Recovery energy storage system based on ship generator load test

Abstract

The utility model discloses a recovery energy storage system for a ship generator load test, which relates to the field of ship-borne generator set load test, and comprises a ship power supply, an energy storage unit and a grid-connected system, and the energy storage unit comprises a first energy storage system and a second energy storage system. According to the utility model, through the arrangement of the hybrid energy storage system, when a generator load test is carried out in the ship construction process, the power generation energy can be effectively stored and reused, off-grid operation can be carried out to independently supply power to a part of loads, and the scheme that the stored energy is directly connected to the existing power distribution and utilization system can also be realized without mode switching. And interconnection and independent operation mode switching between the two groups of energy storage systems are realized, so that higher flexibility is realized, the test cost is reduced, and the system is more low-carbon and environment-friendly.

Description

Technical Field

[0001] The utility model relates to the field of shipboard generator set load test, in particular to a recovery energy storage system used for ship generator load test. Background Art

[0002] In the production process of ships, mooring tests are carried out after the installation of electromechanical equipment and its systems. Through the adjustment and performance test of electromechanical equipment, it is verified whether the electromechanical equipment has reached the original design performance and whether it meets the various requirements stipulated in the ship design, ship inspection regulations and mooring test outline. The load test of the generator set is an extremely important link.

[0003] In previous shipboard generator load tests, the power generated by the shipboard generator was mostly connected from the ship to the load facility wiring board on the shore through low-voltage cable splicing. The load facility is usually a load device composed of a water resistance load cylinder and a reactor. Although such a load is simple in structure, it also has obvious disadvantages: the existing shipboard generator load test requires the splicing of low-voltage cables, resulting in a large number of low-voltage cables on site, a large construction workload, and high cable costs. At the same time, the dry load box or water resistance load cylinder is used as an energy consumption load, which fails to fully reuse the generator's electricity and is not low-carbon and environmentally friendly. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] Therefore, the problem to be solved by the utility model is how to simplify the load test of the shipboard generator set and fully reuse the electric energy of the generator to improve environmental protection.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a recovery energy storage system for ship generator load test, comprising a ship power supply, an energy storage unit, and a grid-connected unit;

[0007] The energy storage unit includes a first energy storage system and a second energy storage system, and the output ends of the first energy storage system and the second energy storage system are connected to the ship power supply and the grid-connected unit respectively.

[0008] A switch component is disposed on one side of the first energy storage system and the second energy storage system. The output end of the switch component is electrically connected to a conversion component, and the output end of the conversion component is connected in parallel to an energy storage component.

[0009] The switch element comprises a first dual power switch electrically connected to the ship power supply, and one side of the first dual power switch is electrically connected to a second dual power switch.

[0010] As a preferred solution of the recovery energy storage system for ship generator load test described in the utility model, wherein: the first dual power switch includes a first switch node - and a second switch node -, and the second dual power switch includes a third switch node - and a fourth switch node -.

[0011] As a preferred solution of the energy recovery storage system for ship generator load test according to the utility model, the first switch node is electrically connected to the third switch node, and the second switch node is electrically connected to the fourth switch node.

[0012] As a preferred solution of the energy recovery storage system for ship generator load test described in the utility model, wherein: the conversion component includes a stabilization module and a bidirectional switch, and the stabilization module is connected in parallel with the second dual power switch.

[0013] As a preferred solution of the recovery energy storage system for ship generator load test described in the utility model, the stabilization module includes a reactor-and a reactive compensation cabinet combination module-, and the reactor-is electrically connected to the reactive compensation cabinet combination module-.

[0014] As a preferred solution of the energy recovery storage system for ship generator load test described in the utility model, the two ends of the bidirectional switch are electrically connected to the reactor and the reactive compensation cabinet combination module respectively.

[0015] As a preferred solution of the energy recovery storage system for ship generator load test described in the utility model, one output end of the bidirectional switch is electrically connected to an inverter, and the output end electrical box of the inverter is connected to an energy storage power supply station.

[0016] As a preferred solution of the energy storage recovery system for ship generator load test according to the utility model, wherein: the ship power supply is communicatively connected with a local data server;

[0017] The energy storage power supply station is communicatively connected with a local data server.

[0018] As a preferred solution of the energy storage recovery system for ship generator load testing described in the utility model, the fourth dual power conversion switch is electrically connected to the first current stabilization module through the eighth switch node, the first current stabilization module is composed of a first reactor and a first reactive compensation cabinet, the first current stabilization module is connected in parallel with a first bidirectional switch, the first bidirectional switch is opened and electrically connected to the first bidirectional inverter after the current is stable, and the first bidirectional inverter is electrically connected to the first hybrid energy storage power station for charging.

[0019] As a preferred solution of the energy recovery storage system for ship generator load test according to the utility model, in which: under the energy storage supply state:

[0020] The second dual power conversion switch is disconnected, the second hybrid energy storage power station is electrically connected to the second bidirectional inverter, the second bidirectional inverter is electrically connected to the second bidirectional switch, and the second bidirectional switch is opened and electrically connected to the second current stabilization module after the current stabilizes; the second current stabilization module is electrically connected to the third dual power conversion switch.

[0021] As a preferred solution of the recovery and storage energy system for ship generator load testing described in the utility model, the fifth switch node on the third dual power conversion switch is closed and passed, and the current then passes through the first switch node on the first dual power conversion switch and enters the grid-connected system for power supply.

[0022] As a preferred solution of the recovery energy storage system for ship generator load testing described in the utility model, wherein: the first hybrid energy storage power supply station is electrically connected to the first bidirectional inverter, the first bidirectional inverter is electrically connected to the first bidirectional switch, the first bidirectional switch is opened after the current is stable and is electrically connected to the first current stabilization module; the first current stabilization module is electrically connected to the fourth dual power conversion switch.

[0023] As a preferred solution of the recovery and storage energy system for ship generator load testing described in the utility model, the seventh switch node on the fourth dual power conversion switch is closed and passed, and the current then passes through the second switch node on the first dual power conversion switch and enters the grid-connected system for power supply.

[0024] As a preferred solution of the energy storage recovery system for ship generator load test according to the utility model, wherein: the first hybrid energy storage power supply station and the second hybrid energy storage power supply station are both connected to the local data server for communication;

[0025] The ship power supply is communicatively connected with a local data server.

[0026] The utility model has the beneficial effects of a recovery energy storage system for ship generator load test: through the setting of the hybrid energy storage system, during the generator load test in the ship construction process, the generated energy can be effectively stored and reused, and it can be operated off-grid to supply power to part of the load separately, and it can also realize the solution of directly connecting the energy storage to the existing power distribution system without mode switching. And the interconnection between the two groups of energy storage systems and the switching of independent operation modes, etc., so as to have higher flexibility, reduce the test cost, and be more low-carbon and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0028] Figure 1 A schematic diagram of the structure of a recovery energy storage system for ship generator load testing according to an embodiment of the present utility model;

[0029] Figure 2 A schematic diagram of the flow structure of a recovery energy storage system for ship generator load testing according to an embodiment of the present utility model;

[0030] Figure 3 A schematic diagram of the flow structure of a recovery energy storage system for a ship generator load test according to an embodiment of the present utility model;

[0031] Figure 4 A schematic diagram of the flow structure of a recovery energy storage system for a ship generator load test according to an embodiment of the present utility model;

[0032] Figure 5 A schematic diagram of the structure of a switch component in a recovery energy storage system for a ship generator load test according to an embodiment of the present utility model;

[0033] Figure 6 A schematic diagram of the structure of a conversion component in a recovery energy storage system for a ship generator load test according to an embodiment of the present utility model;

[0034] Figure 7 A schematic diagram of the structure of energy storage components in a recovery energy storage system for ship generator load testing according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0037] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0038] Secondly, the "one embodiment" or "embodiment" referred to herein refers to a specific feature, structure or characteristic that can be included in at least one implementation of the utility model. The "in one embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0039] Example 1

[0040] Reference Figure 1 and 2 , this embodiment provides a recovery energy storage system for ship generator load testing.

[0041] A recovery energy storage system for ship generator load testing includes a ship power supply 100, an energy storage unit 200, and a grid-connected system 300. The energy storage unit 200 includes a first energy storage system 201 and a second energy storage system 202.

[0042] The second switch node a2 is disconnected from the third switch node b1, and the output end of the ship power supply 100 is electrically connected to the second dual power conversion switch B, and the second dual power conversion switch B is electrically connected to the fourth dual power conversion switch D through the fourth switch node b2;

[0043] The fourth dual power conversion switch D is electrically connected to the first current stabilization module K1 through the eighth switch node d2. The first current stabilization module K1 is composed of a first inductor and a first reactive compensation cabinet. The first current stabilization module K1 is connected in parallel with a first bidirectional switch E1. After the current of the first bidirectional switch E1 is stabilized, it is opened and electrically connected to the first bidirectional inverter F1. The first bidirectional inverter F1 is electrically connected to the first hybrid energy storage power station H1 for charging.

[0044] The second energy storage system 202 includes a second hybrid energy storage power station H2, the second hybrid energy storage power station H2 is electrically connected to the second bidirectional inverter F2, the second bidirectional inverter F2 is electrically connected to the second bidirectional switch E2, the second bidirectional switch E2 is opened after the current is stable and is electrically connected to the second current stabilization module K2; the second current stabilization module K2 is electrically connected to the third dual power conversion switch C;

[0045] The fifth switch node c1 on the third dual power conversion switch C is closed and passed, and the current then passes through the first switch node a1 on the first dual power conversion switch A and enters the grid-connected system 300 for power supply.

[0046] When charging and supply are separated S1: the ship power supply 100 charges the first energy storage system 201, and the second energy storage system 202 supplies power to the grid-connected system 300:

[0047] The first energy storage system 201 is used for ship power generation load, and the second energy storage system 202 is used for grid-connected power transmission. For the first group of hybrid energy storage systems, the hybrid energy storage system is used for ship power generation load at this time. The electricity generated by the ship power supply end is closed through the fourth switch node b2 on the second dual power conversion switch B, and the current is connected to the eighth switch node d2 on the fourth dual power conversion switch D. After the current is stabilized by the anti-shock current regulation of the first current stabilization module K1, the first bidirectional switch E1 is closed again, and the stable current is converted to the first bidirectional switch E1, and connected to the first bidirectional inverter F1, and the current is set and converted from AC to DC. After being converted into DC, the current is connected to the first hybrid energy storage power station H1, and the integrated control cabinet is charged in an orderly manner according to the set charging strategy. At this time, the third switch node b1 on the second dual power conversion switch B and the seventh switch node d1 on the fourth dual power conversion switch D are disconnected, and the first energy storage system 201 is off-grid, and is charged as a ship power generation load.

[0048] For the second energy storage system 202, at this time, the hybrid energy storage system is used for grid-connected power transmission, the third switch node b1 on the second dual power conversion switch B is disconnected, and the second energy storage system 202 has no connection with the second dual power conversion switch B. The second hybrid energy storage power station H2 discharges, and the current is inverted from DC to AC through the second bidirectional inverter F2. The second bidirectional switch E2 is closed and connected, and the current can pass. The second current stabilization module K2 can perform reactive power compensation on the current, and the power quality requirements for grid connection have been met. The current passes through the fifth switch node c1 on the third dual power conversion switch C, and the sixth switch node c2 is in a forced disconnection state. The current then passes through the first joint point a1 on the first dual power conversion switch A, and is connected to the grid connection point. This is the process of grid-connected power transmission of the energy storage system. At this time, the sixth switch node c2 on the third dual power conversion switch C and the second switch node a2 on the first dual power conversion switch A are disconnected, and the second energy storage system 202 is grid-connected.

[0049] The two sets of hybrid energy storage systems operate independently without affecting each other.

[0050] Example 2

[0051] Reference Figure 3 , which is the second embodiment of the utility model, and is different from the first embodiment in that: the first dual power conversion switch A is disconnected, and the output end of the ship power supply 100 is electrically connected to the second dual power conversion switch B, and the second dual power conversion switch B is electrically connected to the third dual power conversion switch C and the fourth dual power conversion switch D through the third switch node b1 and the fourth switch node b2 respectively;

[0052] The third dual power conversion switch C is electrically connected to the second current stabilization module K2 through the sixth switch node c2. The second current stabilization module K2 is composed of a second inductor and a second reactive compensation cabinet. The second current stabilization module K2 is connected in parallel with a second bidirectional switch E2. After the current of the second bidirectional switch E2 is stabilized, it is opened and electrically connected to the second bidirectional inverter F2. The second bidirectional inverter F2 is electrically connected to the second hybrid energy storage power station H2 for charging.

[0053] The fourth dual power conversion switch D is electrically connected to the first current stabilization module K1 through the eighth switch node d2. The first current stabilization module K1 is composed of a first inductor and a first reactive compensation cabinet. The first current stabilization module K1 is connected in parallel with a first bidirectional switch E1. After the current of the first bidirectional switch E1 is stabilized, it is opened and electrically connected to the first bidirectional inverter F1. The first bidirectional inverter F1 is electrically connected to the first hybrid energy storage power station H1 for charging.

[0054] When the ship is charging S2: the ship power supply 100 charges the first energy storage system 201 and the second energy storage system 202 respectively:

[0055] For the first energy storage system 201, the electricity generated by the ship is closed through the fourth switch node b2 on the second dual power conversion switch B, and the current is connected to the eighth switch node d2 on the fourth dual power conversion switch D. After the current is stabilized by the anti-shock current regulation of the first current stabilization module K1, the first bidirectional switch E1 is closed again, and the stable current is converted to the first bidirectional switch E1 and connected to the first bidirectional inverter F1, and the current is set and converted from AC to DC. After being converted into DC, the current is connected to the first hybrid energy storage power station H1, and the integrated control cabinet performs orderly charging according to the set charging strategy. At this time, the seventh switch node d1 on the fourth dual power conversion switch D is forced to disconnect, and the first energy storage system 201 is off-grid.

[0056] For the second energy storage system 202, the electricity generated by the ship end, the third switch node b1 on the second dual power conversion switch B is closed, and the current is connected to the sixth switch node c2 on the third dual power conversion switch C. After the current is stabilized by the anti-shock current regulation of the second current stabilization module K2, the second bidirectional switch E2 is closed again, and the stable current is transferred to the second bidirectional switch E2, and connected to the second bidirectional inverter F2, and the current is set to be converted from AC to DC. After being converted into DC, the current is connected to the second hybrid energy storage power station H2, and the integrated control cabinet is charged in an orderly manner according to the set charging strategy. At this time, the fifth switch node c1 on the third dual power conversion switch C is forced to be disconnected, and the second energy storage system 202 is off-grid.

[0057] Example 3

[0058] Reference Figure 4 , which is the third embodiment of the utility model, which is different from the previous two embodiments in that: the second dual power conversion switch B is disconnected, the second hybrid energy storage power station H2 is electrically connected to the second bidirectional inverter F2, the second bidirectional inverter F2 is electrically connected to the second bidirectional switch E2, and the second bidirectional switch E2 is opened and electrically connected to the second current stabilization module K2 after the current is stabilized; the second current stabilization module K2 is electrically connected to the third dual power conversion switch C.

[0059] The fifth switch node c1 on the third dual power conversion switch C is closed and passed, and the current then passes through the first switch node a1 on the first dual power conversion switch A and enters the grid-connected system 300 for power supply.

[0060] The first hybrid energy storage power station H1 is electrically connected to the first bidirectional inverter F1, the first bidirectional inverter F1 is electrically connected to the first bidirectional switch E1, and the first bidirectional switch E1 is opened and electrically connected to the first current stabilization module K1 after the current stabilizes; the first current stabilization module K1 is electrically connected to the fourth dual power conversion switch D.

[0061] The seventh switch node d1 on the fourth dual power conversion switch D is closed and passed, and the current is then closed and passed through the second switch node a2 on the first dual power conversion switch A, and enters the grid-connected system 300 for power supply.

[0062] The first hybrid energy storage power supply station H1 and the second hybrid energy storage power supply station H2 are both connected to the local data server for communication, and the ship power supply 100 is connected to the local data server for communication.

[0063] When the energy storage is supplying energy S3: the first energy storage system 201 and the second energy storage system 202 both supply power to the grid-connected system 300:

[0064] For the first energy storage system 201, the ship does not generate electricity, the third switch node b1 and the fourth switch node b2 on the second dual power conversion switch B are all disconnected, the first hybrid energy storage power station H1 is discharged, the current is inverted from DC to AC through the first bidirectional inverter F1, the first bidirectional switch E1 is closed and connected, the current can pass, the first current stabilization module K1 can perform reactive power compensation on the current, and the power quality requirements of the grid connection have been met. The current passes through the seventh switch node d1 on the fourth dual power conversion switch D, and the eighth switch node d2 is in a forced disconnection state. The current then passes through the second switch node a2 on the first dual power conversion switch A, and is connected to the grid connection point. This is the grid-connected power transmission process of the energy storage system. At this time, the sixth switch node c2 on the third dual power conversion switch C and the eighth switch node d2 on the fourth dual power conversion switch D are forced to be disconnected, and the first energy storage system 201 is in grid-connected operation.

[0065] For the second energy storage system 202, the ship does not generate electricity, the third switch node b1 and the fourth switch node b2 on the second dual power conversion switch B are all disconnected, the second hybrid energy storage power station H2 is discharged, the current is inverted from DC to AC through the second bidirectional inverter F2, the second bidirectional switch E2 is closed and connected, the current can pass, the second current stabilization module K2 can perform reactive compensation on the current, and the power quality requirements of the grid connection have been met. The current passes through the fifth switch node c1 on the third dual power conversion switch C, and the sixth switch node c2 is in a forced disconnection state. The current then passes through the first switch node a1 on the first dual power conversion switch A, and is connected to the grid connection point. This is the grid-connected power transmission process of the energy storage system. At this time, the sixth switch node c2 on the third dual power conversion switch C and the eighth switch node d2 on the fourth dual power conversion switch D are forced to be disconnected, and the second energy storage system 202 is in grid-connected operation.

[0066] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and ratio of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also an equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0067] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0068] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but for those of ordinary skill having the benefit of this disclosure, without undue experimentation, the development effort will be a routine task of design, fabrication, and production.

[0069] 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 preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A recovery energy storage system for ship generator load test, characterized in that: include, A ship power supply (100), an energy storage unit (200), and a grid connection unit (300); The energy storage unit (200) comprises a first energy storage system (201) and a second energy storage system (202), and output ends of the first energy storage system (201) and the second energy storage system (202) are respectively connected to the ship power supply (100) and the grid-connected unit (300); A switch component (203) is provided on one side of each of the first energy storage system (201) and the second energy storage system (202); an output end of the switch component (203) is electrically connected to a conversion component (204); and an energy storage component (205) is connected in parallel to an output end of the conversion component (204); The switch component (203) comprises a first dual power switch (203a) electrically connected to the ship power supply (100), and one side of the first dual power switch (203a) is electrically connected to a second dual power switch (203b).

2. The energy recovery storage system for ship generator load test according to claim 1 is characterized in that: The first dual power switch (203a) includes a first switch node (203a-1) and a second switch node (203a-2), and the second dual power switch (203b) includes a third switch node (203b-1) and a fourth switch node (203b-2).

3. The energy recovery storage system for ship generator load test according to claim 2 is characterized in that: The first switch node (203a-1) is electrically connected to the third switch node (203b-1), and the second switch node (203a-2) is electrically connected to the fourth switch node (203b-2).

4. The energy recovery storage system for ship generator load test according to claim 3 is characterized in that: The conversion element (204) comprises a stabilizing module (204a) and a bidirectional switch (204b), and the stabilizing module (204a) is connected in parallel with the second dual power switch (203b).

5. The energy recovery storage system for ship generator load test according to claim 4 is characterized in that: The stabilization module (204a) comprises a reactor (204a-1) and a reactive power compensation cabinet combination module (204a-2), and the reactor (204a-1) is electrically connected to the reactive power compensation cabinet combination module (204a-2).

6. The energy recovery storage system for ship generator load test according to claim 5 is characterized in that: The two ends of the bidirectional switch (204b) are electrically connected to the reactor (204a-1) and the reactive power compensation cabinet combination module (204a-2) respectively.

7. The energy recovery storage system for ship generator load test according to claim 6 is characterized in that: One output end of the bidirectional switch (204b) is electrically connected to an inverter (205a), and the output end electrical box of the inverter (205a) is connected to an energy storage power supply station (205b).

8. The energy recovery storage system for ship generator load test according to claim 7 is characterized in that: The ship power supply (100) is communicatively connected with a local data server; The energy storage power supply station (205b) is communicatively connected to a local data server.

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