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KR-102963964-B1 - IoT-Based In-Unit Priority Load Shedding System for Blackout Prevention and Smart Grid Including It

KR102963964B1KR 102963964 B1KR102963964 B1KR 102963964B1KR-102963964-B1

Abstract

The IoT-based in-household load blocking system for preventing blackouts according to the present invention comprises: a remote switch controller (RSC) that is inserted into a power line leading to a group of earth leakage circuit breakers, which is installed in each household and consists of one or more earth leakage circuit breakers, and can block the power supply to a load connected to the lower part of the earth leakage circuit breaker group; and a control system (40) that controls the RSC of each household via a gateway, wherein the RSC of each household and the gateway (20) are connected via LoRa communication, and the control system (40) is characterized by ordering the RSC of each household to cut off power when the maximum demand power of the complex is less than 100% of the contracted power of the complex but reaches a preset ratio.

Inventors

  • 백승주

Assignees

  • 주식회사 지엠엔지니어링

Dates

Publication Date
20260513
Application Date
20250710

Claims (8)

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  2. RSC-1, which is installed in each household and inserted into the power line leading to a load connected to the first earth leakage circuit breaker, capable of interrupting the power supply to the load connected to the first earth leakage circuit breaker; RSC-2, which is installed in each household and inserted into the power line leading to a load connected to a second earth leakage circuit breaker, capable of interrupting the power supply to the load connected to the second earth leakage circuit breaker; RSC-3, which is installed in each household and inserted into a power line leading to a load connected to a third earth leakage circuit breaker, capable of interrupting the power supply to the load connected to the third earth leakage circuit breaker; and It is configured to include a control system that controls the RSC-1, RSC-2, and RSC-3 of each generation via a gateway, and The RSC-1, RSC-2, and RSC-3 of each generation and the gateway are connected via LoRa communication, and The above control system is, When the maximum demand power of the complex reaches the first set ratio of the complex's contracted power, it orders the RSC-1 of each household to cut off, and When the maximum demand power of the complex reaches the second set ratio of the complex's contracted power, it orders the RSC-2 of each household to cut off, and When the maximum demand power of the complex reaches the third set ratio of the complex's contracted power, order the RSC-3 of each household to cut off, The above-mentioned first setting ratio is smaller than the above-mentioned second setting ratio, the above-mentioned second setting ratio is smaller than the above-mentioned third setting ratio, and the above-mentioned third setting ratio is less than 100% of the complex contracted power, The in-household load is classified to include electric heating 1, electric heating 2, and electric heating 3, and The above RSC-1 can cut off the power supply to the above-mentioned electric heater 1, and The above RSC-2 can cut off the power supply to the above electric heater 2, and The above RSC-3 can cut off the power supply to the above-mentioned electric heater 3, and The above gateway is installed in each building of the complex, and Each of the above RSC-1, above RSC-2, and above RSC-3 is, Magnetic contactor inserted into the power path; A communication module that performs data transmission and reception with the above gateway using the LoRa communication method; A control unit comprising: a control unit that controls the magnetic contactor to block the power path when a blocking command is received through the communication module; IoT-based load blocking system to prevent blackouts.
  3. In claim 2, Each of the above RSC-1, above RSC-2, and above RSC-3 is, Periodically, after sending uplink communication to the above gateway, it opens a short downlink reception time slot and maintains sleep mode at other times, The above control system can transmit a sleep prohibition command to the RSC-1, the RSC-2, and the RSC-3, and the RSC-1, the RSC-2, or the RSC-3 that received the sleep prohibition command during the reception time slot does not enter sleep mode thereafter. IoT-based load blocking system to prevent blackouts.
  4. In claim 3, The above sleep prohibition order is, Triggered when the maximum demand power reaches a value smaller by the slip margin than the value corresponding to one of the first, second, or third setting ratios of the complex contracted power, IoT-based load blocking system to prevent blackouts.
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  8. A smart grid system comprising an IoT-based load blocking system that prevents blackout according to any one of claims 2 to 4.

Description

IoT-Based In-Unit Priority Load Shedding System for Blackout Prevention and Smart Grid Including It The present invention relates to a system for preventing blackouts in a power grid, and also to a smart grid including the same. A Smart Grid is an intelligent power grid that optimizes power supply and consumption in real time using information and communication technology (ICT), and includes a Smart Distribution Board that performs load monitoring and control within a household, an Advanced Metering Infrastructure (AMI) that transmits real-time usage measurement and control commands for each household, a Demand Response (DR) that predicts and adjusts the overall system load, a Fault Ride Through (FRT) that prevents the spread of faults, and section-by-section circuit breaker technology, and the present invention relates to the technology of Demand Response (DR) and the like among these. Existing apartment complexes prevent blackouts by shutting down entire buildings or the entire complex when there is a possibility of a blackout. However, this method cuts off even essential daily loads, causing inconvenience and confusion for users. To address this, one could consider installing a device in each household to cut off the load in advance when there is a possibility of a blackout. However, there are difficulties in establishing an efficient system, such as the expected increase in costs due to the additional installation of such devices, the difficulty of installing them in existing apartments, the fact that the devices in each household must be connected to a communication network, and the need for a constant power supply for these devices, which could cause power leakage. FIG. 1 illustrates an IoT-based in-house load blocking system that prevents blackouts according to a first embodiment of the present invention. FIG. 2 illustrates an IoT-based in-house load blocking system that prevents blackouts according to a second embodiment of the present invention. Figure 3 illustrates the detailed configuration of a remote switch controller used in an IoT-based in-household load blocking system that prevents blackouts. FIG. 4 illustrates an IoT-based load blocking system that prevents blackouts according to an embodiment. Figure 5 illustrates an example of reconfiguring wiring within a household to apply the IoT-based load blocking system for preventing blackouts according to the present invention more accurately and efficiently. FIG. 6 is a graph example illustrating an example in which an IoT-based load blocking system for preventing blackouts according to the second embodiment of the present invention blocks the load according to the ratio of the maximum demand power of the complex to the contracted power of the complex. FIG. 7 illustrates the detailed configuration of a blocking control module in an IoT-based load blocking system that prevents blackouts according to the third embodiment of the present invention. The IoT-based load blocking system for preventing blackouts according to the present invention serves as a unit component of a smart grid and as a component of load control or DR (Demand Response). Through a control system to be described later, it enables real-time status monitoring of each household via wireless communication such as LoRa, and automatic real-time response to prevent blackouts in the event of power peaks or failures. The IoT-based load-cutting system for preventing blackouts according to the present invention relates to electrical equipment control technology for preventing blackouts during power peaks, and in particular, is a system for remotely cutting off electric heating loads within households of multi-unit housing based on a wireless network, and is also a system for remotely cutting off electric heating loads within households of multi-unit housing based on importance using a wireless network. FIG. 1 illustrates an IoT-based in-house load blocking system that prevents blackouts according to a first embodiment of the present invention. The RSC-T is installed in each household and is inserted into the power line leading to a group of earth leakage circuit breakers (ELCB1, ELCB2, ELCB3) consisting of one or mainly multiple earth leakage circuit breakers (ELCB), and can interrupt the power supply to loads connected to the lower end of the earth leakage circuit breaker group. The RSC-T is a system-isolating type that interrupts all loads connected to its secondary side collectively via a remote signal. In the example, the loads of Electric Heater 1, Electric Heater 2, and Electric Heater 3 are connected to the RSC-T, so when the RSC-T interrupts the power line, the power supply to the loads of Electric Heater 1, Electric Heater 2, and Electric Heater 3 is interrupted. FIG. 2 illustrates an IoT-based in-house load blocking system that prevents blackouts according to a second embodiment of the present invention. RSC-1 is installed in each household and inserted into the power line leadin