KR100637627B1 - Both transformer power load monitoring and watt meter reading remote control system - Google Patents

Abstract

A remote monitoring system is provided to collect late-night load data, day-time load data, and a peak time of an electric power meter by synchronizing a clock in the power meter with a clock in a collecting unit. A remote monitoring system capable of managing load on a transformer and measuring usage of the transformer includes an area controller, a sector controller, and a power meter, which are networked via PLC. An OS(Operating System) is embedded in a microcontroller(300). The area controller includes the microcontroller, an SRAM(Static Random Access Memory) memory(304), a PLC(Power Line Communication) modem(309), and a transformer. Measured data from power meters in consumer houses are collected at predetermined time intervals. Current load data of the transformer is formed without using a separate current detector. A clock of the area controller is synchronized with a clock in the power meter in real time.

Description

{Both transformer power load monitoring and watt meter reading remote control system}

      1 is an overall system configuration of the present invention

      2 is a diagram illustrating a mutual communication scheme of the present invention.

      3 is an internal block diagram of an area controller applied to the present invention

      4 is an internal block diagram of a sect controller applied to the present invention.

      5 is an internal block diagram of a consumer modem applied to the present invention

      6 is a configuration diagram of a data format of a protocol applied to the present invention.

      7 is a flowchart illustrating load current data generation applied to the present invention.

      <Explanation of symbols for the main parts of the drawings>

      101: meter reading center 102: mobile communication network

      103: Area Controller 104: Sector Controller

      105: customer modem 201,202: mobile communication

      203: Near field communication 204: PLC communication

      300,400,500: microcontroller 301: mobile communication module

      302,401: Near field or wireless communication module 303,403,503: Power part

      304,404,504: memory 305,405,505: clock control

      306,406: Voltage detector 309,402,501: PLC communication module

502: check meter usage 506: check power failure

      According to the present invention, a power line communication (PLC) is performed in each concentrator (area controller, sector controller) in the second lane of the transformer without installing a separate current detector (CT) in the second lane of the transformer. Collects and adds meter reading data of subscribed consumer electricity meter every 15 minutes every time to generate load current data of transformer, and all transformers by using real time update (RTC, Real Time Clock) function which transmits incidentally in mobile communication Measures the load data of the transformer without the need of a current transformer (CT) to maintain and update the clock of the concentrator (area controller, sector controller) and the consumer electricity meter in the second lane of the real time in real time. As a remote management system that can accurately collect the meter reading data in real time,

      The communication between the transformer and the customer's electricity meter should be made by PLC and the communication between the transformer and the meter reading center of the electric power company should be a network combining mobile communication and wireless.

      Conventional techniques for monitoring loads on transformers include transformers under "Transformer Load Wireless Transmission System" (Publication 10-2000-0049416) and "Integrated Overload Monitoring System Using Low Power Wireless Modem of Column Transformer" (Registration 20-0264707). The load current detection device is installed on the secondary line and the load data is collected, and the remote management for integrating the load monitoring of the transformer and the meter reading of the transformer is transmitted and received by the PLC between the transformer and the customer's electricity meter. system "(Publication 10-2003-0029381) and" capital of a gas meter, with a built-in power meter S. IU integrating process the emergency and security "(Publication 10-2003-0075263) After the current detection device to the second line of the transformer The load monitoring systems of all transformers and distribution lines, such as the collection of load data, have a current detector on the secondary line of the transformer.

      The conventional technology described above has the advantage of scientifically managing the quality of electricity while cutting off the complaints caused by the reduction of meter manpower, misreading or unreading, but detecting current that is expensive in the secondary line of the transformer. By separately configuring the devices, the cost of constructing the remote management system is high and the devices are complicated.

All the electricity meters used by the utility company have a clock function, and the high voltage electricity meter and the large low voltage electricity meter have a demand meter function, and the clock of the attached electricity meter causes an error over time. Therefore, the peak time of the customer's electricity meter and the constant load data and the night load data of the midnight electricity meter are not accurately read in real time.

      Applicant's registered invention "Remote management system that integrates load monitoring of the transformer and meter reading of the electricity meter" to improve the present invention in applying the above-described remote management system of the integrated function, the current detection device in the secondary line of the transformer Instead of configuring an area controller or a sector controller with a DC power output unit, a microcontroller with a built-in operating program, a PLC modem and an S-RAM memory, the area controller section controller collects meter reading data of a consumer electricity meter by PLC communication. In case of collecting meter data of customer electricity meter by non-PLC method such as RF, it is impossible to recognize which transformer's secondary meter is subscribed to secondary line of the transformer. Therefore, load data for each ABC phase should be collected without a separate current detector. Can't.

      Also, in order to accurately and effectively collect transformer load management and meter reading data, it is necessary to use the Real Time Clock (RTC) function that is transmitted side by side in mobile communication to keep the clocks of all transformers and consumer electricity meters updated in real time. need.

      The present invention has been made to solve the problems of the prior art as described above,

      In order to detect the current load data of the transformer without the need for a separate current detector, the network between the transformer's two-lane concentrator and the customer's electricity meter must be PLC communication. Real-time update (RTC) function which is composed of one network and transmits from the mobile communication to maintain the real time of the transformer second line concentrator and the meter's clock in real time, so that the load current data of the transformer, peak time of the customer's meter, The objective is to provide a remote management system that integrates the load management of transformers and the meter readings, which collects the constant load data of the midnight electricity meter and the midnight load data in real time.

      The configuration and operation of the present invention will be described below with reference to a network based on CDMA + RF + PLC. In describing the configuration and operation, descriptions of related well-known functions or specific configurations will unnecessarily obscure the gist of the present invention. If it can be determined that detailed description will be omitted.

      The present invention has a built-in power supply unit 301, voltage detection unit 306, mobile communication modem 301, RF modem 302, PLC modem 309, the operating program output to the secondary line of the column transformer Area controller 103, which is a base station that collects load data of a transformer and meter reading data of a consumer electricity meter which is supplied with power from the transformer as a device capable of operating mobile communication, RF, and PLC by interfacing with two microcontrollers 300. Power supply unit 403, voltage detection unit 406, and RF data communication by meter reading center 101 and mobile communication 202 and outputting DC power to secondary lines of columnar transformers adjacent to area controller 103 The Sector Controller 400 is provided with a device capable of interfacing the RF 203 and the PLC 204 with a single microcontroller 400 having a modem 401, a PLC modem 402, and an operation program. The area controller and 103 are connected to Data communication is performed by the PLC with the customer electricity meter which is supplied with power from the transformers to collect meter reading data, and the meter data is collected and summed from the customer electricity meter every 15 minutes. By using as load current data, it is possible to measure the load current of the transformer secondary line without installing a separate current detector (CT) in the transformer secondary line.

      In addition, since the demand meter function is added to the low-voltage electronic electricity meter with a large capacity, the electricity meter with the demand meter function is required without collecting and summing the meter data every predetermined time (every 15 minutes). It can be more effective to add the current meter data of the transformer by adding the record of the demand meter added to the electricity meter supplied from the transformer.

      Referring to the system configuration of Figure 1 and the communication method of Figure 2 cross-referenced,

     A PLC (Power Line Communication) modem 105 is attached to the electricity meter of consumers receiving power from the same transformer, and the area controller 103 or the sect controller 104 attached to the transformer transmits / receives the PLC communication method 204. The meter data of the electricity meter is collected and the sect controller 104 transmits the meter data of the consumer electricity meter to the area controller 103 together with the load data of the transformer.

      The area controller 103 transmits and receives the stored transformer load data and the meter reading data by the mobile communication network 202 according to the information request of the meter reading center 101.

      3 is a configuration of the area controller 103 of the base station, the microphone controller 300 with the device operation program built therein while receiving DC power required for operation from the power supply unit 303 outputted from the transformer secondary line and rectified to DC power. It transmits and receives through the center 101 and the mobile communication modem 305, and transmits and receives with the Sector controller 104 by the RF (203).

      The information includes real-time update (RTC) input, which is transmitted incidentally in mobile communication, and updates the built-in clock in real time, and loads data of its own transformer and S-RAM, which is a data storage device with the same information of the transformer of the sect controller. Temporarily stored in the memory 404 and immediately notify the meter reading center 101 when an error occurs in the voltage current.

      The area controller 103 or the sect controller 104 attached to the secondary line of the transformer is a meter reading of the consumer electricity meter collected by the PLC modem 501 and the PLC communication 204 of the electricity meter of the consumers powered from the same transformer. S-RAM, which is a data storage device, loads data of a transformer consisting of load current data generated by collecting and summing meter reading data from a customer's electricity meter every 15 minutes and a predetermined time (every 15 minutes). Stored in 304 and 404, the sect controller 104 transmits meter data of the customer's electricity meter to the area controller 103 together with the load data of the transformer.

      The area controller 103 transmits and receives the load data of the transformer and the power consumption meter reading data of the customer according to the information request of the meter reading center 101 through the mobile communication network 202.

      The microcontroller 300, in which the device operation program of the area controller 103 is embedded, receives the power required for operation from the power supply unit 303 outputted from the secondary line of the transformer and rectified by DC power and sent from the meter reading center 101. Is received through the mobile communication modem 301 and transmitted to the sector controller 104 via the RF modem 302.

      The information at this time includes a real-time update input that is incidentally transmitted in the mobile communication, and the area controller 103 updates the built-in clock in real time, and stores data together with the same information of the load data of the transformer and the transformer of the sector controller. In the S-RAM memory 304 temporarily stored, if an abnormality occurs in the load of the transformer, interrupts immediately and stops the work such as collecting the reading data and notifies the reading center of the alarm.

      4 is a configuration of the sector controller 104, the microcontroller 400 in which the device operation program is built-in area controller while receiving the DC power required for operation from the power supply unit 403 outputted from the transformer secondary line and rectified by DC power Information received from 103 is received by RF and transmitted / received by a PLC modem 402 to a consumer electricity meter that receives power from the transformer. The information at this time includes a real-time update input transmitted through the area controller in the mobile communication, and the sect controller 104 updates the built-in clock in real time and collects and sums meter reading data every predetermined time (every 15 minutes) from the customer electricity meter. The load data of the transformer consisting of the generated load current data and the load voltage data measured in the second lane of the self-transformer is temporarily stored in the S-RAM memory 404 which is a data storage device, and according to the information request of the area controller 104. If an error occurs in the current, voltage, or the like, the alarm is notified to the meter reading center 101 via the area controller 104 immediately.

      That is, as shown in the load current data generation flowchart of FIG. 7, the microcontrollers of the area controller and the sect controller have 15-minute reading data collected from all the customer wattmeters belonging to the transformer, and the load data of the transformer is added. When the capacity is exceeded, an interrupt is immediately issued to notify the meter reading center and the record is saved.When the capacity is within the capacity of the transformer, it is compared with the stored peak time load data and the minimum load data. The highest and lowest load data is notified to the metering center at the time of collection of metering data for regular monthly electricity charges.

      5 is a configuration of the customer modem 105, the microcontroller 400 in which the device operation program is embedded, the information and the customer from the area controller 103 and the sector controller 104 while receiving the DC power required for operation from the power supply unit The information of the electricity meter is transmitted and received by the PLC when requested by the area controller and the sector controller. At this time, the information includes a real time lock (RTC) input that is incidentally transmitted in the mobile communication sent through the area controller and the sector controller, and the received microcontroller 500 updates the clock of the electricity meter in real time. .

      If a power failure is detected, the backup power (battery) is connected from the power supply unit 503 to store the current information in the EEPROM memory 504 against the power failure, and then enter the saving mode. When the power is supplied again, the device is updated with the information in the memory. Then return to normal.

      In the present invention, reference numerals 305, 405, and 505 as lower peripheral devices are clock generators for generating a microcontroller driving clock signal, and a clock control unit having an electronic timer function, and a display 507 receives a signal output from a microcontroller and receives data and status. Is a display device that displays and displays the digital output on LCD screens such as LCD and LED.

      FIG. 6 is a format of data constituting a protocol required for the devices to communicate with each other. The power company's point 601, an area controller 602 managed by one point, and a sector controller 603 managed by one area controller are shown in FIG. ), Division of tasks such as serial number and time calibration of customers managed by one area controller or sector controller (normal reading, specific meter reading, transformer status) (605), whether to send from top to bottom or from bottom to top A total of 24 bytes of a code 606 for discriminating whether to receive each step, actual data 607, and an error check 608 for checking the accuracy of the communication data are included.

      In this way, the metering data of the customer electricity meter registered for each phase is collected and summed every 15 minutes by PLC communication without installing an expensive current detector (CT) on the secondary line of the transformer. Real time update of the concentrators (area controllers, sector controllers) and customer power meters in the second lane of all transformers using the Real Time Clock (RTC) function, which generates load data and transmits incidentally in mobile communication. Maintain accurate and accurate collection of load data of transformer and meter reading data of customer electricity meter.

      In the present invention, the network between the transformer and the consumer electricity meter should be PLC and the network between the transformer and the meter reading center of the utility company should be configured as CDMA + RF as much as possible. Various substitution changes are possible, such as substituting CDMA with HFC, etc. without departing from the scope of the present invention, and the exemplary embodiments are not limited thereto.

      As described in the present invention, the meter reading data is determined from the customer modem (PLC) of the customer electricity meter added to each phase without separately installing a current cut device of the cut core method which is expensive in the secondary line of the transformer. Collecting, summing up every 15 minutes, or collecting and adding records of demand meters added to the customer's electricity meter to create a transformer's current load data, and constructing a remote management system that integrates the transformer's load management and meter reading As the cost is lowered, the technology and price advantage are compared with AMR by RF which has only the meter reading function, and the real-time update (RTC) function which is transmitted by mobile communication is used in the second lane of all transformers. By maintaining the clock of the concentrator and the electricity meter in real time, the load current data of the transformer and the peak time of the electricity meter of the consumer (Pe ak Time), it is possible to accurately collect the real-time load data and the night load data of the midnight electricity meter in real time.

Claims (1)

      In a remote management system that collects meter load data of a load management of a transformer consisting of power line communication (PLC) and a metering data of a consumer electricity meter, a network between a concentrator (area controller and a sector controller) in a secondary line of a transformer and a customer's electricity meter,       The concentrator (area controller sect controller) is connected to the secondary line of the transformer with a DC power output unit, a microcontroller with a built-in operating program, an S-RAM memory, a PLC modem, a communication modem connecting the transformer with the meter reading center of the power company. Comprehensive current detection by collecting and summing metering data every predetermined time (every 15 minutes) from customer power meters registered for each phase by power line communication (PLC) or collecting and recording records of demand meters of customer power meters Concentrators in the second lane of all transformers (area controllers, sectors) using the ability to generate current load data of transformers without a device (CT) and real-time update (RTC) function that transmits incidentally in mobile communication Load management of transformers and meter readings, characterized by keeping the clock of the controller) and the customer's electricity meter updated in real time. Integrated perform remote management systems.

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