CN203299286U - Photovoltaic grid-connected inverter detection platform - Google Patents
Photovoltaic grid-connected inverter detection platform Download PDFInfo
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- CN203299286U CN203299286U CN2013202017582U CN201320201758U CN203299286U CN 203299286 U CN203299286 U CN 203299286U CN 2013202017582 U CN2013202017582 U CN 2013202017582U CN 201320201758 U CN201320201758 U CN 201320201758U CN 203299286 U CN203299286 U CN 203299286U
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Abstract
The utility model discloses a photovoltaic grid-connected inverter detection platform, comprising a primary system for work environment simulation of an inverter, a secondary system for recording the test data of the primary system and for extraction and analysis, and an industrial control computer for control, data access and analysis of the secondary system. The photovoltaic grid-connected inverter detection platform is advantageous in that functions are improved, equipment configuration is reasonable, operation is convenient, measure precision is high, the automation degree is high, etc., and important meaning is provided for guaranteeing safety of public electrical network household electric use.
Description
Technical field
The utility model relates to a kind of pick-up unit, especially a kind of photovoltaic combining inverter detection platform.
Background technology
Sun power is the eternal energy of the earth,, along with the appearance of development in science and technology and energy crisis, utilizes the distributed energy resource system of sun power to receive increasing concern.The nice ideal of " sunlight is electric everywhere everywhere " is accompanied by at last people and realizes for the pursuit of green energy resource.Solar energy power generating utilizes semi-conductive photovoltaic effect that solar radiant energy is directly changed into electric energy.Now, the mainstream applications mode of world's photovoltaic generating system is the parallel network power generation mode, be that photovoltaic system is connected with local electrical network by combining inverter, by electrical network, the photovoltaic system electricity can be reallocated, as supplying local load or carrying out power peak regulation etc.Photovoltaic parallel in system is comprised of three parts usually: photovoltaic array, photovoltaic combining inverter and connecting system part.
Parallel network power generation is the development trend that sun power utilizes, and except large-sized photovoltaic is incorporated into the power networks power station, photovoltaic generating system is used for peak load stations and roof pv grid-connected plant more and more.Photovoltaic DC-to-AC converter is the core component in grid-connected photovoltaic system.Because photovoltaic generating system need to access electrical network, for guaranteeing utility network and user's safety, photovoltaic parallel in system should possess perfect safeguard measure.Only stipulate at present the requirement for defencive function in national standard, do not formulated corresponding test procedure detailed rules and regulations and step.Therefore, be necessary further to study method of testing and the Testing Platform of photovoltaic parallel in system, guarantee reliability and the accuracy of test result.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of perfect in shape and function, the equipment configuration is reasonable, easy to operate, measuring accuracy is high and the high photovoltaic combining inverter detection platform of automaticity.
In order to solve the problems of the technologies described above, the utility model comprises for the primary system of simulation inverter working environment, be used for recording the electrical secondary system of described primary system test figure and extraction and analysis and be used for to described primary system and described electrical secondary system control, data read and the industrial computer analyzed
Described primary system comprises
The emulation direct supply,, for the output characteristics of analog DC distributed power source, input near the electric energy of truth to one of described inverter simulation,
The emulation AC power, be used for the simulating grid characteristic, according to test event, requires difference, to described inverter, provides different AC electrical network characteristics,
Fictitious load, be used for simulating different load characteristics, to check the permanent characteristic of described inverter,
The fault control cabinet, be used at short circuit electric energy environment of described inverter output end simulation,
The simulated impedance network A, be used for simulating the line characteristic between described inverter and described fictitious load,
The simulated impedance network B, be used for simulating the line characteristic between described fictitious load and described emulation AC power;
Described electrical secondary system comprises
Power analyzer, for detection of the electrical specification of described inverter,
Power quality analyzer, for detection of the quality of power supply at described inverter access point place,
Datalogger, for detection of d. c. voltage signal, the current signal between described emulation direct supply and described inverter, ac voltage signal, current signal for detection of described inverter output end, for detection of ac voltage signal, current signal and the frequency signal of described emulation ac power output, described datalogger records and stores above-mentioned measuring-signal.
Described emulation direct supply comprises DC analog power 1 and DC analog power 2, described DC analog power 1 and DC analog power 2 be by a described primary system of direct current switching gate cabinet access, the selection by described dc switch gating cabinet can realize described DC analog power 1 and described DC analog power 2 one of them or simultaneously and described primary system access or disconnect.
Described emulation AC power comprises the AC analog power 2 of the jumbo AC analog power 1 of high precision and low precision low capacity, described AC analog power 1 and AC analog power 2 be by a described primary system of alternating-current switch gating cabinet access, the selection by described alternating-current switch gating cabinet can realize described AC analog power 1 and described AC analog power 2 one of them or simultaneously and described primary system access or disconnect.
Described fictitious load is the three-phase simulation load that three phase power is independently controlled.
The beneficial effects of the utility model: the utlity model has that the configuration of perfect in shape and function, equipment is reasonable, easy to operate, measuring accuracy is high and the automaticity advantages of higher, significant for the safety that guarantees utility network and user.And the test procedure of this detection platform arranges rationally, and conclusion (of pressure testing) is accurate, and reliability is high.Each two of emulation direct supply, emulation AC power have been equipped with in the utility model, increased the inverter range of capacity to be measured of detection platform, and introduced dc switch gating cabinet and alternating-current switch gating cabinet, and working power is selected, increased dirigibility and the ease for use of system.
Description of drawings
Fig. 1 is the system chart of the utility model photovoltaic combining inverter detection platform.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
referring to Fig. 1, photovoltaic combining inverter detection platform of the present utility model comprises the primary system for simulation inverter working environment, be used for recording the electrical secondary system of described primary system test figure and extraction and analysis and be used for described primary system and described electrical secondary system are controlled, the industrial computer (not shown) that data read and analyze, described primary system comprises, the emulation direct supply, the emulation AC power, fictitious load, the fault control cabinet, simulated impedance network A and simulated impedance network B, described electrical secondary system comprises power analyzer, power quality analyzer and datalogger.
The emulation direct supply is used for the output characteristics of analog DC distributed power source, input near the electric energy of truth to one of described inverter simulation, described emulation direct supply comprises DC analog power 1 and DC analog power 2, described DC analog power 1 and DC analog power 2 be by a described primary system of direct current switching gate cabinet access, the selection by described dc switch gating cabinet can realize described DC analog power 1 and described DC analog power 2 one of them or simultaneously and described primary system access or disconnect.The emulation direct supply is mainly used to the output characteristics of analog DC distributed power source (such as solar electrical energy generation, fuel cell, accumulator etc.), comprise the impact of the environmental factors such as simulation weather, temperature, the control characteristic of simulating various distributed power sources, response time etc., thereby to one of inverter simulation, input near the direct current energy of truth.The emulation direct supply has function generator, has constant voltage, crossing current, constant power output function, has open programmability.Control voltage able to programme, electric current, power, internal resistance etc., can be used as the time, and perhaps each other arbitrary function relation is exported.High stable state accuracy, high dynamic response, be convenient to carry out the dynamic output characteristic simulation of the direct current distributed power sources such as photovoltaic cell, fuel cell, rectification blower fan.Its defencive function comprises overcurrent, overvoltage, overload, short circuit and reverse protection function.Due to the User Defined mode that output characteristic curve is provided, the all right true output of analog DC distributed power source under the environment such as different weather, temperature of direct supply, in addition, under constant voltage mode, maximum output current can be set, under the pattern of constant current, minimum output current can be set, voltage and current can the desired setting value of independent assortment under rated power.Waveform under various running statuses can be checked.
The emulation AC power is used for the simulating grid characteristic, require different according to test event, provide different AC electrical network characteristics to described inverter, described emulation AC power comprises the AC analog power 2 of the jumbo AC analog power 1 of high precision and low precision low capacity, described AC analog power 1 and AC analog power 2 be by a described primary system of alternating-current switch gating cabinet access, the selection by described alternating-current switch gating cabinet can realize described AC analog power 1 and described AC analog power 2 one of them or simultaneously and described primary system access or disconnect.When carrying out the system connecting test, require differently according to test event, need to regulate AC electrical network characteristic, therefore tested inverter can not be directly connected in actual electric network, need can the simulating grid characteristic the test AC power.The emulation AC power is one of most important equipment in platform, and its performance has decisive role to the result of test event, therefore but this emulation AC power quick adjustment voltage, electric current, power have and can bear the opposite tide function; Can single-phase, three-phase operation; Can expand capacity; Has programmable function.
Fictitious load can be simulated different load characteristics; permanent characteristic with the check inverter; and can be by adjusting the output power of load matched inverter, then disconnect and being connected of emulation AC power the anti-island protect performance of detection inverter by alternating-current switch gating cabinet.For the isolated island effect prevention protection test, overload protection test, overcurrent protection test, power factor determination test, the work efficiency that meet combining inverter are measured the needs such as test, grid-connected current harmonic test.The three-phase simulation load three phase power of platform selecting is independently controlled; can combination in any simulate various power loads; the accurate analog AC consumer generation resonance of load in addition; during imbalance of three-phase voltage; also can go out each phase resonance point by fast debugging, detect the anti-island protect function of combining inverter and work efficiency, power supply performance.
The fault control cabinet, be used at short circuit electric energy environment of described inverter output end simulation.
The simulated impedance network A, be used for simulating the line characteristic between described inverter and described fictitious load; The simulated impedance network B, be used for simulating the line characteristic between described fictitious load and described emulation AC power; Chase after from projects such as test, the test of running power factor, the tests of voltage rising inhibit feature if inverter will carry out alternating voltage, need the electric energy environment of inverter port near true electrical network.Be zero because the output impedance of emulation AC power is close to, so the output termination of emulation AC power must the connecting analog impedance network, can carry out above-mentioned test.Therefore, this platform configuration the simulated impedance network, be used for analog line, thereby can carry out accurate Simulation and analysis to the impact of distributed power source connecting system, comprise to false voltage short circuit current level, trend, the system side quality of power supply etc.
Power analyzer, for detection of the electrical specification of described inverter.Power analyzer is used for measuring the voltage that exchanges the access point place, electric current, frequency, harmonic wave, power, power factor, the Voltage unbalance degree, DC component, and the voltage of convertor equipment DC side, electric current, power, the parameters such as ripple factor, its input quantity have the voltage and current of DC side, three-phase voltage and the electric current of AC, each group voltage, current signal are calculated 1 tunnel input, amount to 4 road analog inputs.
Power quality analyzer, for detection of the quality of power supply at described inverter access point place.Power quality analyzer can measuring voltage and effective value, frequency, power, power consumption (electric weight), degree of unbalancedness and the flickering etc. of electric current.The power quality analyzer that platform is selected according to function except having above-mentioned functions, also has the functions such as fault detect, data acquisition.Have extraneous communication interface and external operation display unit, can carry out remote monitoring and communication simultaneously, harmonic measure to 63, can detect tri-phase unbalance factor, transient peak pulse signal, surge current.
Datalogger, for detection of d. c. voltage signal, the current signal between described emulation direct supply and described inverter, ac voltage signal, current signal for detection of described inverter output end, for detection of ac voltage signal, current signal and the frequency signal of described emulation ac power output, described datalogger records and stores above-mentioned measuring-signal.Datalogger is used for recording analog quantity and the switching value from each equipment input, be mainly used in the simulation test of the performance test of distributed power source grid-connection device and direct current distributed power source etc., according to the platform feature requirement, can record the measurement result of obtaining from sensor, and these result stores are got up.
In the utility model, DC side and AC are equipped with respectively two analog powers, thereby have improved the extensibility of system, and, to the applicability of different parameters inverter, have expanded power system capacity, thereby increased the ease for use of test platform.
In sum, content of the present utility model is not limited in the above-described embodiment, and those skilled in the art can propose other embodiment within technological guidance's thought of the present utility model, but within these embodiment are included in scope of the present utility model.
Claims (4)
1. photovoltaic combining inverter detection platform, it is characterized in that: comprise primary system for simulation inverter working environment, be used for recording the electrical secondary system of described primary system test figure and extraction and analysis and be used for to described primary system and described electrical secondary system control, data read and the industrial computer analyzed
Described primary system comprises
The emulation direct supply,, for the output characteristics of analog DC distributed power source, input near the electric energy of truth to one of described inverter simulation,
The emulation AC power, be used for the simulating grid characteristic, according to test event, requires difference, to described inverter, provides different AC electrical network characteristics,
Fictitious load, be used for simulating different load characteristics, to check the permanent characteristic of described inverter,
The fault control cabinet, be used at short circuit electric energy environment of described inverter output end simulation,
The simulated impedance network A, be used for simulating the line characteristic between described inverter and described fictitious load,
The simulated impedance network B, be used for simulating the line characteristic between described fictitious load and described emulation AC power;
Described electrical secondary system comprises
Power analyzer, for detection of the electrical specification of described inverter,
Power quality analyzer, for detection of the quality of power supply at described inverter access point place,
Datalogger, for detection of d. c. voltage signal, the current signal between described emulation direct supply and described inverter, ac voltage signal, current signal for detection of described inverter output end, for detection of ac voltage signal, current signal and the frequency signal of described emulation ac power output, described datalogger records and stores above-mentioned measuring-signal.
2. according to photovoltaic combining inverter detection platform claimed in claim 1, it is characterized in that: described emulation direct supply comprises DC analog power 1 and DC analog power 2, described DC analog power 1 and DC analog power 2 be by a described primary system of direct current switching gate cabinet access, the selection by described dc switch gating cabinet can realize described DC analog power 1 and described DC analog power 2 one of them or simultaneously and described primary system access or disconnect.
3. according to photovoltaic combining inverter detection platform claimed in claim 2, it is characterized in that: described emulation AC power comprises the AC analog power 2 of the jumbo AC analog power 1 of high precision and low precision low capacity, described AC analog power 1 and AC analog power 2 be by a described primary system of alternating-current switch gating cabinet access, the selection by described alternating-current switch gating cabinet can realize described AC analog power 1 and described AC analog power 2 one of them or simultaneously and described primary system access or disconnect.
4., according to photovoltaic combining inverter detection platform claimed in claim 3, it is characterized in that: described fictitious load is the three-phase simulation load that three phase power is independently controlled.
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| CN2013202017582U CN203299286U (en) | 2013-04-19 | 2013-04-19 | Photovoltaic grid-connected inverter detection platform |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103777097A (en) * | 2014-01-21 | 2014-05-07 | 国家电网公司 | Testing platform and method generally used for whole process of low voltage user side distributed power source grid connection |
| CN104316763A (en) * | 2014-11-18 | 2015-01-28 | 威海广泰空港设备股份有限公司 | System and method for detecting current harmonics of photovoltaic inverter |
| CN104950207A (en) * | 2014-03-25 | 2015-09-30 | 艾默生网络能源有限公司 | Short circuit detecting method and device for photovoltaic inverter |
| CN106814265A (en) * | 2015-11-27 | 2017-06-09 | 中国电力科学研究院 | A kind of photovoltaic DC-to-AC converter generating efficiency test system |
| CN106872818A (en) * | 2016-12-29 | 2017-06-20 | 中国电力科学研究院 | The grid-connected Performance Test System and method of a kind of smooth storing cogeneration device |
| CN108459226A (en) * | 2018-04-24 | 2018-08-28 | 合肥市艾特米信息技术有限公司 | Photovoltaic DC-to-AC converter automatization test system |
| CN110940851A (en) * | 2019-11-18 | 2020-03-31 | 中电科仪器仪表(安徽)有限公司 | Power detection device and method for modular programmable photovoltaic system |
| CN112526264A (en) * | 2020-11-26 | 2021-03-19 | 苏州市万松电气有限公司 | Single-phase inverter detection system |
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2013
- 2013-04-19 CN CN2013202017582U patent/CN203299286U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103777097A (en) * | 2014-01-21 | 2014-05-07 | 国家电网公司 | Testing platform and method generally used for whole process of low voltage user side distributed power source grid connection |
| CN104950207A (en) * | 2014-03-25 | 2015-09-30 | 艾默生网络能源有限公司 | Short circuit detecting method and device for photovoltaic inverter |
| CN104950207B (en) * | 2014-03-25 | 2017-08-29 | 艾默生网络能源有限公司 | The method for detecting short circuit and device of a kind of photovoltaic DC-to-AC converter |
| CN104316763A (en) * | 2014-11-18 | 2015-01-28 | 威海广泰空港设备股份有限公司 | System and method for detecting current harmonics of photovoltaic inverter |
| CN104316763B (en) * | 2014-11-18 | 2018-04-10 | 威海广泰空港设备股份有限公司 | A kind of photovoltaic DC-to-AC converter current harmonic detection system and method |
| CN106814265A (en) * | 2015-11-27 | 2017-06-09 | 中国电力科学研究院 | A kind of photovoltaic DC-to-AC converter generating efficiency test system |
| CN106872818A (en) * | 2016-12-29 | 2017-06-20 | 中国电力科学研究院 | The grid-connected Performance Test System and method of a kind of smooth storing cogeneration device |
| CN106872818B (en) * | 2016-12-29 | 2022-06-07 | 中国电力科学研究院 | Grid-connected performance testing system and method for light storage combined power generation device |
| CN108459226A (en) * | 2018-04-24 | 2018-08-28 | 合肥市艾特米信息技术有限公司 | Photovoltaic DC-to-AC converter automatization test system |
| CN110940851A (en) * | 2019-11-18 | 2020-03-31 | 中电科仪器仪表(安徽)有限公司 | Power detection device and method for modular programmable photovoltaic system |
| CN112526264A (en) * | 2020-11-26 | 2021-03-19 | 苏州市万松电气有限公司 | Single-phase inverter detection system |
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