KR100594778B1 - Tester for detection of 3-phase information, method of the detection and system thereof - Google Patents

Abstract

Phase information detecting device capable of detecting phases of mixed lines in transmission lines or distribution lines, and method and method for detecting phase information using the same, which are installed in substations and provide information on phases on distribution lines Is installed in the substation, and a plurality of line monitoring devices are provided for each distribution line for transmitting power from a peripheral pressure transformer to a plurality of secondary transformers, and the operator detects phase information of the distribution line at an arbitrary measurement location. And a relay station for relaying information between the phase information detecting device and the phase information detecting device and the main device by wired or wireless communication, wherein the phase information detecting device transmits information on the measured image and information on the authentication number of the phase information detecting device. Is transmitted to the main apparatus, and the main apparatus is connected to the distribution line of the corresponding substation according to the phase information transmitted from the phase information detecting apparatus. Information on via a relay station to provide a configuration for notifying the information by the detecting device.

By using the above-described phase information detection apparatus, the phase information detection method using the same, and the system, the operator can conveniently and accurately identify the phase determined from the power plant.

Transformer, Substation, Three Phase, Distribution Line, Line Monitoring

Description

Phase information detection device and method and system for detecting phase information using same {tester for detection of 3-phase information, method of the detection and system

1 is a schematic diagram showing the state of the peripheral voltage and the secondary transformer to which the present invention is applied,

2 is a block diagram showing a phase information detection system according to the present invention;

3 is a block diagram illustrating the configuration of the main apparatus shown in FIG. 2;

4 is a block diagram illustrating the configuration of the line monitoring apparatus shown in FIG. 2;

FIG. 5 is a block diagram illustrating an image information detecting device shown in FIG. 2;

6 is a view for explaining the concept of a phase state in the phase information detection system according to the present invention;

7 is an operation flowchart of a phase information detection system according to the present invention;

8 is a diagram illustrating a phase state in the phase information detection system according to the present invention.

Explanation of symbols on the main parts of the drawings

10: substation 20: peripheral pressure

30: main device 40: line monitoring device

60: remote control device 80: phase information detection device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting phase information, and a method and system for detecting phase information using the same, and in particular, a phase capable of detecting phases of a line mixed in a line length of a transmission line or a distribution line. An information detecting apparatus, a method of detecting phase information using the same, and a system thereof are provided.

In general, the power generated from hydro, thermal or nuclear power plants is defined in the generator (in this case, each phase of the three-phase power is defined as A, B, C phase, hereinafter "determined phase in the generator" is "cut off") In the middle stages of transmitting and distributing power with phase angles of P1, P2, and P3 to the final consumer side of home, office, factory, etc., the final consumer side is reached through the substation and transformer. The power generated by the power plant is usually supplied to the substation at high pressures of 154 kW, 345 kV or 765 kV, and the substation again depressurizes it to high pressure of 22.9 kW and supplies it to the transformer, which is just before the final consumer side, The transformer converts the voltage to 110V, 220V or 380V, which is suitable for use on the final consumer side and supplies it to the final consumer side.

As such a transformer, there are a column-type transformer installed in a pole and an underground distribution line transformer installed on the ground. Among these, the columnar transformer is relatively small in capacity, and therefore, is relatively small and light in weight, and is usually installed in a pole and the like to reduce the high pressure from the substation to a low pressure and supply it to the final consumer side. However, in crowded metropolitan areas, it is very dangerous to drag high-voltage (22.9 kW) distribution lines from substations through electric poles in crowded cities. Dragging (distribution line) and supplying power to the final customer through a transformer installed on the ground, that is, a transformer for underground distribution lines (pad transformer).

However, in the current distribution line, the ground section and the underground section are mixed in a positive way, and when the track is changed from the ground to the ground or in a crowded area of shops or buildings, the track is under construction. This problem is very difficult to manage, such as the load bias is likely to occur, and the load bias causes an unbalance, resulting in a loss of power or a deterioration of the power quality to the customer.

Also, underground cables have a large number of cables mixed in one tunnel, but finding an absolute phase among them is not accurate enough, and measurement is possible only within a short distance of about 2 km. It takes a long time.

An example of a method for detecting such a phase is disclosed in Korean Utility Model Publication No. 1996-8621, Utility Model Registration Publication No. 20-248186, and Korean Patent Application Publication No. 1999-4268.

However, in the technique disclosed in the above publication, a detector for detecting a phase for connecting to an instrument in accordance with a phase of a supply voltage at a high voltage consumer, a detection display for monitoring whether a high voltage flows on an incoming line of a transmission / distribution line or a load side line. It only discloses a device that monitors the load status of devices and underground distribution lines and detects the overload of transformers for underground distribution lines. However, no technique is disclosed for detecting the phase information of the lines within the positive distribution line. Did.

As such, in order to detect the phase of the track in the positive, it is necessary to keep the same for each phase until the end of the positive.However, it is difficult to apply realistically in the distribution line that is currently in operation. I had no choice but to.

However, the measuring instrument currently used to check the phase inputs an impulse signal on the power line and detects the electromagnetic field generated by the ID clamp to find the phase.The signal is measured according to the synthesized impedance of the distance and transformer. Because the attenuation is severe, it is impossible to check at a long distance of more than a few kilometers, so it is mainly used when checking the phase between the manhole and the manhole of the underground line. And, there was a problem that the operator always needs more than two for the operation of the transmitter.

In addition, the phase identification device currently in use is used in high-voltage lines (22,900V, etc.), so that the load management of the customer could not be systematically managed. Only the upper part of the situation was applied to the same connection.

In order to solve this problem reasonably, not only the high voltage line but also the low voltage line can be checked in the early stage, and if necessary, all the information on the phase (phase for each phase, presence of power, magnitude of voltage / current, Sag) , Swell, Flicker, 3rd harmonic, load, etc. Hereinafter, a device capable of immediately confirming such information as "all phase information", "phase information", and "phase information" was needed.

An object of the present invention has been made to solve the above-described problems, phase information detection device and phase information detection method using the same, which can confirm the information on the transmission and distribution line and the amount of power at any place of the positive and To provide that system.

It is another object of the present invention to reduce the manpower of the operator for recognizing the phase (phase) and all the information of the phase in the high-voltage line and low-voltage line, and the phase information detection device and phase using the same The present invention provides a method and system for detecting information.

In order to achieve the above object, the phase information detection system according to the present invention is a distribution line in any section between a peripheral voltage in a substation and a plurality of secondary transformers for supplying power to a final consumer side or between indoor wiring of a consumer. A phase information detection system for detecting phases, comprising: a main device installed in the substation and collecting information about phases on a distribution line, and installed in the substation, for power distribution from the peripheral voltage transformer to a plurality of secondary transformers. A plurality of line monitoring devices provided for each distribution line, a phase information detection device for the operator to detect phase information of the distribution line at an arbitrary measurement location, and relaying information between the phase information detection device and the main device by wired or wireless communication. And a relay station, wherein the phase information detecting device includes information on the measured phase and an authentication number of the phase information detecting device. The information is transmitted to the main apparatus via the relay station, and the main apparatus detects the phase information via the relay station on the information on the distribution line of the corresponding substation according to the phase information transmitted from the phase information detecting apparatus. Notification to the device is characterized.

In the image information detecting system according to the present invention, the main apparatus calculates an average delay time for which the image information transmitted from the image information detecting apparatus reaches the main apparatus.

In the phase information detection system according to the present invention, the main device transmits a command for requesting “PTD” information to the phase information detection device, and simultaneously pulses at a predetermined phase angle for each phase angle of 0 ° to 360 ° of a specific phase. It characterized in that to generate.

In the phase information detection system according to the present invention, when the phase information detection device receives a command for requesting the " PTD " information transmitted from the main device, the phase information detection device receives a number of 0 degrees to 360 degrees for the specific phase. The pulses are transmitted to the main device by a predetermined number of times at a period of 1 sec.

In the phase information detection system according to the present invention, the maximum frequency width of the pulse is 5.5 kHz or less.

In the phase information detection system according to the present invention, when the phase information detection device measures three phases, the specific phase is determined as the reference phase, and the remaining phases are the true phase (+ 120 °) and the ground (-120 °). It is characterized by determining according to).

In addition, the phase information detection method according to the present invention to achieve the above object in any section between the ambient voltage in the substation and a plurality of secondary transformer for supplying power to the final customer side or between the indoor wiring of the customer. In order to detect the phase of the distribution line, a phase device installed in the substation and collecting the information on the phase on the distribution line, and the phase information detection device using the phase information detecting device to detect the phase information of the distribution line at an arbitrary measurement location. A method for detecting information, the method comprising: [a] transmitting, by the phase information detecting apparatus, information on an image measured by the distribution line and information on an authentication number of the phase information detecting apparatus to the main apparatus via a wired / wireless communication network; b] determining, by the main apparatus, whether bidirectional communication conditions are possible according to the information transmitted from the phase information detecting apparatus, [c] both When the communication condition is satisfied, the main apparatus sends a command for requesting "PTD" information to the phase information detecting apparatus, [d] the phase information detecting apparatus requests "PTD" information from the main apparatus. When receiving a command, transmitting a pulse for the measured image to the main apparatus for a predetermined number of times; [e] the image measured by the phase information detecting apparatus according to the pulse transmission from the phase information detecting apparatus; And notifying the phase information detecting device of information on the phase of the distribution line of the corresponding substation.

In the phase information detecting method according to the present invention, after the step [f], the main apparatus calculates an average delay time for the phase information transmitted from the phase information detecting apparatus to reach the main apparatus. It characterized in that it further comprises.

In addition, in order to achieve the above object, the phase information detecting apparatus according to the present invention is provided in any section between the surrounding pressure in the substation and a plurality of secondary transformers for supplying power to the final consumer side or between the indoor wiring of the consumer. A phase information detection device installed in the substation and detecting a phase of a distribution line at an arbitrary measurement location through a main device collecting information on the phase on a distribution line, the phase information detecting device comprising: a detection unit detecting a voltage of each phase of the distribution line; A communication unit which communicates with the main apparatus by wire or wirelessly, means for transmitting PTD, which is phase information of a reference phase, based on a specific phase among the phases detected by the detection unit to the main apparatus through the communication unit, for the PTD information The number of transmission line numbers to be measured to the main device according to the response from the main device. And information on the phase of the distribution lines of the substation corresponding to the number of reference to said distribution line characterized by including means for receiving from the main device.

In addition, the phase information detecting apparatus according to the present invention is characterized by further comprising input means for inputting the number of the distribution line.

In addition, the phase information detecting apparatus according to the present invention is characterized by further comprising display means for displaying information on the phase of the distribution line received from the main apparatus.

In addition, the image information detecting apparatus according to the present invention is characterized in that it further comprises a storage means for storing the information displayed on the display means.

In order to achieve the above object, the phase information detection method according to the present invention generates and transmits a pulse at a position having a constant phase angle of any phase of one end of a power line, and detects the voltage of each phase at the other end of the power line, The pulse having the predetermined phase angle is received, and the received pulse is determined to have a constant delay time corresponding to n (n is a natural number) times one cycle of the waveform, and the constant delay time at the other end of the power line. Thereafter, the waveform corresponding to the predetermined phase angle is determined as the arbitrary phase.

Moreover, in the phase information detection method which concerns on this invention, the said pulse transmission is valid. It is characterized in that the transmission and reception via a relay station or wireless communication of the wireless communication.

In the phase information detection method according to the present invention, the predetermined delay time between the transmitted pulse and the received pulse has an error in a range less than the time of phase difference of each phase.

In the phase information detection method according to the present invention, the error is characterized in that the error is 5.5 dB or less.

The above and other objects and novel features of the present invention will become more apparent from the description of the specification and the accompanying drawings.

EMBODIMENT OF THE INVENTION Hereinafter, the structure of this invention is demonstrated according to drawing.

In addition, in description of this invention, the same code | symbol is attached | subjected to the same part and the repeated description is abbreviate | omitted.

First, prior to the description of the embodiment of the present invention, an underground distribution line will be described with reference to FIG. 1 as an example to which the present invention is applied.

1 is a view schematically showing the state of the main transformer and the secondary transformer to which the present invention is applied.

In general, secondary transformers for distribution lines currently used in the city center are installed as shown in FIG. 1.

That is, the high-voltage line transmitted from the power plant is transformed to 22.9 kV through the peripheral pressure transformer 2 in the substation 1, and then supplied to the secondary transformer 3 provided in the overhead line or underground in the city center, and the secondary transformer 3 ) Is converted into 110V, 220V or 380V which can be used on the final consumer side and is supplied to the final consumer 4 side.

That is, three-phase power of A, B, and C is supplied from the peripheral pressure transformer 2 to the secondary transformer 3, and the affinity between the peripheral pressure transformer 2 and the secondary transformer 3 depends on the amount of load. In areas with high loads, such as in large cities, they are short (less than a few kilometers), and in areas with few loads, such as in rural or mountainous areas, there are many places where the length of the points is over tens of kilometers.

Therefore, in the present invention, the desired phase information can be detected between the peripheral voltage transformer 2 and the secondary transformer 30 or where there is a power line such as a customer's indoor power line.

2 is a block diagram illustrating a phase information detection system according to the present invention.

As shown in FIG. 2, the phase information detection system according to the present invention detects a power phase (AB C phase), information on the phase and the amount of power, and the like using respective devices installed in the substation 10. It is a system that transmits phase-by-phase data using wired and wireless communication, and can receive this signal by a detection device regardless of the distance of distribution line, so that the detection device can find the absolute phase in the substation at any place. .

In Fig. 2, reference numeral 20 denotes a peripheral pressure transformer installed in a substation (S / S) 10, reference numeral 21 denotes a power distribution line, reference numeral 30 denotes a substation 10, and It is equipped with a function to detect information about the collection of information on the image, and if necessary, the main device capable of transmitting the collected information by wired or wireless communication using a wired network, 31 is an antenna for the line monitoring device (41) Antenna for the main device for wireless communication.

40 is a line monitoring device provided for each distribution line 21 for transmitting power from the peripheral pressure transformer 20 to a plurality of secondary transformers, and 41 is a line monitoring device mounted on each line monitoring device 40. Antenna for the device.

50 is a power supply unit for supplying power to the main device 30 and supplying information about the phase from the transformer power line in the substation 10 to the main device 30.

In Fig. 2, reference numeral 60 denotes a remote control device for controlling the operation of the main device 40 in the substation 10 or receiving data stored in the main device 30 at a remote location, and reference numeral 70 denotes a line. In the monitoring device 40, a measurement place for measuring a phase to be distributed at any point of the positive to the secondary transformer or the consumer side is shown.

Numeral 80 is an image information detecting device for the operator to receive image information from the main device 30 at the measurement place 70, and reference numeral 90 denotes an image between the main device 30 and the image information detecting device 80. As a relay station for transmitting and receiving information, it is a normal wired or wireless communication network.

The image information detecting device 80 according to the present invention is a device that can communicate with the main device 30 both wirelessly and wirelessly at a desired place with a small size and light weight that can be carried by an operator, and is sent from the main device 30. It has a function to receive various information about an image and display desired information to an operator on a screen or sound and to store the state of the received information.

The structure of the phase information detection system according to the present invention is further described below.

The main device 30 has a program for allowing the line monitoring device 40 mounted on the power distribution line and the mobile type information detecting device 80 to exchange information on wire and wireless communication through wired networks. In addition, it stores the function and information that can detect information on the phase from the power line of the transformer 50 in the substation (S / S) in its own memory, and transmits the stored data to a separate remote control device 60 It has a function to save.

In addition, the main device 30 detects information on the phase of the power distribution line of the calling device 80 according to a signal called by the phase information detecting device 80, and transmits an antenna (to the line monitoring device 40). 41, the radio signal is transmitted to analyze the phase information sent from the line monitoring device 40 and transmitted to the device 80 together with the detected information. At this time, the unique authentication code (ID) is searched among the signals sent from the device 80 in advance to determine whether a two-way communication condition is possible and to determine whether to transmit information.

The information communication between the main device 30 and the device 80 consists of two-way communication for exchanging information by wired and wireless communication through a wired network, and the information transmitted to the device 80 includes the current phase information of the corresponding line and the past. Stored data and current time of phase information for a certain time.

Even if there is no information sent from the line monitoring device 40, the information about the phases (A, B, C phase) found by the device 80 can be obtained only by the information on the phase detected by the main device 30, and the absolute You can check the top.

  The power supply of the main device 30 uses the voltage supplied from the transformer 50 in the substation, and is equipped with a rechargeable battery in itself to generate a breakdown or power failure of the transformer in the substation with power that is normally charged. It can keep the operation of main device normally.

The line monitoring device 40 is a device that is operated independently for each distribution line 21, and a signal transformer CT is attached to each phase (A, B, C phase) of the distribution line 21 to be removed from the CT. The circuit voltage and phase information of each phase of the device are detected using the voltage corresponding to the output current. One signal detection CT is attached to each phase (A, B, C phase) of each distribution line 21, and detects information on the phase for each distribution line 21.

The detected phase information is transmitted to the main device 30 using the antenna 41 of the wireless R / F communication (Radio Frequency) device which is built in.

 The R / F function is a communication system that has a different identification code (ID) for each line monitoring device 40 attached to each distribution line 21 so that there is no interference in communication with the main device 30, and outside the case. By attaching a basic indicator light, the operation state of the monitoring device 40 and the transmission / reception status with the main device 30 can be seen from the outside, and the device can be confirmed whether or not there is an abnormality.

The operating power of each line monitoring device 40 is supplied to the circuit operating power of the device by using the output current voltage induced in the current transformer CT attached to each of phases (A, B, and C) of the distribution line 21. use.

Each line monitoring device 40 normally measures the state of the distribution line 21 to obtain phase information of the distribution line 21, and at the same time has a function of storing the measured data for a certain period of time. By the radio signal sent from the (30), the general information on the image of the corresponding line being monitored is transmitted to the master device (30). At this time, communication with the main device 30 transmits and receives mutual information through wireless communication (R / F), and searches for a unique code (ID) among the signals sent from the main device 30 to monitor the corresponding line 40. Only send the overall information about the image to the main device (30).

The phase information detecting device 80 is a main device installed on the substation 10 side of the power distribution line 21 by using the phase information detecting device 80 when a worker needs track repair or information on the phase. It is a device configured to call 30 to obtain various information about the image.

The communication between the phase information detecting device 80 and the main device 30 uses wired and wireless communication, and both communication is possible. When the worker calls the main device 30 using a communication device mounted on the device 80 or the mobile communication device of the worker, the communication between the main device 30 and the device 80 is started. At this time, when the device 80 transmits the information to the main device 30 with a predetermined ID (ID), the main device 30 searches for this information to determine whether communication is possible, and if the device 80 is normal. The current corresponding phase information requested by the user and the data of the corresponding phase information for a predetermined time in the past are sent to the detection device 80, and the current time is transmitted to the phase information detection device 80 side.

In addition, the image information detecting device 80 has an LCD display window that can display information received from the main device 30, and also displays some functions (phase checking signals, etc.) such as phase checking in terms of sound. Correct the time sent from the main device (30).

In addition, since the image information detecting device 80 is required to be mobile, it is made of small size and light weight, and has a built-in program that enables communication with the main device 30 through either wired or wireless communication so as to be free from any place. have.

The remote control device 60 may be connected to the main device 30 to call the main device 30 at any place to which the communication line is connected, and take and store data stored in the main device 30 and the entire substation 10. It is possible to analyze the state of the distribution line 21 (total load and quality of the distribution power, the state of the detection device, information on each phase of each distribution line 21, etc.), and also to remotely analyze the function of the main device 30. It is possible to operate by modifying (Version Up), it is possible to execute an immediate action when a failure or the like of the main device 30 and the line monitoring device 40 occurs.

Next, the specific structure of this invention is demonstrated with reference to FIGS.

3 is a configuration diagram of the main apparatus 30 shown in FIG. 2, FIG. 4 is a configuration diagram of the line monitoring apparatus 40 illustrated in FIG. 2, and FIG. 5 is a phase information detection apparatus illustrated in FIG. 80 is a configuration diagram.

As shown in FIG. 3, the main device 30 receives a wired and wireless communication signal from the device 80 through a terminal of the communication control unit 32, and the received signal is authenticated by the central control unit 33. After identification (ID), the connection is maintained to enable two-way communication through the communication connection control unit 34. On the contrary, after the connection, the authentication code (ID) of the receiving device is checked, and in the case of authentication failure, the connection is automatically cut off through the communication connection control unit 34, thereby preventing unnecessary operation of the device with respect to an incorrectly received signal.

When the connection with the device 80 is maintained, the data sent from the central control unit 33 to the device 80 is first converted into an analog signal required for communication through the D / A converter 34 to the device in the communication control unit 32. Send to 80. The data sent in this way is the data asking the position of the phase (A, B, C phase) that the device 80 is looking for, and the information of the phase (A, B, C phase) sent from the device 80 is returned to the main device 30. Is converted into a digital signal through the A / D converter of the communication control unit 32, and then transferred to the central control unit 33.

The central control unit 33 is connected to the power line of the transformer 50 in the substation in order to send real-time information on the phase required by the device 80, the phase (A, B, C phase) signal received from the phase detection unit 35 And the line monitoring device 40 by wireless communication to receive phase information on each current phase, and transmit necessary information to the phase information detecting device 80, and the corresponding distribution line for a predetermined time in the detecting device 80. When requesting information on the image of the furnace, it is responsible for transmitting the corresponding data stored in the main device to the detection device 80 and terminating.

In this way, the central control unit 33 receives the phase identification information detected by the phase detection unit 35, compares the image identification information with the image sent from the line monitoring device 40, stores the result in the memory unit 37, and controls the remote control. It is connected to the device 60 by wire and sends information on the distribution line to the remote control device by the call of the remote control device, and when there is no call of the remote device, the line monitoring device 40 is called every time to monitor the line. Receives and stores the stored data from the device and transmits the stored data to the remote control device 60 every predetermined time. In addition, the authentication confirmation of the phase information detecting device 80 and the communication connection and blocking commands are issued to the communication connection control unit 34, and periodically checks the state of the line monitoring device 40.

Further, in the line monitoring device 40 according to the present invention, one signal detection CT is attached to each phase (A, B, C phase) of each distribution line to detect signals for each phase of each distribution line. That is, the signal detection part 42 is equipped with the signal detection CT in FIG.

The 0 ° to 180 ° sections of the CT secondary voltage signal sinusoidal waveform (Sine Wave) of the signal detector 42 may be used for the signal, and the 180 ° to 360 ° sections may be used for the power supply.

The voltage detected by the CT of each phase is rectified, connected to one DC power supply, and the voltage is made constant in the power supply section 43. In addition, the voltage component of the remaining phases sends a signal for the phases to the line monitoring controller 45 inside the line monitoring apparatus.

The line monitoring controller 45 analyzes the input A, B, and C phase signals (phase, phase, reverse phase, power failure, magnitude of voltage / current, Sag, Swell, Flicker, third harmonic, etc.) and separates each piece of information. To be stored in the data storage 46. Information on phases A, B, and C is stored in real time, and information (phase loss, power failure, Sag, Swell, Flicker, third harmonic, etc.) except phase identification and voltage / current information is stored for each event. .

At this time, the line monitoring control unit 45 calculates the average value by calculating the magnitude of the current several times (A, B, C) at a predetermined time, and stores one piece of data calculated at a predetermined sample time in real time. Stores the magnitude of the current by phase, and if a certain amount of data is stored, the current data is always overwritten in the form of overwriting the current data on the first stored data so that the data of the phase is stored to the main device 30 by the current time. Send it.

The communication with the main device 30 is bidirectional radio communication (RF) by the R / F communication unit 47, and the size of the device is made small by employing the antenna 41 (Helical Ant.).

Each line monitoring device 40 shown in FIG. 2 is always in a waiting state for reception, and when there is a call signal from the main device 30, the line monitoring is performed by searching for a call code and matching a predetermined code ID. Only the device 40 transmits the information and the stored data about the phase corresponding to the current time to the master device 30.

Next, the structure of the image information detection apparatus 80 concerning this invention is demonstrated with reference to FIG.

In the phase information detecting apparatus 80 shown in FIG. 5, a worker distinguishes A, B, and C phases, that is, phase angles P1, P2, and P3 at a place far from the substation 10, and displays current phase information of each phase. It is a device that can receive the image information of the past for a predetermined time from the main device 30 to check on the display (LCD) provided in the image information detection device 80 and to store the data.

  That is, the operator connects the phase information detecting device 80 to the power line at the work site and transmits the detected phase signal of each phase to the main device on the substation side via wired or wireless communication.

  The image information detecting device 80 may transmit and receive data to and from the main device 30 through wireless communication and wired communication through the relay station 90, and a separate wireless communication device serves as a communication relay in communication with the main device 30. do.

  In FIG. 5, the power supply unit 81 uses the built-in rechargeable battery in the place where there is no constant voltage circuit for supplying the circuit operation power of the phase information detection device 80 and the input AC power. It is configured to be used as a circuit power supply.

When the power supply unit 81 is connected to an external power line, the terminals P1, P2, P3, and N of the detection unit 82 are connected to respective phases of the power line to be found. The detection unit 82 is connected to each phase as described above in three phases, and is connected to the N terminal and the P1 terminal when the phase to be searched is a single phase.

After the connection of the power lines is made, the information request to the main device 30 is created and sent by the keyboard buttons of the data manipulation unit 83 provided outside the phase information detecting device 80, or pre-built in the main control unit 84. The line number is read through the LCD display window of the display unit 85 and sent to the main device 30 using a wired network. Apart from this, when transmitting to the main device 30 through a wireless communication network (mobile communication base station, etc.) using a wireless communication device without using a wired network, the use of the wireless communication device is an image information detection device using an interface cable. The communication connection 86 of 80 and the radio communicator must be in a connected state.

The signal transmitted from the first phase information detection device 80 to the main device 30 is simply information for calling the main device 30. The signal responsive to the main device 30 by this signal is sent to the input signal processing unit 87 via the communication connection unit 86. Since the signal sent from the communication connection unit 86 is an analog signal, the input signal processing unit 87 converts the signal into a digital signal and sends it to the main controller 84. The main controller 84 analyzes the information from the signal sent from the input signal processor 87, generates an authentication code (ID) required by the main device 30, and transmits it to the signal generator 88. The signal generator 88 converts the digital signal sent from the main controller 84 into an analog signal and sends it to the transmission controller 89 to generate a signal necessary for wired and wireless communication. The transmission controller 89 amplifies the signal to a size necessary for communication transmission because the analog signal sent from the signal generator 88 is weak. The signal amplified to the size necessary for communication by the transmission control unit 89 is transmitted to the main device 30 through the communication connection unit 86, and the main device 30 determines whether the communication condition is possible through the signal and the phase information. The information requested by the detection device 80 is sent to the main control unit 84 of the image information detection device 80.

The information sent from the main device 30 is displayed for each item on the display unit 85 of the phase information detecting device 80 so that an operator can check it. It is stored in and can be recalled and used if necessary.

Next, the operation of the phase information detection system shown in FIGS. 2 to 5 will be described with reference to FIG. 6, and will be described in detail with reference to FIGS. 7 and 8.

6 is a view for explaining the concept of the phase state in the phase information detection system according to the present invention.

FIG. 6 (a) shows a waveform of an arbitrary phase (here A is taken as an example) recognized by the main device 30, and FIG. 6 (b) shows a point in time at which the phase angle is 90 degrees on the arbitrary phase (A phase). The pulse Px has been generated. This pulse Px is transmitted from the main device 30 to the phase information detection device 80 via a wired or wireless communication network.

Fig. 6C shows a waveform input to the phase information detection device 80 from the distribution line at any point of the distribution line. That is, it is a waveform of voltages having phases of Px of A phase, Py of B phase, and Pz of C inputted from the distribution line.

As shown in FIG. 6D, the pulse Px of FIG. 6B is delayed by a predetermined time t due to the communication delay time of the communication network, and the pulse Px delay t reaches the information detecting apparatus 80. .

Here, the signal propagation delay time t is calculated by calculating the communication delay time between the main device 30 and the phase information detection device 80 as described later.

The pulse Px delay t in FIG. 6 (d) is 90 ° of the waveform of any one phase in comparison with the arbitrary waveforms (waveforms in A, B, C) in FIG. 6 (c) in view of the communication delay time. The waveform arrives at a point having a phase angle, and the corresponding waveform becomes the waveform shown in FIG. In other words, a waveform having a pulse Px delay t and a 90 ° phase angle becomes an A phase.

However, the communication delay time has an error of ± ㅿ t depending on the status of the communication, but the error is generated within the range (1.6㎳) that can distinguish Px, Py, Pz phases. Does not affect finding B and C phases.

Next, the operation of the phase information detection system shown in Figs. 2 to 5 will be described in detail with reference to Figs.

7 is an operation flowchart of a phase information detection system according to the present invention, and FIG. 8 is a diagram illustrating a phase state in the phase information detection system according to the present invention.

That is, FIG. 7 analyzes the signal of the phase (phase) detected by the phase detection unit 35 of the main device 30 in the central control unit 33 and exchanges the information about the image with the phase information detection device 80. It is a figure which shows the flow at the time of doing.

  The main device 30 communicates with the phase information detecting device 80 by connecting to the wired network through the relay station 90, and the phase information detecting device 80 communicates with the main device 30 by using a wired or wireless communication network. Do it.

The communication between the two devices starts from the phase information detecting device 80 and sends a call signal to the main device 30 from the signal generator 88 built in the mobile communication device or the phase information detecting device 80.

The main device 30 having the wireless communication unit 36 is designed as an automatic answering system and counts the ring tone for a predetermined number (several times) before automatically connecting.

The main device 30 transmits the information "communication connection complete" to the phase information detection device 80 when the communication with the phase information detection device 80 is connected.

The image information detecting device 80 automatically transmits a unique code (ID) embedded in the image information detecting device 80 to the main device 30 when the information “communication connection complete” sent by the main device 30 is received. The host device 30 then retrieves the received code to determine whether or not communication is possible.

In the main device 30, if the code sent by the image information detecting device 80 matches the code embedded in the main device 30, then normal data transmission between the main device 30 and the image information detecting device 80 is performed from this time. It begins.

At the request of the main device 30, the distribution line number to be found by the phase information detecting device 80 is created and sent by an operation button of the data operation unit 83 mounted on the phase information detecting device 80, or pre-programmed. When the distribution line number is retrieved from the LCD display window of the display unit 85 and sent to the main device 30, the main device 30 calls the line monitoring device 40 of the corresponding distribution line sent by the phase information detecting device 80. The information of the distribution line is searched for, and if there is no abnormality, information "measurable" is transmitted to the phase information detecting device 80.

However, if there is no response or abnormality in the line monitoring apparatus 40, the content (reverse phase, phase loss, communication impossibility) is transmitted to the phase information detection apparatus 80.

When the phase information detecting device 80 receives the signal “measurable” sent from the main device 30, the phase information detecting device 80 sends a “Start Time” for measuring the data transmission rate to the main device and at the same time a delay necessary for data communication with the main device. Create a “Time Clock” to measure the time and prepare to send it to the host device.

When the main device 30 receives the “Start Time” information sent from the phase information detecting device 80, the main device 30 may change the “Time Clock” (the other device from another device when communicating between the main device and the receiving device) in the oscillator in the main device 30. In order to measure the delay time of the data transmission signal to the device, it is made of the waveform of the pulse type with the specific frequency and width. It is possible to make the frequency width of a certain period by fixing the frequency at a certain time in the CPU. And a time clock.) Is sent to the phase information detecting device 80 for a predetermined time at the measurement frequency. And then it starts counting the time at the speed of several seconds with sending “Time Clock”.

When the "Time Clock" arrives, the phase information detecting apparatus 80 simultaneously transmits the prepared "Time Clock" (same as the "Time Clock" sent by the main apparatus 30) to the main apparatus 30.

The main device 30 stops time measurement at the same time when the "Time Clock" of the phase information detecting device 80 arrives. The time measured here is a delay time for the "Time Clock" to depart from the main device 30 and to the phase information detecting device 80.

The main device 30 repeats the time measurement it takes for the "Time Clock" to depart from the main device 30 to the phase information detecting device 80 several times, and the "Time Clock" starts to depart from the main device 30. The average delay time value of the time measurement for reciprocating to the information detection device 80 is calculated and stored in the memory unit 37.

If the calculated average time is taken as 1/2, it is the time taken for a signal of the phase information detecting device 80 to reach the main device 30.

Subsequently, the main device 30 is " PTD " (where " PTD " refers to phase angle data of the phase information of the phase information detecting device, and is a data which is generated at a constant frequency by generating an arbitrary pulse at 90 DEG of one period and is also made of a constant period. .) A command to send the information is sent to the phase information detecting device 80, and at the same time, the main device 30 also has an arbitrary phase angle (for example, 90 ° for each phase of 0 ° to 360 °) of the phase angle P1 of phase A. ) Generates one pulse (a pulse of a red line on the A phase having a phase of P1 in FIG. 8).

P1 phase angle of A phase, then P2 phase angle of B phase (pulse of blue line), followed by P3 phase angle (pulse of green line), followed by P1 phase angle,... … The pulses are continuously generated (the pulse width is about several tens of ㎲ or more) in order, and the pulses of each phase are composed of a logic circuit (OR GATE). Then, the period of the output pulse of the gate is about 180 ms.

At the same time, a separate timer is configured so that the timer is reset so that the output of the gate does not counter more than 120 °. This is equivalent to a 180-Hz cycle when each phase pulse is collected in one place. For example, if the counting speed of the timer is 21.6 ms, the number of pulses is 120 between periods. Therefore, only 120 ms is counted repeatedly.

When the phase information detecting device 80 receives a command for requesting the " PTD " information sent from the main device 30, the phase information detecting device 80 continuously performs a pulse several times in a cycle of 0 ° to 360 ° with a period of several tens of milliseconds. Transfer to 30. The frequency of the pulse is transmitted in the pulse of several ㎑ or less and the width of the pulse group is several ㎳ or less. The maximum frequency width should be 5.5ms or less so as not to overlap with the next signal.

The main device 30 keeps the count of the timer regardless of the arrival of the pulse sent from the phase information detecting device 80, and stores only the number of pulses at the moment of arrival, and also the subsequent pulse. Stores the number of pulses of the moment and the value of the moment of arrival one more time.

In this way, several values are added together to obtain an average value. For reference, the value of the instantaneous pulse number cannot exceed 120 times (phase angle 120 °) in principle. In addition, the angular velocity (sin Φ) at 60 Hz is 21,600 ° / Sec, and the angular velocity is also the same in three phases. There is only a phase delay (120 °).

Therefore, if one pulse is generated at any phase angle (for example, 90 °) for each phase of 0 ° to 360 ° in three phases, 180 Hz pulses are generated, so the angular velocity of 60 Hz (21,600 °) is 180 Hz pulses. Dividing by the period is 120 °. Here, the meaning of 120 ° is 1/180 Sec, and the counting timer counts at a speed of 21.6 ㎑ (1 / 46.2 위하여) in order to measure the 120 ° section.

Therefore, the pulse number value at the moment (time) when the pulse sent from the image information detecting device 80 arrives is at least one of 0 to 120 counter pulses. 0 instants (times) are the count start point after reset, 120 are the maximum pulse count values, and the counter start point of the next phase simultaneously with the reset start point.

Fig. 8 shows PTD of phase A (here, "PTD" (Phase Time Data) in the phase information detecting device 80) of each phase detected by the phase information detecting device 80 installed on the measurement site side, and 1 Data is generated at a certain angle within the period, and is divided in a certain period and generated at a predetermined period. ”) Is transmitted to the main device 30, and the time when the PTD arrives on the main device 30 is displayed.

For example, if the image information detecting device 80 transmits the PTD signal and the data transmission time to the main device 30 takes 132 ms, the 132 ms divided by the period of 180 ms pulse (120 ° interval) is 23.76 times. to be. So, basically, subtracting 23 (120 ° intervals) time leaves about 4.222㎳.

As can be seen from FIG. 8, the PTD arrived at the number of pulses at the P1 origin and the number of pulses arrived at the P1 origin after 4.222 ms after the start of the pulse count. The phase progression angle (4.222㎳ X 46.2㎲) is the point at 91.2 ° (PTD of the remaining arrival point after 23 times 120 °). For example, if the data transmission time takes 132 보면, the PTD arrives after about 2851.2 ° in phase angle.

The phase information detecting device 80 generates and counts a pulse at a phase angle of 90 ° for each phase of 0 ° to 360 ° in phase A, and when there are 30, the PTD is transmitted to the main device 30 several times in succession. In addition, a pulse is generated at a phase angle of 90 ° every 0 ° to 360 ° intervals. This is in case the information transmission due to a communication error or the like is not normally performed when the PTD is transmitted to the main device 30. This is to retransmit to the main device (30).

In the phase information detecting device 80, a pulse generated at a phase angle of 90 ° every 0 ° to 360 ° section is generated at the same time as any one of P1, P2, and P3 of the main device 30. Since the voltage of each phase of the phase information detection device 80 is the start point of the connection point affirmation, that is, the voltage phase detected by the main device 30 provided in the substation 10, all phase conditions are the same.

As can be seen from FIG. 8, the image information detecting device 80 selects a detection position on P1. However, the phase information detecting device 80 does not know which A phase on the substation 10 side, but it is clear that one phase is necessarily a P1 phase. Therefore, the main device 30 generates a pulse at a phase angle of 90 ° for each section of 0 ° to 360 ° in the phase advancing direction of each phase and combines them into one gate. Then, in the gate, the pulses are delayed by 120 ° in phase angle due to the characteristics of the three phases. Thus, at the gate, we see a pulse of 180 milliseconds.

Each pulse is a pulse sent by each phase sequentially. However, it is not known whether each pulse is a phase of P1, P2, or P3. Here, the pulse can only know the concept of the upper order, not the concept of the same phase as the A, B, C phase on the substation 10 side.

The A, B, and C phases (phase angles P1, P2, and P3) connected to the phase information detection device 80 are only arbitrary phases. However, in P1, P2, and P3, any phase generates a pulse at the same time as the A phase on the substation 10 side. Therefore, the phase which generate | occur | produced the pulse at the same time as A phase of the substation 10 side among P1, P2, and P3 connected to the phase information detection apparatus 80 is A phase of the substation side.

The phase that generated the pulse at the same time as the A phase on the substation 10 side is a method for finding the A phase on the substation 10 side, and the pulse of the P1 phase detected by the phase information detection device 80 is transmitted to the main device 30. The time until arrival is measured, and the main device 30 calculates the angle of arrival in phase by substituting the PTD sent from the phase information detecting device 80 as shown in FIG. 8, and calculates the angle of arrival at the time of arrival (delay angle). In contrast, the phase that matches the pulse generating position (time of occurrence) among the A, B, and C phases connected to the main device 30 is regarded as the P1 phase on the measurement site side.

The remaining phases are distinguished from the P2 phase and the P3 phase according to the phase delay angles (eg, 120 ° and 240 °). However, since it is impossible to know at what time the phase information detecting device 80 has started counting, the main device 30 sets the position of the voltage phase detection phase by 90 ° for each 0 ° to 360 ° section in the phase progress direction of each phase. Generate pulses at each angle and combine them into one gate. Thus, the pulses and pulses are 120 ° in phase angle.

The pulse sent by the phase information detecting device 80 arrives within an arbitrary angle (120 °), but several devices must be combined to record the arrival time as the phase angle. As a complementary solution to this shortcoming, 120 ° is applied to the above-mentioned method to obtain an angle obtained by calculation.

When the data transmission time is measured, the angular velocity (1 / 21,600 Sec) of the sine wave is calculated, and the angle delayed in phase can be obtained by multiplying the transmission speed by the time taken for data transmission.

Therefore, if the delay time is 132 ms, the PTD of the reference phase of the phase information detecting device 80 is 21,600 * 0.132 = 2,851.2 ° and reaches the main device 30 on the substation 10 side after 2,851.2 ° of angular velocity. That is, a phase with the same angular velocity of the reference phase P1 of the phase information detecting device 80 and the voltage phase detected by the main device 30 on the side of the substation 10 comes out of the phase information detecting device 80. It is a prize. This is because the voltage of each phase of the phase information detection device 80 is the voltage of the distribution line 21 on the substation 10 side, which is the start point of the connection point affirmation, so that all phase conditions are the same.

Therefore, the reference image of the phase information detection device 80 is necessarily the same as any image on the substation 10 side. Therefore, the value obtained by calculating the delay angle in the phase panorama of each phase detected by the main device 30 on the substation 10 side is accurate. That is, the delay angle is first calculated to be 120 °, which is a counting period of the timer, by reversing the angle 2,851.2 ° backward from 2,851.2 ° of the phase panorama of each phase detected by the main apparatus 30 on the substation 10 side. That is, 2,851.2 ° ÷ 120 ° = 23.76. Where 23 is a multiple of 120 ° and 23.76-23 = 0.76. 0.76 is 0.76 * 120 ° = 91.2 °

The mathematical operation is described as follows. That is, since the phase difference of each phase is 120 °, each 120 ° means each phase, and 91.2 ° means 91.2 coefficients of an arbitrary phase, and if the timer counting speed is 21.6㎑, the phase after the progress of 91.2 ° Say a point.

As shown in FIG. 8, when the main device 30 on the substation 10 side moves backward by 91.2 ° in the phase panorama detected, the PTD generation point (angle) of each phase becomes. Also, if you move back 23 times at 120 ° intervals from the point of occurrence (angle), it stops at any phase (point of occurrence). Here, each phase is reversed by 120 °.

In conclusion, the point stopped at an arbitrary phase (originating point) is the same as the reference image of the phase information detecting apparatus 80. Therefore, it can be seen that the reference phase P1 for generating PTD in the phase information detection device 80 is phase A on the substation 10 side. Although there may be errors in the delay time due to communication problems or distances, this problem can be solved by calculating the delay time by calculating the average value of the PTD value several times, and the communication speed is the speed of propagation (30). It is not a problem because the time of phase progress delay is negligibly small in the case of tens and hundreds of kilometers of distance because it is equal to 10,000 km / Sec).

Next, an image information detecting method on the image information detecting device 80 side will be described in detail.

The detection unit 82 of the phase information detecting device 80 detects the voltage of each phase and generates a voltage signal of each phase, and sends the voltage signal to the main control unit 84. This signal is not a concept of the same phase on the substation 10 side, but one phase concept. Is a signal.

Of course, when the voltage of each phase comes in, the main control unit 84 makes the phase order automatically specified for each phase. If two phases are entered as an open phase, it is possible to distinguish which phase is the ground or true phase among at least two phases. In addition, even if only one phase is connected like a single phase, basic information about the phase is analyzed.

Therefore, in the phase information detecting apparatus 80, there is no concept of an image formation, and the analysis is automatically performed depending on how many more phases the voltage signal has in addition to the reference phase. That is, the phase information detection device 80 according to the present invention can analyze phases (slave targets) from the single phase to the three phases based on the voltage of each phase of the substation (100 side).

The phase information detecting device 80 always uses the P1 phase as a reference image among the phases of the connected power line, and transmits PTD, which is phase information of the P1 phase, to the main device 30, and selects any phase of the phases connected to the main device 30. Since the image is transmitted from the main device 30 and informs the image information detecting device 80 of the result, the single phase and the magnetic phase can be distinguished. In the three-phase case, the concept of an early stage is introduced in addition to the above-mentioned analysis.

When the information of the main apparatus 30 is received and the information of which the reception content is "DL ID" is received, the line number input display appears on the LCD display window of the display unit 85 of the phase information detecting apparatus 80. At this time, the line number (DL. NO.) To be measured is transmitted to the main device 30 by inputting the line number with the operation button of the data manipulation unit 83 built in the device, or previously programmed to the main control unit 84. The line number is imported to the LCD display window and selected and transmitted to the main device 30. Then, the image information detecting device 80 goes to the communication standby state, and when the information received from the main device 30 is received again and the information that the received content is "measurable" is received, the central control unit of the image information detecting device 80 Transmits a time signal (a signal for testing a delay time between the phase information detecting device 80 and the main device 30) to the main device 30.

Then, the main control unit 84 prepares the "Time Clock" of the specific frequency and goes to the reception standby state waiting for the information of the main device 30. When the information of the main device 30 is received and the received content is "Time Clock", the "Time Clock" prepared in advance is immediately transmitted to the main device 30.

This operation is repeated several times to give accuracy and reliability of the measurement. Then, the image information detecting device 80 prepares " PTD " in advance and goes to the reception standby state waiting for the signal of the main device 30, receives the information of the main device 30, and the received content requests "PTD" information. If it is a signal to transmit, the prepared "PTD" is transmitted to the main device 30. This operation is repeated several times as above to give accuracy and reliability of the measurement.

After the repetitive execution as described above, when the information of the main device 30 is received again and the information of the reception is "waiting" is retrieved, the central control unit 33 of the main device 30 waits until the operation is completed. .

The calculation of the main device 30 shows that the phase of the voltage reference that the phase information detecting device 80 finds is any phase of the substation.

As described above, the phase information detecting apparatus 80 may identify a phase (phase) to be searched for based on the phase information analyzed by the main apparatus 30. Accordingly, if the reference phase knows which phase based on the above result, In the case of just three phases, but in three phases, the reference phase is regarded as the reference phase, and the remaining phases are automatically analyzed whether the relative phase is true (+ 120 °) or ground (-120 °).

The final information sent from the main device 30 includes the phase (phase) discrimination signal and information on the phase of the corresponding line (phase, phase, phase, reverse phase, magnitude of voltage / current, swell, flicker, sag, presence of power failure, 3 harmonics, etc. Current phase information and stored data for the phase for a certain period of time) and information on each of the remaining three phases is also sent.

Information on the image sent from the main device 30 is recorded by the main control unit 84 in the LCD display window for each item and can be confirmed by the operator, and the necessary items can be selected and stored in the data memory 90 so that they can be recalled when necessary. It is intended to be used with.

After the analysis, the information "completed" is transmitted to the main device 30, and the communication connection with the main device 30 is released.

As mentioned above, although the invention made by this inventor was demonstrated concretely according to the said Example, this invention is not limited to the said Example and can be variously changed in the range which does not deviate from the summary.

That is, in the above embodiment, an embodiment in which phase information is arbitrarily detected in the negative voltage between the peripheral voltage and the secondary transformer has been described. However, the present invention is not limited thereto, and the substation transformer is provided with the system of the main apparatus as described above. Of course, it can also be realized in the low voltage of the car transformer and the end customer.

In addition, although the main device 30 and the line monitoring device 40 have been described as exchanging information with each other through wireless communication, the present invention is not limited thereto.

As described above, according to the phase information detecting apparatus according to the present invention, the effect that one operator can easily and accurately identify the desired phase is obtained in a plurality of transmission and distribution lines, such as underground lines, in which multiple cables are mixed in one tunnel. Lose.

In addition, according to the method and system for detecting phase information according to the present invention, not only the high voltage line but also the low voltage line can check the phase, the phase of the current for each voltage, the presence or absence of power, the magnitude of voltage / current, Sag, Swell . In addition, it is possible to immediately check the necessary information on the construction site such as flicker, third harmonic, and load, so that more accurate load management can be achieved.

Claims (21)

In a phase information detection system for detecting a phase of a distribution line in an arbitrary section between a peripheral voltage in a substation and a plurality of secondary transformers for supplying power to a final customer side or between indoor wiring of a consumer, A main device installed in the substation and collecting information on a phase on a distribution line, A plurality of line monitoring devices installed in each substation and provided for each distribution line for distribution from the peripheral voltage to the plurality of secondary transformers; Phase information detection device for the operator to detect the phase information of the distribution line at any measurement place and A relay station for relaying information between the phase information detecting device and the main device through wired and wireless communication; The phase information detecting apparatus transmits information on the measured phase and information on the authentication number of the phase information detecting apparatus to the main apparatus via the relay station, And the main apparatus notifies the phase information detecting apparatus via the relay station information about the phase of the distribution line of the corresponding substation according to the phase information transmitted from the phase information detecting apparatus. The method of claim 1, And wherein the main apparatus calculates an average delay time for the phase information transmitted from the phase information detecting apparatus to reach the main apparatus. The method of claim 1, The main device transmits a command for requesting “PTD” information to the phase information detection device, and simultaneously generates a pulse at a predetermined phase angle for each phase angle of 0 ° to 360 ° of a specific phase. . The method of claim 3, When the phase information detecting device receives a command for requesting the " PTD " information transmitted from the main apparatus, the main phase is detected by a predetermined number of pulses with a period of 0 to 360 degrees for several cycles. Phase information detection system, characterized in that for transmitting to the device. The method of claim 4, wherein The magnitude of the maximum frequency width of the pulse is less than 5.5kHz phase information detection system. The method of claim 4, wherein When the phase information detection device measures three phases, the phase information detection system is configured to determine the specific phase as a reference phase and determine the remaining phases according to the true phase (+ 120 °) and the ground (-120 °). . In order to detect the phase of the distribution line in any section between the peripheral voltage in the substation and a plurality of secondary transformers for supplying power to the final consumer side or between the indoor wiring of the consumer, it is installed in the substation and installed on the distribution line. In the phase information detection method using a phase information detecting device for collecting the information on the phase and the operator to detect the phase information of the distribution line at any measurement place, (a) the phase information detecting apparatus transmitting information on the phase measured by the distribution line and information on the authentication number of the phase information detecting apparatus to the main apparatus through a wired / wireless communication network, [b] the main device determining whether or not a bidirectional communication condition is possible according to the information transmitted from the phase information detecting device; [c] if the two-way communication condition is satisfied, sending, by the main apparatus, a command for requesting “PTD” information to the phase information detecting apparatus; [d] when the phase information detecting device receives a command requesting “PTD” information from the main device, transmitting a pulse for the measured phase to the main device a predetermined number of times; [e] notifying the phase information detection device of information about the phase of the distribution line of the substation corresponding to the phase measured by the phase information detection device according to the pulse transmission from the phase information detection device. Phase information detection method. The method of claim 7, wherein and [f] after the step [d], calculating, by the main apparatus, an average delay time at which the phase information transmitted from the phase information detecting apparatus reaches the main apparatus. The method of claim 8, The main device transmits a command requesting “PTD” information to the phase information detecting device and generates a pulse at a predetermined phase angle for each phase angle of 0 ° to 360 ° of a specific phase. . The method of claim 9, When the phase information detecting device receives a command for requesting the " PTD " information transmitted from the main apparatus, the main phase is detected by a predetermined number of pulses with a period of 0 to 360 degrees for several cycles from several tens of microseconds. Phase information detection method characterized in that the transmission to the device. The method of claim 10, When the phase information detecting device measures the three phases, the specific phase is determined as the reference phase and the remaining phases are determined according to the true phase (+ 120 °) and the ground (-120 °). . A main device installed in the substation at any interval between the peripheral voltage in the substation and a plurality of secondary transformers for supplying power to the final consumer side or between the indoor wiring of the consumer and the main apparatus for collecting information on the distribution line. In the phase information detection device for detecting the phase of the distribution line at any measurement place, A detector for detecting a voltage of each phase of the distribution line; Communication unit for communicating with the main device by wire or wireless, Means for transmitting PTD (Phase Time Data), which is phase information of a reference phase, from the phase detected from the detector to a reference phase to the main apparatus through the communication unit; Means for transmitting the number of the distribution line to be measured to the master device according to a response from the master device to the PTD information; And means for receiving information from the main apparatus about the image of the distribution line of the substation corresponding to the reference image of the number of the distribution line. The method of claim 12, And input means for inputting a number of the distribution line. The method of claim 12, And display means for displaying information on the phase of the distribution line received from the main apparatus. The method of claim 14, And storage means for storing the information displayed on said display means. The method of claim 12, And a means for transmitting a pulse to said main apparatus by a predetermined number of times with a period of 0 to 360 degrees with respect to said reference phase at several tens of microseconds. The method of claim 16, And the magnitude of the maximum frequency width of the pulse is 5.5 kHz or less. Generate and transmit a pulse at a position having a certain phase angle of one of the phases of the power line, The voltage of each phase is detected at the other end of the power line, and the pulse having the predetermined phase angle is received to determine that the received pulse has a constant delay time corresponding to n (n is a natural number) times one cycle of the waveform. , And determining a waveform corresponding to the predetermined phase angle as the arbitrary phase after the predetermined delay time at the other end of the power line. The method of claim 18, The transmission of the pulse metaphor. Phase information detection method characterized in that the transmission and reception via a relay station or wireless communication of the wireless communication. The method of claim 19, And a predetermined delay time between the transmitted pulse and the received pulse has an error in a range less than the time of phase difference of each phase. The method of claim 20, The error is a phase information detection method, characterized in that less than 5.5kHz.

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