Cubicle monitoring system

Abstract

To install a load-driving storage battery in a cubicle to make it possible to continue remote monitoring of the cubicle even during a prolonged power failure, and utilize the storage battery as a power source in an emergency.SOLUTION: A cubicle 1 has a cubicle interior monitoring device 10 that transmits status information to a management server 3, and a storage battery 71. The cubicle interior monitoring device 10 is provided with a monitoring control device 23 that controls charging / discharging of the storage battery 71, and communicates with the management server 3. The management server 3 obtains reception power information supplied from a system to the cubicle 1, and notifies the monitoring control device 23 of the same. The monitoring control device 23 receives the reception power information from the management server 3 to control the charging / discharging of the storage battery 71 so that the reception power does not exceed a predetermined upper limit value, and, if the system falls into a power failure, allows a power source of the cubicle interior monitoring device 10 to be supplied from the storage battery 71 to keep a function of the cubicle interior monitoring device 10.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a cubicle monitoring system for remotely monitoring a cubicle that receives high-voltage power from a system.

Background Art

[0002] In order to reduce electricity bills, a configuration in which a storage battery is arranged in power receiving equipment has become widespread. The installed storage battery is charged during a time period when the power consumption such as night-time power is low, and when the received power is about to exceed the contract power, it is discharged, which is effectively used for suppressing peak power (for example, see Patent Document 1).

[0003] On the other hand, there is a cubicle monitoring system for remotely monitoring the state of cubicle-type high-voltage power receiving equipment (hereinafter referred to as a cubicle). In this system, when the power supply of the monitoring device disappears when a power outage occurs on the system side, the monitoring system determines that a system abnormality has occurred and remote monitoring becomes impossible. In such a case, it was necessary to rush to the site to deal with it. In order to prevent this problem, a backup power supply for the monitoring system may be provided or an uninterruptible power supply (UPS) may be used. However, when the power outage becomes long-term, the storage capacity of these also runs out, so the same measures are required.

[0004] In the case of a storage battery provided for the purpose of ensuring power supply during a large-scale power outage such as a disaster, it is necessary to always ensure a large storage capacity. For example, it is used so that the remaining storage amount does not fall below 30% of full charge at all times.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] As described above, in the conventional cubicle monitoring system, when the power supply of the monitoring device is lost when a power outage occurs on the system side, various preparations for investigating the cause of the power outage have to be made and one has to rush to the site. In addition, although the backup power supply of the monitoring system was sometimes used, when the power outage lasted for a long time, the power supply was still lost and the monitoring device stopped operating. In addition, for battery equipment for ensuring power supply in case of emergency such as disasters during a power outage, it is necessary to always ensure a certain amount of remaining charge, so the battery capacity could not be fully utilized during normal times. Furthermore, since such battery equipment is installed separately from the cubicle, separate installation locations are required and wiring work for connecting the two is also necessary, which has problems such as increasing construction costs and becoming an obstacle to installation.

[0007] Therefore, in view of such problems, the present invention aims to provide a cubicle monitoring system in which a storage battery is installed in the cubicle as a power source for driving a load during a power outage, remote monitoring of the cubicle can be continued even if the power outage lasts for a long time, and in addition, the storage battery can be utilized as a power source in case of emergency without setting a large remaining charge during normal times.

Means for Solving the Problems

[0008] In order to solve the above problems, the invention according to claim 1 is a cubicle monitoring system having a cubicle that houses high-voltage power receiving equipment for receiving high-voltage power of a system and supplies the power converted to low voltage to a load, and a management server disposed on the cloud for accumulating and managing the state information of the cubicle. The cubicle has a storage battery for supplying power to at least a part of the load when the system is powered off, a monitoring device inside the cubicle for transmitting state information to the management server, and a power conditioner for converting the DC power generated by the solar power generation device and the DC power stored in the storage battery into AC power and supplying it to the load, and for converting the AC power from the system into DC power and supplying it to the storage battery. The monitoring device inside the cubicle includes data collection means for measuring and collecting physical data including voltage values and current values at a predetermined part of the cubicle, which is part of the state information, and a monitoring control device for controlling the charge and discharge of the storage battery and communicating with the management server. The management server has a received power information obtaining section for obtaining received power information from a watt-hour meter that measures the received power supplied from the system to the cubicle, a weather information obtaining section for obtaining weather forecast information of the area where the cubicle is installed, and a power generation prediction section for predicting the power generation of the solar power generation device supplied to the cubicle from the obtained weather forecast information. On the other hand, the monitoring control device has a storage battery control section for obtaining received power information from the management server and controlling the charge and discharge of the storage battery so that the received power does not exceed a predetermined upper limit value, and a power supply control section for supplying the power of the monitoring device inside the cubicle from the storage battery when the system is powered off to maintain the function of the monitoring device inside the cubicle. The monitoring control device is characterized in that it obtains prediction information on the power generation of the solar power generation device from the management server and sets a lower limit value of the remaining charge of the storage battery based on the prediction information. Power situation According to this configuration, when the system is powered off, the monitoring device inside the cubicle is operated using the storage battery as a power source, so that the information of the cubicle can be transmitted to the monitoring server even when the system is powered off. Also, since the capacity of the storage battery is also an emergency power source for the load, the capacity is relatively large, and if restrictions on the load supplied with power are implemented, it is possible to maintain the operation of the monitoring control device for a long time. Therefore, remote monitoring of the cubicle can be continuously carried out, and the situation where the administrator rushes to the site every time a power outage occurs can be reduced. ​ In addition, since the storage battery is controlled so that the received power does not exceed a predetermined upper limit value, it is possible to reduce the power charge. Also, since the storage battery is arranged in the cubicle, the connection between the power distribution equipment in the cubicle and the storage battery can be easily implemented, and the installation space can be minimized. Furthermore, since the lower limit value of the remaining charge of the storage battery is set according to the weather conditions, for example, when it is not possible to expect a sufficient amount of power generation for some time due to continuous rainy days, control is carried out to increase the lower limit value to prepare for emergencies, or if sunny days continue, the lower limit value can be set small to control the utilization of the stored power, and the storage battery can be effectively utilized.

[0009] The invention according to claim 2 is A cubicle monitoring system having a cubicle that houses high-voltage power receiving equipment for receiving high-voltage power of a system and supplies the power converted to low voltage to a load, and a management server arranged on the cloud for storing and managing the status information of the cubicle. The cubicle has a storage battery for supplying power to at least a part of the load when the system is powered off, and a monitoring device inside the cubicle for transmitting status information to the management server. The monitoring device inside the cubicle includes data collection means for measuring and collecting physical data including voltage values and current values at a predetermined part of the cubicle, which is a part of the status information, and a monitoring control device for controlling the charge and discharge of the storage battery and communicating with the management server. The management server has a received power information obtaining unit for obtaining received power information from a watt-hour meter that measures the received power supplied from the system to the cubicle. On the other hand, the monitoring control device has a storage battery control unit for obtaining received power information from the management server and controlling the charge and discharge of the storage battery so that the received power does not exceed a predetermined upper limit value, and a power supply control unit for supplying the power of the monitoring device inside the cubicle from the storage battery when the system is powered off to maintain the function of the monitoring device inside the cubicle. Further, the status information transmitted by the monitoring control device to the management server includes the power consumption information supplied to the load. The management server has a load power information storage unit for storing the received power consumption information, and a load power prediction unit for predicting the power consumption of the load from the current time to a predetermined time in the future based on the past power consumption information, and transmitting the prediction information of the power consumption to the monitoring control device. The monitoring control device is characterized in that it sets the lower limit value of the remaining charge of the storage battery based on the prediction information. According to this configuration, when the system is powered off, since the monitoring device inside the cubicle is operated using the storage battery as a power source, the information of the cubicle can be transmitted to the monitoring server even when the system is powered off. Also, since the capacity of the storage battery is also an emergency power source for the load, the capacity is relatively large. By implementing restrictions on the load supplied with power, etc., it becomes possible to maintain the operation of the monitoring control device for a long time. Therefore, remote monitoring of the cubicle can be continuously carried out, and the situation where the administrator rushes to the site every time a power outage occurs can be reduced. In addition, since the storage battery is controlled so that the received power does not exceed a predetermined upper limit value, it is possible to reduce the electricity bill. Also, since the storage battery is arranged inside the cubicle, the connection between the power distribution equipment inside the cubicle and the storage battery can be easily implemented, and the installation space can be minimized. Furthermore, since the power supplied to the load is predicted to set the lower limit value of the remaining charge amount, the storage battery can be effectively utilized.

[0010] The invention according to claim 3 is as set forth in claim 1 In the configuration described above, the status information transmitted by the monitoring and control device to the management server includes the power consumption information supplied to the load. The management server has a load power information storage unit that stores the received power consumption information, and a load power prediction unit that predicts the power consumption of the load from the current time to a predetermined time in the future based on the past power consumption information, and transmits the predicted information of the power consumption to the monitoring and control device. The monitoring and control device is characterized in that it sets the lower limit value of the remaining charge of the storage battery based on the predicted information. According to this configuration, since the power supplied to the load is predicted and the lower limit value of the remaining charge is set, the storage battery can be effectively utilized.

Advantages of the Invention

[0011] According to the present invention, when a power outage occurs in the power grid, since the storage battery is used as a power source to operate the monitoring device in the cubicle, the information of the cubicle can be transmitted to the monitoring server even during a power outage. Also, since the capacity of the storage battery is relatively large as it is also an emergency power source for the load, by implementing restrictions on the load supplied with power, etc., it is possible to maintain the operation of the monitoring and control device for a long time. Therefore, remote monitoring of the cubicle can be continuously carried out, and the situation where the administrator rushes to the site every time a power outage occurs can be reduced. In addition, since the storage battery is controlled so that the received power does not exceed a predetermined upper limit value, it is possible to reduce the electricity bill. Also, since the storage battery is arranged inside the cubicle, the connection between the power distribution equipment inside the cubicle and the storage battery can be easily carried out, and the installation space can be minimized.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Embodiments for Carrying Out the Invention

[0013] Hereinafter, embodiments embodying the present invention will be described in detail with reference to the drawings. FIG. 1 is a configuration diagram showing an example of a cubicle monitoring system according to the present invention. The cubicle monitoring system includes a cubicle 1 housing high-voltage power receiving equipment, a watt-hour meter 2, a management server 3 for managing the cubicle, a weather server 4 for providing weather information, and the like. The management server 3 is arranged on the cloud and is connected to the cubicle 1, the watt-hour meter 2, and the weather server 4 via a communication network N.

[0014] The weather server 4 is a data server managed by the Japan Meteorological Agency or a weather business operator or the like and provides weather information. Information such as the weather, temperature, wind direction, and sunshine rate in each area obtained by dividing the whole of Japan into a plurality of areas is generally provided.

[0015] In cubicle 1, in addition to high-voltage power receiving equipment, a monitoring device 10 inside the cubicle is accommodated which communicates with the management server 3 to transmit the status information of cubicle 1 to the management server 3 and obtain control information. The high-voltage power receiving equipment is composed of a transformer that converts high voltage received from the grid into low voltage, a high-voltage AC load switch, a circuit breaker, a vacuum circuit breaker, a current-limiting fuse, a high-voltage shunt capacitor, a circuit breaker for wiring, an instrument transformer, etc., and these are accommodated (none are shown). Also, a battery device 7 for supplying power to a load (not shown) during a power outage is accommodated, and a solar power generation device 8 (Figure 2) is connected to cubicle 1.

[0016] As shown in Figure 2, the battery device 7 includes a storage battery 71, a power conditioner (hereinafter referred to as PCS) 72 for converting DC power into AC power and feeding it back to the grid or supplying it to the load, a storage unit 73 for storing the lower limit value and the like to be described later, a communication unit 75 for communicating with the monitoring and control device 23, and the like. PCS 72 has a function of controlling the charge and discharge of the storage battery 71, and controls the remaining charge so as not to fall below the lower limit value set by the monitoring and control device 23. Also, it performs AC conversion of the power generated by the solar power generation device 8, supplies the converted AC power to the load or feeds it back to the grid side. Furthermore, it controls the conversion of AC power from the grid into DC and supplies it to the storage battery 71.

[0017] In addition, power received from the grid is supplied to the load, and the power generated by the solar power generation device 8 and the DC power stored in the storage battery 71 are converted into AC and supplied.

[0018] The power meter 2 is a smart meter having a function of transmitting externally the received power information received from the system, and transmits the received power information to the management server 3 via a communication device 26 connected to the communication network N. Upon receiving this information, the management server 3 notifies the monitoring control device 23 so that the received power does not exceed the set upper limit value. The upper limit value is the maximum demand value or a power value set lower than that, and is set by the consumer of the received power for the purpose of preventing an increase in the electricity bill or for the purpose of reduction. Note that the communication device 26 may be integrated with the power meter 2.

[0019] FIG. 2 shows a block diagram of the cubicle internal monitoring device 10. As shown in FIG. 2, the cubicle internal monitoring device 10 includes a data collection device (data collection means) 21 that acquires the state information of the cubicle 1, a contact information input device (contact information collection means) 22, and a monitoring control device (transmission control means) 23. The data collection device 21 has a first measurement device 21a that collects physical data related to power and a second measurement device 21b that collects physical data related to temperature, and collects physical data (state information) such as the voltage, current, and temperature of the equipment of the circuit disposed between predetermined equipment of the high-voltage power receiving facility.

[0020] Specifically, the first measurement device 21a includes an input unit 51 that inputs measurement information, a first measurement device CPU 52 that controls the measurement and also serves as a determination unit that determines the normality / abnormality of the measurement value, a storage unit (threshold value storage unit) 53 that stores a threshold value for determining the normality / abnormality of each measurement value, a communication unit 54 that communicates with the monitoring control device 23, and the like. Connected to the input unit 51 are a plurality of voltage measurement devices, current measurement devices, leakage current measurement devices, etc. (not shown), and the high-voltage side voltage information M1, current information M2, low-voltage side voltage information M3, current information M4, transformer leakage current information M5, etc. are input. The first measurement device CPU 52 controls the first measurement device 21a and also serves as a power factor calculation unit, and calculates and outputs the power and power factor including the power consumption information of the load.

[0021] The second measuring device 21b includes an input unit 56 for inputting temperature information, a second measuring device CPU 57 that controls the measurement and determines whether the measured value is normal or abnormal as a determination unit, a storage unit (threshold value storage unit) 58 that stores threshold values for determining whether each measured value is normal or abnormal, a communication unit 59 that communicates with the monitoring control device 23, and the like. Here, it is configured to communicate with the monitoring control device 23 via the first measuring device 21a. A thermometer (not shown) is connected to the input unit 56, and the oil temperature information T1 of the transformer, the temperature information T2 inside the cubicle 1, and the like are input. The second measuring device CPU 57 controls the second measuring device 21b.

[0022] The contact information input device 22 collects various contact information (status information) in the cubicle 1 such as interruption information and alarm information. Specifically, the contact information input device 22 includes an input unit 61 for inputting contact information, a contact information input device CPU 62 that converts the input information into predetermined identification data, a communication unit 63 that transmits the contact information obtained by communicating with the monitoring control device 23, and the like. Here, it is configured to communicate with the monitoring control device 23 via the first measuring device 21a. Contact information such as the interruption information S1 of the circuit breaker, vacuum circuit breaker, and wiring breaker, fuse information S2 such as the fuse melting information of the current-limiting fuse, further alarm information S3 of the insulation monitoring device 64, and alarm information S4 of the leakage fire alarm 65 is input to the input unit 61. When contact information is input, the contact information input device CPU 62 outputs it to the monitoring control device 23.

[0023] The monitoring control device 23 includes a first communication IF 41 that communicates with the first measuring device 21a and the battery device 7, a storage unit 42 that stores the obtained data, upper limit values, etc., a monitoring control device CPU 43 that controls the monitoring control device 23, a second communication IF 44 that communicates with the management server 3, and the like. Furthermore, the first communication IF41 of the monitoring and control device 23 may be configured to communicate directly not only with the first measurement device 21a but also with the second measurement device 21b and the contact information input device 22. By doing so, the control burden on the first measurement device 21a can be reduced. On the other hand, as shown in FIG. 1, by setting the communication destinations within the cubicle 1 of the monitoring and control device 23 to only the first measurement device 21a and the battery device 7, it becomes easier to install the monitoring and control device 23 independently.

[0024] The monitoring and control device CPU 43 performs control to transmit the status information and the power generation power information of the solar power generation device 8 obtained via the battery device 7 to the management server 3, and has a function as a battery control unit that controls the charge and discharge of the battery device 7 so that the power received from the grid does not exceed the set upper limit value. Further, when a power outage occurs in the grid, it performs control to use the battery 71 as the power source for the cubicle internal monitoring device 10, and has a function as a power supply control unit that performs control to supply the power generation power of the battery device 7 and the solar power generation device 8 as the power source for a specific load. It also has the function of a lower limit value setting unit, and based on the weather forecast information (sunshine information) transmitted from the management server 3, it sets the lower limit value, which is the minimum value of the remaining charge of the battery 71 of the battery device 7, and transmits it to the battery device 7.

[0025] FIG. 3 shows the power supply line within the cubicle 1 that uses the battery 71 as the power source. L1 is a DC power line, L2 is a power line to the cubicle internal monitoring device 10, L3 is a power line on the grid connection side, and the power feed circuit 25 is a circuit that supplies power to the load and the grid. As shown in FIG. 3, it is configured such that power is supplied from the battery 71 to each device that constitutes the cubicle internal monitoring device 10. Note that power is supplied to the cubicle internal monitoring device 10 automatically switched during a power outage.

[0026] In this way, when the power grid experiences a power outage, the cubicle internal monitoring device 10 is operated using the storage battery 71 as a power source. Therefore, the operation of the monitoring control device 23 is continued, and the information of the cubicle 1 can be transmitted to the management server 3 even during a power outage. Also, since the capacity of the storage battery 71 is relatively large as it is an emergency power source for the load, by implementing restrictions on the load supplied with power, etc., it becomes possible to maintain the operation of the monitoring control device 23 for a long time. Therefore, remote monitoring of the cubicle 1 can be continuously carried out, and the situation where the administrator has to rush to the site every time a power outage occurs can be reduced. Also, since the storage battery 71 is arranged inside the cubicle 1 and the PCS 72 is also installed inside the cubicle 1, the wiring work between the power distribution equipment and the storage battery equipment 7 inside the cubicle 1 can be simplified, and the installation space for the power equipment can also be minimized.

[0027] Figure 4 shows a block diagram of the management server 3. As shown in Figure 3, the management server 3 includes a storage unit 31 that stores data transmitted from a plurality of managed cubicles 1, an area information storage unit 33 that stores the area where the cubicle 1 is installed, a cubicle information storage unit 32 that stores the received power capacity of the cubicle 1, the storage capacity of the storage battery device 7, the power generation capacity of the solar power generation device 8, etc., a load power prediction unit 34 that predicts the power consumption of the load, a power generation prediction unit 35 that predicts the power generation amount of the solar power generation device 8, a management server CPU 36 that controls the management server 3, a management server communication IF 37 that communicates with the cubicle internal monitoring device 10, the electricity meter 2, etc. via the communication network N, etc.

[0028] The cubicle monitoring system configured as described above operates as follows. However, here, the control of the storage battery device 7 by the management server 3 will be mainly described. The management server 3 receives from the monitoring control device 23 of the cubicle 1 power information such as voltage information M1, M3, current information M2, M4, leakage current information M5, power consumption information of the load, etc., further oil temperature information T1, temperature information T2 of a predetermined part, and contact information such as cutoff information S1, fuse information S2, alarm information S3, S4, etc., and stores these information in the storage unit 31.

[0029] The management server 3 that has received such various types of information transmits the following information to the cubicle 1 based on the obtained information. The management server 3 notifies the monitoring and control device 23 of the received power information obtained from the watt-hour meter 2. The monitoring and control device 23 compares the transmitted received power information with the set upper limit value. If it determines that the received power is likely to exceed the upper limit value, it gives an instruction to increase the output to the battery device 7 and causes a part of the power supply of the load to be supplied from the battery 71. In this way, since the charge and discharge of the battery 71 are carried out so that the received power from the power grid does not exceed a predetermined upper limit value, it is possible to reduce the electricity bill.

[0030] In addition, the management server 3 notifies the cubicle 1 of the predicted value of the power generation amount output by the solar power generation device 8 based on the obtained weather forecast information. Specifically, it obtains weather forecast information (sunshine duration information, temperature information, wind speed information, etc.) of the area where the cubicle 1 is installed from the weather server 4, and predicts the power generation amount of the next day, for example, from the predicted sunshine duration of the next day. The management server 3 accumulates the past power generation data of the solar power generation device 8, and based on that data, the power generation prediction unit 35 predicts the power generation from the sunshine duration.

[0031] Furthermore, the management server 3 predicts the power consumption of the load and notifies the monitoring and control device 23. Specifically, the storage unit 31 of the management server 3 constitutes a load power information storage unit that accumulates the past power consumption data of the load. Based on that data, the load power prediction unit 34 predicts the power consumption amount for each day of the week and the power consumption at each predetermined time, and notifies the predicted information of the power consumption of the next day, for example.

[0032] The monitoring and control device 23 that has received the predicted power generation information and the predicted power consumption information sets the lower limit value of the storage battery 71 by the monitoring and control device CPU 43 and notifies the storage battery device 7. For example, if the power generation amount for the next day is sufficient to charge the storage battery 71 and the power consumption of the load does not change from normal, the lower limit value for the current day is set low, for example, to 10% of full charge, and the storage battery 71 is discharged to utilize the power. However, if it is determined that the predicted load power consumption for the next day is greater than that on a normal day, the lower limit value of the storage battery 71 for the current day is set higher, for example, to 20%, considering the peak shift of the power received from the grid. Conversely, if the predicted power generation value for the next day notified from the management server 3 is insufficient to charge the storage battery 71 and the power consumption of the load does not change from normal, the lower limit value for the current day is set high, for example, to 40% of full charge, to prepare for the power shortage on the next day. However, if the predicted load power consumption for the next day is greater than that on a normal day, the lower limit value for the current day is set even higher, for example, to 50%.

[0033] In this way, since the lower limit value of the remaining charge amount in the storage battery 71 is set according to the weather conditions, for example, when continuous rainy days make it impossible to expect sufficient power generation in the short term, control is implemented to set a large lower limit value to prepare for emergencies such as power outages. If sunny days continue, the lower limit value can be set small to control the utilization of the stored power, enabling the effective utilization of the storage battery 71. In addition, in addition to the weather information, the power supplied to the load is predicted to set the lower limit value of the remaining charge amount, so the storage battery 71 can be utilized more effectively.

[0034] In addition, in the above embodiment, since the storage battery device 7 and the solar power generation device 8 of the consumer can be managed on the cloud side, it is also possible to easily implement charge and discharge control in cooperation with the aggregator of the virtual power plant. Also, when a power outage (such as a typhoon or guerrilla heavy rain) is assumed based on the weather information, it is possible to automatically change the remaining battery amount of the storage battery device 7 to a larger remaining battery amount than normal to ensure the capacity. Therefore, the storage battery can be utilized with high economic efficiency at all times and can be utilized for emergencies. Thus, it is possible to achieve the same storage battery utilization as a larger storage battery capacity facility with a smaller storage battery capacity facility. In addition, when an EMS (Energy Management System) is installed in the cubicle, the monitoring and control device 23 may be incorporated into the EMS.

Explanation of Signs

[0035] 1 ··· Cubicle, 2 ··· Watt-hour meter, 3 ··· Management server, 4 ··· Weather server, 7 ··· Battery device, 8 ··· Solar power generation device, 10 ··· In-cubicle monitoring device, 21 ··· Data collection device (data collection means), 23 ··· Monitoring and control device, 31 ··· Storage unit (load power information storage unit), 34 ··· Load power prediction unit, 35 ··· Power generation prediction unit, 36 ··· Management server CPU, 37 ··· Management server communication IF (received power information acquisition unit, weather information acquisition unit), 43 ··· Monitoring and control device CPU (battery control unit, power supply control unit).

Claims

1. A cubicle monitoring system comprising: a cubicle that houses high-voltage power receiving equipment for receiving high-voltage power of a system and supplies power converted to low voltage to a load; and a management server disposed on the cloud that accumulates and manages the status information of the cubicle, wherein the cubicle includes a storage battery for supplying power to at least a part of the load when the system experiences a power outage, a monitoring device inside the cubicle that transmits the status information to the management server, a power conditioner that converts the DC power generated by the solar power generation device and the DC power stored in the storage battery into AC power and supplies it to the load, and converts the AC power from the system into DC power and supplies it to the storage battery, the monitoring device inside the cubicle includes data collection means for measuring and collecting physical data including voltage values and current values at a predetermined part of the cubicle, which is part of the status information, and includes a monitoring control device for controlling the charge and discharge of the storage battery and communicating with the management server, the management server includes a received power information obtaining unit that obtains received power information from a watt-hour meter that measures the received power supplied from the system to the cubicle, a weather information obtaining unit that obtains weather forecast information for the area where the cubicle is installed, and a power generation prediction unit that predicts the power generation of the solar power generation device supplied to the cubicle from the obtained weather forecast information. On the other hand, the monitoring control device obtains the received power information from the management server and includes a storage battery control unit that controls the charge and discharge of the storage battery so that the received power does not exceed a predetermined upper limit value, when the system experiences a power outage, it includes a power supply control unit that supplies power to the monitoring device inside the cubicle from the storage battery to maintain the function of the monitoring device inside the cubicle, the monitoring control device is characterized in that it obtains prediction information on the power generation of the solar power generation device from the management server and sets a lower limit value of the remaining charge of the storage battery based on the prediction information. A cubicle monitoring system.

2. A cubicle monitoring system comprising: a cubicle that houses high-voltage power receiving equipment for receiving high-voltage power of a system and supplies power converted to low voltage to a load; and a management server disposed on the cloud that accumulates and manages the status information of the cubicle, wherein the cubicle includes a storage battery for supplying power to at least a part of the load when the system experiences a power outage, It has a cubicle monitoring device that transmits the state information to the management server, The cubicle monitoring device includes data collection means for measuring and collecting physical data including voltage values and current values of a predetermined part of the cubicle, which is part of the state information, It is provided with a monitoring control device that controls the charging and discharging of the storage battery and communicates with the management server, The management server has a received power information obtaining unit that obtains received power information from a watt-hour meter that measures the received power supplied from the system to the cubicle. On the other hand, The monitoring control device obtains the received power information from the management server and has a storage battery control unit that controls the charging and discharging of the storage battery so that the received power does not exceed a predetermined upper limit value, When a power outage occurs in the system, it has a power supply control unit that supplies power to the cubicle monitoring device from the storage battery to maintain the functions of the cubicle monitoring device, Furthermore, the state information transmitted by the monitoring control device to the management server includes usage power information supplied to the load, The management server has a load power information storage unit that stores the received usage power information, Based on the past usage power information, it has a load power prediction unit that predicts the usage power of the load from the present to a predetermined time in the future, and transmits prediction information of the usage power to the monitoring control device, The monitoring control device is characterized in that it sets a lower limit value of the remaining charge of the storage battery based on the prediction information. A cubicle monitoring system.

3. The state information transmitted by the monitoring control device to the management server includes usage power information supplied to the load, The management server has a load power information storage unit that stores the received usage power information, Based on the past usage power information, it has a load power prediction unit that predicts the usage power of the load from the present to a predetermined time in the future, and transmits prediction information of the usage power to the monitoring control device, The monitoring control device is characterized in that it sets a lower limit value of the remaining charge of the storage battery based on the prediction information. The cubicle monitoring system according to claim 1.

Images