Rogowski coil, current clamp system and electric energy quality online monitoring system

Abstract

The utility model provides a Rogowski coil, a current clamp system and an electric energy quality on-line monitoring system, which relate to the technical field of electronic circuits and comprise a first BNC connector, an output line, a power adapter, a second BNC connector, a coil joint and a coil. One end of the output line is connected with the first BNC connector, the other end of the output line is connected with the power adapter, the power adapter is connected with the second BNC connector, and the second BNC connector is connected with the coil through the coil connector. According to the utility model, through the measures of optimizing the structural design of the Rogowski coil, adding the extension line assembly, arranging the power adapter gear switch, adopting the filtering magnetic ring and the like, the precision and the stability of current measurement are improved; meanwhile, the system is further provided with auxiliary equipment such as a current clamp and an electric energy quality on-line monitoring device, real-time monitoring of the current of the electric power system and comprehensive evaluation of the electric energy quality can be achieved, and a powerful guarantee is provided for safe and stable operation of the electric power system.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic circuits, in particular to a Rogowski coil, a current clamp system and an online power quality monitoring system. Background Art

[0002] In power systems, accurate current measurement and real-time monitoring are crucial for ensuring safe and efficient operation. While traditional current measurement methods, such as electromagnetic ammeters and shunts, can meet certain measurement requirements, they have significant limitations in terms of high accuracy, wide bandwidth, and lack of magnetic saturation. In particular, under high voltage, high current, and complex electromagnetic environments, traditional current measurement methods often struggle to maintain accuracy and stability.

[0003] With the continuous development and application of power electronics technology, Rogowski coils, as a new type of current sensor, have gained widespread attention and application in power system monitoring due to their high precision, wide bandwidth, and lack of magnetic saturation. Based on Faraday's law of electromagnetic induction, Rogowski coils indirectly measure current by measuring the voltage signal induced in the coil. They offer advantages such as simple structure, easy installation, and high measurement accuracy.

[0004] However, in practical applications, Rogowski coil current monitoring systems still face some challenges. First, the output signal of a Rogowski coil is typically weak and susceptible to external electromagnetic interference, resulting in reduced measurement accuracy. Second, the Rogowski coil's sensitivity may vary for different currents, necessitating the selection of an appropriate measurement range based on actual needs. Furthermore, the Rogowski coil's installation position and method may also affect measurement results, necessitating comprehensive consideration of these factors for optimal design.

[0005] Therefore, a Rogowski coil, a current clamp system and an online power quality monitoring system are proposed. Utility Model Content

[0006] This manual provides a Rogowski coil, current clamp system, and online power quality monitoring system. By optimizing the structural design of the Rogowski coil, adding an extension cord assembly, setting a power adapter position switch, and employing a filter magnetic ring, the system effectively improves the accuracy and stability of current measurement. Furthermore, the system is equipped with auxiliary equipment such as a current clamp and an online power quality monitoring device, enabling real-time monitoring of power system current and comprehensive assessment of power quality, providing strong support for the safe and stable operation of the power system.

[0007] This specification provides a Rogowski coil, including:

[0008] First BNC connector, output cable, power adapter, second BNC connector, coil connector, coil;

[0009] One end of the output line is connected to the first BNC connector, the other end of the output line is connected to the power adapter, the power adapter is connected to the second BNC connector, and the second BNC connector is connected to the coil through the coil connector.

[0010] Optionally, the length of the output line is 2m.

[0011] Optional, also includes: extension cord;

[0012] The coil is connected to one end of the extension line through the coil connector, and the other end of the extension line is connected to the power adapter.

[0013] Optionally, the length of the extension line includes 2m, 5m, 10m, and 30m.

[0014] Optional, including:

[0015] The power adapter is provided with a gear switch, and the current of the power adapter can be adjusted to 500A, 5000A, and OFF by toggling the gear switch.

[0016] This specification provides a current clamp system, including: a filter magnetic ring, an output line, and a current clamp;

[0017] The Rogowski coil is connected to the filter magnetic ring through the first BNC connector, one end of the filter magnetic ring is connected to one end of the output line, and the other end of the output line is connected to the current clamp.

[0018] Optional, including:

[0019] The current clamp is provided with a jaw locking switch. When using the current clamp, first turn the jaw locking switch to the OPEN position, then push the jaws downward to open the current clamp. When threading the core, you must follow the direction indicated by the current guide arrow on the current clamp. After clamping, close the jaws and turn the jaw locking switch to the LOCK position to lock the jaws to prevent them from being accidentally opened.

[0020] This specification provides a power quality online monitoring system, including:

[0021] The Rogowski coil is connected to the filter magnetic ring through the first BNC connector, one end of the filter magnetic ring is connected to one end of the output line, the other end of the output line is connected to the current clamp, and the current clamp is connected to the power quality online monitoring device.

[0022] Optionally, the online power quality monitoring device includes a BS-BP1000L online power quality monitoring device.

[0023] The beneficial effects of the present invention are:

[0024] 1. Using Rogowski coil as current sensor has the advantages of high precision, wide bandwidth, no magnetic saturation, etc., which can realize accurate measurement of current;

[0025] 2. Add extension cord components, and you can flexibly choose extension cords of different lengths according to actual needs to adapt to different installation occasions;

[0026] 3. The power adapter is equipped with a gear switch, which can select the appropriate gear according to the size of the current to be measured to improve the measurement accuracy;

[0027] 4. The filter magnetic ring can effectively filter out high-frequency noise, improve signal quality and ensure the accuracy of measurement results;

[0028] 5. The current clamp is equipped with a jaw locking switch, which is convenient for user operation and can ensure the stability and safety of the current clamp during the measurement process;

[0029] 6. The online power quality monitoring device can monitor the power quality of the power system in real time, providing strong guarantee for the safe and stable operation of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0031] Figure 1 A schematic diagram of the structure of a Rogowski coil provided in an embodiment of this specification;

[0032] Figure 2 A schematic diagram of the structure of a current clamp system provided in an embodiment of this specification;

[0033] Figure 3 This is a structural diagram of an online power quality monitoring system provided in an embodiment of this specification.

[0034] Figure 1: 1. First BNC connector; 2. Output line; 3. Power adapter; 4. Second BNC connector; 5. Coil connector; 6. Coil; 7. Extension line; 8. Filter magnetic ring; 9. Current clamp; 10. Online power quality monitoring device. DETAILED DESCRIPTION

[0035] The following description is intended to disclose the present invention and enable those skilled in the art to implement the present invention. The preferred embodiments described below are provided for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention as defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0036] The following is combined with Figure 1-3 The exemplary embodiments of the present invention are described more fully. However, the exemplary embodiments can be implemented in various forms, and the present invention should not be construed as being limited to the embodiments described herein. On the contrary, providing these exemplary embodiments can make the present invention more comprehensive and complete, and more easily convey the concepts of the utility model to those skilled in the art. In the figures, the same reference numerals represent the same or similar elements, components or parts, and thus their repeated description will be omitted.

[0037] Under the premise of being consistent with the technical concept of the present invention, the features, structures, characteristics or other details described in a specific embodiment do not exclude that they can be combined in one or more other embodiments in a suitable manner.

[0038] In the description of specific embodiments, the features, structures, characteristics, or other details described in the present invention are intended to enable those skilled in the art to fully understand the embodiments. However, this does not preclude those skilled in the art from practicing the technical solutions of the present invention without one or more of the specific features, structures, characteristics, or other details.

[0039] The flowcharts shown in the accompanying drawings are for illustrative purposes only and do not necessarily include all contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may be decomposed, while others may be combined or partially combined. Therefore, the actual order of execution may vary depending on actual circumstances.

[0040] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically separate entities. That is, these functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0041] The term "and / or" or "and / or" includes all combinations of any one or more of the associated listed items.

[0042] Reference Figure 1This manual provides a Rogowski coil, including: a first BNC connector, an output line, a power adapter, a second BNC connector, a coil connector, and a coil. The first BNC connector and the second BNC connector are selected from BNC connectors that comply with industry standards and are used to connect to external devices (such as oscilloscopes, data acquisition cards, etc.). A high-quality cable with a length of 2m is selected as the output line. The output line must have good anti-interference ability and electrical performance. One end of the output line is connected to the first BNC connector and is firmly connected through a special connector or welding to ensure that there is no exposed cable at the connection to prevent short circuit or leakage. The other end of the output line is connected to the power adapter, and the power adapter is connected to the second BNC connector to ensure that the connection is firm and the power cord will not be loosened by external force. The second BNC connector is connected to the coil through the coil connector.

[0043] When in use, simply place the Rogowski coil near the current to be measured, and the sensed current signal can be transmitted to an external device through the first BNC connector for analysis and processing.

[0044] The power adapter is equipped with a gear switch, which allows the user to adjust the output current by toggling the gear switch. By toggling the gear switch, the current of the power adapter can be adjusted to 500A, 5000A, and OFF.

[0045] The Rogowski coil also includes an extension cord. The coil is connected to one end of the extension cord via a coil connector, and the other end of the extension cord is connected to the power adapter. Extension cord lengths include 2m, 5m, 10m, and 30m.

[0046] Reference Figure 2 ,This specification provides a current clamp system, including: a filter magnetic ring, an output line, and a current clamp for filtering out external electromagnetic interference and improving signal quality;

[0047] The Rogowski coil is connected to the filter magnetic ring through the first BNC connector. One end of the filter magnetic ring is connected to one end of the output line, and the other end of the output line is connected to the current clamp, which is responsible for transmitting the filtered signal.

[0048] Optional, including:

[0049] The current clamp is equipped with a jaw locking switch. When using the current clamp, first turn the jaw locking switch to the OPEN position, then push the jaws downward to open the current clamp. When threading the core, follow the direction indicated by the current guide arrow on the current clamp. After clamping, close the jaws and turn the jaw locking switch to the LOCK position to lock the jaws to prevent accidental opening.

[0050] Reference Figure 3 This specification provides an online power quality monitoring system, including:

[0051] The Rogowski coil is connected to the filter magnetic ring through the first BNC connector. One end of the filter magnetic ring is connected to one end of the output line, and the other end of the output line is connected to the current clamp, which is connected to the online power quality monitoring device. As the core component of current sensing, the Rogowski coil is directly placed on the conductor to be measured to measure AC current. The online power quality monitoring device includes the BS-BP1000L online power quality monitoring device, which integrates harmonic analysis, waveform sampling, voltage transient / transient recording flicker monitoring, imbalance analysis, abnormal waveform capture, event recording, power metering, measurement control and other functions. It is used to monitor system abnormal information and determine whether the power quality meets the standards. The BS-BP1000L device samples 1024 points per cycle, has high measurement accuracy, full power measurement, and has ultra-large capacity data storage and recording. Recorded data can be saved for more than half a year, and is displayed on a high-resolution TFT color LCD screen.

[0052] The beneficial effects of the present invention are:

[0053] 1. Using Rogowski coil as current sensor has the advantages of high precision, wide bandwidth, no magnetic saturation, etc., which can realize accurate measurement of current;

[0054] 2. Add extension cord components, and you can flexibly choose extension cords of different lengths according to actual needs to adapt to different installation occasions;

[0055] 3. The power adapter is equipped with a gear switch, which can select the appropriate gear according to the size of the current to be measured to improve the measurement accuracy;

[0056] 4. The filter magnetic ring can effectively filter out high-frequency noise, improve signal quality and ensure the accuracy of measurement results;

[0057] 5. The current clamp is equipped with a jaw locking switch, which is convenient for user operation and can ensure the stability and safety of the current clamp during the measurement process;

[0058] 6. The online power quality monitoring device can monitor the power quality of the power system in real time, providing strong guarantee for the safe and stable operation of the power system.

[0059] The specific embodiments described above further illustrate the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the present invention is not inherently related to any specific computer, virtual device, or electronic device, and various general-purpose devices can also implement the present invention. The above description is merely a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

[0060] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0061] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A Rogowski coil, characterized in that: include: First BNC connector (1), output cable (2), power adapter (3), second BNC connector (4), coil connector (5), coil (6); One end of the output line (2) is connected to the first BNC connector (1), the other end of the output line (2) is connected to the power adapter (3), the power adapter (3) is connected to the second BNC connector, and the second BNC connector (4) is connected to the coil (6) via the coil connector (5).

2. The Rogowski coil according to claim 1, wherein: The length of the output line (2) is 2m.

3. The Rogowski coil according to claim 1, wherein: Also includes: Extension cord (7); The coil (6) is connected to one end of the extension line (7) via the coil connector (5), and the other end of the extension line (7) is connected to the power adapter (3).

4. The Rogowski coil according to claim 3, wherein: The lengths of the extension line (7) include 2m, 5m, 10m, and 30m.

5. The Rogowski coil according to claim 2, wherein: include: The power adapter (3) is provided with a gear switch, and the current of the power adapter (3) can be adjusted to 500A, 5000A, or OFF by toggling the gear switch.

6. A current clamp system comprising the Rogowski coil according to any one of claims 1 to 5, characterized in that: include: Filter magnetic ring (8), output line (2), current clamp (9); The Rogowski coil is connected to the filter magnetic ring (8) via a first BNC connector (1), one end of the filter magnetic ring (8) is connected to one end of the output line (2), and the other end of the output line (2) is connected to the current clamp (9).

7. An online power quality monitoring system, comprising the current clamp system according to claim 6, characterized in that: include: The Rogowski coil is connected to a filter magnetic ring (8) via a first BNC connector (1); one end of the filter magnetic ring (8) is connected to one end of an output line (2); the other end of the output line (2) is connected to a current clamp (9); and the current clamp (9) is connected to an online power quality monitoring device (10).

8. The power quality online monitoring system according to claim 7, characterized in that: The power quality online monitoring device (10) comprises a BS-BP1000L power quality online monitoring device.

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