KR101690040B1 - The apparatus and method for controlling power of photovoltaic inverters status display equipment by using illuminance sensor - Google Patents

Abstract

The present invention relates to a method and an apparatus for controlling the power source of a state display apparatus of a solar inverter using an illuminance sensor, which enables a person to view the state of the solar inverter only at night or day, The power of the status display device is turned off to reduce the loss caused by the standby power to increase the efficiency. In addition, the present invention provides a method that can change the status display contents without a button using an illuminance sensor. A state display device 20 having a state display window 10 formed on one side thereof for displaying a state value of the solar inverter; and a power supply device (not shown) for supplying or cutting off power to the state display device under the control of the control part 30), a control unit (40) for controlling the state display device to supply or cut off power and a current state value display, a detector (50) for digitizing the illuminance value detected by the illuminance sensor, And an illuminance sensor (60) for sensing the illuminance or light of a surrounding space in which the display device is installed. The controller (30) includes a storage medium storing a control program and supplies power to the status display device And controlling the display of the current state value.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for controlling power of a solar inverter,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar inverter, and more particularly, to a method for reducing standby power of a solar inverter. The solar inverter is a device that converts the DC power stored in the photovoltaic collectors to AC, and the solar inverter has a display window to indicate the operation status. Regardless of the need of the user, unnecessary standby power is consumed because power is always supplied to the display window. The present invention relates to saving standby power by supplying the standby power only when the user needs it.

Recently, interest in renewable energy such as wind power generation, fuel cell, small cogeneration power generation, and photovoltaic power generation is increasing, and penetration rate is increasing. In particular, solar power generation has a higher penetration rate than other renewable energy sources.

It is installed and operated in homes, schools, government offices, mountains, remote islands, and remote areas. Due to the development of the photovoltaic system and the development of the Internet, most photovoltaic systems are operating unattended and the status of the solar inverters is confirmed via the Internet or mobile.

However, most solar inverters are equipped with a display device using an LCD, a touch screen or the like to indicate the operating state of the solar inverter. These display devices always display status regardless of whether people are present or not, and are operating at night when the solar inverter does not operate, and standby power is generated.

One million green projects are being implemented by the government. In the green business, other renewable energy is installed, but most of them are installing solar photovoltaic systems. Assuming that half of the photovoltaic systems are installed, it can be considered that standby power is generated at 500,000, and if you think about industrial, more standby power may be generated.

A method of automatically changing the state of the solar inverters installed in the home or outdoor by a method of displaying the state is used. In most cases, the contents of the status display window are changed with a certain amount of time, which is convenient. However, when the user tries to view the value to be watched, there is an inconvenience to wait until a certain time passes or to look at a fast passing value.

Therefore, there is a need for a method that can reduce standby power and easily obtain status information through a status display window when the user needs it without additional control buttons.

Korean Patent No. 10-1187311 (September 25, 2012)

The present invention enables the user to view only when a person wants to view the state of the solar inverter regardless of whether it is night or day by using an illuminance sensor and automatically cut off the power of the status display device to reduce the loss caused by standby power, I want to increase.

In addition, the present invention provides a method that can change the status display contents without a button using an illuminance sensor.

According to an aspect of the present invention, there is provided an apparatus for displaying status of a solar inverter using an illuminance sensor, including: an illuminance sensor for measuring illuminance; A detection unit (50) for detecting an illuminance sensor value; A control unit (40) for comparing the detected illuminance value with a reference value and controlling power supply to the display unit and display of status information through the display unit according to the comparison result; A status display device (20) for displaying status information of the solar inverter; A display window (10) installed at one side of the status display window; And a power supply device (30) for supplying power to the device.

According to another aspect of the present invention, there is provided a method of controlling a status display of a solar inverter using an illuminance sensor, the method comprising: detecting and comparing a space with a current device; Comparing whether the bright state is maintained for 10 seconds; Comparing whether the dark state is maintained for 10 seconds; Turning off the power of the status display device; Supplying power to the status display device; Displaying a starting status indication; Detecting and comparing a light or dark space of the apparatus with the power supply state of the status display apparatus; Detecting illuminance for 3 seconds when it is dark; Incrementing the counter by one if it is dark for three seconds; Changing the counter to 0 if it is not dark for 3 seconds; Comparing the counter value to 100; Detecting illuminance for 3 seconds when the space in the apparatus is bright in the power supply state of the status display apparatus; Incrementing the counter by 1 if it is illuminated for 3 seconds; Changing the counter to 0 if it is not bright for 3 seconds; Comparing the counter value to 100; And changing the counter value to zero.

In this method, the time of the comparing step of whether the bright state and the dark state are maintained for 10 seconds is changeable.

In the above method, the time for comparing the illuminance for 3 seconds can be changed.

In the above method, the comparison value of the step of comparing whether the counter value is 100 can be changed.

In the above method, an illuminance sensor can be used for illuminance detection, and various illuminance sensors can be used depending on the manufacture.

In the above method, the position of the illuminance sensor can receive ambient light, and can be set to a position that does not react with the light of the status display window and the light inside the apparatus.

The method of arbitrarily changing the illuminance in order to supply power to the status display device in the above-described method may use a human hand or an object.

In the above method, the illuminance sensor circuit can be used in accordance with each apparatus.

In the above method, power supply control can use relays, switches, electromagnetic switches and the like.

The present invention can reduce the standby power of the solar inverter and the renewable energy device, thereby increasing the efficiency, and the present invention can be applied to a status display device of another apparatus operating similar to a solar inverter.

The present invention can be applied to a small-sized inverter such as a solar photovoltaic inverter with a simple structure, and an algorithm and an illuminance sensor circuit are simple, thereby reducing the unit cost.

Further, the present invention can control the status display window of the solar inverter without a button, thereby providing convenience for the user.

1 is a flowchart showing power control of a solar inverter status display apparatus using a light intensity sensor according to the present invention.
FIG. 2 is a flowchart showing a power control and a display state value control of the solar inverter status display apparatus using the illuminance sensor of the present invention.
3 is a block diagram illustrating a power control device of a solar-energy inverter status display apparatus using the illuminance sensor of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to fully understand the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified in various forms and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It is to be noted that the same components are denoted by the same reference numerals in the respective drawings, and the detailed description of known functions and configurations that may be unnecessarily obscured by the gist of the present invention will be omitted.

In addition, terms and words used in the present invention should not be construed to limit the conventional dictionary meaning, but should be construed in accordance with the meaning and concept of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, power supply control of a solar inverter status display apparatus using an illuminance sensor according to the present invention will be described with reference to the preferred embodiments of the present invention with reference to the accompanying drawings.

FIG. 1 shows a method of controlling the power of the solar inverter status display apparatus using the illuminance sensor of the present invention.

<Explanation of operation in daylight or lighting condition>

First, explain the operation in a space with daylight or light. Initially, the status display window of the solar inverter is in a state in which standby power is cut off and no information is displayed. First, the current illuminance value is detected 101 through the illuminance sensor. Using the detected illuminance value, it is confirmed (102) whether light is detected. The reason for detecting light is to determine whether the current state is low, whether it is illuminated, night or no illumination. If light is detected, the light is continuously detected (103) for a first time (the first time is user configurable and preferably 10 seconds). (104) whether light is maintained for a first time. Here, since the daylight is on and the light is continuously detected, the power of the status display device is turned off (105). That is, the continuous detection of the light means that the user does not perform a special action (a behavior to obscure the light) in view of the status display window, so that it is unnecessary to supply power to the status display window, will be.

If the user wishes to see the value of the status display device, if the light of the illuminance sensor is blocked for 1 second or 2 seconds by using the hand or the object with the illuminance sensor (the light is not maintained for the first time) It is determined that the light is not held for a predetermined period of time, power is supplied to the status display device (108), and the start value of the status display device is displayed (109). Then, the illuminance sensor value is detected (110). (112) the light sensor value is detected (112) for a second time when the light is detected (preferably the second time is changeable by user setting, preferably 2 or 3 seconds) Ensure that light is maintained for a period of time (113). If the light from the ambient light sensor is not artificially blocked, the light will be held for a second time, and the counter is incremented by one (114). The increased counter value is compared with the first reference value (116), and steps 112, 113, 114, and 116 are repeated until the first reference value is reached. When the count value reaches the first reference value, the counter value is set to 0 (122), and the power supply of the status display power supply unit is turned off (105). The first reference value is preferably 100, and may be changed to 50 (corresponding to about 2 minutes and 30 seconds), 150,200, etc. according to the user's need. The time required for the count value to reach 100 is usually about 5 minutes. That is, when the illuminance sensor is not sensed for a predetermined period of time in order to view the initial state display window in the daytime or the illuminated state, power is supplied to the state display window (108), the display window is activated, (If the first reference value is set to 100), the power supply is stopped again (122) and the status display device is deactivated (if the first reference value is set to 100) (when the count value reaches 100 by repeating circulation of 112,113,114,116) I'm going back.

If it is determined in step 113 that light can not be maintained for the second time (in this case, the power supply of the status display device must be continuously maintained, and the user intentionally shades the light of the ambient light sensor for the second time or longer) The counter value is set to 0 (115), and steps 116, 112, 113, and 114 are repeated. That is, when the user does not detect the light by blocking the illuminance sensor using the back of the hand while the steps 112, 113, 114, and 116 are repeated, the count is reset to 0 and the counting is repeated. For example, when the count is 80 (when the first reference value is set to 100), if there is an action of the user as described above, the count is reset and counting starts again from 0, The power is always supplied to the status display window to be continuously activated.

<Operation at night or without light>

1, an operation in a light-free space such as a night or a basement is explained. The value of the illuminance sensor is detected (101). (102) whether light is detected. No light is detected at night or without illumination. If light is not detected, the illumination sensor value is detected (106) for a first time (the first time is preferably user configurable and preferably 10 seconds). Confirm 107 that the darkness is maintained for the first time. If darkness is continuously detected for the first time, the power of the status display device is turned off (105). Here, when darkness is detected continuously for the first time, it means nighttime or no-light condition, which means that there is no user. If the user wants to see the value of the status display in the dark, he supplies a light such as a torch or a fluorescent lamp to the ambient light sensor for more than one second. Then, the illuminance sensor senses the light, and the comparator determines that darkness is not maintained for the first time, supplies power to the status display device (108), and displays the current status value of the solar inverter in the status display device (109) do. Then, the brightness sensor value is detected (110) and it is confirmed (111) whether light is detected.

No light is detected at step 111 because there is no illumination at night. Next, the light sensor value is detected 117 for a second time period (the second time is preferably user configurable and 2 or 3 seconds is preferred), and the darkness is maintained 118 for a second time. If the illuminance sensor is not artificially illuminated by a light such as a flashlight or a fluorescent lamp, the darkness will be maintained for a second time and the counter is incremented by one (119). The incremented counter value is compared with the first reference value 121, and steps 117, 118, 119, and 121 are repeated until the first counter value becomes the first reference value. When the count value reaches the first reference value, the counter value is set to 0 (122), and the power supply of the status display power supply unit is turned off (105). The first reference value may be changed according to the setting of the user and is preferably 100. The time required for the count value to reach 100 is usually about 5 minutes. That is, when the illuminance sensor is irradiated with light for a certain period of time to see the initial state display window at night or without illumination, the darkness is not maintained for the first time (107), power is supplied to the state display window (108) This state lasts for about 5 minutes (when the first reference value is set to 100) (the steps 117, 118, 119, and 121 are cyclically repeated for 5 minutes) unless the special event is present. When the count value reaches the first reference value, The power supply is interrupted (122) and the status display returns to the inactive state.

If it is determined in step 118 that darkness can not be maintained for the second time period (in this case, it is necessary to continuously supply the power of the status display apparatus and the user operates the light sensor artificially for a second time or longer ) The counter value is set to 0 (120), and steps 121, 117, 118 and 119 are repeated. That is, if the user lights a light on the illuminance sensor in the middle of repeating steps 117, 118, 119 and 121, it is determined that the darkness is not maintained for the second time, and the count is reset to 0 and the counting is repeated. For example, if the count is reset to 80 (when the first reference value is set to 100), the count is reset and counting starts again from 0, so that the user can turn on the light sensor When an investigation is performed, power is continuously supplied to the status display window to be continuously activated.

This section explains the case where the lighting is turned on in a basement or in a dark place, such as a fluorescent lamp. This case is the same as the daytime method.

When the fluorescent lamp is turned on in a dark state, the power is supplied to the status display and becomes active. Next, it is determined whether light is detected (111). Fluorescent light is on and light is detected. Next, the ambient light sensor value is detected 112 for a second time (preferably a second time is 2 seconds or 3 seconds if changeable by user setting) and the light is maintained 113 for a second time. If the illumination sensor does not block the illumination light by artificially blocking the sensing area of the illuminance sensor, the light will be maintained for a second time, and the counter value is incremented by one (114). The increased counter value is compared with the first reference value (116), and steps 112, 113, 114, and 116 are repeated until the first reference value is reached. When the count value reaches the first reference value, the counter value is set to 0 (122), and the power supply of the status display power supply unit is turned off (105). The first reference value may be changed according to the setting of the user and is preferably 100. The time required for the count value to reach 100 is usually about 5 minutes. That is, when the fluorescent lamp is turned on to display the initial state display window in the dark state, when the dark state is not maintained for the first time period (107), power is supplied to the state display window (108), the display window is activated, (If the first reference value is set to 100), the count value is maintained at the first reference value. If the count value reaches the first reference value, (122) The status display returns to the inactive state.

Describe the case of working with a flashlight outdoors in the dark. This case is the same as the night operation.

When the flashlight is lit on the illuminance sensor for a certain period of time in a dark state, power is supplied to the status display device to become active. Next, it is determined whether light is detected (111). Since it is outdoors in the dark, no light is detected. Then, if no light is detected in step 111, the light sensor value is detected 117 for a second time, and the darkness is maintained 118 for a second time. If the illuminance sensor is not artificially illuminated with a flashlight or a light fixture, the darkness will be maintained for a second time and the counter is incremented by one (119). The incremented counter value is compared with the first reference value 121, and steps 117, 118, 119, and 121 are repeated until the first counter value becomes the first reference value. When the count value reaches the first reference value, the counter value is set to 0 (122), and the power supply of the status display power supply unit is turned off (105). The first reference value may be changed according to the setting of the user and is preferably 100. The time required for the count value to reach 100 is usually about 5 minutes. That is, when light is irradiated to the illuminance sensor for a predetermined time using a flashlight to view the initial status display window in a dark outdoor state, the darkness is not maintained for a first time (107), power is supplied to the status display window (108) (The first reference value is set to 100) (the steps 117, 118, 119, and 121 are repeatedly repeated for 5 minutes), and when the count value reaches the first reference value, The device is powered down (122) and the status indicator returns to the inactive state.

If it is determined in step 118 that darkness can not be maintained for the second time period (in this case, it is necessary to continuously supply the power of the status display apparatus and the user operates the light sensor artificially for a second time or longer ) The counter value is set to 0 (120), and steps 121, 117, 118 and 119 are repeated. That is, if the user lights a light on the illuminance sensor in the middle of repeating steps 117, 118, 119 and 121, it is determined that the darkness is not maintained for the second time, and the count is reset to 0 and the counting is repeated. For example, if the count is reset to 80 (when the first reference value is set to 100), the count is reset and counting starts again from 0, so that the user can turn on the light sensor When an investigation is performed, power is continuously supplied to the status display window to be continuously activated.

FIG. 2 shows power control and display state value control of the solar inverter status display apparatus using the illuminance sensor. The power supply of the status display apparatus is the same as that of FIG. 1, (200) by changing the state value of the solar inverter to the current state value (200) by supplying the light to the illuminance sensor for the second time and turning the count value to 0 And the state value of the solar inverter is changed to the current state value (201).

That is, after activating the state display window during the day or night, the light is blocked or inspected every predetermined time to maintain the active state continuously. At this time, the state value of the inverter displayed on the state display device is the latest state value And displays the updated information.

By using the above-described method, the standby power supplied to the status display device of the solar inverter can be efficiently reduced in any place or in the light state, and the operation of the solar inverter without waste of energy becomes possible.

In addition, the power control method of the solar inverter display apparatus using the illuminance sensor as described above can be automatically performed by computer programming, and the program is provided in the form of a recording medium readable by a computer.

Hereinafter, a power control apparatus of the solar inverter status display apparatus to which the power control method of the solar inverter display apparatus described above is applied will be described in detail with reference to FIG.

The power supply control device of the solar inverter status display apparatus using the illuminance sensor according to the present invention includes an illuminance sensor 60, a detection unit 50, a control unit 40, a power supply unit 30, a status display unit 20, ).

The illuminance sensor 60 is means for sensing the illuminance of the surrounding space in which the status display device of the solar inverter is installed, that is, the light. The detecting unit 50 is means for digitizing the illuminance value detected by the illuminance sensor. The power supply device 30 performs a function of supplying power to the status display device under the control of the control unit. The status display device 20 has a status display window 10 on one side and displays the current status value of the solar inverter to the user through the status display window.

The control unit 40 performs control for supplying or cutting off power to the status display device and controlling the display of the current status value according to the control method described with reference to FIGS. In addition, the control unit includes a storage medium (not shown) in which a control program is stored, and the control unit performs control to supply or cut off power to the status display device and control to display the current status value according to the control program.

Hereinafter, the operation characteristics of the control unit 40 will be described in detail.

First, the control unit compares the detected current illumination value with the stored reference illumination value. The reference illuminance value is set by the user as a reference value for comparing whether the current ambient space state is low or night or whether or not the illumination state is present. If the currently detected illuminance value is greater than or equal to the reference illuminance value, it is determined that the light is in the daytime or the illuminated state. If the illuminance is less than the reference illuminance value, The reference illuminance value can be changed according to the setting of the user.

The status display device is initially kept in an initial state in which power is not supplied.

First, the case where it is judged as daytime is explained.

As a result of the determination, if it is determined that the light is in the daytime or the illuminated state, it is determined whether the light is maintained for the first time. If it is maintained, control is continuously performed to turn off the power to the status display device. However, if the light is not maintained for the first time, power is supplied to the status display device to activate the status display device, and it is determined whether the light is periodically maintained for the second time period with the status display device being activated. If the light is maintained for the second time, the count value is increased by 1 and the count is continued until the first reference value is reached. That is, it is periodically judged whether light is maintained for the second time, and if the light is maintained, the count value is continuously increased and counted up to the first reference value. The power supply is maintained until the first reference value is reached. If the light is not maintained for the second time during counting (when the user intentionally blocks the light by blocking the light sensor), the count value is reset to 0, and the current inverter status value is displayed on the status display window, . Therefore, when the initial activation power is supplied to the status display device, the power supply is maintained for a certain period of time (time until the count value reaches the first reference value) unless a special situation occurs If the power supply is interrupted and the user repeatedly interrupts the light intentionally during the counting period, the power supply is always maintained in the status display device and the status display window The current state value of the inverter is updated.

Next, a case in which it is judged as night is explained.

As a result of the determination, if it is determined that night or no illumination is present, it is determined whether darkness is maintained for the first time. When the darkness is maintained, the power to the status indicator is continuously turned off. However, if the darkness is not maintained for the first time (the user intentionally irradiates light to the illuminance sensor), power is supplied to the status display device for primary activation, and the status display device is periodically activated To determine if darkness is maintained. If the darkness is maintained for the second time, the count value is increased by 1 and the count is continued until the first reference value is reached. That is, it is periodically judged whether the darkness is maintained for the second time, and if the darkness is maintained, the count value is continuously increased and counted up to the first reference value. The power supply is maintained until the first reference value is reached, and the power supply is stopped when the count value reaches the first reference value. If the darkness can not be maintained for the second time during the counting (when the user intentionally illuminates the light sensor), the count value is reset to 0 and the present inverter status value is displayed on the status display and the count is again Go ahead. Therefore, if no special situation occurs after the first activation power is supplied to the status display device, the power supply is maintained for a predetermined time (time until the count value reaches the first reference value) and the power supply is interrupted. However, if the user intentionally interrupts the darkness during the counting period, for example, repeating the operation of irradiating light to the illuminance sensor by using a flashlight, the status display device is always supplied with power, The current status value of the inverter is updated on the status display window.

As described above, according to the present invention, by using the illuminance sensor, it is possible to view only when a person wants to see the state of the solar inverter regardless of night or day, and automatically turn off the power of the status display device, The basic idea is to reduce the loss and increase the efficiency. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims. Are included in the scope of the present invention, and the true technical protection scope of the present invention should be determined within the scope of the claims.

10: Status display 20: Status display
30: Power supply
40:
50:
60: Light intensity sensor

Claims (11)

A method of controlling power of a solar inverter status display apparatus using an illuminance sensor,
A step (10) of detecting illumination or light to determine whether the periphery of the status display device is bright or dark;
Determining whether a bright state is maintained for a first time if the bright state is determined;
If the bright state is maintained for the first time as a result of the determination in step 20, stopping the power supply and performing step 10;
If it is determined in step 20 that the bright state is not maintained for the first time, activating a display window of the status display device by supplying power to the status display device;
A step (50) of judging again whether the periphery of the status display device is bright or dark by sensing illumination or light around the status display device;
Determining whether a bright state is maintained for a second time if the bright state is determined;
If it is determined in step 60 that the bright state is maintained for the second time, incrementing the count value by 1 and determining whether the count value has reached the first reference value (step 70);
Performing step 50 if the reference value is not reached as a result of the determination in step 70;
If it is determined in step 70 that the reference value has been reached, resetting the count value to 0, then shutting off power supply to the status display device and performing step 10;
And resetting the count value to 0 and performing step 50 if the bright state is not maintained for the second time as a result of the determination in step 60. [ / RTI &gt;
delete A method of controlling power of a solar inverter status display apparatus using an illuminance sensor,
A step (10) of detecting illumination or light to determine whether the periphery of the status display device is bright or dark;
Determining (20) if the dark state is determined to be dark for a first time;
If it is determined in step 20 that the dark state is maintained for the first time, turning off the power supply and performing step 10;
If it is determined in step 20 that the dark state is not maintained for the first time, activating a display window of the status display device by supplying power to the status display device;
A step (50) of judging again whether the periphery of the status display device is bright or dark by sensing illumination or light around the status display device;
Determining whether a dark state is maintained for a second time if the dark state is determined;
If it is determined in step 60 that the dark state is maintained for the second time, incrementing the count value by 1 and determining whether the count value has reached the first reference value (step 70);
Performing step 50 if the reference value is not reached as a result of the determination in step 70;
If it is determined in step 70 that the reference value has been reached, resetting the count value to 0, then shutting off power supply to the status display device and performing step 10;
And resetting the count value to 0 and performing step 50 if the dark state is not maintained for the second time as a result of the determination in step 60. The solar light inverter status display device / RTI &gt;

delete delete delete delete 4. The method according to any one of claims 1 to 3,
Wherein the step 100 further comprises the step of resetting the count value to 0 and then updating and displaying the state value of the solar inverter displayed on the display window of the status display device as the current state value. A method of controlling power of a status display device.
1. A power control apparatus for a solar-light inverter status display apparatus using an illuminance sensor,
A state display device 20 having a state display window 10 formed on one side thereof to display a state value of the solar inverter; a power supply device 30 for supplying or cutting off power to the state display device under the control of the control part; A control unit 40 for controlling the display device to supply or cut off power and a current state value display, a detector 50 for digitizing the illuminance value detected by the illuminance sensor, and a status display device for the solar inverter And a light intensity sensor 60 for sensing the illuminance or light of the surrounding space. The control unit 40 includes a storage medium in which a control program is stored, and controls and supplies power to the status display device according to a stored control program. Controls the display of current state values,
Wherein the control program is programmed to perform the control method according to any one of claims 1 to 3,
delete A computer-readable recording medium having recorded thereon a program for executing the control method according to any one of claims 1 to 3.

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