Harbor decentralized high-efficiency energy recovery system

Abstract

The present application relates to the technical field of energy storage system, and discloses a port distributed high-efficiency energy recovery system, which comprises a handling crane, a lithium ion capacitor, a chemical battery pack and a power grid system; the handling crane is provided with a first power generation motor; the lithium ion capacitor and the chemical battery pack are electrically connected with the first power generation motor respectively; the lithium ion capacitor is used for power supply in the starting stage of the first power generation motor, recovers the electric quantity generated by the first power generation motor; the chemical battery pack is used for power supply in the operation stage of the first power generation motor, recovers the electric quantity generated by the first power generation motor and stores the surplus electric quantity of a new energy power station; in the lifting state, at least one of the lithium ion capacitor, the chemical battery pack and the new energy power station supplies power to the first power generation motor; in the falling state, the material falls, the first power generation motor generates power and transmits the power to the lithium ion capacitor and the chemical battery pack. The present application can recover the potential energy of the material, reduce the energy consumption of the port and reduce the use cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage systems, in particular to a port distributed high-efficiency energy recovery system. BACKGROUND

[0002] The port is located along the coast of sea, river, lake and reservoir, and has water and land transport equipment and conditions to provide safe access and berthing for ships.

[0003] The construction of low-carbon and zero-carbon ports needs to use clean energy such as wind power and photovoltaic to replace traditional fossil fuels and thermal power plants to achieve zero carbon emissions of port energy use. However, the large-scale access of clean energy poses higher challenges to the stable supply of port energy use, therefore, by establishing energy storage devices to peak shaving and valley filling of clean energy generation, the stability of port energy use is improved, and the energy consumption demand of normal operation of the port is ensured.

[0004] However, the port lifting equipment consumes a lot of electric energy in the process of loading and unloading materials. And the port lifting equipment needs to be frequently turned on and off and forward and reverse, and the port lifting equipment needs a high instantaneous voltage when it is turned on, which further increases the energy consumption of the port, resulting in a high use cost of the port. SUMMARY

[0005] Therefore, the present application provides a port distributed high-efficiency energy recovery system to solve the problems of high energy consumption and high use cost of the port.

[0006] The present application provides a port distributed high-efficiency energy recovery system, comprising:

[0007] The loading and unloading crane is provided with a first power generation motor for loading and unloading materials.

[0008] The lithium ion capacitor and the chemical battery group are electrically connected with the first power generation motor respectively, the lithium ion capacitor is used for power supply in the starting stage of the first power generation motor, and part of the electric quantity generated by the first power generation motor is recovered, and the chemical battery group is used for power supply in the operation stage of the first power generation motor, and part of the electric quantity generated by the first power generation motor and the surplus electric quantity of the new energy power station are stored.

[0009] The loading and unloading crane has a lifting state and a descending state, in the lifting state, at least one of the lithium ion capacitor, the chemical battery group and the new energy power station supplies power to the first power generation motor and drives the loading and unloading crane to lift the materials, in the descending state, the materials rely on the self-weight to fall, drive the first power generation motor to generate electricity and transmit to the lithium ion capacitor and the chemical battery group.

[0010] The power grid system is electrically connected with the lithium ion capacitor, the chemical battery group and the new energy power station respectively to transmit the electric quantity to the electric equipment or the energy storage equipment.

[0011] Beneficial effects: the present application realizes the loading and unloading of materials by the loading and unloading crane. In the lowering state, the potential energy of the materials is converted into electric energy by the first power generation motor and stored in the lithium ion capacitor and the chemical battery pack. In the lifting state, the lithium ion capacitor with high power density is used to provide the starting power of the first power generation motor. After the first power generation motor starts to the rated speed, the chemical battery pack or the new energy power station with low cost is used to supply power for the first power generation motor, thereby reducing the energy consumption of the port and reducing the use cost of the port.

[0012] In an optional embodiment, the chemical battery pack includes a plurality of chemical batteries, the plurality of chemical batteries enter the charging state or the discharging state in turn, each chemical battery is provided with a charging threshold and a discharging threshold, and enters the charging state when the electric quantity reaches the charging threshold and enters the discharging state when the electric quantity reaches the discharging threshold.

[0013] Beneficial effects: since the use frequency of the chemical battery is relatively low, the chemical battery of the present application adopts the full charging and full discharging form, and the plurality of chemical batteries enter the charging state or the discharging state in turn. The chemical battery enters the charging state when the electric quantity reaches the charging threshold and enters the discharging state when the electric quantity reaches the discharging threshold, so as to maximize the use of the chemical battery and prolong the service life of the chemical battery.

[0014] In an optional embodiment, the loading and unloading crane includes:

[0015] The first lifting tool is used for connecting the materials;

[0016] The first drum is electrically connected with the first power generation motor through the first transmission mechanism;

[0017] The first flexible cable is connected with the first lifting tool and the first drum respectively.

[0018] Beneficial effects: in the lifting state, the first power generation motor drives the first drum to rotate forward, and the first drum drives the first lifting tool through the first flexible cable to make the materials rise. In the lowering state, the materials fall by gravity and drive the first drum to rotate reversely through the first flexible cable to drive the first power generation motor to generate electricity, so as to convert the potential energy of the materials into electric energy and store it in the lithium ion capacitor and the chemical battery pack, thereby reducing the use energy consumption.

[0019] In an optional embodiment, the energy storage device includes a potential energy storage power station, the potential energy storage power station is electrically connected with the first power generation motor, and the potential energy storage power station can supply power for the first power generation motor in the lifting state;

[0020] The potential energy storage power station includes:

[0021] The power station body is internally provided with a plurality of storage frames, and the storage frames are used for storing materials;

[0022] A plurality of potential energy cranes are movably arranged on the top of the power station body, and each potential energy crane is provided with a second power generation motor, which is electrically connected with the lithium ion capacitor and the power grid system respectively;

[0023] The potential energy storage power station has a storage state and a power generation state.

[0024] When the potential energy storage power station responds to the power surplus of the new energy power station, the potential energy storage power station enters the storage state.

[0025] When the potential energy storage power station responds to the power deficit of the new energy power station, the potential energy storage power station enters the power generation state.

[0026] Beneficial effects: The three-level storage structure of the port is formed by the lithium ion capacitor, the chemical battery pack and the potential energy storage power station, part of the consumed electric energy of the port can be recycled, and the energy consumption and use cost of the port are further reduced. When the potential energy storage power station responds to the power surplus of the new energy power station, the second power generation motor drives the potential energy crane to lift the material and store it in the storage frame, and the electric energy is converted into the potential energy of the material. When the potential energy storage power station responds to the power deficit of the new energy power station, the material falls to drive the second power generation motor to generate power, and the potential energy of the material is converted into electric energy, and the material is supplied to the loading and unloading crane through the power grid system, so that the peak load shifting of the new energy power station is realized, and the stability of the port power supply is improved. In addition, the storage of the material and the storage of the material are integrated, which can also reduce the occupied space and improve the efficiency of the material transfer.

[0027] In an alternative embodiment, the lithium ion capacitor is provided with at least two groups, one group of lithium ion capacitor is arranged on the loading and unloading crane for recycling the electric energy generated by the first power generation motor in the descending state, and the other group of lithium ion capacitor is arranged in the power station body for recycling the electric energy generated by the second power generation motor in the power generation state, and the electric energy generated by the second power generation motor in the constant speed stage is transmitted to the power utilization equipment through the power grid system.

[0028] Beneficial effects: One group of lithium ion capacitor recycles the electric energy generated by the loading and unloading crane in the descending state, and provides instantaneous power for the start of the first power generation motor. Another group of lithium ion capacitor recycles the electric energy generated by the potential energy crane in the power generation state, and provides instantaneous power for the start of the second power generation motor.

[0029] In an alternative embodiment, each potential energy crane comprises:

[0030] A second lifting device for connecting the material;

[0031] a second winding drum, electrically connected with the second generator motor through a second transmission mechanism;

[0032] a second flexible cable, connecting the second lifting tool and the second winding drum respectively.

[0033] Beneficial effects: in the energy storage state, the second winding drum is driven by the second generator motor to rotate in the positive direction, and the second winding drum drives the second lifting tool to ascend the material through the second flexible cable. In the power generation state, the material falls under its own weight and drives the second winding drum to rotate in the reverse direction through the second flexible cable, so as to drive the second generator motor to generate electricity, convert the potential energy of the material into electrical energy, store it in the lithium ion capacitor, and input it into the power grid system, thereby further reducing the energy consumption of the port.

[0034] In an optional embodiment, each potential energy crane further comprises:

[0035] a cross beam arranged at the top of the power station body;

[0036] a first walking mechanism arranged at both ends of the cross beam, used to drive the cross beam to move along a direction perpendicular to the length direction of the cross beam;

[0037] a second walking mechanism arranged on the cross beam, and the second lifting tool is arranged on the second walking mechanism, and the second walking mechanism can drive the second lifting tool to move along the length direction of the cross beam.

[0038] Beneficial effects: the first walking mechanism can drive the cross beam and the second walking mechanism to move along a direction perpendicular to the length direction of the cross beam to adjust the position of the potential energy crane relative to the whole material, and the second walking mechanism can drive the second lifting tool to move along the length direction of the cross beam to adjust the relative position of the second lifting tool and the material. In addition, the first walking mechanism and the second walking mechanism can also cooperate to extract the material at any position and disassemble the material at any position, which is convenient to use.

[0039] In an optional embodiment, the potential energy storage power station further comprises:

[0040] a plurality of carrying platforms movably arranged in the power station body and corresponding to the storage frames;

[0041] Each carrying platform comprises:

[0042] a first platform arranged in the power station body and capable of moving along a first direction;

[0043] a second platform arranged on the first platform and capable of moving along a second direction, used to carry the material, and the first direction is perpendicular to the second direction;

[0044] The upper end of the second platform is further provided with a jacking mechanism, which is used to lift or drop the material.

[0045] Beneficial effects: the second platform can carry the material extracted by the potential energy crane, and place the material on the storage frame, or take it out from the storage frame. The first platform can move the second platform and the material, so as to transport the material to the idle storage frame, or take it out from the storage frame. The jacking mechanism can lift the material from the storage frame, or lift the material and then drop it onto the storage frame, which is convenient to use.

[0046] In an optional embodiment, the power station body is sequentially provided with an energy storage area, an intermediate area and a storage area from high to low;

[0047] In the energy storage state, the potential energy crane is suitable for bringing the material from the storage area into the energy storage area;

[0048] In the power generation state, the potential energy crane is suitable for bringing the material from the energy storage area into the storage area.

[0049] Beneficial effects: the energy storage area is located at the highest position, and can store a certain amount of potential energy material. The storage area is located at the lowest position, and is used to place the material after releasing the potential energy, so as to take out the material at any time, and also can play a role in timely turnover of the material. The intermediate area is used to separate the energy storage area and the storage area, and to lift the height of the energy storage area.

[0050] In an optional embodiment, a detection module and a control module are further included, the detection module is used to detect the working parameters of the first power generation motor, and the working parameters at least include the voltage parameter of the first power generation motor, and the control module is electrically connected with the detection module, the lithium ion capacitor and the chemical battery group, and is used to receive the working parameter signal of the first power generation motor detected by the detection module;

[0051] The control module controls the lithium ion capacitor and the chemical battery group to enter the charging state based on the working parameter signal, so as to recover the electric quantity generated by the first power generation motor, or controls the lithium ion capacitor and the chemical battery group to enter the discharging state, so as to supply power for the first power generation motor.

[0052] Beneficial effects: the control module can judge the lithium ion capacitor and the chemical battery group to enter the charging state or the discharging state according to the working parameters of the first power generation motor detected by the detection module, so as to realize the rapid automatic scheduling of the electric quantity. BRIEF DESCRIPTION OF DRAWINGS

[0053] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0054] Figure 1A structural schematic view of a port distributed high-efficiency energy recovery system according to an embodiment of the present application;

[0055] Figure 2 A schematic view of a handling crane of a port distributed high-efficiency energy recovery system according to an embodiment of the present application;

[0056] Figure 3 A partial schematic view of a handling crane of a port distributed high-efficiency energy recovery system according to an embodiment of the present application;

[0057] Figure 4 A front view of a potential energy storage power station of a port distributed high-efficiency energy recovery system according to an embodiment of the present application;

[0058] Figure 5 A top view of a potential energy storage power station of a port distributed high-efficiency energy recovery system according to an embodiment of the present application;

[0059] Figure 6 A side view of a potential energy storage power station of a port distributed high-efficiency energy recovery system according to an embodiment of the present application;

[0060] Figure 7 A schematic view of a potential energy crane of a port distributed high-efficiency energy recovery system according to an embodiment of the present application;

[0061] Figure 8 A partial schematic view of a potential energy crane of a port distributed high-efficiency energy recovery system according to an embodiment of the present application;

[0062] Figure 9 Another partial schematic view of a potential energy crane of a port distributed high-efficiency energy recovery system according to an embodiment of the present application;

[0063] Figure 10 A front view of a carrying platform of a port distributed high-efficiency energy recovery system according to an embodiment of the present application;

[0064] Figure 11 A top view of a carrying platform of a port distributed high-efficiency energy recovery system according to an embodiment of the present application;

[0065] Figure 12 A side view of a carrying platform of a port distributed high-efficiency energy recovery system according to an embodiment of the present application.

[0066] Explanation of reference signs:

[0067] 1. Loading and unloading crane; 101. First spreader; 102. First drum; 103. First flexible rope; 2. First generator motor; 3. Lithium-ion capacitor; 4. Chemical battery pack; 5. Potential energy storage power station; 501. Power station body; 5011. Energy storage area; 5012. Middle area; 5013. Storage area; 502. Storage frame; 503. Potential energy crane; 5031. Second spreader; 5032. Second drum; 5033. Second flexible rope; 5034. Second transmission mechanism; 5035. Crossbeam; 5036. First traveling mechanism; 5037. Second traveling mechanism; 504. Second generator motor; 505. Carrying platform; 5051. First platform; 5052. Second platform; 5053. Lifting mechanism; 6. Materials; 7. New energy power station; 8. Truck DETAILED DESCRIPTION

[0068] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0069] To address the problem of frequent startup of port hoisting equipment, resulting in high power consumption and high operating costs, the present invention utilizes a first generator motor in the descent state to convert the potential energy of the material into electrical energy, which is stored in a lithium-ion capacitor and a chemical battery pack. In the lifting state, the high-power-density lithium-ion capacitor is first used to provide the starting power for the first generator motor. After the first generator motor starts to reach the rated speed, the lower-cost chemical battery pack provides power to the first generator motor, thereby reducing the port's energy consumption and lowering the cost of use.

[0070] The following combination Figures 1 to 12 , describing embodiments of the present invention.

[0071] According to an embodiment of the present invention, Figure 1As shown, a port distributed high-efficiency energy recovery system is provided, mainly comprising: a handling crane 1, a lithium ion capacitor 3, a chemical battery group 4 and a power grid system. The handling crane 1 is provided with a first power generation motor 2 for handling materials 6. The lithium ion capacitor 3 and the chemical battery group 4 are electrically connected with the first power generation motor 2, the lithium ion capacitor 3 is used for power supply in the starting stage of the first power generation motor 2 and recovers part of the electric quantity generated by the first power generation motor 2. The chemical battery group 4 is used for power supply in the working stage of the first power generation motor 2 and recovers part of the electric quantity generated by the first power generation motor 2 and stores the surplus electric quantity of a new energy power station 7. The handling crane 1 has a lifting state and a falling state. In the lifting state, at least one of the lithium ion capacitor 3, the chemical battery group 4 and the new energy power station 7 supplies power to the first power generation motor 2 and drives the handling crane 1 to lift the materials 6. In the falling state, the materials 6 fall by gravity, drive the first power generation motor 2 to generate electricity and transmit to the lithium ion capacitor 3 and the chemical battery group 4. The power grid system is electrically connected with the lithium ion capacitor 3, the chemical battery group 4 and the new energy power station 7 respectively to transmit the electric quantity to the power consumption equipment or the energy storage equipment.

[0072] The embodiment of the present application realizes the handling of the materials 6 by the handling crane 1. In the falling state, the potential energy of the materials 6 is converted into electric energy by the first power generation motor 2 and stored in the lithium ion capacitor 3 and the chemical battery group 4. In the lifting state, the lithium ion capacitor 3 with high power density is used to provide the starting power of the first power generation motor 2 first. After the first power generation motor 2 starts to the rated speed, the chemical battery group 4 or the new energy power station 7 supplies power to the first power generation motor 2, thereby reducing the energy consumption of the port and reducing the use cost of the port.

[0073] Specifically, the first power generation motor 2 has a starting stage and a working stage. The starting stage requires a large instantaneous power, so it is supplied by the lithium ion capacitor 3 with high power density. When the first power generation motor 2 enters the working stage, the power requirement is reduced, at which time it can be supplied by the chemical battery group 4 or the new energy power station 7. The lithium ion capacitor 3 has high energy density and power density, so it can meet the requirement of large power use in the starting moment of the first power generation motor 2. The first power generation motor 2 can adopt a power generation and motor integrated machine. The new energy power station 7 is used to supply power to the power consumption equipment of the port, such as a photovoltaic power station using solar power generation, a wind power station using wind power generation, etc.

[0074] In one embodiment, the chemical battery group 4 comprises a plurality of chemical batteries, the plurality of chemical batteries enter the charging state or the discharging state in turn, each chemical battery is provided with a charging threshold and a discharging threshold, and enters the charging state when the electric quantity reaches the charging threshold and enters the discharging state when the electric quantity reaches the discharging threshold.

[0075] Since the number of uses of the chemical battery is relatively less than the number of uses of the lithium-ion capacitor 3, the chemical battery of the embodiment of the present application adopts a full-charge full-discharge form, and the plurality of chemical batteries are sequentially rotated into a charging state or a discharging state. The chemical battery enters the charging state when the electric quantity reaches the charging threshold, and enters the discharging state when the electric quantity reaches the discharging threshold, so as to maximize the use of the chemical battery and prolong the service life of the chemical battery. The use cost of the chemical battery is relatively low, and the use cost can be reduced by adopting the lithium-ion capacitor 3 and the chemical battery group 4 to jointly supply power and recover potential energy.

[0076] It should be noted that the embodiment of the present application does not limit the chemical battery, and any existing structure can be selected as needed.

[0077] In one embodiment, as shown in Figure 2 and Figure 3 , the load handling crane 1 mainly includes a first lifting tool 101, a first drum 102, and a first flexible cable 103. The first lifting tool 101 is used to connect the material 6. The first drum 102 is electrically connected with the first power generation motor 2 through a first transmission mechanism. The first flexible cable 103 is connected with the first lifting tool 101 and the first drum 102 respectively. In the lifting state, the first power generation motor 2 drives the first drum 102 to rotate forward, and the first drum 102 drives the first lifting tool 101 through the first flexible cable 103, so that the material 6 rises. In the descending state, the material 6 falls by relying on the dead weight and drives the first drum 102 to rotate reversely through the first flexible cable 103, so as to drive the first power generation motor 2 to generate electricity, convert the potential energy of the material 6 into electric energy, and store the electric energy in the lithium-ion capacitor 3 and the chemical battery group 4, thereby reducing the use energy consumption.

[0078] Specifically, the first lifting tool 101 is further provided with a spin lock for fastening the material 6. The mass of the first lifting tool 101 is generally 10-20 tons, which also has a certain potential energy. The load handling crane 1 is further provided with a machine room, and the first drum 102, the first power generation motor 2, the lithium-ion capacitor 3, and the chemical battery group 4 can be installed in the machine room. The first flexible cable 103 generally adopts a steel wire rope. The material 6 of the port is generally a container. The first transmission mechanism can adopt a conventional transmission mechanism such as a speed reducer and a shaft coupling.

[0079] It should be noted that the port generally needs four steps to load and unload the material 6 from the ship cabin to the truck 8 on the shore. The first step: the first power generation motor 2 drives the first drum 102 of the load handling crane 1, and drives the material 6 on the ship cabin to rise to a certain height through the first lifting tool 101, and then moves horizontally to above the truck 8. The second step: the first lifting tool 101 drives the material 6 to descend to the truck 8. The third step: the first lifting tool 101 of the load handling crane 1 is unloaded and rises to a certain height and moves horizontally to above the ship cabin. The fourth step: the first lifting tool 101 of the load handling crane 1 is unloaded and descends to the material 6 in the ship cabin.

[0080] Wherein, the first step and the third step need to consume electric energy, the first generator motor 2 drives the first drum 102 as a motor. The second step can convert the potential energy of the first hoist 101 and the material 6 into electric energy and store in the lithium ion capacitor 3 and the chemical battery 4 respectively. The fourth step can convert the potential energy of the first hoist 101 into electric energy and store in the lithium ion capacitor 3 and the chemical battery 4 respectively. In the second step and the fourth step, the first drum 102 is driven by the material to reverse rotation, and the first generator motor 2 generates electric energy as a generator.

[0081] In one embodiment, as shown in Figures 4 to 6 The energy storage device includes a potential energy storage power station 5. The potential energy storage power station 5 is electrically connected with the first generator motor 2, and in the lifting state, the potential energy storage power station 5 can supply power to the first generator motor 2. Therefore, in the lifting state, at least one of the lithium ion capacitor 3, the chemical battery 4, the potential energy storage power station 5 and the new energy power station 7 supplies power to the first generator motor 2.

[0082] Specifically, the potential energy storage power station 5 mainly includes a power station body 501 and a plurality of potential energy cranes 503. The power station body 501 is provided with a plurality of storage frames 502 for storing the material 6. The plurality of potential energy cranes 503 are movably arranged at the top of the power station body 501, and each potential energy crane 503 is provided with a second generator motor 504, which is electrically connected with the lithium ion capacitor 3 and the power grid system respectively.

[0083] The potential energy storage power station 5 has a storage state and a power generation state. In the storage state, the second generator motor 504 drives the potential energy crane 503 to lift the material 6 and store it on the storage frame 502. In the power generation state, the material 6 falls by gravity and drives the second generator motor 504 to generate electricity and transmit to the lithium ion capacitor 3 and the power grid system. The potential energy storage power station 5 enters the storage state in response to the surplus of the new energy power station 7. The potential energy storage power station 5 enters the power generation state in response to the power shortage of the new energy power station 7.

[0084] The lithium ion capacitor 3, the chemical battery pack 4 and the potential energy storage power station 5 form a three-level energy storage structure of the port, and part of the consumed electric energy of the port can be recycled, so that the energy consumption and use cost of the port are further reduced. When the power of the new energy power station 7 is surplus, the potential energy storage power station 5 drives the potential crane 503 to drive the material 6 to rise and store on the storage frame 502 by using the second power generation motor 504, so that the electric energy is converted into the potential energy of the material 6. When the power of the new energy power station 7 is insufficient, the material 6 falls to drive the second power generation motor 504 to generate electricity, and the potential energy of the material 6 is converted into electric energy, and the material 6 is supplied to the power grid system, so that the new energy power station 7 realizes peak clipping and valley filling, and the stability of the power consumption of the port is improved. Similarly, the chemical battery pack 4 can also have the same effect as the potential energy storage power station 5, and when the power of the new energy power station 7 is surplus, the surplus power of the new energy power station 7 is stored, and when the power of the new energy power station 7 is insufficient, the power is output to the power grid system to supply power to the power consumption equipment.

[0085] The potential energy storage power station 5 of the embodiment of the present application integrates the energy storage and storage of the material 6, and can also reduce the occupied space and improve the transfer efficiency of the material 6. The material 6 is generally transported to the potential energy storage power station 5 by a truck 8.

[0086] Specifically, the power station body 501 adopts a closed frame structure, and the height of the storage frame 502 can be selected as needed to consume electric energy and recover potential energy. Each material 6 can be stored on a storage frame 502 individually to avoid mutual extrusion of the materials 6, and the stacking layers of the materials 6 are not limited by the structural strength of the materials 6 themselves. The new energy power station 7 first needs to meet the operation energy consumption of the port. Because the power generation source of the new energy power station 7 is unstable, the power generation is also unstable, and the power is surplus in part of the period, that is, the power generation exceeds the power consumption of the port. The power is insufficient in part of the period, that is, the power generation cannot meet the power consumption of the port.

[0087] It should be noted that the response time of the lithium ion capacitor 3 and the chemical battery pack 4 is millisecond level when responding to the dispatching instruction, the discharge time is minute / hour level, and the capacitor can quickly discharge externally, but the cycle discharge time is limited. The response time of the potential energy storage power station 5 is minute level, the response time is relatively slow, but the potential energy storage power station 5 can stably supply power for a long time, and the service life of the potential energy storage power station 5 is dozens of years, which can realize hour / year month level energy storage, and the discharge power and discharge time of the potential energy storage power station 5 depend on the scale of the power station body 501, and can meet the large-scale power demand.

[0088] Since the continuous time of the container handling crane 1 handling containers is not fixed, in the case of many ships, large ships, and many arriving cargos, the container handling crane 1 needs to work for a long time, and the number of simultaneously working container handling cranes 1 is large. Therefore, long-time and high-power energy supply is required. In the case of small ship tonnage and small handling task amount, the container handling crane 1 only needs to work for a short time. Therefore, the present application can reasonably allocate the working time of the lithium ion capacitor 3, the chemical battery group 4, and the potential energy storage power station 5 according to different work amounts, so as to achieve the highest energy utilization and the smallest cost loss.

[0089] Specifically, when the power of the new energy power station 7 is insufficient, and the handling task amount is large, multiple container handling cranes 1 need to work for a long time at the same time, at which time the potential energy storage power station 5 can be used to directly supply energy to multiple container handling cranes 1 and other electrical equipment in the port. When the handling task amount is small, the chemical battery group 4 is used to supply energy to multiple container handling cranes 1 and other electrical equipment in the port.

[0090] In one embodiment, as shown in Figure 3 and Figure 9 , the lithium ion capacitor 3 is provided in at least two groups. One group of lithium ion capacitors 3 is arranged on the container handling crane 1, which is used to recover part of the power generated by the first power generation motor 2 in the descending state, and provide instantaneous power for the start of the first power generation motor 2 in the lifting state. Another group of lithium ion capacitors 3 is arranged in the power station body 501, which is used to recover the power generated by the second power generation motor 504 in the variable speed stage in the power generation state, and provide instantaneous power for the start of the second power generation motor 504 in the power generation state. The power generated by the second power generation motor 504 in the constant speed stage is transmitted to the electrical equipment through the power grid system.

[0091] Since the second power generation motor 504 also needs to be frequently started and stopped and forward and reverse rotated during operation, the lithium ion capacitor 3 can provide instantaneous power for the start of the first power generation motor 2, which can meet the starting requirements of the second power generation motor 504. In addition, the material 6 needs to go through the processes of acceleration, constant speed, and deceleration in the energy storage state and the power generation state. Among them, the frequency and voltage of the power generated by the second power generation motor 504 are unstable during the acceleration and deceleration of the material 6, and the optimal power generation speed cannot be reached. Therefore, the traditional potential energy storage equipment cannot recover the potential energy in this stage. The embodiment of the present application can store the power generated by the material 6 in the acceleration and deceleration stages in the lithium ion capacitor 3 first, and then transmit the power to the electrical equipment through the power grid system after the speed of the second power generation motor 504 is stable, so as to provide stable power and improve the conversion and utilization rate of potential energy.

[0092] In one embodiment, as shown in Figures 7 to 9As shown, each potential energy crane 503 mainly comprises a second lifting tool 5031, a second drum 5032 and a second flexible cable 5033. The second lifting tool 5031 is used to connect the material 6. The second drum 5032 is electrically connected with the second power generation motor 504 through a second transmission mechanism 5034. The second flexible cable 5033 is connected with the second lifting tool 5031 and the second drum 5032 respectively.

[0093] In the energy storage state, the second power generation motor 504 drives the second drum 5032 to rotate in the positive direction. The second drum 5032 drives the second lifting tool 5031 through the second flexible cable 5033, so that the material 6 rises. In the power generation state, the material 6 falls by relying on the dead weight and drives the second drum 5032 to rotate in the reverse direction through the second flexible cable 5033, so as to drive the second power generation motor 504 to generate electricity. The potential energy of the material 6 is converted into electric energy and stored in the lithium ion capacitor 3, and is input into the power grid system, thereby improving the energy conversion efficiency of the potential energy power station 5.

[0094] Specifically, the second transmission mechanism 5034 comprises a speed reducer. The input end of the speed reducer is connected with the second power generation motor 504 through a shaft coupling, and the output end of the speed reducer is connected with the second drum 5032 through another shaft coupling. The second flexible cable 5033 can adopt a steel wire rope.

[0095] Further, as shown, Figure 7 In one embodiment, each potential energy crane 503 further comprises a cross beam 5035, a first walking mechanism 5036 and a second walking mechanism 5037. The cross beam 5035 is arranged at the top of the power station body 501. The first walking mechanism 5036 is arranged at both ends of the cross beam 5035 and is used to drive the cross beam 5035 to move along a direction perpendicular to the length direction of the cross beam 5035. The second walking mechanism 5037 is arranged on the cross beam 5035, and the second lifting tool 5031 is arranged on the second walking mechanism 5037. The second walking mechanism 5037 can drive the second lifting tool 5031 to move along the length direction of the cross beam 5035.

[0096] The embodiment of the present application can drive the cross beam 5035 and the second walking mechanism 5037 to move along a direction perpendicular to the length direction of the cross beam 5035 by the first walking mechanism 5036, so as to adjust the position of the potential energy crane 503 relative to the whole material 6. The second walking mechanism 5037 can drive the second lifting tool 5031 to move along the length direction of the cross beam 5035, so as to adjust the relative position of the second lifting tool 5031 and the material 6. In addition, the first walking mechanism 5036 and the second walking mechanism 5037 can also cooperate to realize the extraction of the material 6 at any position and the disassembly of the material 6 at any position, which is convenient to use.

[0097] It should be noted that the first walking mechanism 5036 and the second walking mechanism 5037 can adopt any existing structure according to the needs, for example, a self-moving device.

[0098] In one embodiment, as shown in Figure 5 、 Figure 6 、 Figures 10 to 12 The potential energy storage power station 5 further comprises a plurality of carrying platforms 505, which are movably arranged in the power station body 501 and correspondingly arranged with the storage frames 502. Each carrying platform 505 mainly comprises a first platform 5051 and a second platform 5052. The first platform 5051 is arranged in the power station body 501 and can move in a first direction. The second platform 5052 is arranged on the first platform 5051 and can move in a second direction for carrying the material 6, and the first direction is perpendicular to the second direction. The upper end of the second platform 5052 is further provided with a jacking mechanism 5053 for lifting or dropping the material 6.

[0099] The second platform 5052 can carry the material 6 extracted by the potential energy crane 503 and place it on the storage frame 502 or take it out from the storage frame 502. The first platform 5051 can move the second platform 5052 and the material 6 so as to transport the material 6 to the idle storage frame 502 or take it out from the storage frame 502. The jacking mechanism 5053 can lift the material 6 from the storage frame 502 or lift the material 6 and then drop it on the storage frame 502, which is convenient to use.

[0100] When it is needed to take out the material 6 from the storage frame 502, the second platform 5052 first moves to the lower side of the corresponding storage frame 502, and then the jacking mechanism 5053 lifts the material 6, and the second platform 5052 moves to the upper side of the first platform 5051. The first platform 5051 drives the second platform 5052 and the material 6 to move to the lower side of the potential energy crane 503. The second hoist 5031 of the potential energy crane 503 carries the material 6 on the second platform 5052.

[0101] When it is needed to store the material 6 on the storage frame 502, the jacking mechanism 5053 of the second platform 5052 is started in advance to lift the material 6, and then the second platform 5052 moves to the lower side of the corresponding storage frame 502, and finally the jacking mechanism 5053 drops, and the material 6 is stored on the storage frame 502, and the second platform 5052 returns to the upper side of the first platform 5051. The first platform 5051 moves the empty second platform 5052 to the lower side of the potential energy crane 503, and can receive the material 6 carried by the second hoist 5031.

[0102] It should be noted that the first platform 5051 and the second platform 5052 can adopt any existing structure according to needs, for example, a carrying trolley.

[0103] For ease of use, in one embodiment, the moving direction of the first platform 5051 may be consistent with the moving direction of the first traveling mechanism 5036 , and the moving direction of the second platform 5052 may be consistent with the moving direction of the second traveling mechanism 5037 .

[0104] In one embodiment, Figure 4 As shown, the power station body 501 is provided with an energy storage area 5011, an intermediate area 5012 and a storage area 5013 from high to low. In the energy storage state, the potential energy crane 503 is suitable for driving materials 6 from the storage area 5013 into the energy storage area 5011. In the power generation state, the potential energy crane 503 is suitable for driving materials 6 from the energy storage area 5011 into the storage area 5013. The energy storage area 5011 is located at the highest point and can store materials 6 with a certain potential energy. The storage area 5013 is located at the lowest point and is used to place materials 6 after the potential energy is released, so that the materials 6 can be taken out at any time and can also play a role in the timely circulation of materials 6. The intermediate area 5012 is used to isolate the energy storage area 5011 and the storage area 5013 and raise the height of the energy storage area 5011.

[0105] In one embodiment, the port-type distributed high-efficiency energy recovery system further includes a detection module and a control module. The detection module is configured to detect operating parameters of the first generator motor 2, including at least voltage parameters of the first generator motor 2. The control module is electrically connected to the detection module, the lithium-ion capacitor 3, and the chemical battery pack 4, and is configured to receive operating parameter signals of the first generator motor 2 detected by the detection module.

[0106] Based on the working parameter signal, the control module controls the lithium ion capacitor 3 and the chemical battery pack 4 to enter a charging state to recover the electricity generated by the first generator motor 2, or controls the lithium ion capacitor 3 and the chemical battery pack 4 to enter a discharging state to power the first generator motor 2.

[0107] The control module can detect the operating parameters of the first generator motor 2 based on the detection module, determine whether the lithium-ion capacitor 3 and the chemical battery pack 4 are in the charging or discharging state, and realize rapid and automatic power scheduling. In addition, the control module can also have monitoring and protection functions, such as overvoltage and overcurrent self-regulation, main circuit overvoltage and overcurrent protection, temperature control protection, and fire protection functions.

[0108] Specifically, the control module determines whether the first generator motor 2 is in a power generation state or a power consumption state according to the voltage size and direction detected by the detection module. When the first generator motor 2 is in the power generation state, the control module rectifies the electric energy of the first generator motor 2 to the DC bus through the inverter, the DC bus voltage is raised, and the electric energy flows from the DC bus to the lithium-ion capacitor 3 and the chemical battery pack 4. When the first generator motor 2 is in the power consumption state, at least one of the lithium-ion capacitor 3, the chemical battery pack 4, the potential energy storage power station 5, and the new energy power station 7 supplies power to the first generator motor 2.

[0109] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. A port distributed high-efficiency energy recovery system, characterized in that: include: A loading and unloading crane (1) is provided with a first generator motor (2) for loading and unloading materials (6); The lithium ion capacitor (3) and the chemical battery pack (4) are electrically connected to the first generator motor (2), respectively. The lithium ion capacitor (3) is used to supply power to the first generator motor (2) during the startup phase and to recover part of the power generated by the first generator motor (2). The chemical battery pack (4) is used to supply power to the first generator motor (2) during the operation phase and to recover part of the power generated by the first generator motor (2) and to store surplus power of the new energy power station (7). The loading and unloading crane (1) has a lifting state and a lowering state. In the lifting state, at least one of the lithium ion capacitor (3), the chemical battery pack (4), and the new energy power station (7) supplies power to the first generator motor (2) and drives the loading and unloading crane (1) to lift the material (6). In the lowering state, the material (6) falls by its own weight, driving the first generator motor (2) to generate electricity and transmit it to the lithium ion capacitor (3) and the chemical battery pack (4). A power grid system, electrically connected to the lithium ion capacitor (3), the chemical battery pack (4) and the new energy power station (7), respectively, to transmit electricity to power-consuming equipment or energy storage equipment; The chemical battery pack (4) comprises a plurality of chemical batteries, and the plurality of chemical batteries enter a charging state or a discharging state in turn, each chemical battery is provided with a charging threshold and a discharging threshold, and enters a charging state when the electric quantity reaches the charging threshold, and enters a discharging state when the electric quantity reaches the discharging threshold; The energy storage device comprises a potential energy storage power station (5), the potential energy storage power station (5) being electrically connected to the first generator motor (2), and in the raised state, the potential energy storage power station (5) being capable of supplying power to the first generator motor (2); The potential energy storage power station (5) comprises: A power station body (501) is provided with a plurality of storage frames (502) therein, wherein the storage frames (502) are used to store the materials (6); A plurality of potential energy cranes (503) are arranged at movable intervals on the top of the power station body (501); each of the potential energy cranes (503) is provided with a second generator motor (504); and the second generator motor (504) is also electrically connected to the lithium ion capacitor (3) and the power grid system respectively; The potential energy storage power station (5) has an energy storage state and a power generation state. In the energy storage state, the second generator motor (504) drives the potential energy crane (503) to drive the material (6) to rise and store it on the storage frame (502). In the power generation state, the material (6) falls by its own weight and drives the second generator motor (504) to generate electricity and transmit it to the lithium ion capacitor (3) and the power grid system. The potential energy storage power station (5) enters an energy storage state in response to a surplus of electricity from the new energy power station (7); The potential energy storage power station (5) enters a power generation state in response to a power shortage of the new energy power station (7); At least two groups of lithium ion capacitors (3) are provided, wherein one group of lithium ion capacitors (3) is provided on the loading and unloading crane (1) and is used to recover part of the electricity generated by the first generator motor (2) in the descending state, and the other group of lithium ion capacitors (3) is provided in the power station body (501) and is used to recover the electricity generated by the second generator motor (504) in the variable speed stage in the power generation state, and the electricity generated by the second generator motor (504) in the uniform speed stage is transmitted to the power consumption equipment through the power grid system; It also includes a detection module and a control module, the detection module is used to detect the working parameters of the first generator motor (2), the working parameters at least include the voltage parameters of the first generator motor (2), and the control module is electrically connected to the detection module, the lithium ion capacitor (3) and the chemical battery pack (4) respectively, and is used to receive the working parameter signal of the first generator motor (2) detected by the detection module; Based on the operating parameter signal, the control module controls the lithium ion capacitor (3) and the chemical battery pack (4) to enter a charging state to recover the electricity generated by the first generator motor (2), or controls the lithium ion capacitor (3) and the chemical battery pack (4) to enter a discharging state to supply power to the first generator motor (2).

2. The port distributed high-efficiency energy recovery system according to claim 1 is characterized in that: The loading and unloading crane (1) comprises: A first sling (101) for connecting the material (6); A first reel (102) is electrically connected to the first generator motor (2) via a first transmission mechanism; The first flexible rope (103) is respectively connected to the first sling (101) and the first drum (102).

3. The port distributed high-efficiency energy recovery system according to claim 1 is characterized in that: Each of the potential energy cranes (503) comprises: A second sling (5031) for connecting the material (6); A second reel (5032) is electrically connected to the second generator motor (504) via a second transmission mechanism (5034); The second flexible rope (5033) is respectively connected to the second sling (5031) and the second drum (5032).

4. The port distributed high-efficiency energy recovery system according to claim 3 is characterized in that: Each of the potential energy cranes (503) further comprises: A crossbeam (5035) is provided on the top of the power station body (501); A first walking mechanism (5036) is provided at both ends of the crossbeam (5035) and is used to drive the crossbeam (5035) to move along a length direction perpendicular to the crossbeam (5035); The second traveling mechanism (5037) is arranged on the beam (5035), and the second sling (5031) is arranged on the second traveling mechanism (5037). The second traveling mechanism (5037) can drive the second sling (5031) to move along the length direction of the beam (5035).

5. The port distributed high-efficiency energy recovery system according to claim 1 is characterized in that: The potential energy storage power station (5) further comprises: A plurality of transport platforms (505) are arranged at movable intervals within the power station body (501) and are arranged corresponding to the storage frame (502); Each of the carrying platforms (505) comprises: A first platform (5051) is provided in the power station body (501) and is movable along a first direction; a second platform (5052) disposed on the first platform (5051) and capable of moving along a second direction for carrying the material (6), the first direction being perpendicular to the second direction; A lifting mechanism (5053) is also provided at the upper end of the second platform (5052), and the lifting mechanism (5053) is used to lift or lower the material (6).

6. The port distributed high-efficiency energy recovery system according to claim 1, characterized in that: The power station body (501) is provided with an energy storage area (5011), an intermediate area (5012) and a storage area (5013) in order from high to low; In the energy storage state, the potential energy crane (503) is suitable for driving the material (6) from the storage area (5013) into the energy storage area (5011); In the power generation state, the potential energy crane (503) is suitable for driving the material (6) from the energy storage area (5011) into the storage area (5013).

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