With the photovoltaic power station, especially the rooftop distributed photovoltaic power generation has been widely popularized. While photovoltaic power generation benefits the people, there are often reports of fire accidents or even accidental personal injury and major property losses due to photovoltaic power plants. Today, let's discuss the fire safety issues that should be paid attention to during the operation and maintenance of photovoltaic power plants.
The DC side of photovoltaic power generation has high voltage and large current. There are many string connectors, and the installation environment is complicated. Many connectors are exposed to sunlight or exposed to wind and rain, which are prone to poor contact and even fire, burning and other fire hazards. Electrical fires are very dangerous, and once they happen, the losses will be heavy. Therefore, the principle of "prevention first" must be implemented to prevent electrical fires before they occur.
Plant elektrik fotovoltaik sitou anpeche dife sikwi, tankou:
· The DC side connector sparks the arc and causes a fire;
· Fire caused by equipment failure (combiner box, inverter, distribution box, transformer, high and low voltage switchgear, etc.);
· Lightning strikes cause fire, etc.
Si yo jwenn yon dife nan enstalasyon pouvwa yo nan estasyon elektrik fotovoltaik la, yo ta dwe etenn varyateur la imedyatman, yo ta dwe koupe ekipman pou pouvwa AC la, ak Lè sa a, kous la nan fisèl fotovoltaik la ta dwe dekonekte pi vit ke posib konplètman koupe. koupe sous arc nan fisèl fotovoltaik la, konsa tankou asire sekirite nan pèsonèl ponpye ak kontwole dife a nan etap la pita. .
Nan yon sitiyasyon kritik, yo nan lòd yo jwenn inisyativ la etenn dife a ak jwenn tan kontwole dife a, ou ka mete dife a ak elektrisite sou kondisyon pou asire sekirite pèsonèl, ak Lè sa a koupe ekipman pou pouvwa a nan apwopriye. tan, men ou dwe peye atansyon sou sekirite.
Nan evènman an nan yon dife nan yon estasyon elektrik fotovoltaik, ponpye yo ta dwe enfòme ak raple pi vit ke posib ke ekipman an fotovoltaik sou do kay la elèktrifye, ak ponpye yo ta dwe mete soulye izolasyon. Pa manyen kò a oswa aparèy pou etenn dife a nan men ou ak fil kouran oswa ekipman elektrik pou anpeche chòk elektrik pandan ponpye.
Plant elektrik fotovoltaik yo ta dwe ekipe ak ase ekipman pou kont dife -, tankou aparèy pou etenn dife poud sèk, gaz kabonik, 1211, aparèy pou etenn dife tetrachloride kabòn oswa sab sèk. Dlo ak mous pou etenn dife yo entèdi pou dife elektrik.
Pou varyateur, contrôleur ak lòt sikwi enstriman presizyon oswa ekipman elektrik tankou motè ki swiv parantèz, li jeneralman pa apwopriye pou itilize poud sèk, sab, elatriye pou etenn dife. Yo ta dwe itilize gaz kabonik, 1211, ak tetrachloride kabòn pou etenn dife a. Yo nan lòd yo anpeche debri soti nan tonbe nan ekipman an lakòz pi gwo pèt.
An menm tan an, li nesesè tou pou kenbe yon distans sèten lè w ap itilize ekipman pou etenn dife:
(1) Pou kò a ki gen yon vòltaj 10 kV ak anba a, distans minimòm ant bouch la ak kò a chaje pa ta dwe mwens pase 0.4 m, ak pou moun ki gen yon vòltaj. nan 35 kV ak pi wo a, li pa ta dwe mwens pase 0.6 m;
(2) Lè gen yon fay nan tè a nan ekipman elektrik wo -vòltaj oswa liy nan estasyon elektrik fotovoltaik la, pèsonèl sekou andedan kay la pa dwe antre nan 4 m soti nan pwen fay la; pèsonèl sekou deyò a pa dwe apwoche nan 8 m soti nan pwen an fay. Lè w ap antre nan seri ki anwo a, yo dwe mete soulye izolasyon (rezistan nan nivo Voltage pi wo a 10KV), mete gan izolasyon lè yo manyen koki ak ankadreman ekipman an.