Hybrid driving system and hybrid wind turbine installation vessel having energy matching function

Abstract

A hybrid driving system and a hybrid wind turbine installation vessel having an energy matching function. The hybrid driving system comprises an energy supply assembly. The energy supply assembly comprises diesel generator sets (G1), an emergency diesel generator set (G21) and battery packs (14); under different load conditions, different numbers of diesel generator sets (G1) are started to supply energy to a wind turbine installation vessel; when the diesel generator sets (G1) provide sufficient energy, the excess electricity is stored in the battery packs (14), and when the energy supply is insufficient, the diesel generator sets (G1) can work in conjunction with the battery packs (14) to supply energy to the wind turbine installation vessel; and when the diesel generator sets (G1) fail, the battery packs (14) supply energy until the emergency diesel generator set (G21) is started. When the wind turbine installation vessel works, a dynamic positioning system collects environment signals by means of sensors, and the hybrid driving system adjusts the starting number, the rotating speed and the direction angle of propellers (005), so that a vessel body (001) is always at a preset position.

Description

A hybrid drive system and a hybrid wind power installation vessel with energy matching function Technical Field

[0001] The present invention belongs to the technical field of offshore wind turbine installation equipment, and in particular relates to an oil-electric hybrid drive system and a hybrid wind turbine installation vessel with an energy matching function. Background Art

[0002] With energy challenges intensifying in recent years, the exploration and utilization of new energy sources has become a global hotspot. Shallow waters near continental shores, free from obstructing mountains and buildings, offer abundant wind resources, making them ideal for wind power generation. Consequently, countries around the world have been rapidly increasing their construction of offshore wind power facilities. However, offshore wind power installation requires overcoming environmental factors such as wind, waves, and currents, leading to the development of specialized wind turbine installation vessels.

[0003] Traditional offshore wind turbine installation vessels typically rely on generators to power the vessel. In the event of a generator failure, batteries and emergency generators provide power. To ensure optimal performance, the vessel's engines must be rated for both harsh sea conditions and full load. However, when the vessel is underloaded, the high installed power consumption leads to low system efficiency and significant losses. Furthermore, dynamic positioning performance is limited by the installed power factor, creating an urgent need for those skilled in the art to address these issues. Summary of the Invention

[0004] In view of the above-mentioned existing problems and defects, the present invention designs the oil-electric hybrid drive system and the hybrid wind power installation vessel with energy matching function.

[0005] To solve the above technical problems, the present invention relates to a hybrid drive system. The energy supply component provides energy for a wind turbine installation vessel, and is characterized in that: the energy supply component includes at least one diesel generator set, at least one battery pack, and at least one emergency diesel generator set; different numbers of diesel generator sets are activated to power the wind turbine installation vessel according to different load requirements; when the diesel generator sets provide sufficient energy for the wind turbine installation vessel, excess electricity flows into the battery pack, and the emergency diesel generator set is in standby mode; when the diesel generator sets provide insufficient energy, the diesel generator sets and the battery packs combine to supply energy to the wind turbine installation vessel; and in the event of a diesel generator set failure, the battery packs provide energy until the emergency diesel generator set is activated.

[0006] Furthermore, the energy supply components are connected by circuits, which include diesel generator sets, emergency diesel generator sets, shore power, frequency converters, air circuit breakers, bus tie circuit breakers, AC transformers, thrusters, battery packs, DC transformers, fuses, rectifier / inverter dual-function transmitters, loads, main distribution boards, battery distribution boards, emergency distribution boards, and bus tie circuit breakers that separate the main distribution boards. The main distribution boards control the flow of power generated by the energy supply components into designated loads. When the diesel generator sets supply power, the air circuit breakers are closed, and the power supplied by the diesel generator sets is fed into the AC distribution board busbars of the 11KV main distribution board, and then passes through the air circuit breakers, AC transformers, and frequency converters to enter the thrusters. The thrusters make the thrusters work and keep the wind turbine installation vessel running at sea; the AC distribution board bus of the 11KV main distribution board introduces electricity into the AC distribution board bus of the 690V main distribution board through the circuit and supplies power to the corresponding loads. At the same time, the AC distribution board bus of the 690V main distribution board introduces electricity into the AC distribution board bus of the 230V main distribution board through the circuit and supplies power to the corresponding low-voltage loads; the battery pack is charged through circuit rectification and discharged through circuit inversion; when the main power supply is cut off, the emergency diesel generator set automatically starts within 45 seconds and is connected to the emergency distribution board. Before the emergency diesel generator set starts, it is powered by the battery pack.

[0007] The design of the diesel generator sets and main switchboards ensures a stable power supply for the wind turbine installation vessel while operating at sea. Even if the main power source fails, the emergency diesel generator sets can be quickly activated to ensure power supply to critical equipment, improving the reliability and stability of the wind turbine installation vessel. The coordinated operation of equipment such as air circuit breakers, AC transformers, and frequency converters enables power supply and management of different loads. The design of the 11kV, 690V, and 230V main switchboards enables power to be distributed to different loads on demand, improving the flexibility and controllability of the power supply.

[0008] Furthermore, it also includes a battery pack charging branch, a battery pack discharging branch, a transformer branch, a load branch, an emergency charging branch and a driving branch; the battery pack charging branch is electrically connected to the first AC transformer, the fuse, the second air circuit breaker, the rectifier / inverter dual-function transmitter, the DC transformer, and the battery pack in sequence through the first air circuit breaker; the battery pack discharging branch is the battery pack, the DC transformer, the rectifier / inverter dual-function transmitter, the second air circuit breaker, the fuse, the first AC transformer, and the first air circuit breaker in sequence; the transformer branch includes the third air circuit breaker, the second AC transformer, and the fourth air circuit breaker; the AC transformer is three Phase AC transformer; the transformer branch consists of an 11KV-690V transformer branch and a 690V-230V transformer branch; the load branch consists of a 690V load branch and a 230V load branch; the emergency charging branch consists of a 690V emergency charging branch and a 230V emergency transformer charging branch; the generator set and shore power in the power supply branch are connected through the first inverter, the fifth air circuit breaker and the 11KV main distribution board; the propulsion branch is connected in sequence to the sixth air circuit breaker, the third AC transformer, the second inverter, and the propeller, and the main distribution board consists of an 11KV main distribution board, a 690V main distribution board, and a 230V main distribution board; The 11KV main distribution board is separated by multiple AC distribution board buses through bus tie circuit breakers. The 11KV main distribution board is powered by diesel generator set A and has B propulsion branches, C charging and discharging branches, and D transformer branches connected below. The 690V main distribution board is separated by multiple AC distribution board buses through bus tie circuit breakers. F load branches, G emergency charging branches, and H transformer branches are connected below the 690V main distribution board. The 230V main distribution board is separated by multiple AC distribution board buses through bus tie circuit breakers. J load branches are connected below the 230V main distribution board. K emergency transformer charging branches are connected below the emergency distribution board. The emergency charging branch under the 690V main distribution board includes the seventh air circuit breaker, and the emergency branch is divided into L strips, which are separated by the busbar circuit breaker in the AC distribution board bus to maintain emergency power supply when a section of the AC distribution board bus fails; there are M emergency charging branches on the 230V main distribution board, which are led out from the 690V main distribution board, including the eighth air circuit breaker, the fourth AC transformer, and the ninth air circuit breaker. They are separated by the busbar circuit breaker during convergence to ensure stable operation of the system; the number of battery packs is N.

[0009] The layout of each branch realizes the comprehensive consideration of power supply and can take emergency measures in case of failure to ensure the normal operation of the system.

[0010] Furthermore, the bus tie circuit breaker of the 11KV main distribution board is a normally closed switch; the bus tie circuit breaker of the 690V main distribution board is a normally open switch; and the bus tie circuit breaker of the 230V main distribution board is a normally open switch.

[0011] It can isolate system faults and improve system security and flexibility.

[0012] Furthermore, the dynamic positioning system and the hull are powered by a hybrid drive system. The dynamic positioning system includes sensors and thrusters. The sensors include position sensors, wind sensors, and water flow velocity sensors. The dynamic positioning system transmits ambient environmental signals to the hybrid drive system by installing position sensors, wind sensors, and water flow velocity sensors on the hull. The hybrid drive system controls related circuits based on the sensor signals to adjust the number of thrusters opened, the rotation speed, and the direction angle to ensure that the hull is always in the preset position.

[0013] Furthermore, the offshore wind power installation vessel also includes pile legs and lifting piles, and the lifting piles are fixedly connected to the hull, and the racks on the pile legs are engaged with the gears on the lifting piles; the pile legs are symmetrically distributed on the deck along the bow direction.

[0014] This design can provide stable support for the hull and has a higher load-bearing capacity.

[0015] Furthermore, the propeller includes a rotary propeller, a bow thruster and a retractable propeller; the bow thruster is located at the bow; the retractable propeller is located in the middle of the ship; the rotary propeller is located at the stern;

[0016] Make the ship's position more controllable.

[0017] Furthermore, the number of bow thrusters is O, which can rotate forward and reverse, corresponding to the bow running in different directions respectively; the number of retractable thrusters is P, which can assist in operation when the resistance is large and can be retracted when the resistance is not large; the number of rotary thrusters is Q, and the rotation angle is R°. The installation of bow thrusters, retractable thrusters and rotary thrusters enhances the ship's ability to withstand adverse weather conditions and improves the application efficiency of the thrusters.

[0018] Furthermore, the offshore wind power installation vessel also includes a lifting mechanism; the lifting mechanism includes a crane turntable and a crane, and the operation of the crane and the rotation of the crane turntable are controlled by a hybrid drive system; the crane turntable is connected to the crane; the number of cranes is S, which are installed on the crane turntable and can rotate by an angle of T degrees; the length, width and height ratio of the hull is approximately U:V:W; the ratio of the hull length to the pile leg length is approximately X:Y; the ratio of the hull length to the crane length is approximately a:b.

[0019] Vessels equipped with a crane revolving table and crane have advantages such as enhanced lifting capacity and improved operational efficiency. These features enable vessels to handle complex lifting tasks and improve operational efficiency and safety.

[0020] Furthermore, the number of column-type cargoes is c, which are installed on the hull.

[0021] As part of the superstructure, reasonable layout can make the ship bear reasonable forces and affect the center of gravity of the ship.

[0022] The beneficial effects of the present invention are:

[0023] (1) The energy supply system of the present invention includes a diesel generator set, an emergency diesel generator set and a battery pack. When the diesel generator set has sufficient energy, the excess electric energy can be stored in the battery pack. In the event of a failure of the diesel generator set, the diesel generator set cannot supply power normally, and the energy stored in the battery pack needs to be used to supply energy to the hull. The emergency diesel generator set is started within a certain period of time to ensure the normal operation of the ship, the safety of the hull, and the normal operation of the ship. When the diesel generator set has insufficient energy, the battery pack can be used to increase the energy of the hull. This design of multiple energy sources ensures the sustainability of the system and can provide sufficient working power even in certain extreme situations.

[0024] (2) During offshore wind power installation, the wind power installation vessel needs to be in a preset position and kept stable, and then the truss pile legs need to be lowered to keep the offshore wind power installation vessel in the preset position. However, it is difficult to ensure that the preset position of the offshore wind power installation vessel does not change due to the influence of the offshore environment. The traditional offshore wind power installation platform is complicated to install and cannot be accurately positioned. The present invention sets a dynamic positioning system on the hull, and transmits information such as wind, waves and currents at sea to each propeller through sensors in real time. The propeller offsets the influence of wind, waves and currents at sea by adjusting the direction angle and speed, which can ensure that the offshore wind power installation vessel is in the preset position, facilitating the subsequent installation work;

[0025] (3) Offshore wind turbines need to be installed at a preset position. The present invention sets truss pile legs on the hull, connects the lifting pile fixing area and the truss pile legs through gear racks, controls the lifting of the truss pile legs, and extends multiple truss pile legs into the seabed to fix the offshore installation vessel; the hull is also equipped with a superstructure including a power supply room, column-type cargo and a helicopter platform to provide support for the normal navigation and installation operations of the ship; the grouping of thrusters on the hull ensures the safety and flexibility of the offshore wind turbine installation vessel. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] FIG1 is a diagram of a power distribution system according to the present invention.

[0028] FIG2 is a diagram of the power supply branch in FIG1 .

[0029] FIG3 is a diagram of the push branch in FIG1 .

[0030] FIG4 is a diagram of the 11KV-690V transformer branch in FIG1 .

[0031] FIG5 is a diagram of the 690V-230V transformer branch in FIG1 .

[0032] FIG6 is a 690V load branch diagram in FIG1.

[0033] FIG7 is a 230V load branch diagram in FIG1 .

[0034] FIG8 is a diagram of the charge and discharge branches of the battery pack in FIG1 .

[0035] FIG9 is a diagram of the 690V emergency charging branch circuit in FIG1 .

[0036] FIG10 is a diagram of the 230V emergency transformer charging branch circuit in FIG1 .

[0037] FIG11 is a diagram showing thruster grouping in a dynamic positioning system according to an embodiment of the present invention.

[0038] FIG12 is a diagram showing the working principle of the dynamic positioning system according to an embodiment of the present invention.

[0039] FIG13 is a perspective view of a hull according to an embodiment of the present invention.

[0040] FIG14 is a rear view of the hull in the embodiment of the present invention.

[0041] FIG15 is a side view of the hull in an embodiment of the present invention.

[0042] In the figure, 001 - hull; 002 - crane; 0021 - crane rotary platform; 003 - truss pile legs; 0031 - lifting pile fixing area; 004 - superstructure; 0041 - helicopter platform; 0042 - column-type cargo; 0043 - power supply room; 005 - thruster; 0051 - rotary thruster; 0052 - bow thruster; 0053 - retractable thruster; DETAILED DESCRIPTION

[0043] The following is a further detailed description of the present invention in conjunction with the accompanying drawings. Referring to Figures 13, 14 and 15, it can be seen that the entire ship layout of the wind power installation vessel mainly includes a hull 001, a crane rotating platform 0021, a truss-type pile leg 003, a crane 002, a power supply room 0043, a helicopter platform 0041, a lifting and fixing pile area 0031, a column-type cargo 0042, a rotary thruster 0051, a bow thruster 0052, and a retractable thruster 0053. The hull 001 is equipped with column-type cargo 0042, power supply room 0043 and helicopter platform 0041. The lifting pile area 0031 is connected to the truss pile leg 003 through a gear rack. The truss pile leg 003 is equipped with a crane rotating platform 0021. The crane rotating platform 0021 is connected to the crane 002. The lifting pile area 0031 is fixed between the hull 001 and the truss pile leg 003. The bow thruster 0052 is located at the bow, the retractable propeller 0053 is located in the ship, and the rotary propeller 0051 is located at the stern. The hull 001 is equipped with 4 The ship features three truss-type legs 003 of equal length and symmetrical distribution. Three bow thrusters 0052 are installed at the bow end of the hull 001. Two retractable thrusters 0053 are installed mid-ship, retractable within the hull. Four rotary thrusters 0051 are installed at the stern. One crane 002 is mounted on a crane revolving platform 0021, capable of 360-degree rotation. Three column-type cargo units 0042 are installed on the deck. The length, width, and height ratio of the hull 001 is approximately 13:5:1. The ratio of the hull 001 length to the truss-type legs 003 length is approximately 5:4, and the ratio of the hull 001 length to the crane 002 length is approximately 5:6. The bow thrusters 0052 can rotate forward and reverse, corresponding to the bow's direction of travel. Retractable thrusters 0053 assist in operation when resistance is high and retract when resistance is low. Rotary thrusters 0051 rotate 360 ​​degrees, adjusting their angles to suit different directional requirements. When hull 001 approaches wind turbines, the lifting and stabilizing piles 0031 lower the pile legs, lifting the vessel to the desired position. The crane revolving platform 0021 rotates to position crane 002 horizontally, and the joints of crane 002 rotate to raise it vertically, completing the installation of the wind turbines. A helicopter can be placed on the bow helicopter platform 0041. Under the dynamic positioning system, the thrusters' direction and speed can be adjusted to maintain hull 001 in the desired position during navigation, lifting, and port entry.

[0044] 1, it can be seen that the power distribution system diagram of the wind power installation vessel is marked as follows: diesel generator set G1, shore power 2, first inverter 3, first air circuit breaker 4, second air circuit breaker 5, third air circuit breaker 6, first bus tie circuit breaker 7, second bus tie circuit breaker 8, third bus tie circuit breaker 9, first AC transformer 10, second inverter 11, thruster group 12, second AC transformer 13, battery pack 14, DC transformer 15, fuse 16, fourth air circuit breaker 17, rectifier / inverter dual-function transmitter 18, fifth air circuit breaker 19, bus tie circuit breaker 20, emergency diesel generator set G21, sixth air circuit breaker 22, seventh air circuit breaker 23, third AC transformer 24, eighth air circuit breaker 2 5. Ninth air circuit breaker 26, tenth air circuit breaker 27, fourth AC transformer 28, first load 29, eleventh air circuit breaker 30, fourth bus tie breaker 31, twelfth air circuit breaker 32, second load 33, 11KV main distribution board A1, 690V main distribution board A2, 230V main distribution board A3, battery distribution board B, emergency distribution board C, power supply branch 000, drive branch 100, 11KV-690V transformer branch 110a, 690V-230V transformer branch 110b, 690V load branch 120a, 230V load branch 120b, battery pack charging and discharging branch 130, 690V emergency charging branch 140a, 230V emergency transformer charging branch 140b.

[0045] The power station layout of the wind turbine installation ship includes 4 diesel generator sets G1, 1 emergency diesel generator set G21, 11KV main distribution board A1, 690V main distribution board A2, 230V main distribution board A3, battery distribution board B, emergency distribution board C, power branch 000, propulsion branch 100, 11KV-690V transformer branch 110a, 690V-230V transformer branch 110b, 690V load branch 120a, 230V load branch 120 b, battery pack charging and discharging branch 130, 690V emergency charging branch 140a, 230V emergency transformer charging branch 140b; the main distribution board consists of 11KV main distribution board A1, 690V main distribution board A2, and 230V main distribution board A3; the transformer branch consists of 11KV-690V transformer branch 110a and 690V-230V transformer branch 110b; the load branch consists of 690V load branch 120a and 230V load branch 120b; emergency charging The branch consists of a 690V emergency charging branch 140a and a 230V emergency transformer charging branch 140b; the 11KV main distribution board A1 is separated by 4 AC distribution board buses through a busbar circuit breaker. The 11KV main distribution board A1 is powered by 4 diesel generators G1 and shore power 2, and is connected to 9 driving branches 100, 4 battery pack charging and discharging branches 130, and 4 transformer branches 110a below; the 690V main distribution board A2 is separated by 4 AC distribution board buses through a busbar circuit breaker. The 690V main distribution board A2 is separated by a busbar and has four load branches 120a, two emergency charging branches 140a, and four transformer branches 110b connected to it. The 230V main distribution board A3 is separated by four AC distribution board buses through a busbar circuit breaker. The 230V main distribution board A3 is connected to four load branches 120b. The emergency distribution board C is connected to two emergency transformer charging branches 140b. There are four battery distribution boards B, which constitute four battery pack charging and discharging branches 130.

[0046] 2 , it can be seen that the power branch 000 sequentially passes through the diesel generator G1 or shore power 2, the first inverter 3, and the first air circuit breaker 4, inputting electricity into the 11 KV main distribution board A1. The electricity in the 11 KV main distribution board A1 is then distributed through subsequent branches.

[0047] Referring to Figure 3, the propellers 12 in the propulsion branch 100 are divided into four rotary propellers, referred to as CT1, CT2, CT3, and CT4; three bow thrusters, referred to as AT1, AT2, and AT3; and two retractable propellers, referred to as BT1 and BT2. Power is supplied sequentially through the 11KV main switchboard A1, the third air circuit breaker 6, the first AC transformer 10, the second inverter 11, and the propeller group 12, enabling the propeller group 12 to operate and thus move the vessel.

[0048] Referring to Figure 4 , we can see that the 11kV-690V transformation branch 110a sequentially transforms the power from the 11kV main distribution board A1 through the third air circuit breaker 6, the second AC transformer 13, the fifth air circuit breaker 19, and the 690V main distribution board A2. The power from the 690V main distribution board A2 is then distributed through subsequent branches.

[0049] 5 , it can be seen that the 690V-230V transformer branch 110b sequentially passes through the 690V main distribution board A2, the tenth air circuit breaker 27, the fourth AC transformer 28, the eleventh air circuit breaker 30, and the 230V main distribution board A3, transforming the electricity from the 690V main distribution board A2 to the 230V main distribution board A3. The electricity in the 230V main distribution board A3 is then distributed through subsequent branches.

[0050] 6 , it can be seen that the 690V load branch 120a is powered by the 690V main distribution board A2, which in turn supplies power to the 690V main distribution board A2, the tenth air circuit breaker 27, and the first load 29.

[0051] 7 , it can be seen that the 230V load branch 120b is powered by the 230V main distribution board A3, which in turn supplies power to the 230V main distribution board A3, the twelfth air circuit breaker 32, and the second load 33.

[0052] Referring to Figure 8 , it can be seen that the battery pack charge and discharge branch 130 is divided into a battery pack charging process and a battery pack discharging process. The circuit operation during the battery pack charging process is, in order: 11kV main distribution board A1, third air circuit breaker 6, first AC transformer 10, fuse 16, fourth air circuit breaker 17, rectifier / inverter dual-function transmitter 18, battery distribution board B, DC transformer 15, and battery pack 14. The circuit operation during the battery pack discharging process is, in order: battery pack 14, DC transformer 15, battery distribution board B, rectifier / inverter dual-function transmitter 18, air circuit breaker 17, fuse 16, first AC transformer 10, third air circuit breaker 6, and 11kV main distribution board A1. By switching between the two processes, the battery pack charge and discharge branch 130 can effectively eliminate excess power and compensate for deficiencies.

[0053] 9 , it can be seen that the 690V emergency charging branch 140a passes through the 690V emergency distribution board C, the ninth air circuit breaker 26, and the 690V main distribution board A2 in sequence, so that the emergency distribution board C supplies power to the 690V main distribution board A2.

[0054] Referring to Figure 10 , it can be seen that the 230V emergency transformer charging branch 140b passes through the 690V emergency distribution board C, the seventh air circuit breaker 23, the third AC transformer 24, the eighth air circuit breaker 25, and the 230V main distribution board A3 in sequence, thereby supplying power from the emergency distribution board C to the 230V main distribution board A3.

[0055] Under normal power supply conditions, the wind turbine installation vessel is powered by diesel generator set G1. When diesel generator set G1 is supplying power, the first air circuit breaker 4 closes, and the power from diesel generator set G1 is fed into the AC distribution busbar of the 11kV main switchboard A1. This busbar distributes the power, passing through the third air circuit breaker 6, the first AC transformer 10, and the second frequency converter 11, before entering the thruster assembly 12, activating the thruster assembly 12 and enabling hull 001 to operate at sea. The power from the 11kV main switchboard A1 AC distribution busbar is then fed into the AC distribution busbar of the 690V main switchboard A2 via the 11kV-690V transformer branch 110a, supplying power to the corresponding loads 29. Simultaneously, the AC distribution busbars of the 690V main distribution board A2 are fed into the AC distribution busbars of the 230V main distribution board A3 via the 690V-230V transformer branch 110b, supplying power to the corresponding low-voltage loads 33. Throughout this process, the battery pack 14, via the battery pack charge-discharge branch 130, can compensate for any shortfalls. In the event of a main power outage, the emergency generator G21 should automatically start within 45 seconds and connect to the emergency distribution board. Before the emergency generator starts, the battery pack will supply power to maintain essential loads.

[0056] Referring to Figures 11 and 12, it can be seen that position sensors, water flow sensors, and wind sensors are installed on the ship. When the position of the ship changes due to the influence of waves, the dynamic positioning system is activated. The change in the ship's position is detected by the position sensor, and the forces of wind, waves, and currents are detected by the water flow sensor and wind sensor. The required reverse force can be calculated. Combined with the position information, the dynamic positioning system calculates the propeller speed and azimuth information. The speed signal is input to CT1 and AT3, CT2 and AT2, CT3 and AT1, and the azimuth signal is input to CT1, CT2, and propeller CT3. The propeller adjusts its own speed and azimuth to the set value based on the signal, so that the ship reaches the new position. During this process, it continuously compares and adjusts with the preset position until the ship remains in the predetermined position.

[0057] Referring to Figures 11 and 12, it can be seen that under normal navigation conditions, the number of thrusters is optimized based on the hull load. When the load is low, a small number of thrusters can be activated to meet navigation requirements. At the same time, the number of diesel generator sets activated is optimized, and running them at full power can meet the power supply requirements of the matched thrusters, maximizing the efficiency of each diesel generator set. When the load is high, more thrusters need to be activated, and more diesel generator sets need to be activated and run at full power to meet the thrust requirements of the matched thrusters.

[0058] During light-load sailing, the propellers require less power, so the diesel generators generate excess energy even when operating at full power. At this time, the number of diesel generators and propellers is optimized to reduce the number of diesel generators operating. Meanwhile, excess power generated by the diesel generators is stored in the battery pack via the battery charging branch. This energy is then available for use when needed.

[0059] Under heavy loads or extremely harsh sailing conditions, the vessel's speed slows due to environmental factors. In these situations, the number of diesel generators and propellers must be optimized to ensure that all are operational. Furthermore, relying solely on the diesel generators is insufficient to maintain the propulsion of the propellers. Therefore, the battery pack's electrical energy is utilized, sequentially passing through the battery discharge branch and the propulsion branch. This energy is then transferred from the battery pack to the propellers, enabling them to operate normally and thus maintaining the vessel's prescribed direction and speed.

[0060] When a ship is operating under a dynamic positioning system under heavy loads or extremely harsh sailing conditions, strong winds and waves may necessitate optimizing the number of diesel generator sets and propellers to ensure that all are operational. However, the propeller thrust is low, and the ship's position fluctuates dramatically in the waves. Power from the diesel generator sets alone is insufficient to maintain the propellers' thrust, resulting in poor dynamic positioning accuracy. At this point, the energy stored in the battery packs must be utilized. This energy is fed from the battery packs to the propellers via the battery pack discharge and propulsion branches. The diesel generator sets and batteries simultaneously power the propellers, ensuring that each propeller set operates at the specified azimuth and speed according to the signals, enabling the ship to withstand the effects of wind and waves.

[0061] In the event of a diesel generator failure, the generator will not be able to supply power normally. In this case, the air circuit breaker corresponding to the diesel generator will be disconnected. The energy stored in the battery pack will be used to input power from the battery pack to the propeller through the battery pack discharge branch and the propulsion branch, ensuring the normal operation of the ship, the normal operation of the dynamic positioning system, and the safety of the hull.

[0062] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An oil-electric hybrid drive system, suitable for driving and supplying energy to a wind power installation vessel, comprising an energy supply component; the energy supply component provides energy for the wind power installation vessel, characterized in that: The energy supply component includes at least one diesel generator set, at least one battery group and at least one emergency diesel generator set; different numbers of the diesel generator sets are turned on to supply energy to the wind power installation ship according to different load requirements. When the diesel generator set provides sufficient energy to the wind power installation ship, excess electric energy flows into the battery group, and the emergency diesel generator set is in standby mode; when the diesel generator set does not supply enough energy, the diesel generator set combines with the battery group to supply energy to the wind power installation ship; when the diesel generator set fails, the battery group supplies energy until the emergency diesel generator set starts.

2. The oil-electric hybrid drive system according to claim 1, characterized in that: The energy supply components are connected by a circuit, which includes a diesel generator set, an emergency diesel generator set, shore power, a frequency converter, an air circuit breaker, a busbar circuit breaker, an AC transformer, a thruster, a battery pack, a DC transformer, a fuse, a rectifier / inverter dual-function transmitter, a load, a main distribution board, a battery distribution board, and an emergency distribution board. The busbar circuit breaker separates the main distribution board; the main distribution board controls the power generated by the energy supply components to flow into a designated load. When the diesel generator set supplies power, the air circuit breaker is closed, and the power supplied by the diesel generator set is merged into the AC distribution board bus of the 11KV main distribution board, and enters the specified load through the air circuit breaker, the AC transformer and the frequency converter. The thruster is made to work to maintain the wind power installation ship running at sea; the AC distribution board bus of the 11KV main distribution board introduces electricity into the AC distribution board bus of the 690V main distribution board through the circuit, and supplies power to the corresponding load. At the same time, the AC distribution board bus of the 690V main distribution board introduces electricity into the AC distribution board bus of the 230V main distribution board through the circuit, and supplies power to the corresponding low-voltage load; the battery pack is charged by circuit rectification and discharged by circuit inversion; when the main power supply is cut off, the emergency diesel generator set automatically starts within 45s and is connected to the emergency distribution board. Before the emergency diesel generator set is started, it is powered by the battery pack.

3. The oil-electric hybrid drive system according to claim 2, characterized in that: It also includes a battery pack charging branch, a battery pack discharging branch, a transformer branch, a load branch, an emergency charging branch and a driving branch; the battery pack charging branch is electrically connected to the first AC transformer, the fuse, the second air circuit breaker, the rectifier / inverter dual-function transmitter, the DC transformer, and the battery pack in sequence through the first air circuit breaker; the battery pack discharging branch is the battery pack, the DC transformer, the rectifier / inverter dual-function transmitter, the second air circuit breaker, the fuse, the first AC transformer, and the first air circuit breaker in sequence; the transformer branch includes the third air circuit breaker, the second AC transformer, and the fourth air circuit breaker; the AC transformer is a three-phase AC transformer. Phase AC transformer; the transformer branch is composed of 11KV-690V transformer branch and 690V-230V transformer branch; the load branch is composed of 690V load branch and 230V load branch; the emergency charging branch is composed of 690V emergency charging branch and 230V emergency transformer charging branch; the motor group and shore power in the power supply branch are connected through the first inverter, the fifth air circuit breaker and the 11KV main distribution board; the propulsion branch is connected in sequence to the sixth air circuit breaker, the third AC transformer, the second inverter, and the propeller, and the main distribution board consists of 11KV main distribution board, 690V main distribution board, 2 The 30V main distribution board is composed of a plurality of AC distribution board buses separated by a bus tie circuit breaker; the 11KV main distribution board is powered by A diesel generator sets, and is connected to B driving branches, C charging and discharging branches, and D transformer branches below; the 690V main distribution board is separated by E AC distribution board buses through a bus tie circuit breaker; the 690V main distribution board is connected to F load branches, G emergency charging branches, and H transformer branches below; the 230V main distribution board is separated by I AC distribution board buses through a bus tie circuit breaker; the 230V main distribution board is connected to J load branches; K emergency transformer charging branches are connected under the emergency distribution board; the emergency charging branch under the 690V main distribution board includes the seventh air circuit breaker, and the emergency branch is divided into L branches, which are separated by the bus tie circuit breaker in the AC distribution board bus to maintain emergency power supply when a section of the AC distribution board bus fails; there are M emergency charging branches on the 230V main distribution board, which are led out from the 690V main distribution board, including the eighth air circuit breaker, the fourth AC transformer, and the ninth air circuit breaker, which are separated by the bus tie circuit breaker during convergence to ensure stable operation of the system; the number of the battery packs is N.

4. The oil-electric hybrid drive system according to claim 2, characterized in that: The bus tie circuit breaker of the 11KV main distribution board is a normally closed switch; the bus tie circuit breaker of the 690V main distribution board is a normally open switch; and the bus tie circuit breaker of the 230V main distribution board is a normally open switch.

5. A hybrid wind power installation vessel with energy matching function, comprising a dynamic positioning system and a hull, characterized in that: The dynamic positioning system and the hull are powered by a hybrid drive system according to any one of claims 1 to 4, the dynamic positioning system comprising sensors and thrusters; the sensors comprising position sensors, wind sensors, and water flow velocity sensors; the dynamic positioning system transmits ambient environmental signals to the hybrid drive system by installing the position sensors, wind sensors, and water flow velocity sensors on the hull, and the hybrid drive system controls relevant circuits according to the signals from the sensors to adjust the number of thrusters opened, the rotation speed, and the direction angle to ensure that the hull is always in a preset position.

6. A hybrid wind power installation vessel with energy matching function according to claim 5, characterized in that: The offshore wind power installation vessel also includes pile legs and lifting and fixing piles, the pile legs are powered by an oil-electric hybrid drive system as described in claims 1-4 to control the lifting and lowering of the pile legs; the pile legs and the lifting and fixing piles are fixed on the hull, the racks on the pile legs are meshed with the gears on the lifting and fixing piles, and the pile legs are symmetrically distributed on the deck along the bow direction.

7. A hybrid wind power installation vessel with energy matching function according to claim 5, characterized in that: The propeller comprises a rotary propeller, a bow thruster and a retractable propeller; the bow thruster is located at the bow; the retractable propeller is located in the middle of the ship; and the rotary propeller is located at the stern.

8. A hybrid wind power installation vessel with energy matching function according to claim 7, characterized in that: The number of the bow thrusters is O, which can rotate forward and reverse, corresponding to the bow running in different directions; the number of the retractable thrusters is P, which can assist in operation when the resistance is large and can be retracted when the resistance is not large; the number of the rotary thrusters is Q, and the rotation angle is R°.

9. A hybrid wind power installation vessel with energy matching function according to claim 6, characterized in that: The offshore wind power installation vessel also includes a lifting mechanism; the lifting mechanism includes a crane turntable and a crane, and the operation of the crane and the rotation of the crane turntable are controlled by a hybrid drive system according to claims 1-4; the crane turntable is connected to the crane; the number of the cranes is S, which are installed on the crane turntable and can rotate by an angle of T degrees; the length, width and height ratio of the hull is approximately U:V:W; the ratio of the hull length to the pile leg length is approximately X:Y; the ratio of the hull length to the crane length is approximately a:b.

10. The hybrid wind power installation vessel with energy matching function according to claim 5, characterized in that: It comprises a superstructure, which includes a generator room, a helicopter platform and column-type cargo; the number of the column-type cargo is c, which are installed on the hull.

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