JP2013168535A - Abnormality detection device, abnormality detection equipment, abnormality detection method and abnormality detection program for solar cell module, and photovoltaic power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable detection of abnormalities in a solar cell module in which an abnormality has already occurred, and also to allow detection of reduced generation power in a solar cell module, as an abnormality.SOLUTION: An abnormality detection device 1 for solar cell modules comprises: a power detection unit 11 for detecting the power in a first solar cell module 2; an abnormality detection unit 12 to which the power detected by a power detection unit 11 in a second solar cell module 2 connected in series to the first solar cell module 2 and the power in the first solar cell module 2 are inputted so that the power in both modules are compared with each other, thereby detecting an abnormality in the first solar cell modules 2 when a result based on the comparison is outside an allowable range of predetermined conditions; and a notification unit 13 for notifying of the abnormality in the first solar cell module 2.

Description

  The present invention relates to a solar cell module abnormality detection device, an abnormality detection facility, an abnormality detection method and an abnormality detection program, and a solar power generation apparatus including the solar cell module abnormality detection device.

  Conventionally, a solar power generation apparatus is known in which a solar battery module composed of a single solar battery cell or a plurality of solar battery cells connected in series is connected in series. An apparatus for detecting an abnormality of a solar cell module has been proposed. In Patent Document 1, bypass diodes are connected in parallel corresponding to each solar cell module, and when an abnormality occurs in the solar cell module, current flowing from other solar power generation modules connected in series flows through the bypass diode, In a solar power generation device that suppresses output reduction, an LED lamp corresponding to a solar cell module is connected in series to a bypass diode so that when an abnormality occurs, the LED lamp emits light to identify the solar cell module in which the abnormality has occurred Is disclosed.

JP-A-9-148613

  By the way, since the device of Patent Document 1 emits an LED when a current flows through a parallel-connected bypass diode corresponding to the solar cell module, the solar cell module is temporarily shaded. The LED lamp also emits light when the solar light for the battery module is temporarily insufficient. That is, it is difficult to clearly distinguish and detect when there is no abnormality in the solar cell module itself due to a temporary shortage of sunlight with respect to the solar cell module and when there is an abnormality in the solar cell module. Moreover, although the apparatus of patent document 1 can detect the abnormality which the solar cell module is not generating electric power, there exists a problem that the abnormality which the generated power of the solar cell module is falling cannot be detected as abnormality. .

  The present invention is proposed in view of the above problems, and in a solar power generation apparatus in which solar cell modules are connected in series, an abnormality of the solar cell module in which an abnormality has actually occurred can be detected, and the solar cell Solar cell module abnormality detection device, abnormality detection equipment, abnormality detection method, abnormality detection program, and solar cell module abnormality detection device capable of detecting an abnormality in which the generated power of the module is reduced as an abnormality It aims at providing a photovoltaic device.

The abnormality detection device for a solar cell module of the present invention is detected by a power detection unit that detects the power of one solar cell module and a power detection unit of another solar cell module connected in series with the one solar cell module. Power and the power of the one solar cell module are input, the two powers are compared with each other, and if the comparison result is outside the allowable range of the predetermined condition, the abnormality of the one solar cell module is detected. And an anomaly detector for notifying an abnormality of the one solar cell module.
According to this configuration, the power of one solar cell module and the power of another solar cell module are compared with each other, and when the comparison result is outside the allowable range of the predetermined condition, the abnormality is temporarily detected. It is possible to avoid erroneously detecting abnormalities when there is a shortage of sunlight to the solar cell module, such as when it is in the shade, and to detect abnormalities in the solar cell module that is actually abnormal Can do. Moreover, by detecting an abnormality of the solar cell module based on the mutual comparison of power, an abnormality in which the generated power of the solar cell module is reduced can be detected as an abnormality in addition to the abnormality that the solar cell module is not generating power. it can.

The solar cell module abnormality detection device of the present invention is characterized in that the other solar cell module connected in series with the one solar cell module is a solar cell module adjacent to the one solar cell module.
According to this configuration, it is possible to compare the power of adjacent solar cell modules in a state in which the sunlight receiving state is close to each other, and to increase the accuracy of abnormality detection based on the mutual power comparison. In addition, by using the mutual comparison of the power of adjacent solar cell modules, the abnormality detection device can be disposed in the vicinity of the solar cell module, and the necessary wiring can be made shorter and more compact.

The abnormality detection device for a solar cell module according to the present invention is characterized by having an LED lamp as the notification unit.
According to this configuration, it is possible to configure a low-cost, long-life and high-maintenance notification unit, and the accuracy of the maintenance inspector's recognition of abnormal solar cell modules by vividly emitting LED lights. The speed can be increased, and the reliability and efficiency of maintenance work can be improved.

In the abnormality detection device for a solar cell module according to the present invention, the abnormality detection unit stores a power difference threshold value and a set duration, and the electric power of the one solar cell module and the electric power of the other solar cell module. A power difference is obtained by mutual comparison, the acquired power difference is compared with the threshold value to determine whether the acquired power difference is equal to or greater than the threshold value, and a state where the acquired power difference is equal to or greater than the threshold value is a set duration time When the above is continued, an abnormality of the one solar cell module is detected as being outside the allowable range of the predetermined condition.
According to this configuration, when the state where the acquired power difference is equal to or greater than the threshold value continues for the set duration or longer, the solar cell module temporarily lacks sunlight when it is temporarily shaded by detecting an abnormality. In such a case, it is possible to reliably avoid erroneously detecting an abnormality, and to accurately detect an abnormality of the solar cell module in which an abnormality has actually occurred. In particular, the accuracy of the detected abnormality can be made extremely high by detecting the abnormality when a state equal to or higher than the threshold value continues.

In the abnormality detection device for a solar cell module of the present invention, the abnormality detection unit stores a power difference threshold, a setting determination count, and a setting determination interval, and the power of the one solar cell module and the other solar cell module The power difference is compared with each other to acquire a power difference, the acquired power difference is compared with the threshold value to determine whether the acquired power difference is equal to or greater than the threshold value, and the acquired power difference is equal to or greater than the threshold value. Is equal to or greater than the number of setting determinations performed at each setting determination interval, an abnormality of the one solar cell module is detected as being outside the allowable range of the predetermined condition.
According to this configuration, when the state where the acquired power difference is equal to or greater than the threshold is equal to or greater than the set determination count, the solar cell module temporarily lacks sunlight, such as when it is temporarily shaded by detecting an abnormality. In such a case, it is possible to reliably avoid erroneously detecting an abnormality, and to accurately detect an abnormality of the solar cell module in which an abnormality has actually occurred. Further, it is possible to detect an abnormality based on intermittent threshold determination operation, and it is possible to suppress power consumption of the abnormality detection device.

In the abnormality detection device for a solar cell module according to the present invention, the abnormality detection unit stores a threshold value and a set time, or a set number of times and a set interval of power difference, and the power of the one solar cell module and the Comparing with the power of other solar cell modules to obtain a power difference, integrating the acquired power difference over the set time, or the set number of times for each set interval, to obtain an integrated amount, The acquired integrated amount is compared with the threshold value to determine whether the acquired integrated amount is equal to or greater than the threshold value, and when the acquired integrated amount is equal to or greater than the threshold value, it is determined that the predetermined condition is outside an allowable range. An abnormality of the solar cell module is detected.
According to this configuration, by detecting an abnormality when the accumulated amount of power difference is greater than or equal to a threshold value, it is erroneously detected when sunlight for the solar cell module is temporarily insufficient, such as when it is temporarily shaded. It is possible to reliably avoid the abnormality detection, and it is possible to accurately detect the abnormality of the solar cell module in which an abnormality has actually occurred. In addition, when determining by integrating the integrated amount over the set time, the accuracy of the detected abnormality can be further increased, and the integrated amount is determined over the set number of times for each set interval. In this case, the power consumption of the abnormality detection device can be suppressed by intermittent integration operation.

In the abnormality detection device for a solar cell module according to the present invention, the abnormality detection unit performs transmission control of an abnormality signal of the one solar cell module to the outside along with the detection of the abnormality of the one solar cell module. Features.
According to this configuration, an abnormality of the solar cell module can be recognized at a position away from the solar cell module such as a remote place, and work such as repair and replacement of the solar cell module can be performed as necessary.

In the abnormality detection device for a solar cell module of the present invention, the abnormality detection unit stores an allowable range of another predetermined condition that is wider than the allowable range of the predetermined condition, and the result based on the comparison is the other When the predetermined condition is outside the allowable range, transmission control of the abnormal signal of the one solar cell module to the outside is performed.
According to this configuration, an abnormality of the solar cell module can be recognized at a position away from the solar cell module such as a remote place, and work such as repair and replacement of the solar cell module can be performed as necessary. In addition, for example, by sending only abnormalities with high urgency so that the abnormalities can be recognized externally, it becomes possible to preferentially handle abnormalities with high urgency, and overall maintenance management work for solar cell modules Efficiency can be improved.

The solar cell module abnormality detection device of the present invention is characterized in that a part of the generated power of the solar power generation device having the solar cell modules connected in series is supplied as a control power source.
According to this configuration, it is possible to supply the control power of the abnormality detection device inside the solar power generation device by using a part of the generated power of the solar power generation device configured by the solar cell module as the control power source. Further, by supplying the control power from the entire solar power generation apparatus, the control power can be stably supplied regardless of the state of each individual solar cell module.

The solar cell module abnormality detection device of the present invention is connected in parallel to the one solar cell module when the one solar cell module generates power and when the one solar cell module does not generate power. The power obtained by reversing the polarity of the voltage from the upstream side and the downstream side in the current flow of the bypass diode is supplied as a control power source.
According to this structure, the control power supply of the abnormality detection device can be internally supplied from the solar cell module and the bypass diode. In addition, even when the solar cell module is abnormal without generating power, the forward voltage generated by the current flowing through the bypass diode can be used with the polarity reversed, at the time of power generation and failure of the solar cell module Regardless, the abnormality detection device can be operated stably. This also means that a part of the heat loss of the bypass diode is used as a control power supply, so that it is possible to suppress the temperature rise in the vicinity of the solar cell module due to the heat generated by the bypass diode and to prevent the accompanying decrease in power generation efficiency. it can. Moreover, since a control power supply can be generated inside a bypass diode corresponding to each solar cell module, a long control power supply line from external equipment to the abnormality detection device is not required, and the entire cable can be made compact.

According to the solar cell module abnormality detection device of the present invention, the power when the one solar cell module generates power and the power obtained by reversing the polarity of the voltage when power generation of the one solar cell module is stopped are converted into a voltage. Is supplied as a control power source via the unit, the abnormality detection unit acquires a voltage before being converted by the voltage conversion unit, and a reference voltage generated from a voltage after conversion by the voltage conversion unit or the When the reference voltage stored in the abnormality detection unit is compared with the voltage before being converted by the voltage conversion unit, and the acquired voltage before the conversion is outside the allowable range defined by the reference voltage An abnormality of the one solar cell module is detected.
According to this configuration, even when one solar cell module and the other solar cell module are both abnormal and cannot be detected by power comparison, it is possible to detect an abnormality such as a decrease in generated power of one solar cell module. It is possible to detect the abnormality of the solar cell module more reliably.

The solar cell module abnormality detection facility of the present invention corresponds to each of the solar cell modules sequentially connected in series, and corresponds to each of the solar cell modules, a power detection unit that detects the power of the solar cell modules, Abnormality detection that detects the abnormality of the corresponding solar cell module when the power of the corresponding solar cell module and the power of other solar cell modules are compared with each other and the result based on the comparison is outside the allowable range of the predetermined condition Corresponding to each of the solar cell modules, and a notification unit for notifying the abnormality of the corresponding solar cell module, each of the abnormality detection units is connected via a communication line, and via the communication line The abnormality detection unit corresponding to one solar cell module detects an abnormality corresponding to another solar cell module. The state in which the power of other solar cell modules cannot be acquired from the state, or the state in which the power of other solar cell modules acquired from the abnormality detection unit corresponding to the other solar cell modules is equal to or less than a threshold is set and stored. When it is outside the allowable range, an abnormality of the other solar cell module is detected, and an abnormality of the other solar cell module is detected as an abnormality of the one solar cell module by the notification unit corresponding to the one solar cell module. It is characterized by announcing with different patterns.
According to this configuration, the power of the solar cell modules is compared with each other, and when the comparison result is outside the allowable range of the predetermined condition, an abnormality is detected, so that the solar cell module is temporarily shaded, etc. It is possible to avoid erroneously detecting an abnormality when sunlight is temporarily insufficient, and it is possible to detect an abnormality of a solar cell module in which an abnormality has actually occurred. Moreover, by detecting an abnormality of the solar cell module based on the mutual comparison of power, an abnormality in which the generated power of the solar cell module is reduced can be detected as an abnormality in addition to the abnormality that the solar cell module is not generating power. it can. Furthermore, when an abnormality occurs in the abnormality detection unit corresponding to another solar cell module and the corresponding notification unit cannot notify the abnormality, or when the abnormality notification of the other solar cell module cannot be notified due to disconnection or the like In addition, the notification unit corresponding to one solar cell module can detect and notify an abnormality of another solar cell module.

The solar cell module abnormality detection facility of the present invention corresponds to each of the solar cell modules sequentially connected in series, and corresponds to each of the solar cell modules, a power detection unit that detects the power of the solar cell modules, Abnormality detection that detects the abnormality of the corresponding solar cell module when the power of the corresponding solar cell module and the power of other solar cell modules are compared with each other and the result based on the comparison is outside the allowable range of the predetermined condition Corresponding to each of the solar cell modules, and a notification unit for notifying the abnormality of the corresponding solar cell module, each of the abnormality detection units is connected via a communication line, and via the communication line The necessary power is acquired and an abnormality detection unit corresponding to one solar cell module is connected to the upstream solar cell module in series connection. The state where the power of the upstream solar cell module cannot be acquired from the abnormality detection unit or the state where the power of the upstream solar cell module acquired from the abnormality detection unit corresponding to the upstream solar cell module is below the threshold is set When it is outside the allowable range of the stored predetermined condition, the abnormality of the upstream solar cell module is detected, and the abnormality of the upstream solar cell module is detected by the notification unit corresponding to the one solar cell module. Announcement is made in a pattern different from the abnormality of the one solar cell module, and the abnormality detection unit corresponding to the one solar cell module is a solar cell downstream from the abnormality detection unit corresponding to the downstream solar cell module connected in series. The module power cannot be acquired, or the downstream thickness acquired from the anomaly detector corresponding to the downstream solar cell module When the state where the power of the battery module is less than or equal to the threshold value is outside the allowable range of the predetermined condition that is set and stored, an abnormality in the downstream solar cell module is detected, and the notice corresponding to the one solar cell module is detected The unit notifies the abnormality of the downstream solar cell module in a pattern different from the abnormality of the one solar cell module and the abnormality of the upstream solar cell module.
According to this configuration, the power of the solar cell modules is compared with each other, and when the comparison result is outside the allowable range of the predetermined condition, an abnormality is detected, so that the solar cell module is temporarily shaded, etc. It is possible to avoid erroneously detecting an abnormality when sunlight is temporarily insufficient, and it is possible to detect an abnormality of a solar cell module in which an abnormality has actually occurred. Moreover, by detecting an abnormality of the solar cell module based on the mutual comparison of power, an abnormality in which the generated power of the solar cell module is reduced can be detected as an abnormality in addition to the abnormality that the solar cell module is not generating power. it can. Furthermore, if an abnormality occurs in the anomaly detection unit corresponding to the upstream or downstream solar cell module and the corresponding notification unit cannot notify the abnormality, it responds to an abnormality in the upstream or downstream solar cell module due to disconnection, etc. Even when the notification unit cannot notify, the notification unit corresponding to one solar cell module can detect and notify abnormality of the solar cell module on the upstream side or the downstream side. Furthermore, by changing the pattern of notification of an abnormality in one solar cell module, an abnormality in the upstream solar cell module, and an abnormality in the downstream solar cell module, For example, an abnormal solar cell module sandwiched between a slow blinking LED lamp and a fast blinking LED lamp can be easily and accurately identified.

The abnormality detection method for a solar cell module according to the present invention is a first step of detecting the power of one solar cell module and detecting the power of another solar power generation module connected in series with the one solar cell module. And the detected power of the one solar cell module and the power of the other solar cell module are compared with each other, and if the result based on the comparison is outside the allowable range of the predetermined condition, the one solar cell A second step of detecting a module abnormality and a third step of notifying the abnormality of the one solar cell module are provided.
According to this configuration, the power of one solar cell module and the power of another solar cell module are compared with each other, and when the comparison result is outside the allowable range of the predetermined condition, the abnormality is temporarily detected. It is possible to avoid erroneously detecting abnormalities when there is a shortage of sunlight to the solar cell module, such as when it is in the shade, and to detect abnormalities in the solar cell module that is actually abnormal Can do. Moreover, by detecting an abnormality of the solar cell module based on the mutual comparison of power, an abnormality in which the generated power of the solar cell module is reduced can be detected as an abnormality in addition to the abnormality that the solar cell module is not generating power. it can.

The abnormality detection program for a solar cell module according to the present invention includes means for recognizing a power difference between the power of one solar cell module and the power of another solar cell module connected in series with the one solar cell module, and the power difference. And the computer is caused to function as a means for detecting an abnormality of the one solar cell module when a result based on the comparison is outside an allowable range of a predetermined condition.
According to this configuration, the power of one solar cell module and the power of another solar cell module are compared with each other, and when the comparison result is outside the allowable range of the predetermined condition, the abnormality is temporarily detected. It is possible to avoid erroneously detecting abnormalities when there is a shortage of sunlight to the solar cell module, such as when it is in the shade, and to detect abnormalities in the solar cell module that is actually abnormal Can do. Moreover, by detecting an abnormality of the solar cell module based on the mutual comparison of power, an abnormality in which the generated power of the solar cell module is reduced can be detected as an abnormality in addition to the abnormality that the solar cell module is not generating power. it can.

The solar power generation device of the present invention includes the abnormality detection device for the solar cell module of the present invention or the abnormality detection facility for the solar cell module of the present invention.
According to this structure, the solar power generation device which has the effect of the abnormality detection apparatus of the solar cell module of this invention can be obtained.

  ADVANTAGE OF THE INVENTION According to this invention, in the solar power generation device with which a solar cell module is connected in series, while being able to detect the abnormality of the solar cell module in which abnormality has actually generate | occur | produced, the generated electric power of a solar cell module falls. An abnormal condition can be detected as an abnormal condition.

Explanatory drawing which shows a part of solar power generation device which has the abnormality detection apparatus of the solar cell module of 1st Embodiment. Explanatory drawing explaining the power supply to the abnormality detection apparatus of the solar cell module of 1st Embodiment. The block diagram which shows the structure of the abnormality detection apparatus of the solar cell module of 1st Embodiment. The circuit diagram of the circuit structural example of the abnormality detection apparatus of the solar cell module of 1st Embodiment. The flowchart which shows the 1st example of the abnormality detection process in 1st Embodiment. The flowchart which shows the 2nd example of the abnormality detection process in 1st Embodiment. The flowchart which shows the 3rd example of the abnormality detection process in 1st Embodiment. The block diagram which shows the structure of the abnormality detection apparatus of the solar cell module of 2nd Embodiment. The circuit diagram of the circuit structural example of the abnormality detection apparatus of the solar cell module of 2nd Embodiment. The flowchart which shows the 1st example of the abnormality detection process in 2nd Embodiment. The flowchart which shows the 2nd example of the abnormality detection process in 2nd Embodiment. Explanatory drawing which shows the maintenance management system with respect to the solar cell module by which abnormality was detected. Explanatory drawing which shows a part of solar power generation device which has the abnormality detection apparatus of the solar cell module of 3rd Embodiment. The circuit diagram of the circuit structural example of the abnormality detection apparatus of the solar cell module of 3rd Embodiment. (A) And (b) is a circuit explanatory drawing of the circuit structural example of a rectifier circuit. Explanatory drawing which shows the structural example of a voltage converter. The circuit diagram which shows the circuit structural example of the modification of the abnormality detection apparatus of the solar cell module of 3rd Embodiment. The flowchart which shows the abnormality detection process example based on the voltage in the modification of 3rd Embodiment. Explanatory drawing which shows a part of solar power generation device which has the abnormality detection apparatus of the solar cell module of 4th Embodiment. The circuit diagram of the circuit structural example of the abnormality detection apparatus of the solar cell module of 4th Embodiment. The flowchart which shows the example of abnormality detection processing in 4th Embodiment.

[Abnormality Detection Device and Abnormality Detection Method for Solar Cell Module of First Embodiment]
An abnormality detection device for a solar cell module according to a first embodiment of the present invention will be described. The solar cell module abnormality detection device 1 of the first embodiment is provided as a part of a solar power generation device configured by connecting solar cell modules 2 in series with a power trunk line ML as shown in FIG. is there. The solar cell module 2 is composed of a single solar cell 21 or a plurality of solar cells 21 connected in series as shown in the figure, and the single solar cell 21 or serially connected. A bypass diode 3 is connected to the solar battery cell 21 in parallel.

  The abnormality detection device 1 is provided corresponding to each of the solar cell modules 2. The abnormality detection devices 1 are connected to each other via a communication line CL, and the value of electric power generated by the other solar cell module 2 by the abnormality detection device 1 corresponding to one solar cell module 2 via the communication line CL. Can be obtained. In 1st Embodiment, the other solar cell module 2 from which the abnormality detection apparatus 1 corresponding to the one solar cell module 2 acquires the value of electric power is basically adjacent to the one solar cell module 2 in series. The other solar cell module 2 connected to the solar cell module 2 located at both ends of the power trunk line ML connecting the solar cell modules 2 in series is one solar cell module located at one end. 2 is configured to acquire the power value of the other solar cell module 2 located at the other end, but the solar cell modules 2 and 2 for comparing the powers are connected in series. Of the solar cell modules 2, the solar cell modules 2 and 2 can be appropriately connected to each other.

  The abnormality detection device 1 is supplied with control power via the control power line PL, and the control power in the first embodiment is solar light composed of solar cell modules 2 connected in series. A part of the power generated by the power generator is supplied. That is, as shown in FIG. 2, the power generated by the solar cell modules 2 connected in series in the photovoltaic power generation apparatus is sent to the relay box 4 via the power trunk line ML, and sent from the relay box 4 to a power conditioner or the like. The branching section 41 of the relay box 4 branches a part of the power from the power of the power trunk line ML. The voltage of the branched power is converted into a voltage corresponding to the abnormality detection device 1 by the voltage conversion unit 42 such as a DC-DC converter, and the converted power is supplied to the control power line PL as a control power source of the abnormality detection device 1. Supplied through.

  As shown in FIG. 3, the abnormality detection device 1 includes a power detection unit 11 that detects the power of one solar cell module 2, an arithmetic control unit that performs predetermined processing, a storage unit that stores data, and the like. An abnormality that detects the abnormality of one solar cell module 2 when the power of both of the solar cell module 2 and the other solar cell module 2 is compared with each other and the result based on the comparison is outside the allowable range of the predetermined condition The detection part 12 and the notification part 13 which notifies abnormality of one solar cell module are provided. The abnormality detection unit 12 receives the power of one solar cell module 2 from the power detection unit 11 and is detected by the power detection unit 12 of another solar cell module 2 connected in series with the one solar cell module 2. The inputted power is input via the communication line CL, and both powers can be compared with each other. In addition, the notification unit 13 is configured by, for example, an LED lamp or a speaker described later, and a maintenance manager or the like at a short distance of the solar cell module 2 in which an abnormality has been detected can recognize the solar cell module 2 in which the abnormality has been detected. It is installed in the vicinity of the solar cell module 2, for example.

  As a circuit configuration example of the abnormality detection device 1 of the first embodiment, it is preferable to configure as shown in FIG. 4, for example. The abnormality detection device 1 corresponding to one solar cell module 2 in the example of FIG. 4 includes a non-contact current sensor 111, an amplifier 112, and a multiplier 113 as the power detection unit 11, and a comparator 121 as the abnormality detection unit 12. It has the determination detector 122 and has an LED lamp as the notification unit 13. Control power is supplied from the control power line PL to each of the non-contact current sensor 111, the amplifier 112, the multiplier 113, the comparator 121, the determination detector 122, and the notification unit 13, but in FIG. PL is omitted.

  The non-contact current sensor 111 of the power detection unit 11 detects, for example, a magnetic field generated by a current flowing through the power trunk line ML with a Hall element, and is arranged in a non-contact manner on the power trunk ML that connects the solar cell modules 2 in series. Is done. The amplifier 112 is connected to amplify the current input from the non-contact current sensor 111 and output the amplified current to the multiplier 113. The multiplier 113 is connected in parallel to the solar cell module 2 and the bypass diode 3, and receives the voltage of the electromotive force of the solar cell module 2 and the current from the amplifier 112, and the solar cell module 2 from the input voltage and current. The generated power is calculated and acquired, and the acquired power is output to the comparison unit 121 of the abnormality detection unit 12 described later, and is output to the comparator 121 of the abnormality detection device 1 corresponding to the other adjacent solar cell module 2. It has become.

  The comparator 121 of the abnormality detection unit 12 is connected to the multiplier 113 and is also connected to the multiplier 113 of the abnormality detection device 1 corresponding to the other solar cell module 1 via the communication line CL. From 113, the power generated by one solar cell module and the power generated by another solar cell module 2 are input. The comparator 121 compares the power of one solar cell module 2 with the power of the other solar cell module 2 to acquire a power difference, and outputs the acquired power difference to the determination detector 122.

  The determination detector 122 includes an arithmetic control unit that operates according to a predetermined abnormality detection program, an abnormality detection program, a storage unit that stores various data, and the like, and is connected to an output unit of the comparator 121. The power difference between the power of one solar cell module 2 and the power of another solar cell module 2 is input. The determination detector 122 stores data of an allowable range of a predetermined condition in the storage unit, and an input power difference or a value obtained by performing a predetermined arithmetic process on the power difference is an allowable value of the predetermined condition. When it is out of range, an abnormality of one solar cell module 2 is detected. The predetermined condition to be stored is, for example, a power difference threshold value and a setting duration in a first example of an abnormality detection process described later, or a power difference threshold value, a setting determination count, and a setting determination interval in a second example of the abnormality detection process. Alternatively, it is preferable to set the threshold value and the set time, or the set number of times and the set interval of the power difference in the third example of the abnormality detection process.

  The LED lamp of the notification unit 13 is connected to the determination detector 122 and is turned on / off under the control of the determination detector 122. The determination detector 122 responds to the abnormality detection of one solar cell module 2. Then, the LED lamp of the notification unit 13 is controlled to be turned on.

  When the abnormality detection process is performed by the solar cell module abnormality detection device 1 according to the first embodiment, as shown in FIGS. 5 to 7, the power detection unit 11 corresponding to one solar cell module 2 performs one detection. The power of the other solar cell module 2 detected by the power detection unit 11 corresponding to the other solar power generation module 2 connected in series with the one solar cell module 2 is detected. , Detected by being input via the communication line CL (S101, S111, S121). In the example of FIG. 4, the power detection by the power detection unit 11 is performed by multiplying the power of the solar cell module 2 from the current input via the non-contact current sensor 111 and the amplifier 112 and the voltage of the solar cell module 2. Get the operation with.

  Next, in the abnormality detection unit 12 of the abnormality detection device 1 corresponding to one solar cell module, the electric power of one solar cell module 2 and the electric power of other solar cell modules 2 input from each electric power detection unit 11 are used. If the comparison results are obtained, the comparison result is obtained, it is determined whether or not the result based on the comparison is outside the allowable range of the predetermined condition, and if the result based on the comparison is outside the allowable range of the predetermined condition, The abnormality of the solar cell module 2 is detected.

  The processing from the mutual comparison of power to detection of abnormality is, for example, as shown in FIG. 5 in the case of the first example using the determination detector 122 that stores the threshold value of power difference and the set duration time as predetermined conditions and performs abnormality detection. In the comparator 121, the power of one solar cell module 2 and the power of the other solar cell module 2 are compared with each other to obtain a power difference (S102). It is determined whether or not the acquired power difference is greater than or equal to the threshold by comparing the threshold (S103). This determination can be performed at an appropriate timing such as every 200 msec. When the acquired power difference is equal to or greater than the threshold, the determination detector 122 determines whether or not the state where the acquired power difference is equal to or greater than the threshold continues for the set duration (S104), and the acquired power difference is equal to or greater than the threshold. , The abnormality of one solar cell module 2 is detected as being outside the allowable range of the predetermined condition (S105). If the acquired power difference is not equal to or greater than the threshold value, or if the state where the acquired power difference is equal to or greater than the threshold value does not continue for the set duration or longer, the processes of S101 to S104 are repeated.

  The determination detector 122 controls the notification unit 13 to perform a predetermined operation, such as controlling the LED lamp to be turned on when an abnormality of one solar cell module 2 is detected. 13, the abnormality of one solar cell module 2 is notified (S106). In the first example, it is possible to extremely increase the accuracy of the detected abnormality by detecting the abnormality when a state equal to or greater than the threshold value continues.

  Further, for example, in the case of the second example in which the threshold value of the power difference, the number of setting determinations, and the setting determination interval are stored as predetermined conditions and the determination detector 122 that performs abnormality detection is used, as illustrated in FIG. The power difference between the power of one solar cell module 2 and the power of the other solar cell module 2 is compared with each other to obtain a power difference (S112). It is determined whether or not the power difference is greater than or equal to a threshold value (S113). When the acquired power difference is equal to or greater than the threshold, the determination detector 122 determines whether or not a state where the acquired power difference is equal to or greater than the threshold continues for the number of setting determinations performed at each setting determination interval (S114). When the state where the power difference is equal to or greater than the threshold value continues for the set number of determinations or more, an abnormality of one solar cell module 2 is detected as being outside the allowable range of the predetermined condition (S115). If the acquired power difference is not greater than or equal to the threshold value, and the state where the acquired power difference is equal to or greater than the threshold value has not continued for the set determination number of times, the processes of S111 to S114 are repeated.

  When an abnormality of one solar cell module 2 is detected, the determination detector 122 controls the notification unit 13 to perform a predetermined operation in the same manner as in the first example, and the abnormality detection device 1 uses the one solar cell in the notification unit 13. An abnormality of the battery module 2 is notified (S116). In the second example, an abnormality can be detected based on the intermittent threshold determination operation, and the power consumption of the abnormality detection device 1 can be suppressed.

  Further, for example, in the case of the third example using the determination detector 122 that stores the threshold value and the set time or the set number of times and the set interval of the power difference as a predetermined condition and performs abnormality detection, as shown in FIG. The comparator 121 compares the power of one solar cell module 2 with the power of another solar cell module 2 to obtain a power difference (S122), and the determination detector 122 sets the obtained power difference to the set time. An integrated amount is obtained by integrating over a set number of times for every set interval (S123).

  Next, the determination detector 122 compares the acquired integrated amount with a threshold value of the integrated amount of power difference to determine whether or not the acquired integrated amount is equal to or greater than the threshold value (S124). When the acquired power difference is equal to or greater than the threshold, the determination detector 122 detects an abnormality of the one solar cell module 2 as being outside the allowable range of the predetermined condition (S125). If the acquired integrated amount is not greater than or equal to the threshold value, the processes of S121 to S124 are repeated.

  When an abnormality of one solar cell module 2 is detected, the determination detector 122 controls the notification unit 13 to perform a predetermined operation similarly to the first example and the second example, and the abnormality detection device 1 includes the notification unit 13. Then, the abnormality of the one solar cell module 2 is notified (S126). In the third example, when determining by integrating the integrated amount over the set time, it is possible to further increase the accuracy of the detected abnormality, and the integrated amount is integrated over the set number of times for each set interval. In the case of determination, the power consumption of the abnormality detection device can be suppressed by intermittent integration operation.

  According to the abnormality detection device 1 or abnormality detection method for a solar cell module of the first embodiment, the power of one solar cell module 2 and the power of another solar cell module 2 are mutually compared, and the comparison result is a predetermined condition. By detecting an abnormality when it is out of the allowable range, it is possible to avoid erroneously detecting an abnormality when the solar cell module 2 is temporarily short of sunlight, such as when it is temporarily in the shade. For example, an abnormality of the solar cell module 2 in which an abnormality such as internal damage or disconnection of the solar cell module 2 is actually occurring can be detected. Further, by detecting an abnormality of the solar cell module 2 based on the mutual comparison of electric power, in addition to the abnormality that the solar cell module 2 is not generating power, the abnormality that the generated power of the solar cell module 2 is reduced is also detected as an abnormality. can do. Further, it is possible to eliminate the waste of notification operation such as light emission of the LED lamp when no abnormality actually occurs.

  Moreover, the control power supply of the abnormality detection apparatus 1 can be supplied inside a solar power generation device by using a part of the generated power of the solar power generation device comprised by the solar cell module 2 as a control power supply. Further, by supplying the control power from the entire solar power generation device, the control power can be stably supplied regardless of the state of each individual solar cell module 2.

  Moreover, when comparing the electric power of the adjacent solar cell module 2, the electric power of the solar cell module 2 in the state where the sunlight receiving state is close is compared, and the accuracy of abnormality detection based on the mutual power comparison is increased. In addition, the abnormality detection device 1 can be disposed in the vicinity of the solar cell module 2, and the necessary wiring can be made shorter and more compact. In addition, when the notification unit 13 is an LED lamp, the notification unit 13 can be configured with low cost, long life, and high maintainability. The accuracy and speed of recognition by the maintenance inspector for the module 2 can be increased, and the certainty and efficiency of the maintenance inspection work can be improved.

[Solar Cell Module Abnormality Detection Device and Abnormality Detection Method of Second Embodiment]
An abnormality detection device for a solar cell module according to a second embodiment of the present invention will be described. As shown in FIGS. 8 and 9, the abnormality detection device 1a of the second embodiment has the same basic configuration as that of the first embodiment, but the abnormality detection unit 12a is different from the first embodiment in that the first The comparator 121 is the same as that of the embodiment, and the determination detector 122a is different from that of the first embodiment. Further, an abnormality signal transmission line SL is connected to the determination detector 122a of the abnormality detector 12a, and the abnormality signal ES can be transmitted from the determination detector 122a to the outside through the abnormality signal transmission line SL.

  Similar to the determination detector 122 of the first embodiment, the determination detector 122a includes an arithmetic control unit that operates according to a predetermined abnormality detection program, an abnormality detection program, a storage unit that stores various data, and the like. The difference between the power of one solar cell module 2 and the power of another solar cell module 2 is input from the comparator 121. The determination detector 122a stores data of an allowable range of a predetermined condition in the storage unit, and an input power difference or a value obtained by performing a predetermined arithmetic process on the power difference is an allowable value of the predetermined condition. When it is out of range, an abnormality of one solar cell module 2 is detected. The stored predetermined conditions are preferably the same conditions as in the first to third examples in the first embodiment.

  Further, the determination detector 122a controls to turn on the LED lamp of the notification unit 13 according to the abnormality detection of one solar cell module 2, and the abnormality of the solar cell module 2 under the same condition or different conditions. In response to the detection, an abnormal signal ES of one solar cell module 2 is generated and transmitted to the outside. Here, in the case where the abnormality signal ES of one solar cell module 2 is generated and transmitted to the outside in response to the abnormality detection of the solar cell module 2 under different conditions, the determination detector 122a has a predetermined condition. When the allowable range of another predetermined condition having a wider allowable range than the predetermined allowable range is stored in the storage unit, and the result based on the comparison is outside the allowable range of the other predetermined condition, the abnormality signal ES of one solar cell module The transmission control to the outside is performed. The abnormal signal ES transmitted by the transmission control of the determination detector 122a is transmitted to the outside through the abnormal signal transmission line SL.

  When abnormality detection processing is performed by the solar cell module abnormality detection device 1 according to the second embodiment, the power of one solar cell module 2 and the power of other solar cell modules are detected, and the power of one solar cell module 2 is detected. When the result based on the comparison is outside the allowable range of the predetermined condition, the result based on the comparison is outside the allowable range of the predetermined condition. An abnormality detection process for one solar cell module 2 is performed in the same manner as in the first embodiment.

  For example, in the example of FIG. 10, similarly to the first example in the first embodiment, detection of power of one solar cell module 2 and power of other solar cell modules (S201), power of one solar cell module 2 and Acquisition of power difference by mutual comparison with power of other solar cell modules 2 (S202), determination of whether or not the acquired power difference by comparison between the acquired power difference and the threshold is greater than or equal to the threshold (S203), acquired power difference Is determined to be outside the allowable range of the predetermined condition when the state where the acquired power difference is equal to or greater than the threshold continues for the set duration or longer (S204). Detection of abnormality of the solar cell module 2 (S205), and notification (S206) by the notification unit 13 of abnormality of one solar cell module 2.

  Further, the determination detector 122a is based on the detection of the abnormality of the solar cell module 2 under the same condition, in other words, based on the determination as to whether or not a state where the acquired power difference is equal to or greater than a threshold value continues for a set duration or longer. In response to detection of an abnormality in one solar cell module 2, an abnormality signal ES of one solar cell module 2 having information for specifying the position of the one solar cell module 2 is generated and transmitted to the outside (S207). . Similarly, in the case of the second example and the third example in the first embodiment, the abnormality signal ES of one solar cell module 2 is generated in response to the abnormality detection of the solar cell module 2 under the same condition. It is possible to adopt a configuration for controlling transmission to the outside.

  In addition, in the example of FIG. 11, the first embodiment is an example in which the abnormality signal ES of one solar cell module 2 is generated and transmitted to the outside in response to the abnormality detection of the solar cell module 2 under different conditions. As in the first example, the detection of the power of one solar cell module 2 and the power of another solar cell module (S211), the mutual power of the power of one solar cell module 2 and the power of another solar cell module 2 Acquisition of power difference by comparison (S212), determination of whether or not the acquired power difference by comparison between the acquired power difference and the threshold is greater than or equal to the threshold (S213), 1 set duration) or more (S214), and when the state where the acquired power difference is equal to or greater than the threshold value continues for the set duration or longer, one solar cell is deemed to be outside the allowable range of the predetermined condition Joule 2 abnormality detection (S215), performs the notification according to the one solar cell module 2 of the abnormality notification part 13 (S216).

  The determination detector 122a stores a second setting duration time longer than the first setting duration time as another predetermined condition in the storage unit, and the determination detector 122a has an acquired power difference equal to or greater than a threshold value. It is determined whether or not this state continues for the second set duration or longer (S217). As a result of the determination, when the state where the acquired power difference is equal to or greater than the threshold value continues for the second set duration or longer, the determination detector 122a includes one solar cell having information for identifying one solar cell module 2. An abnormal signal ES of the battery module 2 is generated and transmitted to the outside (S218). Note that when the state where the acquired power difference is equal to or greater than the threshold does not continue for the second set duration or longer, the processing of S211 to S218 is repeated.

  Similarly, in the case of the second example and the third example in the first embodiment, the abnormality signal ES of one solar cell module 2 is generated in response to the abnormality detection of the solar cell module 2 under one of different conditions. It is possible to adopt a configuration for controlling transmission to the outside. For example, in the case of the second example, in addition to the predetermined condition of the power difference threshold, the number of setting determinations, and the setting determination interval, another setting determination number and another setting determination interval are used as another predetermined condition. In this case, in addition to the threshold value of the integrated amount of power difference and the set time, or a predetermined condition of the set number of times and the set interval, another set time or another set number of times and another set interval are used as the predetermined condition. It is possible. Note that appropriate conditions corresponding to a predetermined condition and another predetermined condition can be set to the same numerical value as necessary, but each of the different predetermined conditions has a wider allowable range than the predetermined condition. It is preferable to define the conditions. Moreover, it is also possible to use an appropriate combination of these predetermined conditions and other predetermined conditions within a possible range.

  The abnormality signal ES transmitted to the outside in the abnormality detection process in the second embodiment is used in, for example, the maintenance management system shown in FIG. In the maintenance management system of FIG. 12, the solar power generation device 100 including the solar cell modules 2 connected in series and including the abnormality detection device 1 is a child of the slave station 200 located outside via the abnormality signal transmission line SL that is a dedicated line. It is connected to the station controller 210. The slave station 200 is an electrical room in which the operation status of the photovoltaic power generation apparatus 100 is managed, ventilation, emergency facilities are controlled, and the like. The slave station control device 210 includes an arithmetic control unit such as a CPU, a storage unit, a display unit such as a display, and an input unit such as a button.

  Furthermore, the slave station control device 210 is connected to the master station control device 310 of the external master station 300 located at a remote location via an abnormal signal transmission line SL ′ that is a dedicated line. The master station 300 is a central office of a facility in which data sent from a plurality of slave stations 200 (electrical rooms) is centrally monitored and controlled, and a supervisor is stationed. The master station control device 310 includes an arithmetic control unit such as a CPU, a storage unit, a display unit such as a display, and an input unit such as a button. Reference numeral 400 is a management office where maintenance inspectors are stationed, and 401 is a control office of a management office where maintenance inspectors are stationed 24 hours.

  In this maintenance management system, when an abnormality is detected in the solar cell module 2 at a predetermined position of the photovoltaic power generation apparatus 100, the determination detector 122a generates an abnormality signal ES having information for specifying the position of the solar cell module 2. Then, the abnormal signal ES is transmitted to the slave station controller 210 via the abnormal signal transmission line SL.

  In response to the reception of the abnormality signal ES, the slave station control device 210 performs control so as to generate an abnormality signal ES ′ having position information of the detected solar cell module 2 and transmit it to the parent station control device 410. The signal ES ′ is transmitted to the master station control device 310 via the abnormal signal transmission line SL ′. In response to reception of the abnormal signal ES ′ from the slave station control device 210, the master station control device 310 displays an output for prompting the inspection of the solar cell module 2 specified by the position information of the solar cell module 2 in which abnormality is detected. Etc. The supervisor of the master station 300 that has recognized the output contacts the maintenance inspector in the management office 400 or the maintenance inspector resident in the control room 401 as shown by the one-dot chain line in the figure, and the maintenance inspector as shown in the bold line in the figure. However, inspection and maintenance are performed toward the solar cell module 2 in which the slave station 200 and the solar power generation apparatus 100 are detected to be abnormal.

  According to the abnormality detection device 1a or abnormality detection method of the second embodiment such as the maintenance management system, the abnormality of the solar cell module 2 of the solar power generation device 100 is recognized at a position away from the solar power generation device 100 such as a remote place. It is possible to urge the maintenance inspector to check, and the maintenance inspector can surely perform necessary maintenance management such as replacement and repair of the solar cell module 2 in which the abnormality is detected. In addition, by distinguishing between abnormalities to be notified and abnormalities to be transmitted to the outside, for example, by transmitting only highly urgent abnormalities so that the abnormalities can be recognized externally, priority urgent abnormalities are dealt with. Therefore, the overall efficiency of maintenance management work for the solar cell module can be improved. In addition, the second embodiment has the same effects as the first embodiment because of the configuration corresponding to the first embodiment.

[Solar Cell Module Abnormality Detection Device and Abnormality Detection Method of Third Embodiment]
A solar cell module abnormality detection device according to a third embodiment of the present invention will be described. As shown in FIG. 13, the abnormality detection device 1b of the third embodiment has the same basic configuration as that of the first embodiment, but the abnormality detection device 1b includes a part of the generated power of the entire photovoltaic power generation device. Instead of the configuration in which the solar cell module 2 is supplied via the control power line PL, and the solar cell module 2 when the solar cell module 2 corresponding to the abnormality detection device 1b generates power and the solar cell module 2 is not generating power. 2 in the current flow of the bypass diode 3 connected in parallel to the anode 2 (the anode side and the cathode side in the case of one bypass diode 3 in the illustrated example, the bypass diode 3 directly connects a plurality of diodes) If configured, the internal power IP consisting of the power obtained by reversing the polarity of the voltage from the anode side and the cathode side in the whole series connection) is detected abnormally. With the difference supplied as the control power source location 1b. That is, when the solar cell module 2 corresponding to the abnormality detection device 1b is generating power, the power is supplied as a control power source of the abnormality detection device 1b, and when this solar cell module 2 cannot generate power due to abnormality, A forward voltage generated in the bypass diode 3 by a current flowing through the bypass diode 3 connected in parallel to the solar cell module 2, that is, a bypass current of another solar cell module 2 connected in series to the solar cell module 2 is obtained. The electric power obtained by reversing the polarity is supplied as a control power source for the abnormality detection device 1b.

  A circuit configuration example of the abnormality detection device 1b to which the internal power IP is supplied as a control power supply is preferably configured as shown in FIG. An abnormality detection device 1b corresponding to one solar cell module 2 in FIG. 14 includes a non-contact current sensor 111 that is a power detection unit 11, an amplifier 112, a multiplier 113, a comparator 121 that is an abnormality detection unit 12, and a determination detector. 122, the notification unit 13 such as an LED lamp is provided as in the first embodiment. Further, the rectifier circuit 51 is connected to each of the solar cell module 2 and the bypass diode 3 in parallel, and the power output from the rectifier circuit 51 is supplied to the voltage converter 52 such as a DC-DC converter or a regulator. Via the abnormality detection device 1b. In the illustrated example, a power supply line to the power detection unit 11 is omitted.

  The rectifier circuit 51 outputs plus and minus in the voltage polarity of the input power as it is when generating power for one solar cell module 2, outputs power based on a positive DC voltage, and one solar cell module 2. When the power generation is stopped, the voltage generated at both ends of the bypass diode 3 through which the generated current from the other solar cell module 2 that generates power flows, that is, the power supplied at the opposite polarity to the voltage at the time of power generation described above is used. In this configuration, the polarity of the voltage is inverted and output. That is, the rectifier circuit 51 inverts the negative input of the bypass diode 3 to be positive and outputs it to the voltage conversion unit 52, and outputs electric power based on a positive DC voltage regardless of whether the input voltage is positive or negative. Thus, it can be used as power of a positive DC voltage for driving the abnormality detection device 1b. Note that the rectifier circuit 51 may be driven by branching a part of the input power as necessary.

  The configuration of the rectifier circuit 51 is appropriate. For example, the diode bridge circuit of FIG. 15 is preferable because it can be simplified. The rectifier circuit 51 of FIG. 15 includes diodes 511, 512, 513, and 514 having forward voltage drop characteristics considerably lower than those of the bypass diode 3. The rectifier circuit 51 includes one solar cell module 2 connected by the power trunk line ML. At the time of power generation, the power is output with the downstream positive and negative voltage polarities in the current flow of the power main line ML connecting the solar cell modules 2 connected in series as it is (see FIG. 15A). At the time of power generation stop such as an internal failure or disconnection of one solar cell module 2, the polarity of the upstream negative voltage and the downstream positive voltage in the current flow of the bypass diode 3 is reversed to output power. (See FIG. 15B).

  The voltage conversion unit 52 increases or decreases the voltage of the electric power output from the rectifier circuit 51 as necessary, matches the standard voltage of the abnormality detection device 1b, and supplies it to the abnormality detection device 1b. The voltage conversion unit 52 performs voltage conversion both when power is generated and when power generation is stopped, for example, by constant voltage control with a constant output voltage, or when power is generated by one solar cell module 2. Can be supplied to the abnormality detecting device 1b, and voltage conversion such as boosting can be performed only when the power generation of one solar cell module 2 is stopped, and then supplied to the abnormality detecting device 1b. Note that the voltage converter 52 may be driven by branching a part of the input power as necessary.

  The configuration of the voltage conversion unit 52 is appropriate. For example, a configuration as shown in FIG. 16 is preferable. The voltage conversion unit 52 in the example of FIG. 16 includes a comparator and the like, and detects and determines the input power voltage Vin and switches the voltage determination switching circuit 521, and steps down the input power voltage. A step-down DC / DC circuit 522 that outputs a voltage and a step-up DC / DC circuit 523 that steps up and outputs a voltage of the input power, and outputs power at a constant voltage Vout. .

  For example, when high voltage power is input during power generation of one solar cell module 2, the voltage determination switching circuit 521 of the voltage conversion unit 52 switches to the step-down DC / DC circuit 522, and the step-down DC / DC The electric power that has been stepped down to a constant voltage by the circuit 522 is supplied to the abnormality detection device 1b as a control power supply, and the electric power of a low voltage based on the forward voltage drop of the bypass diode 3 when power generation of one solar cell module 2 is stopped. Is input to the voltage step-up DC / DC circuit 523, and the electric power boosted by the voltage step-up DC / DC circuit 523 to a constant voltage is used as a control power source. 1b. Thereby, for example, the abnormality detection device 1b is driven at a predetermined voltage between a high voltage during power generation of one solar cell module 2 and a low voltage based on a voltage drop of the bypass diode 3 when power generation is stopped. 1b can be driven satisfactorily. Note that, from the viewpoint of power consumption reduction and compatibility with power used by boosting the voltage from a low voltage based on the voltage drop of the bypass diode 3, the abnormality detection device 1b is driven at the lowest possible voltage. preferable.

  When the abnormality detection process is performed by the solar cell module abnormality detection device 1b of the third embodiment, the power of one solar cell module 2 and the power of another solar cell module are detected, and the power of one solar cell module 2 is detected. When the result based on the comparison is outside the allowable range of the predetermined condition, the result based on the comparison is outside the allowable range of the predetermined condition. An abnormality detection process for one solar cell module 2 is performed in the same manner as in the first embodiment. For example, the same processes as in the first to third examples in the first embodiment can be performed.

  In addition, as a modification of the third embodiment, the abnormality detection device 1b is supplied with electric power at the time of power generation of one solar cell module 2 and power obtained by reversing the polarity of the voltage when power generation of the one solar cell module 2 is stopped. Is supplied as control power via the voltage conversion unit 52, the abnormality detection unit 12 acquires the voltage before being converted by the voltage conversion unit 52, and from the voltage after conversion by the voltage conversion unit 52 The generated reference voltage or the reference voltage stored in the abnormality detection unit 12 is compared with the voltage before being converted by the voltage conversion unit 52, and the acquired voltage before the conversion is an allowable range defined by the reference voltage. If it is outside, the abnormality of one solar cell module 2 is detected, and when one of the abnormality detected by this detection and the abnormality detected by the power comparison described above is detected, the one solar cell module 2 LED abnormality It may be announced in the notice of the equal.

  A circuit configuration example of this modification is shown in FIG. In the example of FIG. 17, a reference voltage generation circuit 123 and a comparator 124 are provided as components of the abnormality detection unit 12, and the reference voltage generation circuit 123 and the comparator 124 are converted by the voltage conversion unit 52. Power supplied by voltage is operated as a control power source. The reference voltage generation circuit 123 receives the converted voltage converted by the voltage conversion unit 52 such as a DC-DC converter, generates a reference voltage based on the converted voltage, and outputs the reference voltage to the comparator 124. It has become. In addition, the reference voltage is input to the comparator 124, and the voltage before being converted by the voltage conversion unit 52 after being branched from the connection line between the rectifier circuit 51 and the voltage conversion unit 52 is input. It has become.

  Then, as shown in FIG. 18, the comparator 124 acquires the voltage before being converted by the voltage conversion unit 52 (S3-1), and the reference voltage generated from the voltage after the conversion by the voltage conversion unit 52 The acquired voltage before conversion is compared, and it is determined whether the acquired voltage before conversion is outside the allowable range defined by the reference voltage, such as whether the acquired voltage before conversion is lower than the reference voltage (S3). -2) When the acquired voltage before conversion is outside the allowable range defined by the reference voltage, such as when the acquired voltage before conversion is lower than the reference voltage, the determination detector 122 sends a signal indicating that the acquired voltage is outside the allowable range. Send to. The determination detector 122 detects an abnormality of the one solar cell module 2 based on this signal (S3-3), and notifies the abnormality of the one solar cell module 2 by lighting the LED lamp (S3-4). When the acquired voltage is within the allowable range such that the acquired voltage before conversion is equal to or higher than the reference voltage, the processes of S3-1 to S3-2 are repeated.

  The method of defining the allowable range defined by the reference voltage is appropriate in addition to the example described above. For example, when the reference voltage is equal to or less than a predetermined voltage obtained by multiplying the reference voltage by a predetermined coefficient, the allowable range is not set. It is good. Alternatively, the reference voltage may be a set value that is set and stored in the storage unit or the like of the comparator 124, and this may be compared with the acquired voltage before conversion.

  According to the abnormality detection device 1b or abnormality detection method of the solar cell module of the third embodiment, the control power of the abnormality detection device 1b can be supplied internally from the corresponding solar cell module 2 and bypass diode 3. In addition, even when the solar cell module 2 is abnormal without generating power, the forward voltage generated by the current flowing through the bypass diode 3 can be used with its polarity reversed, and when the solar cell module generates power, Regardless of the time of failure, the abnormality detection device 1b can be stably operated. This also means that a part of the heat loss of the bypass diode 3 is used as a control power supply, so that the temperature rise in the vicinity of the solar cell module 2 due to the heat generated by the bypass diode 3 can be suppressed, and the accompanying reduction in power generation efficiency can be prevented. You can plan. In addition, since the control power can be generated inside the bypass diode 3 corresponding to each solar cell module 2, a long control power line PL from the external equipment to the abnormality detection device 1b becomes unnecessary, and the entire cable is made compact. be able to.

  Moreover, when providing the structure which detects the abnormality of one solar cell module 2 when the voltage before the conversion of the voltage conversion part 52 is outside an allowable range, both one solar cell module and another solar cell module are provided. Even when an abnormality cannot be detected by power comparison, an abnormality such as a decrease in generated power of one solar cell module can be detected, and the abnormality detection of the solar cell module can be more reliably performed. In addition, the third embodiment has the same effects as the first embodiment from the configuration corresponding to the first embodiment.

[Solar Cell Module Abnormality Detection Device, Abnormality Detection Method, and Abnormality Detection Equipment of Fourth Embodiment]
A solar cell module abnormality detection device according to a fourth embodiment of the present invention will be described. As shown in FIG. 19, the abnormality detection device 1 c of the fourth embodiment has the same basic configuration as that of the first embodiment, but the abnormality detection device 1 c includes a part of the total generated power of the solar power generation device. Is supplied via the control power line PL, and the internal power IP ′ composed of the power generated by the solar cell module 2 corresponding to the abnormality detection device 1c is supplied as the control power for the abnormality detection device 1c. The It is also possible to supply a part of the generated power of the solar power generation device as a control power source to the abnormality detection device 1c instead of the internal power IP ′.

  An example of the circuit of the abnormality detection device 1c is configured as shown in FIG. An abnormality detection device 1c corresponding to one solar cell module 2 in FIG. 20 includes a non-contact current sensor 111, an amplifier 112, a multiplier 113, an abnormality detection unit 12c, and a notification unit 13 such as an LED lamp. The power detection unit 11 and the notification unit 13 are the same as those in the first embodiment. The abnormality detection unit 12c includes an arithmetic control unit that performs predetermined processing, a storage unit that stores various data such as an abnormality detection program, data on an allowable range, and data on an LED lamp lighting pattern, and the like. A predetermined operation is performed in accordance with the stored abnormality detection program, and an abnormality detection unit 12c corresponding to one solar cell module 2 and an abnormality detection unit 12c corresponding to another solar cell module 2 adjacent thereto are provided. It is connected via a communication line CL.

  A voltage conversion unit 52c such as a DC-DC converter or a regulator is connected in parallel to the solar cell module 2, and the power generated by the solar cell module 2 is subjected to voltage conversion such as stepping down the voltage via the voltage conversion unit 52c. And is supplied to the abnormality detection apparatus 1c as the internal power IP ′. In the illustrated example, a power supply line to the power detection unit 11 is omitted. Further, the voltage conversion unit 52c may be driven by branching a part of the input power as necessary.

  The power of one solar cell module 2 is input to the abnormality detection unit 12c from the multiplier 113 of the power detection unit 11 of the one solar cell module 2, and the abnormality detection unit 12c corresponding to the one solar cell module 2 is While acquiring the electric power, the acquired electric power is sent to the abnormality detection unit 12c corresponding to the other solar cell modules 2 on the downstream side, the upstream side, or both the downstream side and the upstream side of the current flow of the power trunk line ML. The data is output via the communication line CL. That is, the abnormality detection unit 12c of one solar cell module 2 also has an abnormality corresponding to the other solar cell modules 2 on the upstream side, the downstream side, or both the upstream side and the downstream side of the current flow of the power trunk line ML. The corresponding power is input from the detection unit 12c via the communication line CL. In addition, about the solar cell module 2 located in the both ends of the electric power trunk line ML which connects the solar cell module 2 in series, the abnormality detection part 12c of the one solar cell module 2 located in one edge part, and the other edge part You may connect the abnormality detection part 12c of the other solar cell module 2 located in through the communication line CL.

  And the abnormality detection part 12c is the electric power input from the electric power detection part 11 of the corresponding one solar cell module 2, and the electric power detection part 12 of the other solar cell module 2 connected in series with the one solar cell module 2. Is compared with the power input from the abnormality detection unit 12c of the other solar cell module 2 via the communication line CL, and the result based on the comparison is outside the allowable range of the predetermined condition, An abnormality of one solar cell module 2 is detected, and control is performed so that the LED light of the notification unit 13 is lit in a predetermined pattern such as being constantly lit in response to the abnormality detection of the one solar cell module 2. For example, the abnormality detection unit 12c obtains a power difference by comparing the power of one solar cell module 2 with the power of another solar cell module 2, and performs a predetermined calculation on the power difference or the power difference. When the processed value is outside the allowable range of the predetermined condition that is set and stored, an abnormality of one solar cell module 2 is detected. As this predetermined condition, the same one as in the first embodiment can be used as appropriate.

  Further, the abnormality detection unit 12c corresponding to one solar cell module 2 receives power via the communication line CL from the abnormality detection unit 12c corresponding to the other solar cell module 2 on the upstream side or the downstream side. When the input power is outside the allowable range of the predetermined condition stored, or when the non-response such as no response is outside the allowable range of the predetermined condition stored, or both If this is the case, an abnormality of the other solar cell module 2 is detected, and an abnormality of one solar cell module 2 such as blinking of the LED light of the notification unit 13 is detected according to the abnormality detection of the other solar cell module 2 Control is performed so that the light is lit in a predetermined pattern different from the above case.

  When the input power is outside the allowable range of the predetermined condition, for example, the abnormality detection unit 12c stores the power threshold and the set duration, and compares the input power with the threshold to determine the input power. Is determined to be less than or equal to a threshold value, and when this state continues for a set duration or longer, the configuration is assumed to be outside the allowable range of the predetermined condition, or the abnormality detection unit 12c sets the power threshold value and the number of setting determinations. The determination interval is stored, and it is determined whether the input power is equal to or less than the threshold by comparing the input power with the threshold. If this state is equal to or greater than the number of setting determinations performed at each setting determination interval, the predetermined condition is satisfied. The abnormality detection unit 12c stores the threshold of the integrated amount of power and the set time, or the set number of times and the set interval, and the input power is set for each set time or set interval. Accumulate over the set number of times The integrated amount is acquired, and the integrated amount is compared with the threshold value to determine whether the integrated amount is equal to or less than the threshold value. When the integrated amount is equal to or less than the threshold value, the configuration is determined to be outside the allowable range of the predetermined condition. Is possible.

  Further, when non-response such as no response is outside the allowable range of the predetermined condition, for example, the abnormality detection unit 12c stores the set duration, and when the non-input of power continues for the set duration or longer, The configuration that is outside the allowable range of the predetermined condition, or the abnormality detection unit 12c stores the number of setting determinations, and if the non-input of power continues for the set duration or longer, it is out of the predetermined condition It is possible to adopt a configuration or the like.

  Furthermore, when the abnormality detection unit 12c corresponding to one solar cell module 2 detects an abnormality in the other solar cell modules 2 on both the upstream side and the downstream side in the current flow of the power trunk line ML, When the abnormality of the solar cell module 2 is detected as outside the allowable range of the predetermined condition, the one solar cell module 2 such as the LED lamp of the notification unit 13 blinks in the first pattern in response to the abnormality detection. When the abnormality of other solar cell modules 2 on the downstream side is detected as outside the allowable range of the predetermined condition, notification is made according to the detection of the abnormality. The abnormality of one solar cell module 2 and the abnormality of other solar cell modules on the upstream side, such as the LED lamp of the unit 13 blinking in a second pattern such as blinking with a slower cycle than the first pattern If a may be controlled to illuminate at a different predetermined pattern. In the case of the notification unit 13 other than the LED lamp, the notification may be made in the same different pattern.

  Thus, by showing the abnormality of the other solar cell module 2 upstream and downstream of one solar cell module 2 in a different pattern, for example, the abnormality detection device 1c corresponding to the other solar cell module 2 on the downstream side. When the LED lamp blinks in the first pattern and the LED lamp of the abnormality detection device 1c corresponding to the other solar cell module 2 on the upstream side blinks in the second pattern, the adjacent one is sandwiched between them. Even when the LED lamp of the abnormality detection device 1c of the solar cell module 2 is not lit, the abnormality of the one solar cell module 2 can be detected.

  When performing the abnormality detection process with the solar cell module abnormality detection device 1c of the fourth embodiment, for example, as shown in FIG. 21, the abnormality detection unit 12c corresponding to the one solar cell module 2 is connected to one solar cell. The power of the module 2 is detected and input (S401), and the abnormality detection unit 12c detects an abnormality corresponding to another solar cell module 2 adjacent on the upstream side or downstream side of the current flow of the power trunk line ML. It is determined whether power detected by the other solar cell module 2 is input from the unit 12c via the communication line CL (S402).

  When the power of the other solar cell module 2 is not input, it is determined whether or not the state where the power is not input is within the allowable range of the predetermined condition (S403), and the state is, for example, less than the set duration time. If the predetermined condition is within the allowable range, such as the case, the processing of S401 and S402 is continued. On the other hand, when the state where the electric power is not input is outside the allowable range of the predetermined condition, the abnormality detection unit 12c corresponding to one solar cell module 2 detects an abnormality of the other solar cell module 2 (S404). ), The LED lamp is controlled to blink in a predetermined pattern, and the abnormality of the other solar cell module 2 is notified by the blinking of the predetermined pattern of the LED lamp which is the notification unit 13 (S405).

  Moreover, when the abnormality detection unit 12c corresponding to one solar cell module 2 determines that the power of another solar cell module 2 is input, the one solar cell module 2 is the same as in the first embodiment. Detection processing and notification processing (S406) by comparing the power of the other solar cell module 2 with the power of the other solar cell module 2, that is, the comparison between the power of one solar cell module 2 and the power of the other solar cell module 2, Determination of whether the result based on the comparison is outside the allowable range of the predetermined condition, detection of an abnormality in one solar cell module 2 when the result based on the comparison is outside the allowable range of the predetermined condition, one solar cell Announce module 2 abnormality.

  As another example of the abnormality detection process by the solar cell module abnormality detection device 1c according to the fourth embodiment, the abnormality detection unit 12c corresponding to one solar cell module 2 has an upstream side and a downstream side of the current flow of the power trunk line ML. In the case of performing abnormality detection processing by determining the input of power from the abnormality detection unit 12c corresponding to the other solar cell modules 2 on both sides adjacent to each other, the abnormality corresponding to the other solar cell module 2 on the upstream side In the relationship with the detection unit 12c and the relationship with the abnormality detection unit 12c corresponding to the other downstream solar cell module 2, the processes of S401 to S406 are performed in parallel, and the abnormality of the other upstream solar cell module 2 occurs. Is detected, the abnormality of the other solar cell module 2 on the upstream side is notified by the blinking of the first pattern of the LED lamp, and the abnormality of the other solar cell module 2 on the downstream side is detected. If the will announce the other solar cell module 2 abnormality downstream flashing of the second pattern of LED lights such as flashing slower cycle than the first pattern.

  Furthermore, when the state where power is not input from both the upstream side and the other downstream side solar cell modules 2 is outside the allowable range of the predetermined condition, the abnormality detection unit 12c corresponding to one solar cell module 2 is The abnormality of both the other solar cell modules 2 on the upstream side and the downstream side is detected, and the LED lamp blinks in a third pattern such as blinking at a period earlier than both the first pattern and the second pattern. It is preferable to control and notify the abnormality of the other solar cell modules 2 on the upstream side and the downstream side by blinking the third pattern of the LED lamp which is the notification unit 13, and different notifications according to the contents of each abnormality It is good to control LED lights etc. so that it may notify by a pattern.

  Moreover, in the abnormality detection part 12c corresponding to one solar cell module 2, electric power is input from one of the other solar cell modules 2 on the upstream side and the downstream side, and no electric power is input from the other side. When an abnormality of the other solar cell module 2 that is not input is detected and an abnormality of one solar cell module 2 itself is also detected based on the power comparison, the priority order set and stored in the abnormality detection unit 12c is set. Accordingly, control may be performed so as to notify the abnormality of another solar cell module 2 by blinking of the LED lamp or the like, or control so as to notify the abnormality of one solar cell module 2 by constantly lighting the LED lamp or the like. .

  According to the fourth embodiment, when an abnormality occurs in the abnormality detecting unit corresponding to the solar cell module on the upstream side or the downstream side, and the corresponding notification unit cannot notify the abnormality, the solar on the upstream side or the downstream side due to disconnection or the like Even when the corresponding notification unit cannot notify the abnormality of the battery module, the notification unit corresponding to one solar cell module can detect and notify the abnormality of the solar cell module on the upstream side or the downstream side. Furthermore, by changing the pattern of notification of an abnormality in one solar cell module, an abnormality in the upstream solar cell module, and an abnormality in the downstream solar cell module, For example, an abnormal solar cell module sandwiched between a slow blinking LED lamp and a fast blinking LED lamp can be easily and accurately identified. In addition, the fourth embodiment has the same effects as the first embodiment from the configuration corresponding to the first embodiment.

[Modifications of Embodiment, etc.]
In addition to each invention, each embodiment, and each example, the invention disclosed in this specification is specified by changing these partial configurations to other configurations disclosed in this specification, to the extent applicable. Or, those that are specified by adding other configurations disclosed in this specification to these configurations, or those that are specified by deleting these partial configurations to the extent that partial effects can be obtained are included. To do. And the following modification etc. are also included.

  For example, in the abnormality detection devices 1b and 1c of the third and fourth embodiments, the configuration of the second embodiment may be combined to transmit the abnormality signal ES to the outside. And in addition to the abnormality detection based on the mutual comparison of the electric power of one solar cell module 2 and the other solar cell module 2, the abnormality detection based on the voltage acquired from the output of the voltage conversion part 52, the abnormality of the other solar cell module 2 Also in the case of detection, it is possible to transmit the abnormal signal ES to the outside. Also in this case, the allowable range corresponding to the abnormality notification and the allowable range corresponding to transmission of abnormality detection to the outside may be defined under different conditions.

  In addition, the circuit configurations in the first to fourth embodiments and the modifications thereof are examples, and the power detection unit 11, the abnormality detection units 12, 12a, 12c, and the notification unit 13 of the abnormality detection devices 1, 1a, 1b, and 1c. Can be configured appropriately within the scope of the present invention. In particular, when the abnormality detectors 12 and 12c or the determination detectors 122 and 122a are configured by an arithmetic control unit and a storage unit that operate according to a predetermined control program, appropriate data is stored within the scope of the present invention. It is possible to perform an appropriate processing procedure.

  In addition, the power input from the power detection unit 11 to the comparator 121 and the abnormality detection unit 12c of the abnormality detection units 12 and 12a may be only the numerical data of the power, in addition to the power itself. In response, the communication line CL can transmit power itself or power value data, and the power detection unit 11 can output power itself or power value data. Further, the power detection unit 11 may be provided with an arithmetic control unit that operates according to a predetermined program and a storage unit that stores various data as necessary, and may be configured to output power itself or power value data. Good. In addition, any appropriate sensor other than the non-contact current sensor 111 can be used as the current sensor.

  In addition, the voltage converter 52 such as the DC-DC converter of the fourth embodiment is connected in parallel to a plurality of solar cell modules 2 connected in series in addition to the configuration provided corresponding to one solar cell module 2. Then, the voltage conversion unit 52 converts the voltage so that a part of the generated power of the plurality of solar cell modules 2 connected in series is used, and the range of the input drive voltage has a certain range in the converted voltage power. You may make it distribute to each etc. of the abnormality detection apparatus 1c. According to this configuration, even when any of the plurality of solar cell modules 2 connected in series is in a power generation stop state, the operation of each of the abnormality detection devices 1c corresponding to each solar cell module 2 is ensured. be able to. It is also possible to configure the abnormality detection unit 12 and the like corresponding to each of the plurality of solar cell modules 2 as an integral unit.

  INDUSTRIAL APPLICABILITY The present invention can be used when, for example, an abnormality of a solar cell module of a solar power generation device is detected and managed.

DESCRIPTION OF SYMBOLS 1, 1a, 1b, 1c ... Abnormality detection apparatus 11 ... Electric power detection part 111 ... Non-contact current sensor 112 ... Amplifier 113 ... Multiplier 12, 12a, 12c ... Abnormality detection part 121, 124 ... Comparator 122, 122a ... Detection detection 123: Reference voltage generating circuit 13 ... Notification unit 2 ... Solar cell module 21 ... Solar cell 3 ... Bypass diode 4 ... Relay box 41 ... Branching unit 42 ... Voltage conversion unit 51 ... Rectifier circuit 511, 512, 513, 514 ... Diode 52 ... Voltage conversion unit 100 ... Solar power generation device 200 ... Slave station 210 ... Slave station control device 300 ... Master station 310 ... Master station control device 400 ... Management office 401 ... Control room ML ... Power trunk line CL ... Communication line PL ... Control power supply line SL, SL '... Abnormal signal transmission line IP, IP' ... Internal power ES, ES '... Abnormal signal

Claims (16)

A power detector for detecting the power of one solar cell module;
The power detected by the power detection unit of the other solar cell module connected in series with the one solar cell module and the power of the one solar cell module are input, and both powers are compared with each other and compared. When the result based on is outside the allowable range of the predetermined condition, an abnormality detection unit that detects an abnormality of the one solar cell module;
A notification unit for notifying abnormality of the one solar cell module;
An abnormality detection device for a solar cell module, comprising:   2. The solar cell module abnormality detection device according to claim 1, wherein the other solar cell module connected in series with the one solar cell module is a solar cell module adjacent to the one solar cell module.   The solar cell module abnormality detection device according to claim 1, wherein the notification unit includes an LED lamp. The abnormality detection unit is
Store the power difference threshold and the set duration,
Comparing the power of the one solar cell module and the power of the other solar cell module to obtain a power difference,
Comparing the acquired power difference with the threshold value to determine whether the acquired power difference is greater than or equal to the threshold value;
When the state where the acquired power difference is equal to or greater than the threshold value continues for a set duration or longer, the abnormality of the one solar cell module is detected as being outside the allowable range of the predetermined condition.
The abnormality detection apparatus for a solar cell module according to any one of claims 1 to 3. The abnormality detection unit is
Store the power difference threshold, the number of setting determinations, and the setting determination interval,
Comparing the power of the one solar cell module and the power of the other solar cell module to obtain a power difference,
Comparing the acquired power difference with the threshold value to determine whether the acquired power difference is greater than or equal to the threshold value;
When the state where the acquired power difference is equal to or greater than the threshold is equal to or greater than the number of setting determinations performed at each setting determination interval, the abnormality of the one solar cell module is detected as being outside the allowable range of the predetermined condition. ,
The abnormality detection apparatus for a solar cell module according to any one of claims 1 to 3. The abnormality detection unit is
Stores the threshold value of the integrated amount of power difference and the set time, or the set number of times and the set interval,
Comparing the power of the one solar cell module and the power of the other solar cell module to obtain a power difference,
Accumulating the acquired power difference over the set time or the set number of times for each set interval to obtain an integrated amount;
It is determined whether the acquired integrated amount is equal to or greater than the threshold value by comparing the acquired integrated amount with the threshold value.
When the acquired integrated amount is equal to or greater than the threshold, the abnormality of the one solar cell module is detected as being outside the allowable range of the predetermined condition.
The abnormality detection apparatus for a solar cell module according to any one of claims 1 to 3.   The abnormality detection unit performs transmission control of an abnormality signal of the one solar cell module to the outside in accordance with detection of an abnormality of the one solar cell module. The abnormality detection apparatus of the solar cell module described. The abnormality detection unit stores an allowable range of another predetermined condition having a wider allowable range than the allowable range of the predetermined condition,
The transmission control to the outside of the abnormal signal of the one solar cell module is performed when a result based on the comparison is outside an allowable range of the other predetermined condition. The abnormality detection apparatus of the solar cell module as described in 2.   The solar cell module abnormality detection device according to claim 1, wherein a part of the generated power of the solar power generation device having the solar cell modules connected in series is supplied as a control power source. .   The upstream side and the downstream side in the current flow of the bypass diode connected in parallel to the one solar cell module when the one solar cell module is generating power and when the one solar cell module is not generating power The abnormality detection device for a solar cell module according to any one of claims 1 to 8, wherein electric power obtained by reversing the polarity of the voltage from the side is supplied as a control power source. The power at the time of power generation of the one solar cell module and the power obtained by reversing the polarity of the voltage at the time of power generation stop of the one solar cell module are supplied as a control power source via the voltage converter,
The abnormality detection unit is
Obtain the voltage before being converted by the voltage converter,
Compare the reference voltage generated from the voltage converted by the voltage conversion unit or the reference voltage stored in the abnormality detection unit, and the voltage before being converted by the voltage conversion unit,
The abnormality detection of the solar cell module according to claim 10, wherein an abnormality of the one solar cell module is detected when the acquired voltage before the conversion is outside an allowable range defined by the reference voltage. apparatus. Corresponding to each of the solar cell modules sequentially connected in series, a power detection unit for detecting the power of the solar cell module,
Corresponding to each of the solar cell modules, the power of the corresponding solar cell module and the power of the other solar cell module are compared with each other, and this corresponds to the case where the result based on the comparison is outside the allowable range of the predetermined condition An anomaly detector for detecting an anomaly in the solar cell module;
Corresponding to each of the solar cell modules, and having a notification unit for notifying the abnormality of the corresponding solar cell module,
Each of the abnormality detection units is connected via a communication line, and obtains the required power via the communication line,
From the state where the abnormality detection unit corresponding to one solar cell module cannot acquire the power of the other solar cell module from the abnormality detection unit corresponding to the other solar cell module, or from the abnormality detection unit corresponding to the other solar cell module When the acquired state of the power of the other solar cell module is below the threshold value is outside the allowable range of the predetermined condition that is set and stored, an abnormality of the other solar cell module is detected, and the one solar cell module An abnormality detection facility for a solar cell module, wherein an anomaly of another solar cell module is notified in a pattern different from the abnormality of the one solar cell module by a notification unit corresponding to. Corresponding to each of the solar cell modules sequentially connected in series, a power detection unit for detecting the power of the solar cell module,
Corresponding to each of the solar cell modules, the power of the corresponding solar cell module and the power of the other solar cell module are compared with each other, and this corresponds to the case where the result based on the comparison is outside the allowable range of the predetermined condition An anomaly detector for detecting an anomaly in the solar cell module;
Corresponding to each of the solar cell modules, and having a notification unit for notifying the abnormality of the corresponding solar cell module,
Each of the abnormality detection units is connected via a communication line, and obtains the required power via the communication line,
The abnormality detection unit corresponding to one solar cell module cannot acquire the power of the upstream solar cell module from the abnormality detection unit corresponding to the upstream solar cell module in series connection, or the upstream solar cell module If the power of the upstream solar cell module obtained from the corresponding abnormality detection unit is below the threshold value is outside the allowable range of the preset condition stored, the abnormality of the upstream solar cell module is detected. The notification unit corresponding to the one solar cell module notifies the abnormality of the upstream solar cell module in a pattern different from the abnormality of the one solar cell module,
The state where the abnormality detection unit corresponding to the one solar cell module cannot acquire the power of the downstream solar cell module from the abnormality detection unit corresponding to the downstream solar cell module connected in series, or the downstream solar cell module Detects an abnormality in the downstream solar cell module when the downstream solar cell module power obtained from the abnormality detection unit corresponding to is outside the allowable range of the preset condition stored and set. Then, the notification unit corresponding to the one solar cell module notifies the abnormality of the downstream solar cell module in a pattern different from the abnormality of the one solar cell module and the abnormality of the upstream solar cell module. Anomaly detection equipment for solar cell modules. A first step of detecting the power of one solar cell module and detecting the power of another solar power generation module connected in series with the one solar cell module;
The detected electric power of the one solar cell module and the electric power of the other solar cell module are compared with each other, and when the result based on the comparison is outside the allowable range of the predetermined condition, A second step of detecting an anomaly;
A third step of notifying the abnormality of the one solar cell module;
An abnormality detection method for a solar cell module, comprising: Means for recognizing the power difference between the power of one solar cell module and the power of another solar cell module connected in series with the one solar cell module;
Means for comparing the power difference and detecting an abnormality of the one solar cell module when a result based on the comparison is outside an allowable range of a predetermined condition;
An abnormality detection program for a solar cell module that causes a computer to function. A solar power generation apparatus comprising the solar cell module abnormality detection device according to any one of claims 1 to 11 or the solar cell module abnormality detection equipment according to any one of claims 12 to 13.

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