KR101283085B1 - Solar Power System with built in backup battery - Google Patents

Abstract

The present invention constitutes a solar power generation system that generates heat from a generator by driving the steam turbine by storing the heat energy absorbed from the heat energy absorber and reflecting the sun from the heliostat in a heat energy storage using air or generating steam using a steam generator. However, by adding one blower and bypass line, it is realized by five operation modes of heat energy storage, storage + power generation, power generation, power generation + regeneration and regeneration required by the system, and dual control using communication line and power line is possible. In addition, the present invention relates to a solar power generation system configured to be able to operate in the event of an external power cut or abnormality by embedding a backup battery.

Description

Solar Power System with built-in backup battery

The present invention constitutes a solar power generation system that generates heat from a generator by driving the steam turbine by storing the heat energy absorbed from the heat energy absorber and reflecting the sun from the heliostat in a heat energy storage using air or generating steam using a steam generator. However, by adding one blower and bypass line, it is realized by five operation modes of heat energy storage, storage + power generation, power generation, power generation + regeneration and regeneration required by the system, and dual control using communication line and power line is possible. In addition, the present invention relates to a solar power generation system configured to be able to operate in the event of an external power cut or abnormality by embedding a backup battery.

In general, solar power generates light reflected from mirrors installed on hundreds or thousands of heliostats on the ground and collected at the heat energy absorbers and rises to temperatures of hundreds or thousands of degrees. After it is generated, it is converted into power in a steam turbine and then converted into electricity in a generator.

In addition, various heat transfer media such as air, molten salt, and the like are used in the thermal power generation system, and the configuration of the system varies according to the characteristics of the heat transfer medium. In particular, solar power generation systems that use air as a heat transfer medium utilize two or more air blowers to control the amount and direction of air.

Conventional air-based solar thermal power generation system is operated by installing two or more blowers separately from the blower in order to control the amount and direction of the air.Increasing the number of blowers, the inverter and additional parts and construction for control There is a problem that the unit price increases.

Therefore, by installing a single blower and bypass line away from the use of a plurality of conventional blowers, there has been a demand for a method for reducing construction and construction costs and increasing operational efficiency and economic efficiency of a solar power system.

Since the battery is not installed inside the conventional solar power heliostart, it is impossible to control the external power source or control the heliostart in case of abnormality. Therefore, it is impossible to proactively cope with it, and the heliostart may not be able to control in the situation where high temperature is collected in the absorber during solar power operation. If a fire is very likely.

When power is supplied from an external UPS (uninterruptible power supply), it is possible to cope with external power interruption or abnormality, but there is a problem that the entire heliostart controller does not operate in case of UPS failure.

Communication method In addition, the central control computer communicates over the control of hundreds and thousands of heliostat controllers using a single communication line, but there is a problem in that the communication line of the entire group of the heliostat is disconnected when not in communication.

The problem to be solved by the present invention is to solve the above problems, by using a blower and a bypass line for controlling the amount and direction of one air heat energy storage, heat energy storage + power generation, power generation, power generation + regeneration And to implement the five operating modes of regeneration by providing a solar thermal power generation system with economical air heating medium that is easy to construct and manage.

Another problem to be solved by the present invention is that when the power is supplied from an external UPS, it is possible to deal with external power interruption or abnormality, but by providing a heliostart controller with a built-in backup battery to operate even in the event of a UPS failure It is to provide a solar thermal power system with a heat medium that can increase the.

Another problem to be solved by the present invention is to configure a solar power generation system using a solar power generation controller composed of a redundant communication line, provided with one blower and a bypass line in order to minimize the construction cost, to operate in five modes The present invention provides a solar power generation system that can improve reliability by redundancy using power lines when duplexing communication lines.

The problem solving means of the present invention is to store the solar energy absorbed by the heat energy absorber reflected by the heliostat in the heat energy storage using the air or to generate steam using the steam generator to drive the steam turbine to generate electricity in the generator It configures the system, and implements five operation modes of heat energy storage, heat energy storage + power generation, power generation, power generation + regeneration, and regeneration required by the system by using one blower and bypass line. It is to implement a solar power generation system with a built-in backup battery that can simplify the system by controlling the flow rate.

Another object of the present invention is to implement a solar power generation system with a built-in backup battery so that the heliostart controller can operate even in the event of a UPS failure in a solar power generation system using air as a medium.

Another problem solving means of the present invention is to configure a solar power generation system using a solar power generation controller composed of a redundant communication line, to minimize the construction cost is provided to operate in five modes with one blower and bypass line In addition, when the communication line is doubled, the power line is doubled to greatly reduce the construction cost and maintenance cost, and to implement a solar power generation system that can improve reliability.

The present invention enables the implementation of a solar thermal power generation system using a single air blower and a bypass line in a solar thermal power generation system using air as a medium, and thus, thermal energy storage, thermal energy storage + power generation, power generation, power generation + regeneration, Five modes of regeneration can be implemented, flow control for each operation mode is easy, and there is an advantageous effect that can greatly reduce the installation and maintenance costs according to the simplification of the system.

Another effect of the present invention is to provide a heliostart controller with a built-in backup battery to operate in the event of a power failure or abnormality in the case of receiving power from an external UPS, but also to operate in the event of a UPS failure to increase reliability. There is.

Another effect of the present invention is to configure a solar power generation system using a solar power generation controller composed of a redundant communication line, in order to minimize the construction cost is provided to operate in five modes with one blower and bypass line, When redundancy of communication lines, redundancy using power lines is used to significantly reduce construction and maintenance costs and improve reliability.

1 illustrates a 'storage + power generation' mode in a solar power system according to the present invention.
Figure 2 shows the 'generation + regenerative' storage mode in the solar power system according to the present invention.
Figure 3 shows a 'regenerative' mode in the solar power system according to the present invention.
4 illustrates a communication line of a solar power generation system having a redundant communication line according to the present invention.
5 is a configuration diagram of a solar thermal power system according to the present invention.
Figure 6 is a block diagram showing the operation of the backup battery of the solar power heliostart controller according to the present invention.
<Brief Description of Drawings>
210: heliostat 220: heat energy absorber
230: thermal energy storage unit 240: steam generator
250: steam turbine 260: generator
270: blower 280: bypass line
310: storage mode 320: storage + power generation mode
330: power generation mode 340: power generation + regenerative mode
350: regenerative mode
500: heliostat controller 510: external power
520: actuator 530: sensor
540: communication unit 550: control unit
560: power supply unit 570: voltage control unit
580: backup battery 600: host controller

Hereinafter, the present invention will be described in detail.

Solar thermal power generation system using the air heat medium according to the present invention is stored in the heat energy storage using the air reflected by the heliostat in the heat energy absorber or by using a steam generator to generate steam to drive the steam turbine to generate electricity in the generator It consists of a solar power generation system that produces the power supply, and implements five operation modes of heat energy storage, heat energy storage + power generation, power generation, power generation + regenerative and regeneration required by the system using one blower and bypass line. It is easy to control the flow rate for each operation mode, and it is configured to reduce the installation and maintenance cost of the solar thermal power generation system that uses air as a medium to simplify the system.

In addition, the present invention is to implement a solar power generation system with a built-in backup battery so that the heliostart controller can operate even in the event of a UPS failure in the solar power generation system using the air medium.

In addition, the present invention is to configure a solar power generation system using a solar power generation controller composed of a redundant communication line, in order to minimize the construction cost is provided so as to operate in five modes with one blower and bypass line, communication line By redundancy by using power line, it is possible to realize solar power generation system with built-in backup battery which can greatly reduce construction cost and maintenance cost and improve reliability. Look at a specific embodiment of the present invention.

<Examples>

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will now be described with reference to the drawings. The configuration and operation of five operation modes of storage, storage + power generation, power generation, power generation + regeneration and regeneration according to the present invention are shown.

The solar thermal power generation system according to the present invention has a heliostat 210 for reflecting solar energy to a heat energy absorber, a heat energy absorber 220 for absorbing heat energy by receiving solar heat collected by the heliostat 210, and a heat energy absorber 220. A heat energy store 230 for transferring and storing the absorbed heat energy through a pipe which is a moving passage of heated air, a steam generator 240 for generating steam using the heated air, and a steam generator 240 It is composed of a steam turbine 250 for driving the rotary shaft of the generator 260 by using the steam generated by the generator, and a generator 260 for producing electricity by the rotation of the steam turbine 250.

According to the present invention, a plurality of air blocking and opening valves are fixedly installed at one side of a bypass line, a blower, and a pipe to efficiently operate the five operation modes of storage, storage + power generation, power generation, power generation + regeneration, and regeneration. It is.

The blower is fixedly installed between the air pipe located at the bottom of the heat energy reservoir 230 and the air pipe located at the bottom of the steam generator 240 to blow air to the heat energy reservoir 230 and / or the heat energy absorber 220. Consists of.

The bypass line 280 is connected to the air pipe located at the bottom of the thermal energy storage unit 230 and the air pipe between the steam generator and the blower is configured to be used in the storage mode or the storage + power generation mode.

In the solar power generation system using air as a heat medium according to the present invention, a valve is provided to block and / or open the air flowing into the pipe according to each mode in the pipe through which the air flows to perform the operation in five operation modes. It is installed.

More specifically, the heat reflected by the heliostat 210 reflecting the sunlight is collected in the heat energy absorber 220, the air is heat-exchanged through the heat energy absorber 220, heat exchanger 230 and the steam generator ( 240 is supplied to the heat source, the supplied heat source is stored through the heat energy reservoir 220 or is supplied to the steam generator 240 to produce steam is supplied to the steam turbine 250, the generator to the steam turbine 250 It is configured to rotate the 260 to produce electricity, the blower 270 serves to circulate the air in the pipe, the inside of the pipe is operated at a pressure lower than atmospheric pressure by the flow of air.

The heat energy absorber 220 is composed of a porous ceramic, and is configured to be heat-exchanged while the air passes through the collected heat energy absorber 220 is converted to air of a high temperature.

The air converted to a high temperature is supplied to the thermal energy reservoir 230 to store the thermal energy of the heated air, or is supplied to the steam generator 240 is configured to heat the steam generator to generate steam.

The heat energy reservoir 230 may store heat energy heated by heat exchanged from the heat energy reservoir 230 while the air supplied from the heat energy absorber 220 passes through the heat energy reservoir 220, and backflows the air if necessary. By using the heat energy stored in the thermal energy storage unit 230 to heat the air to supply to the steam generator 240 may be configured to generate a steam by heating the steam generator.

The steam generator 240 is configured to generate a high temperature steam by using the heat of the air supplied from the thermal energy reservoir 230, the generated steam is supplied to the steam turbine 250, driving the steam turbine As a rotating shaft of the generator rotates to produce electricity.

The steam turbine 250 is a device that transfers power to the generator 260 by driving (rotating) the steam turbine with steam supplied from the steam generator 240.

The generator 260 is configured to produce electricity by rotating the rotating shaft of the generator by the power transmitted from the steam turbine 250.

The blower 270 is used to control the flow of air used in the solar power system, and is configured to control the flow of air in accordance with the state of the system.

The control mode of the solar power generation system according to the present invention consists of five operation modes of storage 310, storage + power generation 320, power generation 330, power generation + regenerative 340 and regenerative 350, solar energy In order to make the best use of it, it is configured to switch freely to each operation mode according to the amount of insolation during operation.

'Storage 310' mode is a mode in which heated air supplied from the heat energy absorber 220 is supplied to the heat energy reservoir 230 to store heat energy in the heat energy reservoir 230.

In order to control the flow of the heated air stored in the heat energy reservoir 230 is configured to be input to the blower through the bypass line 280 connecting the rear end of the blower 270 at the bottom of the heat energy reservoir 230. .

The blower 270 is configured to adjust the amount of stored energy by controlling the flow of heated air to control the amount of heated air that is moved to the thermal energy store 230.

1 is a view illustrating the operation principle of the 'storage + power generation 320' mode according to the present invention, the 'storage + power generation 320' mode is an operating mode when the amount of insolation is higher than the conditions set in the system, a heat energy absorber By supplying the heated air supplied from the 220 to the steam generator 240 to heat the steam generator 240 to generate steam, supply the generated steam to the steam turbine to convert into power, the steam turbine of the generator By rotating the rotating shaft to produce electricity, at the same time the air supplied from the heat energy absorber 220 is supplied to the heat energy reservoir 230, the blower at the bottom of the heat energy reservoir 230 to control the flow of the stored air is stored Through the bypass line 280 connecting the rear end of the air is configured to be input to the blower 270.

By the operation of the blower 270 and the control valve is configured to control the amount of storage + power generation energy by adjusting the amount of air.

In the present invention, the 'power generation 330' mode is the most common operation mode, the heat reflected by the heliostat 210 is heat-absorbed by the heat energy absorber 220, the heat energy absorbed by the heat energy absorber 220 as heat energy The heated air is supplied to the steam generator 240, and the generated steam is supplied to the steam turbine 250 to drive the steam turbine, and rotates the generator 260 by the power of the steam turbine to produce electricity. .

1 to 3, the blower 270 is configured to control the amount of energy generated by controlling the flow of heated air in the pipe by controlling the wind speed.

2 illustrates the operation principle of the 'generation + regeneration 340' mode according to the present invention, the 'generation + regeneration 340' mode is stored in the heat source and the heat energy storage 230 of the heat energy absorber 220. As an operation mode using a heat source at the same time, after the air supplied from the heat energy absorber 220 is supplied to the steam generator 240 to generate steam, the steam is supplied to the steam turbine 250 to drive the steam turbine, After driving the rotating shaft of the generator 260 to produce electricity, and at the same time the heat energy stored in the heat energy reservoir 230 is supplied to the steam generator 240 through the air pipe to generate steam, and then to the steam turbine 250 It is configured to produce electricity in the generator 260 after supplying steam to convert to power.

In Figure 2, by controlling the operation of the blower 270 and the control valve to control the amount of air flow is configured to vary the amount of thermal energy in the power generation + regenerative mode.

3 illustrates the operation principle of the 'regenerative 350' mode according to the present invention, and the 'regenerative 350' mode is an operation mode when the amount of insolation is insufficient such that the steam turbine 250 cannot be operated. After the steam is generated by supplying the thermal energy stored in the thermal energy storage unit 230 to the steam generator 240 through the air and supplied to the steam turbine 250 and converted into power, the generator 260 rotates to produce electricity Mode.

The air bypass line 280 is used in the 'storage' mode and the 'storage + power generation' mode, and in order to implement the storage mode using one blower, the existing storage mode is implemented using an additional blower. Bypass line 280 is installed to configure a system using a single blower.

Fixed installation of one blower and bypass line eliminates the need for expensive inverters, blowers, motors, etc. to control additional blowers, thereby reducing construction costs and installation space. Minimize operational costs.

The control of the blower is the core of the control of the solar power generation system. It is to control the amount of air inside the system.The heat energy absorber and the heat energy saver are controlled by the temperature set in the system memory. There is a risk of breakage or fire due to exposure to the above high temperature, by changing the control unit to a single blower that was previously operated by two blowers, it is possible to reduce the control element, it is possible to increase the safety and reliability of the system.

Figure 4 is to use a separate communication line and power line to increase the efficiency and reliability of the communication of the solar power generation system with a heat medium consisting of one bypass line and one blowing fan designed according to the present invention It shows a duplicated communication line.

The present invention monitors a plurality of heliostat controllers, and transmits and controls the control signals from the central control computer. The control signal (command) is transmitted to the heliostat controller through power line communication by sending data necessary for the heliostat control from the central control computer. By transmitting, each heliostat controller is configured to be controlled independently.

Solar power generation controller composed of a redundant communication line according to the present invention includes a plurality of heliostat controller and a central control computer connected via a communication line and a power line, the heliostat controller is an azimuth angle and / or capable of collecting as much heat from the central control computer as possible Or it controls the heliostat by receiving a control signal for performing a command such as changing the altitude angle.

The central control computer transmits control signals (data) necessary for the operation of the heliostat controller through a communication line or power line communication, and transmits an operation control command signal for each heliostat controller. At this time, the general communication is made using a communication line, and if it is impossible to control due to an abnormality of the communication line, it is configured to communicate using a power line.

In case of abnormality in the communication part of the heliostat controller or communication line, communication is replaced by power line communication, and communication is performed. The central control computer is configured to receive and demodulate a heliostat operation control command signal transmitted through a power line.

The demodulated heliostat operation control command signal is configured to be transmitted to the actuator unit through the power line communication unit, and is configured to control the heliostat azimuth and / or altitude angle by driving the actuator unit by the heliostat operation control command signal output from the power line communication unit.

The heliostat controller monitors the state of the heliostat and transmits it to the central control computer through power line communication, and executes a micom for controlling each technical configuration by executing a control program mounted in a memory. Equipped.

5 is a block diagram showing the configuration of the solar power helio start controller 500 according to the present invention, the central control computer 600 and the hundreds, thousands of helio start controller 500 is the central through the communication unit 540 Receives command and data for operation from the control computer 600 or gives status data, and calculates and controls the movement of the heliostart in the control unit 550, gives a command to the actuator unit 520 pan / tilt of the heliostart Drives the operation, the sensor unit 530 transmits information on the wrong operation and position data to the control unit 550, the power required for the helio start controller 500 is supplied from an external power source 510 power supply unit 560 Is supplied through the heliostart controller 500 or configured to be used for charging the battery 580.

Figure 6 shows the operation of the operation of the backup battery 580 according to the present invention, the charge of the backup battery by adjusting the voltage and current according to the charging and discharging characteristics of the battery in the voltage control unit 570 when a general external power supply In case of abnormality or interruption of external power, it operates by using backup battery as power. In the normal state by checking the battery's charge amount using sensor to measure battery charge, It is configured to maintain full charge at all times by receiving power.

The charging voltage is set to DC 12V to minimize the configuration and volume of the battery.

The power of the heliostart controller 500 operates at a DC 24V voltage higher than that of the backup battery, and for driving, the voltage regulator 570 is built in such a way that the 12V charged in the backup battery (battery) can be boosted to 24V. The voltage regulator is configured to operate at a voltage of 12V.

In this case, even if the voltage of the battery is low, it can be applied, and it is possible to minimize the configuration of the backup battery (battery battery) because it is configured to charge at a low voltage, and to minimize the size of the heliostart controller 500. The cost savings can be significant, considering that the number of solar power heliostarts is usually hundreds or thousands, since the cost of installing the backup battery and the maintenance cost can be reduced by half.

The present invention constitutes a solar power generation system that generates heat from a generator by driving the steam turbine by storing the heat energy absorbed from the heat energy absorber and reflecting the sun from the heliostat in a heat energy storage using air or generating steam using a steam generator. However, by adding one blower and bypass line, it is realized by five operation modes of heat energy storage, storage + power generation, power generation, power generation + regeneration and regeneration required by the system. It is highly industrially available because it is configured to be operable and can reduce installation and maintenance costs by providing a solar power generation system capable of dual control using communication lines and power lines.

Claims (5)

In solar thermal power generation system using air as a medium,
A heliostat 210 for reflecting solar energy to a heat energy absorber;
A heat energy absorber 220 that receives heat collected from the heliostat and absorbs heat energy;
A heat energy store 230 for transferring and storing heat energy absorbed by the heat energy absorber through a pipe;
The blower is fixedly installed between the air pipe located at the bottom of the heat energy store and the air pipe located at the bottom of the steam generator, and is configured to blow air through the pipe to the heat energy store and the heat energy absorber or to the heat energy store or the heat energy absorber. 270);
A steam generator 240 for generating steam by using heated air transferred through a pipe from the heat energy absorber or the heat energy store;
Steam turbine 250 for driving the rotary shaft of the generator using the steam generated by the steam generator;
Generator 260 for producing electricity by the rotation of the steam turbine;
A central control computer for receiving a signal transmitted from each heliostat controller and transmitting a control signal to each heliostat; And
Communication lines and power lines for exchanging signals between the heliostat controller and the central control computer; And
It is fixedly installed between the air pipe located at the bottom of the heat energy store and the air pipe between the steam generator and the blower to generate electricity from the storage mode for storing the heated air in the heat energy store or the heated air supplied from the heat energy absorber due to the large amount of insolation. And a solar thermal power generation system having a backup battery 580 composed of a bypass line 280 for use in a storage + power generation mode for storing heated air in a thermal energy reservoir. delete delete The method according to claim 1,
The backup battery has a sensor for measuring the charging amount of the backup battery, the solar power generation with air as the heat medium with the backup battery, characterized in that configured to maintain a full charge state using the power supplied from the normal state system. The method according to claim 1,
Communication between the heliostat controller and the central control computer is used to transmit a signal by selecting one of the communication line and the power line in order to minimize data processing speed and error, and the other is to be separated into the line receiving the signal A solar power generation system using air as a heat medium with a backup battery characterized in that the configuration.

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