KR20230129907A - Method for controlling load for improving power system stability and apparatus using the same - Google Patents

Abstract

A load control method for improving power system stability and a device using the same are disclosed. A load control device according to an embodiment includes a frequency detector that detects the frequency of power supplied to at least one load device; and a control unit that determines a power stability state of the power based on the frequency of the power and controls the load of the at least one load device based on the power stability state, wherein the control unit determines the power stability state of the power based on the frequency of the power. If it is within a predetermined range, the power stability state is determined to be normal, and if the frequency of the power is lower than the lowest frequency of the predetermined range, the power stability state is determined to be a power shortage state, and the power frequency is determined to be within the predetermined range. If it is higher than the highest frequency, the power stability state may be determined to be a power excess state.

Description

Load control method for improving power system stability and device using the same {METHOD FOR CONTROLLING LOAD FOR IMPROVING POWER SYSTEM STABILITY AND APPARATUS USING THE SAME}

The present invention relates to a load control method for improving power stability and a device using the same.

In modern society, alternating current electricity is supplied in most countries. An important characteristic of alternating current electricity is that the production and consumption of electricity must occur in real time. If the amount of electricity used is greater than or insufficient compared to the amount of electricity supplied, an imbalance in supply and demand may occur, and the power system may become unstable, leading to a large-scale blackout. Accordingly, the existing industrial structure stabilized the power system by predicting power requirements and determining the power supply amount to match the predicted power requirements.

However, recently, as renewable energy is rapidly replacing thermal power generation sources, the conventional method of determining the amount of power supply through prediction of power consumption has become invalid. This is because, in the case of renewable energy, it is difficult to control the power generation amount of renewable energy such as solar power and wind power as the power generation amount is controlled by the environment, and the rate of change in the power generation amount of renewable energy is too fast.

Accordingly, in the carbon-neutral era where the proportion of renewable energy is increasing, new methods to stabilize the power system are required.

The problem to be solved by this application is to determine the power stability state using the power frequency and, when the power is unstable, to provide a load control method to improve power stability by controlling at least one load according to the power stability state. It is done.

The problem to be solved by this application is not limited to the problems described above, and problems not mentioned can be clearly understood by those skilled in the art from this specification and the attached drawings. .

A load control device according to an embodiment includes a frequency detector that detects the frequency of power supplied to at least one load device; and a control unit that determines a power stability state of the power based on the frequency of the power and controls the load of the at least one load device based on the power stability state, wherein the control unit determines the power stability state of the power based on the frequency of the power. If it is within a predetermined range, the power stability state is determined to be normal, and if the frequency of the power is lower than the lowest frequency of the predetermined range, the power stability state is determined to be a power shortage state, and the power frequency is determined to be within the predetermined range. If it is higher than the highest frequency, the power stability state may be determined to be a power excess state.

The means for solving the problem of this application are not limited to the above-mentioned solution means, and the solution methods not mentioned can be clearly understood by those skilled in the art from this specification and the attached drawings. You will be able to.

According to the present application, power stability can be improved by determining the power stability state using the power frequency and controlling at least one load when the power is unstable.

The effects of the present application are not limited to the effects described above, and effects not mentioned can be clearly understood by those skilled in the art from this specification and the attached drawings.

1 is a diagram for explaining a power stabilization system according to an embodiment.
Figure 2 is a block diagram for explaining a load control device according to an embodiment.
Figure 3 is a diagram for explaining an example of a load device according to an embodiment.
Figure 4 is an operation flowchart for explaining a load control method according to an embodiment.
Figure 5 is a diagram for explaining load control according to power frequency according to an embodiment.
6 to 9 are diagrams for explaining a power stabilization system according to another embodiment.

The embodiments described in this specification are intended to clearly explain the idea of the present invention to those skilled in the art to which the present invention pertains, and the present invention is not limited to the embodiments described in this specification, and the present invention is not limited to the embodiments described in this specification. The scope should be construed to include modifications or variations that do not depart from the spirit of the present invention.

The terms used in this specification are general terms that are currently widely used as much as possible in consideration of their function in the present invention, but this may vary depending on the intention of those skilled in the art, precedents, or the emergence of new technology in the technical field to which the present invention belongs. You can. However, if a specific term is defined and used with an arbitrary meaning, the meaning of the term will be described separately. Therefore, the terms used in this specification should be interpreted based on the actual meaning of the term and the overall content of this specification, not just the name of the term.

The drawings attached to this specification are intended to easily explain the present invention, and the shapes shown in the drawings may be exaggerated as necessary to aid understanding of the present invention, so the present invention is not limited by the drawings.

In this specification, if it is determined that a detailed description of a known configuration or function related to the present invention may obscure the gist of the present invention, the detailed description thereof will be omitted as necessary.

1 is a diagram for explaining a power stabilization system according to an embodiment.

Referring to FIG. 1 , the power stabilization system 10 may include a load control device 100, a server 200, and a load device 300.

The load control device 100 may determine the stability of the power supplied to the load device 300 and control the load of the load device 300 if the power is not stable. In addition, when the power is stable, no separate control is performed on the load device 300, or the control details performed when the stability of power is determined can be maintained.

In one embodiment, the load control device 100 detects the power frequency (or grid frequency) of power supplied to the load device 300 periodically or aperiodically, and the detected power frequency is within a predetermined threshold frequency range. You can determine whether or not it is included. When the detected power frequency is within a predetermined critical frequency range, the load control device 100 may determine that the power supplied to the load device 300 is stable. However, when the detected power frequency is not included in the predetermined critical frequency range, the load control device 100 determines that the power supplied to the load device 300 is unstable and controls the load device 300. . In addition, after controlling the load device 300, the load control device 100 re-determines whether the power supplied to the load device 300 is stable periodically or aperiodically, and determines whether the power supplied to the load device 300 is stable. The load device 300 can be controlled until the power is determined to be stable.

Additionally, the load control device 100 may communicate with the server 200. The load control device 100 may provide the server 200 with information such as power frequency detection results, power stability determination results, whether the load device 300 is controlled, control operation, control time, and control results.

The server 200 may communicate with the load control device 100 and monitor the load control device 100. For example, the server 200 may record and manage information provided from the load control device 100. Additionally, the server 200 may provide the load control device 100 with information necessary for the operation of the load control device 100. For example, the server 200 determines whether the load control device 100 is operating, the critical frequency range used to determine power stability in the load control device 100, and control operation information of the load device 300. The information is provided to the control device 100, and the load control device 100 can perform operations such as determining power stability and controlling the load device 300 based on the information obtained from the server 200. Additionally, depending on the embodiment, the server 200 may remotely control the load control device 100. For example, the server 200 transmits a control signal to the load control device 100 to control the load control device 100, and receives information about the operation results according to the control signal from the load control device 100. You can receive it.

Additionally, the load device 300 may be a device that performs operations in various places, such as at home or in industry. For example, the load device 300 may be a variety of devices that receive power and perform operations, such as lighting, home appliances (TV, washing machine, air conditioner, refrigerator, sound device, etc.), and communication devices. In one embodiment, load device 300 can continuously operate and control the load. For example, the load device 300 may operate or disable the load, increase the load, or lower the load by the load device 300 itself or by control of an external device. As a specific example, when the load device 300 is a lighting device, the lighting device may turn the lighting on/off, increase the illumination intensity, or lower the illumination intensity by the lighting device itself or by control of an external device.

In addition, although the load device 300 is described as one device in FIG. 1, it is not limited thereto, and there may be at least one load device 300. In this specification, description is made on the assumption that there is at least one load device 300.

Figure 2 is a block diagram for explaining a load control device according to an embodiment.

Referring to FIG. 2 , the load control device 100 may include a memory unit 110, a control unit 120, a frequency detection unit 130, and a communication unit 140.

The control unit 120 may determine the stability of power supplied to at least one load device and control the load of the at least one load device based on the determination result of power stability. The operation of the control unit 120 will be described in detail in this specification.

The control unit 120 may include one or more of a central processing unit (CPU), a graphic processing unit (GPU), one or more microprocessors, and other electronic components capable of processing input data according to predetermined logic.

Additionally, the control unit 120 may be implemented with software, hardware, or a combination thereof. For example, in hardware, the control unit 120 may be implemented with a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a semiconductor chip, or other various types of electronic circuits. Also, for example, , In terms of software, the control unit 120 may be implemented with a logic program or various computer languages that are executed according to the above-described hardware.

Additionally, the memory unit 110 stores instructions for controlling the control unit 120, and the control unit 120 can perform operations based on the instructions stored in the memory unit 110.

Additionally, the memory unit 110 may store information necessary for the operation of the control unit 120. For example, the memory unit 110 may include a critical frequency range used by the control unit 120 to determine power stability, control operation information of at least one load device, etc. Additionally, the memory unit 110 may store the results of the operation of the control unit 120. For example, the memory unit 110 may store information on power frequency detection results, power stability determination results, control status of at least one load device, control operation, control time, and control result.

In addition, the memory unit 110 may be a flash memory type, hard disk type, multimedia card micro type, or card type memory (for example, SD or XD memory, etc.). ), RAM (Random Access Memory), SRAM (Static Random Access Memory), ROM (Read-Only Memory, ROM), EEPROM (Electrically Erasable Programmable Read-Only Memory), PROM (Programmable Read-Only Memory) magnetic memory , may include at least one type of storage medium among a magnetic disk and an optical disk. In addition, memory can store information temporarily, permanently, or semi-permanently, and can be provided as a built-in or removable type.

Additionally, the frequency detector 130 can detect the frequency of power. For example, the frequency detector 130 may be electrically connected to an AC power source that supplies power to at least one load device. The frequency detector 130 may convert a signal of the AC power source into a digital signal and detect the power frequency of the AC power source based on the digital signal. As an example, the frequency detection unit 130 may obtain the input instantaneous frequency from the digital signal and detect the power frequency based on the input instantaneous frequency. Additionally, the frequency detection unit 130 may detect the power frequency by applying a first-order filter, a digital filter, an adaptive filter, etc. to the input instantaneous frequency. In addition, the frequency detection unit 130 can detect the power frequency using various methods. Additionally, in some cases, the frequency detection unit 130 may convert the signal of the AC power into a digital signal, and the control unit 120 may detect the power frequency based on the digital signal.

The communication unit 140 may communicate with the server. Additionally, depending on the embodiment, the communication unit 140 may communicate with at least one load device and/or another external device.

The communication unit 140 may mainly perform communication according to wireless communication standards, but may also include BLE (Bluetooth Low Energy), Bluetooth, WLAN (Wireless LAN), WiFi (Wireless Fidelity), WiFi Direct, and NFC (Near Field Communication). ), mobile communication modules including Infrared Data Association (IrDA), UWB (Ultra Wide Band), Zigbee, 3G, 4G or 5G, and wired and wireless modules that transmit data through various other communication standards. can do. Additionally, the communication unit 140 may include a short-range wireless module supporting Near Field Communication (NFC), Radio-Frequency Identification (RFID), etc. Additionally, the communication unit 310 may include a wireless module that supports a wireless mesh network (WMN). For example, the wireless mesh network may use a certain low-power wireless communication (Wireless Personal Area Network, WPAN) method.

Additionally, the load control device 100 may be implemented in the form of a server.

Additionally, the load control device 100 may be provided with additional configurations for performing additional functions and operations depending on selection. For example, depending on the embodiment, the load control device 100 may not include the communication unit 140. Additionally, in another example, the load control device 100 may further include a power supply unit 1340 and/or a power usage detection unit (not shown), which will be described later with reference to FIG. 8 .

Figure 3 is a diagram for explaining an example of a load device according to an embodiment.

Referring to FIG. 3, the load device may be composed of a plurality of lighting devices. Additionally, a plurality of lighting devices are connected to communicate through a wireless mesh network, and each lighting device can communicate with nearby lighting devices. Additionally, the master lighting device 310 may communicate with the load control device, receive a control signal from the load control device, and control the master lighting device 310 according to the control signal. In addition, the master lighting device 310 transmits the control signal or a processed control signal based on the control signal to surrounding lighting devices, and lighting devices surrounding the master lighting device 310 are controlled according to the received lighting signal. It can be. Depending on the embodiment, there may be a plurality of master lighting devices 310. Additionally, lighting devices surrounding the master lighting device 310 may also transmit a received control signal or a processed control signal based on the received control signal to surrounding lighting devices. In this way, as a plurality of lighting devices are communicated and connected through a wireless mesh network, the load control device can control all lighting devices by controlling the master lighting device 310. For example, when the load controller transmits a control signal to control the illuminance to the master lighting device 310, the master lighting device 130 and other lighting devices connected to the wireless mesh network that includes the master lighting device 130 The illuminance may be controlled according to the control signal. The embodiment of FIG. 3 can be applied to the description of the load device in this specification.

Figure 4 is an operation flowchart for explaining a load control method according to an embodiment.

Referring to FIG. 4, the load control device detects the frequency of power supplied to at least one load device (S100), determines the power stability state based on the detected frequency (S200), and determines the power stability state. It may include controlling the load of at least one load device based on (S300).

In step S100, the load control device may detect the frequency of power supplied to at least one load device. In one embodiment, the load control device is electrically connected to an AC power source that supplies power to at least one load device, and can detect the power frequency using the frequency detection unit 130 of FIG. 2. Additionally, the load control device may detect the power frequency periodically or aperiodically. For example, the load control device may detect the power frequency at a period of 16 ms to 4 s.

Additionally, in step S200, the load control device may determine the power stability state based on the detected frequency. Specifically, the relationship between power supply and power consumption and power frequency can be expressed as Equation 1 below.

[Equation 1]

Here, P _mech represents mechanical energy, that is, energy input to the synchronous generator of the power plant that supplies power, and may mean the amount of power supplied. P _elec represents electrical energy, that is, the output energy of a synchronous generator of a power plant, and may mean power consumption. And, M represents the moment of inertia, that is, the inertial force constant for each rotating body of the synchronous generator, and may be a constant. w _o can be expressed as 2Π * f ₀ . Here, f ₀ represents the power frequency. f ₀ may be set differently depending on the country. For example, in the case of Korea, f ₀ may be set to 60Hz.

As in Equation 1, if the power supply and power consumption are the same, the power frequency may not change. However, if the power supply is lower than the power requirement, the power frequency may be lowered. Additionally, if the amount of power supplied is greater than the amount of power required, the power frequency may increase. Additionally, if the power supply amount is excessively lower than the power requirement, a power shortage state may occur, and if the power supply amount is excessively higher than the power requirement, a power excess state may occur. In this way, as the power frequency changes depending on the amount of power supply and power consumption, the load control device can determine the power stability state based on the power frequency.

In one embodiment, the load control device may determine the power stability state using a predetermined threshold frequency range. Additionally, the critical frequency range may be set based on a load ratio according to the rated load of at least one load device. Specifically, the load control device may set the entire range of detected power frequency (i.e., frequency tracking range) based on the upper limit load rate and lower limit load rate according to the rated load of at least one load device. In one embodiment, the load control device may set the upper limit load rate and the lower limit load rate based on the load rate according to the rated load of at least one load device. As an example, the load control device may set the upper limit load rate to 100% and the lower limit load rate to 70%. Accordingly, the load control device can set the entire range of the detected power frequency to 59.784 Hz to 60.216 Hz. Here, 59.784 Hz may be a numerical value reflecting a lower limit load rate of 70%, and 60.216 Hz may be a numerical value reflecting an upper limit load rate of 100%. Additionally, the load control device may determine the critical frequency range based on the critical load ratio according to the rated load of at least one load device. For example, the critical load rate may be set to 85%, and the load control device may set the critical frequency range to 59.964 Hz to 60.036 Hz, which reflects the critical load rate of 85%. Of course, the critical frequency range may change depending on the rated load, upper load limit, and/or lower limit load rate of the at least one load device.

Additionally, in other embodiments, the threshold frequency range may be obtained from a server or set through an external input of the load control device.

Additionally, the load control device may determine that the power stability state is normal when the detected power frequency is within a predetermined threshold frequency range. In addition, the load control device determines the power stability state as a power shortage state when the detected power frequency is lower than the lowest frequency of the predetermined critical frequency range, and the detected power frequency is higher than the highest frequency of the predetermined critical frequency range. In this case, the power stability state may be determined to be a power excess state. Specifically, in the above embodiment, the threshold frequency range may be 59.784 Hz to 60.216 Hz, the lowest frequency of the threshold frequency range may be set to 59.784 Hz, and the highest frequency of the threshold frequency range may be set to 60.216 Hz. If the detected power frequency is between 59.784 Hz and 60.216 Hz, the load control device may determine the power stability state to be normal. In addition, if the detected power frequency is lower than the lowest frequency, 59.784 Hz, the load control device determines the power stability state as a power shortage state, and if the detected power frequency is higher than the highest frequency, 60.216 Hz, the load control device determines the power stability state as a power shortage state. The stability state can be judged as a power excess state.

Additionally, in step S300, the load control device may control the load of at least one load device based on the power stability state. When it is determined that the power stability state is normal, the load control device may not separately control at least one load device or may maintain control matters performed when the power stability state was determined. Additionally, when the power stability state is determined to be a power shortage state, the load control device may control the load of at least one load device to be lowered. This may be to match power demand with power supply by reducing power consumption of at least one load device. For example, the load control device may set an adjusted load rate of at least one load device based on the difference between the detected power frequency and the lowest frequency and control the at least one load device according to the adjusted load rate. For example, when at least one load device includes a lighting device, the load control device may control the illuminance of the lighting device to be lowered according to the adjusted load rate.

Additionally, when the power stability state is determined to be a power excessive state, the load control device may control the load of at least one load device to increase. This may be to match the power demand to the power supply by increasing the power consumption of at least one load device. For example, the load control device may set an adjusted load rate of at least one load device based on the difference between the detected power frequency and the highest frequency and control the at least one load device according to the adjusted load rate. For example, when at least one load device includes a lighting device, the load control device may control the illuminance of the lighting device to increase according to the adjusted load rate.

In the case of lighting devices, users may not be able to sensitively perceive changes in illuminance of the lighting device. For example, in a situation where the lighting device operates at a load rate of 85%, the user may not be sensitive to the fact that the illuminance decreases as the load rate is adjusted to 70% or that the illuminance increases as the load rate is adjusted to 100%. there is. Accordingly, even if the illuminance of the lighting device is adjusted according to the adjustment load rate, the user may not be sensitive to the change in illuminance. Accordingly, the load control device can stabilize power through load control of the lighting device without reducing user convenience.

Step S300 will be described in detail using FIG. 5.

Figure 5 is a diagram for explaining load control according to power frequency according to an embodiment.

Referring to FIG. 5, the x-axis of the graph may represent frequency, and the y-axis may represent load. As in the above-described embodiment, when the upper limit load rate according to the rated load of at least one load device is set to 100% and the lower limit load rate is set to 70%, the entire range of power frequency can be set to 59.784 Hz to 60.216 Hz. there is. Additionally, when the critical load ratio is set to 85%, the critical frequency range can be set to 59.964 Hz to 60.036 Hz.

If the detected power frequency is included in the first frequency range (a) between 59.964 Hz and 60.036 Hz, the load control device may determine the power stability state to be normal and not adjust the load rate of the at least one load device. . That is, in this case, the load control device can maintain the load ratio of at least one load device at 85%.

In addition, when the detected power frequency is included in the second frequency range (b) of 59.784 Hz or more and less than 59.964 Hz, the load control device determines the power stability state as a power shortage state, and determines the power stability state as a power shortage state, and the detected power frequency and the threshold frequency range are within the range. The adjusted load rate can be set using the difference from the lowest frequency, 59.964Hz. For example, the load control device may set a reference difference value between the power frequency and the lowest frequency within the threshold frequency range, and set a reference load rate corresponding to the reference difference value. The load control device can set the adjusted load rate using the reference difference value and the reference load rate. For example, the reference difference value may be set to 0.012Hz, and the reference load rate may be set to 1%. At this time, when the detected power frequency is 59.845 Hz, the difference between the detected power frequency and the highest frequency may be 0.119 Hz, and the difference may be about 10.8 times the reference difference. In this case, the load control device can reduce the standard load rate of 1% by 10 times and set the adjusted load rate to 75%. That is, the load control device can lower the load factor of at least one load device by 10%.

In addition, when the detected power frequency is included in the third frequency range (c) of more than 60.036 Hz and less than 60.216 Hz, the load control device determines the power stability state as a power excess state, and the detected power frequency and the threshold frequency range are within the range. The adjusted load rate can be set using the difference from the highest frequency, 60.036Hz. For example, the load control device may set a reference difference value between the power frequency and the highest frequency within the threshold frequency range, and set a reference load rate corresponding to the reference difference value. The load control device can set the adjusted load rate using the reference difference value and the reference load rate. For example, the reference difference value may be set to 0.011 Hz, and the reference load rate may be set to 1%. At this time, when the detected power frequency is 60.085 Hz, the difference between the detected power frequency and the highest frequency may be 0.049 Hz, and the difference may be about 4.5 times the reference difference. In this case, the load control device can increase the standard load rate of 1% by 4 times and set the adjusted load rate to 89%. That is, the load control device can increase the load factor of at least one load device by 4%.

In addition, according to the embodiment, the load control device may preset an adjustment load rate for each frequency section of the detected power frequency and adjust the load of at least one load device with an adjustment load rate corresponding to the frequency section to which the detected power frequency belongs. there is.

In this way, the load rate of at least one load device can be adjusted in real time according to the detected frequency band, and the power supply and demand imbalance can be quickly stabilized. For example, multiple load control devices may be installed throughout the country. At this time, if a power shortage occurs, the power frequency of AC power may be lowered nationwide. In this case, the plurality of load control devices can detect the lowered power frequency and lower the load amount of the plurality of load devices controlled by each load control device. Accordingly, the load of load devices across the country is lowered and power consumption is reduced, thereby stabilizing the power supply and demand imbalance in real time. Accordingly, phenomena such as blackout due to power shortage can be prevented.

6 to 9 are diagrams for explaining a power stabilization system according to another embodiment.

Referring to FIG. 6, in the power stabilization system 20, the load control device 1100 may be included in the load device 3100. Accordingly, the load device 3100 may include a load control device 1100 and a functional unit 1130.

Additionally, the functional unit 1130 may perform the operation of the load device 3100. For example, when the load device 3100 is a lighting device, the functional unit 1130 can turn on/off lighting, adjust illuminance, etc. Additionally, the functional unit 1130 may operate depending on the load.

The load control device 1100 may include a frequency detection unit 1110 and a control unit 1120. The control unit 1120 detects the power frequency of the power supplied to the load device 3100 using the frequency detection unit 1110, determines the power stability state of the supplied power based on the detected power frequency, and determines the power stability state of the power supplied to the load device 3100. The load of the functional unit 1130 can be controlled according to the stability state. Since the above-described details can be applied to the load control device 1100, the frequency detection unit 1110, and the control unit 1120, detailed descriptions are omitted.

Referring to FIG. 7, in the power stabilization system 30, the load control device 1200 may be a hub device that controls a plurality of load devices 3210 and 3220. In this case, the load control device 1200 may include a frequency detection unit 1210, a control unit 1220, and a communication unit 1230. For example, the control unit 1120 detects the power frequency of the power source using the frequency detection unit 1210, determines the power stability state of the supplied power source based on the detected power frequency, and determines the power stability state of the supplied power source based on the determined power stability state. The load amounts of a plurality of load devices (3210, 3220) can be controlled simultaneously.

Specifically, when the power stability state is determined to be a power shortage state, the control unit 1220 sends a first control signal for controlling the load amount of the plurality of load devices 3210 and 3220 to be lowered to the plurality of loads through the communication unit 1230. It can be transmitted to devices 3210 and 3220. In addition, when the power stability state is determined to be an excessive power state, the control unit 1220 sends a second control signal to control the load of the plurality of load devices 3210 and 3220 to increase through the communication unit 1230. It can be transmitted to (3210, 3220). In addition, when the power stability state is determined to be normal, the control unit 1220 sends a third signal to the plurality of load devices 3210 and 3220 to control the plurality of load devices 3210 and 3220 to maintain the current load amount through the communication unit 1230. It can be transmitted to (3210, 3220). Of course, at this time, the control unit 1220 may not transmit a separate control signal to the plurality of load devices 3210 and 3220 so that the plurality of load devices 3210 and 3220 maintain the current load amount. The plurality of load devices 3210 and 3220 may adjust the load amount according to the first to third control signals. For example, when the plurality of load devices 3210 and 3220 are lighting devices and the plurality of load devices 3210 and 3220 obtain the first control signal, the illuminance is adjusted according to the adjustment load rate included in the first control signal. can be lowered. In addition, when the plurality of load devices 3210 and 3220 obtain the second control signal, the illuminance can be lowered according to the adjustment load rate included in the second control signal, and when the third control signal is obtained, the current illuminance can be maintained. Since the above-described details can be applied to the load control device 1200, the frequency detection unit 1210, the control unit 1220, and the communication unit 1230, detailed descriptions are omitted.

Referring to FIG. 8, in the power stabilization system 40, the load control device 1300 may be a plug device that supplies power to at least one load device 3300. In this case, the load control device 1300 may include a frequency detection unit 1310, a control unit 1320, a communication unit 1330, and a power supply unit 1340.

In one embodiment, at least one load device 3300 is electrically connected to the power supply unit 1340, and the power supply unit 1340 may supply power to the at least one load device 3300. The frequency detection unit 1310 may detect the power frequency of power supplied from the power supply unit 1340 to at least one load device 3300 in real time.

The control unit 1320 determines the power stability state of the supplied power based on the power frequency detected using the frequency detection unit 1310, and controls the load amount of at least one load device 3300 according to the determined power stability state. can do.

At this time, depending on the embodiment, at least one load device 3300 does not include a communication unit capable of communicating with the load control device 1300, and may communicate with the infrared control device 4000 using infrared. An infrared transmitting and receiving unit (not shown) may be included. Additionally, the infrared control device 4000 may include a communication unit (not shown) capable of communicating with the load control device 1300. In this case, the control unit 1320 may transmit a control signal for controlling the load amount of at least one load device 3300 to the infrared control device 4000 through the communication unit 1330. Thereafter, the infrared control device 4000 may transmit the received control signal or a control signal processed based on the received control signal to at least one load device 3300 through infrared communication.

Additionally, depending on the embodiment, the control unit 1320 may transmit information about the detected power frequency to the infrared control device 4000 through the communication unit 1330, and the infrared control device 4000 may transmit information about the detected power frequency to the infrared control device 4000. The adjusted load rate of at least one load device 3300 may be set based on the information. Since the above-mentioned information can be applied to setting the adjusted load ratio, detailed description is omitted.

At least one load device 3300 may control the load amount based on a signal received from the infrared control device 4000.

Of course, when at least one load device 3300 includes a communication unit (not shown) capable of communicating with the load control device 1300, the control unit 1320 connects at least one load device (not shown) through the communication unit 1330. A control signal for controlling the load amount of 3300 may be transmitted to at least one load device 3300. Additionally, when the communication unit 1330 is capable of performing infrared communication, the control unit 1320 can transmit the control signal to at least one load device 3300 through the communication unit 1330 through infrared communication.

Additionally, the load control device 1300 may further include a power usage detector (not shown) that detects the amount of power consumed by at least one load device 3300 in real time. The control unit 1320 may check whether the load amount of at least one load device 3300 has been adjusted using a power usage detector (not shown). In addition, since the above-described details can be applied to the load control device 1300, the frequency detection unit 1310, the control unit 1320, and the communication unit 1330, detailed descriptions are omitted.

Referring to FIG. 9 , in the power stabilization system 50, the load control device 1400 may be a plug device that supplies power to at least one load device 3400. In this case, the load control device 1400 may include a frequency detection unit 1410, a control unit 1420, and a power supply unit 1430. Unlike the embodiment of FIG. 8, at least one load device 3400 may not include a communication unit that communicates with the outside. For example, at least one load device 3400 may be a legacy load device without a communication function.

In one embodiment, at least one load device 3400 is electrically connected to the power supply unit 1430, and the power supply unit 1430 may supply power to the at least one load device 3400. The frequency detection unit 1410 may detect the power frequency of power supplied from the power supply unit 1430 to at least one load device 3400 in real time. The control unit 1420 may determine the power stability state of the supplied power based on the power frequency detected using the frequency detection unit 1410, and control at least one load device 33400 according to the determined power stability state. there is. For example, when the power stability state is determined to be a power shortage state, the control unit 1420 may control the power supply unit 1430 to block power supply to at least one load device 3400. Accordingly, the power consumption of at least one load device 3400 may be reduced. Additionally, the load control device 1400 may further include a power usage detector (not shown) that detects the amount of power consumed by at least one load device 3400 in real time. The control unit 1420 may check whether the load amount of at least one load device 3300 has been adjusted using a power usage detector (not shown). In addition, since the above-described details may be applied to the load control device 1400, the frequency detection unit 1410, the control unit 1420, and the power supply unit 1430, detailed descriptions are omitted.

Various embodiments of the present specification may be implemented as software including instructions stored in a machine-readable storage media that can be read by a machine (e.g., a computer). The device may read instructions stored from the storage medium. A device capable of calling and operating according to the called instruction, may include an electronic device according to the disclosed embodiments. When the instruction is executed by a processor, the processor directly or another component under the control of the processor The function corresponding to the above command can be performed using elements. The command may include code generated or executed by a compiler or interpreter. A storage medium that can be read by a device is non-transitory. It can be provided in the form of a storage medium. Here, 'non-transitory storage medium' does not include signals and only means that it is tangible and does not distinguish whether the data is stored semi-permanently or temporarily in the storage medium. For example, a 'non-transitory storage medium' may include a buffer where data is temporarily stored.

According to one embodiment, methods according to various embodiments disclosed in this specification may be included and provided in a computer program product. Computer program products are commodities and can be traded between sellers and buyers. The computer program product may be distributed on a machine-readable storage medium (e.g. compact disc read only memory (CD-ROM)) or online through an application store (e.g. Play Store™). In the case of online distribution, at least a portion of the computer program product (e.g., a downloadable app) is at least temporarily stored in a storage medium such as the memory of a manufacturer's server, an application store's server, or a relay server; Can be created temporarily.

As described above, although the embodiments have been described with limited examples and drawings, various modifications and variations can be made by those skilled in the art from the above description. For example, the described techniques are performed in a different order than the described method, and/or components of the described system, structure, device, circuit, etc. are combined or combined in a different form than the described method, or other components are used. Alternatively, appropriate results may be achieved even if substituted or substituted by an equivalent.

Therefore, other implementations, other embodiments, and equivalents of the claims also fall within the scope of the claims described below.

Claims (15)

In a load control device that controls the load of at least one load device based on supplied power,
a frequency detector that detects the frequency of power supplied to the at least one load device; and
A control unit that determines a power stability state of the power based on the frequency of the power and controls the load of the at least one load device based on the power stability state.
Including,
The control unit,
If the frequency of the power is within a predetermined range, the power stability state is determined to be normal,
If the frequency of the power is lower than the lowest frequency of the predetermined range, determining the power stability state as a power shortage state,
When the frequency of the power is higher than the highest frequency of the predetermined range, determining the power stability state as a power excess state,
Load control device.
According to paragraph 1,
The control unit,
When the power stability state is determined to be the power shortage state, controlling the load of the at least one load device to be lowered,
Load control device.
According to paragraph 2,
The control unit,
When the power stability state is determined to be the power shortage state, an adjusted load rate of the at least one load device is set based on a difference value between the frequency of the power and the lowest frequency, and the adjusted load rate of the at least one load device is set according to the adjusted load rate. to control the load device of,
Load control device.
According to paragraph 2,
The control unit,
When the at least one load device includes a lighting device,
Controlling the illuminance of the lighting device to be lowered,
Load control device.
According to paragraph 1,
The control unit,
When the power stability state is determined to be the power excessive state, controlling the load of the at least one load device to increase,
Load control device.
According to clause 5,
The control unit,
When the power stability state is determined to be the power excessive state, an adjusted load rate of the at least one load device is set based on a difference value between the frequency of the power and the highest frequency, and the adjusted load rate of the at least one load device is set according to the adjusted load rate. to control the load device of,
Load control device.
According to clause 5,
The control unit,
When the at least one load device includes a lighting device,
Controlling the illuminance of the lighting device to increase,
Load control device.
According to paragraph 1,
The control unit,
Setting the critical frequency range based on the load factor of the at least one load device,
Load control device.
According to paragraph 1,
The load control device is a hub device that controls the at least one load device,
The load control device further includes a communication unit that communicates with the at least one load device,
The control unit,
When the power stability state is determined to be the power shortage state, transmitting a first control signal for controlling the load of the at least one load device to be lowered to the at least one load device through the communication unit,
When the power stability state is determined to be the power excessive state, transmitting a second control signal for controlling the load of the at least one load device to increase to the at least one load device through the communication unit,
Load control device.
According to paragraph 1,
The load control device,
A plug device that supplies power to the at least one load device,
The load control device further includes a power supply unit that supplies power to the at least one load device,
The control unit,
Checking the amount of power supplied from the power supply unit in real time,
Load control device.
According to clause 10,
The load control device,
A communication unit that performs communication with an infrared control device that controls the at least one load device through infrared communication
It further includes,
The control unit,
When the power stability state is determined to be the power shortage state, transmitting a first control signal for controlling the at least one load device to lower the load to the infrared control device through the communication unit,
When the power stability state is determined to be the power excessive state, transmitting a second control signal for controlling the at least one load device to increase the load to the infrared control device through the communication unit,
Load control device.
According to clause 10,
The control unit,
Controlling the power supply unit so that power is not supplied to the at least one load device when the power stability state is determined to be the power shortage state,
Load control device.
According to paragraph 1,
The load control device,
Included within a first load device among the at least one load device,
Load control device.
In a load control method for controlling the load of at least one load device based on supplied power,
detecting the frequency of power supplied to the at least one load device;
determining a power stability state of the power based on the frequency of the power; and
controlling the load of the at least one load device based on the power stability state
Including,
The step of determining the power stability state of the power based on the frequency of the power,
If the frequency of the power is within a predetermined range, the power stability state is determined to be normal,
If the frequency of the power is lower than the lowest frequency of the predetermined range, determining the power stability state as a power shortage state,
When the frequency of the power is higher than the highest frequency of the predetermined range, determining the power stability state as a power excess state,
Load control method.
A computer-readable recording medium recording a program for executing the method according to claim 14.