Partial discharge optical sensor external system and method based on one-to-many optical fiber
An optical sensor and multi-fiber technology is applied in the direction of using optical methods for testing, circuit breaker testing, and dielectric strength testing. It can solve problems such as insulation performance degradation, unbearable air pressure levels, and difficult GIS equipment promotion and application. The effect of maintaining safe and stable operation, avoiding insulation performance degradation, and increasing utilization
Pending Publication Date: 2022-04-19
JIANGSU ELECTRIC POWER CO
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Problems solved by technology
[0006] However, although photometry has great advantages over other partial discharge detection methods, and there are already miniature and sensitive optical sensors that can be applied to partial discharge detection of individual power equipment, it is difficult to popularize and apply them in GIS equipment
The reason is that the interior of the GIS equipment shell is filled with sulfur hexafluoride gas, forming a high-pressure environment, and the existing partial discharge optical sensors cannot withstand the standard air pressure level of GIS equipment; in addition, due to the compact structure of GIS equipment, During its normal operation, a high field strength environment will be formed in the space, which may affect the normal operation of the partial discharge optical sensor, and the built-in sensor may affect the distribution of the electric field of the GIS equipment, resulting in a decline in insulation performance
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[0043] The application will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, but not to limit the protection scope of the present application.
[0044] Such as figure 1 and 2 As shown, a kind of partial discharge optical sensor external system based on one point multi-fiber of the present invention comprises:
[0045]The front-end optical fiber probe 1, which is equipped with a multi-core optical fiber 6, is used for collecting and extracting the partial discharge discharge beam in the gas insulated switchgear;
[0046] During specific implementation, the front-end optical fiber probe 1 is installed in the casing of the gas insulated switchgear through a prefabricated opening or a prefabricated flange 13 .
[0047] The outer layer of the front-end fiber optic probe 1 is provided with a casing 8 to ensure the firmness of the front-end fib...
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The invention discloses a partial discharge optical sensor external system and method based on a one-to-many optical fiber, and the method comprises the steps: a front-end optical fiber probe is provided with a multi-core optical fiber, and collects a discharge light beam of partial discharge in a gas insulated switchgear; the optical splitter equally divides the multi-core optical fiber into a plurality of groups of multi-core optical fibers so as to uniformly divide the discharge light beam into a plurality of groups of light beams; the transmission light path module packages the multiple groups of sub-multi-core optical fibers equally divided by the optical splitter into multiple groups of transmission light paths, and the multiple groups of transmission light paths transmit multiple groups of light beams uniformly divided by the discharge light beams respectively; the light filtering coating filters out the light beams in the specific spectral band to obtain multispectral signals; the optical sensor converts the multispectral signal into a photocurrent signal. According to the invention, the external arrangement of the partial discharge optical sensor for the gas insulated switchgear is realized, the influence of high pressure and high field intensity environment in the GIS on the working performance of the optical sensor is avoided, and the reduction of the insulation performance of the GIS caused by the arrangement of the sensor is also avoided.
Description
technical field [0001] The invention belongs to the technical field of power equipment detection, and relates to an external system and method for a partial discharge optical sensor based on one-point multi-fiber. Background technique [0002] Gas insulated switchgear (GIS, Gas insulated Switchgear) seals the main equipment in the substation, such as disconnectors, circuit breakers, grounding switches, transformers, lightning arresters and busbars, in a metal shell, and fills the shell with high-pressure gas Sulfur hexafluoride gas realizes gas insulated switchgear, which has the advantages of good insulation performance, small footprint, low maintenance cost, and strong environmental adaptability. It is currently widely used in power systems. [0003] However, in the assembly, transportation or long-term operation of GIS equipment, it is inevitable that there will be faults and defects accompanied by the occurrence of partial discharge. Long-term partial discharge will dam...
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IPC IPC(8): G01R31/327G01R31/12
CPCG01R31/327G01R31/1218
Inventor陈平缪金费彬黄芬吴俊锋冷兆云万杰枫任明
OwnerJIANGSU ELECTRIC POWER CO