Airport lighting system, power switching method and program

Abstract

To provide an airport lighting system with a reduced operating cost related to lighting of lights.SOLUTION: An airport lighting system 1 according to one embodiment includes: a storage battery 29; a switching device 30 that switches output power between the discharge power of the storage battery 29 and power supplied from a commercial power source 31; a controller 35 that uses the output power of the switching device 30 when a light 18 starts lighting as the discharge power of the storage battery 29 and switches the switching device 30 according to the remaining capacity of the storage battery 29; and a plurality of transformers 16 with primary sides connected to a power line 15 that is supplied with the power output from the switching device 30, for supplying the power taken out from the secondary side to the light 18.SELECTED DRAWING: Figure 10

Description

Technical Field

[0001] Embodiments of the present invention relate to an airport lighting system, a power supply switching method, and a program.

Background Art

[0002] In order for aircraft to take off and land safely, lights are installed on the runway of the airport. The airport lighting system operates by changing the brightness according to the visibility. So far, the power supply for the lights mainly uses commercial power supplied from a general power transmission company. For example, in case of a power outage or other abnormal situations where the power supply from the transmission line stops, the operation is switched to a battery, which is an auxiliary power supply.

[0003] Since many lights are installed at the airport, the operating cost of the airport lighting system can be reduced by lowering the power supplied from the commercial power supply to the airport lighting system.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] Airports are often built in places far from populated areas, such as off the coast of the ocean or in the mountains, from the perspective of environmental assessment such as the noise problem of aircraft takeoff and landing. Therefore, since there are no buildings blocking sunlight around, it is possible to prepare places for installing solar panels nearby, such as mountain slopes and sea shore protection walls. In addition, it is possible to install wind turbines on mountain ridges and ridgelines, and wind turbines on the coast.

[0006] If lighting systems can be operated using energy stored in batteries, the consumption of electricity supplied from commercial power sources can be reduced, and the operating costs of lighting systems can be kept low.

[0007] Embodiments of the present invention have been made in view of the above circumstances, and aim to provide an airport lighting system, a power switching method, and a program that reduce the operational costs related to lighting. [Means for solving the problem]

[0008] An airport lighting system according to one embodiment includes a battery, a switching device that switches the output power between the discharge power of the battery and power supplied from a commercial power source, a controller that sets the output power of the switching device at the start of lighting the lights to the discharge power of the battery and switches the switching device according to the remaining capacity of the battery, and a plurality of transformers whose primary side is connected to a power line powered by the power output from the switching device and which supply power taken from the secondary side to the lights. The switching device comprises a plurality of power lines, and includes an operation switching unit having a first input terminal to which power is supplied from the commercial power supply, a second input terminal to which power is supplied from the storage battery, and a first output terminal, and a plurality of individual operation switching units having a third input terminal to which the output power of the first output terminal is supplied, a fourth input terminal to which power is supplied from the storage battery, and a second output terminal to which power is supplied to a portion of the power lines connected to the primary side of the plurality of transformers. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is a schematic diagram showing one example of the configuration of an airport lighting system according to one embodiment. [Figure 2] Figure 2 shows an example of the configuration of a lighting monitoring device for an airport lighting system according to one embodiment. [Figure 3] Figure 3 is a block diagram showing an example of the configuration of a master station in an airport lighting system according to one embodiment. [Figure 4] Figure 4 is a block diagram showing an example of the configuration of a slave station in an airport lighting system according to one embodiment. [Figure 5] Figure 5 is a diagram illustrating an example of the injection pattern of the noise cancellation signal from the master station shown in Figure 3. [Figure 6] Figure 6 is a block diagram showing an example of the configuration of a weather monitoring system for an airport lighting system according to one embodiment. [Figure 7] Figure 7 is a flowchart showing an example of weather monitoring processing in an airport lighting system according to one embodiment. [Figure 8] Figure 8 is a flowchart showing an example of weather anomaly registration processing in an airport lighting system according to one embodiment. [Figure 9] Figure 9 is a flowchart showing an example of alarm advice processing in an airport lighting system according to one embodiment. [Figure 10] Figure 10 is a block diagram showing an example of the configuration of a lighting power supply system for an airport lighting system according to one embodiment. [Figure 11] Figure 11 shows an example of the switching process for the switching device of the lighting power supply system shown in Figure 10. [Figure 12] Figure 12 is a time chart illustrating an example of the operation of the switching device shown in Figure 10. [Modes for carrying out the invention]

[0010] The airport lighting system, power switching method, and program according to the embodiments will be described in detail below with reference to the drawings. Note that the scale of each part in the drawings used in the description of the embodiments below has been changed as appropriate. Also, in the drawings used in the description of the embodiments below, some components may be omitted for illustrative purposes.

[0011] Figure 1 is a schematic diagram showing one example of the configuration of an airport lighting system according to one embodiment. The airport lighting system 1 shown in Figure 1 is a system for managing lights installed at an airport, and includes a lighting monitoring device 2, a flight planning device 3, an image analysis device 4, a weather monitoring system 5, a lighting power supply system 6, a LAN (Local Area Network) 7, and a monitoring monitor 8.

[0012] The lighting monitoring device 2, the operation planning device 3, the image analysis device 4, the weather monitoring system 5, the lighting power supply system 6, and the monitoring monitor 8 are connected via the LAN 7, enabling data transmission and reception between these components. Note that the lighting monitoring device 2, the operation planning device 3, the image analysis device 4, the weather monitoring system 5, the lighting power supply system 6, and the monitoring monitor 8 may be connected via a wireless network or the like to perform data transmission and reception.

[0013] The operation planning device 3 conducts traffic surveys and simulations of aircraft, creates flight operation plan information and aircraft information, and outputs this information.

[0014] The image analysis device 4 identifies the flight number and the current position of an aircraft from the approximate position of the image data captured by the airport surface radar that captures reflected waves from aircraft and other objects installed at the airport, in conjunction with the flight operation plan information and the output of the aircraft sensor, and acquires and outputs the flight number aircraft information.

[0015] FIG. 2 is a diagram showing an example of the configuration of the lighting monitoring device of an airport lighting system according to an embodiment. The lighting monitoring device 2 is a device for monitoring the state of the lighting installed within the airport, and includes the LAN 9, the master unit 10, the constant current power supply device (CCR) 11, the stabilizer device (OP / C) 12, the master station 13, the bypass filter device 14, the power line 15, the transformer 16, the slave unit 17, and the lighting 18. The master unit 10 and the master station 13 perform data transmission and reception through the LAN 9.

[0016] When the lighting monitoring device 2 detects an abnormality in at least one of a plurality of lights, it outputs information about the abnormal light. Also, the lighting monitoring device 2 adjusts the brightness of the lights in conjunction with the visibility. The index of visibility may be determined by the lighting monitoring device 2 based on information from the weather monitoring system 5, or may be based on the visual judgment of an airport controller or the like.

[0017] The constant current power supply unit 11 is installed in the airport's power station building. The constant current power supply unit 11 is connected to the power line (lighting circuit cable) 15 via a bypass filter device 14.

[0018] The power line 15 connects the primary sides of multiple transformers 16 in series. Each of the secondary sides of the multiple transformers 16 is connected to a substation 17. Furthermore, a light fixture 18 is connected to each substation 17.

[0019] The power line 15 and the substation 17 are electrically isolated by the transformer 16. The power supplied from the power line 15 to the transformer 16 generates currents with different reference potentials on the secondary side of the transformer 16, which are supplied to the substation 17 and the lamps 18, so that a constant current flows through each lamp.

[0020] The bypass filter device (BPF device) 14 is installed, for example, near the constant current power supply device 11, and separates noise in the communication route of the power line 15 from power supply noise. The bypass filter device 14 obtains the commercial power supply waveform by, for example, acquiring the current flowing through an LRC resonant circuit and purifying it with a filter. By intervening the bypass filter device 14 between the constant current power supply device 11 and the power line 15 to the light fixture 18, the signal frequency bands used by the constant current power supply device 11 and the light fixture 18 are separated. That is, an LRC resonant circuit is constructed using L (coil), R (resistor), and C (capacitor), so that the signals used on the light fixture circuit side circulate on the light fixture circuit side, and the CCR noise circulates on the power supply side.

[0021] The master station 13 is connected to the bypass filter device 14. The master station 13 operates by receiving power from the constant current power supply device 11 and communicates with its subordinate slave stations 17 via power lines 15 using power line carriers. The constant current power supply device 11 may be multiplexed into a primary power supply and a backup power supply. A stabilizer (OP / C) 12 may also be provided between the constant current power supply device 11 and the bypass filter device 14.

[0022] The master station 13 is connected to the master unit 10 via LAN 9. The master unit 10 is a robust computer, such as a PLC (Programmable Logic Controller). The master unit 10 is further connected to the monitoring monitor 8 via LAN 7. The monitoring monitor 8 is, for example, a general-purpose server computer equipped with a monitor that displays the runway status in real time.

[0023] The master station 13 sends, for example, periodic question commands to its subordinate slave stations 17, which are connected to a common power line 15.

[0024] The slave station 17 transmits a response signal to the master station 13 at a timing corresponding to the address assigned to it. The slave station 17 monitors the status of the light 18 and notifies the master station 13 if a malfunction such as a burnt-out bulb occurs. This immediately detects the location of the broken wire and displays it on the monitoring monitor 8. The operator can refer to this display and take appropriate action.

[0025] Similarly, in a stop line light system or RWSL system (neither shown) that controls the lights 18, control of the lights 18 is performed by power line carrier communication using power lines 15. Based on information acquired by an aircraft detection sensor or airport surface radar, a control command is given from the master station 13 to the slave station 17, and the slave station 17 controls the lights under its control by turning them ON / OFF. This makes it possible to guide aircraft to the ground using light control.

[0026] Figure 3 is a block diagram showing an example of the configuration of a master station in an airport lighting system according to one embodiment. In Figure 3, the power line on the IN side in relation to the constant current power supply 11 is referred to as the F side, and the power line on the OUT side is referred to as the R side. Signals from the slave station 17 are received at two locations: the F side and the R side. In other words, a diversity configuration is adopted that allows the other side to compensate even if the reception level of one signal is low. In this embodiment, signal injection into the power line 15 is performed on the F side.

[0027] The master station 13 includes a signal processing unit 50, a processor 53, interface units 54 and 59, a waveform shaping unit 55, an amplification unit 56, a signal injection unit 57, and a power supply waveform acquisition unit 58. Of these, the power supply waveform acquisition unit 58 digitally converts the power supply waveform acquired from the bypass filter device 14 and passes it to the processor 53.

[0028] The signal processing unit 50 includes a modem unit (F side) 51 and a modem unit (R side) 52. The modem unit 51 generates a modulated signal by modulating the carrier signal on the F side with a multi-bit code using a modulation scheme that represents symbols using a combination of frequency shift and phase shift. The generated modulated signal is input to the signal injection unit 57 via the waveform shaping unit 55 and the amplification unit 56. The signal injection unit 57 injects the modulated signal into the power line 15 in synchronization with the power supply cycle of the constant current power supply unit 11. In this embodiment, the signal injection unit 57 may be divided into a modulation unit that generates a modulated signal by modulating the carrier signal on the F side with a multi-bit code using a modulation scheme that represents symbols using a combination of frequency shift and phase shift, and an injection unit that injects the modulated signal into the power line 15 in synchronization with the power supply cycle of the constant current power supply unit 11.

[0029] The modem unit 52 generates a modulated signal by modulating the R-side carrier signal with a multi-bit code using a modulation scheme that represents symbols using a combination of frequency shift and phase shift. In this embodiment, a modulation scheme is employed that associates a 2-bit code with four symbols represented by two different frequencies and phases. This scheme may also be called a dual modulation scheme.

[0030] The processor 53 provides the signal processing unit 50 with a multi-bit code, including the command to be sent to the slave station 17 and the address of the master station 13, causing it to generate a modulated signal. The processor 53 repeatedly executes a transmit / receive sequence, which includes sending a code from the master station 13 to the slave station 17 and sending a response code from the slave station 17 to the master station 13.

[0031] The processor 53 may also acquire weather information from the weather monitoring system 5, which will be described later. The processor 53 can control the signal processing unit 50 to correct the modulated signal when the acquired weather information satisfies pre-set conditions. For example, depending on weather conditions such as temperature and humidity in the area including the airport, the influence on the signal waveform transmitted by the power line 15 may be measured in advance, and a table or formula for obtaining a correction value for the acquired weather information may be stored in memory (not shown).

[0032] Furthermore, the modem unit 51 demodulates the signal waveform extracted on the F side and reproduces the response code from the slave station 17. The modem unit 52 demodulates the signal waveform extracted on the R side and reproduces the response code from the slave station 17. The reproduced code is passed to the processor 53 for processing. Then, various data contained in the response code are transmitted from the interface unit 59 to the master unit 10 via the LAN 9.

[0033] Figure 4 is a block diagram showing an example of the configuration of a slave station in an airport lighting system according to one embodiment. The slave station 17 comprises a processing unit 60 and a power line unit 61. As shown in Figure 4, the slave station 17 is laid between the transformer 16 and the lamp 18. The power line unit 61 is connected to the secondary side of the transformer 16 and supplies power to the lamp 18, and inputs the power waveform to the receiving unit 62 of the processing unit 60. The status of the lamp 18 is acquired by the signal acquisition unit 69 and passed to the filament break control unit 66 of the processing unit 60. The driving power for the slave station 17 is acquired from the power line 15 by the power acquisition unit 70. An aircraft detection sensor 71 for detecting aircraft is connected to the secondary side of the transformer 16. The lamp side is short-circuited.

[0034] The receiving unit 62 of the processing unit 60 receives the modulated signal transmitted from the master station 13 from the power waveform on the secondary side of the transformer 16. The received modulated signal is input to the PLD (Programmable Logic Device) 63. The PLD 63 demodulates the modulated signal and reconstructs the code transmitted from the master station 13. The reconstructed code is passed to the processor 64. In this embodiment, the PLD 63 is the demodulation unit.

[0035] The processor 64 processes the code from the PLD 63, the data from the core breakage control unit 66, and the data from the aircraft detection sensor 71 via the sensor interface 65, etc., to generate a response code for the master station 13. The response code is input to the PLD 63. The PLD 63 modulates the carrier signal with the response code using the modulation scheme of the embodiment (dual modulation scheme) to generate a response signal. The response signal is passed to the transmission control unit 67.

[0036] The transmission control unit 67 controls the transmission circuit 68 of the power line unit 61 to inject a response signal into the power line 15. This transmits the response signal to the master station 13 via the power line 15. In particular, in this embodiment, the transmission circuit 68 short-circuits / opens the secondary side of the transformer in synchronization with the power cycle to generate an overvoltage, and transmits the response signal using this overvoltage.

[0037] The transmitting circuit 68 generates an overvoltage on the secondary side of the transformer 16 by opening and closing the power supply circuit like a switch. By using this overvoltage as a signal, it becomes possible to generate a signal with low power consumption of 10W or less.

[0038] Figure 5 is a diagram illustrating an example of the injection pattern of the noise cancellation signal from the master station shown in Figure 3. The injection period of the modulated signal generated by the processor 53 in the master station 13 to the slave station 17 is fixed. Therefore, there are sections with and without modulated signals.

[0039] The master station 13 acquires the frequency of the section without a modulated signal (uninjected modulated signal section) and generates the inverse phase of that frequency. Next, the master station 13 identifies the frequency of the section with a modulated signal that has the same period as the uninjected modulated signal section (injected modulated signal section). The master station 13 compares the uninjected modulated signal section and the injected modulated signal section that have the same period and acquires a noise signal from the comparison result.

[0040] The master station 13 generates the inverse phase of the acquired noise signal and superimposes it onto the above-mentioned modulation signal injection section. This inverse phase signal of the noise signal is used as the noise canceling signal. The timing at which the master station 13 acquires the noise signal may be, for example, the timing at which the weather monitoring system 5 detects abnormal weather conditions.

[0041] Accordingly, the airport lighting system 1 according to this embodiment comprises a slave station 17 provided between the secondary side of the transformer 16 and the lights 18, and a master station 13 that communicates with the slave station 17 via a power line 15. The master station 13 comprises a modulation unit that generates a modulated signal by modulating the carrier signal with a multi-bit code using a modulation scheme that represents symbols using a combination of frequency shift and phase shift, and an injection unit that injects the modulated signal into the power line 15 in synchronization with the power supply cycle. The slave station 17 comprises a receiving unit that receives the modulated signal from the power waveform on the secondary side of the transformer 16, and a demodulation unit that demodulates the received modulated signal to regenerate the code. The master station 13 compares the frequency in the uninjected section with the frequency in the injected section of the modulated signal which has the same period as the uninjected section, and superimposes the inverse phase of the noise signal onto the injected section of the modulated signal.

[0042] Figure 6 is a block diagram showing an example configuration of a weather monitoring system for an airport lighting system according to one embodiment. The weather monitoring system 5 comprises a weather monitoring device 72 and a weather monitoring server 19, and transmits and receives data via a wireless communication network or the like.

[0043] The weather monitoring device 72 is equipped with various sensors for observing weather information such as wind direction, wind speed, probability of precipitation, temperature, humidity, and visibility, and stores the weather information in a memory device or the like, linking it with time and location. The weather monitoring device 72 observes and stores weather information in real time and transmits the weather information to the weather monitoring server 19 via the network at predetermined intervals.

[0044] The weather monitoring server 19 comprises weather data management means 20, engineering means 21, communication means 23, equipment monitoring means 24, and bus communication lines 25. The engineering means includes weather monitoring means 22. The weather data management means 20, the engineering means 21, the communication means 23, and the equipment monitoring means 24 transmit and receive data via the bus communication line 25.

[0045] Communication means 23 receives weather information data transmitted from weather monitoring equipment via a dedicated network. The weather information data received by communication means 23 is stored in weather data management means 20.

[0046] The weather data management means 20 is a non-temporary computer-readable storage medium. The weather data management means 20 is, for example, an EEPROM (electric erasable programmable read-only memory), an HDD (hard disk drive), or an SSD (solid state drive). The weather data management means 20 pre-stores plant information, general information (name, address), component equipment information, equipment layout information, and control and monitoring information. This information is an example, and the information pre-stored in the weather data management means 20 is configured to be configurable by designers, users, etc.

[0047] The engineering means 21 includes at least one processor such as a CPU (Central Process Unit), MPU (microprocessing unit), GPU (Graphics Processing Unit), or FPGA (field-programmable gate array). The engineering means 21 can implement various functions of the weather monitoring server 19 based on programs such as system software, application software, or firmware stored in the weather data management means 20.

[0048] The engineering means 21 edits and aggregates weather information and manages weather trends based on the weather information. The weather monitoring means 22 included in the engineering means 21 acquires weather information from the weather data management means 20, notifies the lighting power supply system 6 of the detection of weather anomalies, and the lighting power supply system corrects the modulation signal. Details of the above process will be described later.

[0049] Figure 7 is a flowchart showing an example of weather monitoring processing in an airport lighting system according to one embodiment. Figure 8 is a flowchart showing an example of weather anomaly registration processing in an airport lighting system according to one embodiment. Figure 9 is a flowchart showing an example of alarm advice processing in an airport lighting system according to one embodiment.

[0050] The following describes an example of a procedure for detecting weather anomalies using the weather monitoring system 5 and shutting down renewable energy power generation equipment based on the trend of the anomalies. Note that the processing content in the following description of the operation is just an example, and various processes that can achieve similar effects can be used as appropriate.

[0051] The weather monitoring system 5 acquires weather information, for example, using sensors provided by the weather monitoring device 72. The weather monitoring device 72 transmits the acquired weather information to the weather monitoring server 19 via the network, and the communication means 23 receives the weather information.

[0052] The weather monitoring server 19 stores the received weather information in the weather data management means 20. From here, the weather monitoring means starts the anomaly monitoring process shown in Figure 7. The weather monitoring means 22 acquires the weather information and weather observation site information, and compares the parameter data of the acquired weather information with the parameter data of normal weather information that is stored in advance in the weather data management means 20 (step S1). If the weather monitoring means 22 detects a weather anomaly from the comparison result of step S1 (step S1, YES), it transitions to the weather anomaly registration process shown in Figure 8. Note that the weather data management means 20 may also have parameter data of anomaly weather information stored in advance, and the weather monitoring means 22 may be configured to compare the parameters of the anomaly weather information.

[0053] The weather monitoring means 22 starts the weather anomaly registration process. The weather monitoring means 22 determines whether the weather anomaly is a new warning (step S12). Here, a warning is an indicator that represents a weather anomaly, such as when the amount of rainfall is greater than a predetermined threshold, when the wind speed is faster than a predetermined threshold, or when the temperature is higher than a predetermined threshold.

[0054] When the weather monitoring means 22 detects that a new warning has been issued (step S12, YES), it obtains the date and time the warning was issued (step S13). Next, the weather monitoring means 22 displays detailed information about the warning using a display means such as a monitor (step S14).

[0055] The weather monitoring means 22 counts the number of times the above warning has occurred (step S15) and transitions to the warning advice processing shown in Figure 9. The weather monitoring means 22 starts the warning advice processing. The weather monitoring means 22 determines whether the warning data collection time up to the previous day has passed (step S19). The collection time may be set, for example, immediately after the date changes, or at any time in the morning or evening of that day.

[0056] If the weather monitoring means 22 determines that the time for collecting warning data up to the previous day has passed (step S19, YES), it collects abnormal weather information up to the previous day for each warning (step S20). Next, the weather monitoring means 22 creates a database of warning occurrences within the analysis scope (step S21). In this embodiment, the analysis scope is, for example, the range from one week ago to the previous day. The analysis scope can be set in advance, for example, from one month ago or one year ago.

[0057] The database created in step S21 contains, for example, a record of how many times an alarm defined as an abnormal weather event occurred during a week. The weather monitoring means 22 compares the alarm occurrence count calculated based on the database with a predetermined judgment criterion (step S22).

[0058] The weather monitoring device 22 determines whether the trend conditions are met based on the comparison results in step S22 (step S23). The trend conditions are set as conditions such as the occurrence of a certain number of abnormal wind speed warnings from one week ago to the day before, and serve as an indicator that there is a tendency for wind speed warnings to be issued.

[0059] If the weather monitoring means 22 determines that the trend conditions are met based on the comparison results (step S23, YES), it registers the trend (step S24) and terminates the warning advice processing.

[0060] The process returns to registering weather anomalies. The weather monitoring means 22 notifies the master station 13 to change the noise signal acquisition period (step S16). Since the noise signal changes moment by moment and is never constant, it is possible to implement a noise cancellation function by changing the noise signal acquisition period at the timing when an alarm is issued, etc.

[0061] Next, the weather monitoring means 22 notifies the master station 13 to correct the transmission timing (step S17). The weather monitoring means 22 refers to the weather information at the time the alarm was issued and notifies the master station 13 that there is a possibility of a discrepancy in the transmission timing. This allows the master station 13 to correct the transmission timing if a phase discrepancy occurs. The processes in steps S16 and S17 described above may be configured to be performed by the equipment monitoring means 24 instead of the weather monitoring means 22.

[0062] If the weather monitoring means 22 detects that it is not a new warning (step S12, NO), it skips steps S13 to S17 and continues the weather monitoring process (step S18).

[0063] Returning to the weather monitoring process, the weather monitoring means 22 detects a weather anomaly (step S1, YES) and terminates the weather anomaly registration process, or if the weather monitoring means 22 does not detect a weather anomaly (step S1, NO), it proceeds to process S2.

[0064] The weather monitoring means 22 starts the abnormality detection process using each sensor of the weather monitoring device 72 (step S2). Abnormality detection by a sensor refers to a case where there is no weather abnormality, but one of the weather information parameters detected by the sensor is abnormal, such as a rise in temperature or a rise in humidity.

[0065] If the weather monitoring means 22 detects an anomaly in any of the sensors of the weather monitoring device 72 (step S3, YES), it displays the status of the weather information parameter in which the anomaly was detected on a monitor or the like (step S8). The weather monitoring means 22 counts the occurrence of warnings based on the weather information parameter (step S9).

[0066] After processing in step S9, the alarm advice process is executed again. After the alarm advice process is executed, the weather monitoring process returns. The weather monitoring means 22 notifies the master station 13 to change the noise signal acquisition period (step S10). Subsequently, the weather monitoring means 22 notifies the master station 13 to correct the transmission timing (step S11).

[0067] If the weather monitoring means 22 does not detect any abnormalities from the sensors of the weather monitoring device 72 (step S3, NO) or if it transitions from the processing in step S11, it displays an abnormality on a monitor or the like (step S4). Next, the weather monitoring means 22 outputs detailed information of the warning to the database created in the warning advice processing (step S5).

[0068] The weather monitoring means 22 investigates the occurrence of abnormal weather and warnings for the day and the week (step S6). Based on the investigation results, the weather monitoring means 22 outputs the calculated weather trends to the lighting monitoring device 2, the monitoring monitor 8, the lighting power supply system 6, and the equipment monitoring means 24 (step S7).

[0069] For example, if the weather monitoring means 22 outputs that there is a tendency for strong winds, and a wind power generation device 26 is installed near a weather observation site associated with that weather trend, the equipment monitoring means 24 generates a stop signal and outputs it to the wind power generation device 26.

[0070] Accordingly, the airport lighting system 1 according to this embodiment includes a charge / discharge device 28 that charges a battery 29 using renewable energy, a weather monitoring device 72 that acquires weather information using sensors, a weather data management means 20 that stores weather observation site information and the weather information linked together, a weather monitoring means 22 that detects weather anomalies from the weather information, and an equipment monitoring means 24 that generates a stop signal for a renewable energy power generation device based on weather observation site information corresponding to the weather information in which an anomaly was detected when the weather anomaly satisfies predetermined conditions.

[0071] Furthermore, the airport lighting system 1 according to this embodiment includes a slave station 17 provided between the secondary side of the transformer 16 and the lights 18, and a master station 13 that communicates with the slave station 17 via a power line 15. The master station 13 includes a modulation unit that modulates the carrier signal with a multi-bit code using a modulation scheme that represents symbols using a combination of frequency shift and phase shift to generate a modulated signal, and an injection unit that injects the modulated signal into the power line 15 in synchronization with the power supply cycle. The slave station 17 includes a receiving unit that receives the modulated signal from the power waveform on the secondary side of the transformer 16, and a demodulation unit that demodulates the received modulated signal to regenerate the code. The master station 13 corrects the modulated signal according to the weather information acquired from the weather monitoring system 5.

[0072] Figure 10 is a block diagram showing an example of the configuration of a lighting power supply system for an airport lighting system according to one embodiment. The lighting power system 6 includes a UPS power supply 41, a switching device 30, a commercial power supply 31, a smart meter 32, high-voltage receiving equipment 33, a distribution board 34, a controller 35, a generator 38, a constant voltage constant frequency device (CVCF) 39, and power lines 40.

[0073] Note that the lighting monitoring device 2 shown in Figure 2 may be included in the lighting power supply system 6. The wind power generation device 26, the solar power generation device 27, the charge / discharge device 28, the storage battery 29, the switching device 30, the commercial power supply 31, the smart meter 32, the high-voltage receiving equipment 33, the distribution board 34, the controller 35, the generator 38, and the constant voltage constant frequency device 39 transmit and receive data via the power line 40.

[0074] The lighting power system 6 is connected, for example, to a wind power generator 26 and a solar power generator 27.

[0075] For example, if the airport is located at the foot of a mountain, the wind turbine 26 will be installed along the ridge of the mountain, and if the airport is located on reclaimed land, it will be installed offshore. The solar power generation equipment 27 can be installed regardless of its location within the airport, for example, on a south-facing slope or in unused space.

[0076] Furthermore, the lighting power system 6 only needs to be connected to a renewable energy power generation device. It may also be connected to power generation devices that utilize energy other than wind power generation devices 26 and solar power generation devices 27, such as wave power, tidal power, tides, and geothermal energy.

[0077] The electricity generated by the wind turbine 26 and the solar power generator 27 is used to charge the battery 29 via the charge / discharge device 28. The UPS power supply 41 includes the charge / discharge device 28 and at least one battery 29. In Figure 10, there is one wind turbine 26, one solar power generator 27, one charge / discharge device 28, and one battery 29, but there may be multiple wind turbines 26, solar power generators 27, charge / discharge devices 28, and batteries 29.

[0078] Any surplus electricity generated by the wind power generator 26 and the solar power generator 27 will be sold to the general power transmission company. When selling electricity, negotiations will be conducted with the general power transmission company, and the power will be supplied through a switch only when the power dispatch center has given permission to sell electricity to the output control information transmission device.

[0079] Furthermore, the electricity generated by the wind power generator 26 and the solar power generator 27 can also be supplied directly to the constant current power supply unit 11 under the control of the controller 35.

[0080] The storage battery 29 is charged via the charge / discharge device 28. The remaining capacity of the storage battery 29 is measured by an ammeter or the like and managed by the capacity monitoring unit 36.

[0081] Furthermore, since the power supplied to the lights 18 is calculated in advance based on information output by the operation planning device 3, the image analysis device 4, and the weather monitoring system, the storage battery 29 determines the power supply time according to the plan from the power supply planning unit 37 between the end of charging and the start of power supply.

[0082] The switching device 30 switches the power source supplied to the lights 18 from the battery 29 to the commercial power supply 31, depending on the remaining capacity of the battery. The trigger for the switching device 30 to switch from power supplied by the battery 29 to power supplied by the commercial power supply 31 is, for example, when the remaining capacity of the battery 29 falls below a predetermined threshold. A detailed explanation of this process will be given later.

[0083] The switching device 30 can also be switched to supply power to the lights directly from, for example, the wind power generator 26 and the solar power generator 27.

[0084] The commercial power supply 31 transmits electricity from a general power transmission company to the switching device 30 via a smart meter 32, high-voltage receiving equipment 33, and a distribution board 34. The commercial power supply 31 can also supply power directly to the lights 18 without going through the switching device 30.

[0085] The controller 35 includes at least one processor, such as a CPU (Central Process Unit), MPU (microprocessing unit), GPU (Graphics Processing Unit), or FPGA (field-programmable gate array). The controller 35 monitors the status of the battery 29 and controls the switching device 30 according to the status of the battery 29. The controller 35 includes a capacity monitoring unit 36 ​​and a power supply planning unit 37.

[0086] The capacity monitoring unit 36 ​​monitors the remaining capacity of the battery 29. When the remaining capacity of the battery 29 falls below a predetermined threshold, the capacity monitoring unit 36 ​​switches the output power of the switching device 30 from the discharge power of the battery 29 to power supplied from the commercial power supply. The predetermined threshold is set in advance by the designer or user of the lighting power supply system 6.

[0087] The power planning unit 37 obtains the remaining capacity of the battery 29 after it has finished charging. Based on the remaining capacity of the battery 29, the information output by the operation planning device 3 and the image analysis device 4, and the information output by the weather monitoring system 5, the power planning unit 37 calculates the time during which power can be supplied to the lights 18. After the calculated power supply time has elapsed since the start of power supply to the lights 18, the power planning unit 37 switches the output of the switching device 30 to power supplied from the commercial power source.

[0088] The constant voltage and constant frequency device 39 supplies a constant voltage and constant frequency power supply to the constant current power supply device 11 in response to instantaneous voltage and frequency fluctuations caused by load fluctuations or power supply quality fluctuations. The constant voltage and constant frequency device 39 does not synchronize with the voltage and frequency of the wind power generation device 26, solar power generation device 27, storage battery 29, commercial power supply 31, or generator 38, and always supplies a constant voltage and constant frequency power supply.

[0089] Accordingly, the airport lighting system 1 according to this embodiment includes a storage battery 29, a switching device 30 that switches the output power between the discharge power of the storage battery 29 and power supplied from a commercial power source 31 according to the remaining capacity of the storage battery 29, a controller 35 that sets the output power of the switching device 30 at the start of lighting the lights 18 to the discharge power of the storage battery 29 and switches the switching device 30 according to the remaining capacity of the storage battery 29, and a plurality of transformers 16 whose primary side is connected to a power line 15 powered by the power output from the switching device 30 and which supply power taken out from the secondary side to the lights 18.

[0090] Next, we will explain the process by which the switching device 30 of the lighting power supply system 6 switches the power supply source from the storage battery 29 to the commercial power supply 31.

[0091] Figure 11 shows an example of the switching process of a switching device 30 according to one embodiment. The switching device 30 includes an operation switching unit 42 and an individual operation switching unit 46. The operation switching unit 42 includes a first input terminal 43, a second input terminal 44, and a first output terminal 45. The individual operation switching unit 46 includes a third input terminal 47, a fourth input terminal 48, and a second output terminal 49.

[0092] The operation switching unit 42 of the switching device 30 is connected (via a distribution board) to the commercial power supply 31 and a first input terminal 43, and power is supplied from the commercial power supply 31 through the power lines. The operation switching unit 42 of the switching device 30 is also connected to the UPS power supply 41 and a second input terminal 44, and power is supplied from the UPS power supply 41 through the power lines. The UPS power supply 41 includes, for example, one or more storage batteries 29 and a charge / discharge device 28.

[0093] In each of the multiple individual operation switching units 46, the output power of the first output terminal 45 is supplied to the third input terminal 47, and the output power of the UPS power supply 41 is supplied to the fourth input terminal 48. The second output terminal 49 supplies power to each of the power lines 15 connected to the primary side of the multiple transformers 16 (via a constant voltage constant frequency device (CVCF) 39). The second output terminal 49 may be configured to supply power to multiple power lines 15.

[0094] Before power supply to the lights 18 begins, the operation switching unit 42 connects the second input terminal 44 and the first output terminal 45. The individual operation switching unit 46 also connects the third input terminal 47 and the second output terminal 49. In this state, the discharge power from the UPS power supply 41 is supplied to the multiple lights 18.

[0095] The capacity monitoring unit 36 ​​monitors the remaining capacity of the battery 29 included in the UPS power supply 41. When it detects that the remaining capacity has fallen below a predetermined threshold (hereinafter referred to as the first threshold), it controls the operation switching unit 42 to disconnect the second input terminal 44 and connect the first input terminal 43 and the first output terminal 45. As a result, the operation switching unit 42 enters a state where power is supplied from the commercial power supply 31.

[0096] When the capacity monitoring unit 36 ​​detects that the remaining capacity of the battery 29 has fallen below the first threshold, it controls the multiple individual operation switching units to disconnect the third input terminal 47 and connect the fourth input terminal 48 and the second output terminal 49, except for at least one individual operation switching unit 46. As a result, at least one individual operation switching unit 46 is powered by the commercial power supply 31, while the remaining individual operation switching units 46 continue to be powered by the UPS power supply 41.

[0097] Next, when the capacity monitoring unit 36 ​​detects that the remaining capacity of the storage battery 29 has fallen to a second threshold, which is smaller than the first threshold, it controls at least one of the individual operation switching units 46 that is receiving power from the storage battery 29 to disconnect the fourth input terminal 48 and connect the third input terminal 47 and the second output terminal 49.

[0098] The number of thresholds is not limited to the above, and may be set according to, for example, the number of lights 18 (the number of groups to which power is supplied by the power lines 15), that is, the number of individual operation switching units 46. The order (priority) in which the individual operation switching units 46 perform switching is set according to the priority of the lights 18 connected to the individual operation switching units 46 that are controlled in conjunction with the thresholds. For example, if the lights 18 include standard approach lights, approach side row lights, and runway centerline lights, the first threshold is linked to the runway centerline lights, and the power supply is switched from the battery 29 to the commercial power supply 31 as quickly as possible. Next, the second threshold is linked to the standard approach lights, and the power supply source is switched.

[0099] The priority order of the multiple lights 18 mentioned above is predetermined by the designer or user of the lighting power supply system 6. Furthermore, the priority order can be changed as needed.

[0100] Furthermore, the individual operation switching unit 46 is not directly connected to the lights 18, but rather supplies power to each of the power lines 15 connected to the primary side of the multiple transformers 16, and power is supplied to the multiple lights 18 connected to the secondary side of the multiple transformers 16 that are paired with the primary side of the multiple transformers 16.

[0101] When the capacity monitoring unit 36 ​​detects that the remaining usable capacity of the storage battery 29 has become 0 or close to 0 (hereinafter referred to as the final threshold), it switches all individual operation switching units 46 to which the fourth input terminal and the second output terminal are connected so that the third input terminal and the second output terminal are connected. As a result, the power source for all the lights 18 becomes the commercial power supply 31.

[0102] The power planning unit 37 obtains the remaining capacity of the battery 29 after it has finished charging. The power planning unit 37 calculates the time during which power can be supplied to the lights 18 based on, for example, the remaining capacity of the battery 29, the information output by the operation planning device 3 and the image analysis device 4, and the information output by the weather monitoring system 5. The power planning unit 37 sets the start time and end time for lighting the lights 18 based on, for example, the information output by the operation planning device 3 and the image analysis device 4, and the weather information obtained from the weather monitoring system 5. The power planning unit 37 also calculates the time during which power can be supplied from the battery 29 based on the remaining capacity of the battery 29. The power planning unit 37 sets the switching time of the switching device 30 so that the power source for the lights 18 switches to commercial power when the time during which power can be supplied from the battery 29 has elapsed from the start time for lighting the lights 18.

[0103] Immediately before power supply to the lights 18 begins, the operation switching unit 42 connects the second input terminal 44 and the first output terminal 45. The individual operation switching unit 46 also connects the third input terminal 47 and the second output terminal 49. In this state, the UPS power supply 41 supplies power to the multiple lights 18.

[0104] The power supply planning unit 37 refers to the available power supply time and, upon detecting that a predetermined time (hereinafter referred to as the first time) has elapsed, controls the operation switching unit 42 to disconnect the second input terminal 44 and connect the first input terminal 43 and the first output terminal 45. As a result, the operation switching unit 42 enters a state where power is supplied from the commercial power supply 31.

[0105] When the power planning unit 37 detects that the remaining capacity of the battery 29 has fallen below the first time interval, it controls the multiple individual operation switching units to disconnect the third input terminal 47 and connect the fourth input terminal 48 and the second output terminal 49, except for at least one individual operation switching unit 46. As a result, at least one individual operation switching unit 46 is powered by the commercial power supply 31, while the remaining individual operation switching units 46 continue to be powered by the UPS power supply 41.

[0106] Next, when the power supply planning unit 37 detects that time has elapsed beyond the first time in the power supply available time and a predetermined time (hereinafter referred to as the second time) has arrived, it controls at least one of the individual operation switching units 46 that are receiving power from the storage battery 29 to disconnect the fourth input terminal 48 and connect the third input terminal 47 and the second output terminal 49.

[0107] The number of times the power planning unit 37 controls the individual operation switching unit 46 is not limited to the above, and may be set according to the number of individual operation switching units 46, for example. The order in which the individual operation switching units 46 perform switching is set according to a predetermined priority for each group of lights 18 supplied with power from each individual operation switching unit 46. For example, groups of lights 18 with a higher priority have their power switched from the UPS power supply 41 to the commercial power supply before other groups.

[0108] When the power supply planning unit 37 detects that it is time for the final switch during the power supply available period (hereinafter referred to as the final time), it switches all individual operation switching units 46, to which the fourth input terminal and the second output terminal are connected, to which the third input terminal and the second output terminal are connected. As a result, the power source for all the lights 18 becomes the commercial power supply 31.

[0109] The processing in the capacity monitoring unit 36 ​​and the power supply planning unit 37 are to be selectively performed by the user of the lighting power supply system 6 as appropriate, and parallel processing is not to be performed in principle. However, for example, if the remaining capacity of the battery 29 during the power supply available time calculated by the power supply planning unit 37 deviates from the expected value, the capacity monitoring unit 36 ​​may be configured to change its processing and switch the power supply from the battery 29 to the power supply from the commercial power supply 31 according to the remaining capacity of the battery 29.

[0110] As described above, the switching device 30 includes an operation switching unit 42 equipped with a first input terminal 43 to which power is supplied from a commercial power source 31, a second input terminal 44 to which power is supplied from a storage battery 29, and a first output terminal 45; a third input terminal 47 to which the output power of the first output terminal 45 is supplied; a fourth input terminal 48 to which power is supplied from the storage battery 29; and a second output terminal 49 to which power is supplied to each (or part) of the power lines 15 connected to the primary side of the multiple transformers 16.

[0111] The controller 35 includes a capacity monitoring unit 36 ​​that monitors the remaining capacity of the storage battery. When the remaining capacity of the storage battery 29 falls below a predetermined threshold, the capacity monitoring unit 36 ​​switches the output of the switching device 30 to power supplied from the commercial power supply 31.

[0112] Furthermore, the controller 35 includes a charge / discharge device 28 that charges the battery 29 using renewable energy, and a power supply planning unit 37 that calculates the power supply time of the battery 29 based on weather information supplied from an external source. The power supply planning unit 37 switches the output of the switching device 30 to power supplied from the commercial power supply 31 when the power supply time has elapsed since the start of power supply to the lights 18.

[0113] Furthermore, the controller 35 does not need to include both the capacity monitoring unit 36 ​​and the power planning unit 37; it is sufficient to include at least one of them.

[0114] Figure 12 is a time chart illustrating an example of the operation of the switching device shown in Figure 10. In Figure 12, the start time of lighting operation is denoted as T1, and any subsequent arbitrary timings are denoted as T2, T3, T4, T5, T6, and T7 in chronological order. The processing performed between the above timings is an example and does not limit the operation of the commercial power supply 31, the storage battery 29, and the controller 35.

[0115] At the start of lighting operation T1, the operation switching unit 42 of the switching device 30 is connected to the second input terminal 44 and the first output terminal 45, and all of the multiple individual operation switching units 46 are connected to the third input terminal 47 and the second output terminal 49. Therefore, at the start of lighting operation T1, the commercial power supply 31 does not supply power to the lights 18 and maintains a power supply stop state until timing T2. At the start of lighting operation T1, the storage battery 29 outputs discharged power to all lights 18 included in the airport lighting system 1 via the charge / discharge device 28.

[0116] At timing T2, the capacity monitoring unit 36 ​​of the controller 35 detects that the remaining capacity of the storage battery 29 is below a predetermined threshold C1. At this time, the controller 35 controls the switching device 30 so that power is supplied from the commercial power supply 31 to a portion of the power line 15. In other words, the controller 35 sets the operation switching unit 42 of the switching device 30 to a state where the first input terminal 43 and the first output terminal 45 are connected, and sets some of the multiple individual operation switching units 46 to a state where the fourth input terminal 48 and the second output terminal 49 are connected.

[0117] Therefore, between timing T2 and timing T3, the commercial power supply 31 supplies power to the lights 18 via some of the power lines 15, and the storage battery 29 outputs discharge power to the remaining lights 18 excluding the lights 18 to which the commercial power supply 31 supplies power via the power lines 15.

[0118] At timing T3, the capacity monitoring unit 36 of the controller 35 detects that the remaining capacity of the storage battery 29 has further decreased and is below a predetermined threshold value C2 (<C1). At this time, the controller 35 controls the switching device 30 to further increase the number of power lines 15 through which power is supplied from the commercial power supply 31. That is, the controller 35 sets the operation switching unit 42 of the switching device 30 to a state where the first input terminal 43 and the first output terminal 45 are connected, and sets a part of the plurality of individual operation switching units 46 where the third input terminal 47 and the second output terminal 49 are connected to a state where the fourth input terminal 48 and the second output terminal 49 are connected.

[0119] Therefore, between timing T3 and timing T4, the commercial power supply 31 supplies power to the lights 18 via a number of power lines 15 that is at least more than the number of power lines 15 through which power was supplied between timing T2 and timing T3. The storage battery 29 outputs discharge power to the remaining lights 18 excluding the lights 18 to which the commercial power supply 31 supplies power from timing T3 via the power lines 15.

[0120] The process between timing T4 and timing T5 is the same as the process between timing T3 and timing T4. The power supplied from the commercial power supply 31 to the lights 18 via the power lines 15 increases, and the discharge power output from the storage battery 29 to the lights 18 via the power lines 15 decreases.

[0121] At timing T6, the capacity monitoring unit 36 of the controller 35 detects that the remaining capacity of the storage battery 29 has further decreased and is below a predetermined threshold C3 (<C2). At this time, the controller 35 controls the switching device 30 so that power is supplied from the commercial power supply 31 to all the power lines 15. That is, the controller 35 sets the operation switching unit 42 of the switching device 30 in a state where the first input terminal 43 and the first output terminal 45 are connected, and sets all of the plurality of individual operation switching units 46 in a state where the third input terminal 47 and the second output terminal 49 are connected.

[0122] Therefore, between timing T5 and timing T6, the commercial power supply 31 supplies power to the lighting 18 via all the power lines 15. On the other hand, the discharge power output by the storage battery 29 becomes zero, and the discharge stops.

[0123] Between timing T6 and timing T7, the controller 35 continuously supplies power to the lighting 18 from the commercial power supply 31 by means of the switching device 30. The controller 35 controls the charge / discharge device to start the charging process of the storage battery 29 by the renewable energy power generation device or the like from timing T6. In principle, the storage battery 29 does not output discharge power to the lighting 18 during the charging process, but may output discharge power in parallel with the charging process, for example, when the power supply from the commercial power supply 31 is interrupted. Note that the processing after timing T7 repeats the same processing as that after timing T1.

[0124] As described above, according to the airport lighting system 1 of the present embodiment, in the lighting power supply system 6, the power supply of the lighting 18 can be switched between the storage battery 29 and the commercial power supply 31. When the remaining capacity of the storage battery 29 decreases, the lighting power supply system 6 switches to supply power from the commercial power supply 31 to the lighting 18, and charges the storage battery 29 again, so that the UPS power supply 41 including the storage battery 29 can be used as the main power supply source of the airport lighting system 1.

[0125] Furthermore, by using renewable energy as the charging method for the battery 29, it becomes possible to reduce the use of commercial power and lower operating costs. In addition, by monitoring the remaining capacity of the battery 29 or by calculating the power supply time in advance, it becomes possible to switch to commercial power 31 in stages, starting with the highest priority lights 18, and even if the remaining capacity of the battery 29 decreases, it is possible to maintain power supply to the highest priority lights 18.

[0126] Furthermore, according to the airport lighting system 1 of this embodiment, the lighting monitoring device 2, lighting power supply system 6, etc. acquire weather information and other information output from the weather monitoring system 5, thereby correcting the transmission timing of the modulated signal transmitted by the master station 13 according to the weather information, and reducing noise in the modulated signal. In addition, the airport lighting system 1 achieves a noise cancellation function by superimposing the inverse phase of the noise signal. This ensures the reliability of the airport lighting system 1.

[0127] As described above, the airport lighting system, power switching method, and program of this embodiment can keep the operating costs related to lighting the lights low.

[0128] While several embodiments of the present invention have been described, these embodiments are presented as examples only and are not intended to limit the scope of the invention. These novel embodiments can be carried out in a variety of other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims of the invention and its equivalents. The original claims of this application are included below. [C1] Storage batteries and A switching device that switches the output power between the discharge power of the storage battery and the power supplied from the commercial power source, A controller that uses the output power of the switching device at the start of lighting the light as the discharge power of the storage battery, and switches the switching device according to the remaining capacity of the storage battery, An airport lighting system comprising: multiple transformers, the primary side of which is connected to a power line powered by the power output from the aforementioned switching device, and which supply power taken from the secondary side to the lights. [C2] The system comprises multiple power lines, The switching device is, An operation switching unit comprising a first input terminal to which power is supplied from the commercial power supply, a second input terminal to which power is supplied from the storage battery, and a first output terminal, The airport lighting system according to C1, comprising a plurality of individual operation switching units, each having a third input terminal to which the output power of the first output terminal is supplied, a fourth input terminal to which power is supplied from the storage battery, and a second output terminal to which power is supplied to a portion of the power lines connected to the primary side of a plurality of transformers. [C3] The system includes a capacity monitoring unit that monitors the remaining capacity of the aforementioned storage battery, The airport lighting system according to C1, wherein the capacity monitoring unit switches the output of the switching device to power supplied from the commercial power source when the remaining capacity of the storage battery falls below a predetermined threshold. [C4] A charge / discharge device that charges the battery using renewable energy, The system includes a power planning unit that calculates the available power supply time for the battery based on weather information supplied from an external source, The airport lighting system according to C1, wherein the power supply planning unit switches the output of the switching device to power supplied from the commercial power source when the power supply available time has elapsed since the start of power supply to the lights. [C5] A charge / discharge device that charges the battery using renewable energy, A weather monitoring device that acquires weather information using sensors, A weather data management means that stores weather observation site information and the aforementioned weather information in a linked manner, A weather monitoring means for detecting weather anomalies from the aforementioned weather information, The airport lighting system according to C1, comprising: equipment monitoring means that generates a stop signal for a renewable energy power generation device based on weather observation site information corresponding to the weather information in which the anomaly was detected when the weather anomaly satisfies predetermined conditions. [C6] A substation is provided between the secondary side of the transformer and the lamp, A master station that communicates with the slave station via the power line, The aforementioned base station, A modulation unit generates a modulated signal by modulating the carrier signal with a multi-bit code using a modulation scheme that represents symbols using a combination of frequency shift and phase shift, The system includes an injection unit that injects the modulated signal into the power line in synchronization with the power supply cycle of the power, The aforementioned substation is A receiving unit that receives the modulated signal from the power waveform on the secondary side of the transformer, The system includes a demodulation unit that demodulates the received modulated signal and reproduces the code, The airport lighting system according to C1, wherein the master station corrects the modulated signal in accordance with weather information obtained from the weather monitoring system. [C7] A substation is provided between the secondary side of the transformer and the lamp, A master station that communicates with the slave station via the power line, The aforementioned base station, A modulation unit generates a modulated signal by modulating the carrier signal with a multi-bit code using a modulation scheme that represents symbols using a combination of frequency shift and phase shift, The system includes an injection unit that injects the modulated signal into the power line in synchronization with the power supply cycle of the power, The aforementioned substation is A receiving unit that receives the modulated signal from the power waveform on the secondary side of the transformer, The system includes a demodulation unit that demodulates the received modulated signal and reproduces the code, The airport lighting system according to C1, wherein the master station compares the frequency in the uninjected modulated signal section with the frequency in the modulated signal injection section which has the same period as the uninjected modulated signal section, and superimposes the inverse phase of the noise signal onto the modulated signal injection section. [C8] Storage batteries and A switching device that switches the output from power supplied from the aforementioned storage battery to power supplied from the commercial power source, A controller that switches the switching device according to the remaining capacity of the storage battery, The system comprises a plurality of transformers, the primary side of which is connected to a power line powered by the power output from the aforementioned switching device, and which supply power taken from the secondary side to a light fixture. The aforementioned switching device is An operation switching unit comprising a first input terminal to which power is supplied from the commercial power supply, a second input terminal to which power is supplied from the storage battery, and a first output terminal, A power switching method for a lighting power supply system comprising a plurality of individual operation switching units, each having a third input terminal to which the output power of the first output terminal is supplied, a fourth input terminal to which power is supplied from the storage battery, and a second output terminal to which power is supplied to a portion of the power lines connected to the primary side of a plurality of transformers, The aforementioned controller, Before the lighting of the aforementioned light, The first output terminal of the operation switching unit is connected to the second input terminal. The second output terminals of all of the multiple individual operation switching units are connected to the third input terminals. A power switching method comprising, after the start of lighting the aforementioned light, connecting the first output terminal of the operation switching unit to the first input terminal according to the remaining capacity of the storage battery, and connecting at least one of the second output terminals of the plurality of individual operation switching units to the fourth input terminal according to a preset priority order. [C9] The power switching method according to C8, wherein when the remaining capacity of the storage battery falls below a predetermined threshold, all of the second output terminals of the multiple individual operation switching units are connected to the third input terminal. [C10] A power switching program that instructs the computer to execute the power switching method described in C8. [Explanation of Symbols]

[0129] 1…Airport lighting system 2…Light monitoring device 3…Train planning system 4…Image analysis device 5… Weather monitoring systems 6…Lighting power system 7…LAN 8… Surveillance monitor 9…LAN 10... Main unit 11... Constant current power supply 12...Stabilizer 13…Master station 14…Bypass filter device 15…Power lines 16…trans 17... Substation 18...light 19… Weather monitoring server 20…Mechanisms for managing weather data 21... Engineering methods 22…Meteorological monitoring methods 23…Means of communication 24...Equipment monitoring means 25... Bus communication line 26... Wind power generation equipment 27…Solar power generation equipment 28…Charging / discharging device 29… Storage batteries 30… Switching device 31…Commercial power supply 32…Smart meter 33…High-voltage power receiving equipment 34…Distribution board 35…Controller 36...Capacity monitoring section 37…Power Planning Department 38…Generator 39... Constant voltage constant frequency device 40... Power lines 41…UPS power supply 42... Operation switching section 43…First input terminal 44…Second input terminal 45…First output terminal 46... Individual operation switching section 47…Third input terminal 48…Fourth input terminal 49…Second output terminal 50... Signal Processing Unit 51...Modem section 52...Modem section 53… Processor 54… Interface section 55...Waveform shaping section 56…Amplification section 57...Signal injection part 58…Power waveform acquisition section 59… Interface section 60… Processing Unit 61…Power line unit 62... Receiver 63…PLD 64… Processor 65...Sensor Interface 66... ​​Core breakage control unit 67...Transmission Control Unit 68...Transmitting circuit 69... Signal acquisition unit 70…Power supply acquisition section 71…Aircraft detection sensor 72… Weather monitoring equipment

Claims

1. Storage batteries and A switching device that switches the output power between the discharge power of the storage battery and the power supplied from the commercial power source, A controller that uses the output power of the switching device at the start of lighting the light as the discharge power of the storage battery, and switches the switching device according to the remaining capacity of the storage battery, Multiple transformers, whose primary side is connected to a power line powered by the power output from the aforementioned switching device, and which supply power taken from the secondary side to lights, Multiple power lines, Equipped with, The switching device is An operation switching unit comprising a first input terminal to which power is supplied from the commercial power supply, a second input terminal to which power is supplied from the storage battery, and a first output terminal, A plurality of individual operation switching units comprising: a third input terminal to which the output power of the first output terminal is supplied; a fourth input terminal to which power is supplied from the storage battery; and a second output terminal to which power is supplied to a portion of the power lines connected to the primary side of a plurality of transformers, An airport lighting system equipped with [specific features / features].

2. The system includes a capacity monitoring unit that monitors the remaining capacity of the aforementioned storage battery, The airport lighting system according to claim 1, wherein the capacity monitoring unit switches the output of the switching device to power supplied from the commercial power source when the remaining capacity of the storage battery falls below a predetermined threshold.

3. A charge / discharge device that charges the battery using renewable energy, The system includes a power planning unit that calculates the available power supply time for the battery based on weather information supplied from an external source, The airport lighting system according to claim 1, wherein the power supply planning unit switches the output of the switching device to power supplied from the commercial power source when the power supply available time has elapsed since the start of power supply to the lights.

4. A charge / discharge device that charges the battery using renewable energy, A weather monitoring device that acquires weather information using sensors, A weather data management means that stores weather observation site information and the aforementioned weather information in a linked manner, A weather monitoring means for detecting weather anomalies from the aforementioned weather information, The airport lighting system according to claim 1, further comprising: equipment monitoring means for generating a stop signal for a renewable energy power generation device based on weather observation site information corresponding to the weather information in which the anomaly was detected when the weather anomaly satisfies predetermined conditions.

5. A substation is provided between the secondary side of the transformer and the lamp, A master station that communicates with the slave station via the power line, The aforementioned base station, A modulation unit generates a modulated signal by modulating the carrier signal with a multi-bit code using a modulation scheme that represents symbols using a combination of frequency shift and phase shift, The system includes an injection unit that injects the modulated signal into the power line in synchronization with the power supply cycle of the power, The aforementioned substation is A receiving unit that receives the modulated signal from the power waveform on the secondary side of the transformer, The system includes a demodulation unit that demodulates the received modulated signal and reproduces the code, The airport lighting system according to claim 1, wherein the master station corrects the modulated signal in accordance with weather information obtained from the weather monitoring system.

6. Storage batteries and A switching device that switches the output from power supplied from the aforementioned storage battery to power supplied from the commercial power source, A controller that switches the switching device according to the remaining capacity of the storage battery, The system comprises a plurality of transformers, the primary side of which is connected to a power line powered by the power output from the aforementioned switching device, and which supply power taken from the secondary side to a light fixture. The aforementioned switching device is An operation switching unit comprising a first input terminal to which power is supplied from the commercial power supply, a second input terminal to which power is supplied from the storage battery, and a first output terminal, A power switching method for a lighting power supply system comprising a plurality of individual operation switching units, each having a third input terminal to which the output power of the first output terminal is supplied, a fourth input terminal to which power is supplied from the storage battery, and a second output terminal to which power is supplied to a portion of the power lines connected to the primary side of a plurality of transformers, wherein The aforementioned controller, Before the lighting of the aforementioned light, The first output terminal of the operation switching unit is connected to the second input terminal. The second output terminals of all of the multiple individual operation switching units are connected to the third input terminals. A power switching method comprising, after the start of lighting the aforementioned light, connecting the first output terminal of the operation switching unit to the first input terminal according to the remaining capacity of the storage battery, and connecting at least one of the second output terminals of the plurality of individual operation switching units to the fourth input terminal according to a preset priority order.

7. The power switching method according to claim 6, wherein when the remaining capacity of the storage battery falls below a predetermined threshold, all of the second output terminals of the plurality of individual operation switching units are connected to the third input terminal.

8. A power switching program that causes a computer to execute the power switching method described in claim 6.

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