Device for transmitting ultraviolet partial discharge signal through liquid core optical fiber

Abstract

The utility model provides a liquid core optical fiber ultraviolet partial discharge signal conduction device which is used for conducting conduction monitoring on ultraviolet light generated by partial discharge of high-voltage electrical equipment and comprises a first liquid core optical fiber and an ultraviolet sensing probe, and a light window at one end of the first liquid core optical fiber faces a partial discharge position. A light outlet at the other end of the first liquid core optical fiber is aligned with the ultraviolet sensing probe; the performance of the liquid core optical fiber is fully utilized, and accurate, low-cost and barrier-free conduction and monitoring of ultraviolet light can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of safety monitoring of dangerous signals in power electrical equipment, and in particular to the field of a device for transmitting ultraviolet partial discharge signals using liquid-core optical fiber. Background Technology

[0002] Partial discharge (PD) in high-voltage electrical equipment can be monitored using ultraviolet light generated by PD. Typically, an ultraviolet sensor probe can be installed near the PD-prone area to collect ultraviolet light signals. The intensity and wavelength of the ultraviolet light signals are used to analyze the degree of PD and issue early warning signals to remind relevant personnel to make judgments and take appropriate actions.

[0003] Since light travels in a straight line, the ultraviolet light signal generated when partial discharge occurs inside electrical equipment or on the back of insulating components cannot directly propagate to the ultraviolet sensor probe, thus causing missed detections or reduced accuracy of the signal transmission monitoring system. At the same time, when partial discharge occurs inside the insulation structure of electrical equipment, such as inside the windings of high-voltage motors or SF6 switchgear, the generated ultraviolet light signal is completely shielded and cannot propagate to the ultraviolet sensor probe, which will also have the above-mentioned adverse effects.

[0004] Therefore, it is necessary to use a device to transmit the ultraviolet light signal generated by partial discharge around obstacles to the ultraviolet sensing probe, so as to overcome the application limitations of the ultraviolet partial discharge monitoring system. Utility Model Content

[0005] The purpose of this invention is to solve the problem of how to transmit ultraviolet light signals generated by invisible partial discharges around obstacles to the ultraviolet sensing probe, so as to overcome the problem of missed reports or reduced accuracy when the ultraviolet partial discharge monitoring system collects ultraviolet light signals.

[0006] To achieve the above objectives, the technical solution provided by this utility model is: a device for transmitting ultraviolet partial discharge signals using liquid-core optical fiber, which conducts and monitors the ultraviolet light generated by partial discharge of high-voltage electrical equipment, characterized in that: it includes a first liquid-core optical fiber and an ultraviolet sensing probe, with the optical window at one end of the first liquid-core optical fiber facing the partial discharge position, and the light outlet at the other end of the first liquid-core optical fiber aligned with the ultraviolet sensing probe.

[0007] It also includes a ring-scanning ultraviolet partial discharge signal coupling device and a second liquid-core fiber, with the first liquid-core fiber aligned with the ultraviolet sensing probe in sequence through the ring-scanning ultraviolet partial discharge signal coupling device and the second liquid-core fiber.

[0008] The ring-scanning ultraviolet partial discharge signal coupling device includes a fixed disk, a rotating disk, and a motor. The fixed disk is fixedly set, and the light outlet of the first liquid-core fiber is arranged on the fixed disk. The rotating disk is driven to rotate by a stepper motor. The optical window of the second liquid-core fiber is fixed on the rotating disk. The optical window on the rotating disk is aligned with or periodically reciprocates with the light outlet of the first liquid-core fiber on the fixed disk. The light outlet of the second liquid-core fiber is aligned with the ultraviolet sensing probe.

[0009] One or more first liquid-core optical fibers are provided, and the light outlets of the multiple first liquid-core optical fibers are arranged in a ring on a fixed disk.

[0010] This invention uses liquid-core optical fiber to accurately and reliably transmit the partial discharge ultraviolet light signal from the blocked or shielded area to the ultraviolet partial discharge probe through pre-embedded methods. Through a ring-scanning ultraviolet partial discharge signal coupling device, it can monitor and locate partial discharge in multiple target areas.

[0011] The beneficial effects of this utility model are: 1. It uses liquid-core optical fiber to transmit ultraviolet partial discharge signals, which solves the problem that the ultraviolet partial discharge monitoring system of high-voltage electrical equipment suffers from missed reporting or decreased accuracy in ultraviolet light signal acquisition and transmission due to ultraviolet light being blocked or shielded.

[0012] 2. The liquid-core optical fiber used has advantages such as a large core diameter, high and wide spectral transmission efficiency, large numerical aperture, large bending amplitude, and can be made into insulation, making it very suitable for high-voltage applications.

[0013] 3. The ring-scanning ultraviolet partial discharge signal coupling device is adopted to realize partial discharge monitoring and conduction positioning of multiple target areas, which significantly improves the utilization rate of ultraviolet sensor probes and the monitoring efficiency of the system. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0015] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0016] Wherein: 1-high voltage bushing, 2-optical window of the first liquid-core fiber, 3-first liquid-core fiber, 4-ultraviolet sensor probe, 5-partial discharge monitoring target area, 6-stator winding of high voltage motor, 7-light outlet of the first liquid-core fiber, 8-ring scanning ultraviolet partial discharge signal coupling device, 9-fixed disk, 10-rotating disk, 11-second liquid-core fiber, 12-optical window of the second liquid-core fiber, 13-light outlet of the second liquid-core fiber. Detailed Implementation

[0017] The preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0018] Example 1, as Figure 1 As shown, in this embodiment, a first liquid-core optical fiber 3 is used to transmit the ultraviolet light signal of a partial discharge monitoring target area 5 to the partial discharge point of the high-voltage bushing 1 and monitor it by the ultraviolet sensor probe 4. The optical window 2 of the first liquid-core optical fiber is aligned with the partial discharge monitoring target area 5, and the light outlet 7 of the first liquid-core optical fiber is aligned with the ultraviolet sensor probe 4.

[0019] The beneficial effect of this embodiment is that it makes full use of the performance of liquid-core optical fiber to achieve accurate and unobstructed transmission and monitoring of ultraviolet light.

[0020] Example 2, as Figure 2 As shown, in this embodiment, three first liquid-core optical fibers 3 are used to conduct ultraviolet light signals from three partial discharge monitoring target areas 5 corresponding to the three partial discharge points of the stator winding 6 of the high-voltage motor. Accurate, rapid, and multi-point efficient transmission monitoring is achieved through a ring-scanning ultraviolet partial discharge signal coupling device 8 and second liquid-core optical fibers 11. The optical windows 2 of the three first liquid-core optical fibers are respectively aligned with the three partial discharge monitoring target areas 5. The light outlets 7 of the first liquid-core optical fibers are respectively arranged in a ring on a fixed disk 9. The optical windows 12 of the second liquid-core optical fibers are fixed on a rotating disk 10. The fixed disk 9 and the rotating disk 10 are coaxially arranged. The rotating disk 10 is driven to rotate by a stepper motor. The optical windows 12 of the second liquid-core optical fibers on the rotating disk 10 periodically align with the light outlets 7 of the first liquid-core optical fibers on the fixed disk 9. The light outlets 13 of the second liquid-core optical fibers are aligned with the ultraviolet sensing probe 4. For particularly complex and compact partial discharge monitoring target areas 5, the first liquid-core optical fibers 3 can be pre-embedded.

[0021] The beneficial effect of this embodiment is that accurate, multi-point and efficient ultraviolet light transmission and monitoring can be achieved with a single ultraviolet sensor probe 4, which greatly reduces the cost of transmission monitoring.

Claims

1. A device for transmitting ultraviolet partial discharge signals using liquid-core optical fiber, for monitoring the transmission of ultraviolet light generated by partial discharge in high-voltage electrical equipment, characterized in that: It includes a first liquid-core optical fiber and an ultraviolet sensing probe. The optical window at one end of the first liquid-core optical fiber faces the partial discharge position, and the light outlet at the other end of the first liquid-core optical fiber is aligned with the ultraviolet sensing probe.

2. The device for transmitting ultraviolet partial discharge signals using liquid-core optical fiber according to claim 1, characterized in that: It also includes a ring-scanning ultraviolet partial discharge signal coupling device and a second liquid-core fiber, with the first liquid-core fiber aligned with the ultraviolet sensing probe in sequence through the ring-scanning ultraviolet partial discharge signal coupling device and the second liquid-core fiber.

3. The device for transmitting ultraviolet partial discharge signals using liquid-core optical fiber according to claim 2, characterized in that: The ring-scanning ultraviolet partial discharge signal coupling device includes a fixed disk, a rotating disk, and a motor. The fixed disk is fixedly set, and the light outlet of the first liquid-core fiber is arranged on the fixed disk. The rotating disk is driven to rotate by a stepper motor. The optical window of the second liquid-core fiber is fixed on the rotating disk. The optical window on the rotating disk is aligned with or periodically reciprocates with the light outlet of the first liquid-core fiber on the fixed disk. The light outlet of the second liquid-core fiber is aligned with the ultraviolet sensing probe.

4. The device for transmitting ultraviolet partial discharge signals using liquid-core optical fiber according to claim 3, characterized in that: One or more first liquid-core optical fibers are provided, and the light outlets of the multiple first liquid-core optical fibers are arranged in a ring on a fixed disk.

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