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.
Photovoltaic fais fab nroj tsuag feem ntau tiv thaiv hluav taws xob hluav taws xob, suav nrog:
· 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.
Yog tias qhov hluav taws kub pom nyob rau hauv cov chaw fais fab ntawm lub chaw nres tsheb photovoltaic fais fab, lub inverter yuav tsum tau muab tua tam sim ntawd, AC fais fab mov yuav tsum raug txiav tawm, thiab tom qab ntawd lub voj voog ntawm cov hlua photovoltaic yuav tsum raug txiav kom sai li sai tau kom txiav tag nrho. tawm ntawm arc qhov chaw ntawm txoj hlua photovoltaic, thiaj li ua kom muaj kev nyab xeeb ntawm cov neeg ua haujlwm tua hluav taws thiab tswj cov hluav taws kub hauv theem tom qab. .
Nyob rau hauv ib qho teeb meem tseem ceeb, txhawm rau kom tau txais kev pib tua hluav taws thiab tau txais lub sijhawm los tswj cov hluav taws, koj tuaj yeem tua hluav taws nrog hluav taws xob ntawm qhov kev ua kom muaj kev nyab xeeb ntawm tus kheej, thiab txiav tawm lub hwj chim ntawm qhov tsim nyog. sij hawm, tab sis koj yuav tsum xyuam xim rau kev nyab xeeb.
Thaum muaj hluav taws kub hauv qhov chaw nres tsheb photovoltaic, cov neeg tua hluav taws yuav tsum tau ceeb toom thiab ceeb toom sai li sai tau tias cov khoom siv hluav taws xob photovoltaic ntawm lub ru tsev yog hluav taws xob, thiab cov neeg tua hluav taws yuav tsum hnav cov khau insulating. Tsis txhob kov lub cev lossis lub tshuab tua hluav taws hauv koj txhais tes nrog cov xov hlau nyob lossis cov khoom siv hluav taws xob tiv thaiv hluav taws xob thaum tua hluav taws.
Cov chaw tsim hluav taws xob photovoltaic yuav tsum tau nruab nrog cov hluav taws kub txaus- cov khoom siv sib ntaus sib tua, suav nrog cov tshuaj tua hluav taws qhuav, carbon dioxide, 1211, carbon tetrachloride tua hluav taws lossis xuab zeb qhuav. Dej thiab ua npuas dej tua hluav taws raug txwv nruj heev rau hluav taws xob hluav taws xob.
Rau inverters, controllers thiab lwm yam precision ntsuas circuits los yog cov khoom siv hluav taws xob xws li motors uas taug qab brackets, nws yog feem ntau tsis tsim nyog siv cov hmoov qhuav, xuab zeb, thiab lwm yam rau tua hluav taws. Cov pa roj carbon dioxide, 1211, thiab carbon tetrachloride tua hluav taws yuav tsum tau siv los tua hluav taws. Txhawm rau tiv thaiv cov khib nyiab los ntawm kev poob rau hauv cov khoom siv ua rau poob ntau dua.
Nyob rau tib lub sijhawm, nws tseem yuav tsum tau tswj kom muaj kev ncua deb thaum siv cov cuab yeej tua hluav taws:
(1) Rau lub cev muaj qhov hluav taws xob ntawm 10 kV thiab qis dua, qhov kev ncua deb tsawg kawg ntawm lub nozzle thiab lub cev them yuav tsum tsis pub tsawg dua 0.4 m, thiab rau cov uas muaj qhov hluav taws xob ntawm 35 kV thiab siab dua, nws yuav tsum tsis pub tsawg tshaj 0.6 m;
(2) Thaum muaj teeb meem hauv av hauv siab - cov khoom siv hluav taws xob hluav taws xob lossis kab ntawm lub chaw nres tsheb fais fab photovoltaic, cov neeg ua haujlwm cawm hauv tsev yuav tsum tsis txhob nkag rau hauv 4 m ntawm qhov txhaum; Cov neeg ua haujlwm pabcuam sab nraum zoov yuav tsum tsis txhob mus ze li ntawm 8 m ntawm qhov chaw ua txhaum. Thaum nkag mus rau ntau yam saum toj no, lawv yuav tsum hnav cov khau insulating (tiv taus rau qib siab tshaj 10KV), hnav cov hnab looj tes insulating thaum kov lub plhaub thiab cov khoom siv.