A power system for offshore wind power installation crane

Abstract

An embodiment of the utility model discloses an electric power system applied to an offshore wind power installation crane vessel. The electric power system applied to an offshore wind power installation crane vessel of the utility model comprises: at least three groups of power components; the power components of each group comprise: a generator set, a primary distribution board and a power unit; in the power components of each group, the generator set, the primary distribution board and the power unit are connected in sequence; in all the power components, the primary distribution board is connected in series in sequence in a ring shape. In the electric power system applied to an offshore wind power installation crane vessel of the utility model, the primary distribution board is connected in a ring shape. When a single fault occurs in the primary distribution board, it does not affect the normal use of other primary distribution boards, thereby improving the safety and reliability of the system and making the load more balanced, which is conducive to improving the economy of the entire power system.

Description

Technical Field

[0001] The utility model relates to the field of shipboard power systems, and in particular to a power system used in a crane ship for installing offshore wind power. Background Art

[0002] With the rapid development of offshore wind power, new orders for large wind power installation crane vessels are coming one after another. Looking at the large-scale development trend of crane vessels, with the increase of lifting capacity, the increase of main ship dimensions and the deepening of operating waters, the requirements of operating sea conditions for dynamic positioning are becoming more and more apparent. These combined factors determine the exponential increase of power station capacity, so that the onboard power system rises to the medium voltage level. Despite this, the main change in the power system is still that with the increase in the number of thrusters, both the number of main switchboards and the number of busbar sections increase linearly.

[0003] These main switchboards or busbars are basically connected in a single line in the form of a "single". This form is not conducive to the unified management of the power station. Once a fault occurs, especially when some of the intermediate busbars or switchboards fail for some reason, other busbars or switchboards are divided into independent ones, which will affect the centralized allocation of power resources of the entire ship and even endanger the safety of the ship during the secondary dynamic positioning operation. In addition, it often presents the characteristics of a large number of generators put into operation, a low single-machine load rate, and an overall low economy. Summary of the invention

[0004] The embodiment of the utility model provides an electric power system applied to an offshore wind power installation crane ship, wherein a primary distribution board is combined and arranged in a ring shape, thereby improving the safety and economy of the electric power system.

[0005] The utility model provides an electric power system for an offshore wind power installation crane ship, comprising: at least three groups of power components;

[0006] The power assembly of each group includes: a generator set, a primary switchboard and a power unit;

[0007] In the power assembly of each group, the generator set, the primary switchboard and the power unit are connected in sequence;

[0008] In all the power components, the primary distribution boards are connected in series in a ring shape.

[0009] In a feasible solution, the power unit includes: a tail thruster unit and a bow thruster unit, and they are respectively connected to the primary distribution board of the same group.

[0010] In a feasible solution, the tail thruster units are evenly configured in each group of the power components.

[0011] In a feasible solution, the bow thruster unit is evenly configured in each group of the power components.

[0012] In a feasible solution, the tail thruster unit and the bow thruster unit are configured in a one-to-one ratio.

[0013] In a feasible solution, it also includes: a power converter and at least two groups of DC power distribution units;

[0014] A set of the DC power distribution units comprises: a three-winding phase-shifting transformer, a dual three-phase rectifier unit and a common DC busbar connected in sequence;

[0015] The power converter is electrically connected to the three-winding phase-shifting transformer.

[0016] In a feasible solution, it also includes: at least two types of electrical loads and a braking resistor;

[0017] At least two types of the electrical loads and the braking resistor are electrically connected to the common DC busbar respectively.

[0018] In a feasible solution, it also includes: a power battery storage unit and a DC shunt control unit, wherein the power battery storage unit and the DC shunt control unit are connected to the common DC busbar in sequence.

[0019] In a feasible solution, it also includes: 400V distribution board and primary transformer;

[0020] The 400V power distribution board includes a plurality of busbars, each of which is connected in sequence;

[0021] The busbar, the primary transformer and the primary distribution board are arranged in a one-to-one correspondence, and the busbar is electrically connected to the primary distribution board through the primary transformer.

[0022] In a feasible solution, it also includes: an emergency generator set and a 400V emergency distribution board, the emergency generator set is electrically connected to the 400V emergency distribution board, and the 400V emergency distribution board is electrically connected to the two sections of the busbar of the 400V distribution board respectively.

[0023] The beneficial effects achieved by the utility model by adopting the above technical solution are as follows: all primary switchboards are connected in a ring shape, and at the same time, each can remain relatively independent. When any primary switchboard fails, it does not affect the normal use of other primary switchboards, thereby improving the safety and reliability of the shipboard power system; and the load of the entire shipboard power system is more balanced, which is conducive to improving the economy of the power system; in particular, the number of generator sets in use can be dynamically adjusted as needed to make the economy of the entire shipboard power system higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 This is a schematic diagram of the overall structure of the power system used in the offshore wind power installation crane vessel in the embodiment of the utility model;

[0026] Figure 2 Schematic diagram of the power plant distribution for installing a crane vessel for offshore wind power.

[0027] Numbers in the figure:

[0028] 1. Generator set; 2. Primary distribution board; 3. Tail thruster unit; 4. Bow thruster unit; 5. Power converter; 6. Three-winding phase-shifting transformer; 7. Dual three-phase rectifier unit; 8. Common DC busbar; 9. Braking resistor; 10. Power load; 11. Power battery storage unit; 12. DC shunt control unit; 13. 400V distribution board; 14. 400V-230V transformer; 15. 230V distribution board; 16. Emergency generator; 17. 400V emergency distribution board; 18. 230V emergency distribution board; 19. General charge and discharge board; 20. Parked generator; 21. External power supply junction box; 22. Primary transformer; 100. Power component; 200. DC distribution unit. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The technical solution of the present utility model is described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0032] like Figure 1 and Figure 2 As shown, the power system provided by the present invention for offshore wind power installation crane vessel comprises: at least three groups of power components 100. Generally speaking, the power components 100 are often set to three groups, and too many groups will reduce the economy of the entire power system.

[0033] Among them, Figure 1 As shown, each power assembly 100 includes: a generator set 1, a primary switchboard 2 and a power unit. The generator set 1 is provided with a neutral point grounding resistor for safety protection. The primary switchboard is mostly a medium voltage switchboard, and the voltage is usually 6.6KV.

[0034] In each power assembly 100, the generator set 1, the primary switchboard 2 and the power unit are connected in sequence. The power unit is used to provide power to the ship, such as a propeller located at the stern of the ship.

[0035] In all power components 100, the primary switchboards 2 are connected in series in a ring shape. Figure 1 In the figure, three primary distribution boards 2 are connected in sequence from left to right, and then the primary distribution board 2 at the rightmost end is electrically connected to the primary distribution board 2 at the leftmost end to form a ring.

[0036] In a feasible solution, the power unit includes: a tail thruster unit 3 and a bow thruster unit 4, and they are respectively connected to the primary switchboard 2 of the same group. A tail thruster unit is an azimuth thruster arranged at the tail of the ship. A bow thruster is a tunnel-type lateral thruster or a telescopic azimuth thruster arranged at the bow of the ship.

[0037] In a feasible solution, the tail propeller units 3 are evenly arranged in each group of power components 100. The so-called evenly arranged means that the tail propellers 3 are evenly distributed on each primary switchboard 2 according to the power size. Figure 1 and Figure 2 As shown in , the tail thruster 3 includes T4, T5, and T6 which are respectively arranged on the primary distribution board 2. Figure 2 In the figure, DG1 to DG6 refer to the generator sets, which are usually three-phase diesel generator sets; MSB1 to MSB3 refer to the primary distribution boards, which are usually 3×6.6KV-50Hz distribution boards.

[0038] This technical solution is adopted to ensure that the loads of each primary switchboard 2 are uniform when the tail thruster 3 is working.

[0039] In a feasible solution, the bow thruster unit 4 is evenly configured in each group of power components 100. Figure 1 and Figure 2 As shown in , the bow thruster unit 4 includes T1, T2, and T3, which are respectively arranged on the primary switchboard 2. This technical solution is adopted to make the load of each primary switchboard 2 uniform when the bow thruster unit 4 is working.

[0040] In a feasible solution, the tail thruster unit 4 and the bow thruster unit 3 are arranged in a one-to-one ratio. Figure 1 In the embodiment, the tail thruster unit 4 and the bow thruster unit 3 maintain the same number and are evenly distributed on each primary switchboard 2. This technical solution is adopted to make the load of each primary switchboard 2 uniform when the bow thruster unit 4 and the tail thruster unit 4 work at the same time.

[0041] In a feasible solution, it further includes: a power converter 5 and at least two groups of DC distribution units 200 .

[0042] A group of the DC power distribution units 200 comprises: a three-winding phase-shifting transformer 6, a dual three-phase rectifier unit 7 and a common DC busbar 8 connected in sequence. The common DC busbars 8 between the DC power distribution units of each group are connected in sequence, and the connection method can be a DC busbar switch.

[0043] One end of the power converter 5 is electrically connected to the primary distribution board 2, and the other end is electrically connected to the three-winding phase-shifting transformer 6. The common DC bus 8 is used to provide power to other loads, and the power converter 5 is used to select a preset number of primary distribution boards 2 from multiple primary distribution boards 2 to provide power to the three-winding phase-shifting transformer 6. In this embodiment, Figure 1 As shown, the power converter 5 is a "three-input and two-output" power converter, that is, it maintains a connection relationship with three primary distribution boards 2, and selects two of the primary distribution boards 2 to be connected to the power converter 5. Figure 1 The three-winding phase-shifting transformer 6 is connected.

[0044] By adopting this technical solution, the redundancy of power supply can be improved.

[0045] In a feasible solution, it further includes: at least two types of electrical loads 10 and a braking resistor 9 .

[0046] It should be noted that the electrical loads 10 here, such as cranes, mooring and positioning winches, etc., share a common DC busbar 8. Conventionally, there are technical barriers (such as physical isolation) between these types of electrical loads 10, and generally each type of electrical load 10 is equipped with a DC distribution unit. In this embodiment, the electrical loads 10 share a common DC busbar 8, which can improve economic efficiency.

[0047] Such electrical loads 10 will provide feedback electric energy to the common DC busbar 8 when working, and the braking resistor 9 can consume the feedback electric energy generated by such electrical loads 10, thereby improving the safety of the power system.

[0048] By adopting this technical solution, the feedback electric energy generated by the electric load 10 can be consumed by the braking resistor 9, thereby protecting the power system and improving the safety of the power system.

[0049] In a feasible solution, it further includes: a power battery storage unit 11 and a DC shunt control unit 12 , wherein the power battery storage unit 11 and the DC shunt control unit 12 are connected to the common DC busbar 8 in sequence.

[0050] The function of the power battery storage unit is to absorb the feedback electric energy generated by the electric load 10 to store the electric energy and improve the effective utilization rate of the energy.

[0051] In a feasible solution, it also includes: a 400V distribution board 13 and a primary transformer 22.

[0052] A possible primary transformer 22 Figure 1 The transformer in the middle is 6.6KV-400V.

[0053] The 400V distribution board 13 is composed of a plurality of busbars connected in sequence.

[0054] The busbars are arranged in one-to-one correspondence with the primary transformer 22 and the primary switchboard 2. Figure 1 There are three primary switchboards 2, three 6.6KV-400V transformers 22, and three buses connected in sequence.

[0055] The busbar is connected to one of the 6.6KV-400V transformers, and the 6.6KV-400V transformer is further connected to a primary distribution board 2.

[0056] The function of the 400V switchboard 13 is to provide 400V power to the ship.

[0057] In a feasible solution, it also includes: an emergency generator set 16 and a 400V emergency switchboard 17. The emergency generator set 16 is electrically connected to the 400V emergency switchboard 17. Figure 1 The 400V distribution board 13 includes three busbars, and the two sections ( Figure 1 The two sections (the leftmost and rightmost sections in the middle) are electrically connected to the busbar to provide two power supplies to the 400V distribution board.

[0058] By adopting this technical solution, two 400V power supplies can be stably provided to the 400V distribution board to ensure the reliability of the power supply.

[0059] In a feasible solution, it also includes: a 230V emergency distribution board 18 and a general charge and discharge board 19. The 230V emergency distribution board 18 is electrically connected to the 400V emergency distribution board 17, and the general charge and discharge board 19 is used to provide a 24V DC power supply.

[0060] In a feasible solution, it also includes: a 400V-230V transformer 14 and a 230V distribution board 15, the 400V distribution board 13 is electrically connected to the 400V-230V transformer 14, and the 230V distribution board 15 is electrically connected to the 400V-230V transformer 14, for providing a 230V power supply.

[0061] In a feasible solution, it also includes: a parking generator 20 for providing power when parking.

[0062] In a feasible solution, it further includes: an external power supply connection box 21 for directly supplying power to the outside.

[0063] The embodiment of the utility model adopts the above scheme, and the beneficial effects achieved are: all the primary distribution boards are connected in a ring shape, and at the same time, each can remain relatively independent. When any primary distribution board fails, it does not affect the normal use of other primary distribution boards, thereby improving the safety and reliability of the shipboard power system; and the load of the entire shipboard power system is more balanced, which is conducive to improving the economy of the power system; in particular, the number of generator sets in use can be dynamically adjusted as needed to make the economy of the entire shipboard power system higher.

[0064] In the present invention, unless otherwise clearly specified and limited, a first feature being “on” or “under” a second feature may mean that the first feature and the second feature are in direct contact, or the first feature and the second feature are in indirect contact via an intermediate medium.

[0065] Moreover, the first feature being “above”, “above”, and “above” the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being “below”, “below”, and “below” the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A power system applied to an offshore wind power installation crane vessel, characterized in that: include: At least three power packs; The power assembly of each group includes: a generator set, a primary switchboard and a power unit; In the power assembly of each group, the generator set, the primary switchboard and the power unit are connected in sequence; In all the power components, the primary distribution boards are connected in series in a ring shape.

2. The power system according to claim 1, characterized in that: The power unit includes: a tail thruster unit and a bow thruster unit, and are respectively connected to the primary distribution board of the same group.

3. The power system according to claim 2, characterized in that: The tail thruster units are evenly distributed in each group of the power components.

4. The power system according to claim 2, characterized in that: The bow thruster unit is evenly configured in each group of the power components.

5. The power system according to claim 3 or 4, characterized in that: The tail thruster unit and the bow thruster unit are configured in a one-to-one ratio.

6. The power system according to claim 5, characterized in that: Also includes: A power converter and at least two sets of DC power distribution units; A set of the DC power distribution units comprises: a three-winding phase-shifting transformer, a dual three-phase rectifier unit and a common DC busbar connected in sequence; The common DC busbars in each group of the DC power distribution units are connected in sequence; The power converter is electrically connected to the three-winding phase-shifting transformer.

7. The power system according to claim 6, characterized in that: Also includes: At least two types of electrical loads and a braking resistor; At least two types of the electrical loads and the braking resistor are electrically connected to the common DC busbar respectively.

8. The power system according to claim 7, characterized in that: Also includes: A power battery storage unit and a DC shunt control unit, wherein the power battery storage unit and the DC shunt control unit are connected to the common DC busbar in sequence.

9. The power system according to claim 8, characterized in that: Also includes: 400V distribution board and primary transformer; The 400V power distribution board includes a plurality of busbars, each of which is connected in sequence; The busbar, the primary transformer and the primary distribution board are arranged in a one-to-one correspondence, and the busbar is electrically connected to the primary distribution board through the primary transformer.

10. The power system according to claim 9, characterized in that: Also includes: An emergency generator set and a 400V emergency distribution board, wherein the emergency generator set is electrically connected to the 400V emergency distribution board, and the 400V emergency distribution board is electrically connected to the two sections of the busbars of the 400V distribution board respectively.

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