TW202006380A - Smart grid protection system and protection method for smart grid - Google Patents

Abstract

A smart grid protection system is provided in the present disclosure. The smart grid protection system is installed in a grid system. The smart grid protection system includes a first power protection device and a second power protection device. The first power protection device includes a first power consumption and leakage detecting module for detecting the power consumption and leakage status of the first circuit, and a first Bluetooth low energy communication module. The second power protection device includes a second power consumption and leakage detecting module for detecting the power consumption and leakage status of the second circuit, and a second Bluetooth low energy communication module. The first Bluetooth low energy communication module communicates with the second Bluetooth low energy communication module in a broadcasting manner.

Description

Smart grid protection system and smart grid protection method

The invention relates to a protection system and protection method, in particular to a smart grid protection system and protection method.

Due to the emergence of smart meters, smart grids can be gradually popularized. However, whether smart meters use wired or wireless networks to transmit data, they are mainly based on data backhaul, and there is no way to provide active protection in special situations. action. That is to say, each power node can only rely on the safety switch set as its protection mechanism, and can not use the various electrical energy information of the smart grid to protect each power node in a given area.

In view of this, providing a smart grid protection system is indeed an important issue in the industry.

An embodiment of the present invention provides a smart grid protection system, which is provided in a grid system, wherein the grid system includes at least a first power loop and a second power loop, and the first power loop includes at least a first Power transmission line, the second power loop includes at least a second power transmission line, the first power loop includes a first power control node, the second power loop includes a second power control node, the first power The control node is provided with a first power control switch, the second power control node is provided with a second power control switch, and the smart grid protection system includes: a first power supply protection device, which is provided in the first power circuit The first control node is electrically connected to the first power control switch, wherein the first power protection device includes: a first power consumption and leakage detection module for detecting the first power A power consumption and a leakage state of the loop; a first low-power Bluetooth communication module; and a first energy storage module, electrically connected to the first power consumption and leakage detection module and the first A Bluetooth low energy communication module, the first energy storage module supplies power to the first power consumption and leakage detection module and the first Bluetooth low energy communication module; a second power protection device , Which is arranged on the second control node of the second power circuit and electrically connected to the second power control switch, wherein the second power supply protection device includes: a second power consumption and leakage detection A module for detecting a power consumption and a leakage state of the second power circuit; a second low-power Bluetooth communication module; and a second energy storage module electrically connected to the second power Power consumption and leakage detection module and the second low-power Bluetooth communication module, the second energy storage module supplies power to the second power consumption and leakage detection module and the second low power consumption Bluetooth communication module; wherein, the first power consumption and leakage detection module of the first power protection device detects that the power consumption of the first power circuit is greater than a first upper limit or When the leakage state of the first power circuit is leakage, the first power supply protection device notifies the first power control switch to adjust the output power of the first power circuit; wherein, the first power supply The first low-power Bluetooth communication module of the protection device notifies the second low-power Bluetooth communication module of the second power supply protection device to correspondingly regulate the second power control node of the second power control node 2. Power control switch.

In view of this, the present invention provides a smart grid protection method suitable for a grid system, wherein the grid system includes at least a first power loop and a second power loop, and the first power loop includes at least a first A power transmission line, the second power loop includes at least a second power transmission line, the first power loop includes a first power control node, and the second power loop includes a second power control node, the first The power control node is provided with a first power control switch, and the second power control node is provided with a second power control switch. The smart grid protection method includes the following steps: using a first power supply protection device to detect the first power A power consumption and a leakage state of the circuit, if the first power protection device detects that the power consumption of the first power circuit or the leakage device is abnormal, the first power protection device enters a Protection mode; adjusting the output power of the first power circuit according to the protection mode of the first power supply protection device; and notifying a second power supply provided in the second power circuit using a Bluetooth broadcast A protection device to regulate the output power of the second power circuit.

In summary, the smart grid protection system of the embodiment of the present invention uses the power supply protection devices that communicate with each other through the Bluetooth communication protocol, and notifies the power consumption protection devices of the same power consumption area by broadcasting signals according to the abnormal power consumption detected by the power supply protection device. The power supply protection devices installed in other power control nodes can further regulate the power consumption of each power circuit in the power consumption area.

1‧‧‧Grid system

2‧‧‧Smart grid protection system

11‧‧‧ First Power Circuit

12‧‧‧The second power circuit

13‧‧‧The third power circuit

14‧‧‧ Fourth Power Circuit

21‧‧‧First power protection device

22‧‧‧Second power supply protection device

23‧‧‧The third power protection device

24‧‧‧Fourth power supply protection device

110‧‧‧The first power transmission line

120‧‧‧Second power transmission line

130‧‧‧The third power transmission line

140‧‧‧ Fourth power transmission line

111‧‧‧The first power control node

121‧‧‧The second power control node

131‧‧‧The third power control node

141‧‧‧The fourth power control node

111A‧‧‧The first power control switch

121A‧‧‧The second power control switch

131A‧‧‧The third power control switch

141A‧‧‧The fourth power control switch

211‧‧‧The first power consumption and leakage inspection module

212‧‧‧The first Bluetooth low energy communication module

213‧‧‧The first energy storage module

214‧‧‧ First temperature protection module

221‧‧‧The second power consumption and leakage inspection module

222‧‧‧ Second Bluetooth Low Energy Communication Module

223‧‧‧Second Energy Storage Module

224‧‧‧Second temperature protection module

FIG. 1 is a schematic diagram of a smart grid protection system according to an embodiment of the present invention.

2 is a schematic diagram of a first power protection device and a second power protection device according to an embodiment of the present invention.

3 is a flowchart of a smart grid protection method according to an embodiment of the present invention.

The following is a specific specific example to illustrate the implementation of the "physiological detection device" disclosed in the present invention. Those skilled in the art can easily understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments. Various details in this specification can also be based on different viewpoints and applications, and various modifications and changes can be made without departing from the spirit of the present invention. In addition, the drawings of the present invention are merely schematic illustrations, and are not depicted according to actual dimensions. It should be understood that although the terms first, second, third, etc. may be used herein to describe various elements and the like, these elements should not be limited by these terms. These terms are used to distinguish one element from another. In addition, there are mentioned quantities or the like, and unless otherwise stated, the application scope of the present invention should not be limited by the quantity or the like. The following embodiments will further describe the related technical content of the present invention in detail, but the disclosed content is not intended to limit the technical scope of the present invention.

[The embodiment of the smart grid protection system of the present invention]

Please refer to FIGS. 1 and 2. FIG. 1 is a schematic diagram of a smart grid protection system according to an embodiment of the present invention. 2 is a schematic diagram of a first power protection device and a second power protection device according to an embodiment of the present invention.

In this embodiment, the smart grid protection system 2 is provided in a grid system 1 that includes at least two power circuits, that is, power circuits controlled by two power control nodes. In this embodiment In it, the grid system 1 includes a first power circuit 11, a second power circuit 12, a third power circuit 13, and a fourth power circuit 14. In this embodiment, the power grid system 1 is installed in a power consumption area (not shown), and the size of the power consumption area is not limited in the present invention.

Moreover, each power circuit includes at least one power transmission line, that is, the first power circuit 11 includes at least one first power transmission line 110. The second power circuit 12 includes at least a second power transmission line 120. The third power circuit 13 includes at least a third power transmission line 130. The fourth power circuit 14 includes at least a fourth power transmission line 140.

Correspondingly, each power circuit will include a power control node, which is set on each power circuit as a control node of each power circuit. That is, in this embodiment, the first power circuit 11 includes a first power control node 111 that is electrically connected to the first power transmission line 110. The second power circuit 12 includes a second power control node 121 electrically connected to the second power transmission line 120. The third power circuit 13 includes a third power control node 131 electrically connected to the third power transmission line 130. The fourth power circuit 14 includes a fourth power control node 141 electrically connected to the fourth power transmission line 140.

The first power control node 111 includes a first power control switch 111A. The second power control node 121 includes a second power control switch 121A. The third power control node 131 includes a third power control switch 131A. The fourth power control node 131 includes a fourth power control switch 131A.

The smart grid protection system 2 includes at least two power supply protection devices. In this embodiment, the smart grid protection system 2 includes a first power supply protection device 21, a second power supply protection device 22, a third power supply protection device 23, and a Fourth power protection device 24. Among them, the first power supply protection device 21, the second power supply protection device 22, the third power supply protection device 23, and the fourth power supply protection device 24 are respectively provided in the first power control node 111, the second power control node 121, the third power The control node 131 and the fourth force control node 141 respectively detect and regulate the leakage state and power consumption of the first power circuit 11, the second power circuit 12, the third power circuit 13, and the fourth power circuit 14, and Carry out protective actions. Among them, the power consumption of each power circuit, that is, the power consumption of each power circuit, and the leakage state is when each circuit has a fault point, it will cause excessive current and make the power circuit unable to operate.

In this embodiment, the first power protection device 21 is electrically connected to the first power control switch 111A and the first power transmission line 110. The second power protection device 22 is electrically connected to the second power control switch 121A and the second power transmission line 120. The third power protection device 23 is electrically connected to the third power control switch 131A and the third power transmission line 130. The fourth power protection device 24 is electrically connected to the fourth power control switch 141A and the fourth power transmission line 140.

Hereinafter, only the first power supply protection device 21 and the second power supply protection device 22 in the smart grid protection system 2 will be described in detail. The third power supply protection device 23 and the fourth power supply protection device 24 have the same structure and function as the first power supply protection device 21 and the second power supply protection device 22, and will not be repeated here.

The first power protection device 21 includes a first power consumption and leakage detection module 211, a first Bluetooth low energy communication module 212, a first energy storage module 213, and a first temperature protection module 214 . The second power protection device 22 includes a second power consumption and leakage detection module 221, a second Bluetooth low energy communication module 222, a second energy storage module 223, and a second temperature protection module 214 .

In this embodiment, the communication protocols used by the first Bluetooth low energy communication module 212 and the second Bluetooth low energy communication module 222 include Bluetooth communication protocol 4.0 and Bluetooth communication protocol 5.0, which can be adjusted according to actual needs. The design is not limited in the present invention. Wherein, the first Bluetooth low energy communication module 212 sends a first broadcast signal to communicate with the second Bluetooth low energy communication module 222. The second Bluetooth low energy communication module 222 can send a second broadcast signal to communicate with the second Bluetooth low energy communication module 212.

The first power consumption and leakage detection module 211 and the second power consumption and leakage detection module 221 are used to detect the power consumption and leakage status of the first power circuit 11 and the second power circuit 12, respectively .

The first energy storage module 213 is electrically connected to the first power consumption and leakage detection module 211 and the first Bluetooth low energy communication module 212. The first energy storage module 213 supplies power to the first power consumption and leakage detection module 211 and the first Bluetooth low energy communication module 212.

The second energy storage module 223 is electrically connected to the second power consumption and leakage detection module 221 and the second Bluetooth low energy communication module 222. The second energy storage module 223 supplies power to the second power consumption and leakage detection module 221 and the second Bluetooth low energy communication module 222.

In this embodiment, the first energy storage module 213 and the second energy storage module 223 are super capacitors or long-lasting battery cells, which are not limited in the present invention.

The first temperature protection module 214 is electrically connected to the first Bluetooth low energy communication module 212.

When the first temperature protection module 214 detects the temperature of the first power control node 111 or the temperature of the surrounding environment is higher than a first temperature, the first power protection device 21 provides an over-temperature warning signal to the first power control The switch 111A controls the output power of the first power circuit 11. In this embodiment, the first temperature is between 50 degrees Celsius and 70 degrees Celsius. In this embodiment, when the first temperature protection module 214 detects the temperature of the first power control node 111 or the temperature of the surrounding environment is higher than a second temperature, the first power protection device 21 notifies the first power control switch 111A The electric power of the first power circuit 11 is cut off. In this embodiment, the second temperature is between 90 degrees and 150 degrees Celsius.

Moreover, the first power supply protection device 21 will provide a warning signal through the first low-power Bluetooth communication module 212 to notify the second power supply protection device 22 to enable the first power control switch 111A to supply power to the first power circuit 11 Adjustment.

Similarly, the second temperature protection module 214 is electrically connected to the second Bluetooth low energy communication module 222. When the second temperature protection module 224 detects the temperature of the second power control node 121 or the temperature of the surrounding environment is higher than a first temperature, the second power protection device 22 provides an over-temperature warning signal to the second power control The switch 121A controls the output power of the second power circuit 12. In this embodiment, the first temperature is between 50 degrees Celsius and 70 degrees Celsius. In this embodiment, when the second temperature protection module 224 detects the temperature of the second power control node 121 or the temperature of the surrounding environment is higher than a second temperature, the second power protection device 22 notifies the second power control switch 121A The second power circuit 12 is cut off. In this embodiment, the second temperature is between 90 degrees and 150 degrees Celsius. In this embodiment, the setting of the temperature interval can be adjusted and designed according to actual needs, and is not limited in the present invention.

Moreover, the second power protection device 22 provides a warning signal through the second Bluetooth low energy communication module 222 to notify the first power protection device 21 so that the first power control switch 111A performs the corresponding first power circuit 11 Power supply adjustment.

In addition, the first power consumption and leakage detection module 211 of the first power supply protection device 21 detects that the power consumption of the first power circuit 11 is greater than a first upper limit value or the leakage status of the first power circuit 11 is already When there is a power leakage, the first power supply protection device 21 notifies the first power control switch 111A to adjust the output power of the first power circuit 11, that is, to reduce the output power of the ground power circuit 11, or to cut off the first power The electrical energy output of the loop 11.

The first low-power Bluetooth communication module 212 of the first power protection device 21 notifies the second low-power Bluetooth communication module 222 of the second power protection device 22, so that the second power protection device 22 regulates the second power accordingly The output power value output by the second power control switch 121A of the control node 121.

Further, the second power consumption and leakage detection module 221 of the second power protection device 22 detects that the power consumption of the second power circuit 12 is greater than a first upper limit value or the leakage state of the second power circuit 12 When the power leakage has occurred, the second power supply protection device 22 notifies the second power control switch 121A to adjust the output power of the second power circuit 12, that is, to reduce the output power of the second power circuit 12, or to cut off the first The power output of the second power circuit 12.

The second low-power Bluetooth communication module 222 of the second power protection device 22 notifies the first low-power Bluetooth communication module 212 of the first power protection device 21 so that the first power protection device 21 controls the first power accordingly The output power value output by the first power control switch 111A of the control node 111.

In this embodiment, the number of power circuits, power control nodes, power transmission lines, power control switches, and power supply protection devices is not limited to those listed above, and can be adjusted and designed according to actual needs, and is not limited in the present invention.

[The embodiment of the smart grid protection system of the present invention]

Please refer to FIG. 3, which is a flowchart of a smart grid protection method according to an embodiment of the present invention.

The embodiment of the present invention also provides a smart grid protection method, which is suitable for the above-mentioned grid system 1 and the smart grid protection system 2.

In this embodiment, the smart grid protection method includes the following steps: using a first power supply protection device to detect a power consumption and a leakage state of the first power circuit, if the first power supply protection device detects all When the power consumption or leakage device of the first power circuit is abnormal, the first power supply protection device enters a protection mode (step S110); according to the protection mode of the first power supply protection device The output power of the first power circuit (step S120); notify a second power supply protection device provided in the second power circuit using a Bluetooth broadcast method to regulate the output power of the second power circuit (step S130).

In steps S110 and S120, the first power consumption and leakage detection module 211 of the first power supply protection device 21 detects that the power consumption of the first power circuit 11 is greater than a first upper limit value or the first power circuit When the leakage state of 11 is leakage, the first power protection device 21 notifies the first power control switch 111A to adjust the power consumption of the first power circuit 11, that is, to reduce the power consumption of the first power circuit 11 Or, the power output of the first power circuit 11 is cut off, and then the first power supply protection device enters the protection mode.

In step S130, the first Bluetooth low energy communication module 212 of the first power protection device 21 sends a first broadcast signal to notify the second Bluetooth low energy communication module 222 of the second power protection device 22 to The second power supply protection device 22 correspondingly regulates the output power value output by the second power control switch 121A of the second power control node 121.

In this embodiment, the smart grid protection method further includes the following steps: a temperature value of each power control node or an ambient temperature value of the surrounding environment of each power control node to determine whether to send a warning signal (step S140).

In step S140, when the first temperature protection module 214 detects the temperature of the first power control node 111 or the ambient temperature of the surrounding environment is higher than a first temperature, the first power protection device 21 provides an over-temperature warning signal to The first power control switch 111A regulates the output power of the first power circuit 11. In this embodiment, the first temperature is between 50 degrees Celsius and 70 degrees Celsius. In this embodiment, when the first temperature protection module 214 detects the temperature of the first power control node 111 or the temperature of the surrounding environment is higher than a second temperature, the first power protection device 21 notifies the first power control switch 111A The electric power of the first power circuit 11 is cut off. In this embodiment, the second temperature is between 90 degrees and 150 degrees Celsius.

Moreover, the first power supply protection device 21 will provide a warning signal through the first low-power Bluetooth communication module 212 to notify the second power supply protection device 22 to enable the first power control switch 111A to supply power to the first power circuit 11 Adjustment.

Similarly, the second temperature protection module 214 is electrically connected to the second Bluetooth low energy communication module 222. When the second temperature protection module 224 detects the temperature of the second power control node 121 or the ambient temperature of the surrounding environment is higher than a first temperature, the second power protection device 22 provides an over-temperature warning signal to the second power The switch 121A is controlled to regulate the output power of the second power circuit 12. In this embodiment, the first temperature is between 50 degrees Celsius and 70 degrees Celsius. In this embodiment, when the second temperature protection module 224 detects the temperature of the second power control node 121 or the temperature of the surrounding environment is higher than a second temperature, the second power protection device 22 notifies the second power control switch 121A The second power circuit 12 is cut off. In this embodiment, the second temperature is between 90 degrees and 150 degrees Celsius.

Moreover, the second power protection device 22 provides a warning signal through the second Bluetooth low energy communication module 222 to notify the first power protection device 21 so that the first power control switch 111A performs the corresponding first power circuit 11 Power supply adjustment.

In summary, the smart grid protection system of the embodiment of the present invention uses the power supply protection devices that communicate with each other through the Bluetooth communication protocol, and notifies the power consumption protection devices of the same power consumption area by broadcasting signals according to the abnormal power consumption detected by the power supply protection device. The power supply protection devices installed in other power control nodes can further regulate the power consumption of each power circuit in the power consumption area.

The above are only preferred embodiments of the present invention, and are not intended to limit the scope of patent protection of the present invention. Therefore, all equivalent changes in the description and drawings of the present invention are included in the protection of the rights of the present invention. Within the scope, together with Chen Ming.

1‧‧‧Grid system

2‧‧‧Smart grid protection system

11‧‧‧ First Power Circuit

12‧‧‧The second power circuit

13‧‧‧The third power circuit

14‧‧‧ Fourth Power Circuit

21‧‧‧First power protection device

22‧‧‧Second power supply protection device

23‧‧‧The third power protection device

24‧‧‧Fourth power supply protection device

110‧‧‧The first power transmission line

120‧‧‧Second power transmission line

130‧‧‧The third power transmission line

140‧‧‧ Fourth power transmission line

111‧‧‧The first power control node

121‧‧‧The second power control node

131‧‧‧The third power control node

141‧‧‧The fourth power control node

111A‧‧‧The first power control switch

121A‧‧‧The second power control switch

131A‧‧‧The third power control switch

141A‧‧‧The fourth power control switch

Claims (11)

A smart grid protection system is provided in a grid system, wherein the grid system includes at least a first power loop and a second power loop, the first power loop includes at least a first power transmission line, the first Two power circuits include at least one second power transmission line, the first power circuit includes a first power control node, the second power circuit includes a second power control node, and the first power control node is provided with a first A power control switch, the second power control node is provided with a second power control switch, and the smart grid protection system includes: a first power supply protection device, which is provided on the first control node of the first power circuit And electrically connected to the first power control switch, wherein the first power supply protection device includes: a first power consumption and leakage detection module for detecting a power consumption of the first power circuit And a leakage state; a first Bluetooth low energy communication module; and a first energy storage module electrically connected to the first electrical energy consumption and leakage detection module and the first Bluetooth low energy communication Module, the first energy storage module supplies power to the first power consumption and leakage detection module and the first low-power Bluetooth communication module; a second power protection device is provided in the first The second control node of the second power circuit is electrically connected to the second power control switch, wherein the second power supply protection device includes: a second power consumption and leakage detection module for detecting A power consumption and a leakage state of the second power circuit; a second low-power Bluetooth communication module; and a second energy storage module electrically connected to the second power consumption and leakage detection module Group and the second Bluetooth low energy communication module, the second energy storage module supplies power to the second power consumption and leakage detection module and the second Bluetooth low energy communication module; wherein , The first power consumption and leakage detection module of the first power supply protection device detects that the power consumption of the first power circuit is greater than a first upper limit or the first power circuit When the current leakage state is leakage, the first power supply protection device notifies the first power control switch to adjust the output power of the first power circuit; wherein, the first power supply protection device A Bluetooth low energy communication module notifies the second Bluetooth low energy communication module of the second power supply protection device to correspondingly regulate the second power control switch of the second power control node. For example, in the smart grid protection system of claim 1, the first low-power Bluetooth communication module sends a first broadcast signal to communicate with the second low-power Bluetooth communication module. For example, in the smart grid protection system of claim 1, the first power supply protection device further includes: a first temperature protection module electrically connected to the first Bluetooth low energy communication module; wherein, When the first temperature protection module detects that the temperature of the first power control node is higher than a first temperature, the first power protection device provides an over-temperature warning signal to the first power control switch to control the temperature The output power of the first power circuit, and the first power protection device provides a warning signal through the first low-power Bluetooth communication module to notify the second power protection device. For example, in the smart grid protection system of claim 1, the second power supply protection device further includes: a second temperature protection module electrically connected to the first Bluetooth low energy communication module; wherein, When the second temperature protection module detects that the temperature of the first power control node is higher than a first temperature, the second power protection device provides an over-temperature warning signal to the second power control switch to regulate the temperature The output power of the second power circuit, and the second power protection device provides a warning signal through the second Bluetooth low energy communication module to notify the first power protection device. For example, the smart grid protection system of patent application item 1, wherein the first low-power Bluetooth communication module and the second low-power Bluetooth communication module use the Bluetooth communication protocol 4.0 or the Bluetooth communication protocol 5.0 for communication . A smart grid protection method is applicable to a grid system, wherein the grid system includes at least a first power loop and a second power loop, the first power loop includes at least a first power transmission line, and the second The power circuit includes at least one second power transmission line, the first power circuit includes a first power control node, the second power circuit includes a second power control node, and the first power control node is provided with a first power Control switch, the second power control node is provided with a second power control switch, and the smart grid protection method includes the following steps: using a first power supply protection device to detect a power consumption and a power consumption of the first power circuit Leakage state, if the first power supply protection device detects the power consumption of the first power circuit or the leakage device is abnormal, the first power supply protection device enters a protection mode; according to the first The protection mode of the power supply protection device regulates the output power of the first power circuit; and uses a Bluetooth broadcast to notify a second power protection device provided in the second power circuit to regulate the first 2. The output power of the power circuit. For example, the smart grid protection method according to item 6 of the patent application scope further includes: detecting a temperature of each power control node or an ambient temperature of the surrounding environment of each power control node, and determining whether to send a warning signal. For example, the smart grid protection method of claim 6 of the patent scope, wherein the first power supply protection device includes: a first power consumption and leakage detection module for detecting a power consumption of the first power circuit And a leakage state; a first Bluetooth low energy communication module; and a first energy storage module electrically connected to the first electrical energy consumption and leakage detection module and the first Bluetooth low energy communication A module, the first energy storage module supplies power to the first power consumption and leakage detection module and the first low-power Bluetooth communication module; and a second power protection device is provided in the The second control node of the second power circuit is electrically connected to the second power control switch, wherein the second power supply protection device includes: a second power consumption and leakage detection module for Detecting a power consumption and a leakage state of the second power circuit; a second low-power Bluetooth communication module; and a second energy storage module, electrically connected to the second power consumption and leakage detection A module and the second Bluetooth low energy communication module, the second energy storage module supplies power to the second electricity consumption and leakage detection module and the second Bluetooth low energy communication module. For example, in the smart grid protection method of claim 7, the first low-power Bluetooth communication module sends a first broadcast signal to communicate with the second low-power Bluetooth communication module. The second Bluetooth low energy communication module sends a second broadcast signal to communicate with the first Bluetooth low energy communication module. For example, the smart grid protection method of claim 7 of the patent scope, wherein the first power supply protection device includes: a first temperature protection module electrically connected to the first Bluetooth low energy communication module; wherein, when When the first temperature protection module detects that the temperature of the first power control node is higher than a first temperature, the first power protection device provides an over-temperature warning signal to the first power control switch to regulate the The output power of the first power circuit, and the first power protection device provides a warning signal through the first Bluetooth low energy communication module to notify the second power protection device. For example, the smart grid protection method according to item 7 of the patent scope, wherein the first low-power Bluetooth communication module and the second low-power Bluetooth communication module communicate using the Bluetooth communication protocol 4.0 or the Bluetooth communication protocol 5.0 .

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