KR20030029381A - Both transformer power load monitoring and watt meter reading remote control system - Google Patents

Abstract

PURPOSE: A remote control system performing load monitoring of a transformer and meter inspection of a power meter integratively is provided, which economizes meter inspection cost and manages voltage and load control scientifically. CONSTITUTION: A PLC(Power Line Communication) modem(105) is attached to power meters of houses supplied with power from the same transformer, and an aerial controller(103) or a sector controller(104) attached to the transformer checks a meter of the power meter of the houses by receiving/transmitting through PLC communication method. The sector controller transmits the meter inspection result of the house together with voltage and current and temperature measurement data to the aerial controller. The aerial controller receives/transmits the stored voltage, current measurement data and meter inspection data through a mobile communication network(102) according to information request of a meter inspection center(101).

Description

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

The present invention not only remotely reads the amount of electricity used but also organically configures the advantages of mobile communication, local or regional wireless communication, and power line communication by measuring voltage and load of the transformer. Remote metering of many consumer meters powered by voltage and load management and their transformers allows for cost-effective, low-cost manpower savings, proactive blocking of complaints caused by misreading or unreading To manage it.

Conventional metering method has been the most primitive method to visit the customer of the meter reader to book the usage of the meter one by one, but there are many problems, the meter reading by telephone line, remote meter reading system, mobile meter reading system, power meter reading Various alternatives, including systems, have been tried.

The short range wireless metering system has no effect of reducing the manpower, while the metering system based on mobile communication has a high modem cost and royalties due to CDMA royalties. Communication has also been a problem of low reliability and expensive device construction. For this reason, it is difficult to adopt short-range, mobile communication, and power line metering system exclusively. Therefore, for the high-voltage consumer who consumes a lot of power, the remote metering by mobile communication has been commercialized. to be.

In addition, due to the rapid increase in power demand due to the explosion of information equipment and air-conditioning equipment, it is difficult to forecast demand and voltage management of transmission and distribution lines and transformers, so that employees of power companies can carry out pocket tests to test constant voltage. The system is equipped with an alarm transmitter and a device for measuring voltage, current, and temperature of a pole transformer by short range wireless communication.

The present invention has been made to solve the above-mentioned problems, and the metering cost by performing the meter reading of the power consumption in parallel with the advantages of mobile communication, short-range or regional wireless communication, power line communication organically combined To save energy and manage voltage and load management scientifically.

Power supply unit and mobile communication terminal which output DC power to the secondary line of columnar transformer, local or local wireless communication modem and one microcontroller with built-in voltage, current, temperature measuring device and unique protocol. In addition, by attaching a communication device that can operate by interfacing the PLC communication module, a base station for remote metering and power measurement of voltage and current is installed, and voltage, current, and temperature are measured for each time period of the transformer. In addition, the power consumption of the consumer meter receiving power from the transformer is read by the power line communication method, and the columnar transformers and the adjacent columnar transformers perform the same function as the base station columnar transformers by performing data communication by local or local wireless communication. will be.

1 is an overall configuration diagram 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 sector controller according 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 showing the operation between the system and each device of the present invention.

<Description of the 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 or regional wireless communication module 303,403,503: Power unit

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

306,406: Voltage check 307,407: Current check

308,408: Temperature check 309,402,501: PLC communication module

502: check meter usage 506: check power failure

Detailed description of the configuration of the present invention by the accompanying drawings as follows, when the description of the known function or specific configuration related to the description of the present invention may unnecessarily obscure the subject matter of the detailed description Omit.

The present invention is a power supply unit that outputs DC power to two-phase column transformer and mobile communication terminal and local or local wireless communication modem and voltage, current, temperature measuring device and one microcontroller with a built-in protocol. A device capable of operating by interfacing wireless communication and PLC communication modules to install a base station for remote measurement management of voltage and current and remote metering of power consumption, and to remotely measure voltage, current, and temperature by time of transformer by date In addition, the power consumption of the consumer electricity meter received from the transformer is remotely read by the PLC communication method, and data communication is performed between the base station main transformer in which the mobile communication terminal is installed and the adjacent main transformers by local or local wireless communication. Remote management and customer power meter of same transformer as base station column transformer It is configured to be able to implement remote reading of power consumption.

Referring to the system configuration of FIG. 1 and the communication method of FIG. 2, an area controller attached to a transformer by attaching a PLC (Power Line Communication) modem 105 to a wattmeter of consumers receiving power from the same transformer ( 103 or the sector controller 104 transmits and receives by the PLC communication 204 method to read the customer's power consumption, and the sector controller 104 reads the customer's power usage metering content together with the voltage, current, and temperature measurement data of the transformer. It transmits to the area controller 103. The area controller transmits and receives the stored voltage, current measurement data, and power consumption meter reading data through the mobile communication network 102 in accordance with the information request of the meter reading center 101.

3 is a configuration of the area controller 103 of the base station, the micro-controller 300 with the device operation program is built-in while receiving the DC power required for operation from the power supply unit 303 outputted from the transformer secondary line and rectified by DC power Information received from the center 101 is received through the mobile communication module 301 and transmitted to the sector controller 104 through the local area communication or the local wireless communication module 302. The information at this time includes the update input 305 of the time that is incidentally transmitted in the mobile communication, and the same information as the transformer of the sector controller 104 by digitizing (306, 307, 308) analog values such as voltage, current, and temperature of the own transformer. The data is temporarily stored in the S-RAM memory 304, which is a data storage device, and an alarm is immediately notified to the meter reading center 101 when an abnormality occurs in voltage, current, temperature or the like.

4 is a configuration of the sector controller 104, the microcontroller 400 in which the device operation program is embedded receives the DC power required for operation from the power supply unit 403 outputted from the secondary line of the transformer and rectified by DC power. Information received from the 103 is received from the local or local wireless communication module 401 and transmitted and received through the PLC communication module 402 and the consumer electricity meter which is supplied with power from the transformer. The information at this time includes the update input 405 of the time transmitted through the area controller 103 in the mobile communication, and digitizes (406, 407, 408) analog values such as voltage, current, and temperature of its own transformer to the data storage device S. -Temporarily stores in the RAM memory 404 and transmits it according to the information request of the area controller 103, and when an abnormality occurs in voltage, current, temperature, etc., the alarm is notified to the meter reading center 101 via the area controller 103 immediately. do.

5 is a configuration of the customer modem 105, the microcontroller 500 in which the device operation program is built-in, while receiving the DC power required for operation from the power supply unit 503, the information sent from the sector controller 104 and the customer power meter Information 502 is transmitted and received through the PLC communication module 501 when requested by the sector controller 104. At this time, if the power failure is detected 506, the backup power (charger) is connected from the power supply unit 503 to store the current information in the EEPROM memory 504 in comparison with the power failure, and then enters the power saving mode and the power is supplied again the information in the memory After updating the device to return to normal status.

6 is a format of data constituting a protocol required for the devices to communicate with each other, a point 601 managed by a power supply company, an area controller 602 managed by one point, and a sector managed by one area controller. Serial number and time correction of the controller 603, the customer 604 managed by one sector controller, normal classification, specific meter reading, transformer status identification such as transformer status (605), step by step from the upper to lower or lower A total of 24 bytes of a code 606 for discriminating whether a step is received at a higher level, actual data 607, and an error check 608 for checking the accuracy of communication data are determined.

In addition, the microcontrollers 300, 400, and 500 are provided with a universal asynchronous receiver / transmitter (UART) as a serial communication processing device and are interfaced with respective modems.

The operation of the present invention will be described as follows.

7 is a flowchart illustrating the operation between the system and each device according to the present invention. As the meter reading operation program of the meter reading center is started 701, the standard time received from the mobile communication provider is transferred to each device (703) to operate the entire system. After controlling the time, the system enters normal operation while checking whether there is various emergency information (704). If an instruction including a business code is instructed to the selected area controller (705), the area controller receiving the request relays (706) sequentially or to the sector controllers. The tasked sector controllers independently perform the voltage and current measurement of the transformer's secondary lanes, the transformer's temperature measurement, and the meter's power usage metering. a, 708-b), which is divided into emergency notifications or information (709-a, 709-b) from the lower group to the upper group. The area controller or sector controller checks its transformer status while the task is in progress, and when an abnormality occurs (710-a, 710-b), interrupts (711-a, 711-b) to the upper group to pause the work that the upper group did. Stop and allow processing 704 in accordance with the emergency notification. If an abnormality occurs in the power meter that the customer modem also manages (710-c), the interrupt controller 712 is sent to the sector controller to continuously transfer to the upper group, so that the situation of all the customers managed by the meter office can be managed in real time. To help.

In addition, if necessary, the connection between the transformer and the transformer by a local or local wireless communication method may be omitted, and the local or local wireless communication module 302 between the base station transformer and the neighboring transformer may serve as a relay and transmit and receive relays between the transformer and the transformer. However, if communication is not possible even after trying a predetermined number of times of communication due to the failure of the communication module of the intermediate transformer, it is determined to be a failure and notifies the meter reading center 101 and then skips the transformer and continues to transmit and receive the next transformer.

As a base station transformer equipped with a mobile communication modem as a base station, the voltage, current, and temperature of the pole transformers are measured and monitored, and the meter is remotely read and received through a PLC method and a power meter of a customer receiving power from their transformers. Performs remote measurement of voltage and current of multiple transformers and remote meter reading of power consumption of many customers who receive power from their transformers by subscribing to local and local wireless communication methods with transformers. In addition, it is not only inexpensive, but also saves the voltage, current, and temperature of the transformer by date and time, that is, the black box of the transformer is made, which enables scientific electrical quality control.

Since the remote meter reading center is installed and operated by mobile communication for high-voltage customers, there is no need to build a separate system, and if the sum of loads measured by transformer and power consumption of customers are compared by season and time zone, It is possible to accurately measure the loss ratio, prevent the burnout of transformers, the source of the color of the conduction, and the demand forecasting of the voltage and load management and power transmission line.

It also provides a means to revolutionize equipment protection or customer care by alerting meter reading centers in the event of power failure, voltage abnormality or overload.

Claims (3)

In the telemetering management of the voltage and current of electric power and the remote metering system of electric power usage, the columnar transformers in the management of the metering center 101 are divided into a range of areas and outputted as DC power to the second lane of the columnar transformer as a reference. Power supply unit 303, microcontroller 300 with built-in protocol, mobile communication terminal 301, local or regional wireless communication modem 302, PLC modem 309, voltage current and temperature measuring device 306 (307) 308 is an area controller 103, which is a base station. The peripheral transformer includes a short-range or local wireless communication modem 401, a PLC modem 402, a voltage current and temperature measuring device 406, 407, and 408. And the sector controller 104 is configured to communicate with the meter reading center 101 and the area controller 103 of the base station transformer by the mobile communication 201, 202, the area controller 103 of the base station transformer, and the sector controller 104 of the peripheral transformer. ) Or local wireless communication ( 203, between the sector controller 104 of the transformer and the customer's electricity meter powered by the transformers, through the customer modem 105 to transmit and receive via the PLC communication method 204 and to a mobile communication subscription of one line. Remote monitoring and control of the voltage, current, temperature, etc. of the transformer in real time and the remote load of the transformer and meter reading of the electricity meter, characterized in that the meter is used to remotely read the power consumption of a plurality of consumers receiving power from the transformer Management system The load monitoring of the transformer and meter reading of the electricity meter according to claim 1, wherein one microcontroller with a built-in protocol is operated by integrating a wired / wireless integrated interface between mobile communication, short-range or regional wireless communication, and PLC communication module. Integrated remote management system The short-range or local wireless communication module between the base station transformer and the neighboring transformer serves as a repeater and relays the transmission and reception between the transformers and the transformers. If it is impossible, the remote management system that integrates load monitoring of the transformer and meter reading of the electricity meter, which is determined to be a failure and notifies the meter reading center, skips the transformer, and continues transmitting and receiving with the next transformer.