(1) The absorption loss of the photovoltaic array is the power loss from the photovoltaic array through the combiner box to the DC input end of the inverter, including photovoltaic component equipment failure loss, shielding loss, angle loss, DC cable loss, and combiner hilangnya cabang kotak;
(3) The power collection line and box transformer loss are the power loss from the AC input end of the inverter through the box transformer to the power meter of each branch, including the inverter outlet loss, box transformer conversion loss and in-plant line kehilangan;
After analyzing the October data of three photovoltaic power plants with a comprehensive efficiency of 65% to 75% and an installed capacity of 20MW, 30MW and 50MW, the results show that the photovoltaic array absorption loss and inverter loss are the main factors affecting the output dari pembangkit listrik. Among them, the photovoltaic array has the largest absorption loss, accounting for about 20~30%, followed by inverter loss, accounting for about 2~4%, while the power collection line and box transformer loss and booster station loss are relatively small, with a total of about Accounted for about 2%.
Further analysis of the above-mentioned 30MW photovoltaic power station, its construction investment is about 400 million yuan. The power loss of the power station in October was 2,746,600 kWh, accounting for 34.8% of the theoretical power generation. Jika dihitung 1,0 yuan per kilowatt-jam, total kerugian di bulan Oktober adalah 4.119.900 yuan, yang berdampak besar pada manfaat ekonomi pembangkit listrik.
There are many photovoltaic power plant equipment. The 30MW photovoltaic power plant in the above example has 420 combiner boxes, each of which has 16 branches (total of 6720 branches), and each branch has 20 panels (total of 134,400 batteries) Board), the total amount of equipment is huge. The greater the number, the higher the frequency of equipment failures and the greater the power loss. Common problems mainly include burnt out of photovoltaic modules, fire on the junction box, broken battery panels, false welding of leads, faults in the branch circuit of the combiner box, etc. In order to reduce the loss of this part, on the one hand, we must strengthen the completion acceptance and ensure through effective inspection and acceptance methods. The quality of power station equipment is related to the quality, including the quality of the factory equipment, equipment installation and arrangement that meet the design standards, and the construction quality of the power station. Di sisi lain, perlu untuk meningkatkan tingkat operasi cerdas pembangkit listrik dan menganalisis data operasi melalui alat bantu cerdas untuk mengetahui sumber kesalahan tepat waktu, melakukan pemecahan masalah titik-ke-titik, dan meningkatkan efisiensi kerja operasi. and maintenance personnel, and reduce power station losses.
(2) Kehilangan bayangan
(3) Kehilangan sudut
(4) Kerugian inverter
Waktu posting: 20 Des-2021
