A normal fire power supply system

Abstract

The application discloses a constant fire power supply system, which enables street lamp lines to continuously supply power for 5G small and micro base stations for 24 hours, and the constant fire power supply system comprises an RTU device, a voltage transformation control device, an intelligent management control device, 5G small and micro base stations / other Internet of Things devices, a communication module, a high-voltage alternating-current 400V power supply and a night mains 220V power supply; the constant fire power supply system adopts the original street lamp line 220V alternating-current power supply at night, when the street lamp control box disconnects the street lamp line 220V voltage in the daytime, the voltage transformation control device transforms the alternating-current 400V power supply in the street lamp box into a direct-current 36V safe voltage, and automatically switches the 36V safe voltage to the street lamp line for power supply, so as to supply power for the 5G small and micro base stations and other high-power Internet of Things devices in the daytime.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of power systems, and particularly relates to a constant fire power supply system. BACKGROUND

[0002] Mobile communication has become a basic information network connecting human society since its birth in the 1980s, and has experienced explosive growth for more than 30 years. 5G networking adopts the combination of macro stations and micro stations, and the original 4G macro station is used as the basis for 5G macro station coverage, and only a small amount of increase will be added on this basis. However, in order to meet the needs of various businesses, the site will be closer and closer to people, so the number of 5G small and micro base stations will increase geometrically. If the original base station construction method is still followed, it is difficult to realize the rapid construction of the 5G network in terms of cost and speed, and the overall power consumption of the 5G small and micro base stations is increased by several times compared with the original 4G small and micro base stations. If the iron lithium battery scheme is still used for power supply, because the power consumption is increased by several times, the number of lithium batteries also needs to be increased correspondingly, which will greatly increase the construction cost, and a large number of lithium batteries will also reduce the safety of the entire system, so the 5G small and micro base station urgently needs a stable power supply and a distributed intensive site resource, and the street lamp has two advantages of position and power supply system, which can solve the two biggest problems of 5G small and micro base station construction: distribution and power supply. SUMMARY

[0003] In order to solve the above problems, the application uses a new RTU, a voltage control device and an intelligent management control device to build a 24-hour constant fire power supply management system, so that the street lamp line can continuously supply power to the 5G small and micro base station for 24 hours, reduce the construction cost of the base station, and improve the speed of the base station construction. At the same time, the 24-hour constant fire power supply management system can also provide stable power supply for other high-power Internet of Things devices and monitoring devices, so that through the construction of the 24-hour constant fire power supply management system, the street lamp pole will become an important basic link of 5G network construction and smart city development, and the market prospect is very broad.

[0004] The application is a constant fire power supply system, which enables the street lamp line to continuously supply power to the 5G small and micro base station for 24 hours, and the constant fire power supply system comprises an RTU device, a voltage control device, an intelligent management control device, a 5G small and micro base station / other Internet of Things device, a communication module, a high-voltage alternating current 400V power supply and a night city power 220V power supply, the RTU device and the high-voltage alternating current 400V power supply are connected to the voltage control device, the voltage control device is connected to the intelligent management control device, the night city power 220V power supply is connected to the intelligent management control device, the intelligent management control device is bidirectionally connected with the 5G small and micro base station / other Internet of Things device, and the intelligent management control device is also bidirectionally connected with the communication module.

[0005] The constant fire power supply system adopts 220V AC power supply of the original street lamp line at night, when the street lamp control box disconnects the 220V voltage of the street lamp line, the voltage control device will convert the AC 400V power supply in the street lamp box into 36V safe voltage, and automatically switch the 36V safe voltage to the street lamp line for power supply, thereby supplying power to 5G small micro base station and other high-power Internet of Things equipment during the day;

[0006] The RTU device converts the AC 400V voltage into 36V safe voltage when the street lamp line is powered off during the day;

[0007] The intelligent management control device automatically detects the current power supply property and voltage amplitude of the line, and controls different devices to supply power to 5G small micro base station and other Internet of Things equipment according to different voltages;

[0008] The intelligent management control device receives the RTU remote control instruction through the communication module, and can upload the state and power consumption of 5G small micro base station and other Internet of Things equipment to the background control software.

[0009] Further, the RTU device has a wireless communication interface and can control the line power supply on-off according to the remote instruction.

[0010] Further, the intelligent management control device has a wireless communication interface and a backup lithium battery, can automatically detect the line voltage state and complete the distribution, automatically detect the line fault and complete the reporting, automatically detect the state and power consumption of 5G small micro base station and other Internet of Things equipment and report, and can control the intelligent control terminal of the street lamp switch in real time; through cooperation with the RTU and the voltage control device, 24-hour constant fire power supply of the street lamp line is realized.

[0011] Further, the RTU device and the intelligent management control device adopt 4G and LoRa double communication mechanism.

[0012] Further, the constant fire power supply system circuit includes a base station power supply switching cabinet part and a base station power supply part, and the base station power supply switching cabinet part control circuit includes a relay KM1, a relay KM2, a relay 1KM, a circuit breaker QF1, a circuit breaker QF2, a circuit breaker QF3, a circuit breaker QF, a time relay KA1, a time relay KA2 and an AC / DC conversion module.

[0013] Further, the relay KM1 and the relay KM2 realize electrical interlocking; when it is needed to switch from the alternating current power supply to the direct current power supply, QF1,1KM is closed, the time relay KA1 and KA2 coil is de-energized, KA1 normally open point is momentarily disconnected, KA2 normally closed point is closed after 2S delay, to ensure that KM2 is closed after KM1 is completely disconnected; when it is needed to switch from the direct current power supply to the alternating current power supply, 1KM is attracted, the time relay KA1 and KA2 coil is energized, KA2 normally closed point is momentarily disconnected, KA1 normally open point is closed after 2S delay, to ensure that KM1 is closed after KM2 is completely disconnected.

[0014] Further, the base station power supply part includes a DSP controller, a half-bridge DCDC converter, a filter, an EMI auxiliary power supply, a power factor correction module, a BOOST boost module, an alarm and fault output module, an RS485 communication module and an LED display module.

[0015] The beneficial effects of the present application are: through the construction of the 24-hour constant fire power supply management system, the street lamp pole will become an important basic link of 5G network construction and smart city development, and the market prospect is very broad; the intelligent management control equipment can implement monitoring on the state and power consumption of the small micro base station mounted on the street lamp pole, and can also uniformly manage the power supply of the Internet of Things equipment mounted thereon. Therefore, the equipment power consumption is optimized, resources are saved, and charges can be made according to time and quantity, creating huge benefits. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the constant fire power supply system of the present application;

[0017] Figure 2 It is a line connection schematic diagram of the constant fire power supply system of the present application;

[0018] Figure 3 It is an electrical schematic diagram of the base station power supply switching cabinet of the present application;

[0019] Figure 4 It is a principle block diagram of the base station power supply of the present application. DETAILED DESCRIPTION

[0020] The specific implementation of the constant fire power supply system of the present application will be described in detail below in combination with the drawings.

[0021] As Figure 1As shown, the present application is a constant fire power supply system, which enables the street lamp line to continuously supply power to the 5G small micro base station for 24 hours. The constant fire power supply system comprises an RTU device, a voltage conversion control device, an intelligent management control device, a 5G small micro base station / other Internet of Things device, a communication module, a high-voltage alternating current 400V power supply and a night city power supply 220V. The RTU device and the high-voltage alternating current 400V power supply are connected to the voltage conversion control device. The voltage conversion control device is connected to the intelligent management control device. The night city power supply 220V is connected to the intelligent management control device. The intelligent management control device is bidirectionally connected with the 5G small micro base station / other Internet of Things device. The intelligent management control device is also bidirectionally connected with the communication module. The constant fire power supply system uses the original street lamp line 220V alternating current power supply at night. When the street lamp control box disconnects the street lamp line 220V voltage during the day, the voltage conversion control device converts the alternating current 400V power supply in the street lamp box into a safe direct current 36V voltage, and automatically switches the 36V safe voltage to the street lamp line for power supply, thereby supplying power to the 5G small micro base station and other high-power Internet of Things devices during the day. The RTU device controls the voltage conversion control device to convert the alternating current 400V voltage into a 36V safe voltage when the street lamp line is powered off during the day. The intelligent management control device automatically detects the current power supply properties and voltage amplitude of the line, and controls different devices to supply power to the 5G small micro base station and other Internet of Things devices according to the different voltages. The intelligent management control device receives the RTU remote control instructions through the communication module, and uploads the state and power consumption of the 5G small micro base station and other Internet of Things devices to the background control software.

[0022] The existing street lamp power supply system implements a night power supply and day power-off scheme for safety and maintenance considerations. The present application can construct a safe and reliable constant fire power supply system through a new RTU, a voltage conversion control device and an intelligent management control device. At night, the 5G small micro base station still uses the original street lamp line 220V for power supply, without changing the original street lamp night maintenance mode. When the street lamp control box disconnects the street lamp line 220V voltage during the day, the voltage conversion control device converts the alternating current 400V in the street lamp box into a safe direct current 36V voltage, and automatically switches the 36V safe voltage to the street lamp line for power supply, thereby supplying power to the 5G small micro base station and other high-power Internet of Things devices during the day. In summary, the street lamp line is supplied with 36V direct current during the day and 220V alternating current at night. In order to facilitate the mounting of the 5G small micro base station and other high-power Internet of Things devices, the intelligent management device of the system automatically detects the current power supply properties and voltage amplitude of the line, and automatically calls the corresponding module to supply power to the 5G small micro base station or other high-power devices. At the same time, the intelligent management control device can also control the on-off of the street lamp. When the street lamp line is supplied with 36V during the day, the sodium lamp will not flicker.

[0023] At the same time, the new RTU and intelligent management control device adopt 4G and LoRa dual communication mechanism, the intelligent management control device will monitor the street lamp line in real time, when the line failure or related safety problems are found, it can send instructions to the new RTU in time, and the control RTU will report the related failure, and for emergency, the RTU will control the related equipment to be powered off. The intelligent management control device itself has a backup lithium battery, which can also continuously monitor the related line under power failure, and immediately notify the new RTU when the fault is found and eliminated, and the RTU will control the related equipment to power the related line again, so as to improve the safety and reliability of the whole street lamp line, and facilitate the fault maintenance of the street lamp. At the same time, the intelligent management control device can monitor the state and power consumption of the small micro base station mounted on the street lamp pole, and can also uniformly manage the power supply of the Internet of Things equipment mounted thereon.

[0024] The normal fire power supply management system is composed of base station power switching cabinet (street lamp distribution box side) and base station power (street lamp side), as shown in Figure 2 .

[0025] Table 1: Composition of normal fire power supply management system

[0026]

[0027] The electrical schematic diagram of the base station power switching cabinet is shown in Figure 3 , which is controlled by the street lamp controller signal in the street lamp distribution box.

[0028] (1) AC to DC

[0029] When 1KM is closed, the time relay KA1 and KA2 coil loses power, KA1 normally open point is momentarily disconnected, and KA2 normally closed point is closed after 2S delay, so as to ensure that KM2 is closed after KM1 is completely disconnected.

[0030] (2) DC to AC

[0031] When 1KM is closed, the time relay KA1 and KA2 coil loses power, KA1 normally open point is momentarily disconnected, and KA2 normally closed point is closed after 2S delay, so as to ensure that KM2 is closed after KM1 is completely disconnected.

[0032] (3) KM1 and KM2 electrical interlocking.

[0033] (4) Device performance:

[0034] Built-in active PFC, power factor > 0.95, efficiency up to 91%; multiple protection modes such as short circuit protection / overload protection / overvoltage protection / overheating protection / fan alarm; output voltage can be dynamically adjusted; output current can be dynamically adjusted.

[0035] The principle block diagram of the base station power supply is shown in Figure 4

[0036] (1) Input power on

[0037] The auxiliary power supply of the whole system is provided by the battery. When the auxiliary power supply is normal, the DSP control system starts to work. The voltage state of A, B, C and N lines is judged through three-phase alternating current input voltage detection and a direct current input voltage detection to select the relay pair that needs to be closed to supply power to the rear circuit.

[0038] (2) AC-DC output

[0039] In the initial state, all relays are open. When the DSP control system judges that the input is alternating current, the alternating current relay is closed. The DSP control system controls the AC-DC power supply to start working. At the same time, the battery management (including equalizing charging, floating charging, protection and other functions) is performed according to the battery voltage and the charging and discharging state.

[0040] (3) DC-DC output

[0041] When the DSP control system judges that the input is direct current, the direct current relay is closed. The DSP control system controls the DC-DC power supply to start working. At the same time, the battery management (including equalizing charging, floating charging, protection and other functions) is performed according to the battery voltage and the charging and discharging state.

[0042] (4) Input AC-DC conversion

[0043] 1) Input AC-AC (phase missing or over / under voltage), assuming that the current power supply is A phase and the closed relay is S1. When the DSP detects that the A phase voltage is any one of 0, under voltage or over voltage, the currently closed relay S1 is controlled to be open. The AC-DC enters the shutdown process. At the same time, the B phase and C phase alternating current voltages are detected. Through the established control strategy, S2 or S3 is selected to be closed. Then the AC-DC startup process is restarted.

[0044] 2) Input AC-DC (AC power off, DC power on), assuming that the current power supply is A phase and the closed relay is S1. When the DSP detects that the A phase voltage is 0, the currently closed relay S1 is controlled to be open. The AC-DC enters the shutdown process. At the same time, it is detected that the three-phase alternating current voltage is 0 and the direct current voltage reaches the power supply state. Through the established control strategy, S4, S5 and S6 are closed in turn. Then the DC-DC startup process is started.

[0045] ​3) Input DC to AC (DC power off, AC power on), assuming the current state is DC power supply, then S1, S2, S3 are open, S4, S5, S6 are closed, when the DSP detects that the DC power supply voltage drops to 0, control the currently closed relay S4, S5, S6 to open, DC-DC enters the shutdown process, then detects A, B, C three-phase AC voltage, when at least one phase reaches the power supply state, through the established control strategy, close one of S1, S2, S3 to close, and then start the AC-DC startup process.

[0046] (5) No input voltage

[0047] When the DSP detects no AC input and DC input, all input relays are opened, the rear power supply is shut down, and according to the established control strategy, it can be selected whether to supply power to the load by the battery.

[0048] (6) State reporting and control

[0049] All power supply working states (protection functions), alarms and faults can be reported in the form of dry contacts or 485 communication according to their importance levels, and the states of the power supply can be set and controlled by the upper computer within the specification range.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them. Those skilled in the art should understand that the specific embodiments of the present application can be modified or replaced by equivalents, and these modifications or changes are within the scope of protection of the claims.

Claims

1. A normal fire power supply system characterized by comprising: The constant fire power supply system enables the street lamp line to continuously supply power to the 5G small micro base station for 24 hours, and the constant fire power supply system comprises an RTU device, a voltage conversion control device, an intelligent management control device, a 5G small micro base station, a communication module, a high-voltage alternating-current 400V power supply and a night city power supply 220V, the RTU device and the high-voltage alternating-current 400V power supply are connected to the voltage conversion control device, the voltage conversion control device is connected to the intelligent management control device, the night city power supply 220V is connected to the intelligent management control device, the intelligent management control device is bidirectionally connected with the 5G small micro base station, and the intelligent management control device is also bidirectionally connected with the communication module. The constant fire power supply system adopts the original 220V alternating-current power supply of the street lamp line at night, when the street lamp control box disconnects the 220V voltage of the street lamp line in the daytime, the voltage conversion control device converts the alternating-current 400V power supply in the street lamp box into a direct-current 36V safe voltage, and automatically switches the 36V safe voltage to the street lamp line for power supply, thereby supplying power to the 5G small micro base station in the daytime. The RTU device controls the voltage conversion control device to convert the alternating-current 400V voltage into a 36V safe voltage when the street lamp line is powered off in the daytime. The intelligent management control device automatically detects the current power supply property and voltage amplitude of the line, and controls different devices to supply power to the 5G small micro base station according to different voltages. The intelligent management control device receives the RTU remote control instruction through the communication module, and can upload the state and power consumption of the 5G small micro base station to the background control software. The constant fire power supply system circuit comprises a base station power supply switching cabinet part and a base station power supply part, the base station power supply switching cabinet part control circuit comprises a relay KM1, a relay KM2, a relay 1KM, a circuit breaker QF1, a circuit breaker QF2, a circuit breaker QF3, a circuit breaker QF, a time relay KA1, a time relay KA2 and an AC / DC conversion module; the coils of the time relays KA1 and KA2 are connected in parallel, and then connected in series with the normally open contact of the relay 1KM, and then connected to the A-phase line through the circuit breaker QF2; the coil of the relay KM1 is connected in series with the normally closed contact of the relay KM2 and the normally open contact of the time relay KA1, and then connected to the A-phase line through the circuit breaker QF2; the coil of the relay KM2 is connected in series with the normally closed contact of the relay KM1 and the normally open contact of the time relay KA2, and then connected to the A-phase line through the circuit breaker QF2; the time relays KA1, KA2, the relays KM1 and KM2 are connected in parallel, and then connected to the N point through the circuit breaker QF2; the relay 1KM, the circuit breaker QF and the relay KM1 are connected in series between the three-phase line and the base station power supply part; the circuit breaker QF1, the AC / DC conversion module, the circuit breaker QF3 and the relay KM2 are connected in series and connected in parallel to the A-phase line, and connected to the base station power supply part.

2. A normal fire power supply system according to claim 1, characterized in that The RTU device has a wireless communication interface and can control the line power supply on / off according to the remote instruction.

3. A constant power supply system according to claim 1, wherein The intelligent management control device has a wireless communication interface, a backup lithium battery, can automatically detect the line voltage state and complete distribution, automatically detect line faults and complete reporting, automatically detect the state and power consumption of the 5G small micro base station and report, and can control the intelligent control terminal of the street lamp switch in real time; through cooperation with the RTU and the voltage control device, 24-hour constant fire power supply of the street lamp line is realized.

4. A constant power supply system according to claim 1, wherein The RTU device and the intelligent management control device adopt 4G and LoRa double communication mechanisms.

5. A constant power supply system according to claim 1, wherein The relay KM1 and the relay KM2 realize electrical interlocking; when it is necessary to switch from an alternating current power supply to a direct current power supply, QF1,1KM is closed, the time relay KA1 and KA2 coils lose power, the KA1 normally open point is momentarily disconnected, and the KA2 normally closed point is closed after a delay of 2S to ensure that KM2 is closed after KM1 is completely disconnected; when it is necessary to switch from a direct current power supply to an alternating current power supply, 1KM is attracted, the time relay KA1 and KA2 coils are powered, the KA2 normally closed point is momentarily disconnected, and the KA1 normally open point is closed after a delay of 2S to ensure that KM1 is closed after KM2 is completely disconnected.

6. A constant power supply system according to claim 1, wherein The base station power supply part includes a DSP controller, a half-bridge DCDC converter, a filter, an EMI auxiliary power supply, a power factor correction module, a BOOST boost module, an alarm and fault output module, an RS485 communication module and an LED display module; the filter, the power factor correction module and the half-bridge DCDC converter are sequentially connected, the filter, the BOOST boost module and the half-bridge DCDC converter are sequentially connected, and the DSP controller is connected with the power factor correction module, the BOOST boost module, the half-bridge DCDC converter, the EMI auxiliary power supply, the alarm and fault output module, the RS485 communication module and the LED display module respectively; (1) Input power-on The auxiliary power supply of the entire system is provided by the battery of the EMI auxiliary power supply. When the auxiliary power supply is normal, the DSP control system starts to work, judges the voltage state on the A, B, C and N lines through three-phase alternating current input voltage detection and one-way direct current input voltage detection, and selects the relay pair that needs to be closed to supply power to the rear circuit; (2) AC to DC output In the initial state, all relays are disconnected. When the DSP control system judges that the input is alternating current, the alternating current relay is closed, the DSP control system controls the alternating current to direct current power supply to start working, and at the same time, the battery management is carried out according to the battery voltage and the charge and discharge state; (3) DC to DC output When the DSP control system judges that the input is direct current, the direct current relay is closed, the DSP control system controls the direct current to direct current power supply to start working, and at the same time, the battery management is carried out according to the battery voltage and the charge and discharge state; (4) Input AC / DC conversion 1) AC input, AC output, assuming the current power supply is A phase, the closed relay is S1, when the DSP detects any one of the three conditions of A phase voltage 0, under-voltage or over-voltage, control the current closed relay S1 to open, AC-DC into the shutdown process, while detecting B and C phase AC voltage, through the established control strategy, to select S2 or S3 closed, and then start AC-DC start-up process again; 2) AC input, DC output, assuming the current power supply is A phase, the closed relay is S1, when the DSP detects A phase voltage 0, control the current closed relay S1 to open, AC-DC into the shutdown process, detecting three-phase AC voltage is 0, while detecting DC voltage to power supply state, through the established control strategy, in turn S4, S5, S6 closed, and then start DC-DC start-up process; 3) DC input, AC output, assuming the current is DC power supply state, then S1, S2, S3 are open, S4, S5, S6 are closed, when the DSP detects the DC supply voltage drops to 0, control the current closed relay S4, S5, S6 to open, DC-DC into the shutdown process, then detecting A, B, C three-phase AC voltage, when at least one phase to power supply state, through the established control strategy, close S1, S2, S3 one of the relays, and then start AC-DC start-up process; (5) no input voltage When the DSP detects no AC input and DC input, open all input relays, the rear power supply shutdown, according to the established control strategy, whether to select the battery to power the load; (6) state reporting and control All power supply working state, alarm and failure can be reported according to its importance level with dry contact or 485 communication, while the power supply state can be set and controlled by the host computer within the specification range.

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