Online monitoring device for voltage transformer

Abstract

The utility model provides an on-line monitoring device for a voltage transformer, and belongs to the technical field of on-line monitoring of electrical equipment. The device comprises a device main body, a plurality of card slots, a data acquisition module, a calculation module and a signal conversion module, the plurality of clamping grooves are sequentially formed in the device main body; the sizes of the clamping grooves are the same, and the clamping grooves are provided with connecting ports of the same size; the data acquisition module, the calculation module and the signal conversion module are respectively fixed in the clamping grooves through connecting ports; the input end of the signal conversion module is connected with the voltage transformer, and the output end is connected with the data acquisition module; a signal acquisition end of the data acquisition module is connected with the output end, and a signal transmitting end is connected with the calculation module; the signal receiving end of the calculation module is connected with the signal transmitting end, and the data transmitting end is in communication connection with remote equipment. According to the utility model, through the data acquisition module, the calculation module and the signal conversion module, the voltage transformer can be calibrated in a non-power-off state.

Description

Technical Field

[0001] The utility model belongs to the technical field of online monitoring of electrical equipment, and in particular relates to an online monitoring device for a voltage transformer. Background Art

[0002] As a crucial measuring device in the power system, the voltage transformer (VT) is the foundation of the Energy Internet. Its primary winding is directly connected to the high-voltage grid, while its secondary winding is connected to protection devices, measuring instruments, and metering equipment. While isolating the primary system from the secondary equipment, it converts the primary-side high-voltage signal into a secondary-side low-voltage signal for safe collection by secondary protection, measurement, control, and metering equipment. The signals collected by the VT are the data source for all metering, protection, and measurement and control equipment in the power system. Therefore, ensuring the normal and stable operation of the VT is conducive to the safe, stable, and economical operation of the power system.

[0003] A prerequisite for timely replacement is accurate assessment of operational errors. Traditionally, this approach relies on periodic offline testing of physical standard transformers during power outages, based on metrological verification procedures. However, this traditional periodic testing is costly, inefficient, and time-sensitive, failing to detect faulty transformers in a timely manner. This severely impacts the real-time accuracy of electricity trade settlements. Furthermore, there is a lack of a flexible online voltage transformer monitoring device. Utility Model Content

[0004] In view of this, the utility model proposes a voltage transformer online monitoring device for non-stop state verification of voltage transformers. The device adopts a modular design concept and realizes flexible configuration of different functional modules through standardized card slots and connection ports.

[0005] In order to achieve the above-mentioned purpose, the technical solution provided by the present utility model is as follows:

[0006] A voltage transformer online monitoring device, comprising:

[0007] Device body, several card slots, data acquisition module, calculation module and signal conversion module;

[0008] Several card slots are sequentially arranged in the device body;

[0009] The card slots are all of the same size and are all provided with connection ports of the same size;

[0010] The data acquisition module, the calculation module and the signal conversion module are fixed in respective card slots through connection ports;

[0011] The input end of the signal conversion module is connected to the voltage transformer, and the output end is connected to the data acquisition module;

[0012] The signal acquisition terminal of the data acquisition module is connected to the output terminal, and the signal sending terminal is connected to the calculation module;

[0013] The signal receiving end of the computing module is connected to the signal sending end, and the data sending end is communicatively connected to the remote device.

[0014] As an option, it further includes: a power supply module;

[0015] The power supply module is arranged in a card slot through a connection port and is connected with other modules of the online monitoring device, and is suitable for providing working power for the online monitoring device.

[0016] As an option, it further includes: a multifunctional grounding submodule;

[0017] The power module is connected to the multifunctional grounding submodule, which includes a plurality of grounding terminals with different functions.

[0018] Preferably, the plurality of grounding terminals include: a signal grounding terminal, a protection grounding terminal and a lightning protection grounding terminal.

[0019] As an option, it also includes: a pressure-resistant enhancement design submodule;

[0020] The voltage-resistant enhanced design submodule includes a voltage-resistant enhanced structural portion, and the power module is encapsulated in the voltage-resistant enhanced structural portion.

[0021] As an advantage, it further includes: a protection module;

[0022] The protection module is arranged in a card slot through a connection port and is connected to other modules of the online monitoring device, and is suitable for protecting other modules of the online monitoring device.

[0023] Preferably, the protection module is provided with: an intelligent overvoltage protection submodule;

[0024] The intelligent overvoltage protection submodule is suitable for overcurrent protection of the online monitoring device.

[0025] Preferably, the protection module is further provided with: an electromagnetic interference filtering submodule;

[0026] The electromagnetic interference filtering submodule adopts active component filters, which are suitable for electromagnetic interference filtering protection.

[0027] Preferably, the protection module is further provided with: a signal isolation submodule;

[0028] The signal isolation submodule adopts optoelectronic isolators and isolation barriers, which are suitable for signal isolation protection.

[0029] As an advantage, it also includes: a reserved expansion module;

[0030] The reserved expansion module is arranged in a card slot through a connection port, and a plurality of reserved expansion interfaces are arranged on the reserved expansion module.

[0031] In summary, the present invention provides an online monitoring device for a voltage transformer, comprising a device body, a plurality of card slots, a data acquisition module, a calculation module, and a signal conversion module; the plurality of card slots are sequentially arranged in the device body; the plurality of card slots are of the same size and are provided with connection ports of the same size; the data acquisition module, the calculation module, and the signal conversion module are respectively fixed in each card slot through a connection port; the input end of the signal conversion module is connected to the voltage transformer, and the output end is connected to the data acquisition module; the signal acquisition end of the data acquisition module is connected to the output end, and the signal sending end is connected to the calculation module; the signal receiving end of the calculation module is connected to the signal sending end, and the data sending end is connected to a remote device for communication. The present invention can perform non-stop power-off status calibration on the voltage transformer through the data acquisition module, the calculation module, and the signal conversion module, and each module can realize blind plug-in operation regardless of the card slot, which greatly improves the flexibility of the device configuration and facilitates maintenance and upgrades. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 A schematic structural diagram of a voltage transformer online monitoring device provided by an embodiment of the present utility model;

[0034] Figure 2 A schematic structural diagram of a multifunctional grounding submodule provided in an embodiment of the present utility model;

[0035] Figure 3 This is a schematic diagram of the protection module structure provided by an embodiment of the utility model.

[0036] In the figure: 1-power module, 2-data acquisition module, 3-computing module, 4-protection module, 5-signal conversion module, 6-reserved expansion module. DETAILED DESCRIPTION

[0037] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0038] See also Figure 1 The present embodiment provides an online monitoring device for a voltage transformer, comprising: a device body, a plurality of card slots, a data acquisition module 2, a calculation module 3, and a signal conversion module 5; the plurality of card slots are sequentially arranged in the device body; the plurality of card slots are of the same size and are provided with connection ports of the same size; the data acquisition module 2, the calculation module 3, and the signal conversion module 5 are respectively fixed in each card slot via the connection ports; the input end of the signal conversion module 5 is connected to the voltage transformer, and the output end is connected to the data acquisition module 2; the signal acquisition end of the data acquisition module 2 is connected to the output end, and the signal sending end is connected to the calculation module 3; the signal receiving end of the calculation module 3 is connected to the signal sending end, and the data sending end is communicatively connected to a remote device.

[0039] The device body is the physical support structure for the entire online monitoring device, housing and organizing other components. Several slots are integrated into the device body and arranged in a specific layout. Each slot is designed with uniform dimensions to facilitate standardized installation of different functional modules. Each slot is also equipped with identical connection ports, ensuring universal and convenient inter-module connectivity. The data acquisition module 2 is responsible for directly or indirectly acquiring real-time data from the voltage transformer, such as collecting and extracting electrical parameters (fundamental frequency, fundamental phase, and fundamental amplitude). The data acquisition module 2 is secured to the slot via a connection port. It receives preliminarily processed signals from the signal conversion module 5 and converts them into digital signals suitable for further processing. The computation module 3 receives the digital signals from the data acquisition module 2 and performs necessary calculations, analysis, and processing, such as fault diagnosis and trend prediction. The computation module 3 not only processes data internally but also has external communication capabilities. It receives the A / D sampled and packaged data output by the data acquisition module 2, processes the data, and transmits the results to a remote monitoring or management system. The signal conversion module 5 is located at the front end of the monitoring chain and is directly connected to the voltage transformer. It converts the high-voltage signal output from the secondary side of the busbar voltage transformer into a proportionally lower voltage signal, which is then output to Data Acquisition Module 2. Each input signal, A, B, and C, is independently protected. This device enables non-stop verification of voltage transformers, significantly reducing power outages and ensuring safe grid operation.

[0040] The working process of the present invention is as follows: the voltage signal monitored by the voltage transformer first passes through the signal conversion module 5, where the preliminary conversion and optimization of the signal form is completed, such as converting the analog signal into a digital signal that is easier to process. The converted signal is sent to the data acquisition module 2. This module further processes these signals, which may include steps such as sampling and quantization, and prepares the processed data for use by the calculation module 3. After receiving the signal from the data acquisition module 2, the calculation module 3 performs necessary calculations and analyses, such as identifying abnormal patterns and evaluating the health status of the equipment. The calculation results are not only used for local alarms or control, but may also be sent to the remote monitoring center through the network interface to achieve remote monitoring and management. The data sending end of the calculation module 3 establishes a communication connection with the remote device, so that maintenance personnel or the automation management system can obtain the monitoring information of the voltage transformer in a timely manner, facilitating rapid response and decision-making.

[0041] like Figure 1 As shown, in one embodiment, it also includes: a power supply module 1; the power supply module 1 is set in a card slot through a connection port and is connected to other modules of the online monitoring device, suitable for providing working power for the online monitoring device.

[0042] like Figure 2 As shown, in a further embodiment, the device further includes a multifunctional grounding submodule; the power module 1 is connected to the multifunctional grounding submodule, and the multifunctional grounding submodule includes several grounding terminals. The multifunctional grounding submodule utilizes an intelligent grounding module to achieve an integrated design for signal grounding, protective grounding, and lightning protection grounding, allowing the device to meet multiple grounding requirements with only a single grounding wire connection.

[0043] In a further embodiment, the plurality of ground terminals include: a signal ground terminal, a protection ground terminal, and a lightning protection ground terminal.

[0044] In further embodiments, the device further comprises a voltage-resistant enhancement submodule, which includes a voltage-resistant enhancement structure, and the power module 1 is encapsulated in the voltage-resistant enhancement structure. Specifically, the voltage-resistant enhancement structure of the voltage-resistant enhancement submodule improves the device's electrical voltage resistance by optimizing electrical clearance and creepage distances, and employing novel insulation materials and packaging technologies.

[0045] like Figure 1 As shown, in one embodiment, the device further includes a protection module 4. The protection module 4 is disposed in a card slot via a connection port and connects to other modules of the online monitoring device, thereby protecting the other modules. Specifically, the protection module 4 integrates signal protection, intelligent overcurrent protection, and other functions into a single compact module, thereby providing overvoltage protection, electromagnetic interference filtering, signal isolation, and overcurrent protection for the device.

[0046] like Figure 3 As shown, in a further embodiment, the protection module 4 includes an intelligent overvoltage protection submodule. The intelligent overvoltage protection submodule is connected to other modules of the online monitoring device and is suitable for providing overcurrent protection for the other modules of the online monitoring device. The intelligent overvoltage protection submodule can implement overcurrent protection using an intelligent electronic device (such as an intelligent circuit breaker), providing real-time monitoring and rapid response.

[0047] like Figure 3 As shown, in a further embodiment, the protection module 4 is further provided with an electromagnetic interference filtering submodule. The electromagnetic interference filtering submodule can use an active component filter to achieve active filtering and select a suitable structural layout to reduce electromagnetic interference. At the same time, during the signal processing process, a software algorithm is used to filter out interference in the digital signal.

[0048] like Figure 3 As shown, in a further embodiment, the protection module 4 is further provided with a signal isolation submodule. The signal isolation submodule can adopt a combination of optoelectronic isolation and isolation barriers, using phototransistors and semiconductor components to prevent direct current flow and achieve isolation. In combination with software algorithms, adaptive adjustment of overcurrent protection and fault diagnosis can be achieved.

[0049] like Figure 1 As shown, in one embodiment, it also includes: a reserved expansion module 6; the reserved expansion module 6 is set in a card slot through a connection port, and a plurality of reserved expansion interfaces are set on the reserved expansion module 6 for reserving relevant interfaces of the function expansion module.

[0050] The above modules are connected through the connectors on the back panel of the device body. Each module uses the same size panel and back connector, and can be universally adapted to card slots 1 to 6, so that each module can be blindly inserted regardless of the card slot, greatly improving the flexibility of the entire machine board configuration and facilitating maintenance and upgrades.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A voltage transformer online monitoring device, characterized in that: include: Device body, several card slots, data acquisition module, calculation module and signal conversion module; A plurality of said card slots are sequentially arranged in said device body; The card slots are all of the same size and are all provided with connection ports of the same size; The data acquisition module, the calculation module and the signal conversion module are respectively fixed in the respective card slots through the connection ports; The input end of the signal conversion module is connected to the voltage transformer, and the output end is connected to the data acquisition module; The signal acquisition end of the data acquisition module is connected to the output end, and the signal sending end is connected to the calculation module; The signal receiving end of the computing module is connected to the signal sending end, and the data sending end is communicatively connected to a remote device.

2. The voltage transformer online monitoring device according to claim 1, characterized in that: Also includes: Power module; The power supply module is arranged in a card slot through the connection port and is connected to other modules of the online monitoring device, and is suitable for providing working power for the online monitoring device.

3. The voltage transformer online monitoring device according to claim 2, characterized in that: Also includes: Multifunctional grounding submodule; The power supply module is connected to the multifunctional grounding submodule, and the multifunctional grounding submodule includes a plurality of grounding terminals with different functions.

4. The voltage transformer online monitoring device according to claim 3, characterized in that: The plurality of grounding terminals include: a signal grounding terminal, a protection grounding terminal and a lightning protection grounding terminal.

5. The voltage transformer online monitoring device according to claim 2, characterized in that: Also includes: Pressure-resistant enhanced design submodule; The voltage-resistant enhanced design submodule includes a voltage-resistant enhanced structural portion, and the power module is encapsulated in the voltage-resistant enhanced structural portion.

6. The voltage transformer online monitoring device according to claim 1, characterized in that: Also includes: Protection module; The protection module is arranged in a card slot through the connection port and is connected to other modules of the online monitoring device, and is suitable for protecting the other modules of the online monitoring device.

7. The voltage transformer online monitoring device according to claim 6, characterized in that: The protection module is provided with: an intelligent overvoltage protection submodule; The intelligent overvoltage protection submodule is suitable for performing overcurrent protection on the online monitoring device.

8. The voltage transformer online monitoring device according to claim 6, characterized in that: The protection module is further provided with: an electromagnetic interference filtering submodule; The electromagnetic interference filtering submodule adopts an active element filter, which is suitable for electromagnetic interference filtering protection.

9. The voltage transformer online monitoring device according to claim 6, characterized in that: The protection module is further provided with: a signal isolation submodule; The signal isolation submodule adopts a photoelectric isolator and an isolation barrier, and is suitable for signal isolation protection.

10. The voltage transformer online monitoring device according to claim 1, characterized in that: Also includes: Reserve expansion module; The reserved expansion module is arranged in a card slot through the connection port, and a plurality of reserved expansion interfaces are arranged on the reserved expansion module.

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