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KR-102961593-B1 - A safety management system for power distribution panels

KR102961593B1KR 102961593 B1KR102961593 B1KR 102961593B1KR-102961593-B1

Abstract

The present invention utilizes voltage and current information within a switchboard to detect abnormal conditions occurring in various circuit breakers (main circuit breaker, control system circuit breaker, load system circuit breaker) installed within the switchboard and external loads connected to the switchboard, and determines the cause of the abnormal conditions. After determining the cause of the abnormal conditions, event information regarding the occurrence of abnormalities can be automatically transmitted to an external manager, thereby enabling the manager to quickly identify the cause of the circuit breaker short circuit and perform accurate and rapid recovery inspections, as well as providing the effects of stable operation and efficient maintenance of the switchboard. The invention is characterized by including a switchboard (100) and a safety management device (200).

Inventors

  • 안종율
  • 안태형

Assignees

  • 주식회사 이엘

Dates

Publication Date
20260507
Application Date
20260127

Claims (6)

  1. In the switchboard safety management system, A distribution board (100) comprising a main power breaker (110) that cuts off the main power supplied from the outside when an abnormality occurs, a control power breaker (120) that cuts off the power supply to control system components when an abnormality occurs, a plurality of load power breakers (130) installed for each load to cut off the power supply to the load when an abnormality occurs, and a CT (140) that measures the current of each phase (R, S, T phase) on the output side of the main power breaker (110) and provides the measured current data to a safety management device (200); The safety management device (200) installed in the distribution board (100) identifies the abnormal state of the external transformer (1) and the short-circuit state of the circuit breakers (110, 120, 130), generates abnormal event information when an abnormality occurs in the external transformer (1) or when a short circuit occurs in the circuit breaker, and transmits the abnormal event information to a manager in charge via an IoT communication network, The above safety management device (200) is, A voltage attenuator (210) that lowers the output voltage of the control power breaker (120) and applies it to the intelligent RTU (220), lowers the output voltage of the sluice gate load breaker (130) among the load breakers (130) and applies it to the intelligent RTU (220) without being connected to the output side of the main power breaker (110) so that the intelligent RTU (220) can directly monitor the output side voltage of the control power breaker (120) and the load power breakers (130), and lowers the output side S-phase voltage of the sluice gate load breaker (130) among the load breakers (130) and applies it to the intelligent RTU (220), and lowers the output side T-phase voltage of the pump load breaker (130) among the load breakers (130) and applies it to the intelligent RTU (220), and A switchboard safety management system characterized by including an intelligent RTU (220) that uses voltage drop applied through a voltage attenuator (210) and current data obtained from a CT (140) to identify the abnormal state of an external transformer (1), the short-circuit state of circuit breakers (110, 120, 130), and the cause of the short circuit of the circuit breakers, generates abnormal occurrence event information using the identified results, and transmits the abnormal occurrence event information to a manager in charge through an IoT communication network.
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  3. In claim 1, The above intelligent RTU (220) is, A plurality of voltage application ports (221) to which output voltage drop voltages of circuit breakers (120, 130) lowered by a voltage attenuator (210) are applied, and A current data input port (222) into which current data for each phase of the output side of the main power breaker (110) provided by the CT (140) is input, and A storage means (223) in which current data for each phase of the output side of the main power breaker (110) input through the current data input port (222) is stored in a time series, and information in which a plurality of voltage application ports and a plurality of breaker are mutually matched, rated operating current information of a control system component, and rated operating current information for each load are pre-stored, and A CPU (224) that uses voltages applied to a plurality of voltage application ports (221) and information stored in a storage means (223) to identify the abnormal state of the external transformer (1), the short-circuit state of the circuit breakers (110, 120, 130), and the cause of the short circuit of the circuit breaker, and uses the identified result to generate abnormal occurrence event information, and A distribution board safety management system characterized by including a communication unit (225) that transmits information on abnormal occurrence events to a manager in charge via an IoT communication network.
  4. In claim 3, The above CPU (224) is, If all voltages applied to the multiple voltage application ports (221) are zero, it is determined that the main power circuit breaker (110) is in a short-circuit state or the external transformer (1) is in an abnormal state, and using current data stored in a storage means (223) in a time-series manner, the characteristics of the change in current that flowed in each phase (R, S, T phase) on the output side of the main power circuit breaker (110) prior to the point in time when all voltages applied to the multiple voltage application ports (221) became zero are determined. If, as a result of the investigation, it is determined that normal current flows through each phase (R, S, T phase) on the output side of the main power breaker (110) and that just before the point when all voltages applied to the multiple voltage application ports (221) become zero, a surge overcurrent caused by a lightning strike flows through at least one of the phases (R, S, T phases) on the output side of the main power breaker (110), a first abnormal occurrence event information is generated that includes first abnormal information (abnormal state: main power breaker short circuit, abnormal cause: surge inflow, inspection target: main power breaker), and the generated first abnormal occurrence event information is transmitted to the breaker manager in charge through the communication unit (225). A switchboard safety management system characterized by generating second abnormal occurrence event information including second abnormal information (abnormal state: main power breaker short circuit or external transformer power supply interruption, cause of abnormality: main power breaker failure or external transformer failure, inspection target: main power breaker or external transformer), and transmitting the generated second abnormal occurrence event information to the transformer manager and the breaker manager through the communication unit (225).
  5. In claim 3, The above CPU (224) is, Among the plurality of voltage application ports (221), when a specific voltage application port with an applied voltage of 0 occurs, the circuit breaker matched to the specific voltage application port with an applied voltage of 0 is identified as a circuit breaker in a short-circuit state by using mutually matched information between the plurality of voltage application ports and the plurality of circuit breakers stored in the storage means (223), and if the circuit breaker identified as being in a short-circuit state is a control power circuit breaker (120), the change characteristics of the current that flowed on the output side R phase of the main power circuit breaker (110) prior to the point in time when the voltage applied to the specific voltage application port (221) became 0 are identified by using time-series current data stored in the storage means (223) and rated operating current information of the control system component. If, upon investigation, it is determined that an overcurrent relative to the rated operating current corresponding to the number of operating control system components flows just before the short circuit of the control power breaker (120) which was short-circuited while the rated operating current corresponding to the number of operating control system components was flowing on the output side R phase of the main power breaker (110), then a third abnormality event information is generated that includes third abnormality information (abnormal state: control power breaker short circuit, cause of abnormality: control system component failure, inspection target: control system component), and the generated third abnormality event information is transmitted to the manager in charge of the control system components through the communication unit (225). A distribution board safety management system characterized by generating a fourth abnormality event information containing fourth abnormality information (abnormal state: control power breaker short circuit, abnormal cause: control power breaker failure, inspection target: control power breaker) when, upon detection, it is determined that the rated operating current corresponding to the number of operating control system components has flowed on the output side R of the main power breaker (110) up to the point just before the short circuit of the short-circuited control power breaker (120), and transmitting the generated fourth abnormality event information to the breaker manager through the communication unit (225).
  6. In claim 3, The above CPU (224) is, Among the plurality of voltage application ports (221), when a specific voltage application port with an applied voltage of 0 occurs, the circuit breaker matched to the specific voltage application port with an applied voltage of 0 is identified as a circuit breaker in a short-circuit state by using mutually matched information between the plurality of voltage application ports and the plurality of circuit breakers stored in the storage means (223), and if the circuit breaker identified as being in a short-circuit state is a load power circuit breaker (130), the change characteristics of the current that flowed in each phase (R, S, T phase) on the output side of the main power circuit breaker (110) prior to the point when the voltage applied to the specific voltage application port (221) became 0 are identified by using time-series current data and load-specific rated operating current information stored in the storage means (223). If, upon investigation, it is determined that a rated operating current corresponding to the number of operating loads flows in at least one of the output phases (R, S, T phases) of the main power breaker (110), and just before the short circuit of the short-circuited load power breaker (130), an overcurrent relative to the rated operating current corresponding to the number of operating loads flows, then a fifth abnormality event information is generated that includes fifth abnormality information (abnormal state: short circuit of the load power breaker, cause of abnormality: load failure, inspection target: identification information of the load connected to the short-circuited load power breaker), and the generated fifth abnormality event information is transmitted to the manager in charge of the corresponding load through the communication unit (225). A distribution board safety management system characterized by generating a sixth abnormality event information containing sixth abnormality information (abnormal state: short circuit of load power breaker, cause of abnormality: failure of load power breaker, inspection target: identification information of short-circuited load power breaker) when, upon detection, it is determined that the rated operating current corresponding to the number of operating loads has flowed to each phase (R, S, T phase) on the output side of the main power breaker (110), up to the point just before the short circuit of the load power breaker (130), and transmitting the generated sixth abnormality event information to the breaker manager through the communication unit (225).

Description

A safety management system for power distribution panels The present invention relates to a switchboard safety management system, and more specifically, to a technology for a switchboard safety management system that utilizes voltage and current information within a switchboard to detect abnormal conditions occurring in various circuit breakers (main circuit breaker, control system circuit breaker, load system circuit breaker) installed within the switchboard and external loads connected to the switchboard, determines the cause of the abnormal conditions, and automatically transmits event information regarding the occurrence of abnormalities to an external manager. With the recent increase in the scale and sophistication of industrial sites, various types of industrial facilities are being installed and operated. To stably distribute and supply power to these facilities, distribution panels are installed and operated at each industrial site. These distribution panels are equipped with a main power breaker that interrupts (supplies/cuts off) external commercial power, a load power breaker that interrupts (supplies/cuts off) power supply to industrial loads, and a control power breaker that interrupts (supplies/cuts off) power supply to control system components (such as relays). In this situation, circuit breakers installed in the distribution panel short-circuit to cut off the power supply in the event of an abnormality. These short circuits are caused by malfunctions resulting from internal issues or by abnormalities in the loads or control system components connected to the breaker. If a short circuit persists for an extended period, it can lead not only to a failure of the distribution panel itself but also to serious problems such as production stoppages, property damage due to equipment failure, operational system paralysis, and safety accidents caused by the interruption of power supply to industrial facilities. Consequently, there is an increasing need for the development of technologies that can reliably manage the condition of circuit breakers installed in distribution panels and respond rapidly in the event of an abnormality. Furthermore, conventional switchboard management technology was limited to detecting whether a circuit breaker was tripped and providing a simple alarm signal in the event of a short circuit. Consequently, it was impossible to clearly determine whether the cause of the short circuit lay within the breaker itself or with the load or control system components. Additionally, the inefficient management of switchboards, where managers inspected the entire switchboard and load collectively whenever a short circuit alarm was triggered, resulted in repeated unnecessary inspections during the field process, leading to significant time and cost expenditures and hindering prompt restoration to normal operation. Therefore, there is a need for the development of technology that enables rapid identification of the cause of the circuit breaker short circuit and prompt restoration inspection. The present invention addresses the aforementioned problems and needs, and proposes a technology for a switchboard safety management system that utilizes voltage and current information within the switchboard to detect abnormal conditions occurring in various circuit breakers (main circuit breaker, control system circuit breaker, load system circuit breaker) installed inside the switchboard and external loads connected to the switchboard, determines the cause of the abnormal conditions, and automatically transmits event information regarding the occurrence of the abnormality to an external manager. The following are prior art related to this. FIG. 1 is an overall configuration diagram of the present invention. FIG. 2 is a detailed configuration diagram of the present invention. FIG. 3 is a detailed configuration diagram of the safety management device of the present invention. FIGS. 4, 5, and 6 are explanatory diagrams of the CPU of the present invention generating abnormal occurrence event information. Embodiments of the present invention will be described in detail with reference to the attached drawings. The present invention, a switchboard safety management system (hereinafter referred to as the present invention), utilizes voltage and current information within the switchboard to detect abnormal conditions occurring in various circuit breakers (main circuit breaker, control system circuit breaker, load system circuit breaker) installed within the switchboard and external loads connected to the switchboard, and determines the cause of the abnormal conditions. Afterward, it can automatically transmit event information regarding the occurrence of abnormalities to an external manager, thereby providing the effect of enabling the manager to quickly identify the cause of the circuit breaker short circuit and perform accurate and rapid recovery inspections, as well as the effect of stable operation and ef