KR20030084085A - Apparatus and method for controlling power controller for solar power generation - Google Patents

Abstract

PURPOSE: A controller of a power control unit for solar photovoltatic power generation and a controlling method thereof are provided to prevent a damage of battery due to the over-charge and the over-discharge by checking periodically voltages of a solar cell and the battery. CONSTITUTION: A controller of a power control unit for solar photovoltatic power generation includes a charging portion(10), an output portion(15), a sensing portion(35), and a control portion(20). The charging portion(10) supplies or cuts off the output power of a solar cell(5) to a battery(25). The output portion(15) supplies or cuts off the output power of the battery(25) to a load(30). The sensing portion(35) senses the current and the voltage on a path between the solar cell(5) and the load(30). The control portion(20) receives the measured current value and the measured voltage value of the sensing portion(35) in order to control the charging portion(10) and the output portion(15).

Description

Control device and control method of solar power regulator {APPARATUS AND METHOD FOR CONTROLLING POWER CONTROLLER FOR SOLAR POWER GENERATION}

The present invention relates to a control device and a control method of a solar power regulator for stable power supply to the protection and load of the storage battery used in the solar power system.

In order to overcome the crisis caused by the limited amount of oil resources and regional bias due to two oil surges in the 1970s, ground-based photovoltaic power generation system as a new future energy source to replace oil was developed around developed countries. As a result, it is being developed for special purposes such as power in remote areas where portable power is not available or portable and military power.

This photovoltaic system is achieved by converting solar energy into electrical energy and supplying it to the load to be used.

Photovoltaic power generation systems are mainly developed in two forms. One is the grid-connected photovoltaic power generation system that supplies the DC power generated from the solar cell to the commercial power line in real time through the inverter, and the other is the direct current generated from the solar cell so that it can be used even at night when no power is generated. It is a stand-alone photovoltaic system that stores power in a battery through a charger and supplies it to individual loads in the form of direct current or alternating current.

1 is a schematic block diagram of a conventional standalone solar power system.

Referring to FIG. 1, a conventional standalone photovoltaic system will be described. A solar cell 5 converting incident solar energy into electric power through a solar cell array; A charging unit 10 which charges the storage battery 25 with the power output from the solar cell 5; A storage battery 25 storing power output from the charging unit 10; An output unit 15 for converting the power stored in the storage battery 25 into power suitable for the load 30 and outputting the converted power; The controller 20 is configured to control the charging unit 10 and the output unit 15 to control charging the power to the storage battery 25 and outputting the power.

In the conventional photovoltaic power generation system configured as described above, when the power output from the solar cell 5 is directly supplied to the load 30, the intensity of the solar light is changed according to weather and time zone so that the constant power is applied to the load 30. The battery 25 was used because it could not be supplied.

Referring to the operation of the conventional photovoltaic power generation system, when solar energy is converted into electrical energy in the solar cell 5 and power is generated, the controller 20 controls the charging unit 10 to store power in the storage battery 25. Save it to In addition, when power is required for the load 30, the controller 20 controls the output unit 15 to supply power stored in the storage battery 25 to the load 30.

In order to supply stable power to the load as described above, the conventional photovoltaic power generation system stores or discharges power stored in the storage battery 25 according to weather and time zones in the solar cell 5.

That is, when the intensity of the sunlight is strong, excessive power is output to the load 30, so that power is stored in the storage battery 25 so that the excessive power is not supplied to the load 30, and when the intensity of sunlight is weak, the load ( Since the power necessary for 30 is not supplied, the electric power stored in the storage battery 25 is discharged to reinforce as much power as is insufficient.

As described above, the conventional photovoltaic power generation system is designed to supply stable power to the load 30 using the storage battery 25. However, when the intensity of the solar light continues to change irregularly, the storage battery 25 is operated at the operating point ( Charging and discharging may be repeated based on the reference voltage of charging and discharging).

In addition, when the battery 25 changes from charging to discharging or from discharge to charging on the basis of the operating point, the charging and discharging may be repeatedly performed at the operating point due to the change in voltage generated due to the internal resistance of the battery.

This repetitive charging and discharging has a problem of reducing the stable operation of the system and shortening the life of the battery.

In addition, when the battery is used for a long time and its function is impaired, the battery is rapidly charged and discharged, and thus, there is a risk that the load is not supplied to a stable power supply, thereby damaging the load.

Therefore, the technical problem to be achieved by the present invention is to protect the storage battery connected to the solar power regulator from repeated charging and discharging, overcharge and overdischarge, and to provide a stable power supply to the load of the solar power regulator It is to provide a control device and a control method.

1 is a schematic block diagram of a conventional solar power system

Figure 2 is a block diagram of a control device for a solar power regulator according to an embodiment of the present invention

Figure 3 is a detailed block diagram of a control unit provided in the control device of the power regulator for photovoltaic power generation according to an embodiment of the present invention

Figure 4 is an exemplary view showing an operating state of the control device of the solar power regulator for power generation according to an embodiment of the present invention.

5 is a flow chart of a control method of the power regulator for photovoltaic power generation according to the present invention.

The control device of the solar power regulator for achieving the above technical problem, relates to a power regulator for supplying a load by adjusting the power output from the solar cell, to supply or cut off the power output from the solar cell to the storage battery A charging unit; An output unit configured to supply or cut off power output from the storage battery to a load; A sensing unit measuring current and voltage on all paths from the solar cell to the load; And control means for controlling the operation of the charging unit and the output unit by receiving the current value and the voltage value measured from the sensing unit.

In the present invention, the control device of the power regulator, voltage current display unit for displaying the current and voltage value on the path; And an LED display for displaying the operating state of the battery.

In the present invention, the control means includes: a voltage current value memory for temporarily storing a voltage value and a current value for each measurement part output from the sensing unit; A reference voltage value storage unit for storing reference voltage value data for preventing damage to the storage battery corresponding to “overcharge preventing voltage”, “charge resuming voltage”, “over discharge preventing voltage”, and “output resume voltage”; A comparator for comparing the measured voltage and the reference voltage output from the voltage current value memory and the reference voltage value storage unit with each other; The measured voltage and current values temporarily stored in the voltage-current value memory are read out and alternately outputted to the voltage-current display part at predetermined time intervals, and the state of the battery protection device is "overcharged" and "charging" according to the result of comparison in the comparator. A microcomputer which determines four of "overdischarge" and "output" and outputs corresponding data values to the LED display unit; And a counter for counting the alternating output time of the voltage current display unit.

In the present invention, the voltage current display unit, it is preferable to display the current and voltage values measured on the path using a 7-segment or LCD.

In the present invention, the voltage current display unit, the number of LEDs corresponding to the device on the path to be measured, but the LED is preferably turned on alternately.

In the present invention, it is preferable that the reference voltage value stored in the reference voltage value storage unit determines the overcharge prevention voltage value, the charge resumption voltage value, the overdischarge prevention voltage value, and the output resume voltage value by using hysteresis. .

On the other hand, the control method of the photovoltaic power regulator for achieving the above technical problem, relates to a power control method for supplying to the load by adjusting the power output from the solar cell, (a) the voltage of the storage battery measured by the sensing unit Transmitting to the voltage current value memory; (b) reading and comparing the measured voltage with a reference voltage stored in a reference voltage value storage unit; (c) determining a state of a current battery by receiving the comparison result; (d) discharging the power of the battery to the load by turning off the charging unit in the overcharged state according to the result determined by the above; (e) if the state of being charged, according to the result determined above, turning off the charging unit to charge the storage battery power from the solar cell; (f) charging the power of the battery from the solar cell by turning off the output unit in the over-discharge state according to the result determined by the above; And (g) outputting power of the battery to the load by turning on the output unit when the output state is output according to the result determined by the above, wherein the reference voltage is a voltage value for setting overcharge, charging, overdischarge, and output. It is characterized by that.

In the present invention, the step (d) of discharging the power of the battery to the load further comprises the step of lighting the LED corresponding to the overcharge by outputting an LED lighting signal indicating that the microcomputer "overcharge" to the LED display unit. desirable.

In the present invention, the step (e) of charging the power of the battery from the solar cell further comprises the step of lighting the LED corresponding to the charging by outputting an LED light signal indicating that the microcomputer is "charging" to the LED display unit. It is desirable to.

In the present invention, the step (f) of charging the power of the storage battery from the solar cell further comprises the step of lighting the LED corresponding to the over-discharge by outputting an LED lighting signal indicating that the microcomputer "over-discharge" to the LED display unit It is desirable to.

In the present invention, the step (g) of outputting the power of the battery to the load further comprises the step of lighting the LED corresponding to the output by outputting an LED lighting signal indicating that the microcomputer is an "output" in the LED display unit. desirable.

In the present invention, the control method of the power regulator, if the storage battery is damaged, the sensing unit measuring the voltage output from the solar cell; Determining whether the measured voltage is less than or equal to an initial voltage; Determining whether the measured voltage is greater than or equal to an output resuming voltage; And turning on the output unit when the measured voltage decreases below the initial voltage and above the output resumption voltage according to the result determined by the above.

Hereinafter, the present invention will be described in detail with reference to examples, and detailed description will be made with reference to the accompanying drawings to help understand the present invention. However, embodiments according to the present invention can be modified in many different forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. Embodiments of the present invention are provided to more clearly and easily describe the present invention to those skilled in the art. Like reference numerals in the drawings refer to like elements.

Figure 2 is a block diagram of a control device of a power regulator for photovoltaic power generation according to an embodiment of the present invention.

Referring to FIG. 2, the battery protection device according to the present invention includes a charging unit 10 which controls supply or interruption of power output from the solar cell 5 to the storage battery 25 through a transistor (not shown) provided therein. )Wow; An output unit 15 for controlling the supply or interruption of the power output from the storage battery 25 to the load 30 through a transistor (not shown) provided therein; A sensing unit 35 measuring current and voltage on all paths from the solar cell 5 to the charging unit 10, the charging unit 10 to the output unit 15, and the output unit 15 to the load 30; Receives the current value and the voltage value output from the sensing unit 35 to control the operation of the charging unit 10 and the output unit 15, displays the measured current value and the voltage value, and displays the operation state of the battery protection device. A control unit 20; A power switch 55 for turning on and off the power supply of the battery protection device; A voltage current display unit 45 for alternately displaying current and voltage values on each path transmitted from the control unit 20 by using two columns of 7-segments; It includes an LED display unit 40 for displaying the operation state of the battery protection device transmitted from the control unit 20 through the LED in four kinds of "overcharge", "charging", "over-discharge", "output".

The detailed configuration of the controller for controlling the control device of the power regulator is described with reference to FIG. 3 as follows.

3 is a detailed block diagram of a controller provided in a control apparatus of a solar power regulator according to an embodiment of the present invention.

Referring to FIG. 3, the controller 20 includes: a voltage current value memory (RAM) 20c for temporarily storing voltage values and current values for each measurement part output from the sensing unit 35; The reference voltage value data for storing the reference voltage value data for preventing the burnout of the storage battery 25 is stored corresponding to "overcharge prevention voltage", "charge resumption voltage", "over discharge prevention voltage", and "output resume voltage", respectively. Part (ROM: 20d); A comparator 20b for comparing the measured voltage and the reference voltage output from the voltage current value memory 20c and the voltage value storage unit 20d with each other and outputting the result; The measured voltage and current values temporarily stored in the voltage current value memory 20c are read out, alternately outputted to the voltage current display 45 at predetermined time intervals, and the state of the battery protection device according to the comparison result of the comparator 20b. A microcomputer 20a for judging four of "overcharge", "charging", "over-discharge", and "output" and outputting corresponding data values to the LED display unit 40; A counter 20e for counting the alternating output time of the voltage current display section 45 is included.

The voltage current value memory 20c, the reference voltage value storage unit 20d, the comparator 20b, and the counter 20e, which are detailed configurations of the control unit 20, are partially configured to clarify the function performed by the microcomputer 20a. As a separate element, the microcomputer 20a can actually perform alone.

The display method of the voltage current display unit 45 and the LED display unit 40 will be described with reference to FIG.

Figure 4 is an exemplary view showing the operating state of the control device of the power regulator for photovoltaic power generation according to an embodiment of the present invention.

As shown in FIG. 4, the state of the battery protection device represented by the LED display unit 40 is divided into “overcharge”, “charging”, “over-discharge”, and “output”, respectively, so that the LED is turned on according to each state. It is preferable.

In addition, the voltage current display unit 45 alternately displays the current and the voltage of the solar cell, the storage battery, and the load in predetermined time units. In order to display the current and voltage of the solar cell, the storage battery, and the load, a total of six columns of display units are required. However, when each device is displayed alternately over a predetermined time, the entire current and voltage can be represented by the display unit of two columns. The display of the alternating state is performed by turning on LEDs corresponding to "solar cell", "storage battery", and "load".

In the above, the display of current and voltage is preferably performed using a 7-segment 50, which is a display element arranged in the form of numbers and letters using LEDs, or using a liquid crystal display (LCD) (not shown).

An operation of the battery protection device according to the present invention having the above configuration will be described in detail with reference to FIGS. 2, 3, and 4.

First, an operation of displaying the measured voltage and the current through the voltage current display unit 45 will be described.

The sensing unit 35 measures voltage and current from the solar cell 5, the storage battery 25, and the load 30, and applies the voltage and the current to the control unit 20. The voltage and current values measured by the sensing unit 35 are temporarily stored in the voltage current value memory 20c and then applied to the microcomputer 20a. The microcomputer 20a alternately measures the measured voltage and current of the solar cell 5, the measured voltage and current of the storage battery 25, and the measured voltage and current of the load 30 according to the counting time of the counter 20e. Output to (45).

For example, if the shift time is set to 10 seconds, the microcomputer 20a outputs the solar cell 5 output from the voltage current value memory 20c whenever the counter 20e counts more than 10 seconds. The voltage and current values of the storage battery 25 and the load 30 are alternately output at intervals of 10 seconds to the voltage current display unit 45.

In addition, a signal for turning on the corresponding LED is also output at the same time to display which of the current voltage and current value corresponds to "solar cell", "storage battery", or "load".

The voltage current display unit 45 receives the voltage and the current value output from the microcomputer 20a and turns on the 7-segment 50 to display the current and the voltage value. In addition, the LED light signal is received to select one of the "solar cell", "storage battery", "load" to turn on the LED.

In addition, an operation for preventing damage to the storage battery 25 will be described.

For example, if the storage battery 25 is damaged when the battery 25 is charged to 14.5 V or more and discharged to 10 V or less, the overcharge preventing voltage is 14.5 V, and the over discharge preventing voltage is 10 V. If the battery 25 resumes charging at 12.5 V or less and resumes output to the load 30 at 12 V or more, the charge resume voltage is 12.5 V and the output resume voltage is 12 V. The reason why the overcharge protection voltage and the charge resuming voltage, the overdischarge prevention voltage and the output resume voltage are 2 V is the voltage drop due to the internal resistance of the battery 25. That is, the hysteresis of about 2V is set to prevent malfunction due to the internal resistance of the battery.

Each of the above voltages is stored in the reference voltage value storage unit 20d.

In order to prevent damage to the storage battery 25, the comparator 20b is measured from the sensing unit 35 and temporarily stored in the voltage current value memory 20c, the voltage of the solar cell 5, the storage battery 25, and the load 30. Read the value. The comparator 20b compares the reference voltage value stored in the reference voltage value storage unit 20d with the voltage value read from the voltage current value memory 20c and outputs the result to the microcomputer 20a.

Hereinafter, the state of the storage battery 25 will be described by setting four examples of overcharging, charging, overdischarging, and output, respectively.

First, overcharge is as follows.

If the voltage charged from the solar cell 5 to the storage battery 25 is, for example, 15 V, the comparator 20b compares with the overcharge protection voltage corresponding to 14.5 V stored in the reference voltage value storage unit 20d. It outputs to the microcomputer 20a that the overcharge protection voltage has been exceeded. The microcomputer 20a recognizes that the state of the current storage battery 25 is overcharged, so that the transistor of the charging unit 10 is turned off so that the storage battery 25 is no longer charged. In order to display the current state, the LED display unit 40 outputs an LED light signal indicating that the state of the current storage battery 25 is in an overcharge state. The LED display unit 40 receives the LED light signal and turns on the LED corresponding to "overcharge".

Second, charging is as follows.

When the voltage charged in the storage battery 25 is no longer charged by the operation of the charging section 10 and starts to discharge, the voltage drops gradually from 15V. Thus, when it reaches 12.5 V or less, the comparator 20b compares the charging resumption voltage corresponding to 12.5 V stored in the reference voltage value storage unit 20d and outputs to the microcomputer 20a that the current voltage corresponds to the charging resumption voltage. The microcomputer 20a recognizes that the current state of the storage battery 25 is capable of charging and turns on the transistor of the charging unit 10 to be charged by the storage battery 25. In order to display the current state, the LED display unit 40 outputs an LED light signal indicating that the state of the current storage battery 25 is being charged. The LED display unit 40 receives the LED light signal and turns on the LED corresponding to "charging".

Third, over discharge is as follows.

When the voltage charged in the battery 25 output to the load 30 is 9.5 V, for example, the comparator 20b compares the load with the over-discharge prevention voltage corresponding to 10 V stored in the reference voltage value storage unit 20d. Output to the microcomputer 20a that the discharge voltage outputted at 30 is less than the overdischarge prevention voltage. The microcomputer 20a recognizes that the state of the current storage battery 25 is over discharge, and turns off the transistor of the output unit 15 so that it is no longer discharged to the load 30. In order to display the current state, the LED display unit 40 outputs an LED light signal indicating that the state of the current storage battery 25 is an over discharge state. The LED display unit 40 receives the LED light signal and turns on the LED corresponding to "over-discharge".

Fourth, the output is as follows.

The voltage charged in the battery 25 is no longer discharged by the operation of the output unit 15, and when it starts to be charged, the voltage gradually rises from 9.5V. Thus, when it reaches 12 V or more, the comparator 20b compares the output resume voltage corresponding to 12 V stored in the reference voltage value storage unit 20d and outputs to the microcomputer 20a that the current voltage corresponds to the output resume voltage. The microcomputer 20a recognizes that the current state of the storage battery 25 is capable of discharging, and turns on the transistor of the output unit 15 so that power is transferred to the load 30. In order to display the current state, the LED display unit 40 outputs an LED light signal indicating that the state of the current battery 25 is being output to the load 30. The LED display unit 40 receives the LED light signal and turns on the LED corresponding to the “output”.

In the above, when the battery 25 is used for a long time and its function is impaired, rapid charging and discharging is performed. Therefore, even when the battery 25 is controlled by the above operation, the transistor of the output unit 15 repeats the on / off operation to the load. There is a risk of damaging even the load 30 because it is not a stable power supply. Therefore, the microcomputer 20a resets the output unit 15 of the power regulator controller when the output unit 15 is turned off due to the discharge of the storage battery 25 during the operation of the power regulator. Wait until the voltage outputted from the voltage without the sunlight (for example, 5 V, the initial voltage hereinafter) rises above the "output resume voltage" of the output unit 15, and then outputs the output unit 15 ) Is on.

Hereinafter, a control method of a solar power regulator according to the above configuration will be described with reference to FIG. 5.

5 is a flowchart of a control method of a power regulator for photovoltaic power generation according to the present invention.

Referring to FIG. 5, the battery protection method according to the present invention transmits the voltage of the battery 25 measured by the sensing unit 35 to the voltage current value memory 20c (S100).

The microcomputer 20a reads the measured voltage and the reference voltage stored in the reference voltage value storage unit 20d and compares them through the comparator 20b (S200).

The microcomputer 20a receives the comparison result and determines the current state of the storage battery (S300).

According to the determination result, when the overcharge state, the microcomputer 20a turns off the charging unit 10 (S400).

When the microcomputer 20a turns off the charging unit 10, the storage battery 25 discharges the charged power (S500).

The microcomputer 20a outputs an LED lighting signal indicating “overcharge” to the LED display unit 40 to light the LED corresponding to overcharge (S600).

According to the determination result, if the charging state of the microcomputer 20a turns on the charging unit 10 (S700).

When the microcomputer 20a turns on the charging unit 10, the storage battery 25 charges power (S800).

The microcomputer 20a outputs an LED lighting signal indicating “charging” to the LED display unit 40 to light the LED corresponding to charging (S900).

According to the determination result, if the output state, the microcomputer 20a turns on the output unit 15 (S1000).

When the microcomputer 20a turns on the output unit 15, the storage battery 25 discharges power (S1100).

The microcomputer 20a outputs an LED lighting signal indicating “output” to the LED display unit 40 to light an LED corresponding to the output (S1200).

According to the determination result, the microcomputer 20a turns off the output unit 15 in the over discharge state (S1300).

When the microcomputer 20a turns off the output unit 15, the storage battery 25 charges power (S1400).

The microcomputer 20a outputs an LED lighting signal indicating "over-discharge" to the LED display unit 40 to light up the LED corresponding to the over-discharge (S1500).

When the LED display unit 40 outputs the LED lighting signal, the sensing unit 35 measures the voltage output from the solar cell 5 (S1600).

The voltage output from the solar cell 5 should rise from the initial voltage or less.

When the sensing unit 35 measures the output voltage of the solar cell 5, the microcomputer 20a determines whether the measured voltage is less than or equal to the initial voltage (S1700).

According to the result of determination, if the measured voltage is less than the initial voltage, the process proceeds to the step of determining whether the measured voltage to be described later is more than the output restart voltage (S1800), and if the measured voltage is more than the reference voltage, the voltage of the solar cell 5 The measurement proceeds to step S1600.

If the output voltage of the solar cell 5 is less than or equal to the initial voltage, the microcomputer 20a determines whether the measured voltage rising due to solar heat is equal to or greater than the output resuming voltage (S1800).

According to the determination result, if the measured voltage is equal to or higher than the output resume voltage, the microcomputer 20a proceeds to step S1000 of turning on the output unit 15, and if the measured voltage is equal to or lower than the output resume voltage, the solar cell 5 Proceeding to step S1600, measuring the voltage.

The step of measuring the output voltage of the solar cell and comparing the initial voltage or less than the output resumption voltage (S1600, S1700, S1800) as described above, the battery 25 is used for a long time as described above, the function is impaired and rapid charging And it is preferable to include when the discharge.

Through all the above configurations and steps, in providing the control apparatus and method of the solar power regulator according to the present invention, it is possible to supply power to the load from the solar cell without damaging the storage battery, and to transfer the current state to the outside. Display makes it easy to see the status of the entire system.

In the above described with reference to the accompanying drawings, preferred embodiments of the present invention in detail. However, embodiments of the present invention may be variously modified or applied by those skilled in the art, the scope of the technical idea according to the present invention should be determined by the claims below. will be.

According to an aspect of the present invention, it is possible to provide stability to prevent damage to the battery due to overcharge and over-discharge by controlling in accordance with the state of the solar cell, the battery to supply power to the load in real time.

According to another aspect of the present invention, by controlling the power supplied to the load in accordance with the state of the storage battery can provide stability to prevent damage to the load.

According to another aspect of the present invention, by displaying the current state of the battery to the outside it can provide a convenience that the administrator can easily grasp the state of the battery.

According to another aspect of the present invention, by measuring and alternately displaying the voltage and current of the solar cell, the battery, and the load connected to the battery protection device, the display space can be reduced and the administrator can easily recognize the state of the system.

Claims (12)

The present invention relates to a power regulator that supplies power to a load by regulating power output from a solar cell A charging unit supplying or blocking power output from the solar cell to the storage battery; An output unit configured to supply or cut off power output from the storage battery to a load; A sensing unit measuring current and voltage on all paths from the solar cell to the load; And And control means for controlling the operation of the charging unit and the output unit by receiving the current value and the voltage value measured from the sensing unit. The method of claim 1, wherein the control device, A voltage current display unit displaying current and voltage values on the path; And The control device of the solar power regulator for the solar power generation further comprises a LED display for displaying the operating state of the battery. The method of claim 1, wherein the control means, A voltage current value memory for temporarily storing a voltage value and a current value for each measurement part output from the sensing unit; A reference voltage value storage unit for storing reference voltage value data for preventing damage to the storage battery corresponding to “overcharge preventing voltage”, “charge resuming voltage”, “over discharge preventing voltage”, and “output resume voltage”; A comparator for comparing the measured voltage and the reference voltage output from the voltage current value memory and the reference voltage value storage unit with each other; Read the measured voltage and current value temporarily stored in the voltage current value memory, and alternately output to the voltage current display section at predetermined time intervals, A microcomputer that determines the state of the battery protection device according to the result of the comparator as being “overcharged”, “charging”, “over-discharge”, “output” and outputs corresponding data values to the LED display unit; And And a counter for counting the alternating output time of the voltage and current display unit. The method of claim 2 or 3, wherein the voltage current display unit, Control device for a photovoltaic power regulator, characterized in that for displaying the current and voltage values measured on the path using a 7-segment or LCD. The method of claim 2 or 3, wherein the voltage current display unit, Have a number of LEDs corresponding to the device on the path to be measured, The LED is a control device for a solar power regulator, characterized in that alternately lit. The reference voltage value stored in the reference voltage value storage unit, The overcharge prevention voltage value, the charge resuming voltage value, the overdischarge prevention voltage value and the output resuming voltage value are determined by using hysteresis. The present invention relates to a power control method of supplying power to a load by adjusting power output from a solar cell. (a) transmitting the voltage of the storage battery measured by the sensing unit to the voltage current value memory; (b) reading and comparing the measured voltage with a reference voltage stored in a reference voltage value storage unit; (c) determining a state of a current battery by receiving the comparison result; (d) discharging the power of the battery to the load by turning off the charging unit in the overcharged state according to the result determined by the above; (e) if the state of being charged, according to the result determined above, turning off the charging unit to charge the storage battery power from the solar cell; (f) charging the power of the battery from the solar cell by turning off the output unit in the over-discharge state according to the result determined by the above; And (g) according to the result determined in the above, if the output state comprises the step of outputting the power of the battery to the load by the output unit, wherein the reference voltage is a voltage value for setting the overcharge, charging, over-discharge, output Control device of a solar power regulator for power generation. The method of claim 7, wherein the step (d) of discharging the power of the battery to the load, The microcomputer is a control method of a solar power regulator for a photovoltaic power generation, characterized in that it further comprises the step of lighting the LED corresponding to the overcharge by outputting an LED light signal indicating "overcharge" to the LED display. The method of claim 7, wherein the step (e) of charging the power of the storage battery from the solar cell, The control method of the solar power regulator for a photovoltaic power generation characterized in that it further comprises the step of lighting the LED corresponding to the charging while the LED display signal indicating that the microcomputer "charging". The method of claim 7, wherein the step (f) of charging the power of the storage battery from the solar cell, The microcomputer is a control method of the solar power regulator for power generation, characterized in that it further comprises the step of lighting the LED corresponding to the over-discharge by outputting an LED light signal indicating "over-discharge" to the LED display. The method of claim 7, wherein outputting the power of the storage battery to a load (g), The microcomputer outputs a LED lighting signal indicating that the "output" to the LED display unit, the step of lighting the LED corresponding to the output control method for a solar power regulator for power generation. The method of claim 7 or 10, wherein the control method of the power regulator, When the storage battery is damaged, the sensing unit measuring the voltage output from the solar cell; Determining whether the measured voltage is less than or equal to an initial voltage; Determining whether the measured voltage is greater than or equal to an output resuming voltage; And The control method of the solar power regulator for a photovoltaic power generation, characterized in that further comprising the step of turning on the output when the measured voltage is reduced to less than the initial voltage, but more than the output restart voltage according to the determination result.