Wuxi Power Supply Branch of State Grid Jiangsu Electric Power Co., Ltd.

Jin Miao

Junfeng Wu

Yin Gu

Ping Chen

Xi Wu

Bin Fei

Zhaoyun Leng

Haiping Shen

Xinyang Zhou

Jiefeng Wan

Ming Ren

Fen Huang

Jun Qin

A method for determining phase locking of critical arc light includes: step: monitoring and collecting light radiation intensity of an arc inside a switch cabinet in real time, and converting the collected light radiation intensity into an electrical signal; step: extracting a power-frequency fundamental wave of the electrical signal, comparing an amplitude of the power-frequency fundamental wave of the electrical signal with a first threshold, and generating a pre-warning signal based on a comparison result of the first threshold; step: comparing the amplitude of the power-frequency fundamental wave of the electrical signal with a second threshold voltage, and generating a control signal based on a comparison result of the second threshold voltage and a protection time threshold; and step: protecting the switch cabinet under the critical arc light environment based on the pre-warning signal and the control signal.

Method and apparatus for determining phase locking of critical arc light

A partial discharge (PD) detection apparatus for gas-insulated equipment includes a photon collector, an optical splitter, a first photoelectric conversion module, an ultraviolet fluorescent crystal, a second photoelectric conversion module, and a signal processing module, where the ultraviolet fluorescent crystal is configured to convert a second optical radiation signal into an optical radiation signal of an ultraviolet fluorescence band, and the signal processing module is configured to calculate first apparent intensity based on a first voltage signal output by the first photoelectric conversion module, calculate second apparent intensity based on a second voltage signal output by the second photoelectric conversion module, and determine discharge intensity of the optical radiation based on a ratio of the second apparent intensity to the first apparent intensity. Technical solutions of the present disclosure are not affected by an unknown distance between a discharge position and a detection point.

Partial discharge (PD) detection apparatus for gas-insulated equipment

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Jiangsu, China

Jin Miao