JP6297945B2 - Combined inspection system for photovoltaic power generation system - Google Patents

Description

  The present invention relates to a combined inspection apparatus for a photovoltaic power generation system for evaluating a photovoltaic power generation panel and / or a power conditioner connected to the photovoltaic power generation panel.

  In Patent Document 1, as an object of providing a photovoltaic power generation simulation device that can simulate solar cells under various sunshine conditions, a sunshine calculation device that simulates the amount of sunlight and the temperature of sunlight, and the above-described data are used. Solar power calculation device for obtaining current / voltage characteristics of photovoltaic power generation, a plurality of storage devices for storing the calculation results as table data (voltage / current data), a switching device for switching the storage devices, and the table An interpolation device that calculates a current value corresponding to a voltage value that is currently output so as to match the photovoltaic power generation characteristics (PV characteristics) based on the data, an output amplification device that inputs a set current from the interpolation device, and A photovoltaic power generation simulation device characterized by comprising: has been proposed.

  Further, Patent Document 2 provides a power conditioner inspection device that can obtain high reliability and efficiency for performance inspection of a power conditioner having high operational stability with respect to fluctuations in the amount of photovoltaic power generation and system power supply power. For this purpose, the PV simulated power supply apparatus and the system simulated power supply are tested using a power conditioner in which a PV (solar power generation) simulated power supply apparatus is connected to the input side and a system simulated power supply apparatus is connected to the output side. Output condition setting means for transmitting and setting and updating each output condition via a communication line for each of the devices, and various operations for the power conditioner via a bidirectional communication line for the power conditioner An operation command means for transmitting a command signal and an operation status signal including an error signal generated by the power conditioner. Operating state receiving means for receiving the information via the bidirectional communication line, and log file recording means for generating and recording a log file from the transmitted information on the operating command signal and the received information on the operating state signal. A power conditioner inspection device has been proposed.

Japanese Patent Application Laid-Open No. 07-234716 JP 2013-38143 A

  The photovoltaic power generation simulation devices disclosed in Patent Documents 1 and 2 are all tests for evaluating the performance of a power conditioner including an inverter device that converts DC power generated by the solar power generation device into AC power. It is a device and has been used to avoid the difficulty of inspecting with an actual photovoltaic power generation panel whose power generation state varies depending on changes in sunlight conditions.

  However, the conventional solar power generation simulation device can simulate typical power generation patterns that appear relatively well and power generation patterns that have caused problems in the past, but it is easy to simulate unexpected power generation patterns. It was not possible.

  In many cases, problems that actually occur in the field seem to have overlapped unexpected conditions. To reproduce such unexpected conditions, connect the actual photovoltaic power generation panel and the power conditioner to be evaluated. In many cases, it is necessary to verify the solar light simulation device that can reproduce the sunshine conditions that change variously.

  By the way, in order to evaluate the performance of the photovoltaic power generation panel, it is possible to evaluate the basic power generation performance by irradiating the photovoltaic power generation panel with a light source device that emits light with a predetermined light amount. Since there was no general-purpose inspection device that could comprehensively evaluate the power generation characteristics when connected to a power source, a simple test device was manufactured and inspected using an appropriate power conditioner each time. I had to.

  In view of the above-described problems, an object of the present invention is to provide a combined inspection apparatus for a photovoltaic power generation system capable of evaluating the quality and the like of a photovoltaic power generation panel and / or a power conditioner with a uniform standard.

  In order to achieve the above-mentioned object, the first characteristic configuration of the combined inspection apparatus of the photovoltaic power generation system according to the present invention is as described in claim 1 of the claims, and the photovoltaic power generation panel and / or said A combined inspection apparatus for a photovoltaic power generation system that evaluates a power conditioner connected to a photovoltaic power generation panel, and a simulated light source device that irradiates the photovoltaic power generation panel, and an alternating current from the power conditioner that is connected to a system power supply A simulated load device to which electric power is supplied, wherein the simulated light source device irradiates the photovoltaic power generation panel, and the DC power generated by the photovoltaic power generation panel is supplied to the power conditioner. The simulated light source device and / or the simulated load for evaluating the photovoltaic power generation panel and / or the power conditioner In that it includes a test condition setting unit for setting a location of the test conditions.

  DC power generated by a photovoltaic power generation panel in response to simulated sunlight emitted from the simulated light source device when the simulated light source device and / or simulated load device operates based on the test conditions set by the test condition setting unit Is input to the power conditioner, and AC power is output from the power conditioner to the simulated load device. By irradiating simulated sunlight from the simulated light source device corresponding to various sunshine conditions, various power generation characteristics of the photovoltaic power generation panel such as the VI characteristic are evaluated, for example, maximum power point tracking control and the like. Various control characteristics of the power conditioner are evaluated, and a comprehensive evaluation that links the photovoltaic power generation panel and the power conditioner becomes possible.

  In the second characteristic configuration, as described in claim 2, in addition to the first characteristic configuration described above, the test condition setting unit performs the operation of the power conditioner on the basis of the photovoltaic power generation panel. A test condition for evaluating or evaluating the photovoltaic power generation panel with respect to the power conditioner is set.

  When the photovoltaic power generation panel and the power conditioner are interlocked and both are evaluated at the same time, even if various problematic events occur, it may be difficult to identify the cause. However, it is possible to appropriately evaluate the operation performance of the power conditioner in various situations by linking the photovoltaic power generation panel whose performance has already been evaluated with the power conditioner to be evaluated. It is possible to appropriately evaluate the operation performance of the photovoltaic power generation panel in various aspects by linking the power conditioner evaluated for the above and the photovoltaic power generation panel to be evaluated.

  In the third feature configuration, in addition to the first or second feature configuration described above, the simulated light source device includes a plurality of light source lamps that are two-dimensionally distributed. And a dimming control unit that adjusts a light amount and / or a light amount distribution applied to the photovoltaic power generation panel from the plurality of light source lamps based on a test condition set by the test condition setting unit.

  By dimming the light source lamps that are two-dimensionally distributed in the dimming control unit, the light quantity and / or the light quantity distribution is adjusted in accordance with the fluctuations in various sunshine conditions. The power generation characteristics of the photovoltaic power generation panel corresponding to the fluctuation can be evaluated, and the operation performance of the power conditioner corresponding to the power generation characteristics can be evaluated.

  The fourth characteristic configuration is the temperature characteristic of the photovoltaic power generation panel irradiated from the plurality of light source lamps, in addition to the third characteristic configuration described above. The temperature control part which adjusts is further provided.

  Since the power generation characteristics of the photovoltaic power generation panel fluctuate depending on the temperature condition, it is not possible to perform proper evaluation only by dimming control of a plurality of light source lamps. Even in such a case, since the temperature of the photovoltaic panel is adjusted by the temperature control unit, not only the fluctuation of the sunshine condition but also the temperature condition of the photovoltaic panel at that time is also varied and comprehensively evaluated. Will be able to.

  In the fifth feature configuration, in addition to any of the first to fourth feature configurations described above, the test condition setting unit controls the operating state of the simulated load device. It is in the point provided with the simulation load state setting part which changes automatically.

  Appropriate evaluation of the operation characteristics of the power conditioner when the power supply state to the simulated load device is dynamically changed by dynamically changing the operating state of the simulated load device, such as impedance, by the simulated load state setting unit can do. For example, reverse power flow operation characteristics during grid connection, power supply characteristics during independent operation, and the like can be properly evaluated.

  In the sixth feature configuration, in addition to any of the first to fifth feature configurations described above, the behavior of the photovoltaic power generation panel and / or the power conditioner is measured. A signal storage unit that collects a plurality of measurement signals, and a signal storage unit that stores the signals collected by the signal measurement unit in association with the test conditions set by the test condition setting unit is there.

  The operation status of the photovoltaic power generation panel and / or power conditioner can be grasped numerically from the measurement signals collected via the signal measurement unit, and the measurement signals are stored in association with the test conditions set by the test condition setting unit. By storing in the unit, various states can be accurately reproduced and can be appropriately evaluated.

  In addition to the sixth feature configuration described above, the seventh feature configuration includes a display control unit that displays the measurement signal stored in the signal storage unit on the display unit, as described in claim 7. A screening unit that selects and highlights measurement signals that satisfy preset extraction conditions is provided.

  The measurement signal stored in the signal storage unit is displayed on the display unit by the display control unit, so that the evaluator can visually evaluate various measurement signals, and the extraction conditions set in advance by the screening unit Since the measurement signal satisfying the condition is extracted and highlighted, various measurement signals related to the evaluation target can be effectively visually evaluated.

  As described above, according to the present invention, it is possible to provide a combined inspection apparatus for a photovoltaic power generation system capable of evaluating the quality and the like of a photovoltaic power generation panel and / or a power conditioner based on a uniform standard. .

Functional block configuration diagram of a combined inspection apparatus for a photovoltaic power generation system according to the present invention Front view main part explanatory drawing of the compound inspection apparatus of the photovoltaic power generation system by this invention Side view principal part explanatory drawing of the compound inspection apparatus of the photovoltaic power generation system by this invention

Hereinafter, a combined inspection apparatus for a photovoltaic power generation system according to the present invention will be described with reference to the drawings.
FIG. 1 shows a functional block configuration of a combined inspection apparatus 1 for a photovoltaic power generation system according to the present invention. The combined inspection apparatus 1 is a combined inspection apparatus 1 that evaluates a photovoltaic power generation panel A and a power conditioner B connected to the photovoltaic power generation panel A, a simulated light source device 2 that irradiates the photovoltaic power generation panel A, and a system power supply. The simulation load device 3 is connected to the power conditioner B and supplied with AC power from the power conditioner B, and the test condition setting unit 4 sets test conditions.

  The simulated light source device 2 irradiates the photovoltaic power generation panel A and is connected so that the DC power generated by the photovoltaic power generation panel A is fed to the power conditioner B. The test condition setting unit 4 causes the photovoltaic power generation panel A to be connected. And the test conditions of the simulated light source device 2 and / or the simulated load device 3 for evaluating the power conditioner B are set.

  Connected to the test condition setting unit 4 are an input unit 5 for inputting test conditions and the like, a display unit 7 for displaying test results, and a display control unit 6 for controlling the display unit 7. The test condition setting unit 4 and the display control unit 6 are configured by a control circuit including a microcomputer that operates based on a predetermined control program and peripheral circuits such as an input / output.

  The photovoltaic power generation panel A, the power conditioner B, the simulated light source device 2 and the simulated load device 3 are provided with an interface unit IF1 provided in the test condition setting unit 4 and an interface unit IF2 for inputting and outputting signals, and the interface unit IF1. And the interface unit IF2 are connected by a communication line.

  The communication line includes a serial communication line that transmits a test command output from the test condition setting unit 4 to each of the units 2, 3, A, and B, and returns an answer from each of the units 2, 3, A, and B. It is composed of a parallel communication line that outputs measurement signals in response to the above. However, the mode of the communication line is not limited to this, and it may be configured by only the serial communication line or may be configured only by the parallel communication system. In the former case, a plurality of measurement signals are transmitted to the test condition setting unit 4 via the serial communication line.

  The interface unit IF1 receives a test command transmitted from the test condition setting unit 4, and outputs an operation command to an internal control unit or the like so that each performs a predetermined test operation or signal measurement, or in advance Output values from the various sensors incorporated are transmitted to the test condition setting unit 4.

  Necessary sensors such as an illuminance sensor, a temperature sensor, a current sensor, and a voltage sensor are provided in each of the units 2, 3, A, and B, and their values are input to the interface unit IF1 as analog signals or digital signals. It is output to the interface unit IF2 of the test condition setting unit 4.

  The test condition setting unit 4 includes a signal measurement unit 4a that collects a plurality of measurement signals for measuring the behavior of the photovoltaic power generation panel A and the power conditioner B and the behavior of the simulated light source device 2 and the simulated load device 3. A signal storage unit 4b is provided that stores the signals collected by the measurement unit 4a in association with the test conditions set by the test condition setting unit 4.

  For example, in response to the test condition set by the test condition setting unit 4 and transmitted via the communication line, various sampling data are received via the communication line at predetermined time intervals, and time series corresponding to the test condition is received. Triggered when a specific type of sampling data is in a specific signal state among various sampling data stored in the signal storage unit 4b or received via the communication line in accordance with the test condition. Various sampling data are stored in the signal storage unit 4b in time series.

  The operation state of the photovoltaic power generation panel A and / or the power conditioner B can be numerically grasped by the measurement signal collected through the signal measurement unit 4a, and measured in association with the test condition set by the test condition setting unit 4. By storing the signal in the signal storage unit 4b, various states can be accurately reproduced and can be appropriately evaluated.

  The measurement signal stored in the signal storage unit 4 b is read by the display control unit 6 and displayed on the display unit 7, whereby the evaluator can visually evaluate various measurement signals.

  Further, the display control unit 6 includes a screening unit that selects and highlights a measurement signal that satisfies a preset extraction condition, and a measurement signal that satisfies a preset extraction condition is extracted by the screening unit. Since it is highlighted, various measurement signals related to the evaluation target can be effectively visually evaluated. The highlighted display is a display in which the signal is easier to see than other signals, and a known display form such as a display with different colors or a highlight display can be appropriately used.

  That is, the simulated light source device 2 and / or the simulated load device 3 operate based on the test conditions set by the test condition setting unit 4 and respond to simulated sunlight irradiated from the simulated light source device 2. The DC power generated by A is input to the power conditioner B, and the AC power is output from the power conditioner B to the simulated load device 3.

  The simulated light source device 2 includes a plurality of light source lamps 21 and a dimming control unit 22 that adjusts the amount of power supplied to each light source lamp 21 to adjust the amount of light output from the light source lamp 21. A halogen lamp can be suitably used as the light source lamp 21, and the dimming control unit 22 variably adjusts the output light amount of the halogen lamp.

  For example, if n × m halogen lamps (n and m are positive integers) are divided into a plurality of blocks and connected, each block is connected to a power line via a slidac, and the amount of output light is adjusted for each block. It is possible to finely set fluctuations in various sunshine conditions, to simulate various conditions such as fluctuations in solar radiation, occurrence of partial shade, etc., and to evaluate the power generation characteristics of the photovoltaic power generation panel A for each The maximum power point tracking control characteristic of the power conditioner B can be evaluated. In this case, the slidac functions as the dimming control unit 22. Note that the slidac is not limited to a manual adjustment mode, and can be realized by a remote adjustment mode using an electric motor or the like.

  That is, the simulated light source device 2 irradiates the photovoltaic power generation panel A from the plurality of light source lamps 21 based on the plurality of light source lamps 21 that are two-dimensionally distributed and the test conditions set by the test condition setting unit 4. The light control part 22 which adjusts the light quantity to perform and / or light quantity distribution is comprised.

  When such a simulated light source device 2 is used, simulated solar light is irradiated from the simulated light source device 2 in response to various sunshine conditions, so that various power generations of the photovoltaic power generation panel A such as a VI characteristic can be obtained. The characteristics are evaluated, for example, various control characteristics of the power conditioner B such as maximum power point tracking control are evaluated, and a comprehensive evaluation in which the photovoltaic power generation panel A and the power conditioner B are linked becomes possible.

  The test condition setting unit 4 of the combined inspection apparatus 1 evaluates the operation of the power conditioner B with reference to the photovoltaic power generation panel A, or tests for evaluating the photovoltaic power generation panel A with reference to the power conditioner B. It is preferable to be configured to set conditions.

  When the photovoltaic power generation panel A and the power conditioner B are interlocked and both are evaluated at the same time, even if various problematic events occur, it may be difficult to determine which is the cause. However, it is possible to appropriately evaluate the operation performance of the power conditioner B in various aspects by linking the photovoltaic power generation panel A whose performance has already been evaluated and the power conditioner B which is the evaluation target. By linking the power conditioner B whose performance has already been evaluated with the photovoltaic power generation panel A that is the object of evaluation, the operational performance of the photovoltaic power generation panel A in various aspects can be appropriately evaluated. Become. That is, it becomes possible to evaluate the solar power generation panel and / or the power conditioner connected to the solar power generation panel.

  What is necessary is just to use the photovoltaic power generation panel A by which the evaluation was established previously for the photovoltaic power generation panel A used as a reference | standard, and should just use the power conditioner B by which evaluation was established previously for the power conditioner B used as a reference | standard.

  The test condition setting unit 4 includes a sunshine condition setting unit that sets sunshine conditions and a simulated load state setting unit that dynamically changes the operating state of the simulated load device 3. Based on the sunshine conditions set by the sunshine condition setting unit, the IV characteristics of the photovoltaic panel A can be evaluated, the maximum power point tracking control of the power conditioner B can be evaluated, and set by the simulated load state setting unit Based on the simulated load conditions such as power consumption and impedance, the reverse power flow operation characteristics of the power conditioner B during grid connection, the power supply characteristics during the independent operation, and the like can be evaluated.

  For example, it is possible to evaluate the influence of the inrush current during the independent operation by dynamically changing the impedance, and it is possible to evaluate the followability of the reverse power flow operation by dynamically changing the power consumption.

  For example, power conditioners can be marketed by changing the sunshine conditions at a fast cycle that is not normally generated by the sunshine condition setting unit, or by generating large load fluctuations that are not normally generated by the pseudo load state setting unit. It is possible to find and deal with bugs in control programs and problems caused by control circuits before they are put into the market, so that verification of various problems that occur after being put on the market can be reproduced with high probability. Become.

Below, the specific example of the compound inspection apparatus 1 is demonstrated.
As shown in FIGS. 2 and 3, the composite inspection apparatus 1 is configured in a rectangular parallelepiped region defined by six vertical frames 10 and twelve horizontal frames 11 formed of metal piles.

  Four wooden support plates 12 are laid across the lowermost horizontal frame 11 in the front-rear direction, a support base 13 is installed thereon, and two photovoltaic panels A are mounted on the support base 13. (A1, A2) are placed.

  Fifteen wooden support plates 14 are laid across the middle horizontal frame 11 in the front-rear direction, 14 rows in the left-right direction along each support plate 14, and nine in the front-rear direction of each row, a total of 126 light sources A lamp 21 is arranged. The light source lamp 21 is composed of a halogen lamp, and nine light source lamps 21 in each row are connected in series, and each is connected to a power source via a slidac as a dimming control unit 22. Further, a pair of blower fans 16 are provided between the middle and uppermost horizontal frames 11 at the left and right ends.

  The switchboard 15 is provided in the middle of the right side, and the light source lamp 21, the blower fan 16, the output line of the photovoltaic power generation panel A, and the like are connected thereto. Further, in the vicinity of the rectangular parallelepiped region formed by the frames 10 and 11, a plurality of slidacs as a power conditioner B, a test condition setting unit 4, a simulated load device 3, and a dimming control unit 22 are installed to set test conditions. The unit 4 and the units 2, 3, A, B, and 16 are connected by a communication line.

  The simulated load device 3 is configured such that a plurality of LRC circuits including a plurality of coils, a plurality of resistors, and a plurality of capacitors are provided, and the connection state can be changed by a switch.

  In order to avoid the influence of external light, the rectangular parallelepiped region is covered with a black curtain or the like except for the pair of left and right blower fans 16. The blower fan 16 functions as a temperature control unit that adjusts the temperature of the photovoltaic power generation panel A irradiated from the plurality of light source lamps 21. Since the power generation characteristics of the photovoltaic power generation panel A vary depending on the temperature condition, there is a possibility that proper evaluation cannot be performed only by the dimming control of the plurality of light source lamps 21. Even in such a case, since the temperature of the photovoltaic panel A is adjusted by the temperature control unit, not only the fluctuation of the sunshine condition but also the temperature condition of the photovoltaic panel at that time is also varied and comprehensively evaluated. Will be able to.

  With the combined inspection apparatus 1 configured as described above, assembly or disassembly can be performed flexibly and can be easily configured regardless of the installation location.

  Test conditions set via the input unit 5 are stored in the signal storage unit 4a provided in the test condition setting unit 4, and the simulated light source device 2 and the simulated load are based on the test conditions stored in the signal storage unit 4a. The apparatus 3 is controlled, and signals from various sensors that monitor the operation states of the photovoltaic power generation panel A and the power conditioner B are input to the test condition setting unit 4 and stored in the signal storage unit 4a. .

  The above-described embodiments are merely illustrative of one specific example of the combined inspection apparatus according to the present invention, and the combined inspection apparatus according to the present invention is not limited to the above-described specific example, and has the effects of the present invention. Needless to say, the design can be appropriately changed within the range.

1: Compound inspection device 2: Simulated light source device 3: Simulated load device 4: Test condition setting unit 4b: Signal storage unit 5: Input unit 6: Display control unit 7: Display unit A: Solar power generation panel B: Power conditioner

Claims (7)

A combined inspection apparatus for a photovoltaic power generation system for evaluating a photovoltaic power generation panel and / or a power conditioner connected to the photovoltaic power generation panel,
A simulated light source device that irradiates the photovoltaic power generation panel, and a simulated load device that is connected to a system power supply and supplied with AC power from the power conditioner,
The photovoltaic power generation panel is irradiated by the simulated light source device, and the DC power generated by the photovoltaic power generation panel is configured to be supplied to the power conditioner,
A combined inspection apparatus for a photovoltaic power generation system comprising a test condition setting unit for setting test conditions for the simulated light source device and / or the simulated load device for evaluating the photovoltaic power generation panel and / or the power conditioner .   The test condition setting unit is configured to evaluate the operation of the power conditioner with reference to the photovoltaic power generation panel, or to set test conditions for evaluating the photovoltaic power generation panel with reference to the power conditioner. The combined inspection apparatus for a photovoltaic power generation system according to claim 1, which is configured.   The simulated light source device includes: a plurality of light source lamps that are two-dimensionally distributed; and a light amount that irradiates the photovoltaic power generation panel from the plurality of light source lamps based on a test condition set by the test condition setting unit; 3. The combined inspection apparatus for a solar power generation system according to claim 1, further comprising a dimming control unit that adjusts the light amount distribution.   4. The combined inspection apparatus for a solar power generation system according to claim 3, wherein the simulated light source device further includes a temperature control unit that adjusts the temperature of the solar power generation panel irradiated from the plurality of light source lamps.   5. The combined testing apparatus for a photovoltaic power generation system according to claim 1, wherein the test condition setting unit includes a simulated load state setting unit that dynamically changes an operating state of the simulated load device.   A test including a signal measurement unit that collects a plurality of measurement signals for measuring the behavior of the photovoltaic power generation panel and / or the power conditioner, and the signal collected by the signal measurement unit is set by the test condition setting unit The composite inspection apparatus for a photovoltaic power generation system according to any one of claims 1 to 5, further comprising a signal storage unit that stores the information in association with conditions.   The display control part which displays the measurement signal memorize | stored in the said signal memory | storage part on a display part, The screening part which selects and highlights the measurement signal which satisfy | fills the preset extraction conditions is provided. Combined inspection system for solar power generation system.

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