Offshore converter station emergency lighting power supply system and method

Abstract

The invention relates to an emergency lighting power supply system and method for an offshore converter station. The system 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 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 power distribution module. And the direct current power supply module is responsible for converting 380V alternating current into 220V direct current, supplying the 220V direct current to direct current load equipment, and storing electric energy or inverting the 220V direct current into 220V alternating current to be used by the emergency lighting power distribution module. The photovoltaic energy storage module generates 110V direct current, also has energy storage and inversion functions, and converts the 110V direct current into 110V alternating current to be supplied to the obstacle lighting module. The emergency lighting power distribution module can switch 380V alternating current output of the alternating current power supply module and 220V alternating current output of the direct current power supply module, so that the power supply stability is ensured. According to the invention, various energy forms are fully utilized, and the flexibility and reliability of the system are improved.

Description

Technical Field

[0001] The invention relates to an emergency lighting power supply system and method for an offshore converter station, belonging to the technical field of flexible direct current transmission. Background Art

[0002] Emergency lighting is divided into emergency evacuation lighting and emergency backup lighting. Emergency evacuation lighting provides instructions and lighting for personnel to identify and use evacuation passages when dangerous situations such as fire occur. Emergency backup lighting is used to ensure that fire control rooms and other places need to provide continued working lighting to ensure smooth operation after dangerous situations such as fire occur. The continuous power supply time for emergency evacuation lighting in onshore flexible DC converter stations should not be less than 0.5h, and the continuous power supply time for continued working emergency lighting should not be less than 3h. Different from the requirements for emergency lighting power supply for onshore flexible DC converter stations, the "Design Specifications for Offshore Converter Stations for Wind Farm Projects" implemented in November 2024 requires that the emergency lighting power supply duration for offshore converter stations should not be less than 18h.

[0003] The offshore flexible DC converter station is an offshore facility. According to the "Design Specifications for Offshore Converter Stations for Wind Farm Projects", the International Maritime Collision Regulations require that the navigation lights, signal lights, and sound signals of offshore converter stations should be powered for at least 4 days in emergency conditions. The signal lights, obstacle lights, and sound signals that mark the outer contours of buildings should be powered for at least 4 days in emergency conditions. It can be seen that the emergency lighting power supply of offshore flexible DC converter stations has been greatly expanded in terms of duration and coverage compared to onshore converter stations, and the newly added obstacle lighting and sound signal loads counted on a daily basis have brought new challenges.

[0004] The patent document with the patent number "CN119010319A" discloses a power supply control device and a power supply control method for an energy storage system. The problem with this device is that it mainly relies on auxiliary AC power supply modules and UPS AC power supply modules. Although the stability of the power supply is ensured, the energy utilization is relatively single and lacks sustainability and diversity. Although a stable power supply control solution is provided, there may be certain limitations in emergency response. For example, in an emergency, if the main power supply fails, it may take a long time to switch to the backup power supply. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present invention proposes an emergency lighting power supply system and method for an offshore converter station.

[0006] The technical solution of the present invention is as follows:

[0007] On the one hand, the present invention provides an offshore converter station emergency lighting power supply system, including 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;

[0008] The output end of the AC power supply module is respectively connected to the input end of the DC power supply module and the input end of the emergency lighting distribution module, the output end of the DC power supply module is connected to the input end of the emergency lighting distribution module, the output end of the emergency lighting distribution module is respectively connected to the input end of the emergency evacuation lighting module and the input end of the obstacle lighting module, and the output end of the photovoltaic energy storage module is connected to the input end of the obstacle lighting module;

[0009] The AC power supply module is used to generate 380V AC power to power the AC load equipment, and transmit the 380V AC power to the DC power supply module and the emergency lighting distribution module;

[0010] 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 the DC load equipment, and store and invert the 220V DC power into 220V AC power for transmission to the emergency lighting distribution module;

[0011] 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;

[0012] The emergency lighting power distribution module is used to switch the 380V AC power transmitted by the output AC power supply module and the 220V AC power transmitted by the DC power supply module.

[0013] As a preferred embodiment, the AC power supply module includes a 380V low-voltage distribution panel cabinet;

[0014] A 380V AC bus is provided inside the 380V low-voltage power distribution cabinet, the 380V AC bus is connected to the diesel generator through a first low-voltage AC circuit breaker, the 380V AC bus is connected to the low-voltage side of the station transformer through a second low-voltage AC circuit breaker, and the 380V AC bus is connected to the AC load equipment through a third low-voltage AC circuit breaker;

[0015] The 380V AC bus is connected to the input end of the DC power supply module through a fourth low-voltage AC circuit breaker;

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

[0017] As a preferred implementation, the DC power supply module includes a DC distribution panel, a first rectifier module, a lead-acid battery, and a first inverter module;

[0018] A 220V DC bus is provided inside the DC distribution panel;

[0019] The fourth low-voltage AC circuit breaker is connected to 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 to the 220V DC bus through the seventh low-voltage DC circuit breaker;

[0020] The 220V DC bus is connected to the lead-acid battery through an eighth low-voltage DC circuit breaker, and the 220V DC bus is connected to the DC load device through a ninth low-voltage DC circuit breaker;

[0021] The 220V DC bus is connected to 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 to the input end of the emergency lighting distribution module through the eleventh low-voltage AC circuit breaker.

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

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

[0024] The DC end of the second inverter module is connected to the 110V DC bus through the fourteenth low-voltage DC circuit breaker, and the AC end of the second inverter module is connected to the input end of the obstacle lighting module through the fifteenth low-voltage AC circuit breaker.

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

[0026] The main power input end of the first power switching device is connected to the 380V AC bus through a fifth low-voltage AC circuit breaker, and the backup power input end of the first power switching device is connected to the AC end of the first inverter module through an eleventh low-voltage AC circuit breaker;

[0027] The output end of the first power switching device is connected to the 220V emergency lighting bus, the 220V emergency lighting bus is connected to the input end 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 standby lighting load through the seventeenth low-voltage AC circuit breaker, and the 220V emergency lighting bus is connected to the input end of the obstacle lighting module through the eighteenth low-voltage AC circuit breaker.

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

[0029] The sixteenth low-voltage AC circuit breaker is connected to 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 to the 36V emergency lighting bus through the twentieth low-voltage DC circuit breaker;

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

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

[0032] The main power input terminal of the second power switching device is connected to the 220V emergency lighting busbar through 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 through the fifteenth low-voltage AC circuit breaker;

[0033] The output end 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 twenty-third low-voltage AC circuit breaker, the 220V obstacle lighting bus is connected to the navigation light through the twenty-fourth low-voltage AC circuit breaker, the 220V obstacle lighting bus is connected to the signal light through the twenty-fifth low-voltage AC circuit breaker, and the 220V obstacle lighting bus is connected to the sound signal through the twenty-sixth low-voltage AC circuit breaker.

[0034] In another aspect, the present invention further provides a method for powering emergency lighting at an offshore converter station, comprising the following steps:

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

[0036] Construct a DC power supply module, which is used to rectify the 380V AC power transmitted by the AC power supply module into 220V DC power to power the DC load equipment, and store and invert the 220V DC power into 220V AC power for transmission to the emergency lighting distribution module;

[0037] Constructing a photovoltaic energy storage module, wherein the photovoltaic energy storage module is used to generate 110V direct current, store the 110V direct current, and invert it into 110V alternating current for transmission to the obstacle lighting module;

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

[0039] Constructing 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;

[0040] The output end of the AC power supply module is respectively connected to the input end of the DC power supply module and the input end of the emergency lighting distribution module, the output end of the DC power supply module is connected to the input end of the emergency lighting distribution module, the output end of the emergency lighting distribution module is respectively connected to the input end of the emergency evacuation lighting module and the input end of the obstacle lighting module, and the output end of the photovoltaic energy storage module is connected to the input end of the obstacle lighting module.

[0041] The present invention has the following beneficial effects:

[0042] 1. By combining multiple energy forms such as AC power supply modules, DC power supply modules, and photovoltaic energy storage modules, the present invention enables the system to quickly switch to a backup power supply when a main power supply fails, thereby ensuring continuous power supply for emergency lighting and obstacle lighting. The system design allows switching between different power modules to adapt to different emergency situations and power supply requirements, thereby improving the adaptability and flexibility of the system. In emergency situations such as fires, emergency evacuation lighting and emergency backup lighting can provide personnel with necessary lighting and instructions to ensure the safe evacuation of personnel, while ensuring that lighting in key operating areas such as fire control rooms is not interrupted. When the main power supply fails, the emergency lighting distribution module can quickly switch to the backup power supply to ensure continuous power supply to the emergency lighting system. This rapid response capability is crucial for critical facilities such as offshore converter stations, which can provide necessary lighting for personnel evacuation and firefighting operations in emergency situations, thereby ensuring personnel safety.

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

[0044] 3. The power switching time of the first power switching device and the second power switching device of the present invention is within 400ms, and they are allowed to run in parallel for a short time during the switching period, meeting the requirements of non-stop switching and ensuring the continuity of power supply.

[0045] 4. The diesel generator, large-capacity battery pack (valve-regulated lead-acid battery, lithium iron phosphate battery) and photovoltaic energy storage of the present invention work together to meet the power supply duration standards of 18 hours for emergency lighting at offshore converter stations and 4 days for obstacle lighting. The power supply duration of the lithium iron phosphate battery of the emergency evacuation lighting system is not less than 1 hour; the power supply duration 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 battery and lithium iron phosphate battery can work together to power the obstacle lighting system for up to several months.

[0046] 5. The system of the present invention 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 contours of buildings, and obstacle lights. Compared with land-based converter stations, the power supply time and coverage are greatly expanded.

[0047] 6. The present invention has developed a detailed and intelligent power switching logic. For example, when the AC power supply module fails and loses power, the first power switching device first switches to the DC power supply module. If the power supply on the low-voltage side of the station transformer is restored within 1 hour, it is switched back; otherwise, the diesel generator is started. This can avoid frequent starting and stopping of the diesel generator when the low-voltage side of the station transformer loses power temporarily, optimize system operation, and increase equipment life. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 This is the wiring diagram of the system of the present invention. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] It should be understood that the step numbers used in this document are only for convenience of description and are not intended to limit the order in which the steps are executed.

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

[0052] The terms “include” and “comprising” 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 combinations thereof.

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

[0054] Embodiment 1:

[0055] In this embodiment, the first low voltage AC circuit breaker is Figure 1 The second low voltage AC circuit breaker is Z1 in Figure 1 Z2 in the third low voltage AC circuit breaker is Figure 1 The fourth low voltage AC circuit breaker is Z3 in Figure 1 The fifth low voltage AC circuit breaker is Z4. Figure 1 Z5, the sixth low voltage AC circuit breaker is Figure 1 The seventh low voltage DC circuit breaker is Z6. Figure 1 The eighth low voltage DC circuit breaker is Z7 Figure 1 The ninth low voltage DC circuit breaker is Z8 Figure 1 Z9, the tenth low voltage DC circuit breaker is Figure 1 The eleventh low voltage AC circuit breaker is Z10 Figure 1 The twelfth low voltage DC circuit breaker is Z11 Figure 1 The Z12, thirteenth low voltage DC circuit breaker is Figure 1 The Z13, the fourteenth low voltage DC circuit breaker is Figure 1 The Z14, the fifteenth low voltage AC circuit breaker is Figure 1 The Z15, sixteenth low voltage AC circuit breaker is Figure 1 The Z16, seventeenth low voltage AC circuit breaker is Figure 1 The Z17, the eighteenth low voltage AC circuit breaker is Figure 1 The Z18, the nineteenth low voltage AC circuit breaker is Figure 1 The Z19, 20th low voltage DC circuit breaker is Figure 1 The Z20, twenty-first low voltage DC circuit breaker is Figure 1 The Z21, the twenty-second low voltage DC circuit breaker is Figure 1 The Z22, twenty-third low voltage AC circuit breaker is Figure 1 The Z23, twenty-fourth low voltage AC circuit breaker is Figure 1 The Z24, twenty-fifth low voltage AC circuit breaker is Figure 1 The Z25, twenty-sixth low voltage AC circuit breaker is Figure 1 The Z26 in the.

[0056] See also Figure 1 , the present invention provides an emergency lighting power supply system for an offshore converter station, including 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 end of the AC power supply module is respectively connected to the input end of the DC power supply module and the input end of the emergency lighting distribution module, the output end of the DC power supply module is connected to the input end of the emergency lighting distribution module, the output end of the emergency lighting distribution module is respectively connected to the input end of the emergency evacuation lighting module and the input end of the obstacle lighting module, and the output end of the photovoltaic energy storage module is connected to the input end of the obstacle lighting module;

[0058] The AC power supply module is used to generate 380V AC power to power AC load equipment (AC load equipment is some specific AC power equipment on site and is not limited here), and transmit the 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 power to the DC load equipment (the DC load equipment is some specific DC power equipment on site, which is not limited here), and store the 220V DC power and invert it 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 it into 110V AC power for transmission to the obstacle lighting module;

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

[0062] During 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 encounters a fault and loses power, the first power switching device first switches to the DC power supply module for power supply. If the low-voltage side of the station transformer resumes power supply within 1 hour, switch back from the DC power supply module to the AC power supply module. Otherwise, start the diesel generator to power 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 number of starts and stops of the diesel generator when the low-voltage side of the station transformer loses power temporarily.

[0063] When the diesel generator runs out of fuel, 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 busbar 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 cabinet;

[0065] A 380V AC bus is provided inside the 380V low-voltage power distribution cabinet, the 380V AC bus is connected to the diesel generator through a first low-voltage AC circuit breaker, the 380V AC bus is connected to the low-voltage side of the station transformer through a second low-voltage AC circuit breaker, and the 380V AC bus is connected to the AC load equipment through a third low-voltage AC circuit breaker;

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

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

[0068] During normal operation, the first low-voltage AC circuit breaker is opened, the diesel generator does not work, the second low-voltage AC circuit breaker is closed, and the system is powered by the station transformer; when the station transformer fails and cannot supply power, the second low-voltage AC circuit breaker is opened, the first low-voltage AC circuit breaker is closed, the diesel generator starts working, and 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 transmitted to the DC end of the first rectifier module through the fifth low-voltage AC circuit breaker;

[0069] In order to meet the requirement that the emergency lighting power supply duration of the offshore converter station should not be less than 18 hours, the fuel tank of the diesel generator in this embodiment is sufficient to have a fuel capacity sufficient to continuously work for more than 18 hours.

[0070] As a preferred implementation, the DC power supply module includes a DC distribution panel, a first rectifier module, a lead-acid battery, and a first inverter module;

[0071] A 220V DC bus is provided inside the DC distribution panel;

[0072] The fourth low-voltage AC circuit breaker is connected to 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 to the 220V DC bus through the seventh low-voltage DC circuit breaker;

[0073] The 220V DC bus is connected to the lead-acid battery through an eighth low-voltage DC circuit breaker, and the 220V DC bus is connected to the DC load device through a ninth low-voltage DC circuit breaker;

[0074] The 220V DC bus is connected to 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 to the input end of the emergency lighting distribution module through the eleventh low-voltage AC circuit breaker.

[0075] During 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 battery, and at the same time supplies power to the 220V DC bus. The 220V DC bus supplies power to the DC load equipment, and converts the DC power of the 220V DC bus into AC power through the first inverter module and transmits it to the backup power input terminal of the first power switching device through the eleventh low-voltage AC circuit breaker.

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

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

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

[0079] When the second power switching device supplies power to the main power input terminal, the photovoltaic cell only replenishes the lithium iron phosphate battery to make up for the power loss caused by self-discharge; when the second power switching device switches to the backup power input terminal to draw power, the photovoltaic cell and the lithium iron phosphate battery are put into operation and discharge at the same time, and then the DC power is converted into AC power through the second inverter module, and then transmitted to the backup power input terminal of the second power switching device after conversion.

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

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

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

[0083] During normal operation, the first power switching device draws power from the main power input terminal (from the AC power supply module); when the AC power supply module fails, the first power switching device switches to the backup power input terminal (from the DC power supply module); the power switching time between the first power switching device and the second power switching device is within 400ms, and supports short-term parallel operation during power switching to meet the requirements of power switching without power outages.

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

[0085] The sixteenth low-voltage AC circuit breaker is connected to 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 to the 36V emergency lighting bus through the twentieth low-voltage DC circuit breaker;

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

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

[0088] The main power input terminal of the second power switching device is connected to the 220V emergency lighting busbar through 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 through the fifteenth low-voltage AC circuit breaker;

[0089] The output end 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 twenty-third low-voltage AC circuit breaker, the 220V obstacle lighting bus is connected to the navigation light through the twenty-fourth low-voltage AC circuit breaker, the 220V obstacle lighting bus is connected to the signal light through the twenty-fifth low-voltage AC circuit breaker, and the 220V obstacle lighting bus is connected to the sound signal (the sound signal refers to a device installed on the ship that can emit a specified whistle sound) through the twenty-sixth low-voltage AC circuit breaker.

[0090] During normal operation, the second power switching device draws power from the main power input terminal (from the emergency lighting distribution module); when the AC power supply module fails, the second power switching device switches to the backup power input terminal (from the photovoltaic energy storage module).

[0091] Embodiment 2:

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

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

[0094] Construct a DC power supply module, which is used to rectify the 380V AC power transmitted by the AC power supply module into 220V DC power to power the DC load equipment, and store and invert the 220V DC power into 220V AC power for transmission to the emergency lighting distribution module;

[0095] Constructing a photovoltaic energy storage module, wherein the photovoltaic energy storage module is used to generate 110V direct current, store the 110V direct current, and invert it into 110V alternating current for transmission to the obstacle lighting module;

[0096] Construct an emergency lighting power distribution module, which is used to switch the 380V AC power transmitted by the output AC power supply module and the 220V AC power transmitted by the DC power supply module;

[0097] Constructing 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;

[0098] The output end of the AC power supply module is respectively connected to the input end of the DC power supply module and the input end of the emergency lighting distribution module, the output end of the DC power supply module is connected to the input end of the emergency lighting distribution module, the output end of the emergency lighting distribution module is respectively connected to the input end of the emergency evacuation lighting module and the input end of the obstacle lighting module, and the output end of the photovoltaic energy storage module is connected to the input end of the obstacle lighting module.

[0099] This method is used to implement the system in Example 1 and will not be described in detail here.

[0100] In the embodiments of the present application, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. Among them, A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b and c can be represented by: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, c can be single or multiple.

[0101] Those of ordinary skill in the art will appreciate that the various units and algorithm steps described in the embodiments disclosed herein can be implemented in a combination of electronic hardware, computer software, and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0102] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0103] In several embodiments provided in the present application, if any function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory; hereinafter referred to as: ROM), random access memory (Random Access Memory; hereinafter referred to as: RAM), disk or optical disk, and other media that can store program codes.

[0104] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An emergency lighting power supply system for an offshore converter station, characterized in that: Including DC power supply module, AC power supply module, photovoltaic energy storage module, emergency lighting distribution module, emergency evacuation lighting module and obstacle lighting module; The output end of the AC power supply module is respectively connected to the input end of the DC power supply module and the input end of the emergency lighting distribution module, the output end of the DC power supply module is connected to the input end of the emergency lighting distribution module, the output end of the emergency lighting distribution module is respectively connected to the input end of the emergency evacuation lighting module and the input end of the obstacle lighting module, and the output end of the photovoltaic energy storage module is connected to the input end of the obstacle lighting module; The AC power supply module is used to generate 380V AC power to power the AC load equipment, and transmit the 380V AC power to the DC power supply module and the emergency lighting 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 the DC load equipment, and store and invert the 220V DC power into 220V AC power for transmission to the emergency lighting 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 the 380V AC power transmitted by the output AC power supply module and the 220V AC power transmitted by the DC power supply module.

2. The offshore converter station emergency lighting power supply system according to claim 1, characterized in that: The AC power supply module includes a 380V low-voltage distribution panel cabinet; A 380V AC bus is provided inside the 380V low-voltage power distribution cabinet, the 380V AC bus is connected to the diesel generator through a first low-voltage AC circuit breaker, the 380V AC bus is connected to the low-voltage side of the station transformer through a second low-voltage AC circuit breaker, and the 380V AC bus is connected to the AC load equipment through a third low-voltage AC circuit breaker; The 380V AC bus is connected to the input end of the DC power supply module through a fourth low-voltage AC circuit breaker; The 380V AC bus is connected to the input end of the emergency lighting power distribution module through a fifth low-voltage AC circuit breaker.

3. The offshore converter station emergency lighting power supply system according to claim 2, characterized in that: The DC power supply module includes a DC distribution panel, a first rectifier module, a lead-acid battery, and a first inverter module; A 220V DC bus is provided inside the DC distribution panel; The fourth low-voltage AC circuit breaker is connected to 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 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 an eighth low-voltage DC circuit breaker, and the 220V DC bus is connected to the DC load device through a ninth low-voltage DC circuit breaker; The 220V DC bus is connected to 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 to the input end of the emergency lighting distribution module through the eleventh low-voltage AC circuit breaker.

4. The offshore converter station emergency lighting power supply system 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 end of the photovoltaic cell is connected to the 110V DC bus through a twelfth low-voltage DC circuit breaker, and the first lithium iron phosphate battery is connected to the 110V DC bus through a thirteenth low-voltage DC circuit breaker; The DC end of the second inverter module is connected to the 110V DC bus through the fourteenth low-voltage DC circuit breaker, and the AC end of the second inverter module is connected to the input end of the obstacle lighting module through the fifteenth low-voltage AC circuit breaker.

5. The offshore converter station emergency lighting power supply system according to claim 2 or 3, characterized in that: The emergency lighting power distribution module comprises a first power switching device; The main power input end of the first power switching device is connected to the 380V AC bus through a fifth low-voltage AC circuit breaker, and the backup power input end of the first power switching device is connected to the AC end of the first inverter module through an eleventh low-voltage AC circuit breaker; The output end of the first power switching device is connected to the 220V emergency lighting bus, the 220V emergency lighting bus is connected to the input end 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 standby lighting load through the seventeenth low-voltage AC circuit breaker, and the 220V emergency lighting bus is connected to the input end of the obstacle lighting module through the eighteenth low-voltage AC circuit breaker.

6. The offshore converter station emergency lighting power supply system according to claim 5, 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 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 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 twenty-first low-voltage DC circuit breaker, and the 36V emergency lighting bus is connected to the emergency evacuation lighting load through the twenty-second low-voltage DC circuit breaker.

7. The offshore converter station emergency lighting power supply system according to claim 4 or 5, characterized in that: The obstruction 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 busbar through 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 through the fifteenth low-voltage AC circuit breaker; The output end 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 twenty-third low-voltage AC circuit breaker, the 220V obstacle lighting bus is connected to the navigation light through the twenty-fourth low-voltage AC circuit breaker, the 220V obstacle lighting bus is connected to the signal light through the twenty-fifth low-voltage AC circuit breaker, and the 220V obstacle lighting bus is connected to the sound signal through the twenty-sixth low-voltage AC circuit breaker.

8. A method for powering emergency lighting at an offshore converter station, characterized in that: The following steps are involved: Construct an AC power supply module, which is used to generate 380V AC power to power AC load equipment and transmit the 380V AC power to the DC power supply module and the emergency lighting distribution module; Construct a DC power supply module, which is used to rectify the 380V AC power transmitted by the AC power supply module into 220V DC power to power the DC load equipment, and store and invert the 220V DC power into 220V AC power for transmission to the emergency lighting distribution module; Constructing a photovoltaic energy storage module, wherein the photovoltaic energy storage module is used to generate 110V direct current, store the 110V direct current, and invert it into 110V alternating current for transmission to the obstacle lighting module; Construct an emergency lighting power distribution module, which is used to switch the 380V AC power transmitted by the output AC power supply module and the 220V AC power transmitted by the DC power supply module; Constructing 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 end of the AC power supply module is respectively connected to the input end of the DC power supply module and the input end of the emergency lighting distribution module, the output end of the DC power supply module is connected to the input end of the emergency lighting distribution module, the output end of the emergency lighting distribution module is respectively connected to the input end of the emergency evacuation lighting module and the input end of the obstacle lighting module, and the output end of the photovoltaic energy storage module is connected to the input end of the obstacle lighting module.

9. The offshore converter station emergency lighting power supply method according to claim 8, characterized in that: The AC power supply module includes a 380V low-voltage distribution panel cabinet; A 380V AC bus is provided inside the 380V low-voltage power distribution cabinet, the 380V AC bus is connected to the diesel generator through a first low-voltage AC circuit breaker, the 380V AC bus is connected to the low-voltage side of the station transformer through a second low-voltage AC circuit breaker, and the 380V AC bus is connected to the AC load equipment through a third low-voltage AC circuit breaker; The 380V AC bus is connected to the input end of the DC power supply module through a fourth low-voltage AC circuit breaker; The 380V AC bus is connected to the input end of the emergency lighting power distribution module through a fifth low-voltage AC circuit breaker.

10. The offshore converter station emergency lighting power supply method according to claim 9, characterized in that: The DC power supply module includes a DC distribution panel, a first rectifier module, a lead-acid battery, and a first inverter module; A 220V DC bus is provided inside the DC distribution panel; The fourth low-voltage AC circuit breaker is connected to 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 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 an eighth low-voltage DC circuit breaker, and the 220V DC bus is connected to the DC load device through a ninth low-voltage DC circuit breaker; The 220V DC bus is connected to 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 to the input end of the emergency lighting distribution module through the eleventh low-voltage AC circuit breaker.

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