A Fault Simulation System for All-Fiber Optic Current Transformer

Abstract

The present invention discloses a fault simulation system for an all-optical fiber current transformer, and belongs to the technical field of electric power detection. The system of the present invention comprises: an optical path fault simulation circuit, which is connected to the optical path of the all-optical fiber current transformer, and adjusts the parameters of the optical path to simulate the working condition of the optical path fault; and an electric circuit fault simulation circuit, which is connected to the electric path of the all-optical fiber current transformer, generates a voltage signal to drive the electric path of the all-optical fiber current transformer, and simulates the working condition of the electric circuit fault. The system of the present invention is based on the principle and structural characteristics of the all-optical fiber current transformer, and is based on the primary body and electronic unit chassis of the all-optical fiber current transformer. By adding fault simulation equipment to the physical structures such as the optical path and the circuit, the effect of simulating the changes in the optical path and circuit performance parameters of the all-optical fiber current transformer is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of power detection, and more particularly to a fault simulation system for an all-optical fiber current transformer. Background Art

[0002] All-fiber current transformers are key devices that provide measurement, control and protection for high-voltage DC systems. Their stability and reliability directly affect the safe and reliable operation of high-voltage converter stations.

[0003] The all-fiber current transformer is composed of complex optical and electrical circuits. In actual operation, it is difficult to reproduce the optical and electrical faults and find the causes of the faults. In the existing fault handling process, the judgment is mainly based on the previous fault characteristics of the same model product, which leads to problems such as unclear fault mechanism, difficulty in fault location and fault classification.

[0004] The existing all-fiber current transformer detection methods mainly focus on the measurement accuracy, insulation, temperature rise and other aspects. The corresponding relationship between the internal optical circuit, electrical circuit and fault is not studied in depth, and cannot effectively support the fault mechanism analysis and hidden danger investigation of all-fiber current transformers. Summary of the invention

[0005] The purpose of the present invention is to realize the fault simulation of the circuit and optical path of the all-optical current transformer under test conditions, and proposes a fault simulation system of the all-optical current transformer, comprising:

[0006] An optical path fault simulation unit and an optical path fault simulation circuit are connected to the optical circuit of the all-optical current transformer, and the parameters of the optical circuit are adjusted to simulate the working condition of the optical circuit fault;

[0007] The circuit fault simulation unit and the circuit fault simulation loop are connected to the electrical loop of the all-optical current transformer, generate a voltage signal to drive the electrical loop of the all-optical current transformer, and simulate the working condition of the electrical loop fault.

[0008] Optional, optical path fault simulation circuit, including:

[0009] LED light source, outputting light signal;

[0010] An optical coupler splits the optical signal, outputs a light intensity signal to the optical circuit, and monitors characteristic parameters of the optical circuit; the characteristic parameters are used to evaluate the state of the optical circuit;

[0011] Optical power meter, which calculates the light intensity signal output by the optical coupler;

[0012] Optical attenuator, which continuously adjusts the loss of the optical path fault simulation loop, simulates the change of the loss characteristics of the optical loop and the failure of the optical path;

[0013] Photoelectric converter, which converts the light intensity signal returned by the optical loop into an analog signal;

[0014] Capture card, which converts analog signals into digital signals;

[0015] The host computer receives the digital signal and determines the characteristic parameters of the optical circuit according to the digital signal.

[0016] Optionally, the fiber optic coupler is a 90:10 fiber optic coupler.

[0017] Optional, circuit fault simulation loop, including:

[0018] An analog signal generator generates a voltage signal to drive the electrical circuit of the all-optical current transformer;

[0019] Oscilloscope, displays the output of the electrical circuit.

[0020] Optionally, the amplitude and frequency of the voltage signal are adjustable.

[0021] The present invention also proposes a method for simulating a fault of an all-optical current transformer, comprising:

[0022] The optical path fault simulation circuit is connected to the optical path of the all-optical current transformer, and the parameters of the optical path are adjusted through the optical path fault simulation circuit to simulate the working condition of the optical path fault;

[0023] The circuit fault simulation loop is connected to the electrical circuit of the all-optical current transformer, and a voltage signal is generated by the circuit fault simulation loop to drive the electrical circuit of the all-optical current transformer to simulate the working condition of the electrical circuit fault.

[0024] The system of the present invention is based on the principle and structural characteristics of an all-optical current transformer, and is based on the primary body and electronic unit chassis of the all-optical current transformer. By adding fault simulation equipment to physical structures such as optical paths and circuits, the system can simulate the changes in performance parameters of the optical paths and circuits of the all-optical current transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a structural diagram of the system of the present invention;

[0026] Figure 2 Flow chart of the method of the present invention. DETAILED DESCRIPTION

[0027] Now, exemplary embodiments of the present invention are described with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms used in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0028] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0029] The present invention proposes a fault simulation system for an all-optical current transformer, such as Figure 1 As shown, including:

[0030] An optical path fault simulation unit and an optical path fault simulation circuit are connected to the optical circuit of the all-optical current transformer, and the parameters of the optical circuit are adjusted to simulate the working condition of the optical circuit fault;

[0031] The circuit fault simulation unit and the circuit fault simulation loop are connected to the electrical loop of the all-optical current transformer, generate a voltage signal to drive the electrical loop of the all-optical current transformer, and simulate the working condition of the electrical loop fault.

[0032] The optical circuit fault simulation circuit of the all-optical current transformer is connected to the optical circuit input end of the all-optical current transformer, and the fault simulation of the optical circuit of the all-optical current transformer can be carried out by changing the optical circuit parameters.

[0033] The optical path fault simulation circuit includes:

[0034] LED light source, outputting light signal;

[0035] An optical coupler splits the optical signal, outputs a light intensity signal to the optical circuit, and monitors characteristic parameters of the optical circuit; the characteristic parameters are used to evaluate the state of the optical circuit;

[0036] Optical power meter, which calculates the light intensity signal output by the optical coupler;

[0037] Optical attenuator, which continuously adjusts the loss of the optical path fault simulation loop, simulates the change of the loss characteristics of the optical loop and the failure of the optical path;

[0038] Photoelectric converter, which converts the light intensity signal returned by the optical loop into an analog signal;

[0039] Capture card, which converts analog signals into digital signals;

[0040] The host computer receives the digital signal and determines the characteristic parameters of the optical circuit according to the digital signal.

[0041] The optical fiber coupler is a 90:10 optical fiber coupler.

[0042] The circuit fault simulation circuit includes:

[0043] An analog signal generator generates a voltage signal to drive the electrical circuit of the all-optical current transformer;

[0044] Oscilloscope, displays the output of the electrical circuit.

[0045] Among them, the amplitude and frequency of the voltage signal are adjustable.

[0046] The present invention also proposes a method for simulating a fault of an all-optical current transformer, comprising:

[0047] The optical path fault simulation circuit is connected to the optical path of the all-optical current transformer, and the parameters of the optical path are adjusted through the optical path fault simulation circuit to simulate the working condition of the optical path fault;

[0048] The circuit fault simulation loop is connected to the electrical circuit of the all-optical current transformer, and a voltage signal is generated by the circuit fault simulation loop to drive the electrical circuit of the all-optical current transformer to simulate the working condition of the electrical circuit fault.

[0049] The system of the present invention is based on the principle and structural characteristics of an all-optical current transformer, and is based on the primary body and electronic unit chassis of the all-optical current transformer. By adding fault simulation equipment to physical structures such as optical paths and circuits, the system can simulate the changes in performance parameters of the optical paths and circuits of the all-optical current transformer.

[0050] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes. The schemes in the embodiments of the present invention may be implemented in various computer languages, for example, object-oriented programming language Java and literal scripting language JavaScript, etc.

[0051] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0052] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0053] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0054] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0055] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A fault simulation system for an all-optical current transformer, the system comprising: An optical circuit fault simulation circuit is used to connect the optical circuit of the all-optical current transformer and adjust the parameters of the optical circuit to simulate the working condition of the optical circuit fault; A circuit fault simulation circuit is connected to the electrical circuit of the all-optical current transformer, generates a voltage signal to drive the electrical circuit of the all-optical current transformer, and simulates the working condition of the electrical circuit fault; The optical path fault simulation circuit comprises: LED light source, outputting light signal; An optical coupler splits the optical signal, outputs a light intensity signal to the optical circuit, and monitors characteristic parameters of the optical circuit; the characteristic parameters are used to evaluate the state of the optical circuit; Optical power meter, which calculates the light intensity signal output by the optical coupler; Optical attenuator, which continuously adjusts the loss of the optical path fault simulation loop, simulates the change of the loss characteristics of the optical loop and the failure of the optical path; Photoelectric converter, which converts the light intensity signal returned by the optical loop into an analog signal; Capture card, which converts analog signals into digital signals; The host computer receives the digital signal and determines the characteristic parameters of the optical circuit according to the digital signal.

2. The system according to claim 1, wherein the optical coupler is a 90:10 fiber optic coupler.

3. The system according to claim 1, wherein the circuit fault simulation loop comprises: An analog signal generator generates a voltage signal to drive the electrical circuit of the all-optical current transformer; Oscilloscope, displays the output of the electrical circuit. The system according to claim 3 , wherein the amplitude and frequency of the voltage signal are adjustable.

5. A method for simulating a fault of an all-optical current transformer using a system as claimed in any one of claims 1 to 4, the method comprising: The optical path fault simulation circuit is connected to the optical path of the all-optical current transformer, and the parameters of the optical path are adjusted through the optical path fault simulation circuit to simulate the working condition of the optical path fault; The circuit fault simulation loop is connected to the electrical circuit of the all-optical current transformer, and a voltage signal is generated by the circuit fault simulation loop to drive the electrical circuit of the all-optical current transformer to simulate the working condition of the electrical circuit fault.

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