KR20130044459A - Electric propulsion ship using solar cell charging - Google Patents

Abstract

PURPOSE: An electric propulsion ship using solar cells is provided to directly charge DC electric energy provided from solar cell modules without converting into AC and to make an uneven voltage of a photovoltaic facility to a constant voltage so that a storage battery can be charged. CONSTITUTION: An electric propulsion ship using a solar comprises solar cell modules(10), a storage battery(30), a charging control board(20), and a propelling motor(40). The storage battery is electrically connected to the solar cell modules in parallel to store DC electric energy which is provided from the solar cell modules. The charging control board is electrically connected to the solar cell modules and the storage battery in order to control a DC voltage so that the DC electric energy can be directly charged to the storage battery. The charging control board makes the uneven voltage of the solar cell modules to the constant voltage which can charge the storage battery. The propelling motor generates rotation power using the electric energy of the storage battery. [Reference numerals] (20) Charging control board; (30) High-capacity storage battery; (70) DC generator(Diesel engine); (80) Land electricity connection unit; (90) Power management system(PMS)

Description

Electric propulsion ship using solar cell charging

The present invention relates to an electric propulsion ship using solar charging. More specifically, by configuring a charging control panel using a pulse width modulation switching regulator and connecting the solar cell modules in series, it is possible to directly charge the capacitor without converting the direct current electrical energy provided by the solar cell module to alternating current. The present invention relates to an electric propulsion ship using photovoltaic charging to adjust DC voltage so that the voltage of non-uniform photovoltaic equipment is a constant voltage capable of charging the battery, thereby utilizing eco-friendly renewable energy but minimizing losses.

A typical ship has a power propulsion device for driving a propeller mounted at the rear. There are many types of power propulsion devices, but there are two types of power propulsion systems, the steam turbine system and the electric propulsion system.

The steam turbine system is a rotary steam power prime mover, which is a kind of an external combustion engine that obtains power by blowing high pressure steam generated from a boiler from a nozzle to generate a high speed steam classification and spraying it on a rotating van.

The steam turbine system is widely applied to the propulsion engine of the ship as well as the thermal power generation because it is not only low vibration and efficient, but also high speed and large horsepower can be obtained. However, the steam turbine system has a disadvantage in that the noise is too loud and the scale is too large to unnecessarily increase the weight of the vessel.

In order to remedy these shortcomings, the electric propulsion system using the electric motor with less noise, less pollution and strong propulsion than the steam turbine system has been applied. The electric propulsion system of the ship is to propel the ship by driving the propulsion shaft connected to the propeller at the end by an electric motor for propulsion, and the electric propulsion system is applied to various types of vessels such as LNG carriers, cruise ships and drilling ships.

On the other hand, the ship is generally operated by driving the driving force from the output of the main engine, and the operating cost of the ship is greatly increased as the fossil fuel, in particular, crude oil driving the main engine is expensive. The electric propulsion system rotates the propellers at the rear of the ship by generating electricity from the fossil fuel and driving the motor through it. In addition, the ship is provided with a diesel engine generator as an auxiliary power source for supplying power to the deck, such as, the diesel engine generator also generates power using fossil fuel.

As such, many studies have been made to reduce the operating costs of ships by fossil fuels. For example, some of the waste energy including waste heat generated during ship operation is recycled, or natural energy that can be easily obtained during ship operation is used. There is a quantitative limit to replenishing the energy needed for ship operations by recycling waste energy. Natural energy that can be easily obtained during ship operation include solar and wind.

1 is a configuration diagram of the charging of a general solar charging electric propulsion vessel.

In the electric propulsion ship by general solar charging as shown in FIG. 1, the DC power produced by the solar module 1 is charged to the high capacity storage battery 4 through the DC converter 2, and also the DC converter 2 is charged. Through the DC power is converted into AC power through the inverter (3) is to be delivered to the AC power consumer (5). When charging the battery using sunlight, since the voltage and power produced from time to time vary according to the brightness of the sun, several conversions must be performed in the middle as shown in FIG.

According to this general charging configuration, the primary power loss occurs in the process of converting DC power to AC power, and the secondary power loss occurs when converting from AC power to DC power again. When power conversion is performed in this way, since solar power is limited in amount of power generation, power loss of about 10% or more occurs.

Therefore, there is a need to develop a technology capable of minimizing the power loss due to frequent power conversion while utilizing the electrical energy produced by the solar module as a power source of the electric propulsion ship.

The present invention has been made to solve the above problems, in particular to adjust the DC voltage to directly charge the capacitor without converting the direct current electrical energy provided by the solar cell module to the alternating current, and the The purpose is to provide an electric propulsion ship using solar charging that utilizes renewable energy and minimizes losses by making the voltage a constant voltage capable of charging the battery.

In order to achieve the above object, the electric propulsion ship using solar charging according to the present invention includes a solar cell module connected in series; A storage battery electrically connected to the solar cell module to store direct current electrical energy provided by the solar cell module and connected in parallel; The DC voltage is adjusted to be directly connected to the solar cell module and the storage battery so as to directly charge the DC battery with the DC electric energy provided by the solar cell module, and the voltage of the non-uniform voltage of the solar cell module can be charged. Charge control panel using a switching regulator (Switching Regulator) to make a constant voltage; And a propulsion motor for generating rotational power using the electrical energy stored in the battery.

The switching regulator may adjust the output voltage using a pulse width modulation (PWM) method.

In addition, the switching regulator may be to adjust the time (ON) for the entire period, and to make a direct current by using an LC filter.

The electric propulsion vessel is electrically connected to the solar cell module, the storage battery, the charging control panel, and the propulsion motor to control the rotation speed of the propulsion motor, and to control the charging, discharging, and distribution of the storage battery. It may further include a (Power Management System).

In addition, the electric propulsion vessel includes an inverter for converting the DC power of the storage battery into an AC power to supply power to the general load onboard; A direct current generator for heating the ship and charging the storage battery; A converter for adjusting the DC voltage for supplying power to the on-board general load and starting of the diesel engine provided in the DC generator; A propulsion converter for converting power of the storage battery into driving power of the propulsion motor to supply power to the propulsion motor; And a ground connection for charging the storage battery through land electrical equipment.

According to the present invention, by configuring a charging control panel using a switching regulator using a pulse width modulation method and connecting the solar cell modules in series, it is possible to charge the capacitor directly without converting the direct current electrical energy provided by the solar cell module into alternating current. By adjusting the DC voltage so that the uneven photovoltaic facility voltage is a constant voltage to charge the battery, it is possible to utilize eco-friendly renewable energy but minimize the loss.

1 is a charging configuration diagram of a general solar charging electric propulsion vessel,
2 is a circuit diagram of an electric propulsion ship using solar charging according to a preferred embodiment of the present invention;
3 is a voltage characteristic diagram of a PWM switching regulator of the charge control panel in FIG. 2.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In addition, the preferred embodiments of the present invention will be described below, but it is needless to say that the technical idea of the present invention is not limited thereto and can be variously modified by those skilled in the art.

2 is a circuit diagram of an electric propulsion ship using solar charging according to a preferred embodiment of the present invention.

Electric propulsion ship using solar charging according to a preferred embodiment of the present invention, referring to Figure 2, the solar cell module 10, the charging control panel 20, the storage battery 30, the propulsion motor 40, the inverter ( 50), the converter 60, the DC generator 70, the ground connection portion 80, and the power management control panel 90 is made.

The solar cell module 10 is an energy supply source for charging the storage battery 30. Electric propulsion ship according to a preferred embodiment of the present invention by storing the electrical energy produced in the solar cell module 10 immediately in the storage battery 30, unlike the ship to generate excess fossil fuel to waste the excess electrical energy, The use of clean energy, renewable energy, minimizes environmental impact and energy waste.

The solar cell module 10 is connected in series to allow the storage battery 30 to be charged, and the DC power produced by the solar cell module 10 is directly supplied to the power management control panel 90.

The charging control panel 20 is electrically connected to the solar cell module 10 and the storage battery 30 so as to directly charge the direct current electrical energy provided by the solar cell module 10 to the storage battery 30, a constant voltage, Charges in constant current mode and has various protection functions and built-in alarm. That is, the charging control panel 20 receives the DC power from the solar cell module 10 to adjust the voltage to be chargeable, and then charge the storage battery 30. The charging control panel 20 is an auxiliary charging device that discharges the battery 30 gradually during operation and gradually decreases the voltage and performs charging before the final voltage. The IGBT high frequency conversion method is applied and the stability of the output voltage is 0.5%. It is stabilized within.

When charging the battery using sunlight, the photovoltaic equipment changes the voltage and power produced according to the brightness of the sun. The charging control panel 20 serves to make the voltage of the non-uniform solar installation constant to a voltage capable of charging the battery. This is because charging using solar equipment should always be able to produce a constant voltage power regardless of the power generation capacity of the solar installation, and should be able to charge the battery with a current corresponding to the generated power.

The charging control panel 20 adjusts the DC voltage to directly charge the battery 30, but switching regulator to make the voltage of the non-uniform solar cell module 10 to a constant voltage capable of charging the battery 30. ).

A switching regulator is a direct current power supply which interrupts direct current by a switching element, and adjusts the average current supplied to a load by changing the on / off time ratio in one interruption period. For example, the switching regulator applied to the charging control panel 20 may adjust the output voltage by using a pulse width modulation (PWM) method as shown in FIG. 3. By adjusting the ON time for the entire period and directing it with a LC filter, there is no theoretical loss and no heat.

In conclusion, the charging control panel 20 is capable of charging the storage battery 30 by minimizing energy loss by converting the DC power produced by the solar cell module 10 into AC power instead of AC power.

When charging the storage battery 30 through the charging control panel 20, various protection functions and alarm functions are built in so that the charging control panel 20 is not damaged through reverse current in the storage battery 30. It has a built-in communication port. The storage battery 30 is only charged through the charging control panel 20, the energy stored in the storage battery 30 to be always discharged.

The storage battery 30 is electrically connected to the solar cell module 10 to store direct current electrical energy provided to the solar cell module 10. The storage battery 30 uses a high efficiency / high capacity storage battery, and is preferably connected in parallel with the storage module in consideration of the operating voltage of the propulsion motor 40. By configuring the storage battery 30 as described above, even when a failure occurs in the unit module of the storage battery, the battery 30 can be continuously used regardless of this.

The propulsion motor 40 provides a propulsion force to the vessel by generating a rotational power by using the electrical energy stored in the storage battery 30. The propulsion motor 40 is controlled to the forward rotation and reverse rotation and the RPM (RPM) through the rotation speed control drive included in the power management control panel 90. The propulsion motor 40 is preferably provided in plurality in order to obtain the desired propulsion force and to adjust the magnitude of the power.

Inverter 50 is a DC / AC Inverters for converting the DC power of the storage battery 30 to the AC power to supply power to the general onboard load. In one example, the inverter 50 converts the DC power of the storage battery 30 to AC 220V to supply power to various kitchen appliances and home appliances in the ship. The inverter 50 adopts the IGBT high frequency conversion method, the stability of the output voltage is stabilized within 0.5%, constant voltage mode operation is possible, and various protection functions and alarm functions are built in. It also has a built-in communication port for remote operation control and monitoring.

The converter 60 is a DC / DC converter that adjusts the voltage of the battery to a DC voltage for supplying power to the onboard general load and starting of the diesel engine provided in the DC generator 70. That is, the converter 60 converts the battery power into DC 12V and supplies the DC generator 70 to start the diesel engine or supplies DC 12V power based on the capacity of the general load. The converter 60 adopts the IGBT high frequency conversion method, the stability of the output voltage is stabilized within 0.5%, constant voltage mode operation is possible, and various protection functions and alarm functions are built in. It also has a built-in communication port for remote operation control and monitoring.

Although not shown, an electric propulsion ship using solar charging according to a preferred embodiment of the present invention may be further provided with a propulsion converter. The propulsion converter is a converter for stepping down the DC voltage in order to use the voltage of the storage battery 30 as a power source for driving the propulsion motor 40. Propulsion converter adopts IGBT high frequency conversion method, the stability of output voltage is stabilized within 0.5%, it is possible to operate in constant voltage mode, and it has various protection functions and alarm functions. It also has a built-in communication port for remote operation control and monitoring.

The DC generator 70 includes a prime mover including a diesel engine, and is operated to charge the storage battery 30 so as to meet the performance requirements of the ship in the case of heating, emergency or operating distance.

Land connection portion 80 is a device for fast charging the storage battery 30 to the portion connected to the charging facility of the land when anchoring the ship. The land connecting portion 80 is installed near the dock of the land and is manufactured outdoors, and when the connection with the charging facility is made, the battery 30 is automatically or manually charged.

The ground connection portion 80 applies the IGBT high frequency conversion method and the stability of the output voltage is stabilized within 0.5%, constant voltage mode operation is possible, and various protection functions and alarm functions are built in. It also has a built-in communication port for remote operation control and monitoring.

The power management control panel 90 is electrically connected to the solar cell module 10, the charging control panel 20, the storage battery 30, and the propulsion motor 40 to control the rotational speed of the propulsion motor 40 and the storage battery 30. Control charging, discharging, and distribution. The power management control panel 90 provides power distribution and switching functions in a single unit to drive the propulsion motors through electric energy sources such as storage batteries, generators and solar cell modules, which are most important in electric propulsion vessels. Make it possible to drive.

The power management control panel 90 includes a drive function for controlling the thrust of the propulsion motor 40 as well as a switchboard function applied to a general electric propulsion ship. That is, the power management control panel 90 controls the rpm of the propulsion motor 40 and controls the forward rotation and the reverse rotation.

The power management control panel 90 performs power distribution and switching functions. At this time, the power management control panel 90 is configured to supply energy according to the capacity of the circuit breaker, the circuit breaker to enable the circuit breaker when a fault current occurs.

The power management control panel 90 is an electronic device for integrated control of all operation equipments on the ship. The power management control panel 90 collectively controls and monitors various power installations, conversion facilities, storage batteries 30 and other control devices installed on the ship through the LCD monitor. Done. It analyzes the information collected from various devices and displays them in figures or figures on the screen in real time, and selects the module to be set and changes or sets various information. do. In addition, all collected information is stored as data and can be reflected in various functional improvements by utilizing fault information and driving information.

Upon charging the battery via sunlight, the power management control panel 90 turns on the associated switch to charge the battery 30 automatically or manually when rechargeable power is produced. If the power of the battery is not available to the general load on the ship is expected to be inconvenient due to frequent circuit breaks, the general load on the ship can be used to directly convert the electrical energy supplied by the battery.

When propelled or anchored at sea, the power management control panel 90 drives a DC diesel generator to turn on the relevant switch to charge the battery 30 automatically or manually. At this time, the charging of the battery through the diesel generator can be charged regardless of the current operating state of the shelf, except for charging using land.

When the ground connection is made at the port docking, the power management control panel 90 turns on the relevant switch for charging the battery automatically or manually. When charging over land, it is desirable to stop charging using a DC generator for propulsion and cost reduction.

Power for the general load on board the power management control panel 90 is turned on (ON) so that it can be always supplied through the converter and inverter, the converter and inverter for general load is applied a circuit breaker according to the current capacity.

In recent years, the use of electric propulsion ships is expected to increase rapidly due to limited carbon emissions due to environmental pollution, increased fossil energy costs, and protection of marine ecosystems. In such a situation, the electric propulsion ship using solar charging according to the preferred embodiment of the present invention, unlike the conventional solar energy use method, immediately save the produced solar energy in the storage battery to minimize energy loss and maximize utilization efficiency This prevents environmental pollution while maximizing efficiency and flexibility by minimizing operating costs.

Electric propulsion ship using solar charging according to a preferred embodiment of the present invention in order to enable the charging of the battery without energy loss by converting the electrical energy produced in the solar cell module from DC to AC, again from AC to DC In order to achieve the maximum efficiency, a dedicated charger capable of adjusting the charging voltage is installed to charge the electrical energy generated by the solar cell module. In addition, the electric energy stored in the battery is directly used for propulsion of the ship or converted to AC or DC power to operate lighting and home appliances provided in the ship's residence and to operate other electric equipments to minimize electric energy loss and operate. Help reduce costs

In addition, the electric propulsion ship using solar charging according to a preferred embodiment of the present invention by connecting the solar cell modules in series to produce a voltage capable of charging the battery, in order to smoothly charge the battery than the charge voltage of the battery in the charge control panel A slightly higher voltage is applied to improve maximum battery charging efficiency.

It will be apparent to those skilled in the art that various modifications, substitutions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. will be. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical spirit of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by the embodiments and the accompanying drawings. . The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

10-Solar Module 20-Charge Control Panel
30-Storage battery 40-Propulsion motor
50-Inverter 60-Converter
70-DC generator 80-Ground connection
90-Power Management Control Board

Claims (5)

Solar cell modules connected in series;
A storage battery electrically connected to the solar cell module to store direct current electrical energy provided by the solar cell module and connected in parallel;
The DC voltage is adjusted to be directly connected to the solar cell module and the storage battery so as to directly charge the DC battery with the DC electric energy provided by the solar cell module, and the voltage of the non-uniform voltage of the solar cell module can be charged. Charge control panel using a switching regulator (Switching Regulator) to make a constant voltage; And
Propulsion motor for generating rotational power by using the electrical energy stored in the battery
Electric propulsion ship using solar charging comprising a. The method of claim 1,
The switching regulator is an electric propulsion ship using solar charging, characterized in that for adjusting the output voltage using a pulse width modulation (PWM) method. The method of claim 1,
The switching regulator adjusts the time (ON) for the entire period, the electric propulsion ship using solar charging, characterized in that the direct current by using an LC filter. The method of claim 1,
And a power management system electrically connected to the solar cell module, the storage battery, the charging control panel, and the propulsion motor to control the rotation speed of the propulsion motor and to control the charging, discharging, and distribution of the storage battery. Electric propulsion ship using solar charging, comprising. The method of claim 1,
An inverter for converting the DC power of the storage battery into an AC power to supply electric power to the general onboard ship;
A direct current generator for heating the ship and charging the storage battery;
A converter for adjusting the DC voltage for supplying power to the on-board general load and starting of the diesel engine provided in the DC generator;
A propulsion converter for converting power of the storage battery into driving power of the propulsion motor to supply power to the propulsion motor; And
Ground connection for charging the battery via onshore electrical equipment
Electric propulsion ship using solar charging, characterized in that it further comprises.

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