CN111181183A - Ship shore power system and control method - Google Patents
Ship shore power system and control method Download PDFInfo
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Abstract
The invention discloses a ship shore power system, which comprises an alternating current power distribution module, a charge-discharge module, an energy storage module, a fire-fighting module and a main control module, wherein the charge-discharge module, the energy storage module, the fire-fighting module and the main control module are arranged on a container; the alternating current distribution module is connected with the charge-discharge module through an identifiable plug and is used for converting the voltage of the power grid into input voltage; the charging and discharging module comprises an inverter, a transformer and an energy storage converter which are sequentially connected, the input end of the inverter is connected with the alternating current distribution module, the output end of the energy storage converter is connected with the energy storage module, and the main control module is used for controlling the charging and discharging module according to the residual electric quantity of the energy storage module; receiving input voltage, and outputting charging voltage, or converting the voltage of the energy storage module into grid-connected voltage, or sharing the energy storage module with other ships; according to the invention, redundant electric energy of the energy storage module can be merged into a power grid or shared. In addition, the invention also discloses a control method of the ship shore power system.
Description
Technical Field
The invention belongs to the technical field of power supply equipment, and particularly relates to a ship shore power system and a control method.
Background
Nowadays, large ships, particularly oil tankers and container ships, usually use fuel products to generate electricity when they are in port to meet the electricity demand of the ships. In recent years, with the frequent high innovation of fuel oil price, the cost of ship power generation is continuously increased, and heavy oil generates a large amount of sulfides and nitrogen oxides in the combustion process, thereby causing serious pollution to the surrounding environment. If a land power grid is adopted to supply power to ships in a harbor, the environmental pollution of the harbor area can be greatly reduced, clean and pleasant green harbors can be built, the running cost of the ships in the harbor can be reduced, the power supply income of the harbor and the power generation department of the harbor can be increased, and the method has important significance for energy conservation and emission reduction.
The inventors have found that the existing solutions have at least the following drawbacks: redundant electric energy in the energy storage device cannot be merged into a power grid or shared.
Disclosure of Invention
One of the objects of the present invention is: aiming at the defects of the prior art, the ship shore power system is provided, redundant electric energy of the energy storage module can be merged into a power grid or shared, the flexibility of the ship shore power system is improved, and the use cost of the ship shore power system is reduced.
In order to achieve the purpose, the invention adopts the following technical scheme:
a ship shore power system comprises an alternating current power distribution module, a charge-discharge module, an energy storage module, a fire-fighting module and a main control module, wherein the charge-discharge module, the energy storage module, the fire-fighting module and the main control module are arranged on a container;
the alternating current distribution module is connected with the charge-discharge module through an identifiable plug and is used for converting the voltage of a power grid into input voltage;
the charging and discharging module comprises an inverter, a transformer and an energy storage converter which are sequentially connected, the input end of the inverter is connected with the alternating current distribution module, the output end of the energy storage converter is connected with the energy storage module, and the main control module is used for controlling the charging and discharging module according to the residual electric quantity of the energy storage module; receiving the input voltage, and outputting a charging voltage, or converting the voltage of the energy storage module into a grid-connected voltage, or sharing the energy storage module with other ships;
and the energy storage module is used for storing the electric energy of the power grid and feeding back the residual electric quantity to the main control module in real time.
As an improvement of the ship shore power system, the charging and discharging module further comprises a DC/DC bidirectional converter, and the DC/DC bidirectional converter is arranged between the transformer and the energy storage converter.
As an improvement of the ship shore power system, the charge-discharge module and the main control module are communicated through a CAN bus.
As an improvement of the ship shore power system, the alternating current power distribution module and the energy storage module are respectively provided with a voltage monitor and a current monitor, and the voltage monitor and the current monitor are respectively connected with the main control module.
As an improvement of the ship shore power system, the alternating current power distribution module is arranged on the container or the wharf, the input end of the identifiable plug is connected with the alternating current power distribution module, and the output end of the identifiable plug is connected with the inverter.
As an improvement of the ship shore power system, the top or the side of the container is provided with a plurality of radiators.
As an improvement of the ship shore power system, the main control module is a PLC controller or an embedded controller.
As an improvement of the ship shore power system, the ship shore power system is further provided with a fire-fighting module, the fire-fighting module comprises a controller, a plurality of detectors and a plurality of releasers which are sequentially connected, the detectors and the releasers are arranged on the top of the container side by side, and the controller is in communication connection with the main control module.
As an improvement of the ship shore power system, the ship shore power system is further provided with a control screen and an alarm, and the control screen and the alarm are connected with the main control module.
Another object of the present invention is to provide a method for controlling a ship shore power system, comprising:
presetting relevant parameters of a charge-discharge module;
monitoring the residual electric quantity of the energy storage module in real time, and when the residual electric quantity of the energy storage module is larger than a preset threshold value, merging the energy storage module into a power grid or sharing the energy storage module among ships; and when the residual electric quantity of the energy storage module is smaller than the preset threshold value, connecting the power grid to charge the energy storage module.
It should be noted that in the control method of the present invention, the remaining power of the energy storage module is monitored in real time, so as to facilitate accurate judgment of the use state of the energy storage module, and the sharing is performed through the cloud, so as to improve the sharing degree of the energy storage module, thereby reducing the overall use cost of the energy storage module; when energy storage module's residual capacity is less than when predetermineeing the threshold value, energy storage module's electric quantity is lower promptly, can place energy storage module and take communication function's pier or other battery charging outfit to charge, help realizing energy storage module cyclic utilization, simultaneously, near the energy storage module also can be looked over through high in the clouds or other data sharing modes to the user, before energy storage module's electric quantity is lower, find near the energy storage module that is full of electricity and charge to energy storage module, reduce the probability that main energy storage module takes place the insufficient electricity, thereby prolong energy storage module's life.
As an improvement of the control method of the ship shore power system, the method further comprises the following steps:
monitoring the voltage and the current of the power grid and the energy storage module in real time, and cutting off input and sending an alarm prompt when the voltage or the current of the power grid exceeds a preset limit value; and when the voltage or the current of the energy storage module exceeds a preset limit value, the output is cut off and an alarm prompt is sent out.
The intelligent fire-fighting container has the beneficial effects that the intelligent fire-fighting container comprises an alternating current power distribution module, a charge-discharge module, an energy storage module, a fire-fighting module and a main control module, wherein the charge-discharge module, the energy storage module, the fire-fighting module and the main control module are arranged on the container; the alternating current distribution module is connected with the charge-discharge module through an identifiable plug and is used for converting the voltage of a power grid into input voltage; the charging and discharging module comprises an inverter, a transformer and an energy storage converter which are sequentially connected, the input end of the inverter is connected with the alternating current distribution module, the output end of the energy storage converter is connected with the energy storage module, and the main control module is used for controlling the charging and discharging module according to the residual electric quantity of the energy storage module; receiving the input voltage, and outputting a charging voltage, or converting the voltage of the energy storage module into a grid-connected voltage, or sharing the energy storage module with other ships; and the energy storage module is used for storing the electric energy of the power grid and feeding back the residual electric quantity to the main control module in real time. Because the existing shore power system cannot integrate redundant electric energy in the energy storage device into a power grid or share the redundant electric energy, the modules are arranged in a container, short-distance vehicle-mounted transportation can be carried out, and energy storage module sharing among ships is facilitated; when the residual electric quantity of the energy storage module is larger than a preset threshold value, namely the electric quantity of the energy storage module is sufficient, the energy storage module can be incorporated into a power grid, and can also be communicated with other ships through a server to realize the sharing of the energy storage module; when the residual electric quantity of the energy storage module is smaller than a preset threshold value, namely the electric quantity of the energy storage module is low, the energy storage module can be placed on a wharf with a communication function or other charging equipment for charging, the energy storage module can be recycled, meanwhile, a user can also look up the adjacent energy storage module, before the electric quantity of the energy storage module is low, the adjacent fully charged energy storage module is found and the energy storage module is charged, the probability of power shortage of the main energy storage module is reduced, and therefore the service life of the energy storage module is prolonged; the inverter is a DC to AC transformer, which is a voltage inversion process with the converter, adopts a pulse width modulation technology with more use, and the core part of the inverter is a PWM integrated controller, and an error amplifier, a regulator, an oscillator, a PWM generator with dead zone control, a low-voltage protection loop and a short-circuit protection loop are arranged in the PWM integrated controller; the energy storage converter CAN control the charging and discharging process of the storage battery, carry out alternating current-direct current conversion, CAN directly supply power for alternating current load under the condition of no power grid, the energy storage converter comprises a DC/AC bidirectional converter, a control unit and the like, the PCS controller receives a background control instruction through communication, controls the converter to charge or discharge the battery according to the symbol and the size of the power instruction, and realizes the regulation of the active power and the reactive power of the power grid, and the PCS controller communicates with the BMS through a CAN interface to obtain the state information of the battery pack, so that the protective charging and discharging of the battery CAN be realized, and the safe operation of the battery CAN be ensured; the container inner space is great, and possesses good ventilation heat dissipation environment, guarantees the normal steady operation of equipment. According to the invention, redundant electric energy of the energy storage module can be merged into a power grid or shared, so that the flexibility of the ship shore power system is improved, and the use cost of the ship shore power system is reduced.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a circuit diagram of an ac power distribution module according to the present invention.
Fig. 3 is a circuit diagram of an inverter according to the present invention.
Fig. 4 is a circuit diagram of the DC/DC bidirectional converter of the present invention.
Fig. 5 is a circuit diagram of a container and ac power distribution module of the present invention.
Wherein: 1-an alternating current distribution module; 2-a charge-discharge module; 3-an energy storage module; 4-a fire-fighting module; 5, a main control module; 21-an inverter; 22-a transformer; 23-an energy storage converter; a 24-DC/DC bidirectional converter; 41-a controller; 42-a detector; 43-a releaser; 6-plug identification.
Detailed Description
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", horizontal ", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The present invention will be described in further detail below with reference to the accompanying drawings, but the present invention is not limited thereto.
Example 1
As shown in fig. 1 to 5, a ship shore power system includes an ac power distribution module 1, a charge-discharge module 2, an energy storage module 3 and a main control module 5, wherein the charge-discharge module 2, the energy storage module 3 and the ac power distribution module 1 are installed in a container, and the ac power distribution module 1, the charge-discharge module 2 and the energy storage module 3 are all connected to the main control module 5; the alternating current distribution module 1 is connected to the charge-discharge module 2 through the identifiable plug 6 and is used for converting the voltage of a power grid into input voltage; the charging and discharging module 2 comprises an inverter 21, a transformer 22 and an energy storage converter 23 which are sequentially connected, the input end of the inverter 21 is connected with the alternating current distribution module 1, the output end of the energy storage converter 23 is connected with the energy storage module 3, and the main control module 5 is used for controlling the charging and discharging module 2 according to the residual electric quantity of the energy storage module 3; receiving input voltage, and outputting charging voltage, or converting the voltage of the energy storage module 3 into grid-connected voltage, or sharing the energy storage module 3 with other ships; and the energy storage module 3 is used for storing the electric energy of the power grid and feeding back the residual electric quantity to the main control module 5 in real time. Because the existing shore power system cannot integrate redundant electric energy in the energy storage device into a power grid or share the redundant electric energy, the modules are arranged in a container, short-distance vehicle-mounted transportation can be carried out, and the energy storage modules 3 among ships can be conveniently shared, and because the same energy storage modules 3 are adopted among the ships, namely the same structure and battery model are adopted, the charging efficiency of the battery is improved, and the influence on the charging efficiency caused by different battery models, battery combination modes and battery rated parameters of different ships is not required to be considered; when the residual electric quantity of the energy storage module 3 is larger than a preset threshold value, namely the electric quantity of the energy storage module 3 is sufficient, the energy storage module can be incorporated into a power grid, and can also be communicated with other ships through a server to realize sharing of the energy storage module 3; when the residual electric quantity of the energy storage module 3 is smaller than a preset threshold value, namely the electric quantity of the energy storage module 3 is lower, the energy storage module 3 can be placed on a wharf or other charging equipment with a communication function for charging, so that the energy storage module 3 can be recycled, meanwhile, a user can also look up the adjacent energy storage module 3, before the electric quantity of the energy storage module 3 is lower, the adjacent fully charged energy storage module 3 is found and the energy storage module 3 is charged, the probability of power shortage of the main energy storage module 3 is reduced, the service life of the energy storage module 3 is prolonged, in addition, the ship does not need to wait for the complete charging of the energy storage module 3, does not need to wait for the long grid connection process of the energy storage module 2, and only needs to replace the fully charged energy storage module 3; the inverter 21 is a DC to AC transformer, which is a voltage inversion process with a converter, and adopts a pulse width modulation technique, and the core part of the inverter is a PWM integrated controller, and an error amplifier, a regulator, an oscillator, a PWM generator with dead zone control, a low voltage protection circuit and a short circuit protection circuit are arranged in the PWM integrated controller; the energy storage converter 23 CAN control the charging and discharging process of the storage battery, carry out alternating current-direct current conversion, CAN directly supply power for alternating current load under the condition of no power grid, the energy storage converter 23 is composed of a DC/AC bidirectional converter, a control unit and the like, the PCS controller receives a background control instruction through communication, controls the converter to charge or discharge the battery according to the symbol and the size of the power instruction, realizes the regulation of the active power and the reactive power of the power grid, and the PCS controller communicates with the BMS through a CAN interface to obtain the state information of the battery pack, realize the protective charging and discharging of the battery, and ensure the safe operation of the battery; the container inner space is great, and possesses good ventilation heat dissipation environment, guarantees the normal steady operation of equipment.
Preferably, the charging and discharging module 2 further comprises a DC/DC bidirectional converter 24, and the DC/DC bidirectional converter 24 is disposed between the transformer 22 and the energy storage converter 23. The DC/DC bidirectional converter 24 reduces the floating charge voltage of the energy storage module 3 to realize the electric power storage function, and when the power supply end of the power grid fails, the energy storage module 3 bidirectional DC/DC converter 24 completes the voltage boost to reach the voltage level required by the load end, so as to supply power for the direct current electric equipment of the ship.
Preferably, the charging and discharging module 2 and the main control module 5 communicate with each other through a CAN bus. The CAN bus is connected with the physical bus through two output ends CANH and CANL of a CAN transceiver interface chip 82C250, the state of the CANH end CAN only be a high level or a suspension state, the CANL end CAN only be a low level or a suspension state, and the CAN node has an automatic output closing function under the condition of serious errors, so that the operation of other nodes on the bus is not influenced, thereby ensuring that the bus is in a deadlock state due to the problem of individual nodes, and the perfect communication protocol of the CAN CAN be realized by the CAN controller chip and the interface chip thereof, thereby greatly reducing the difficulty of system development and shortening the development period.
Preferably, the ac power distribution module 1 and the energy storage module 3 are both provided with a voltage monitor and a current monitor, and both the voltage monitor and the current monitor are connected to the main control module 5. The voltage monitor is used for monitoring the voltages of the alternating current distribution module 1 and the energy storage module 3 in real time, the current monitor is used for monitoring the current changes of the alternating current distribution module 1 and the energy storage module 3 in real time, and as the alternating current distribution module 1 is directly connected with a power grid, the voltage monitor and the current monitor can find out the fault of the input end of the power grid in time, so that the ship shore power system is prevented from being damaged by high voltage or heavy current; the voltage and the current of the energy storage module 3 are monitored in real time, the probability of overvoltage, undervoltage or overcurrent of the energy storage module 3 is reduced, the effects of preventing lightning surge and preventing battery current from flowing backwards in a charging state can be achieved, and the service life of the energy storage module 3 is prolonged. Wherein, voltage monitor and current monitor are the model that can directly purchase on the market and get.
Preferably, the ac distribution module 1 is installed in a container or a dock, and the input terminal of the identifiable plug 6 is connected to the ac distribution module 1 and the output terminal of the identifiable plug 6 is connected to the inverter 21. Increase distinguishable plug 6, not only can reduce the probability that takes place the misplug, improve the steadiness between cable and the module, can also monitor the change of voltage and electric current through the chip in distinguishable plug 6, avoid high pressure or heavy current to damage boats and ships bank electric system.
Preferably, the top or side of the container is provided with several radiators. Increase a plurality of radiator, need possess good ventilation heat dissipation environment in the assurance container to guarantee the normal steady operation of system, wherein, a plurality of radiator can also cooperate temperature regulation apparatus for the environmental parameter of control container avoids adverse service environment influence system's such as high temperature, high humidity, high corrosivity, heavy load impact normal use of quayside pier, helps improving system's reliability.
Preferably, the main control module 5 is a PLC controller or an embedded controller. The PLC controller adopts a programmable memory, is used for storing programs, executing logic operation, sequence control, timing, counting, arithmetic operation and other instructions facing users in the PLC controller, and controls various types of machinery or production processes through digital or analog input/output; the embedded controller is a control system which is used for executing a designated independent control function and has the capability of processing data in a complex mode, and is an electronic device or a device which is controlled by an embedded microelectronic technology chip, including a series of microelectronic devices such as a microprocessor chip, a timer, a sequencer or a controller and the like, and can complete various automatic processing tasks such as monitoring, control and the like, wherein the PLC controller or the embedded controller is a model which can be directly purchased in the market.
Preferably, fire module 4 is still installed to boats and ships shore power system, and fire module 4 is including the controller 41, a plurality of detector 42 and a plurality of releaser 43 that connect gradually, and a plurality of detector 42 and a plurality of releaser 43 set up side by side in the top of container, and controller 41 is connected with the communication of main control module 5. Since the container in which the shore power module 1 and the fire fighting module are installed is influenced by sea waves and high temperature in the sea environment, the installation position of the detection unit 22 is high, and if the detection unit 22 is installed improperly, the measurement of the smoke concentration, the temperature value, the gas flow rate value and the oxygen concentration is inaccurate, therefore, in the present embodiment, the plurality of detecting units 22 and the plurality of releasing units 23 are arranged side by side on the top of the container, and compared with the case where they are installed on the side, the detecting units 22 are less likely to collide with the devices of the shore power module 1, and at the same time, because the smoke and the hot air can rise, the blocking of the top is less, the air flow is better, the change of the smoke concentration, the temperature value, the gas flow value and the oxygen concentration can be more easily detected when the smoke and the hot air are arranged on the top, in addition, in order to prevent the temperature in the container from being too high, the top and the side of the container are provided with heat insulation films. The detectors 42 are used for monitoring environmental changes in real time and converting the environmental changes into smoke concentration, temperature values, gas flow values and oxygen concentration, the controller 41 is used for receiving the smoke concentration, the temperature values, the gas flow values and the oxygen concentration of the detectors 42, and the releasers 43 release the fire extinguishing agent according to instructions of the controller 41.
Preferably, the ship shore power system is also provided with a control screen and an alarm, and the control screen and the alarm are connected with the main control module 5. Through the control screen, an operator can select a charging or discharging working mode, the operating system is started or stopped, the system can dynamically adjust charging and discharging parameters and execute corresponding actions according to the current state of the battery according to preset charging and discharging logic scripts, meanwhile, the interface of the control screen is convenient to operate, local setting and field control functions can be realized, the functions of field starting, emergency stopping and charging and discharging parameter setting can be realized, a charging control mode can be automatically or manually selected, and the control screen has the functions of running state, fault state display, running state monitoring and the like; the alarm is used for carrying out alarm prompt on various abnormalities of the ship shore power system, and is beneficial to improving the reliability of the system.
Example 2
The difference from example 1 is: the detector 42 of the present embodiment includes a temperature sensor, a smoke sensor, a gas flow rate measuring device, and an oxygen concentration measuring device, which are all connected to the control unit. The temperature sensor is used for monitoring the environmental change of the shore power module in real time and converting the environmental change into a corresponding temperature value, the smoke sensor is used for monitoring the environmental change of the shore power module in real time and converting the environmental change into a corresponding smoke concentration, oxygen is needed for supporting combustion in the early stage of a fire, oxygen begins to flow, the gas flow measuring device at the top can rapidly detect the flow of the gas, the fire can be found as early as possible, fire extinguishment is facilitated, large loss is reduced, meanwhile, the situation of the reduction of the oxygen can be found by the oxygen concentration measuring device in time, the fire can be found as early as possible, the control unit can judge whether the fire occurs or not according to the rising of the smoke concentration, the rising of the temperature value, the rising of the gas flow value and the descending of the oxygen concentration, the content of video monitoring. In addition, the marine environment where the container is located is complex and changeable, and a plurality of parameters are used as judgment bases, so that the accuracy of judging the fire can be improved, and the loss caused by the mistaken release of the fire extinguishing agent due to the misjudgment is reduced.
The other structures are the same as those of embodiment 1, and are not described again here.
Example 3
The difference from example 1 is: the identifiable plug 6 of the embodiment comprises a male plug and a female plug, wherein the male plug is provided with an identification chip, the female plug is provided with an identifier matched with the identification chip, so that the identification chip and the identifier of each line are paired one by one, but the male plug or the female plug of different identification chips cannot be paired, and the probability of misplug is favorably reduced; buffer layers for limiting shaking are sleeved on the outer sides of the male plug and the female plug; because when or after butt joint the boats and ships shore connection circuit, great wind can lead to public plug and female plug to rock, moreover, many boats and ships shore connection circuit contact each other, make public plug or female plug drop easily, in order to deal with the service environment of boats and ships shore connection circuit, consequently, establish the buffer layer in the outside of public plug and the outside cover of female plug, make public plug and female plug be in the same direction all the time, guarantee sinle silk connection between them promptly, reduce the probability that public plug or female plug take place to drop, help improving the steadiness of public plug and female plug.
The other structures are the same as those of embodiment 1, and are not described again here.
Example 4
As shown in fig. 1 to 5, a control method of a ship shore power system includes:
presetting relevant parameters of the charge and discharge module 2;
monitoring the residual electric quantity of the energy storage module 3 in real time, and when the residual electric quantity of the energy storage module 3 is larger than a preset threshold value, merging the energy storage module 3 into a power grid or sharing the energy storage module 3 among ships; when the residual electric quantity of the energy storage module 3 is smaller than a preset threshold value, connecting a power grid to charge the energy storage module 3;
it should be noted that, in the control method of the present invention, the remaining power of the energy storage module 3 is monitored in real time, so as to facilitate accurate judgment of the use state of the energy storage module 3, and the sharing is performed through the cloud, so as to improve the sharing degree of the energy storage module 3, thereby reducing the overall use cost of the energy storage module 3, when the remaining power of the energy storage module 3 is greater than the preset threshold, that is, the power of the energy storage module 3 is sufficient, and the energy storage module can be incorporated into the power grid, and can also communicate with other ships through the server, so as to implement sharing of the energy; when energy storage module 3's residual capacity is less than when predetermineeing the threshold value, energy storage module 3's electric quantity is lower promptly, can place energy storage module 3 and charge in the pier or other battery charging outfit of taking communication function, help realizing energy storage module 3 cyclic utilization, simultaneously, near energy storage module 3 also can be looked over through high in the clouds or other data sharing modes to the user, before energy storage module 3's electric quantity is lower, find near full-charge energy storage module 3 and charge energy storage module 3, reduce main energy storage module 3 and take place the probability of insufficient power, thereby prolong energy storage module 3's life.
Preferably, the method further comprises the following steps: monitoring the voltage and the current of the power grid and the energy storage module 3 in real time, and cutting off input and sending an alarm prompt when the voltage or the current of the power grid exceeds a preset limit value; when the voltage or the current of the energy storage module 3 exceeds a preset limit value, the output is cut off and an alarm prompt is sent out. The limit value is predetermine in the increase, can in time discover the trouble of electric wire netting input, avoids high pressure or heavy current to damage boats and ships bank electric system, can also reduce energy storage module 3 and take place the probability of excessive pressure, under-voltage or overcurrent, can also play the effect that the surge is hit in the lightning protection and prevent under the charged state that battery current flows backward, helps prolonging energy storage module 3's life.
Variations and modifications to the above-described embodiments may also occur to those skilled in the art, which fall within the scope of the invention as disclosed and taught herein. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious improvement, replacement or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. A ship shore power system, characterized in that: the container energy storage system comprises an alternating current distribution module (1), a charging and discharging module (2) arranged on a container, an energy storage module (3) and a main control module (5), wherein the alternating current distribution module (1), the charging and discharging module (2) and the energy storage module (3) are all connected to the main control module (5);
the alternating current distribution module (1) is connected to the charge-discharge module (2) through an identifiable plug (6) and is used for converting the voltage of a power grid into input voltage;
the charging and discharging module (2) comprises an inverter (21), a transformer (22) and an energy storage converter (23) which are sequentially connected, the input end of the inverter (21) is connected with the alternating current distribution module (1), the output end of the energy storage converter (23) is connected with the energy storage module (3), and the main control module (5) is used for controlling the charging and discharging module (2) according to the residual electric quantity of the energy storage module (3); receiving the input voltage and outputting a charging voltage, or converting the voltage of the energy storage module (3) into a grid-connected voltage, or sharing the energy storage module (3) with other ships;
the energy storage module (3) is used for storing the electric energy of the power grid and feeding back the residual electric quantity to the main control module (5) in real time.
2. A marine shore power system, according to claim 1, wherein: the charging and discharging module (2) further comprises a DC/DC bidirectional converter (24), and the DC/DC bidirectional converter (24) is arranged between the transformer (22) and the energy storage converter (23).
3. A marine shore power system, according to claim 1, wherein: the charge-discharge module (2) and the main control module (5) are communicated through a CAN bus.
4. A marine shore power system, according to claim 1, wherein: the alternating current distribution module (1) and the energy storage module (3) are both provided with a voltage monitor and a current monitor, and the voltage monitor and the current monitor are both connected with the main control module (5).
5. A marine shore power system, according to claim 1, wherein: the alternating current distribution module (1) is arranged on the container or the wharf, the input end of the identifiable plug (6) is connected with the alternating current distribution module (1), and the output end of the identifiable plug (6) is connected with the inverter (21).
6. A marine shore power system, according to claim 1, wherein: the main control module (5) is a PLC controller or an embedded controller.
7. A marine shore power system, according to claim 1, wherein: fire module (4) are still installed to boats and ships bank electricity system, fire module (4) are including controller (41), a plurality of detector (42) and a plurality of releaser (43), a plurality of that connect gradually detector (42) and a plurality of releaser (43) set up side by side in the top of container, controller (41) with master module (5) communication is connected.
8. A marine shore power system, according to claim 1, wherein: the ship shore power system is further provided with a control screen and an alarm, and the control screen and the alarm are connected with the main control module (5).
9. A method of controlling a marine shore power system, comprising:
presetting related parameters of a charge-discharge module (2);
monitoring the residual electric quantity of the energy storage module (3) in real time, and when the residual electric quantity of the energy storage module (3) is larger than a preset threshold value, merging the energy storage module (3) into a power grid or sharing the energy storage module (3) among ships; and when the residual electric quantity of the energy storage module (3) is smaller than the preset threshold value, connecting the power grid to charge the energy storage module (3).
10. The method of controlling a marine shore power system, according to claim 9, further comprising:
monitoring the voltage and the current of the power grid and the energy storage module (3) in real time, and cutting off input and sending out an alarm prompt when the voltage or the current of the power grid exceeds a preset limit value; and when the voltage or the current of the energy storage module (3) exceeds a preset limit value, the output is cut off and an alarm prompt is sent out.
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Cited By (2)
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| CN111897272A (en) * | 2020-08-18 | 2020-11-06 | 国网江苏省电力有限公司南通供电分公司 | A management and control device suitable for ship shore power system and its control system |
| CN112529468A (en) * | 2020-12-25 | 2021-03-19 | 力容新能源技术（天津）有限公司 | Operation mode method of shore power energy storage system and economic evaluation method thereof |
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