Three-phase Rogowski coil current transformer with voltage sampling function

Abstract

The invention provides a three-phase Rogowski coil current transformer with voltage sampling, and belongs to the technical field of transformers, and the three-phase Rogowski coil current transformer comprises three three-phase current sampling assemblies which are all used for detecting a detected current to obtain an induced voltage; the three-phase current sampling assemblies are electrically connected with the three-channel integrator assembly, the three-channel integrator assembly is used for calculating the induced voltage and outputting a current signal, and the three-phase current sampling assemblies are connected with the three-channel integrator assembly. The beneficial effects of the invention are that the three three-phase current sampling assemblies respectively detect three detected currents to obtain induced voltages, the three-channel integrator assembly calculates the three induced voltages and outputs the three induced voltages as three corresponding current signals, and the three three-phase voltage sampling assemblies carry out voltage sampling on the detected currents at the same time. The three-phase voltage and the three-phase current can be simultaneously detected by one device.

Description

Technical Field

[0001] The invention belongs to the technical field of mutual inductors, and relates to a three-phase Rogowski coil current mutual inductor with voltage sampling. Background Art

[0002] Rogowski coil is a common current detection device, which can only collect current. Rogowski coil detects the measured current to obtain an induced voltage. The induced voltage signal is proportional to the differential of the measured current. Therefore, an integrator is required to obtain the waveform of the original current. A group of Rogowski coils and integrators are commonly used to detect one current.

[0003] However, in many scenarios, it is necessary to detect three-phase voltage and current. If an ordinary single set of Rogowski coils and integrators is used, only the waveform of the original current of one channel can be detected. Therefore, three sets of Rogowski coils and integrators are required for detection, which leaves much room for improvement. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems in the prior art and to propose a three-phase Rogowski coil current transformer with voltage sampling.

[0005] The purpose of the present invention can be achieved through the following technical solutions: A three-phase Rogowski coil current transformer with voltage sampling, comprising:

[0006] There are three three-phase current sampling components, each of which is used to detect the measured current and obtain an induced voltage;

[0007] A three-channel integrator component, wherein the three three-phase current sampling components are all electrically connected to the three-channel integrator component, and the three-channel integrator component is used to calculate the induced voltage and output it as a current signal, and the three three-phase current sampling components are all connected to the three-channel integrator component.

[0008] In the above-mentioned three-phase Rogowski coil current transformer with voltage sampling, the three three-phase current sampling components are integrated into a first signal line through the three-channel integrator component.

[0009] In the above-mentioned three-phase Rogowski coil current transformer with voltage sampling, it also includes a three-phase voltage sampling component, the number of which is three and each of which is used to perform voltage sampling on the measured current.

[0010] In the above-mentioned three-phase Rogowski coil current transformer with voltage sampling, the three three-phase voltage sampling components are all connected to the three-channel integrator component.

[0011] In the above-mentioned three-phase Rogowski coil current transformer with voltage sampling, the three three-phase voltage sampling components are integrated into a second signal line through the three-channel integrator component.

[0012] In the above-mentioned three-phase Rogowski coil current transformer with voltage sampling, the three-phase current sampling component includes a base, the base is provided with a receiving hole, and the end of the three-phase voltage sampling component away from the three-channel integrator component can be inserted into the receiving hole or pulled out from the receiving hole.

[0013] In the above-mentioned three-phase Rogowski coil current transformer with voltage sampling, the three-phase current sampling component is a Rogowski coil.

[0014] In the above-mentioned three-phase Rogowski coil current transformer with voltage sampling, the three-phase voltage sampling component is a first conductor.

[0015] In the above-mentioned three-phase Rogowski coil current transformer with voltage sampling, it also includes a ground line voltage sampling component, and the ground line voltage sampling component is used to perform voltage sampling on the ground line.

[0016] In the above-mentioned three-phase Rogowski coil current transformer with voltage sampling, the ground line voltage sampling component is the second conductor.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Three three-phase current sampling components are used to detect three measured currents respectively to obtain induced voltages, and the three induced voltages are calculated and output as three corresponding current signals through a three-channel integrator component. There is no need for three sets of Rogowski coils and integrators for detection, and the structure is simple and convenient.

[0019] 2. After the three three-phase current sampling components calculate the three induced voltage outputs into three corresponding current signals through the three-channel integrator component, all of them are transmitted through the first signal line.

[0020] 3. Three three-phase current sampling components and three-channel integrator components detect and calculate three measured currents to obtain induced voltages and output them as three corresponding current signals. At the same time, three three-phase voltage sampling components are used to sample the voltage of the measured currents, thereby realizing that one device can detect three-phase voltage and current at the same time.

[0021] 4. The three three-phase voltage sampling components are all connected to the three-channel integrator component. The three-channel integrator component only serves as a connection and will not interfere with the signal. The three three-phase voltage sampling components are integrated into the second signal line through the three-channel integrator component to prevent the three signal lines from being separated and easily scattered, broken and damaged.

[0022] 5. The end of the three-phase voltage sampling component away from the three-channel integrator component can be inserted into the storage hole or pulled out from the storage hole. Therefore, when the three-phase voltage sampling component is needed, it can be pulled out from the storage hole for work, and when the three-phase voltage sampling component is not needed, it can be inserted into the storage hole for storage to prevent it from falling and breaking.

[0023] 6. The ground voltage sampling component can sample the voltage of the ground wire, has the same structure as the three-phase voltage sampling component, and can be directly or indirectly connected to the three-channel integrator component. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The schematic diagram is a structural diagram of a three-phase Rogowski coil current transformer with voltage sampling according to the present invention.

[0025] Figure 2 This is a structural schematic diagram of the three-phase Rogowski coil current transformer with voltage sampling from another perspective of the present invention.

[0026] Figure 3 for Figure 2 Enlarged view of part A.

[0027] In the figure, 100, Rogowski coil; 110, base; 111, storage hole; 200, three-channel integrator assembly; 300, first wire; 400, second wire. DETAILED DESCRIPTION

[0028] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0029] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, in the present invention, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0034] like Figure 1-Figure 3 As shown, a three-phase Rogowski coil 100 current transformer with voltage sampling includes: a three-phase current sampling component and a three-channel integrator component 200.

[0035] Among them, there are three three-phase current sampling components, which are used to detect the measured current to obtain the induced voltage.

[0036] Among them, the three-channel integrator component 200, the three three-phase current sampling components are all electrically connected to the three-channel integrator component 200, the three-channel integrator component 200 is used to calculate the induced voltage and output it as a current signal, and the three three-phase current sampling components are all connected to the three-channel integrator component 200.

[0037] In this embodiment, three three-phase current sampling components are used to detect three measured currents respectively to obtain induced voltages, and the three induced voltages are calculated by a three-channel integrator component 200 to output three corresponding current signals. There is no need for three sets of Rogowski coils 100 and integrators for detection, and the structure is simple and convenient.

[0038] like Figure 1-Figure 3 As shown, based on the above implementation, the three three-phase current sampling components are integrated into a first signal line through the three-channel integrator component 200.

[0039] In this embodiment, after the three three-phase current sampling components calculate the three induced voltage outputs into three corresponding current signals through the three-channel integrator component 200, all of them are transmitted through the first signal line.

[0040] like Figure 1-Figure 3 As shown, based on the above implementation, it also includes a three-phase voltage sampling component, the number of which is three and all of which are used to perform voltage sampling on the measured current.

[0041] It is worth noting here that in many scenarios, in addition to detecting the three-phase current, it is also necessary to detect the three-phase voltage. Since the Rogowski coil 100 and the integrator cannot detect the voltage, additional components are required to detect the voltage.

[0042] In this embodiment, three three-phase current sampling components and a three-channel integrator component 200 detect and calculate three measured currents to obtain induced voltages and output them as three corresponding current signals. At the same time, three three-phase voltage sampling components perform voltage sampling on the measured currents, thereby realizing that one device can simultaneously detect three-phase voltage and current.

[0043] like Figure 1-Figure 3 As shown, based on the above implementation, the three three-phase voltage sampling components are all connected to the three-channel integrator component 200 .

[0044] In this embodiment, the three three-phase voltage sampling components are all connected to the three-channel integrator component 200, and the three-channel integrator component 200 only plays a connecting role and will not interfere with the signal.

[0045] like Figure 1-Figure 3 As shown, based on the above implementation, the three three-phase voltage sampling components are integrated into a second signal line through the three-channel integrator component 200.

[0046] In this embodiment, the three three-phase voltage sampling components are integrated into a second signal line through the three-channel integrator component 200 to prevent the three signal lines from being separated and easily broken.

[0047] like Figure 1-Figure 3 As shown, based on the above embodiment, the three-phase current sampling component includes a base 110, and the base 110 is provided with a receiving hole 120. The end of the three-phase voltage sampling component away from the three-channel integrator component 200 can be inserted into the receiving hole 120 or pulled out from the receiving hole 120.

[0048] In this embodiment, one end of the three-phase voltage sampling component away from the three-channel integrator component 200 can be inserted into the storage hole 120 or pulled out from the storage hole 120. Therefore, when the three-phase voltage sampling component is needed, it can be pulled out from the storage hole 120 for work, and when the three-phase voltage sampling component is not needed, it can be inserted into the storage hole 120 for storage to prevent it from falling and breaking.

[0049] like Figure 1-Figure 3 As shown, based on the above implementation, the three-phase current sampling component is a Rogowski coil 100.

[0050] In this embodiment, the three-phase current sampling component is a Rogowski coil 100, which can be directly put on the conductor to be measured to measure the alternating current.

[0051] like Figure 1-Figure 3 As shown, based on the above implementation, the three-phase voltage sampling component is a first wire 300.

[0052] In this embodiment, the three-phase voltage sampling component is configured as a first conductor 300, which can be inserted into other components by plugging, or can be connected to other components by line connection.

[0053] like Figure 1-Figure 3 As shown, based on the above implementation, it also includes a ground line voltage sampling component, and the ground line voltage sampling component is used to sample the voltage of the ground line.

[0054] In this embodiment, the ground line voltage sampling component can perform voltage sampling on the ground line, has the same structure as the three-phase voltage sampling component, and can be directly or indirectly connected to the three-channel integrator component 200.

[0055] like Figure 1-Figure 3 As shown, based on the above implementation, the ground line voltage sampling component is a second wire 400.

[0056] In this embodiment, the ground voltage sampling component is configured as a second wire 400, which can be inserted into other components by plugging, or can be connected to other components by line connection.

Claims

1. A three-phase Rogowski coil current transformer with voltage sampling, characterized in that: include: There are three three-phase current sampling components, each of which is used to detect the measured current and obtain an induced voltage; A three-channel integrator component, wherein the three three-phase current sampling components are all electrically connected to the three-channel integrator component, and the three-channel integrator component is used to calculate the induced voltage and output it as a current signal, and the three three-phase current sampling components are all connected to the three-channel integrator component.

2. A three-phase Rogowski coil current transformer with voltage sampling as claimed in claim 1, characterized in that: The three three-phase current sampling components are integrated into a first signal line through the three-channel integrator component.

3. A three-phase Rogowski coil current transformer with voltage sampling as claimed in claim 1, characterized in that: It also includes three-phase voltage sampling components, the number of which is three and each of which is used to perform voltage sampling on the measured current.

4. A three-phase Rogowski coil current transformer with voltage sampling as claimed in claim 3, characterized in that: The three three-phase voltage sampling components are all connected to the three-channel integrator component.

5. A three-phase Rogowski coil current transformer with voltage sampling as claimed in claim 4, characterized in that: The three three-phase voltage sampling components are integrated into a second signal line through the three-channel integrator component.

6. A three-phase Rogowski coil current transformer with voltage sampling as claimed in claim 3, characterized in that: The three-phase current sampling component comprises a base, the base is provided with a receiving hole, and one end of the three-phase voltage sampling component away from the three-channel integrator component can be inserted into the receiving hole or pulled out from the receiving hole.

7. A three-phase Rogowski coil current transformer with voltage sampling as claimed in claim 1, characterized in that: The three-phase current sampling component is a Rogowski coil.

8. A three-phase Rogowski coil current transformer with voltage sampling as claimed in claim 3, characterized in that: The three-phase voltage sampling component is a first conductor.

9. A three-phase Rogowski coil current transformer with voltage sampling as claimed in claim 1, characterized in that: It also includes a ground line voltage sampling component, which is used to sample the voltage of the ground line.

10. A three-phase Rogowski coil current transformer with voltage sampling as claimed in claim 9, characterized in that: The ground line voltage sampling component is a second conducting wire.

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