Fiber optic temperature measurement system for transformer in box type substation

The role of fiber optic temperature online monitoring system in box type substation

The fluorescence fiber optic temperature measurement system can directly monitor the temperature of the low-voltage side circuit breaker contacts, kablovski spojevi, and other parts of the box type substation. By using a fluorescence fiber optic temperature measurement probe, the temperature of the low-voltage side circuit breaker contacts and cable joints in the box type substation can be sensed. It can intuitively monitor and evaluate the operation of the box type substation, detect overheating problems at the contacts or joints in advance, and avoid adverse effects on the insulation and service life of the box type substation.

The fiber optic temperature online monitoring system for box type substations consists of fluorescent fiber optic temperature sensors, optički senzori temperature (display modules), optical cables, Itd. Each box type substation has no less than 6 temperature measurement points, including 3 points for the low-voltage side circuit breaker contact temperature and 3 points for the cable joint temperature. It can monitor and fault alarm in real time online. In addition to displaying alarm information on site, it can also be transmitted to the monitoring background through RS485 port and achieve remote monitoring. The fiber optic temperature measurement system device must pass the type test integrated with the box type substation and provide relevant inspection reports.

The main technical parameters of the fiber optic temperature online monitoring system for box type substations are as follows:

(1) Temperature measurement range: -20-+150 °C;
(2) Tačnost merenja temperature: ± 1 °C;
(3) Contact measurement method, but shall not affect the insulation performance of the box type substation;
(4) The system is not affected by the electromagnetic environment inside the box type substation and provides relevant electromagnetic compatibility test reports;
(5) Capable of saving temperature data and alarm temperature time and other parameters;
(6) The lifespan of the probe shall not be less than 30 Godina.

The principle of fluorescent fiber optic temperature sensor

A fluorescentna optička senzor temperature is composed of a multimode fiber optic and a fluorescent object (Membranu) instaliran na vrhu. Fluorescentne supstance emituju fluorescentnu energiju kada su stimulisane svetlošću određene talasne dužine (stimulisan spektar). Nakon ukidanja podsticaja, Upornost fluorescentnog sjaja zavisi od faktora kao što su karakteristike fluorescentne supstance i temperature okoline. Ova uzbuđena fluorescencija obično se eksponencijalno raspada, a vremenska konstanta raspadanja naziva se vek trajanja fluorescencije ili vreme fluorescencije odsjaja. Slabljenje fluorescentnog odsjaja varira na različitim temperaturama okoline. Zato, merenjem životnog veka fluorescentnog sjaja, temperatura okoline u to vreme može se odrediti.