CN107112797B - Monitoring device, monitoring system, and monitoring method for photovoltaic power generation equipment - Google Patents
Monitoring device, monitoring system, and monitoring method for photovoltaic power generation equipment Download PDFInfo
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 62
- 238000012806 monitoring device Methods 0.000 title claims abstract description 61
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- 238000005259 measurement Methods 0.000 claims abstract description 158
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
A monitoring device (10) is provided with a data acquisition unit (11) and a display control unit (12). A data acquisition unit (11) acquires data relating to the operation of the solar power generation device (30). And a display control unit (12) that generates display information indicating the operating state of the solar power generation device (30) in a predetermined display pattern from the data and outputs the display information. The data includes measurement data measured at a first measurement point, a second measurement point, and a third measurement point, which are a plurality of measurement points set for each of a plurality of components constituting the photovoltaic power generation device (30). The display pattern includes a figure in which elements corresponding to the components in the solar power generation device (30) in a one-to-one manner are provided in association with the positions of the components. And a display control unit (12) that reflects, on the display state of the element, monitoring data that is the result of determining whether or not the respective operating states of the components are normal based on the measurement data.
Description
Technical Field
The present invention relates to a monitoring device for a photovoltaic power generation facility, a monitoring system for a photovoltaic power generation facility, and a monitoring method for a photovoltaic power generation facility, which monitor an operating state of a photovoltaic power generation facility.
Background
Conventionally, there has been proposed a technique of monitoring an operating state of a photovoltaic power generation facility and detecting degradation of a solar cell string and a power generation failure (see, for example, patent document 1). Patent document 1 describes a technique of predicting a solar radiation amount from an output of a small-sized solar cell panel, obtaining a predicted power generation amount of a solar cell string from the predicted solar radiation amount, and comparing the power generation amount of the solar cell string with the predicted power generation amount. The solar cell string with deteriorated performance is detected by comparing the results.
(Prior art document)
(patent document)
Patent document 1: japanese patent laid-open publication No. 2013-84759
However, the technique described in patent document 1 is a technique for detecting deterioration of a solar cell string among components of a photovoltaic power generation system, and does not consider abnormality of other components of the photovoltaic power generation system. Therefore, it is not known which position among the components of the solar photovoltaic power generation system the abnormality occurs, and it takes time to perform the processing.
Disclosure of Invention
An object of the present invention is to provide a monitoring device for a photovoltaic power generation facility, a monitoring system for a photovoltaic power generation facility, and a monitoring method for a photovoltaic power generation facility, which can specify an abnormal position when an abnormality occurs in the photovoltaic power generation facility, and can consequently quickly resolve the abnormality.
The monitoring device for a solar photovoltaic power generation facility according to the present invention includes: a data acquisition unit that acquires data relating to the operation of the solar photovoltaic power generation device; and a display control unit that generates display information indicating an operating state of the solar power generation equipment from the data, and outputs the display information, wherein the display information includes measurement data measured at a plurality of measurement points set for each of a plurality of components constituting the solar power generation equipment, and the display information includes a pattern in which an element is provided in association with a position of the component, the element corresponding to the component in the solar power generation equipment on a one-to-one basis, and the display control unit reflects monitor data on a display state of the element, the monitor data being a result of whether or not the operating state of each of the components is normal, the monitor data being determined based on the measurement data.
The monitoring system for a solar photovoltaic power generation facility according to the present invention includes: a monitoring device for a solar photovoltaic power generation apparatus; and a display device that displays display information output by the monitoring device of the solar photovoltaic power generation apparatus.
The monitoring method for a solar photovoltaic power generation apparatus according to the present invention includes: obtaining data relating to operation of a solar photovoltaic power generation plant, the data including measurement data measured at a plurality of measurement points set for each of a plurality of components constituting the solar photovoltaic power generation plant; generating display information from the data, the display information representing an operating state of the photovoltaic power generation apparatus in a predetermined display pattern including a figure provided in association with a position of the component element, the element corresponding one-to-one to the component element in the photovoltaic power generation apparatus; outputting the display information; and reflecting, on a display state of the element, monitor data as a result of determining whether or not each of the operation states of the components is normal based on the measurement data.
With the configuration of the present invention, when the solar photovoltaic power generation apparatus is abnormal, the abnormal position can be specified, and as a result, the abnormality can be promptly dealt with.
Drawings
Fig. 1 shows a block diagram of an embodiment.
Fig. 2 is a configuration diagram showing an example of the solar photovoltaic power generation system used in the embodiment.
Fig. 3 is a diagram showing an example of a display pattern used in the embodiment.
Fig. 4 is a diagram showing another example of the display style used in the embodiment.
Fig. 5 is a diagram showing important parts of the display style used in the embodiment.
Fig. 6 is a diagram showing another example of the display style used in the embodiment.
Detailed Description
The monitoring device described below monitors the operating state of the photovoltaic power generation system based on data generated in the photovoltaic power generation system. Data generated in the solar photovoltaic power generation system is transmitted to the monitoring apparatus via a communication line such as the internet or a mobile communication network. Therefore, the operating state of the solar photovoltaic power generation system can be monitored at a location separate from the solar photovoltaic power generation system by using the monitoring device. In addition, in the case where the monitoring device is provided adjacent to the solar photovoltaic power generation equipment, data generated in the solar photovoltaic power generation equipment can be directly transmitted to the monitoring device, rather than being transmitted to the monitoring device via an electrical communication line.
In the embodiments described below, it is conceivable that the monitoring device is a server connected to a communication line such as the internet, and the monitoring device can collect data generated in a plurality of solar power generation facilities. That is, the monitoring device monitors the operating states of the plurality of photovoltaic power generation apparatuses.
In the present embodiment, the example in which the operating states of the plurality of solar photovoltaic power generation devices are monitored by integrating the operating states into the monitoring device has been described, but a configuration may be adopted in which the monitoring device transmits the operating states of the plurality of solar photovoltaic power generation devices to the terminal devices associated with the respective solar photovoltaic power generation devices. That is, any configuration may be adopted for monitoring the operating states of the plurality of solar photovoltaic power generation devices, such as a configuration in which the monitoring is performed collectively at one location and a configuration in which the monitoring is performed dispersedly at a plurality of locations. That is, the operating state of the solar photovoltaic power generation equipment can be monitored without depending on the position of the monitoring device as long as the monitoring device can obtain data generated by the solar photovoltaic power generation equipment through the electric communication line.
The number of sites of the solar power generation equipment monitored by 1 monitoring device is estimated to be, for example, 100 to 500 sites. However, the number of sites of the solar photovoltaic power generation system that can be monitored can be increased as necessary by increasing the number of monitoring devices or increasing the processing capacity of the monitoring devices.
(embodiment mode)
In the present embodiment, as shown in fig. 1, the monitoring device 10 receives measurement data from the photovoltaic power generation system 30. In the present embodiment, the measurement data is transmitted from the solar photovoltaic power generation system 30 to the monitoring device 10 via the electrical communication line 41. The electric communication line 41 may be a VPN (Virtual Private Network) using the internet, a mobile communication Network, a Private line, or the like.
The monitoring device 10 includes a data acquisition unit 11 that acquires measurement data, and a display control unit 12 that outputs display information for visualizing the operating state of the photovoltaic power generation system 30. The monitoring device 10 further includes a determination unit 13, and the determination unit 13 generates monitoring data as a result of determining whether or not the photovoltaic power generation system 30 is normal based on the measurement data obtained by the data obtaining unit 11.
The display control unit 12 generates display information using the measurement data and the monitor data. The monitoring device 10 constitutes a monitoring system together with the display device 20. Therefore, the display information output by the display control unit 12 is given to the display device 20, and the operating state of the photovoltaic power generation system 30 is displayed on the screen of the display device 20. That is, the monitoring system of the solar photovoltaic power generation facility according to the present embodiment includes the monitoring device 10 and the display device 20 that displays the display information output by the monitoring device 10.
The display device 20 is, for example, a terminal device that serves as a client for the monitoring device 10 that is a server, and a personal computer that communicates with the monitoring device 10 via an electric communication line 42 is generally used. The electric communication line 42 may be a VPN using the internet, a mobile communication network, a private line, or the like.
The display device 20 may be a tablet terminal, a smart phone, or a thin client (thin client). In the present embodiment, the display device 20 is generally configured to display dot matrix, but may be configured to display divided dots. Further, the display device 20 and the monitoring device 10 may be constituted by a single computer. An example of displaying the display information output by the display control unit 12 on the display device 20 will be described later.
The operating state of the photovoltaic power generation system 30 grasped by the monitoring device 10 may be transmitted to the display device 20 used by the power consumer, or may be used as a means for providing information to the consumer who receives the power generated by the photovoltaic power generation system 30.
As shown in fig. 2, the solar power generation facility 30 of the present embodiment includes a solar cell module 31 and a power conversion device 32. In the present embodiment, the photovoltaic power generation system 30 is intended for medium-to large-scale photovoltaic power generation systems 30, for example, photovoltaic power generation systems 30 having a power generation scale of about 50 to 1000kW, preferably about 1000 kW. A plurality of power conversion devices 32 are generally required for such a power generation scale. In the present embodiment, 4 power conversion devices 32 are used as an example. The monitoring device 10 of the present embodiment can be used regardless of the scale of power generation.
A predetermined number of solar cell modules 31 are connected in series to form a string 33. The photovoltaic power generation system 30 of the present embodiment includes a connection device 34 and a power collection device 35 for connecting the plurality of strings 33 in parallel. The connection devices 34 are connection boxes, a predetermined number of strings 33 are connected to the connection devices 34, the current collecting devices 35 are current collecting boxes, and the plurality of connection devices 34 are connected to the current collecting devices 35. The number of the strings 33 connected to 1 connecting device 34 is, for example, 8, and the number of the connecting devices 34 connected to 1 current collecting device 35 is, for example, 5. Further, the connection device 34 accommodates 1 circuit breaker commonly used for a predetermined number of strings 33 to be connected, and the current collector 35 accommodates a plurality of circuit breakers corresponding to the plurality of connection devices 34 to be connected in a one-to-one correspondence.
Between the strings 33 and the connection device 34, a string display 36 connected to the plurality of strings 33 is provided. The string display 36 is a device for monitoring the operation of the strings 33, and the string display 36 outputs measurement data for measuring the output of each of the plurality of connected strings 33. The string display 36 outputs measurement data for each of the plurality of strings 33. In the present embodiment, it is assumed that the string display 36 is housed in the housing of the connection device 34, but the string display 36 may be provided separately from the housing of the connection device 34. The string display 36 may output the measurement data together with the monitoring data. The monitoring data is, for example, data on disconnection or the like monitored by the string display 36.
The string display 36 is connected to, for example, 4 strings 33. In the case where the connection device 34 is connected to 8 strings 33 and the string display 36 is connected to 4 strings 33, the connection device 34 is connected to 2 string displays 36.
The current collectors 35 are connected to the power conversion devices 32 one-to-one. The photovoltaic power generation system 30 of the present embodiment includes 4 power conversion devices 32, and the 4 power conversion devices 32 are connected to the power grid 43 via the substation equipment 40. The power transformation apparatus 40 is arranged to boost the output voltage of the power conversion device 32 to conform to the voltage of the power system 43. Here, a 6600V high-voltage distribution line is assumed as the power system 43. Therefore, the power transformation device 40 for boosting the output voltage of the power conversion apparatus 32 is provided.
As described above, the power system of the solar photovoltaic power generation facility 30 is hierarchically composed of the respective constituent elements of the solar cell modules 31, the strings 33, the string display 36, the connection devices 34, the current collectors 35, the power conversion devices 32, and the power transformation facilities 40. The number of each component can be appropriately changed within the design range. For example, in the above configuration example, 4 strings 33 may be connected to the string display 36, and 8 strings 33 may be connected to the string display 36. In this case, the string display 36 is connected one-to-one with the connection device 34. The number of power conversion devices 32 connected to the substation equipment 40 may be other than 4.
The photovoltaic power generation system 30 is provided with a second measurement point P2 that measures the output of the power conversion device 32, in addition to the first measurement point P1 at which the string display 36 measures the output of the string 33. In addition, in the present embodiment, a third measurement point P3 provided at the interconnection point between the power conversion device 32 and the power grid 43 is also provided. Since the third measurement point P3 is a point of interconnection between the power grid 43 and the power conversion device 32, the output of the substation equipment 40 is measured at the third measurement point P3. The power conversion device 32 may have a function of monitoring input/output data related to input and output of the power conversion device 32 and status data related to the operating state of the power conversion device 32. The third measurement point P3 may have a function of monitoring status data related to the operating state of the substation equipment 40 in addition to measuring the output of the substation equipment 40.
Voltages and currents are measured at the first measurement point P1, the second measurement point P2, and the third measurement point P3, respectively. The voltage value and the current value are average values of selected unit time in a range of, for example, 1 second to 30 minutes. That is, the measurement data is an average value per second calculated from the measurement value per unit time. In practice, the unit time may be selected from the range of 30 seconds to 1 minute.
The measurement data measured at the first measurement point P1 by the string display 36 is transmitted to the monitoring device 10 through the communication unit 37 described later. The communication unit 37 may be integrated with the string display 36, or may be provided separately from the string display 36. In the present embodiment, a communication unit 37 is provided in addition to the string display 36. The communication unit 37 transmits the measurement data at the second measurement point P2 and the third measurement point P3 to the monitoring device 10 together with the measurement data obtained at the string display 36.
A sensor 381 is provided at the second measurement point P2, and a sensor 382 is provided at the third measurement point P3. Both sensors 381 and 382 measure current and voltage. The voltage measured at the first measurement point P1 is a direct current, and the voltages measured at the second measurement point P2 and the third measurement point P3 are alternating currents. The string display 36 measures the current at the first measurement point P1 with a sensor selected from the hall IC, the magnetoresistive element, the shunt resistor, and the like. The sensors 381 and 382 that measure the currents at the second measurement point P2 and the third measurement point P3 are selected from a current transformer, a hall IC, a magnetoresistive element, a shunt resistor, and the like.
The output of the string 33 varies depending on weather conditions, such as climate and temperature. The output of the string 33 changes with time and season after being influenced by the solar altitude. Further, the output of the string 33 varies depending on the latitude of the location where the photovoltaic power generation apparatus 30 is installed. In the case where trees, buildings, and the like exist around the solar photovoltaic power generation apparatus 30, there is a possibility that the output of the string 33 is lowered due to shadiness in a certain time period of the day.
Since the installation position of the solar power generation device 30 is known, the height of the sun can be calculated according to the date and time, and the influence of the shady weather can be obtained by actually measuring the output or performing simulation. That is, the influence of these conditions can be roughly calculated by calculation as long as the installation position of the photovoltaic power generation system 30 is known.
On the other hand, since the change in the weather condition cannot be obtained by a simple calculation, the solar photovoltaic power generation system 30 is provided with a weather meter 39 for measuring the weather condition. The weather meter 39 is provided with an insolation sensor, a temperature sensor, and a humidity sensor for determining weather such as sunny weather, rainy weather, cloudy weather, and snowfall according to the amount of insolation, and measuring the temperature and humidity. The weather determination may be performed by using a camera for capturing an image of the space above the solar cell module 31, in addition to a insolator for measuring the amount of insolation. When the camera is provided, the weather meter 39 can determine the weather from the image captured by the camera, taking into account the position and speed of the cloud above the solar cell module 31, the color tone above, and the like.
The measurement data of the first measurement point P1 measured by the string display 36, the measurement data of the second measurement point P2 measured by the sensor 381, the measurement data of the third measurement point P3 measured by the sensor 382, and the measurement data measured by the weather meter 39 are transmitted to the monitoring apparatus 10 through the communication unit 37. The monitoring device 10 determines whether or not the operating state of the photovoltaic power generation equipment 30 is normal using the measurement data received from the photovoltaic power generation equipment 30, and generates monitoring data as a result of the determination.
Here, when the solar photovoltaic power generation system 30 has a configuration in which the monitoring data is generated from the measurement data, the communication unit 37 may transmit the monitoring data to the monitoring device 10 together with the measurement data. That is, instead of transmitting the measurement data measured at the first measurement point P1, the second measurement point P2, and the third measurement point P3 to the monitoring device 10 and generating the monitoring data from the measurement data by the monitoring device 10, the solar photovoltaic power generation plant 30 may generate the monitoring data from the measurement data. Further, the monitoring data may be generated by both the monitoring device 10 and the solar photovoltaic power generation system 30. For example, in the photovoltaic power generation system 30, the power conversion device 32 may generate the monitoring data, and the monitoring device 10 may generate the monitoring data regarding the measurement data of the string display 36.
In the present embodiment, the measurement points are three types of the first measurement point P1 corresponding to the string 33, the second measurement point P2 corresponding to the connection device 34, and the third measurement point P3 corresponding to the power conversion device 32, but three types of measurement points are not essential. The measurement points are set so as to be associated with a plurality of components of the photovoltaic power generation system 30 and to be capable of measuring voltages and currents at different levels of the photovoltaic power generation system 30. In addition, when a plurality of identical components are provided in the hierarchy in which the measurement points are set, the voltage and the current can be measured for each component.
In the above example, since 8 strings 33 are connected to 1 connecting device 34, 8 strings 33 having the same constituent elements are provided for one connecting device 34 in the hierarchy corresponding to the first measurement point P1. Therefore, at the first measurement point P1, the voltages and currents of the 8 strings 33 are measured.
The determination unit 13 of the monitoring device 10 generates monitoring data using the measurement data obtained by the data obtaining unit 11 from the photovoltaic power generation system 30. The determination unit 13 compares the measurement data with the threshold value to measure whether or not the components corresponding to the first measurement point P1, the second measurement point P2, and the third measurement point P3 are normal.
As described above, since the components of the solar photovoltaic power generation system 30 are layered, the determination unit 13 may determine that the monitoring data of the measurement point corresponding to the component of the upper hierarchy level is abnormal when the monitoring data of the measurement point corresponding to the component of the lower hierarchy level indicates an abnormality. For example, when the monitoring data of the first measurement point P1 indicates an abnormality, the determination unit 13 also sets the monitoring data of the second measurement point P2 and the third measurement point P3 as an abnormality. In addition, the determination unit 13 determines that the measurement data at the third measurement point P3 is abnormal when the monitoring data at the second measurement point P2 indicates an abnormality even if the measurement data at the first measurement point P1 is normal.
When determining whether or not string 33 is normal using the measurement data at first measurement point P1, it is necessary to set a threshold value in consideration of the condition of the output change of string 33. For example, since the solar photovoltaic power generation system 30 does not generate power at night, it is impossible to determine whether or not the string 33 is normal at night. In addition, since the output of the solar photovoltaic power generation system 30 is lower than that of the string 33 in fine days even if power is generated in cloudy days, rainy days, or the like, and the output varies depending on the temperature string 33, it is impossible to determine whether the output is normal without considering these conditions.
From the above, the threshold value for determining whether or not the solar photovoltaic power generation apparatus 30 is normal may be set in accordance with the sunshine, the temperature, and the time period. The determination unit 13 may determine whether or not the solar photovoltaic power generation system 30 is normal, using a threshold set under a clear day condition, and using the output of the string 33 when a clear day is guaranteed.
Since the photovoltaic power generation system 30 includes a plurality of strings 33 having the same pattern, a representative value of outputs such as a median value and a mode can be obtained from the outputs of all the strings 33 constituting the photovoltaic power generation system 30, and a threshold value can be determined from the representative value of the outputs. Alternatively, an average value excluding the upper 10% and the lower 10% from the outputs of all the strings 33 constituting the photovoltaic power generation system 30 may be obtained, and the threshold value may be determined based on the average value. The above example is an example, and the threshold value may be determined by other methods.
The determination unit 13 compares the outputs of the strings 33 with the threshold values determined as described above, and determines whether or not each string 33 is normal. For example, the determination unit 13 compares the voltage value and the current value measured at the first measurement point P1 with their respective threshold values, and determines that the voltage value is equal to or greater than the threshold value for voltage and the current value is equal to or greater than the threshold value for current. The determination unit 13 may be configured to obtain the power value from the voltage value and the current value measured at the first measurement point P1, and determine that the power value is normal when the power value is equal to or greater than the threshold value.
In the present embodiment, the strings 33 and the connection devices 34 are layered, and a plurality of (8 in the embodiment) strings 33 are connected to the connection devices 34 in the upper hierarchy. In other words, the plurality of strings 33 connected to 1 connecting device 34 form one group. As described above, in the present embodiment, when the monitoring data obtained from the measurement data of the measurement point corresponding to the component element of the lower hierarchy level indicates an abnormality, the monitoring data of the measurement point corresponding to the component element of the upper hierarchy level is also regarded as an abnormality. That is, when the monitoring data indicating an abnormality is generated for any one of the strings 33 in the group, the monitoring data of the entire group is also regarded as an abnormality. In short, the monitoring device 10 has a function of determining whether or not the device is normal on a group-by-group basis.
Whether or not a group is normal can be determined as the logical product of the monitor data for each string 33. That is, the determination unit 13 determines that the output of the connection device 34 is normal when the monitoring data of all the strings 33 connected to the connection device 34 is normal, and determines that the output of the connection device 34 is abnormal when the monitoring data of any one of the strings 33 is abnormal. When determining that the output of the connection device 34 is abnormal, the determination unit 13 determines that the output of the power conversion device 32 in the higher hierarchy level of the connection device 34 is also abnormal, and determines that the output of the substation equipment 40 in the higher hierarchy level of the power conversion device 32 is also abnormal. That is, the lower level exceptions inherit to the upper level.
As described above, instead of generating the monitoring data from the measurement data in the monitoring device 10, the monitoring data may be generated from the measurement data in the solar photovoltaic power generation system 30. In this case, the monitoring apparatus 10 does not need the function of generating the monitoring data from the measurement data among the functions of the determination unit 13, and has only a function of inheriting the abnormality of the lower hierarchy level to the upper hierarchy level. As described above, both the solar photovoltaic power generation plant 30 and the monitoring device 10 may generate monitoring data.
The display control unit 12 also generates display information for displaying the measurement data and the monitoring data on the screen of the display device 20. The display information includes information for determining a display mode of the screen, and is configured to apply the measurement data and the monitoring data to the display mode.
The main purposes of the monitoring device 10 are to monitor whether the solar power generation equipment 30 is operating normally, and to monitor quantitative data relating to power generation of the solar power generation equipment 30. The display control unit 12 of the present embodiment basically defines two display styles, and the two display styles are switchable.
One display pattern is configured such that, as shown in fig. 3, the position where the photovoltaic power generation system 30 managed by the monitoring device 10 is installed is indicated by a symbol 51 on a map 50, and whether or not the photovoltaic power generation system 30 is operating normally is indicated by the display state of the symbol 51.
In the example shown in fig. 3, there are a plurality of locations of the solar photovoltaic power generation system 30 managed by the monitoring device 10, and the position of each location is given a reference numeral 51. The display state of the symbol 51, for example, blue (black and white) indicates normal, red (a portion of a diagonal line with a high density) indicates that abnormality occurs at the second measurement point P2, and orange (a portion of a diagonal line with a low density) indicates that abnormality occurs at the first measurement point P1, and is distinguished by color. In FIG. 3, the occurrence of an abnormality at the second measurement point P2 is denoted as "power regulator abnormality", and the occurrence of an abnormality at the first measurement point P1 is denoted as "SMU abnormality". The power regulator is a power converter 32, and the SMU (String Monitor Unit) is a String Monitor 36.
The position of the symbol 51 on the map 50 is determined by information at the time of registration of the photovoltaic power generation system 30 as a management target of the monitoring apparatus 10. That is, when the monitoring device 10 registers the photovoltaic power generation system 30, information on the geographical position is registered in addition to information on the power generation scale and the like, and the position of the symbol 51 on the map 50 is determined using this information. The color of the symbol 51 is determined based on the monitoring data, which is the result of the determination by the determination unit 13 based on the measurement data.
The display state of the symbol 51 may be indicated not only by changing the color but also by changing the shape of the symbol 51, and the display state of the symbol 51 may be changed by displaying other figures or characters on the symbol 51.
Another display pattern is configured such that, as shown in fig. 4, information relating to power generation, information relating to an operating state, and auxiliary information are displayed for a specific solar photovoltaic power generation apparatus 30. In a state where information is displayed on the screen of the display device 20 in the same manner as the display style of fig. 3, the symbol 51 corresponding to the specific point is selected, whereby the information of the display style shown in fig. 4 is displayed. In other words, the information on the power generation, the information on the operation state, and the auxiliary information are displayed on the screen of the display device 20 for the solar photovoltaic power generation equipment 30 corresponding to the selected symbol 51. Here, the selection of the symbol 51 means, for example, double-clicking the cursor on the symbol 51.
In the display pattern shown in fig. 4, in order to display information on power generation, a region 61 for displaying transition of power generation amount per time, a region 62 for displaying power generation amount in a predetermined period, and a region 63 for displaying power being generated are provided. In the example shown in fig. 4, the area for displaying the information on the operation state is an area 64 for displaying whether or not the operation state is normal, and a detailed area 65 for displaying the operation state. The area showing the auxiliary information is an area 66 displaying a still image or a moving image of the external shape of the solar photovoltaic power generation system 30 and an area 67 displaying weather information measured by the weather meter 39. The display control unit 12 may display, for example, a moving image of live broadcasting by a live camera in the area 66.
In the region 61, the power generation amount per time of the day is represented by a bar chart 611, and the power generation amount per time of the day appropriately specified is represented by a curve chart 612. The curve graph 612 may represent a representative value obtained from the results of past power generation amounts. The representative value is an average value of a past month, a median value of a past month, or the like.
In the region 62, the power generation amount of the day, the power generation amount of the month, and the power generation amount from the setting of the solar power generation device 30 are represented by numerical values. In the region 62, other information such as the power generation amount of the year may be indicated.
In the region 63, the power being generated with respect to the power generation scale (rated power generation) is represented by an annular circular graph 631. In the example shown in fig. 4, when looking at the circular graph 631, it can be seen that the output of the solar photovoltaic power generation system 30 is about 4 minutes and 3 or so with respect to the power generation scale, and the power during power generation is 38kW with respect to the power generation scale of 50kW by the numerical values shown around the circular graph 631. In the circular graph 631 of fig. 4, the electric power generated is represented by a colored portion such as blue (a white portion with a black background surrounded by a solid line).
The area 64 includes an annular element 641 having the same shape as the circular diagram 631 of the area 63. The element 641 indicates whether or not the solar photovoltaic power generation apparatus 30 is abnormal, and for example, blue indicates normal, and red indicates abnormal. Fig. 4 shows an example in which an abnormality occurs in the photovoltaic power generation system 30. In the example shown in fig. 4, the area 63 and the area 64 are designed to be substantially symmetrical on the screen of the display device 20, and the element 641 and the circular diagram 631 are formed in a ring shape having substantially the same shape. However, it may be represented by elements of different shapes that can distinguish between normal and abnormal.
The region 65 includes a pattern indicating an operation state of each component of the photovoltaic power generation system 30. In the solar photovoltaic power generation system 30, 8 strings 33 are connected to the connection device 34, and the example shown in fig. 4 is an example in which 16 strings 33 are connected to 1 connection device 34. Further, in the example shown in fig. 4, the connection devices 34 correspond to the string displays 36 one-to-one, and 16 strings 33 constituting 1 group are connected to 1 string display 36.
The pattern provided in the area 65 is a circle as a whole, and elements 651, 652, 653, and 654 corresponding to the components of the solar photovoltaic device 30 are provided in the pattern. The figure showing the photovoltaic power generation system 30 associates the levels of the constituent elements with the distances from the center of the levels.
Fig. 5 shows an enlarged view of the graph. The interconnection point at which the solar power generation device 30 and the power system 43 are connected is 1 point, and the element 654 corresponding to the third measurement point P3 is formed into 1 ring shape. The element 654 indicates the name of the component in the inner region. Here, inside the element 654, a name of "system interconnection" is given to indicate correspondence with the third measurement point P3.
The element 653 corresponding to the second measurement point P2 is provided on a ring virtually set so as to surround the outer periphery of the element 654. In the configuration example shown in fig. 2, the assumed second measurement point P2 is 4 points, and in the display pattern examples shown in fig. 4 and 5, the assumed second measurement point P2 is 5 points. Therefore, 5 elements 653 are provided on the virtually set ring, and the name part 657 is provided on the ring. In other words, the virtual ring is divided into 6 parts, 1 part becomes the name part 657, and the remaining 5 parts become the elements 653, respectively.
Similarly, element 652 is provided on a ring virtually set so as to surround the outer periphery of the ring including element 653, and element 651 is provided on a ring virtually set so as to surround the outer periphery of the ring including element 652.
The string display 36 corresponds to the connection device 34 in one-to-one correspondence with 1 power conversion device 32 and 5 connection devices 34 connected thereto, and corresponds to 1 element 653 and 5 elements 652. In other words, 25 elements 652 are provided, and 25 elements 652 and the name portion 656 are provided on 1 ring of the virtual setting.
Further, the string display 36 is connected to 16 strings 33, and the element 652 corresponds to 16 elements 651. When the angle of the element 652 is about 10 degrees when viewed from the center of the figure and 16 elements 651 are provided along the element 652, the angle of the element 651 is 1 degree or less when viewed from the center of the figure, and the visual confirmation may be lowered. Therefore, in the present embodiment, 16 elements 651 are arranged in two rows of 8 elements, and the elements 651 are provided so as to extend in a direction intersecting the outer periphery of a ring, which is a virtual ring provided with the elements 652.
In the illustrated example, in order to provide 16 elements 651 constituting 1 group, 2 parallel straight lines are virtually set, and 8 elements 651 are arranged for each straight line. Further, a center line virtually set between 2 straight lines where the elements 651 constituting 1 group are arranged passes through the center of the element 654. In other words, in the pattern in which the areas 65 are arranged, the elements 651 are arranged so that every 8 constitute a column in the general radiation direction.
Whether or not the operating state of the solar power generation device 30 is normal is represented by the display states of the elements 651, 652, 653, and 654. For example, the display control unit 12 changes the colors of the elements 651, 652, 653, and 654 corresponding to the components of the solar photovoltaic power generation system 30 according to whether or not the operating states of the components are normal. In the example shown in fig. 5, the normal color is represented by blue (black and white), and the abnormal color is represented by red (with oblique lines). Whether the working state is normal or not can be represented by continuous display and bright and dark display besides different colors. Element 654 indicates at the interconnection point whether or not an abnormality such as a power failure has occurred in power system 43.
The figures provided in the area 65, set as described above by the elements 651, 652, 653 and 654, as a whole, can be associated with a unique shape of the sun or sunflower. The elements 651, 652, 653, and 654 corresponding to the components of the solar photovoltaic power generation system 30 are provided in a plurality of virtual rings, and the virtual rings are concentric circles, so that the hierarchical structure of the components is represented in the figures. That is, when an abnormality of the operation state is indicated in a component of the upper hierarchy level, it is also indicated which component of the lower hierarchy level has an abnormality. Further, since the plurality of components are expressed as a circular figure as a whole, the area occupied by the region 65 is relatively small in the screen of the display device 20, and information is concentrated in the square region 65, so that even when other information is mixed in the screen, the information can be easily recognized.
The pattern provided in the region 65 may be a polygon such as a hexagon or an octagon as a whole, in accordance with the number of power conversion devices 32. The pattern provided in the area 65 may be a quadrangle in which the pattern shown in fig. 5 is developed and the columns of the elements 651 corresponding to the strings 33 are arranged in parallel. In the above configuration example, the display control unit 12 provides the display style to the display device 20, but the display style may be displayed using the display device 20 of a segment type or the like in which the display style is not variable.
Further, since the output of the solar photovoltaic power generation system 30 is affected by the amount of solar radiation, the monitoring device 10 can obtain weather information through an electric communication line such as the internet, and as shown in fig. 6, can display the approximate position of a cloud 52 obtained as weather information on the same map 50 as that of fig. 3. Indicating the position of the cloud 52, it is possible to obtain a criterion for determining whether the power is reduced due to a failure or due to climate when the output of the solar photovoltaic power generation apparatus 30 is reduced.
Fig. 6 shows the approximate position of the cloud 52, and if information on the climate, the air temperature, and the humidity is obtained from the weather meter 39 installed in the photovoltaic power generation system 30 and is also displayed on a map, there is a possibility that the cause of the output fluctuation of the photovoltaic power generation system 30 is estimated. That is, by providing the weather information that affects the amount of power generated by the photovoltaic power generation system 30 so as to overlap the map 50, it can be intuitively confirmed whether the power reduction at each location of the photovoltaic power generation system 30 is caused by a failure or by the influence of weather or the like.
In the above-described configuration example, the current collector 35 is used, and the power converter 32 and the connecting device 34 may be connected to each other. When the power conversion device 32 is connected to the plurality of connection devices 34, the power conversion device 32 may have a structure corresponding to the current collector 35.
As described above, the monitoring device 10 for a photovoltaic power generation facility according to the present embodiment includes the data acquisition unit 11 and the display control unit 12. The data obtaining unit 11 obtains data related to the operation of the photovoltaic power generation system 30. The display control unit 12 generates display information for displaying the operating state of the photovoltaic power generation system 30 in a predetermined display pattern based on the data, and outputs the display information. The data includes measurement data measured at a plurality of measurement points (a first measurement point P1, a second measurement point P2, and a third measurement point P3) set for each of a plurality of components constituting the photovoltaic power generation system 30. The display style includes a graphic in which elements (651, 652, 653, and 654) corresponding to the components in the solar photovoltaic device 30 in a one-to-one manner are provided in association with the positions of the components. The display control unit 12 reflects the display states of the elements (651, 652, 653, and 654) with the monitoring data, which is the result of determining whether or not the respective operation states of the components are normal based on the measurement data.
With this configuration, whether or not the respective operation states of the components are normal is indicated by the display states of the elements (651, 652, 653, and 654) corresponding to the components in a one-to-one correspondence, and the type of the component having the abnormality can be visually recognized. Further, since the elements (651, 652, 653, and 654) are provided in association with the positions of the constituent elements, when there is an abnormality in the solar photovoltaic power generation apparatus 30, the abnormal position can be specified by the positions of the elements (651, 652, 653, and 654). That is, in the case where there is an abnormality in the solar photovoltaic power generation apparatus 30, it becomes easy to specify the position where there is an abnormality by displaying, so that the user can quickly resolve the abnormality.
In the present embodiment, the photovoltaic power generation facility 30 includes, as components, a plurality of strings 33, a plurality of connection devices 34, and a power conversion device 32. The string 33 is constituted by the solar cell modules 31. The connection device 34 groups outputs of the plurality of strings 33 by a predetermined number. The power converter 32 converts the output from the connection device 34 into an alternating current. The measurement points include a first measurement point P1 that measures the output of the measurement string 33, and a second measurement point P2 that measures the output of the power conversion device 32.
With this configuration, it is possible to determine whether or not the strings 33 and the power conversion devices 32 among the components of the photovoltaic power generation system 30 are operating normally. That is, in the case where an abnormality occurs in the solar power generation device 30, it can be easily determined whether it is the cause of the string 33 or the cause of the power conversion device 32.
In the present embodiment, the solar photovoltaic power generation system 30 is connected to the power grid 43. The measurement point is further provided with a third measurement point P3, and this third measurement point P3 is set at the interconnection point of the power conversion device 32 and the electric power system 43.
With this configuration, it is possible to determine whether or not the interconnection point between the photovoltaic power generation system 30 and the power grid 43 is normal, and for example, it is possible to detect a power failure state of the power grid 43.
The figure includes, as elements, a plurality of first elements 651 corresponding one-to-one to the strings 33, a second element 653 corresponding to the power conversion device 32, and a third element 654 corresponding to an interconnection point. The first elements 651 corresponding to the strings 33 constituting the group are formed as columns. A second element 653 corresponding to the power conversion device 32 connected to the string 33 is provided on one end side of the column of the first element 651. The third element 654 is disposed on the opposite side of the first element 651 across the second element 653.
With this configuration, since the hierarchical structure among the components of the solar photovoltaic power generation system 30 is reflected in the arrangement of the elements corresponding to the components, when an abnormality occurs in a component, the position of the component in which the abnormality occurs can be easily specified.
In the figure, the first element 651, the second element 653, and the third element 654 may be respectively disposed on virtually set rings. The ring in which the second element 653 is provided surrounds the ring in which the third element 654 is provided, and the ring in which the first element 651 is provided surrounds the ring in which the second element 653 is provided.
With this configuration, the components of the solar photovoltaic power generation system 30 are represented as a whole by a ring-shaped pattern, and are associated with different types of components according to the distance from the center of the pattern. Therefore, the hierarchical structure of the components of the photovoltaic power generation system 30 is represented by a ring-shaped graph, and the user can easily recognize the position of the component having an abnormality. Further, the graphic is annular as a whole, and the sun or the sunflower can be imagined to look flat and close to the human body, and many components are collected by the annular graphic, so that the degree of freedom of installation on the screen when displayed on the display device 20 is increased. Further, elements (651, 652, 653, and 654) corresponding to a large number of components can be compactly arranged by this graphic.
The display style may be specified such that a symbol 51 indicating the solar power generation device 30 is provided on the map 50 in correspondence with the position where the solar power generation device 30 is provided. In this case, the display control unit 12 can reflect the result of whether or not the operating state of the photovoltaic power generation system 30 is normal, which is determined based on the measurement data, to the display state of the symbol 51.
With this configuration, the geographical position of the photovoltaic power generation system 30 on the map 50 can be confirmed on the map 50, and the photovoltaic power generation system 30 having an abnormality can be immediately known when the operating states of the plurality of photovoltaic power generation systems 30 are monitored. That is, since the solar photovoltaic power generation system 30 in which an abnormality occurs is different from the solar photovoltaic power generation system 30 in which the display state of the symbol 51 is normal, if the symbol 51 in which the display state is different is present on the map 50, it can be recognized that the solar photovoltaic power generation system 30 is abnormal. In addition, the operating states of the plurality of solar photovoltaic power generation devices 30 can be displayed simultaneously within the range of the map 50 that can be displayed on one screen of the display device 20. In other words, when the user constantly monitors the operating state of the photovoltaic power generation devices 30, the plurality of photovoltaic power generation devices 30 can be monitored without switching the screen, scrolling the screen, or the like. Further, since the position of the solar photovoltaic power generation system 30 having an abnormality is displayed on the map 50, when a site confirmation work or a repair work is required, it is possible to promptly give an instruction to a service site.
The display pattern may be determined such that weather information that affects the amount of power generated by the photovoltaic power generation system 30 is superimposed on the map 50.
With this configuration, the weather information is superimposed on the map 50, and it is possible to identify whether the cause of the decrease in the amount of power generation is an abnormality in the operating state of the photovoltaic power generation system 30 or a weather condition such as a climate.
The general or specific aspects of the present invention include one or a combination of a plurality of apparatuses, systems, methods, integrated circuits, computer programs, computer-readable recording media, and the like.
A monitoring method for a solar photovoltaic power generation system according to an aspect of the present invention includes: obtaining data relating to operation of a solar photovoltaic power generation plant, the data including measurement data measured at a plurality of measurement points set for each of a plurality of components constituting the solar photovoltaic power generation plant; generating display information from the data, the display information representing an operating state of the photovoltaic power generation apparatus in a predetermined display pattern including a figure provided in association with a position of the component element, the element corresponding one-to-one to the component element in the photovoltaic power generation apparatus; outputting the display information; and reflecting, on a display state of the element, monitor data as a result of determining whether or not each of the operation states of the components is normal based on the measurement data.
Further, a program according to an aspect of the present invention causes a computer to execute the steps of: obtaining data relating to operation of a solar photovoltaic power generation plant, the data including measurement data measured at a plurality of measurement points set for each of a plurality of components constituting the solar photovoltaic power generation plant; generating display information from the data, the display information representing an operating state of the photovoltaic power generation apparatus in a predetermined display pattern including a figure provided in association with a position of the component element, the element corresponding one-to-one to the component element in the photovoltaic power generation apparatus; outputting the display information; and reflecting, on a display state of the element, monitor data as a result of determining whether or not each of the operation states of the components is normal based on the measurement data.
The above embodiments are examples of the present invention. Therefore, the present invention is not limited to the above embodiment, and various modifications may be made in accordance with design or the like without departing from the scope of the technical idea of the present invention.
The present invention is not limited to the above-described embodiments, and various modifications and changes can be made without departing from the scope of the present invention.
Description of the symbols
10 monitoring device
11 data obtaining part
12 display control part
20 display device
30 solar photovoltaic power generation device
31 solar cell module
32 power conversion device
33 bunch
34 connecting device
43 electric power system
50 map
51 symbol
651 element (first element)
652 element
653 element (second element)
654 element (third element)
P1 first measurement Point
P2 second measurement Point
P3 third measurement Point
Claims (6)
1. A monitoring device for a solar power generation facility,
the monitoring device for a photovoltaic power generation facility includes:
a data acquisition unit that acquires data relating to the operation of the solar photovoltaic power generation device; and
a display control unit that generates display information representing an operating state of the photovoltaic power generation device in a predetermined display pattern based on the data and outputs the display information,
the data includes measurement data measured at a plurality of measurement points set for each of a plurality of components constituting the photovoltaic power generation system,
the display pattern includes a figure in which elements corresponding one-to-one to the components in the solar photovoltaic power generation apparatus are provided in association with positions of the components,
the display control unit reflects monitor data, which is a result of determining whether or not the respective operation states of the components are normal based on the measurement data, on the display states of the elements,
the photovoltaic power generation facility includes, as the components:
a plurality of strings composed of solar cell modules;
a plurality of connection means for grouping outputs of the strings into one group by a predetermined number; and
a power conversion device that converts an output from the connection device into an alternating current,
the measurement points include a first measurement point for measuring an output of the string and a second measurement point for measuring an output of the power conversion device,
the solar power generation device is connected with a power system,
the measurement point further includes a third measurement point set at an interconnection point of the power conversion device and the power system,
the graphic includes, as the elements:
a first element corresponding one-to-one to the string;
a second element corresponding to the power conversion apparatus; and
a third element corresponding to the interconnect point,
the first elements corresponding to the strings constituting the group are formed as columns,
the second element is provided on one end side of the column of the first element, the second element corresponding to the power conversion device connected to the string,
the third element is provided on the opposite side of the first element with the second element interposed therebetween.
2. The monitoring device of a solar power generation apparatus according to claim 1,
in the case of the said pattern, the pattern is,
the first element and the second element and the third element are respectively arranged on a virtually set ring,
the ring in which the second element is provided surrounds the ring in which the third element is provided, and the ring in which the first element is provided surrounds the ring in which the second element is provided.
3. The monitoring device of a solar power generation apparatus according to claim 1 or 2,
the display pattern is determined such that a symbol representing the solar photovoltaic power generation device is provided on a map in accordance with a position at which the solar photovoltaic power generation device is provided,
the display control unit reflects a result of whether or not the operating state of the photovoltaic power generation device is normal, which is determined based on the measurement data, to a display state of the symbol.
4. The monitoring device of a solar power generation apparatus according to claim 3,
the display pattern is determined such that weather information, which is information that affects the amount of power generated by the photovoltaic power generation system, is superimposed on the map.
5. A monitoring system for a photovoltaic power generation facility, comprising:
a monitoring device of the solar photovoltaic power generation apparatus according to any one of claims 1 to 4; and
and a display device that displays display information output by the monitoring device of the solar photovoltaic power generation apparatus.
6. A monitoring method of a solar power generation device, comprising:
obtaining data relating to operation of a solar photovoltaic power generation plant, the data including measurement data measured at a plurality of measurement points set for each of a plurality of components constituting the solar photovoltaic power generation plant;
generating display information from the data, the display information representing an operating state of the photovoltaic power generation apparatus in a predetermined display pattern including a figure provided in association with a position of the component element, the element corresponding one-to-one to the component element in the photovoltaic power generation apparatus;
outputting the display information; and
reflecting, on a display state of the element, monitor data as a result of determining whether or not each of the operation states of the components is normal based on the measurement data,
the photovoltaic power generation facility includes, as the components:
a plurality of strings composed of solar cell modules;
a plurality of connection means for grouping outputs of the strings into one group by a predetermined number; and
a power conversion device that converts an output from the connection device into an alternating current,
the measurement points include a first measurement point for measuring an output of the string and a second measurement point for measuring an output of the power conversion device,
the solar power generation device is connected with a power system,
the measurement point further includes a third measurement point set at an interconnection point of the power conversion device and the power system,
the graphic includes, as the elements:
a first element corresponding one-to-one to the string;
a second element corresponding to the power conversion apparatus; and
a third element corresponding to the interconnect point,
the first elements corresponding to the strings constituting the group are formed as columns,
the second element is provided on one end side of the column of the first element, the second element corresponding to the power conversion device connected to the string,
the third element is provided on the opposite side of the first element with the second element interposed therebetween.
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| JP2015-003968 | 2015-01-13 | ||
| JP2015003968 | 2015-01-13 | ||
| PCT/JP2015/006423 WO2016113823A1 (en) | 2015-01-13 | 2015-12-24 | Photovoltaic facility monitoring device, photovoltaic facility monitoring system, and photovoltaic facility monitoring method |
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| JP6590328B2 (en) * | 2016-05-26 | 2019-10-16 | パナソニックＩｐマネジメント株式会社 | Method, server, program, and terminal for generating information on power generation amount of photovoltaic power generation apparatus |
| CN107257360A (en) * | 2017-05-22 | 2017-10-17 | 南京唐模电气科技有限公司 | Photovoltaic monitoring and display system and its implementation with advertisement insertion function |
| KR101980741B1 (en) * | 2018-01-16 | 2019-05-21 | 강문식 | A method, system and program for simulaiton of solar energy generator |
| JP7187851B2 (en) * | 2018-07-09 | 2022-12-13 | 中国電力株式会社 | Regulated area management system |
| CN109828146B (en) * | 2018-11-22 | 2022-03-22 | 常州天正工业发展股份有限公司 | Method for judging equipment working condition through equipment electrical parameter AD sampling |
| CN111831759A (en) * | 2019-04-15 | 2020-10-27 | 阿里巴巴集团控股有限公司 | Data processing method, device, equipment and storage medium |
| JP6651210B1 (en) * | 2019-07-25 | 2020-02-19 | 株式会社Ａｎｅ | Solar power facility monitoring system |
| KR102489973B1 (en) * | 2021-11-15 | 2023-01-19 | 박기주 | Apparatus and method for operating and maintaining solar power system using cyber character |
| KR102522367B1 (en) * | 2022-07-01 | 2023-04-18 | 주식회사 지구루 | Method and System for Investment Valuation Forecasting of Solar Power Generation Apparatus |
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| WO2016113823A1 (en) | 2016-07-21 |
| CN107112797A (en) | 2017-08-29 |
| JP6369765B2 (en) | 2018-08-08 |
| JPWO2016113823A1 (en) | 2017-08-31 |
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