Marine converter station emergency lighting power supply system and method

Abstract

The application relates to an offshore converter station emergency lighting power supply system and method, which comprises a direct-current power supply module, an alternating-current power supply module, a photovoltaic energy storage module, an emergency lighting distribution module, an emergency evacuation lighting module and an obstacle lighting module; the alternating-current power supply module generates 380V alternating current, which not only supplies power to alternating-current load equipment, but also supplies power to the direct-current power supply module and the emergency lighting distribution module. The direct-current power supply module is responsible for converting the 380V alternating current into 220V direct current to supply direct-current load equipment, and can store electric energy or inversely convert 220V alternating current to supply the emergency lighting distribution module. The photovoltaic energy storage module generates 110V direct current, also has the functions of energy storage and inversion, and converts the 110V direct current into 110V alternating current to supply the obstacle lighting module. The emergency lighting distribution module can switch the 380V alternating current output of the alternating-current power supply module and the 220V alternating current output of the direct-current power supply module, and ensures the stability of power supply. The application fully utilizes various energy forms, and improves the flexibility and reliability of the system.

Description

TECHNICAL FIELD

[0001] The application relates to an offshore converter station emergency lighting power supply system and method, and belongs to the technical field of flexible direct-current power transmission. BACKGROUND

[0002] Emergency lighting is divided into emergency evacuation lighting and emergency standby lighting. Emergency evacuation lighting provides indication and lighting for personnel to identify and use evacuation channels when a fire or other dangerous situation occurs. Emergency standby lighting is used to ensure that the fire control room and other places need to continue to work after a fire or other dangerous situation occurs to ensure smooth operation. The continuous power supply time of emergency evacuation lighting of a land flexible direct-current converter station should not be less than 0.5h, and the continuous power supply time of continued work emergency lighting should not be less than 3h. Unlike the requirements of land flexible direct-current converter stations for emergency lighting power supply, the Offshore Converter Station Design Specification for Wind Farm Engineering implemented in November 2024 requires that the emergency lighting power supply duration of an offshore converter station should not be less than 18h.

[0003] An offshore flexible direct-current converter station is a marine facility. According to the Offshore Converter Station Design Specification for Wind Farm Engineering, the International Regulations for Preventing Collisions require that the power supply duration of navigation lights, signal lights and sound signals of an offshore converter station in an emergency working condition should not be less than 4d. The power supply duration of signal lights, obstruction lights and sound signals indicating the outer contour of a building in an emergency working condition should not be less than 4d. It can be seen that the emergency lighting power supply of an offshore flexible direct-current converter station is greatly expanded in terms of duration and coverage compared with a land converter station, and the newly added obstruction lighting and sound signal load in days brings a new challenge.

[0004] The patent file with the patent number "CN119010319A" discloses a power supply control device and method for an energy storage system. The device has the following problems: it mainly relies on an auxiliary alternating current power supply module and a UPS alternating current power supply module, although it ensures the stability of the power supply, it is relatively single in energy utilization, and lacks sustainability and diversity. Although a stable power supply control scheme is provided, there may be certain limitations in emergency response. For example, in the event of a sudden failure of the main power supply, it may take a long time to switch to the backup power supply. SUMMARY

[0005] In order to solve the problems existing in the prior art, the application provides an offshore converter station emergency lighting power supply system and method.

[0006] The technical scheme of the application is as follows:

[0007] On the one hand, the application provides an offshore converter station emergency lighting power supply system, which comprises a direct-current power supply module, an alternating-current power supply module, a photovoltaic energy storage module, an emergency lighting power distribution module, an emergency evacuation lighting module and an obstruction lighting module.

[0008] The output end of the alternating current power supply module is connected with the input end of the direct current power supply module and the input end of the emergency lighting distribution module respectively, the output end of the direct current power supply module is connected with the input end of the emergency lighting distribution module, the output end of the emergency lighting distribution module is connected with the input end of the emergency evacuation lighting module and the input end of the obstacle lighting module respectively, and the output end of the photovoltaic energy storage module is connected with the input end of the obstacle lighting module;

[0009] The alternating current power supply module is used for generating 380V alternating current to supply power to alternating current load equipment and transmitting 380V alternating current to the direct current power supply module and the emergency lighting distribution module;

[0010] The direct current power supply module is used for rectifying 380V alternating current transmitted by the alternating current power supply module into 220V direct current to supply power to direct current load equipment, storing 220V direct current and inverting 220V direct current into 220V alternating current to transmit to the emergency lighting distribution module;

[0011] The photovoltaic energy storage module is used for generating 110V direct current, storing 110V direct current and inverting 110V direct current into 110V alternating current to transmit to the obstacle lighting module;

[0012] The emergency lighting distribution module is used for switching 380V alternating current transmitted by the alternating current power supply module and 220V alternating current transmitted by the direct current power supply module.

[0013] As a preferred embodiment, the alternating current power supply module comprises a 380V low-voltage distribution screen cabinet;

[0014] The 380V low-voltage distribution screen cabinet is internally provided with a 380V alternating current bus, the 380V alternating current bus is connected with the diesel generator through a first low-voltage alternating current circuit breaker, the 380V alternating current bus is connected with a low-voltage side of a station transformer through a second low-voltage alternating current circuit breaker, and the 380V alternating current bus is connected with alternating current load equipment through a third low-voltage alternating current circuit breaker;

[0015] The 380V alternating current bus is connected with the input end of the direct current power supply module through a fourth low-voltage alternating current circuit breaker;

[0016] The 380V alternating current bus is connected with the input end of the emergency lighting distribution module through a fifth low-voltage alternating current circuit breaker.

[0017] As a preferred embodiment, the direct current power supply module comprises a direct current distribution screen, a first rectifier module, a lead-acid storage battery and a first inverter module;

[0018] The direct current distribution screen is internally provided with a 220V direct current bus;

[0019] The fourth low-voltage alternating current breaker is connected with the alternating current end of the first rectifier module through a sixth low-voltage alternating current breaker, and the direct current end of the first rectifier module is connected with the 220V direct current bus through a seventh low-voltage direct current breaker;

[0020] The 220V direct current bus is connected with the lead-acid storage battery through an eighth low-voltage direct current breaker, and the 220V direct current bus is connected with the direct current load device through a ninth low-voltage direct current breaker;

[0021] The 220V direct current bus is connected with the direct current end of the first inverter module through a tenth low-voltage direct current breaker, and the alternating current end of the first inverter module is connected with the input end of the emergency lighting power distribution module through an eleventh low-voltage alternating current breaker.

[0022] As a preferred embodiment, the photovoltaic energy storage module comprises a photovoltaic cell, a first lithium iron phosphate battery and a second inverter module;

[0023] The output end of the photovoltaic cell is connected with the 110V direct current bus through a twelfth low-voltage direct current breaker, and the first lithium iron phosphate battery is connected with the 110V direct current bus through a thirteenth low-voltage direct current breaker;

[0024] The direct current end of the second inverter module is connected with the 110V direct current bus through a fourteenth low-voltage direct current breaker, and the alternating current end of the second inverter module is connected with the input end of the obstacle lighting module through a fifteenth low-voltage alternating current breaker.

[0025] As a preferred embodiment, the emergency lighting power distribution module comprises a first power supply switching device;

[0026] The main power supply input end of the first power supply switching device is connected with the 380V alternating current bus through a fifth low-voltage alternating current breaker, and the standby power supply input end of the first power supply switching device is connected with the alternating current end of the first inverter module through an eleventh low-voltage alternating current breaker;

[0027] The output end of the first power supply switching device is connected with the 220V emergency lighting bus, the 220V emergency lighting bus is connected with the input end of the emergency evacuation lighting module through a sixteenth low-voltage alternating current breaker, the 220V emergency lighting bus is connected with the 220V emergency standby lighting load through a seventeenth low-voltage alternating current breaker, and the 220V emergency lighting bus is connected with the input end of the obstacle lighting module through an eighteenth low-voltage alternating current breaker.

[0028] As a preferred embodiment, the emergency evacuation lighting module comprises a second lithium iron phosphate battery and a second rectifier module;

[0029] The sixteenth low-voltage alternating current circuit breaker is connected with the AC end of the second rectifier module through the nineteenth low-voltage alternating current circuit breaker, and the DC end of the second rectifier module is connected with the 36V emergency lighting bus through the twentieth low-voltage DC circuit breaker;

[0030] The 36V emergency lighting bus is connected with the second lithium iron phosphate battery through the twenty-first low-voltage DC circuit breaker, and the 36V emergency lighting bus is connected with the emergency evacuation lighting load through the twenty-second low-voltage DC circuit breaker.

[0031] As a preferred embodiment, the obstacle lighting module comprises a second power switching device;

[0032] The main power input end of the second power switching device is connected with the 220V emergency lighting bus through the eighteenth low-voltage alternating current circuit breaker, and the standby power input end of the second power switching device is connected with the AC end of the second inverter module through the fifteenth low-voltage alternating current circuit breaker;

[0033] The output end of the second power switching device is connected with the 220V obstacle lighting bus, the 220V obstacle lighting bus is connected with the obstacle lamp through the twenty-third low-voltage alternating current circuit breaker, the 220V obstacle lighting bus is connected with the navigation lamp through the twenty-fourth low-voltage alternating current circuit breaker, the 220V obstacle lighting bus is connected with the signal lamp through the twenty-fifth low-voltage alternating current circuit breaker, and the 220V obstacle lighting bus is connected with the sound signal through the twenty-sixth low-voltage alternating current circuit breaker.

[0034] In still another aspect, the application further provides a method for emergency lighting power supply of a marine converter station, comprising the following steps:

[0035] An AC power supply module is constructed, which is used to generate 380V AC power to supply power to AC load equipment and transmit the 380V AC power to a DC power supply module and an emergency lighting power distribution module;

[0036] A DC power supply module is constructed, which is used to rectify the 380V AC power transmitted by the AC power supply module into 220V DC power to supply power to DC load equipment, and store the 220V DC power and invert it into 220V AC power to transmit to the emergency lighting power distribution module;

[0037] A photovoltaic energy storage module is constructed, which is used to generate 110V DC power, and store the 110V DC power and invert it into 110V AC power to transmit to the obstacle lighting module;

[0038] An emergency lighting power distribution module is constructed, which is used to switch the output of the 380V AC power transmitted by the AC power supply module and the 220V AC power transmitted by the DC power supply module;

[0039] The emergency evacuation lighting module is used for emergency evacuation lighting, and the obstacle lighting module is used for obstacle lighting.

[0040] The output ends of the alternating current power supply module are connected with the input ends of the direct current power supply module and the input ends of the emergency lighting distribution module respectively, the output end of the direct current power supply module is connected with the input end of the emergency lighting distribution module, the output end of the emergency lighting distribution module is connected with the input ends of the emergency evacuation lighting module and the obstacle lighting module respectively, and the output end of the photovoltaic energy storage module is connected with the input end of the obstacle lighting module.

[0041] The application has the following beneficial effects:

[0042] 1、The application combines various energy forms such as alternating current power supply module, direct current power supply module and photovoltaic energy storage module, so that the system can quickly switch to the standby power supply when the main power supply fails, ensuring the continuous power supply of emergency lighting and obstacle lighting. The system design allows switching between different power supply modules to adapt to different emergency situations and power supply requirements, improving the adaptability and flexibility of the system. In emergency situations such as fire, emergency evacuation lighting and emergency standby lighting can provide necessary lighting and indication for personnel, ensuring personnel safety evacuation, and ensuring the lighting of critical operation areas such as fire control room is uninterrupted. The emergency lighting distribution module can quickly switch to the standby power supply when the main power supply fails, ensuring the continuous power supply of the emergency lighting system. This rapid response capability is crucial for key facilities such as offshore converter stations, which can provide necessary lighting for personnel evacuation and fire operation in emergency situations, thereby ensuring personnel safety.

[0043] 2、The application selects valve-regulated lead-acid batteries widely used in power engineering, mature in technology and good in economy as the energy storage batteries of the direct current power supply module; for the emergency evacuation lighting module and the obstacle lighting module with smaller load, lithium iron phosphate batteries are selected as the energy storage batteries, which meet the power supply requirements while reducing costs.

[0044] 3、The power supply switching time of the first power supply switching device and the second power supply switching device is within 400ms, and short-term parallel operation is allowed during switching, meeting the requirements of uninterrupted switching and ensuring the continuity of power supply.

[0045] 4、The diesel generator, large-capacity battery group (valve-regulated lead-acid battery, lithium iron phosphate battery) and photovoltaic energy storage work together to meet the power supply time length standard of 18 hours for emergency lighting and 4 days for obstacle lighting in offshore converter stations. The power supply time length of the lithium iron phosphate battery of the emergency evacuation lighting system is not less than 1 hour; the power of the lithium iron phosphate battery in the photovoltaic energy storage system of the obstacle lighting system is considered to be not less than 4 days, and the photovoltaic cell and the lithium iron phosphate battery can supply power to the obstacle lighting system for several months.

[0046] 5、The system of the present application covers the power supply of multiple loads such as emergency evacuation lighting, emergency backup lighting, navigation lights, signal lights, sound signals, signal lights marking the outer contour of a building, and obstruction lights, etc. Compared with the onshore converter station, the power supply time and coverage are greatly expanded.

[0047] 6、The present application formulates a detailed and intelligent power switching logic. When the AC power supply module fails and loses power, the first power switching device switches to the DC power supply module first. If the low-voltage side of the station transformer recovers power supply within 1 hour, it will be switched back, otherwise the diesel generator will be started. In this way, the frequent start-stop of the diesel generator when the low-voltage side of the station transformer loses power for a short time can be avoided, the system operation is optimized, and the equipment life is improved. BRIEF DESCRIPTION OF DRAWINGS

[0048] Figure 1 The wiring diagram of the system of the present application. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0050] It should be understood that the step numbers used herein are only for the convenience of description, and are not limited to the execution sequence of the steps.

[0051] It should be understood that the terms used in the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the present application specification and the appended claims, unless otherwise clear from the context, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0052] The terms "comprise" and "include" indicate the presence of described features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or collections thereof.

[0053] The term "and / or" means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0054] Embodiment one:

[0055] In this embodiment, the first low-voltage AC circuit breaker is Z1 in Figure 1 , and the second low-voltage AC circuit breaker isFigure 1 Z2 in the third low-voltage AC circuit breaker is Figure 1 Z3 in the fourth low-voltage AC circuit breaker is Figure 1 Z4 in the fifth low-voltage AC circuit breaker is Figure 1 Z5 in the sixth low-voltage AC circuit breaker is Figure 1 Z6 in the seventh low-voltage DC circuit breaker is Figure 1 Z7 in the eighth low-voltage DC circuit breaker is Figure 1 Z8 in the ninth low-voltage DC circuit breaker is Figure 1 Z9 in the tenth low-voltage DC circuit breaker is Figure 1 Z10 in the eleventh low-voltage AC circuit breaker is Figure 1 Z11 in the twelfth low-voltage DC circuit breaker is Figure 1 Z12 in the thirteenth low-voltage DC circuit breaker is Figure 1 Z13 in the fourteenth low-voltage DC circuit breaker is Figure 1 Z14 in the fifteenth low-voltage AC circuit breaker is Figure 1 Z15 in the sixteenth low-voltage AC circuit breaker is Figure 1 Z16 in the seventeenth low-voltage AC circuit breaker is Figure 1 Z17 in the eighteenth low-voltage AC circuit breaker is Figure 1 Z18 in the nineteenth low-voltage AC circuit breaker is Figure 1 Z19 in the twentieth low-voltage DC circuit breaker is Figure 1 Z20 in the twenty-first low-voltage DC circuit breaker is Figure 1 Z21 in the twenty-second low-voltage DC circuit breaker is Figure 1 Z22 in the twenty-third low-voltage AC circuit breaker is Figure 1 Z23 in the twenty-fourth low-voltage AC circuit breaker is Figure 1 Z24 in the twenty-fifth low-voltage AC circuit breaker is Figure 1 Z25 in the twenty-sixth low-voltage AC circuit breaker is Figure 1 Z26.

[0056] Referring to ​ The application provides an offshore converter station emergency lighting power supply system, comprising a DC power supply module, an AC power supply module, a photovoltaic energy storage module, an emergency lighting power distribution module, an emergency evacuation lighting module and an obstacle lighting module.

[0057] The output ends of the AC power supply module are connected with the input ends of the DC power supply module and the emergency lighting power distribution module respectively, the output end of the DC power supply module is connected with the input end of the emergency lighting power distribution module, the output end of the emergency lighting power distribution module is connected with the input ends of the emergency evacuation lighting module and the obstacle lighting module respectively, and the output end of the photovoltaic energy storage module is connected with the input end of the obstacle lighting module.

[0058] The AC power supply module is used to generate 380V AC power to supply AC load devices (AC load devices are some specific AC power devices in the field, which are not limited here) and transmit 380V AC power to the DC power supply module and the emergency lighting distribution module;

[0059] The DC power supply module is used to rectify the 380V AC power transmitted by the AC power supply module into 220V DC power to supply DC load devices (DC load devices are some specific DC power devices in the field, which are not limited here), store the 220V DC power, and invert the 220V DC power into 220V AC power to transmit to the emergency lighting distribution module;

[0060] The photovoltaic energy storage module is used to generate 110V DC power, store the 110V DC power, and invert the 110V DC power into 110V AC power to transmit to the obstacle lighting module;

[0061] The emergency lighting distribution module is used to switch the output of 380V AC power transmitted by the AC power supply module and 220V AC power transmitted by the DC power supply module.

[0062] In normal operation, the AC power supply module is powered by the low-voltage side of the station transformer. When the low-voltage side of the station transformer loses power, the first power switching device switches to the DC power supply module first. If the low-voltage side of the station transformer restores power within one hour, it switches back to the AC power supply module from the DC power supply module. Otherwise, the diesel generator is started to supply power to the AC power supply module. When the diesel generator is successfully started, the first power switching device switches back to the AC power supply module. The purpose of this is to avoid the start-stop frequency of the diesel generator when the low-voltage side of the station transformer loses power for a short time.

[0063] When the diesel generator runs out of oil, the AC power supply module loses power again, and the first power switching device switches back to the DC power supply module. When the lead-acid battery of the DC power supply module runs out of power, the 220V emergency lighting bus of the emergency lighting distribution module loses power. The emergency evacuation lighting module continues to be powered by its own battery. The second power switching device of the obstacle lighting module switches to the photovoltaic energy storage module for power supply.

[0064] As a preferred embodiment, the AC power supply module includes a 380V low-voltage distribution panel;

[0065] The 380V low-voltage distribution panel is internally provided with a 380V AC bus, which is connected to the diesel generator through a first low-voltage AC circuit breaker, connected to the low-voltage side of the station transformer through a second low-voltage AC circuit breaker, and connected to the AC load device through a third low-voltage AC circuit breaker;

[0066] The 380V AC bus is connected with the input end of the DC power supply module through the fourth low-voltage AC circuit breaker;

[0067] The 380V AC bus is connected with the input end of the emergency lighting power distribution module through the fifth low-voltage AC circuit breaker.

[0068] In normal operation, the first low-voltage AC circuit breaker is opened, the diesel generator is not working, and the second low-voltage AC circuit breaker is closed, so that the system is powered by the station transformer; when the station transformer fails to supply power, the second low-voltage AC circuit breaker is opened, the first low-voltage AC circuit breaker is closed, and the diesel generator starts to work, so that the system is powered by the diesel generator; the current is transmitted to the 380V AC bus, and then transmitted to the main power input end of the first power switching device through the fourth low-voltage AC circuit breaker and to the DC end of the first rectifier module through the fifth low-voltage AC circuit breaker.

[0069] To meet the requirement that the emergency lighting power supply duration of the offshore converter station should not be less than 18h, the oil tank of the diesel generator in the embodiment satisfies the oil quantity for continuous work of more than 18h.

[0070] As a preferred embodiment, the DC power supply module comprises a DC power distribution panel, a first rectifier module, a lead-acid storage battery and a first inverter module.

[0071] The DC power distribution panel is internally provided with a 220V DC bus.

[0072] The fourth low-voltage AC circuit breaker is connected with the AC end of the first rectifier module through the sixth low-voltage AC circuit breaker, and the DC end of the first rectifier module is connected with the 220V DC bus through the seventh low-voltage DC circuit breaker.

[0073] The 220V DC bus is connected with the lead-acid storage battery through the eighth low-voltage DC circuit breaker, and connected with the DC load device through the ninth low-voltage DC circuit breaker.

[0074] The 220V DC bus is connected with the DC end of the first inverter module through the tenth low-voltage DC circuit breaker, and the AC end of the first inverter module is connected with the input end of the emergency lighting power distribution module through the eleventh low-voltage AC circuit breaker.

[0075] In normal operation, the first rectifier module obtains AC power from the 380V AC bus and rectifies it into 220V DC power to float charge the lead-acid storage battery, at the same time, supplies power to the 220V DC bus, the 220V DC bus supplies power to the DC load device for power supply, and the DC power of the 220V DC bus is converted into AC power by the first inverter module and transmitted to the standby power input end of the first power switching device through the eleventh low-voltage AC circuit breaker.

[0076] As a preferred embodiment, the photovoltaic energy storage module comprises a photovoltaic cell, a first lithium iron phosphate battery, and a second inverter module;

[0077] The output end of the photovoltaic cell is connected with the 110V DC bus through the twelfth low-voltage DC circuit breaker, and the first lithium iron phosphate battery is connected with the 110V DC bus through the thirteenth low-voltage DC circuit breaker;

[0078] The DC end of the second inverter module is connected with the 110V DC bus through the fourteenth low-voltage DC circuit breaker, and the AC end of the second inverter module is connected with the input end of the obstacle lighting module through the fifteenth low-voltage AC circuit breaker.

[0079] When the second power switching device is powered by the main power input end, the photovoltaic cell only supplements the power of the lithium iron phosphate battery to make up for the loss of self-discharge; when the second power switching device is switched to the standby power input end, the photovoltaic cell and the lithium iron phosphate battery are simultaneously put into operation and discharge, and then the second inverter module converts the DC power into AC power, which is then transmitted to the standby power input end of the second power switching device.

[0080] As a preferred embodiment, the emergency lighting power distribution module comprises a first power switching device;

[0081] The main power input end of the first power switching device is connected with the 380V AC bus through the fifth low-voltage AC circuit breaker, and the standby power input end of the first power switching device is connected with the AC end of the first inverter module through the eleventh low-voltage AC circuit breaker;

[0082] The output end of the first power switching device (automatic transfer switch) is connected with the 220V emergency lighting bus, the 220V emergency lighting bus is connected with the input end of the emergency evacuation lighting module through the sixteenth low-voltage AC circuit breaker, the 220V emergency lighting bus is connected with the 220V emergency standby lighting load (the 220V emergency standby lighting load is some specific 220V emergency standby lighting electrical equipment in the field, which is not limited here) through the seventeenth low-voltage AC circuit breaker, and the 220V emergency lighting bus is connected with the input end of the obstacle lighting module through the eighteenth low-voltage AC circuit breaker.

[0083] In normal operation, the first power switching device takes power from the AC power supply module (from the AC power supply module); when the AC power supply module fails, the first power switching device switches to the standby power input end to take power (from the DC power supply module); the power switching time of the first power switching device and the second power switching device is within 400ms, and short-term parallel operation during power switching is supported to meet the requirement of uninterrupted power switching.

[0084] As a preferred embodiment, the emergency evacuation lighting module comprises a second lithium iron phosphate battery and a second rectifier module;

[0085] The sixteenth low-voltage AC circuit breaker is connected with the AC end of the second rectifier module through the nineteenth low-voltage AC circuit breaker, and the DC end of the second rectifier module is connected with the 36V emergency lighting bus through the twentieth low-voltage DC circuit breaker;

[0086] The 36V emergency lighting bus is connected with the second lithium iron phosphate battery through the twenty-first low-voltage DC circuit breaker, and the 36V emergency lighting bus is connected with the emergency evacuation lighting load (the emergency evacuation lighting load is not limited to some specific emergency evacuation lighting load electrical equipment in the field) through the twenty-second low-voltage DC circuit breaker.

[0087] As a preferred embodiment, the obstacle lighting module comprises a second power switching device (automatic transfer switch);

[0088] The main power input end of the second power switching device is connected with the 220V emergency lighting bus through the eighteenth low-voltage AC circuit breaker, and the standby power input end of the second power switching device is connected with the AC end of the second inverter module through the fifteenth low-voltage AC circuit breaker;

[0089] The output end of the second power switching device is connected with the 220V obstacle lighting bus, the 220V obstacle lighting bus is connected with the obstruction light through the twenty-third low-voltage AC circuit breaker, the 220V obstacle lighting bus is connected with the navigation light through the twenty-fourth low-voltage AC circuit breaker, the 220V obstacle lighting bus is connected with the signal light through the twenty-fifth low-voltage AC circuit breaker, and the 220V obstacle lighting bus is connected with the acoustic signal (the acoustic signal refers to a device installed on a ship and capable of emitting a specified whistle) through the twenty-sixth low-voltage AC circuit breaker.

[0090] In normal operation, the second power switching device takes power from the main power input end (from the emergency lighting power distribution module); when the AC power supply module fails, the second power switching device switches to take power from the standby power input end (from the photovoltaic energy storage module).

[0091] Embodiment two:

[0092] The application also provides an offshore converter station emergency lighting power supply method, comprising the following steps:

[0093] An AC power supply module is constructed, which is used to generate 380V AC power to supply power to AC load equipment and transmit 380V AC power to a DC power supply module and an emergency lighting power distribution module;

[0094] The direct current power supply module is used for rectifying 380V alternating current transmitted by the alternating current power supply module into 220V direct current to supply power to a direct current load device, storing the 220V direct current and inverting the 220V direct current into 220V alternating current to transmit to the emergency lighting power distribution module.

[0095] The photovoltaic energy storage module is used for generating 110V direct current, storing the 110V direct current and inverting the 110V direct current into 110V alternating current to transmit to the obstacle lighting module.

[0096] The emergency lighting power distribution module is used for switching 380V alternating current transmitted by the alternating current power supply module and 220V alternating current transmitted by the direct current power supply module.

[0097] The emergency evacuation lighting module is used for emergency evacuation lighting, and the obstacle lighting module is used for obstacle lighting.

[0098] The output end of the alternating current power supply module is connected with the input end of the direct current power supply module and the input end of the emergency lighting power distribution module respectively, the output end of the direct current power supply module is connected with the input end of the emergency lighting power distribution module, the output end of the emergency lighting power distribution module is connected with the input end of the emergency evacuation lighting module and the input end of the obstacle lighting module respectively, and the output end of the photovoltaic energy storage module is connected with the input end of the obstacle lighting module.

[0099] The method is used for implementing the system in Embodiment One, and details are not repeated here.

[0100] In the embodiments of the present application, "at least one" means one or more, and "multiple" means two or more. The "and / or" describes the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B, which can represent the cases of A alone, A and B together, and B alone. Wherein A and B can be singular or plural. The character " / " generally represents an "or" relationship between the front and rear associated objects. "At least one of the following" and the like means any combination of these items, including any combination of single or multiple items. For example, at least one of a, b and c can represent: a, b, c, a and b, a and c, b and c, or a and b and c, wherein a, b, and c can be single or multiple.

[0101] Those skilled in the art can clearly understand that the units and algorithm steps described in the embodiments disclosed herein can be realized by electronic hardware, computer software and a combination of electronic hardware and computer software. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solutions. Those skilled in the art can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0102] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be described here.

[0103] In several embodiments provided in the present application, any function realized in the form of a software function unit and sold or used as an independent product can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the parts of the technical solutions that make contributions to the prior art or the parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0104] The above is only the embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the present application.

Claims

1. An emergency lighting power supply system for an offshore converter station, characterized in that, It includes DC power supply modules, AC power supply modules, photovoltaic energy storage modules, emergency lighting distribution modules, emergency evacuation lighting modules, and obstacle lighting modules; The output terminal of the AC power supply module is connected to the input terminal of the DC power supply module and the input terminal of the emergency lighting distribution module, respectively. The output terminal of the DC power supply module is connected to the input terminal of the emergency lighting distribution module. The output terminal of the emergency lighting distribution module is connected to the input terminal of the emergency evacuation lighting module and the input terminal of the obstacle lighting module, respectively. The output terminal of the photovoltaic energy storage module is connected to the input terminal of the obstacle lighting module. The AC power supply module is used to generate 380V AC power to power AC load equipment, and to transmit 380V AC power to the DC power supply module and the emergency lighting power distribution module. The DC power supply module is used to rectify the 380V AC power transmitted by the AC power supply module into 220V DC power to power DC load equipment, and to store the 220V DC power and invert it into 220V AC power to transmit to the emergency lighting power distribution module. The photovoltaic energy storage module is used to generate 110V DC power, store the 110V DC power, and invert it into 110V AC power for transmission to the obstacle lighting module. The emergency lighting power distribution module is used to switch between the 380V AC power transmitted by the AC power supply module and the 220V AC power transmitted by the DC power supply module. The AC power supply module includes a 380V low-voltage power distribution cabinet; The 380V low-voltage distribution cabinet is equipped with a 380V AC bus. The 380V AC bus is connected to the diesel generator through the first low-voltage AC circuit breaker, the 380V AC bus is connected to the low-voltage side of the station transformer through the second low-voltage AC circuit breaker, and the 380V AC bus is connected to the AC load equipment through the third low-voltage AC circuit breaker. The 380V AC bus is connected to the input terminal of the DC power supply module through the fourth low-voltage AC circuit breaker; The 380V AC busbar is connected to the input terminal of the emergency lighting power distribution module through the fifth low-voltage AC circuit breaker; The DC power supply module includes a DC power distribution panel, a first rectifier module, a lead-acid battery, and a first inverter module; The DC power distribution panel is equipped with a 220V DC bus. The fourth low-voltage AC circuit breaker is connected to the AC terminal of the first rectifier module through the sixth low-voltage AC circuit breaker, and the DC terminal of the first rectifier module is connected to the 220V DC bus through the seventh low-voltage DC circuit breaker. The 220V DC bus is connected to the lead-acid battery through the eighth low-voltage DC circuit breaker, and the 220V DC bus is connected to the DC load equipment through the ninth low-voltage DC circuit breaker. The 220V DC bus is connected to the DC terminal of the first inverter module through the tenth low-voltage DC circuit breaker, and the AC terminal of the first inverter module is connected to the input terminal of the emergency lighting distribution module through the eleventh low-voltage AC circuit breaker.

2. The emergency lighting power supply system for offshore converter stations according to claim 1, characterized in that, The photovoltaic energy storage module includes a photovoltaic cell, a first lithium iron phosphate battery, and a second inverter module. The output terminal of the photovoltaic cell is connected to the 110V DC bus through the twelfth low-voltage DC circuit breaker, and the first lithium iron phosphate battery is connected to the 110V DC bus through the thirteenth low-voltage DC circuit breaker. The DC terminal of the second inverter module is connected to the 110V DC bus via the fourteenth low-voltage DC circuit breaker, and the AC terminal of the second inverter module is connected to the input terminal of the obstacle lighting module via the fifteenth low-voltage AC circuit breaker.

3. The emergency lighting power supply system for offshore converter stations according to claim 1, characterized in that, The emergency lighting power distribution module includes a first power switching device; The main power input terminal of the first power switching device is connected to the 380V AC bus through the fifth low-voltage AC circuit breaker, and the backup power input terminal of the first power switching device is connected to the AC terminal of the first inverter module through the eleventh low-voltage AC circuit breaker. The output of the first power switching device is connected to the 220V emergency lighting bus. The 220V emergency lighting bus is connected to the input of the emergency evacuation lighting module through the sixteenth low-voltage AC circuit breaker. The 220V emergency lighting bus is connected to the 220V emergency backup lighting load through the seventeenth low-voltage AC circuit breaker. The 220V emergency lighting bus is connected to the input of the obstacle lighting module through the eighteenth low-voltage AC circuit breaker.

4. The emergency lighting power supply system for offshore converter stations according to claim 3, characterized in that, The emergency evacuation lighting module includes a second lithium iron phosphate battery and a second rectifier module. The sixteenth low-voltage AC circuit breaker is connected to the AC terminal of the second rectifier module through the nineteenth low-voltage AC circuit breaker, and the DC terminal of the second rectifier module is connected to the 36V emergency lighting bus through the twentieth low-voltage DC circuit breaker. The 36V emergency lighting bus is connected to the second lithium iron phosphate battery through the 21st low-voltage DC circuit breaker, and the 36V emergency lighting bus is connected to the emergency evacuation lighting load through the 22nd low-voltage DC circuit breaker.

5. The emergency lighting power supply system for offshore converter stations according to claim 4, characterized in that, The obstacle lighting module includes a second power switching device; The main power input terminal of the second power switching device is connected to the 220V emergency lighting bus via the eighteenth low-voltage AC circuit breaker, and the backup power input terminal of the second power switching device is connected to the AC terminal of the second inverter module via the fifteenth low-voltage AC circuit breaker. The output terminal of the second power switching device is connected to the 220V obstacle lighting bus. The 220V obstacle lighting bus is connected to the obstacle light through the 23rd low-voltage AC circuit breaker, the 220V obstacle lighting bus is connected to the navigation light through the 24th low-voltage AC circuit breaker, the 220V obstacle lighting bus is connected to the signal light through the 25th low-voltage AC circuit breaker, and the 220V obstacle lighting bus is connected to the audible signal through the 26th low-voltage AC circuit breaker.

6. A method for supplying emergency lighting power to an offshore converter station, characterized in that, Includes the following steps: An AC power supply module is constructed, which generates 380V AC power to supply power to AC load equipment and transmits the 380V AC power to the DC power supply module and the emergency lighting power distribution module. A DC power supply module is constructed, which is used to rectify the 380V AC power transmitted by the AC power supply module into 220V DC power to power DC load equipment, and to store the 220V DC power and invert it into 220V AC power to transmit to the emergency lighting power distribution module. A photovoltaic energy storage module is constructed, which is used to generate 110V DC power, store the 110V DC power, and invert it into 110V AC power for transmission to the obstacle lighting module; An emergency lighting power distribution module is constructed, which is used to switch between 380V AC power transmitted by the output AC power supply module and 220V AC power transmitted by the DC power supply module. Construct an emergency evacuation lighting module and an obstacle lighting module, wherein the emergency evacuation lighting module is used for emergency evacuation lighting and the obstacle lighting module is used for obstacle lighting; The output terminal of the AC power supply module is connected to the input terminal of the DC power supply module and the input terminal of the emergency lighting distribution module, respectively. The output terminal of the DC power supply module is connected to the input terminal of the emergency lighting distribution module. The output terminal of the emergency lighting distribution module is connected to the input terminal of the emergency evacuation lighting module and the input terminal of the obstacle lighting module, respectively. The output terminal of the photovoltaic energy storage module is connected to the input terminal of the obstacle lighting module. The AC power supply module includes a 380V low-voltage power distribution cabinet; The 380V low-voltage distribution cabinet is equipped with a 380V AC bus. The 380V AC bus is connected to the diesel generator through the first low-voltage AC circuit breaker, the 380V AC bus is connected to the low-voltage side of the station transformer through the second low-voltage AC circuit breaker, and the 380V AC bus is connected to the AC load equipment through the third low-voltage AC circuit breaker. The 380V AC bus is connected to the input terminal of the DC power supply module through the fourth low-voltage AC circuit breaker; The 380V AC busbar is connected to the input terminal of the emergency lighting power distribution module through the fifth low-voltage AC circuit breaker; The DC power supply module includes a DC power distribution panel, a first rectifier module, a lead-acid battery, and a first inverter module; The DC power distribution panel is equipped with a 220V DC bus. The fourth low-voltage AC circuit breaker is connected to the AC terminal of the first rectifier module through the sixth low-voltage AC circuit breaker, and the DC terminal of the first rectifier module is connected to the 220V DC bus through the seventh low-voltage DC circuit breaker. The 220V DC bus is connected to the lead-acid battery through the eighth low-voltage DC circuit breaker, and the 220V DC bus is connected to the DC load equipment through the ninth low-voltage DC circuit breaker. The 220V DC bus is connected to the DC terminal of the first inverter module through the tenth low-voltage DC circuit breaker, and the AC terminal of the first inverter module is connected to the input terminal of the emergency lighting distribution module through the eleventh low-voltage AC circuit breaker.

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