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¡¡¡¡As a representative of clean energy, solar photovoltaic power generation is gradually integrating into households, industries, and public facilities. However, its safe operation involves multiple requirements such as electrical specifications, equipment maintenance, and emergency response. The following is a professional analysis of the core points of safe use.
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¡¡¡¡1¡¢ System Design and Installation Specification
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¡¡¡¡Site selection and structural safety:
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¡¡¡¡Photovoltaic arrays should avoid shaded areas, and the spacing between components should meet the requirement of unobstructed exposure for 6 hours a day during the winter solstice to prevent local overheating caused by hot spot effects.
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¡¡¡¡The support foundation needs to undergo geological survey, with a concrete pouring depth of not less than 0.8 meters, and the wind pressure resistance design must comply with the local wind speed standard of once in 50 years.
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¡¡¡¡Electrical isolation design:
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¡¡¡¡The DC side adopts a bipolar disconnect switch, and the AC side is equipped with a four level circuit breaker to ensure complete power cut-off during maintenance.
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¡¡¡¡The installation location of the inverter should maintain a safe distance of at least 3 meters from the residential area, and the heat dissipation channel should be unobstructed to avoid high temperatures causing malfunctions.
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¡¡¡¡2¡¢ Daily operational safety standards
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¡¡¡¡Personal protection requirements:
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¡¡¡¡Maintenance personnel are required to wear insulated gloves, arc resistant face shields, and non slip shoes, and additional insulated boots should be provided during rainy weather operations.
¡¡¡¡½Ó´¥Ö±Á÷µ¼Ìåǰ£¬ÐèÓÃÍòÓñíÑéÖ¤µçѹµÍÓÚ36V£¬·ÀÖ¹µç»÷·çÏÕ¡£
¡¡¡¡Before touching a DC conductor, a multimeter should be used to verify that the voltage is below 36V to prevent the risk of electric shock.
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¡¡¡¡Key points of operation monitoring:
¡¡¡¡Ã¿ÈÕ¼ì²éÄæ±äÆ÷ÏÔʾÆÁ£¬¹Ø×¢¾øÔµ×迹ֵ£¬µÍÓÚ500k¦¸Ê±ÐèÁ¢¼´ÅŲé½ÓµØ¹ÊÕÏ¡£
¡¡¡¡Check the inverter display screen daily, pay attention to the insulation impedance value, and immediately troubleshoot the grounding fault when it is below 500k ¦¸.
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¡¡¡¡Install an environmental monitoring device that automatically starts the cooling fan when the surface temperature of the array exceeds 75 ¡æ.
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¡¡¡¡3¡¢ Equipment maintenance and hazard investigation
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¡¡¡¡Cleaning operation specifications:
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¡¡¡¡Component cleaning should be done in the early morning or evening to avoid excessive temperature differences that may cause glass breakage.
¡¡¡¡Ê¹ÓÃÈíëˢÓëÈ¥Àë×ÓË®£¬½ûÖ¹²È̤×é¼þ±íÃæ£¬·ÀÖ¹ÒþÁѲúÉú¡£
¡¡¡¡Use a soft bristled brush and deionized water, and do not step on the surface of the components to prevent hidden cracks.
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¡¡¡¡Cable inspection standards:
¡¡¡¡Ã¿¼¾¶È¼ì²éÖ±Á÷µçÀÂÍ⻤Ì×£¬·¢ÏÖ¹êÁѳ¤¶È³¬¹ý10cmÐèÕû¶Î¸ü»»¡£
¡¡¡¡Check the outer sheath of the DC cable every quarter and replace the entire section if cracks exceeding 10cm are found.
¡¡¡¡½ÓÍ·´¦Î¶ȼà²â²ÉÓúìÍâÈȳÉÏñÒÇ£¬³¬¹ý»·¾³Î¶È20¡æÊ±Ðè½ô¹ÌÁ¬½ÓÂÝ˨¡£
¡¡¡¡Infrared thermal imaging is used for temperature monitoring at the joint, and the connecting bolts need to be tightened when the ambient temperature exceeds 20 ¡æ.
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¡¡¡¡4¡¢ Emergency response plan
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¡¡¡¡Fire response measures:
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¡¡¡¡Install carbon dioxide fire extinguishers in the array area, and prohibit the use of water-based fire extinguishers to prevent DC arc reignition.
¡¡¡¡·¢Éú»ðÔÖʱ£¬Ê×ÏÈÇжϽ»Á÷²à¶Ï·Æ÷£¬ÔÙÓþøÔµ¹¤¾ß¶Ï¿ªÖ±Á÷ÊäÈë¡£
¡¡¡¡When a fire occurs, first cut off the AC side circuit breaker, and then use insulated tools to disconnect the DC input.
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¡¡¡¡Lightning protection plan:
¡¡¡¡±ÜÀ×ÕëÒýÏÂÏß½ØÃæ»ý²»µÍÓÚ50mm?£¬½ÓµØµç×èСÓÚ4¦¸£¬Ã¿ÄêÓ꼾ǰ¼ì²â¡£
¡¡¡¡The cross-sectional area of the down conductor of the lightning rod shall not be less than 50mm?, and the grounding resistance shall be less than 4 ¦¸. It shall be tested before the rainy season every year.
¡¡¡¡ÀËÓ¿±£»¤Æ÷²ÉÓÃI¼¶+II¼¶Ë«ÖØ·À»¤£¬¶¯×÷µçÁ÷Îó²î¿ØÖÆÔÚ¡À5kAÒÔÄÚ¡£
¡¡¡¡The surge protector adopts dual protection of level I and level II, and the operating current error is controlled within ¡À 5kA.
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¡¡¡¡5¡¢ Special environmental response strategies
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¡¡¡¡High temperature environment:
¡¡¡¡Äæ±äÆ÷²ÕÄÚζȳ¬¹ý45¡æÊ±£¬Ç¿ÖÆÆô¶¯¿Õµ÷ϵͳ£¬±ÜÃâIGBTÄ£¿é¹ýÈÈʧЧ¡£
¡¡¡¡When the temperature inside the inverter compartment exceeds 45 ¡æ, the air conditioning system is forced to start to avoid IGBT module overheating and failure.
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¡¡¡¡The component backplate adopts a high reflectivity coating to reduce the working temperature by 5-8 ¡æ.
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¡¡¡¡Snow cover:
¡¡¡¡ÕóÁÐÇã½Ç´óÓÚ30¡ãʱ£¬×ÔÈ»»¬Âä»ýÑ©ºñ¶È²»³¬¹ý5cm£¬³¬¹ýʱÐèÓÃÈíÖʹΰåÇå³ý¡£
¡¡¡¡When the inclination angle of the array is greater than 30 ¡ã, the natural snow thickness should not exceed 5cm. If it exceeds this, a soft scraper should be used to remove it.
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¡¡¡¡Clean up promptly after cloudy and snowy weather to prevent snowmelt from seeping into the junction box and causing a short circuit.
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¡¡¡¡6¡¢ Personnel training and system construction
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¡¡¡¡Qualification requirements for operation:
¡¡¡¡Î¬»¤ÈËÔ±Ðè³ÖµÍѹµç¹¤Ö¤£¬Ã¿Á½Ä긴Éó£¬ÕÆÎÕÖ±Á÷ϵͳ²Ù×÷¹æ·¶¡£
¡¡¡¡Maintenance personnel need to hold a low-voltage electrician certificate, undergo a review every two years, and master the operating specifications of the DC system.
¡¡¡¡¶¨ÆÚ¿ªÕ¹µç»¡ÉÁÂçʹÊÓ¦¼±ÑÝÁ·£¬ÊìϤÉÕÉ˼±¾ÈÓëÐķθ´ËÕÁ÷³Ì¡£
¡¡¡¡Regularly conduct emergency drills for arc flashover accidents and familiarize oneself with burn first aid and cardiopulmonary resuscitation procedures.
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¡¡¡¡Archive Management Standards:
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¡¡¡¡Establish an equipment history sheet to record installation dates, maintenance records, and component replacement information.
¡¡¡¡±£´æÎåÄêÄÚ·¢µçÊý¾Ý£¬ÓÃÓÚ¹ÊÕÏÇ÷ÊÆ·ÖÎöÓëÊÙÃüÔ¤²â¡£
¡¡¡¡Save power generation data within five years for fault trend analysis and life prediction.
¡¡¡¡Ì«ÑôÄܹâ·ü·¢µçϵͳµÄ°²È«ÔËÐÐÐèÒª¹á´©Éè¼Æ¡¢°²×°¡¢ÔËάȫÉúÃüÖÜÆÚ¡£Í¨¹ýÑϸñÖ´ÐÐµçÆø¸ôÀë¹æ·¶¡¢½¨Á¢Òþ»¼ÅŲé»úÖÆ¡¢Öƶ¨Ó¦¼±Ô¤°¸²¢Ç¿»¯ÈËÔ±Åàѵ£¬¿ÉÏÔÖø½µµÍʹʷçÏÕ£¬Ê¹ÏµÍ³¹ÊÕÏÂʵÍÓÚ0.5´Î/Äê¡£Ëæ×ÅÖÇÄܼà²â¼¼ÊõµÄ·¢Õ¹£¬¹â·üµçÕ¾ÕýÖð²½ÊµÏÖ´Ó±»¶¯Î¬»¤µ½Ö÷¶¯Ô¤·ÀµÄת±ä£¬ÎªÇå½àÄÜÔ´°²È«ÀûÓÃÌṩ¸üÇ¿±£ÕÏ¡£
¡¡¡¡The safe operation of solar photovoltaic power generation systems requires a full lifecycle of design, installation, and operation and maintenance. By strictly implementing electrical isolation standards, establishing hidden danger investigation mechanisms, developing emergency plans, and strengthening personnel training, the risk of accidents can be significantly reduced, resulting in a system failure rate of less than 0.5 times per year. With the development of intelligent monitoring technology, photovoltaic power plants are gradually transitioning from passive maintenance to active prevention, providing stronger guarantees for the safe utilization of clean energy.
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¡¡¡¡This article is a friendly contribution from distributed photovoltaic power generation For more information, please click: We will provide detailed answers to your questions. You are welcome to log in to our website and leave a message
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