SYSTEM AND METHOD FOR SUPPLYING POWER TO TRANSMISSION TOWER USING OPTICAL POWER TRANSMISSION DEVICE AND METHOD FOR TRANSMITTING AND RECEIVING DATA USING THE OPTICAL POWER TRANSMISSION DEVICE

There is provided a system and method for supplying power to a transmission tower using an optical power transmission device including a transmission line, an optical power transmission device which is mounted on the transmission line and converts power obtained in the transmission line into an optical signal, a transmission tower, an optical power reception device which is mounted on the transmission tower and converts the optical signal into an electrical signal to supply power to various devices mounted on the transmission tower, and an optical fiber which has one end connected to the optical power transmission device and another end connected to the optical power reception device and transmits the optical signal of the optical power transmission device to the optical power reception device, wherein the optical fiber is insulated with an insulator string.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

Hereinafter, configurations of embodiments of the present invention are described in detail with reference to the accompanying drawings.

FIG. 1illustrates a configuration of a system for supplying power to a transmission tower using an optical power transmission device according to an embodiment of the present invention in a schematic, view. As shown inFIG. 1, the system for supplying power to a transmission tower using an optical power transmission device of the present invention includes an optical power transmission device100which is mounted on a transmission line10in a non-contact manner to obtain power in an electromagnetic induction manner, and then convert an electrical signal into an optical signal, an optical power reception device300which is mounted on a transmission tower20or the ground to convert the optical signal transmitted from the optical power transmission device100into an electrical signal, and a determined length of an optical fiber210which is used to transmit the optical signal from the optical power transmission device100to the optical power reception device300, wherein the optical fiber210is disposed in a determined length of an insulator220having one end fixed to the transmission line10and another end fixed to the transmission tower20.

FIG. 2illustrates a configuration of an essential portion of a system for supplying power to a transmission tower using an optical power transmission device according to an embodiment of the present invention in a schematic view. As shown inFIG. 2, the system for supplying power to a transmission tower using an optical power transmission device of the present, invention is configured to include an optical power transmission device100consisting of an AC power generator110which generates power in an electromagnetic induction manner, a non-contact power supply120which is supplied with the AC power generated from the AC power-generator110, and then converts the supplied AC power into DC power, an optical power transmitter130which is supplied with the DC power from the non-contact power supply120, and then converts the supplied DC power into a continuous wave laser signal, and an optical power transmission controller140which controls the optical power transmitter130that is operated after being supplied with the DC power from the non-contact power supply120; an optical power transmission portion200consisting of a determined length of an optical fiber210into which the continuous wave laser signal transmitted from the optical power transmitter130is coupled, and a determined length of an insulator220which accommodates the optical fiber210inside; and an optical power reception device300consisting of an optical power receiver310which converts the continuous wave laser signal coupled from the optical power transmitter130into an electrical signal, a power supply portion320which receives the electrical signal converted in the optical power receiver310to supply the received signal to various monitoring systems, a power controller330which controls a power supply of the power supply portion320, and an optical power reception controller340which is supplied with power from the power supply portion320and controls the optical power receiver310as well as the various monitoring systems400.

The AC power generator110is configured to generate AC power from the transmission line through an electromagnetic induction manner, wherein an output current remains constant rather than increasing in proportion to a current of a primary power line of the transmission line. The AC power generator110interposes an insulator between a transmission line and a magnetic core, so as to foe configured in a non-contact manner. Under the condition that a structure of the AC power generator110has an external diameter of 160 mm and a width of 200 mm, a secondary load power of 60 W may be obtained when a current of 50 to 1,000 A flows in the primary transmission line.

The non-contact power supply120converts AC power supplied from the AC power generator110into DC power through a rectifier circuit, etc. In order to transmit the DC power to the transmission tower, the optical power transmitter130converts the DC power into a continuous wave (CW) laser signal of 850 to 1,550 nm through a high power diode, and then couples the converted signal into the optical fiber210of the optical power transmission portion200. The optical power receiver310receives the continuous wave laser signal from the optical fiber210, and then converts the received optical signal into an electrical signal. The power supply portion320receives the electrical signal, which is converted by the optical power receiver310, and then supplies power to the various monitoring systems400.

FIG. 3illustrates a configuration of a system for supplying power to a transmission tower using an optical power transmission device according to another embodiment of the present invention in a schematic view. As shown inFIG. 3, the system for supplying power to a transmission tower using an optical power transmission device of the present invention is configured to include an optical power transmission device100consisting of an AC power generator110which generates AC power in an electromagnetic induction manner, a non-contact power supply120which has an overvoltage protection circuit121for protecting the non-contact power supply against over voltage generated from the AC power generator110and a rectifier circuit122for converting the AC power into DC power, an optical power transmitter130which has an optical power transmission driver module231for receiving the DC power from the non-contact power supply120to convert the received DC power into a continuous wave laser signal, and then couple the converted laser signal into an optical fiber, a controller140which controls the optical power transmitter130that is operated after being supplied with the DC power from the non-contact power supply120, a condition monitoring sensor170which monitors a transmission line and the optical power transmission device to generate monitoring data, a data transmitter and receiver150which has an optical transmitter and receiver module151for receiving the monitoring data from the condition monitoring sensor170, and then converting the received monitoring data into an optical signal to transmit the monitoring data to an optical power reception device300or receiving monitoring data transmitted from a monitoring system400mounted on the transmission tower, a controller140which processes the monitoring data transmitted from the optical transmitter and receiver module151or measurement data collected from the condition monitoring sensor170, and a communication device160which transmits the data processed in the controller140to an external superordinate network; an optical signal transmission portion200consisting of a determined length of an optical fiber210which is used to transmit the continuous wave laser signal coupled from the optical power transmission driver module131of the optical power transmission device100, an optical fiber230which is used to transmit the monitoring data transmitted from the monitoring system400mounted on the transmission tower to the optical transmitter and receiver module151in the data transmitter and receiver of the optical power transmission device100, and a determined length of an insulator220which accommodates the optical fibers210and230inside; and an optical power reception device300consisting of an optical power receiver310which has an optical-electrical signal conversion module311for converting the continuous wave laser-signal coupled from the optical signal transmission portion200into an electrical signal, a power supply portion320which receives the electrical signal converted in the optical power receiver310to supply the received signal to the various monitoring systems400, a power controller330which controls a power supply of the power supply portion320, a data transmitter and receiver350which has an optical transmitter and receiver module351for converting the monitoring data transmitted from the monitoring system400into an optical signal to couple the converted optical signal into the optical fiber230, or converting an optical signal transmitted from the optical power transmission device100through the optical fiber230into monitoring data to transmit the converted monitoring data, and a controller340which is supplied with power from the power supply portion320and controls the optical power receiver310as well as the various monitoring systems400.

In addition, a communication device500for receiving the monitoring data from the monitoring system400, and then transmitting the received monitoring data may be further included. Furthermore, a backup battery360connected to the power supply portion320may be further included.

The optical fiber210for transmitting an optical signal coupled from the optical power transmission driver module131of the optical power transmission device100to the optical-electrical signal conversion module311in the optical power receiver310of the optical power reception device300may be configured as unidirectional, while the another optical fiber230for transmitting an optical signal of monitoring data from the optical transmitter and receiver module351in the data transmitter and receiver35G of the optical power reception device300to the optical transmitter and receiver module151in the data transmitter and receiver150of the optical power transmission device100may be configured as bidirectional. The condition monitoring sensor170of the optical power transmission device100may include various sensors such as a current measurement sensor, a temperature sensor, a sag sensor, and a video camera. Also, the communication device160may include a wireless communication module and transmit data in the condition monitoring sensor170as well as monitoring data transmitted from the optical power reception device300from the wireless communication module to an external superordinate network through the controller140. Besides, the monitoring system400mounted on the transmission tower may include a fault diagnosing device, a lightning monitoring device, em aviation obstacle lamp device, a transmission tower monitoring device, other communication devices, etc.

The AC power generator110mounted on the transmission line in a non-contact manner obtains AC power through an electromagnetic induction power generating method, and then the rectifier circuit122converts the AC power into DC power after the AC power passes through the overvoltage protection circuit121of the non-contact power supply120. The DC power converted in the non-contact power supply120is supplied to the optical, power transmission driver module131. For power transmission, the DC power is converted into a continuous wave laser signal of 850 to 1,550 nm in the optical power transmission driver module131through a high power diode, and then coupled into the single-mode or multi-mode optical fiber210. The optical-electrical signal conversion module311of the optical power reception device300receives the continuous wave laser signal transmitted through the optical fiber210, and then converts the received optical laser signal into an electrical signal after amplification. The electrical signal converted in the optical-electrical signal conversion module311is transmitted to the power supply portion320, and the power supply portion supplies the power to various monitoring devices or the monitoring system400according to a control of the power controller330. Besides, the power may be supplied to the backup battery360so that the battery is recharged. The power that the optical power reception device300receives, for example, has a DC voltage of 33 to 5V and a current of 1 to 3 A, that is, reaches approximately 10 W, so that power more than 5 W, which is minimum dissipation power required in the monitoring system, can be supplied. Accordingly, because the optical power reception device300has to receive high power, a light receiving element with a high critical point is used. In addition, for optical power transmission, the multi-mode optical fiber may be configured to use one core as a parallel channel, and besides, the single-mode optical fiber may be used. Preferably, the optical fiber is longer than a minimum length of an insulator string used for a line of a transmission tower so that an insulation distance on an extra-high voltage overhead transmission line is secured.

Also, various monitoring devices of the monitoring system400are operated after being supplied with power from the power supply portion320, and controls the data transmitter and receiver. In addition, the monitoring data obtained in the monitoring system400can be transmitted to an external network through the communication device500. Furthermore, the controller140processes sense data obtained from various sensors in the condition monitoring sensor170of the optical power transmission device100, and then transmits the processed data to the communication device, and the communication device160can transmit the transmitted data to an external network.

As described above, according to the present, invention, Ac power generated from a transmission line in an electromagnetic induction power generating mariner is converted into DC power, and then the converted DC power is transmitted through an optical fiber which is connected between a transmission tower and the transmission line, has a jacket insulated with an insulator, and is free from an insulation breakdown, so that the transmitted power can be reliably and safely supplied to a monitoring system, etc. mounted on the transmission tower.

FIG. 4is a flow chart of a method for supplying power to a transmission tower using an optical power transmission device according to an embodiment of the present, invention. As shown inFIG. 4, the method for supplying power to a transmission tower using an optical power transmission device of the present, invention is configured to include, at an electromagnetic induction power generating means mounted on a transmission line in a non-contact manner, generating electrical power (S100), at a non-contact power supply, receiving the AC power generated from the electromagnetic induction power generating means and converting the received AC power into DC power (S101), at an optical power transmitter, converting the DC power into a continuous wave laser signal to couple the converted signal into an optical fiber (S102), and, at an optical power receiver mounted on a transmission tower, receiving the continuous wave laser signal transmitted through the optical fiber, and then converting the received signal into an electrical signal after amplification to transmit power to a power supply portion (S103).

In addition, the method may further include, at the power supply portion, supplying the power to a monitoring system according to a control of a power controller (S104), and transmitting monitoring data obtained in various monitoring devices of the monitoring system to an external device through a communication device (S105).

FIG. 5is a flow chart of a method for transmitting and receiving data using an optical power transmission device according to an embodiment of the present invention. As shown inFIG. 5, the method for transmitting and receiving data using an optical power transmission device of the present invention is configured to include, at an optical power reception device mounted on a transmission tower, receiving power transmitted from an optical power transmission device mounted on a transmission line, and then supplying the received power to various monitoring systems mounted on the transmission tower (S200), at the monitoring systems on the transmission tower, transmitting monitoring data to an optical transmitter and receiver module in a data transmitter and receiver of the optical power reception device (S201), at the optical transmitter and receiver module in the data transmitter and receiver of the optical power reception device, converting the monitoring data into an optical signal, and then coupling the converted optical signal into an optical fiber insulated with an insulator (S202), at an optical transmitter and receiver module in a data transmitter and receiver of the optical power transmission device mounted on the transmission line, receiving the optical signal transmitted through the optical fiber (S203), and, at the optical transmitter and receiver module in the data transmitter and receiver of the optical power transmission device, converting the received optical signal and transmitting the monitoring data to a communication device through a controller of the optical power transmission device (S204).

FIG. 6is a flow chart of a method for transmitting and receiving data using an optical power transmission device according to another embodiment of the present invention. As shown inFIG. 6, the method for transmitting and receiving data using an optical power transmission device of the present invention is configured to include, at a non-contact power supply of an optical power transmission device mounted on a transmission line, supplying power to an optical power transmitter, an optical transmitter and receiver module in a data transmitter and receiver, a condition monitoring sensor, and a communication device of the optical power transmission device (S300), transmitting monitoring data sensed in the condition monitoring sensor of the optical power transmission device on the transmission line to the optical transmitter and receiver module in the data transmitter and receiver of the optical power transmission device (S301), at the optical transmitter and receiver module in the data transmitter and receiver of the optical power transmission device, converting an electrical signal of the monitoring data into an optical signal, and then coupling the converted optical signal into an optical fiber insulated with an insulator (S302), at an optical transmitter and receiver module in a data transmitter and receiver of an optical power reception device mounted on the transmission tower, receiving the optical signal through the optical fiber (S303), and, at the optical transmitter and receiver module in the data transmitter and receiver of the optical power reception device, converting the received optical signal, and then transmitting the monitoring data to a communication device of the optical power reception device (S304).

According to the present invention, a system for supplying power to a transmission tower using an optical power transmission device which is mounted on a transmission line to transmit power obtained in an electromagnetic induction manner to a transmission tower has an effect that the obtained power is converted into an optical signal to be transmitted to the transmission tower through an optical fiber insulated with an insulator, and then an optical power reception device mounted on the transmission tower converts the optical signal into an electrical signal to supply the converted power to various devices, so that the power can be transmitted to the transmission tower in a highly reliable and safe state without an insulation breakdown or a short circuit of a connecting cable. In addition, the present invention has another effect that a variety of sense data sensed in the transmission tower can be transmitted with high reliability and safety using the optical power transmission device.

The above-described embodiments of the present invention are merely a part of various embodiments of the present invention. It is apparent that various embodiments included in technical ideas of the present invention in which AC power obtained in an AC power generator mounted on a transmission line of the present invention through an electromagnetic induction power generating method is converted into DC power, an optical power transmitter converts the DC power into an optical laser signal to transmit, the converted optical laser signal to an optical power receiver through a determined length of an optical fiber insulated with an insulator, and the optical power receiver converts the optical laser signal into an electrical signal to transmit the converted electrical signal to a power supply portion are within the scope of protection of the present invention.