Automatic black start system

Abstract

The utility model relates to an automatic black start system. The system comprises a first generator module; the first generator auxiliary module is connected to the first generator module; the second generator auxiliary module is connected to the first generator module; the second generator module is connected to the first generator module and the second generator auxiliary module; wherein the first generator auxiliary module outputs a first electric signal to the first generator module; after receiving the first electric signal, the first generator module generates a second electric signal in a black electricity state; the second generator auxiliary module generates a third electric signal after receiving the second electric signal; the second generator module generates a fourth electric signal after receiving the third electric signal. The first generator module with the self-starting capability is firstly automatically started, the second generator module without the self-starting capability is driven, the system recovery range is gradually expanded, the recovery of the whole power system is finally realized, and meanwhile, the power failure duration of the power system is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ocean engineering and power generation, in particular to an automatic black start system. BACKGROUND

[0002] With the increasing demand for natural gas worldwide, floating liquefied natural gas production storage and offloading (FLNG) will become an important way of natural gas production. FLNG facilities have the advantages of strong flexibility, strong adaptability, short construction period, etc., can quickly respond to market demand, and can continue production in severe sea conditions. In addition, FLNG facilities can also effectively reduce the cost of natural gas production and improve efficiency.

[0003] Most FLNGs use island-type power grids. With the development of new energy, independent power stations are used on FLNGs, and various power sources are used, such as single-cycle power generation by gas generator sets, combined-cycle power generation by gas generator sets and steam turbine generator sets, important diesel generator sets, emergency diesel generator sets, and diversified configuration of uninterruptible power supplies and independent power management systems.

[0004] After the traditional floating project power system is blacked out, manual troubleshooting is required, and power supply is restored manually in stages. CONTENT OF THE INVENTION

[0005] Therefore, it is necessary to provide an automatic black start system for the problem of manual power restoration.

[0006] An automatic black start system, the system comprising:

[0007] a first generator module;

[0008] a first generator auxiliary module connected to the first generator module;

[0009] a second generator auxiliary module connected to the first generator module;

[0010] a second generator module connected to the first generator module and the second generator auxiliary module;

[0011] wherein the first generator auxiliary module outputs a first electrical signal to the first generator module; the first generator module generates a second electrical signal in a black-out state after receiving the first electrical signal; the second generator auxiliary module generates a third electrical signal after receiving the second electrical signal; and the second generator module generates a fourth electrical signal after receiving the third electrical signal.

[0012] In one embodiment, the first generator auxiliary module is connected in series to the first generator module through a first power supply controller and a second power supply controller;

[0013] The first generator auxiliary module is further connected with the third generator module through a third power supply controller.

[0014] The first generator auxiliary module receives a fifth electric signal generated by the third generator module to output the first electric signal in the case of power failure.

[0015] In one embodiment, the first generator auxiliary module includes at least two groups of first generator auxiliary equipment; the first power supply controller includes a diesel engine auxiliary low-voltage distribution board; the second power supply controller includes a medium-voltage distribution board; the first generator module includes at least two diesel generators; and the first electric signal includes a diesel engine electric signal.

[0016] Each group of the first generator auxiliary equipment is connected with at least one diesel generator through the diesel engine auxiliary low-voltage distribution board and the medium-voltage distribution board.

[0017] The medium-voltage distribution board and the diesel engine auxiliary low-voltage distribution board are connected through a first transformer; and the first generator auxiliary equipment outputs the diesel engine electric signal to the diesel generator.

[0018] In one embodiment, the third power supply controller includes an emergency distribution board; and the third generator module includes at least one emergency diesel generator.

[0019] The first generator auxiliary equipment is further connected with at least one emergency diesel generator through the emergency distribution board.

[0020] The first generator auxiliary equipment outputs the diesel engine electric signal to the diesel generator after receiving a fifth electric signal output by at least one emergency diesel generator in the case of power failure.

[0021] In one embodiment, the second generator auxiliary module is connected in series with the first generator module through a fourth power supply controller, a fifth power supply controller and the second power supply controller.

[0022] In one embodiment, the third electric signal includes a gas turbine generator electric signal; the second generator auxiliary module includes at least two groups of second generator auxiliary equipment; the second generator auxiliary equipment includes gas turbine generator auxiliary equipment for outputting the gas turbine generator electric signal; the second power supply controller includes a medium-voltage distribution board; the fourth power supply controller includes a gas turbine auxiliary low-voltage distribution board; the fifth power supply controller includes a medium-voltage main distribution board; and the first generator module includes at least two diesel generators.

[0023] The auxiliary equipment of the gas turbine generator is connected in series with the low-voltage auxiliary power distribution board of the gas turbine, the main medium-voltage power distribution board, the medium-voltage power distribution board and the at least one diesel generator.

[0024] The low-voltage auxiliary power distribution board of the gas turbine and the main medium-voltage power distribution board are connected through a second transformer.

[0025] In one embodiment, the third electrical signal further comprises a steam turbine generator electrical signal; and the second generator auxiliary equipment further comprises a steam turbine generator auxiliary equipment for outputting the steam turbine generator electrical signal.

[0026] The auxiliary equipment of the gas turbine generator is connected in series with the low-voltage auxiliary power distribution board of the gas turbine, the main medium-voltage power distribution board, the medium-voltage power distribution board and the at least one diesel generator.

[0027] In one embodiment, the second generator module is connected in series with the second generator auxiliary module through a fifth power supply controller and a fourth power supply controller.

[0028] In one embodiment, the third electrical signal comprises a gas turbine generator electrical signal; the second generator module comprises at least one gas turbine generator; the second generator auxiliary module comprises at least two groups of second generator auxiliary equipment; the second generator auxiliary equipment comprises a gas turbine generator auxiliary equipment for outputting a gas turbine generator electrical signal; the fourth power supply controller comprises a low-voltage auxiliary power distribution board of a gas turbine; the fifth power supply controller comprises a main medium-voltage power distribution board; and the fourth electrical signal comprises a gas turbine generator power supply signal.

[0029] The at least one gas turbine generator is connected with the low-voltage auxiliary power distribution board of the gas turbine, the main medium-voltage power distribution board and the auxiliary equipment of the gas turbine generator.

[0030] The low-voltage auxiliary power distribution board of the gas turbine and the main medium-voltage power distribution board are connected through a second transformer; and the gas turbine generator generates the gas turbine generator power supply signal after receiving the gas turbine generator electrical signal output by the auxiliary equipment of the gas turbine generator.

[0031] In one embodiment, the third signal further comprises a steam turbine generator electrical signal; the second generator module comprises at least one steam turbine generator; the second generator auxiliary equipment further comprises a steam turbine generator auxiliary equipment for outputting the steam turbine generator electrical signal; the fourth electrical signal further comprises a steam turbine generator power supply signal; and the gas turbine generator is further configured to generate a heat signal.

[0032] At least one of the steam turbine generators is connected to the low-voltage auxiliary distribution board, the medium-voltage main distribution board and the steam turbine generator auxiliary equipment through the gas turbine steam turbine auxiliary low-voltage distribution board.

[0033] The steam turbine generator generates the steam turbine generator power supply signal after receiving the steam turbine generator auxiliary equipment output steam turbine generator electrical signal and receiving the heat signal generated by the gas turbine generator and the gas turbine with compressor waste heat boiler.

[0034] The above-mentioned automatic black start system first connects the first generator auxiliary module to the first generator set module, and the first generator auxiliary module outputs the first electrical signal to the first generator module, so that the first generator set module stably generates the second electrical signal in the black state. Second, the first generator module is connected to the second generator auxiliary module, and the second generator auxiliary module generates the third electrical signal after receiving the second electrical signal. Finally, the second generator module generates the fourth electrical signal after receiving the third electrical signal. By first automatically starting the first generator module with self-starting capability, the second generator module without self-starting capability is driven, the system recovery range is gradually expanded, and the recovery of the entire power system is finally realized. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is a schematic diagram of the automatic black start system in one embodiment.

[0036] Figure 2 It is a schematic diagram of the first generator auxiliary module connected to the first generator module and the third generator module in one embodiment.

[0037] Figure 3 It is a schematic diagram of the second generator auxiliary module connected to the first generator module in one embodiment.

[0038] Figure 4 It is a schematic diagram of the automatic black start system in another embodiment.

[0039] The first generator module 101, the first generator auxiliary module 102, the second generator auxiliary module 103, the second generator module 104, the third generator module 105, the first power supply controller 201, the second power supply controller 202, the third power supply controller 203, the fourth power supply controller 204, and the fifth power supply controller 205. DETAILED DESCRIPTION

[0040] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described herein and by one of ordinary skill in the art without departing from the spirit and scope of the present application, and it is therefore intended that all such variations be considered as falling within the scope of the present application. It should be understood that the use of the terms "include", "comprise" or "contain" herein should not be understood as limiting the present application to the features or steps described herein, but rather the use of these terms is intended to cover the presence of the features or steps described herein as well as the presence of other features or steps not described herein.

[0041] In the description of the present application, it should be understood that, if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0042] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined with "first", "second" can include at least one of the features explicitly or implicitly. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0043] In the present application, unless otherwise specifically defined and limited, if the terms "mount", "connect", "connect", "fix" and the like appear, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise specifically limited. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] In the present application, unless specifically defined otherwise, if there is a description of a first feature on a second feature, or similar descriptions, it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature can be above, above and above, and above the second feature, or the first feature can be directly above or obliquely above the second feature, or only indicate that the first feature is higher than the second feature in horizontal height. The first feature can be below, below and below, and below the second feature, or the first feature can be directly below or obliquely below the second feature, or only indicate that the first feature is lower than the second feature in horizontal height.

[0045] It should be noted that if an element is referred to as being "fixed to" or "set to" another element, it can be directly on the other element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for illustrative purposes and do not represent the only implementation.

[0046] Referring to Figure 1 , Figure 1 A schematic diagram of an automatic black start system in an embodiment of the present application is shown. The automatic black start system provided by the embodiment of the present application comprises a first generator module 101; a first generator auxiliary module 102 connected to the first generator module 101; a second generator auxiliary module 103 connected to the first generator module 101; a second generator module 104 connected to the first generator module 101 and the second generator auxiliary module 103; wherein the first generator auxiliary module 102 outputs a first electric signal to the first generator module 101; the first generator module 101 generates a second electric signal in a black power state after receiving the first electric signal; the second generator auxiliary module 103 generates a third electric signal after receiving the second electric signal; and the second generator module 104 generates a fourth electric signal after receiving the third electric signal.

[0047] Among them, the first, second, third and fourth electric signals can be current or voltage, or other electric signals. After the entire power system is shut down due to failure, the normal power supply system is completely powered off and is in a black power state.

[0048] Exemplarily, the first generator auxiliary module 102 is connected to the first generator module 101. In a period of time after the power system of the offshore floating project is blacked out, the first generator auxiliary module 102 handles the hot engine state, such as the lubricating oil pump and the cooling water device, so as to enable the first generator module 101 to start even in the power-off state and generate a second electric signal. The first generator auxiliary module 102 can include a pre-lubricating oil pump, a cylinder liner water heating device, a machine belt fuel pump, a cooling water pump, a machine cabin air brake, and an air bottle device. The pre-lubricating oil pump is not required for pre-lubrication of the first generator module 101 within 30 minutes after the first generator module 101 is stopped. The cylinder liner water heating device is not required for heating of the cylinder liner water of the first generator module 101 within a short period of time after the power is blacked out. The machine belt fuel pump meets the normal operation requirement of the diesel engine. The cooling water pump can include a fresh water cooling water pump and a sea water cooling water pump, and the first generator module 101 does not require cooling water within a short period of time after the power is blacked out. The air bottle device provides high-pressure air (up to 30 barg) for the first generator module 101. Instrument air of the machine cabin air brake is provided by the air bottle, so as to ensure that the machine cabin air brake is in an “on” state during black start.

[0049] It should be noted that the first generator auxiliary module 102 can operate or be self-sufficient during black-out, so as to enable the first generator module 101 to automatically start without relying on external factors during black-out.

[0050] Exemplarily, the second generator auxiliary module 103 is connected to the first generator module 101. After receiving the second electric signal, the second generator auxiliary module 103 generates a third electric signal and transmits the third electric signal to the second generator module 104. The second generator auxiliary module 103 includes a lubricating oil tank heater, an oil pump, a hydraulic starting pump, and a purging device. When the lubricating oil tank heater, the oil pump, the hydraulic starting pump, and the purging device are all started, the third electric signal is generated. After receiving the third electric signal, the second generator module 104 can start and generate a fourth electric signal to normally supply power to other modules in the automatic black start system.

[0051] In this embodiment, the first generator set module is connected to the first generator auxiliary module 102 first, the first generator auxiliary module 102 outputs a first electric signal to the first generator module 101, so that the first generator set module stably generates a second electric signal in a blackout state; secondly, the first generator module 101 is connected to the second generator auxiliary module 103, the second generator auxiliary module 103 generates a third electric signal after receiving the second electric signal, and finally, the second generator module 104 generates a fourth electric signal after receiving the third electric signal. By automatically starting the first generator module 101 with self-starting capability first, the second generator module 104 without self-starting capability is driven, the system recovery range is gradually expanded, and the recovery of the entire power system is finally automatically realized. The power grid outage time can be greatly reduced.

[0052] In combination with Figure 2 as shown, Figure 2 A schematic diagram of the connection between the first generator auxiliary module 102 and the first generator module 101 and the third generator module in an embodiment of the present application is shown. The first generator auxiliary module 102 is connected in series with the first generator module 101 through a first power supply controller 201 and a second power supply controller 202; the first generator auxiliary module 102 is also connected with the third generator module through a third power supply controller 203; wherein the first generator auxiliary module 102 receives a fifth electric signal generated by the third generator module in a power-off condition to output a first electric signal.

[0053] The power-off condition means that the first generator auxiliary module 102 is in a power-off state and in a cold state, and the cold state means that the first generator module 101 cannot be started.

[0054] Exemplarily, the first generator auxiliary module 102 is connected in series with the first generator module 101 through the first power supply controller 201 and the second power supply controller 202. The first generator auxiliary module 102 is also connected with the third generator module through the third power supply controller 203; wherein the third generator module can be an emergency generator module; the first generator auxiliary module 102 receives a fifth electric signal generated by the emergency generator module in a power-off condition and in a cold state, at which time the first generator auxiliary module 102 can be normally started to output a first electric signal.

[0055] In combination with Figure 3 as shown, Figure 3 A schematic diagram of the connection between the second generator auxiliary module 103 and the first generator module 101 in an embodiment of the present application is shown. The second generator auxiliary module 103 is connected in series with the first generator module 101 through a fourth power supply controller 204, a fifth power supply controller 205 and a second power supply controller 202.

[0056] The second, fourth and fifth power supply controllers can be provided with switches, and the number of switches is configured according to actual conditions.

[0057] Exemplarily, the second generator auxiliary module 103 is connected with the first generator module 101 in series through the fourth power supply controller 204, the fifth power supply controller 205 and the second power supply controller 202. When the switch is closed, the second generator auxiliary module 103 and the first generator module 101 are communicated, so that the second generator auxiliary module 103 receives the second electric signal emitted by the first generator module 101.

[0058] Continuing to combine Figure 3 as shown, Figure 3 A schematic diagram showing the connection between the second generator module 104 and the first generator module 101 in an embodiment of the present application is shown. The second generator module 104 is connected with the first generator auxiliary module 102 in series through the fourth power supply controller 204 and the fifth power supply controller 205.

[0059] Exemplarily, the second generator module 104 is connected with the first generator module 101 in series through the fourth power supply controller 204 and the fifth power supply controller 205. When the switch is closed, the second generator module 104 and the first generator module 101 are communicated.

[0060] Combining Figure 4 as shown, Figure 4 A schematic diagram showing the connection between the first generator auxiliary module 102 and the first generator module 101 in an embodiment of the present application is shown. The first generator auxiliary module 102 includes at least two groups of first generator auxiliary equipment; the first power supply controller 201 includes a diesel engine auxiliary low-voltage power distribution board; the second power supply controller 202 includes a medium-voltage power distribution board; the first generator module 101 includes at least two diesel generators; the first electric signal includes a diesel engine electric signal; each group of first generator auxiliary equipment is connected with at least one diesel generator through the diesel engine auxiliary low-voltage power distribution board and the medium-voltage power distribution board; wherein the medium-voltage power distribution board and the diesel engine auxiliary low-voltage power distribution board are connected through a first transformer; the first generator auxiliary equipment outputs the diesel engine electric signal to the diesel generator.

[0061] Exemplarily, the first generator auxiliary module 102 includes at least two groups of first generator auxiliary devices; wherein the first generator auxiliary devices include a lubricating oil pump, a cylinder jacket water pre-heater, a seawater cooling water pump, a fresh water cooling water pump, a cabin fan, etc., wherein the lubricating oil pump can be powered by an emergency power distribution board. When the diesel engine stops within 30 minutes, the diesel engine does not need to be pre-lubricated. After the power system is restored, the power station management system automatically starts the lubricating oil pump within 5 minutes. The cylinder jacket water pre-heater is powered by the emergency power distribution board, and the cylinder jacket water temperature is maintained before black start, so there is no need to heat again during black start. The seawater cooling water pump and the fresh water cooling water pump do not need cooling water for a short time after black start, and the seawater cooling water pump and the fresh water cooling water pump are automatically started within 5 minutes after the power system is restored. The cabin fan ensures that the airlock of the cabin is in the "open" state during black start.

[0062] The first generator module 101 includes at least two diesel generators; can include diesel generator #1 and diesel generator #2, can also include three diesel generators or multiple diesel generators.

[0063] When designing the diesel generator set, the cylinder jacket water pre-heater, the lubricating oil pump, the seawater cooling water pump, the fresh water cooling water pump, and the cabin fan are considered. The air intake of the entire power supply system can run or be self-sufficient during black power, and the diesel generator can be automatically started without relying on external factors during black power. The diesel generator adopts a dual-fuel generator to reduce the dependence on fuel gas during black power. During start-up, it is in fuel mode, and after the fuel gas system is restored, it is manually switched to gas mode. The diesel generator adopts air cooling to reduce the dependence on the cooling water system.

[0064] Each group of first generator auxiliary devices is connected to at least one diesel generator through a diesel engine auxiliary low-voltage power distribution board and a medium-voltage power distribution board; wherein the medium-voltage power distribution board and the diesel engine auxiliary low-voltage power distribution board are connected through a first transformer and a normally closed (NC) switch. Figure 4 Taking two groups of first generator auxiliary devices connected to two diesel generators as an example. The specific number can also be adjusted according to the number of first generator auxiliary devices and diesel generators of the offshore floating project.

[0065] Figure 4 A schematic diagram of the first generator auxiliary module 102 and the third generator module in an embodiment of the present application is shown. The third power supply controller 203 includes an emergency power distribution board; the third generator module includes at least one emergency diesel generator; the first generator auxiliary device is also connected to at least one emergency diesel generator through the emergency power distribution board; wherein the first generator auxiliary device receives the fifth electric signal output by the at least one emergency diesel generator under power failure, and outputs the diesel engine electric signal to the diesel generator.

[0066] Exemplarily, the first generator auxiliary module 102 comprises at least two groups of first generator auxiliary devices; wherein the first generator auxiliary devices comprise a lubricating oil pump and a cylinder jacket water pre-heater, when the lubricating oil pump and the cylinder jacket water pre-heater need to be connected to an electrical signal, the lubricating oil pump and the cylinder jacket water pre-heater are connected to the diesel engine auxiliary low-voltage distribution board through the emergency distribution board to supply power to the lubricating oil pump and the cylinder jacket water pre-heater in the first generator auxiliary devices. The emergency distribution board is connected to the diesel engine auxiliary low-voltage distribution board through a normally closed (NC) switch, so that the emergency distribution board can supply power to the diesel engine auxiliary low-voltage distribution board, and the diesel engine auxiliary low-voltage distribution board can also supply power to the emergency distribution board.

[0067] The first generator auxiliary device receives the fifth electrical signal output by the emergency diesel generator in the case of power failure and cold state, and then outputs the diesel engine electrical signal to the diesel generator.

[0068] It should be noted that the number of emergency diesel generators can be adjusted according to actual conditions.

[0069] Figure 4 Also shown is a schematic diagram of the connection between the second generator auxiliary module 103 and the first generator module 101 in an embodiment of the present application. The third electrical signal comprises a gas turbine generator electrical signal; the second generator auxiliary module 103 comprises at least two groups of second generator auxiliary devices; the second generator auxiliary devices comprise gas turbine generator auxiliary devices for outputting the gas turbine generator electrical signal; the second power supply controller 202 comprises a medium-voltage distribution board; the fourth power supply controller 204 comprises a gas turbine steam turbine auxiliary low-voltage distribution board; the fifth power supply controller 205 comprises a medium-voltage main distribution board; the first generator module 101 comprises at least two diesel generators; the gas turbine generator auxiliary devices are connected in series with the at least one diesel generator through the gas turbine steam turbine auxiliary low-voltage distribution board, the medium-voltage main distribution board and the medium-voltage distribution board; wherein the gas turbine steam turbine auxiliary low-voltage distribution board and the medium-voltage main distribution board are connected through a second transformer; and the medium-voltage main distribution board is connected to the medium-voltage distribution board.

[0070] Exemplarily, the second generator auxiliary module 103 comprises at least two groups of second generator auxiliary devices; the two groups of second generator auxiliary devices are connected through a normally open (NO) switch. One group of second generator auxiliary devices comprises gas turbine generator auxiliary devices and steam turbine generator auxiliary devices, wherein the gas turbine generator auxiliary devices comprise a lubricating oil tank heater, an oil pump, a purging system and a hydraulic starting pump, and are all powered by the first generator module 101. The gas turbine is accelerated to a self-sustaining speed by the hydraulic starting pump, and the hydraulic starting pump is driven by a variable frequency drive motor. The second generator auxiliary devices are connected to the first generator module 101, and after being powered on, the gas turbine generator auxiliary devices in the second generator auxiliary devices output the gas turbine generator electrical signal, so that the second generator module 104 receives the steam turbine generator electrical signal and supplies power.

[0071] The second generator auxiliary device is connected with the first generator module 101, and includes: the gas turbine generator auxiliary device is connected in series with the at least one diesel generator through a gas turbine auxiliary low-voltage distribution board, a medium-voltage main distribution board, a medium-voltage distribution board and the gas turbine auxiliary low-voltage distribution board and the medium-voltage main distribution board are connected through a second transformer and a normally closed (NC) switch; the medium-voltage main distribution board is connected with the medium-voltage distribution board.

[0072] Figure 4 The second generator auxiliary module 103 in another embodiment of the application is also shown in the schematic diagram of connection with the first generator module 101. The third electric signal also includes a gas turbine generator electric signal; the second generator auxiliary device also includes a gas turbine generator auxiliary device for outputting the gas turbine generator electric signal; the gas turbine generator auxiliary device is connected in series with the at least one diesel generator through a gas turbine auxiliary low-voltage distribution board, a medium-voltage main distribution board, a medium-voltage distribution board and the gas turbine auxiliary low-voltage distribution board and the medium-voltage main distribution board are connected through a second transformer and a normally closed (NC) switch; the medium-voltage main distribution board is connected with the medium-voltage distribution board.

[0073] Exemplarily, the second generator auxiliary device includes the gas turbine generator auxiliary device and the steam turbine generator auxiliary device, and the steam turbine generator auxiliary device is connected in series with the at least one diesel generator through a gas turbine auxiliary low-voltage distribution board, a medium-voltage main distribution board, a medium-voltage distribution board and the gas turbine auxiliary low-voltage distribution board and the medium-voltage main distribution board are connected through a second transformer and a normally closed (NC) switch; the medium-voltage main distribution board is connected with the medium-voltage distribution board.

[0074] Figure 4 The second generator auxiliary module 103 in another embodiment of the application is also shown in the schematic diagram of connection with the first generator module 101. The third electric signal also includes a gas turbine generator electric signal; the second generator auxiliary device also includes a gas turbine generator auxiliary device for outputting the gas turbine generator electric signal; the gas turbine generator auxiliary device is connected in series with the at least one diesel generator through a gas turbine auxiliary low-voltage distribution board, a medium-voltage main distribution board, a medium-voltage distribution board and the gas turbine auxiliary low-voltage distribution board and the medium-voltage main distribution board are connected through a second transformer and a normally closed (NC) switch; the medium-voltage main distribution board is connected with the medium-voltage distribution board.

[0075] Exemplarily, as Figure 4As shown, the second generator module 104 includes three gas turbine generators, and the second generator auxiliary module 103 includes two gas turbine generator auxiliary devices for outputting gas turbine generator electrical signals. The three gas turbine generators are connected to a medium-voltage main switchboard, and the gas turbine generator auxiliary devices are connected to a gas turbine auxiliary low-voltage switchboard. The medium-voltage main switchboard and the gas turbine auxiliary low-voltage switchboard are connected via a second transformer and a normally closed (NC) switch. After receiving the gas turbine generator electrical signals from the gas turbine generator auxiliary devices, the gas turbine generators generate power supply signals, which can be connected to the grid through the black start system.

[0076] Figure 4 A schematic diagram showing the connection between the second generator auxiliary module 103 and the second generator module 104 in another embodiment of the present application is also shown. The third signal also includes a steam turbine generator electrical signal; the second generator module 104 includes at least one steam turbine generator; the second generator auxiliary equipment also includes a steam turbine generator auxiliary device for outputting the steam turbine generator electrical signal; the fourth electrical signal also includes a steam turbine generator power supply signal; the gas turbine generator is also configured to generate a thermal signal; at least one steam turbine generator is connected to the steam turbine generator auxiliary device via a gas turbine auxiliary low-voltage switchboard and a medium-voltage main switchboard; wherein the steam turbine generator generates the steam turbine generator power supply signal after receiving the steam turbine generator electrical signal output by the steam turbine generator auxiliary device and the thermal signal generated by the gas turbine generator.

[0077] For example, Figure 4 As shown, the second generator module 104 includes a steam turbine generator, and the second generator auxiliary equipment includes a steam turbine generator auxiliary device for outputting steam turbine generator electrical signals. The steam turbine generator is connected to a medium-voltage main switchboard, and the steam turbine generator auxiliary device is connected to a gas turbine auxiliary low-voltage switchboard. The medium-voltage main switchboard and the gas turbine auxiliary low-voltage switchboard are connected via a second transformer and a normally closed (NC) switch. After receiving the steam turbine generator electrical signals output by the steam turbine generator auxiliary device and the thermal signals generated by the gas turbine generator and the waste heat boiler with a gas turbine compressor, the steam turbine generator generates a steam turbine generator power supply signal, which can be connected to the grid through the black start system.

[0078] For example, Figure 4As shown, the second generator module 104 includes three gas turbine generators and one steam turbine generator. The second generator auxiliary module 103 includes two gas turbine generator auxiliary devices for outputting gas turbine generator electrical signals and two steam turbine generator auxiliary devices for outputting steam turbine generator electrical signals; the three gas turbine generators and the one steam turbine generator are connected to the medium-voltage main distribution board; the gas turbine generator auxiliary devices and the steam turbine generator auxiliary devices are connected to the gas turbine and steam turbine auxiliary low-voltage distribution board; the medium-voltage main distribution board and the gas turbine and steam turbine auxiliary low-voltage distribution board are connected through the second transformer and the normally closed (NC) switch. When the gas turbine generator receives the gas turbine generator electrical signals output by the gas turbine generator auxiliary devices, the gas turbine generator generates gas turbine generator power supply signals, which can be used for power supply in the black start system; when the gas turbine generator generates the gas turbine generator power supply signals in the black start system, that is, through the black start system and grid power supply, the gas turbine generator itself generates heat signals; when the steam turbine generator receives the steam turbine generator electrical signals output by the steam turbine generator auxiliary devices and receives the heat signals generated by the gas turbine and the gas turbine with a compressor waste heat boiler, the steam turbine generator generates steam turbine generator power supply signals, and the steam turbine generator is connected to the grid through the black start system and grid power supply, thereby realizing the combined cycle power generation of the gas turbine generator and the steam turbine generator in the black start system.

[0079] It should be noted that the number of gas turbine generators, the number of steam turbine generators, the number of gas turbine generator auxiliary devices, and the number of steam turbine generator auxiliary devices in the embodiment are not specifically limited and can meet the actual needs of the black start system.

[0080] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not contradict, they should be considered within the scope of the present disclosure.

[0081] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be noted that for those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. An automatic black start system, characterized in that: The system comprises: a first generator module; a first generator auxiliary module connected to the first generator module; a second generator auxiliary module connected to the first generator module; a second generator module connected to the first generator module and the second generator auxiliary module; Among them, the first generator auxiliary module outputs a first electrical signal to the first generator module; after receiving the first electrical signal, the first generator module generates a second electrical signal in a black-out state; after receiving the second electrical signal, the second generator auxiliary module generates a third electrical signal; after receiving the third electrical signal, the second generator module generates a fourth electrical signal.

2. The system according to claim 1, wherein: The first generator auxiliary module is connected in series with the first generator module through a first power supply controller and a second power supply controller; The first generator auxiliary module is also connected to the third generator module via a third power supply controller; Wherein, when the power is off, the first generator auxiliary module receives the fifth electrical signal generated by the third generator module to output the first electrical signal.

3. The system according to claim 2, characterized in that The first generator auxiliary module includes at least two groups of first generator auxiliary equipment; the first power supply controller includes a diesel engine auxiliary low-voltage distribution board; the second power supply controller includes a medium-voltage distribution board; the first generator module includes at least two diesel generators; the first electrical signal includes a diesel engine electrical signal; Each group of the first generator auxiliary equipment is connected to at least one of the diesel generators through the diesel engine auxiliary low-voltage distribution board and the medium-voltage distribution board; The medium-voltage distribution board and the diesel engine auxiliary low-voltage distribution board are connected through a first transformer; the first generator auxiliary equipment outputs the diesel engine electrical signal to the diesel generator.

4. The system according to claim 3, characterized in that The third power supply controller includes an emergency distribution board; the third generator module includes at least one emergency diesel generator; The first generator auxiliary equipment is also connected to at least one of the emergency diesel generators through the emergency switchboard; Wherein, in the event of a power outage, the first generator auxiliary equipment receives the fifth electrical signal output by at least one of the emergency diesel generators and outputs the diesel engine electrical signal to the diesel generator.

5. The system according to claim 1, wherein: The second generator auxiliary module is connected in series with the first generator module through the fourth power supply controller, the fifth power supply controller and the second power supply controller.

6. The system according to claim 5, characterized in that The third electrical signal includes a gas turbine generator electrical signal; the second generator auxiliary module includes at least two sets of second generator auxiliary equipment; the second generator auxiliary equipment includes a gas turbine generator auxiliary equipment for outputting the gas turbine generator electrical signal; the second power supply controller includes a medium-voltage distribution board; the fourth power supply controller includes a gas turbine auxiliary low-voltage distribution board; the fifth power supply controller includes a medium-voltage main distribution board; the first generator module includes at least two diesel generators; The gas turbine generator auxiliary equipment is connected in series with at least one of the diesel generators through the gas turbine auxiliary low-voltage distribution board, the medium-voltage main distribution board, and the medium-voltage distribution board; The gas turbine and steam turbine auxiliary low-voltage distribution board and the medium-voltage main distribution board are connected via a second transformer; and the medium-voltage main distribution board is connected to the medium-voltage distribution board.

7. The system according to claim 6, characterized in that The third electrical signal also includes a steam turbine generator electrical signal; the second generator auxiliary device also includes a steam turbine generator auxiliary device for outputting the steam turbine generator electrical signal; The steam turbine generator auxiliary equipment is connected in series with at least one diesel generator through the gas turbine auxiliary low-voltage distribution board, the medium-voltage main distribution board, and the medium-voltage distribution board.

8. The system according to claim 1, wherein: The second generator module is connected in series with the second generator auxiliary module through a fifth power supply controller and a fourth power supply controller.

9. The system according to claim 8, characterized in that The third electrical signal includes a gas turbine generator electrical signal; the second generator module includes at least one gas turbine generator; the second generator auxiliary module includes at least two sets of second generator auxiliary equipment; the second generator auxiliary equipment includes a gas turbine generator auxiliary equipment for outputting the gas turbine generator electrical signal; the fourth power supply controller includes a gas turbine auxiliary low-voltage switchboard; the fifth power supply controller includes a medium-voltage main switchboard; the fourth electrical signal includes a gas turbine generator power supply signal; At least one of the gas turbine generators is connected to the gas turbine generator auxiliary equipment through the gas turbine auxiliary low-voltage switchboard and the medium-voltage main switchboard; Among them, the gas turbine and steam turbine auxiliary low-voltage distribution board and the medium-voltage main distribution board are connected through a second transformer; the gas turbine generator generates the gas turbine generator power supply signal after receiving the gas turbine generator electrical signal output by the gas turbine generator auxiliary equipment.

10. The system according to claim 9, characterized in that The third electrical signal also includes a steam turbine generator electrical signal; the second generator module includes at least one steam turbine generator; the second generator auxiliary equipment also includes a steam turbine generator auxiliary equipment for outputting the steam turbine generator electrical signal; the fourth electrical signal also includes a steam turbine generator power supply signal; the gas turbine generator is further used to generate a heat signal; At least one of the steam turbine generators is connected to the steam turbine generator auxiliary equipment through the gas turbine auxiliary low-voltage switchboard and the medium-voltage main switchboard; The steam turbine generator generates the steam turbine generator power supply signal after receiving the steam turbine generator electrical signal output by the steam turbine generator auxiliary equipment and receiving the thermal signal generated by the gas turbine generator.

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