/AC distribution panel provides test macro necessary electric energy, its output be connected with the three-phase alternating current electrical network, threephase AC electric energy is by three-phase regulator, three-phase commutation bridge also is back to electrical network after outputing to isolating transformer behind the tested inverter, described three-phase regulator input 400V line voltage, the three-phase voltage that output AC is adjustable obtains a direct voltage source that DC voltage is adjustable through behind the three-phase commutation bridge, is input to tested inverter, tested inverter output AC electric current is by behind the isolating transformer, and energy is back to electrical network.
2. photovoltaic combining inverter full load examination test macro according to claim 1 is characterized in that described three-phase isolation transformer is Y/ Δ connection.
3. photovoltaic combining inverter full load according to claim 1 is examined test macro, it is characterized in that, described three-phase alternating current power distribution cabinet comprises the first isolating switch (T1) that is connected with main electrical network, the 3rd isolating switch (T3) that is connected with three-phase regulator and the second isolating switch (T2) that is connected with three-phase isolation transformer.
4. photovoltaic combining inverter full load examination test macro according to claim 3 is characterized in that described the first isolating switch, the second isolating switch and the 3rd isolating switch all are the closing by hand isolating switch.
5. photovoltaic combining inverter full load examination test macro according to claim 1 is characterized in that described three-phase regulator is input as 400V, and it is adjustable to be output as 0 ~ 690V three-phase alternating voltage.
6. photovoltaic combining inverter full load examination test macro according to claim 1 is characterized in that described three-phase commutation bridge is input as three-phase alternating voltage, is output as DC voltage, and DC voltage is output as 500 ~ 820V.
7. photovoltaic combining inverter full load examination test macro according to claim 1 is characterized in that it is characterized in that, described tested inverter includes AC and DC side contactor and the 4th isolating switch (T4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220489810 CN202870279U (en) | 2012-09-21 | 2012-09-21 | Photovoltaic grid-connected inverter full-load check-up and test system |
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| CN 201220489810 CN202870279U (en) | 2012-09-21 | 2012-09-21 | Photovoltaic grid-connected inverter full-load check-up and test system |
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| CN202870279U true CN202870279U (en) | 2013-04-10 |
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| CN 201220489810 Expired - Fee Related CN202870279U (en) | 2012-09-21 | 2012-09-21 | Photovoltaic grid-connected inverter full-load check-up and test system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601562A (en) * | 2019-08-02 | 2019-12-20 | 中国电子科技集团公司第三十八研究所 | Novel power distribution system control device and strategy for rectification power supply and radar |
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2012
- 2012-09-21 CN CN 201220489810 patent/CN202870279U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601562A (en) * | 2019-08-02 | 2019-12-20 | 中国电子科技集团公司第三十八研究所 | Novel power distribution system control device and strategy for rectification power supply and radar |
| CN110601562B (en) * | 2019-08-02 | 2020-11-06 | 中国电子科技集团公司第三十八研究所 | Novel radar power distribution system control method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130410 Termination date: 20190921 |
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| CF01 | Termination of patent right due to non-payment of annual fee |