Merging unit embedded in gas-insulated switchgear, and method thereof

Abstract

The present invention relates to a merging unit embedded in a gas-insulated switchgear and a method thereof, which can simplify a system by embedding a merging unit for a gas-insulated switchgear into the gas-insulated switchgear, prevent intrusion of disturbances into analog signals connected to the merging unit, and reduce redundant digital signal processing costs. The merging unit embedded in a gas-insulated switchgear, of the present invention, comprises: an A-phase secondary converter provided at an output of an A-phase primary converter of a low-power converter embedded in the gas-insulated switchgear; a C-phase secondary converter provided at an output of a C-phase primary converter of the low-power converter; and a B-phase merging unit for performing a merging unit function in a B-phase of the low-power converter.

Description

Gas-insulated switchgear built-in merging unit and method thereof

[0001] The present invention relates to a merging unit embedded in a gas-insulated switchgear and a method thereof, and more specifically, to embedding a merging unit for a gas-insulated switchgear within the gas-insulated switchgear. Furthermore, the present invention relates to a merging unit embedded in a gas-insulated switchgear and a method thereof capable of simplifying analog or digital signals connected to the merging unit.

[0002] Generally, a Gas Insulated Switchgear (GIS) is a switching device that maintains insulation by housing busbars, switching devices, transformers, lightning arresters, etc., inside a metal container and filling and sealing it with SF6 gas, which has excellent insulation performance and arc extinguishing characteristics. In the event of serious abnormalities such as equipment failure, natural phenomena like lightning strikes, transmission line disconnection, leakage, or short circuits in power grids, external substations, or power plants, it separates the power grid from the power plant to prevent damage to the equipment and the spread of ripple effects.

[0003] In these gas-insulated switchgear, high current / voltage signals from the power system were transformed into low signals and transmitted to current / voltage meters and protection / control devices used for measurement and protection / control; for this purpose, power transformers (Current Transformers (CT) and Potential Transformers (PT)) were used.

[0004] Meanwhile, to transmit measurement (transformer) and monitoring / control (monitoring panel) information from field GIS facilities to current and voltage meters and protection control devices, control cables consisting of multiple copper wires are used to connect the outdoor area (GIS) to the substation (meter, protection control device). However, this method has problems such as high cable installation costs and the influx of external noise and surge signals into the substation, which can cause power outages due to malfunctions in the protection control devices.

[0005] Therefore, in order to solve these problems, research has been continuously conducted on converting existing substations into digital substations while applying Merging Units (MU), which are field control and measurement devices.

[0006] For example, Korean Published Patent No. 10-2022-0138643 discloses a merging unit for electronic transformer linkage and a method of operation thereof, which can provide a method for linkage with an electronic transformer and a method for transmitting measurement data communication packets.

[0007] However, in this case, there is a disadvantage in that reliability is reduced because the distance between the secondary converter and the merging unit is long.

[0008] The objective of the present invention is to provide a gas-insulated switchgear merging unit and a method thereof, which can simplify the system by embedding the merging unit for the gas-insulated switchgear within the gas-insulated switchgear.

[0009] Another objective of the present invention is to provide a gas-insulated switchgear-embedded merging unit and a method thereof that can prevent interference intrusion of analog signals connected to the merging unit and also reduce the cost of redundant digital signal processing.

[0010] The gas-insulated switchgear built-in merging unit according to the present invention may include an A-phase secondary converter installed at the output of the A-phase primary converter of a low-power converter built inside a gas-insulated switchgear, a C-phase secondary converter installed at the output of the C-phase primary converter of the low-power converter, and a B-phase merging unit that performs the function of a merging unit in the B-phase of the low-power converter.

[0011] Here, the B-phase merging unit can perform the function of the secondary converter and the merging unit by integrating them into the output of the B-phase primary converter of the low-power converter.

[0012] In addition, the B-phase merging unit may be characterized by supplying a time synchronization signal to the A-phase secondary converter and the C-phase secondary converter, and receiving a measured value from the gas-insulated switchgear.

[0013] Here, the B-phase merging unit can transmit measurement values ​​on the process bus according to priority in accordance with IEC61850-9-2 or IEC61850-9 standards.

[0014] In addition, the B-phase merging unit can configure a multi-buffered memory to receive and align measurement values ​​at the time synchronization signal points of the A-phase, B-phase, and C-phase.

[0015] Meanwhile, the integrated merging unit, which integrates the A-phase secondary converter, the B-phase merging unit, and the C-phase secondary converter, can be extended and connected to the B-phase of the gas-insulated switchgear.

[0016] A gas-insulated switchgear internal merging method according to another embodiment of the present invention may include an A-phase secondary conversion step for detecting a measured value of A in an A-phase secondary converter installed at the output of an A-phase primary converter of a low-power converter embedded inside a gas-insulated switchgear, a C-phase secondary conversion step for detecting a measured value of C in a C-phase secondary converter installed at the output of a C-phase primary converter of the low-power converter, and a B-phase secondary conversion and merging step for performing a merging unit function in a B-phase merging unit installed on the B-phase of the low-power converter.

[0017] Here, in the B-phase secondary conversion and merging stage, the B-phase merging unit can perform the function of the secondary converter and the merging unit by integrating them into the output of the B-phase primary converter of the low-power converter.

[0018] In addition, during the B-phase secondary conversion and merging stage, the B-phase merging unit may be characterized by supplying a time synchronization signal to the A-phase secondary converter and the C-phase secondary converter and receiving the measured value from the gas-insulated switchgear.

[0019] Here, in the B-phase secondary conversion and merging stage, the B-phase merging unit can transmit measurement values ​​on the process bus according to priority in accordance with IEC61850-9-2 or IEC61850-9 standards.

[0020] In addition, during the B-phase secondary conversion and merging stage, the B-phase merging unit can configure a multi-buffered memory to receive and align measurement values ​​at the time synchronization signal points of the A-phase, B-phase, and C-phase.

[0021] The gas-insulated switchgear merging unit and method according to the present invention have the advantage of simplifying the system by embedding the merging unit for the gas-insulated switchgear within the gas-insulated switchgear.

[0022] In addition, the gas-insulated switchgear built-in merging unit and the method according to the present invention have the advantage of preventing interference intrusion of analog signals connected to the merging unit and also reducing the cost of redundant digital signal processing.

[0023] FIG. 1 is a schematic diagram showing a gas-insulated switchgear merging unit according to one embodiment of the present invention.

[0024] Figure 2 is a drawing showing a gas-insulated switch including the integrated merging unit of Figure 1.

[0025] FIG. 3 is a flowchart illustrating a gas-insulated switchgear merging method according to one embodiment of the present invention.

[0026] Hereinafter, specific embodiments for carrying out the present invention will be described with reference to the attached drawings.

[0027] In describing the present invention, terms such as first, second, etc. may be used to describe various components, but the components may not be limited by the terms. The terms are intended solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component.

[0028] When it is described that a component is connected to or coupled with another component, it may be directly connected to or coupled with that other component, but it can also be understood that there may be other components in between.

[0029] The terms used in this specification are used merely to describe specific embodiments and are not intended to limit the invention. Singular expressions may include plural expressions unless the context clearly indicates otherwise.

[0030] In this specification, terms such as "comprising" or "having" are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not excluding in advance the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0031] In addition, the shapes and sizes of elements in the drawings may be exaggerated for clearer explanation.

[0032] Hereinafter, a gas-insulated switchgear built-in merging unit and a method according to the present invention will be described in detail with reference to the attached drawings.

[0033]

[0034] FIG. 1 is a schematic diagram showing a gas-insulated switchgear merging unit according to one embodiment of the present invention, and FIG. 2 is a detailed drawing for explaining FIG. 1 in detail.

[0035] Hereinafter, a gas-insulated switchgear merging unit according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

[0036] First, referring to FIG. 1, the gas-insulated switchgear built-in merging unit according to the present invention comprises an A-phase secondary converter (110) installed at the A-phase primary converter output of a low-power converter built inside a gas-insulated switchgear (GIS), a C-phase secondary converter (130) installed at the C-phase primary converter output of the low-power converter, and a B-phase merging unit (120) that integrates the functions of the secondary converter and the merging unit functions at the B-phase primary converter output of the low-power converter.

[0037] Here, the B-phase merging unit (120) supplies a time synchronization signal to the A-phase secondary converter (110) and the C-phase secondary converter (130), and receives a measurement value measured by the gas-insulated switchgear and can transmit the measurement value onto the process bus according to the IEC61850-9-2 or IEC61850-9 standard.

[0038] At this time, since phases A, B, and C have different measurement cycles, the phase B merging unit (120) can configure a multi-buffer type memory to receive and sort measurement values ​​at the time synchronization signal point of phases A, B, and C. Afterwards, when the measurement values ​​of the three phases are collected, the measurement values ​​can be transmitted on the process bus according to priority.

[0039] Conventionally, a method was used in which the input of the voltage / current sensor of the low-power converter was brought in as an analog signal using copper wires from the gas-insulated switchgear to the local panel, or data converted into a digital signal from a secondary converter installed at the top of the gas-insulated switchgear was received via communication and reconstructed into a sampled value in accordance with the IEC 61850-9-2 standard and transmitted to the communication network.

[0040] However, the gas-insulated switchgear built-in merging unit of the present invention can prevent duplication of digital devices and simplify the system by incorporating the function of a merging unit into an existing secondary converter, and can also prevent interference by not running the analog copper wire, which is the output of the low-power converter, to the local panel, and can achieve cost reduction effects through the simplification of digital device usage.

[0041] The integrated merging unit (100) of the present invention, which integrates the A-phase secondary converter (110), B-phase merging unit (120), and C-phase secondary converter (130), is easier to install than conventional methods, and this is explained as an example in FIG. 2.

[0042] FIG. 2 is a drawing showing a gas-insulated switch including the integrated merging unit (100) of FIG. 1.

[0043] As can be seen in FIG. 2, in the present invention, an integrated merging unit (100) that integrates an A-phase secondary converter (110), a B-phase merging unit (120), and a C-phase secondary converter (130) is extended and connected to the B-phase of a gas-insulated switchgear. At this time, the three-phase secondary converters and merging units are integrated inside the integrated merging unit (100), so they can be simply mounted as a single module.

[0044]

[0045] Next, FIG. 3 is a flowchart illustrating a gas-insulated switchgear merging method according to one embodiment of the present invention.

[0046] As can be seen in FIG. 3, the gas-insulated switchgear internal merging method comprises an A-phase secondary conversion step (S100) for detecting a measured value of A-phase at an A-phase secondary converter (110) installed at the output of an A-phase primary converter of a low-power converter embedded inside a gas-insulated switchgear (GIS), a C-phase secondary conversion step (S200) for detecting a measured value of C-phase at a C-phase secondary converter (130) installed at the output of a C-phase primary converter of the low-power converter, and a B-phase secondary conversion and merging step (S300) for performing a merging unit function at a B-phase merging unit (120) installed on the B-phase of the low-power converter.

[0047] At this time, in the B-phase secondary conversion and merging step (S300), the B-phase merging unit (120) supplies a time synchronization signal to the A-phase secondary converter (110) and the C-phase secondary converter (130), and at the same time receives the measured value from the gas-insulated switchgear and can transmit the measured value onto the process bus according to the IEC61850-9-2 or IEC61850-9 standard.

[0048] Meanwhile, since phases A, B, and C have different measurement cycles, the phase B merging unit (120) can configure a multi-buffer type memory to receive and sort measurement values ​​at the time synchronization signal point of phases A, B, and C. Afterward, when the measurement values ​​of the three phases are collected, the measurement values ​​can be transmitted on the process bus according to priority.

[0049] Conventionally, a method was used in which the input of the voltage / current sensor of the low-power converter was brought in as an analog signal using copper wires from the gas-insulated switchgear to the local panel, or data converted into a digital signal from a secondary converter installed at the top of the gas-insulated switchgear was received via communication and reconstructed into a sampled value in accordance with the IEC 61850-9-2 standard and transmitted to the communication network.

[0050] However, the gas-insulated switchgear merging method according to the present invention can prevent duplication of digital devices and simplify the system by incorporating the function of a merging unit into an existing secondary converter, and can also prevent interference intrusion by not running the analog copper wire, which is the output of the low-power converter, to the local panel, and can achieve cost reduction effects through the simplification of digital device usage.

[0051]

[0052] As described above, the gas-insulated switchgear merging unit and method according to the present invention can simplify the system by embedding the merging unit for the gas-insulated switchgear within the gas-insulated switchgear, and also has the advantage of preventing interference intrusion of analog signals connected to the merging unit and reducing redundant digital signal processing costs.

[0053]

[0054] Those skilled in the art will understand that the various exemplary logic blocks, modules, processors, means, circuits, and algorithm steps described in connection with the embodiments disclosed herein may be implemented by electronic hardware, various forms of programs or design code (referred to herein as software for convenience), or a combination of all such. To clearly illustrate this interoperability between hardware and software, various exemplary components, blocks, modules, circuits, and steps have been generally described above in relation to their functions. Whether such functions are implemented as hardware or software depends on the design constraints imposed on the specific application and the overall system. Those skilled in the art may implement the functions described in various ways for each specific application, but such implementation decisions should not be interpreted as being outside the scope of the invention.

[0055] The various embodiments presented herein may be implemented as methods, devices, or articles manufactured using standard programming and / or engineering techniques. The term "article manufactured" includes a computer program, a carrier, or a medium accessible from any computer-readable storage device. For example, computer-readable storage media include, but are not limited to, magnetic storage devices (e.g., hard disks, floppy disks, magnetic strips, etc.), optical discs (e.g., CDs, DVDs, etc.), smart cards, and flash memory devices (e.g., EEPROMs, cards, sticks, key drives, etc.). Additionally, the various storage media presented herein include one or more devices and / or other machine-readable media for storing information.

[0056] It should be understood that the specific order or hierarchy of steps in the presented processes is merely an example of exemplary approaches. It should be understood that, based on design priorities, the specific order or hierarchy of steps in the processes may be rearranged within the scope of the invention. The appended method claims provide various step elements in a sample order, but do not imply limitation to the specific order or hierarchy presented.

[0057] The description of the presented embodiments is provided so that any person skilled in the art may use or practice the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments without departing from the scope of the present invention. Thus, the present invention is not limited to the embodiments presented herein, but should be interpreted in the broadest possible scope consistent with the principles and novel features presented herein.

[0058] The present invention relates to a gas-insulated switchgear internal merging unit and a method thereof, and is applicable in the field of gas-insulated switchgear.

Claims

1. An A-phase secondary converter installed at the output of the A-phase primary converter of a low-power converter embedded inside a gas-insulated switchgear; A C-phase secondary converter installed at the output of the C-phase primary converter of the above low-power converter; and A gas-insulated switchgear built-in merging unit comprising a B-phase merging unit that performs the function of a merging unit in the B-phase of the above-mentioned low-power converter.

2. In Paragraph 1, A gas-insulated switchgear built-in merging unit characterized by the above-mentioned B-phase merging unit integrating the functions of a secondary converter and a merging unit into the output of the B-phase primary converter of the above-mentioned low-power converter.

3. In Paragraph 1, A gas-insulated switchgear built-in merging unit characterized by the above-mentioned B-phase merging unit supplying a time synchronization signal to the above-mentioned A-phase secondary converter and the above-mentioned C-phase secondary converter and receiving a measured value measured by the above-mentioned gas-insulated switchgear.

4. In Paragraph 3, The above-mentioned B-phase merging unit is a gas-insulated switchgear built-in merging unit characterized by transmitting the above-mentioned measurement values ​​on a process bus according to priority in accordance with IEC61850-9-2 or IEC61850-9 standards.

5. In Paragraph 4, A gas-insulated switchgear built-in merging unit characterized by the above-mentioned B-phase merging unit configuring a multi-buffer type memory to receive and align measurement values ​​at the time synchronization signal points of A-phase, B-phase, and C-phase.

6. In Paragraph 1, A gas-insulated switchgear built-in merging unit characterized by the integrated merging unit, which combines the A-phase secondary converter, the B-phase merging unit, and the C-phase secondary converter, being extended and connected to the B-phase of the gas-insulated switchgear.

7. An A-phase secondary converter step for detecting the A-phase measured value at an A-phase secondary converter installed at the output of an A-phase primary converter of a low-power converter embedded inside a gas-insulated switchgear; A C-phase secondary converter step for detecting a C-phase measured value in a C-phase secondary converter installed at the output of the C-phase primary converter of the above low-power converter; and A gas-insulated switchgear built-in merging method comprising: a B-phase secondary conversion and merging step that performs a merging unit function in a B-phase merging unit installed on the B-phase of the low-power converter.

8. In Paragraph 7, A gas-insulated switchgear merging method characterized in that, in the above-mentioned B-phase secondary conversion and merging step, the B-phase merging unit integrates the functions of the secondary converter and the merging unit into the output of the B-phase primary converter of the low-power converter.

9. In Paragraph 7, A gas-insulated switchgear merging method characterized in that, in the above-mentioned B-phase secondary conversion and merging step, the B-phase merging unit supplies a time synchronization signal to the A-phase secondary converter and the C-phase secondary converter and receives a measured value measured by the gas-insulated switchgear.

10. In Paragraph 9, A gas-insulated switchgear merging method characterized in that, in the above-mentioned B-phase secondary conversion and merging step, the B-phase merging unit transmits the measurement values ​​on a process bus according to priority in accordance with IEC61850-9-2 or IEC61850-9 standards.

11. In Paragraph 10, A gas-insulated switchgear merging method characterized in that, in the above-mentioned B-phase secondary conversion and merging step, the B-phase merging unit configures a multi-buffer type memory to receive and align measurement values ​​at the time synchronization signal points of the A-phase, B-phase, and C-phase.

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