Substation Surge Measurement Device and Method Thereof

Abstract

The surge measuring device (1) of the present invention, which is used for measuring substation surges, includes a monitoring unit (20) that is interconnected by a cable (30) to monitor measurement data of a measuring unit (10) that receives a signal from the secondary side of the substation (100) and then transmit a direct command to the measuring unit (10) according to the status of the measuring device, thereby enabling continuous acquisition of actual measurement data of substation level surges. In particular, by using an oscilloscope / current probe / voltage probe as the measuring unit and building a data simultaneous reception hub / data collection server / user monitoring PC as the monitoring unit, the device has the characteristic of enabling the execution of a measurement preparation confirmation procedure, simultaneous acquisition of individual measuring device signals, and viewing of collected data.

Description

Technology Field

[0001] The present invention relates to substation surge measurement, and more particularly to a substation surge measuring device and method capable of securing continuous actual measurement data of substation level surges. Background Technology

[0002] In general, substations must always supply a constant power through distribution lines because changes in the current supplied to loads can significantly affect household electronic appliances or industrial electrical and electronic equipment.

[0003] To this end, substations widely used electromechanical relays, but currently, the use of digital relays has become commonplace.

[0004] In particular, if a fault occurs due to the malfunction or non-operation of protective relays at a substation, it will have an adverse effect on the stabilization of the entire power system, and there is a concern that the malfunction of protective control equipment and the resulting propagation of faults may occur due to the influence of surges and noise generated during lightning strikes or system failures.

[0005] Furthermore, the increasing use of digital devices, such as digital relays, which have relatively weak resistance to surges and noise, necessitates surge measurement to prevent malfunctions of protective relays caused by lightning strikes and switching surges, as well as to identify and analyze vulnerable equipment in substations.

[0006] For example, substation surge measurement is carried out at the site of the faulty substation using equipment for measurement such as an oscilloscope, current probe, and voltage probe, as shown in Fig. 1.

[0007] However, surge measurement methods using oscilloscopes, current probes, and voltage probes as measuring devices have the following problems.

[0008] First, since measurements are taken after a fault has already occurred, the surge that actually caused the fault may not be reproduced identically because factors such as the substation system conditions, equipment status, and surrounding environment differ from those at the time of the fault.

[0009] Second, due to the high cost of surge measurement equipment and the limited number of movable units, it is difficult to measure various points simultaneously, making it difficult to accurately analyze the cause of failure.

[0010] Third, for safety when operating the switchgear, the measuring equipment must be set up at the site and then moved to the monitoring room to operate the switchgear. Additionally, since the device must be moved back to the site to check the surge measurement waveform and reset for the next measurement, there is a problem of reduced work efficiency due to the excessive time required for measurement. Prior art literature

[0011] Korean Patent Publication KR 10-2002-0007898 (Publication Date: January 29, 2002) The problem to be solved

[0012] Accordingly, the present invention, taking into account the above points, aims to provide a substation surge measuring device and a method thereof that enables the continuous acquisition of actual measurement data of substation level surges, and in particular, by constructing an oscilloscope, current probe, and voltage probe as the measuring unit and a data simultaneous reception hub, data aggregation server, and user monitoring PC as the monitoring unit, thereby enabling the execution of measurement preparation verification procedures, simultaneous acquisition of individual measuring instrument signals, and viewing of aggregated data. means of solving the problem

[0013] The substation surge measuring device of the present invention for achieving the above-mentioned purpose is characterized by comprising: a measuring unit that receives a signal from the secondary side equipment of the substation; a monitoring unit that monitors measurement data of the secondary side equipment of the substation and directly transmits a command to the measuring unit according to the status of the measuring instrument; and a cable that connects the measuring unit and the monitoring unit to collect the measurement data and forms an on-line path so that the monitoring unit transmits the command to the measuring unit.

[0014] In a preferred embodiment, the measuring unit is composed of a measuring sensor, which is a current probe or a voltage probe connected to the secondary side equipment of the substation to detect the signal of the measuring data, and a measuring instrument, which is an oscilloscope that analyzes the detected measuring data of the measuring sensor and transmits it to the monitoring unit.

[0015] In a preferred embodiment, the monitoring unit comprises a hub in which measurement data of the measurement unit is collected, a server connected to the hub for storing the measurement data, and a PC connected to the server for transmitting the direct command to the measurement unit via the cable according to the analysis of the measurement data.

[0016] In a preferred embodiment, the cable is one of a coaxial cable, an optical cable, and a UTP cable.

[0017] In addition, the substation surge measuring device of the present invention for achieving the above-mentioned purpose is characterized by including: first to n measuring sensors that are 1:1 matched to receive signals from the first to n secondary side measuring unit of the substation secondary side equipment; first to n measuring instruments that receive measurement data from the first to n measuring sensors in a 1:1 matched manner; a monitoring unit connected to the first to n measuring instruments that collects data and performs direct command transmission; and first to n cables that connect each of the first to n measuring instruments to the monitoring unit and form a path for command transmission.

[0018] In a preferred embodiment, each of the first to nth measurement sensors is a current probe or a voltage probe, and each of the first to nth measuring instruments is an oscilloscope.

[0019] In a preferred embodiment, the monitoring unit comprises a hub connected to each of the first to n cables that are 1:1 matched with the first to n measuring device to collect the measurement data, a server connected to the hub to store the measurement data, and a PC connected to the server to directly transmit command transmissions using each of the first to n cables as a path for command transmission according to the analysis of the measurement data.

[0020] In a preferred embodiment, each of the first to n cables is a cable among a coaxial cable, an optical cable, and a UTP cable.

[0021] The substation surge measurement method of the present invention for achieving the above-mentioned purpose is characterized by the following steps: connecting a measurement sensor and a measuring instrument connected to a secondary side measurement unit of a substation secondary side facility, and constructing a substation surge measurement device by connecting the hub and the measuring instrument among a hub, a server, and a PC with a cable, and then initializing the substation surge measurement device; when measurement starts, sending a command to initialize the measuring instrument to the measuring instrument via a direct command from the PC through the cable to check the status of the measuring instrument; when the measurement preparation of the measuring instrument is confirmed, maintaining a standby state for measurement; and performing a surge measurement step in which data of the confirmed surge occurrence through signal detection is stored, and the measurement is terminated and the measurement process is restarted.

[0022] In a preferred embodiment, the status check of the measuring instrument is performed after sending the initialization command and after a certain period of time has elapsed.

[0023] In a preferred embodiment, if the measurement preparation of the measuring instrument is not complete, the initialization command is sent once again.

[0024] In a preferred embodiment, when storing the data, the PC performs any one of the following: proceeding with data storage, verifying the signal acquired by the measuring instrument, viewing the collected data, and operating the measuring device.

[0025] In a preferred embodiment, the surge measurement step re-initializes the substation surge measuring device without saving data when noise other than a surge is detected during signal detection. Effects of the invention

[0026] The substation surge measuring device and method of the present invention achieve the following operations and effects regarding measurement work, along with preventing malfunctions through the analysis of surge impact on protective devices and the development of reduction technology by securing continuous actual measurement data of substation-level surges.

[0027] First, the monitoring PC can verify that the measuring instrument is ready for measurement, and if it is not, it can be put into a ready state using an initialization command. Second, data is saved when a surge signal is detected, but the instrument can be initialized without saving data when other signals, such as noise, are detected, thereby maintaining the ready state. Third, signals acquired from individual measuring instruments can be checked simultaneously via the monitoring PC, and collected data and measuring devices can be operated. Brief explanation of the drawing

[0028] FIG. 1 is an example of a method for measuring substation surge using a conventional measuring device, FIG. 2 is a configuration diagram of a substation surge measuring device according to the present invention, and FIG. 3 is a flowchart of a method for measuring substation surge according to the present invention. Specific details for implementing the invention

[0029] Embodiments of the present invention will be described in detail below with reference to the attached illustrative drawings. Since these embodiments are merely examples and can be implemented in various different forms by those skilled in the art to which the present invention pertains, the embodiments described herein are not limited to the examples described herein.

[0030] Referring to FIG. 2, the substation surge measuring device (1) is composed of a measuring unit (10) that receives a signal from the secondary side of the substation equipment (100), a monitoring unit (20) that monitors the measurement data of the measuring unit (10), and a cable (30) that connects the measuring unit (10) and the monitoring unit (20) for data information communication.

[0031] For example, the above measuring unit (10) is composed of a measuring sensor (11) that is connected to / connected to the secondary side equipment (100) of a substation and detects data of the secondary side equipment (100) of the substation, and a measuring instrument (13) that is connected to / connected to the measuring sensor (11) and analyzes the measurement data of the measuring sensor (11). The measuring sensor (11) uses a current probe and a voltage probe, and the measuring instrument (13) uses an oscilloscope.

[0032] In addition, the number of the above-mentioned measuring sensors (11) and the above-mentioned measuring instruments (13) is configured to be the same as the number of the substation secondary side equipment (100), so that they have a layout that is mutually 1:1 matched.

[0033] Specifically, the secondary side equipment (100) of the above substation is composed of a plurality of first to nth secondary side measuring units (100a, 100b, ..., 100n), and accordingly, the measuring sensor (11) is composed of first to nth measuring sensors (11a, 11b, ..., 11n), and the measuring instrument (13) is composed of first to nth measuring instruments (13a, 13b, ..., 13n).

[0034] In particular, each of the first to n measuring instruments (13a, 13b, ..., 13n) is assigned an individual identification number, so that the monitoring unit (20) can check the status of each measuring instrument and issue commands directly to each one.

[0035] Therefore, the above layout is configured to be connected as follows: first secondary side measuring unit (100a) - first measuring sensor (11a) - first measuring instrument (13a), second secondary side measuring unit (100b) - second measuring sensor (11b) - second measuring instrument (13b), ..., nth secondary side measuring unit (100n) - nth measuring sensor (11n) - nth measuring instrument (13n).

[0036] Specifically, the monitoring unit (20) simultaneously receives data from each of the first to n measuring instruments (13a, 13b, ..., 13n) and monitors the data while collecting it, and in particular, it is possible to check the status of each of the first to n measuring instruments (13a, 13b, ..., 13n) having an individual identification number and issue direct commands through the cable (30).

[0037] For example, the monitoring unit (20) is composed of a hub (21), a server (23), and a PC (25). The hub (21) connects each of the first to nth measuring instruments (13a, 13b, ..., 13n) to each of the cables (30). The server (23) collects and stores multiple data information from the hub (21) and then stores the measurement data. The PC (Personal Computer) (25) functions to allow a user to monitor, classify, and judge all the data information collected by the server (23).

[0038] To this end, the server (23) is configured as a data processing device equipped with memory, and the PC (25) is configured as a central processing unit that processes and analyzes multiple data, and in particular, the PC (25) can be a personal computer, a laptop, or a mobile device.

[0039] Specifically, the above cable (30) is composed of first to n cables (30a, 30b, ..., 30n) each connected to the first to n measuring instruments (13a, 13b, ..., 13n) of the measuring instrument (13) and all connected to the hub (21) of the monitoring unit (20), and each of the first to n cables (30a, 30b, ..., 30n) is made of one of a coaxial cable, an optical cable, and a UTP (Unshielded Twisted Pair) cable and is connected to the first to n measuring instruments (13a, 13b, ..., 13n) respectively.

[0040] Meanwhile, FIG. 3 is a method for measuring a substation surge, which is performed in the steps of S10 (measuring device initialization), S20 (measuring device status check), S30 (measuring device readiness check), and S40 to S60 (surge measurement).

[0041] For example, the above measuring device initialization (S10) means initializing the monitoring unit (20) of the hub (21), server (23), and PC (25) together with the first to n secondary measuring units (100a,...,100n), the first to n measuring sensors (11a,...,11n), and the first to n measuring devices (13a,...,13n), and this initialization operation is performed by initializing existing data information after installation.

[0042] Subsequently, the measurement device status check (S20) is performed by sending a measurement device initialization command to each of the first to n measurement devices (13a,...,13n) via a direct command from the PC (23) of the monitoring unit (20) through the first to n cables (30a, 30b,..., 30n) at the start of measurement, and then performing a measurement device status check after a certain period of time has elapsed. In this case, the elapsed period of time is set in seconds.

[0043] And regarding the check of the readiness of the measuring instrument (S30), if it is confirmed that the measurement preparation is complete (Yes) for each of the first to n measuring instruments (13a,...,13n), a waiting state for measurement is maintained, and if it is confirmed that the measurement preparation is not complete (No), the PC (23) sends an initialization command once again to each of the first to n measuring instruments (13a,...,13n) and performs the status check procedure (S10~S30) in the same way.

[0044] The surge measurement (S40~S60) is continued to be performed in the signal detection step of S40, the surge detection confirmation step of S50, and the data storage step of S60.

[0045] For example, when signal detection (S40) confirms that the signal is a surge (S50) (Yes), data storage (S60) is performed, measurement is terminated, and the measurement process is restarted. On the other hand, when signal detection (S40) confirms that the signal is not a surge but another signal such as noise (S50) (No), data storage is not performed, and feedback is provided to maintain the measurement readiness state through meter initialization (S10).

[0046] In particular, the above PC (23) can simultaneously check signals acquired through each of the first to n measuring devices (13a,...,13n) while monitoring and while storing data, and can especially perform viewing of collected data and operation of measuring devices for components.

[0047] As described above, the surge measuring device (1) for a substation surge according to the present embodiment includes a monitoring unit (20) that is interconnected by a cable (30) to monitor measurement data of a measuring unit (10) receiving a signal from the secondary side of the substation (100) and then transmit a direct command to the measuring unit (10) according to the status of the measuring device, thereby enabling continuous acquisition of actual measurement data of the substation level surge. In particular, by using an oscilloscope / current probe / voltage probe as the measuring unit and building a data simultaneous reception hub / data collection server / user monitoring PC as the monitoring unit, the execution of a measurement preparation confirmation procedure / simultaneous acquisition of individual measuring device signals and viewing of collected data can be implemented. Explanation of the symbols

[0048] 1 : Substation surge measuring device 10: Measurement unit 11: Measurement sensor 11a, 11b, ..., 11n: 1st to nth measurement sensors 13 : Measuring instrument 13a, 13b, ..., 13n : 1st to nth measuring instruments 20 : Monitoring Section 21 : Hub 23 : Server 25 : PC 30 : Cable 30a, 30b, ..., 30n: Cables 1 through n 100: Substation secondary equipment 100a, 100b, ..., 100n: 1st to nth secondary side measuring parts

Claims

Claim 1 delete Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 delete Claim 6 delete Claim 7 The system includes: measurement sensors numbered 1 to n (an integer greater than or equal to 2) that are 1:1 matched to receive signals from secondary side measurement units numbered 1 to n (an integer greater than or equal to 2) of the substation secondary side equipment; measuring instruments numbered 1 to n (an integer greater than or equal to 2) that receive measurement data from the measurement sensors numbered 1 to n in a 1:1 matched manner; a monitoring unit connected to the measuring instruments numbered 1 to n that collects measurement data and performs direct command transmission; and cables numbered 1 to n (an integer greater than or equal to 2) that connect each of the measuring instruments numbered 1 to n to the monitoring unit and form a path for the command transmission. The monitoring unit comprises a hub connected to each of the cables numbered 1 to n that are 1:1 matched with the measuring instruments numbered 1 to n to collect the measurement data; a server connected to the hub to store the measurement data; and a PC connected to the server that transmits direct command transmissions using each of the cables numbered 1 to n as a path for the command transmission based on the analysis of the measurement data. The monitoring is performed by the monitoring unit and the 1 to n secondary side A substation surge measuring device characterized by: a measuring unit, the first to nth measuring sensors, and the first to nth measuring instruments after performing an initialization operation, wherein the initialization operation initializes existing data information after installation; each of the first to nth measuring instruments has an individual identification number, and the monitoring unit performs operations through direct commands via the first to nth cables connected to each of the first to nth measuring instruments. Claim 8 ◈Claim 8 was abandoned upon payment of the registration fee.◈ A substation surge measuring device according to Claim 7, characterized in that each of the first to n measuring sensors is a current probe or a voltage probe, and each of the first to n measuring instruments is an oscilloscope. Claim 9 delete Claim 10 ◈Claim 10 was abandoned upon payment of the registration fee.◈ A substation surge measuring device according to Claim 7, characterized in that each of the first to n cables is one of a coaxial cable, an optical cable, and a UTP cable. Claim 11 A substation surge measurement method using a substation surge measurement device according to claim 7, characterized by comprising: a step of connecting a measurement sensor connected to a secondary side measurement section of a substation secondary side facility and a measuring instrument, and constructing a substation surge measurement device by connecting the hub among a hub, a server, and a PC with the measuring instrument via a cable, and then initializing the substation surge measurement device; a step of checking the status of the measuring instrument by sending a measuring instrument initialization command to the measuring instrument via a direct command from the PC through the cable when measurement starts, a step of maintaining a standby state for measurement when the measurement preparation of the measuring instrument is confirmed to be complete, and a surge measurement step in which data of the confirmed surge occurrence through signal detection is stored, and the measurement is terminated and the measurement process is restarted. Claim 12 A substation surge measurement method according to claim 11, characterized in that the status of the measuring instrument is checked after sending the initialization command and after a certain period of time has elapsed. Claim 13 A substation surge measurement method according to claim 11, characterized by sending the initialization command again when the measurement preparation of the measuring instrument is incomplete. Claim 14 A substation surge measurement method according to claim 11, characterized in that, when storing data, the PC performs any one of proceeding with data storage, verifying a signal acquired by a measuring instrument, viewing collected data, and operating a measuring device. Claim 15 A substation surge measurement method according to claim 11, wherein the surge measurement step is characterized by re-initializing the substation surge measurement device without saving data when the signal detection detects noise other than a surge.

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