Strong electric connection system based on adaptive adjustment of current protection threshold and adjustment method

Abstract

A high-voltage IoT system and regulation method based on adaptive adjustment of current protection thresholds are proposed. The system includes a main switch and several branch switches connected to the main switch, each branch switch connecting to several sockets. Real-time current detection units are installed inside the main switch, branch switches, and sockets. The main switch and branch switches are interconnected and wirelessly connected to a gateway via communication modules. Each socket is equipped with a wireless communication unit, and all wireless communication units are wirelessly connected to the gateway. Remote control mechanisms for opening and closing circuits are installed inside the main switch, branch switches, and sockets. The regulation method fully considers the protection thresholds of the main switch, branch switches, and sockets, hierarchical constraints, and the allocation of real-time current and remaining available current at the same level. This invention effectively solves the problems of contradictory current protection thresholds and large overload impact ranges in power control and protection equipment.

Description

Technical Field

[0001] This invention belongs to the field of low-voltage electricity, specifically relating to a high-voltage IoT system and adjustment method based on adaptive adjustment of current protection threshold. Background Technology

[0002] Control and protection in low-voltage electrical systems are generally achieved through switches in distribution boxes. The switches in the distribution box mainly include a main circuit switch and several branch circuit switches. The rated current of the main circuit switch is greater than that of the branch circuit switches, and it provides protection against overload and short-circuit faults in the circuit.

[0003] Typically, the sum of the rated currents of all branch circuit breakers exceeds the rated current of the main circuit breaker. In other words, it's possible for the main circuit breaker to overload even though none of the branch circuit breakers are overloaded. In this case, the main circuit breaker may trip due to overload, causing a widespread power outage with significant impact. On the other hand, electrical equipment is usually connected to sockets at the next level after the branch circuit breakers. The sum of the rated currents of all sockets may also exceed the rated currents of the branch circuit breakers. Therefore, it's also possible for the sockets to be normal while the branch circuit breakers are overloaded. In this case, either the branch circuit breaker or the main circuit breaker may trip due to overload, causing a widespread power outage. Summary of the Invention

[0004] The purpose of this invention is to address the problems of contradictions in the current protection thresholds of existing power control and protection equipment and the large range of overload impact. It provides a high-voltage IoT system and adjustment method based on adaptive adjustment of the current protection threshold, which can reduce the impact of fault clearing on other power lines and improve the stability of power supply under local overload conditions.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A high-voltage IoT system based on adaptive adjustment of current protection threshold includes a main switch and several branch switches connected to the main switch, wherein each branch switch is connected to several sockets.

[0007] The main switch, branch switches, and sockets are all equipped with real-time current detection units.

[0008] The main circuit switch and the branch circuit switches are interconnected and wirelessly connected to the gateway via a communication module; each socket is equipped with a wireless communication unit, and all wireless communication units are also wirelessly connected to the gateway.

[0009] The main switch, branch switches, and sockets are all equipped with remote-controlled opening and closing actuators.

[0010] Preferably, the real-time current detection unit employs a current sensor.

[0011] Preferably, the number of branch switches is 1 to 100, and the number of sockets connected to each branch switch is 1 to 500.

[0012] Preferably, the main circuit switch and the branch circuit switches are interconnected via wired or wireless communication; the main circuit switch and the branch circuit switches are connected to a communication module via wired or wireless communication.

[0013] Preferably, the wired communication uses 485 serial bus communication, and the wireless communication uses Wi-Fi, ZigBee, Bluetooth, or NFC communication.

[0014] Preferably, the wireless communication unit provided in the socket is a Wi-Fi unit, a ZigBee unit, a Bluetooth unit, or an NFC unit.

[0015] The present invention provides a method for regulating a high-voltage IoT system based on adaptive adjustment of current protection threshold, comprising the following steps:

[0016] Step 1: Detect the real-time current I of each branch switch. s1 …I sa ;

[0017] Step 2: Calculate the remaining usable current I in the total circuit using the following formula. zs :I zs =I n0 -(I s1 +…+I sa ), I n0 This is the rated current of the main circuit breaker;

[0018] Step 3: Calculate the remaining available current for each of the a branch switches in a loop. For example, for the m-th branch switch, determine I... nm -I sm Is it greater than I? zs I nm Let I be the rated current of the m-th branch circuit breaker. sm Let I be the real-time current of the m-th branch switch. nm -I sm >I zs Then the remaining available current I of the m-th branch switch m =I zs And if I nm -I sm ≤I zs Then the remaining available current I of the m-th branch switch m =I nm -I sm ;

[0019] Step 4: Calculate the remaining available current of the sockets connected to the a branch switches in a loop. For example, for the b socket connected to the m branch switch, detect the real-time current I of the socket. smb Determine I smb Is it less than or equal to I? nmb I nmb Let I be the rated current of the b-th socket under the m-th branch switch. smb ≤I nmb Then proceed to step 5, if I smb >I nmb Then, after a delay of t, I is judged again. smb Is it less than or equal to I? nmb If I smb ≤I nmb If I smb >I nmb The b-th socket under the m-th branch switch is tripped;

[0020] Step 5: For the b-th socket mb under the m-th branch switch, determine I. nmb -I smb Is it greater than I? m I m Let I be the remaining available current of the m-th branch switch. nmb -I smb >I m Then the remaining usable current I of the b-th socket under the m-th branch switch is... mb =I m If I nmb -I smb Less than or equal to I m , then I mb =I nmb -I smb Return to step 2 and execute steps 2 through 5 again.

[0021] Preferably, the value of t in step 4 is 0~600s.

[0022] Compared to existing technologies, this invention is a high-voltage IoT system based on adaptive adjustment of current protection thresholds. It controls several branch switches through a main switch, and each branch switch controls several sockets. This system structure balances the protection thresholds and hierarchical relationships among the main switch, branch switches, and sockets. Each main switch, branch switch, and socket is equipped with a real-time current detection unit, capable of calculating the real-time current and remaining available current allocation for each level. The main switch and branch switches are interconnected and connected to each socket via a wireless network. Each main switch, branch switch, and socket has a remote-controlled opening and closing mechanism, preventing localized faults from causing widespread power outages. This effectively solves the problems of contradictory current protection thresholds and large overload impact ranges in existing power control and protection devices.

[0023] Compared to existing technologies, the adjustment method of this invention, after the system is powered on, calculates the remaining available current of the main circuit by detecting the real-time current of each branch switch, then iteratively calculates the remaining available current of the branch switches, and so on, until the remaining available current of the sockets connected to the branch switches is calculated. Based on the calculated remaining available current, it determines which socket under which branch switch will trip. This adjustment method is simple to calculate and easy to operate. It fully considers the protection thresholds of the main switch, branch switches, and sockets, the hierarchical constraints, and the allocation of real-time current and remaining available current at the same level. It effectively solves the problems of contradictory current protection thresholds and large overload impact ranges in existing power control and protection equipment. Attached Figure Description

[0024] To more clearly illustrate the solutions in the embodiments of the present invention or the prior art, the accompanying drawings used are briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 The electrical structure diagram of the high-voltage IoT system based on adaptive adjustment of current protection threshold proposed in this invention;

[0026] Figure 2 The communication structure diagram of the high-voltage IoT system based on adaptive adjustment of current protection threshold proposed in this invention;

[0027] Figure 3 The flowchart of the adjustment method for a high-voltage IoT system based on adaptive adjustment of current protection threshold proposed in this invention. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The described embodiments are merely some, not all, of the embodiments of the present invention. It should be noted that, unless otherwise specified, the embodiments and features listed in the present invention can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] See Figure 1-2 The present invention proposes a high-voltage IoT system based on adaptive adjustment of current protection threshold, which includes a main switch and a branch switches connected to the main switch. Each branch switch is connected to several sockets, wherein branch switch 1 is connected to i sockets, branch switch 2 is connected to j sockets, ..., branch switch a is connected to k sockets.

[0030] In one embodiment, the number of branch switches is 1 to 100, and each branch switch connects to 1 to 500 sockets. The main switch and branch switches are interconnected via an RS-485 serial bus and connected to a communication module via the RS-485 serial bus, which wirelessly connects to the gateway. Each socket is equipped with a wireless communication unit, and all wireless communication units are wirelessly connected to the gateway. The communication module internally includes an RS-485 bus communication module and a Wi-Fi communication module. The wireless communication units in the sockets are Wi-Fi communication units, and the gateway is equipped with a Wi-Fi unit capable of interconnecting with the Wi-Fi communication module and Wi-Fi communication units. The main switch, branch switches, and sockets are all equipped with current sensors for real-time current detection; the main switch, branch switches, and sockets are all equipped with actuators for remote control of opening and closing.

[0031] See Figure 3 A method for regulating a high-voltage IoT system based on adaptive adjustment of current protection threshold includes the following steps:

[0032] Step 1: Power on the system and run it, then detect the real-time current I of each of the a branch switches. s1 …I sa ;

[0033] Step 2: Calculate the remaining usable current I in the total circuit using the following formula. zs :I zs =I n0 -(I s1 +…+I sa ), I n0 This is the rated current of the main circuit breaker;

[0034] Step 3: Calculate the remaining available current for each of the a branch switches in a loop. For example, for the m-th branch switch, determine I... nm-I sm Is it greater than I? zs I nm Let I be the rated current of the m-th branch circuit breaker. sm Let I be the real-time current of the m-th branch switch. nm -I sm >I zs Then the remaining available current I of the m-th branch switch m =I zs And if I nm -I sm ≤I zs Then the remaining available current I of the m-th branch switch m =I nm -I sm ;

[0035] Step 4: Calculate the remaining usable current of the sockets connected to the outgoing terminals of branch circuit switches a in a loop. For example, for the m-th branch circuit switch, which connects to km sockets, for the b-th socket connected to the m-th branch circuit switch, detect the real-time current I of the socket. smb Determine I smb Is it less than or equal to I? nmb I nmb Let I be the rated current of the b-th socket under the m-th branch switch. smb ≤I nmb Then proceed to step 5, if I smb >I nmb Then, after a delay of t, I is judged again. smb Is it less than or equal to I? nmb t takes values ​​from 0 to 600 s, if I smb ≤I nmb If I smb >I nmb The b-th socket under the m-th branch switch is tripped;

[0036] Step 5: For the b-th socket mb under the m-th branch switch, determine I. nmb -I smb Is it greater than I? m I m Let I be the remaining available current of the m-th branch switch. nmb -I smb >I m Then the remaining usable current I of the b-th socket under the m-th branch switch is... mb =I m If I nmb -I smb Less than or equal to I m , then I mb =Inmb -I smb Return to step 2 and execute steps 2 through 5 again.

[0037] The proposed invention provides a high-voltage IoT system and adjustment method based on adaptive adjustment of current protection threshold. It determines which socket under which branch switch to trip based on the magnitude of the remaining available current. It fully considers the protection thresholds of the main switch, branch switches, and sockets, the hierarchical constraints, and the allocation of real-time current and remaining available current at the same level. This effectively solves the problem of contradictory current protection thresholds and large overload impact range in existing power control and protection equipment.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the technical solution of the present invention in any way. Those skilled in the art should understand that, without departing from the spirit and principles of the present invention, the technical solution can be modified and replaced in several simple ways, and these modifications and replacements are all within the scope of protection covered by the claims.

Claims

1. A high-voltage IoT system based on adaptive adjustment of current protection threshold, characterized in that: It includes a main circuit switch and one or more branch circuit switches connected to the main circuit switch, each branch circuit switch being connected to one or more sockets; The main switch, branch switches, and sockets are all equipped with real-time current detection units. The main circuit switch and the branch circuit switches are interconnected and wirelessly connected to the gateway via a communication module; each socket is equipped with a wireless communication unit, and all wireless communication units are wirelessly connected to the gateway. The main switch, branch switches, and sockets are all equipped with remote-controlled opening and closing actuators. After the system is powered on, the real-time current of each branch switch is detected to calculate the total remaining available current. Then, the remaining available current of the branch switches is calculated cyclically. After the cyclic calculation of the remaining available current of the branch switches is completed, the remaining available current of the sockets connected to the outgoing terminals of the branch switches is calculated cyclically. Based on the calculated remaining available current, it is determined which socket under which branch switch is tripped.

2. The high-voltage IoT system based on adaptive adjustment of current protection threshold as described in claim 1, characterized in that: The real-time current detection unit uses a current sensor.

3. The high-voltage IoT system based on adaptive adjustment of current protection threshold according to claim 1, characterized in that: The number of branch switches is 1 to 100, and the number of sockets connected to each branch switch is 1 to 500.

4. The high-voltage IoT system based on adaptive adjustment of current protection threshold according to claim 1, characterized in that: The main circuit switch and branch circuit switches are interconnected via wired or wireless communication. The main circuit switch and branch circuit switches are connected to a communication module via wired or wireless communication.

5. The high-voltage IoT system based on adaptive adjustment of current protection threshold according to claim 4, characterized in that: The wired communication uses a 485 serial bus, while the wireless communication uses Wi-Fi, ZigBee, Bluetooth, or NFC.

6. The high-voltage IoT system based on adaptive adjustment of current protection threshold according to claim 5, characterized in that: The wireless communication unit installed in the socket can be a Wi-Fi unit, a ZigBee unit, a Bluetooth unit, or an NFC unit.

7. A method for adjusting a high-voltage IoT system based on adaptive adjustment of current protection threshold as described in any one of claims 1-6, characterized in that, Includes the following steps: Step 1: Detect the real-time current I of each branch switch. s1 …I sa ; Step 2: Calculate the remaining usable current I in the total circuit using the following formula. zs :I zs =I n0 -(I s1 +…+I sa ), I n0 This is the rated current of the main circuit breaker; Step 3: Calculate the remaining available current for each of the a branch switches in a loop. For example, for the m-th branch switch, determine I... nm -I sm Is it greater than I? zs I nm Let I be the rated current of the m-th branch circuit breaker. sm Let I be the real-time current of the m-th branch switch. nm -I sm >I zs Then the remaining available current I of the m-th branch switch m =I zs And if I nm -I sm ≤I zs Then the remaining available current I of the m-th branch switch m =I nm -I sm ; Step 4: Calculate the remaining available current of the sockets connected to the a branch switches in a loop. For example, for the b socket connected to the m branch switch, detect the real-time current I of the socket. smb Determine I smb Is it less than or equal to I? nmb I nmb Let I be the rated current of the b-th socket under the m-th branch switch. smb ≤I nmb Then proceed to step 5, if I smb >I nmb Then, after a delay of t, I is judged again. smb Is it less than or equal to I? nmb If I smb ≤I nmb If I smb >I nmb The b-th socket under the m-th branch switch is tripped; Step 5: For the b-th socket mb under the m-th branch switch, determine I. nmb -I smb Is it greater than I? m I m Let I be the remaining available current of the m-th branch switch. nmb -I smb >I m Then the remaining usable current I of the b-th socket under the m-th branch switch is... mb =I m If I nmb -I smb Less than or equal to I m , then I mb =I nmb -I smb Return to step 2 and execute steps 2 through 5 again.

8. The adjustment method according to claim 7, characterized in that: The value of t mentioned in step 4 is 0~600s.

Images