According to the interpretation of the 531 New Deal, only village-level poverty alleviation and front-runner projects still have construction indicators in 2018, and most of the first batch of village-level poverty alleviation projects in the "13th Five-Year Plan" are still in the planning and pre-bidding preparatory stage, plus it is likely to be within the year The second batch of poverty alleviation bids was issued, and village-level poverty alleviation became the focus target market in the industry.
The construction of high-quality village-level poverty alleviation power stations not only guarantees the stable income of poor households, but also plays a demonstrative role in accelerating industrial upgrading and guiding the healthy development of the industry. This article takes the 400V grid-connected 300kW poverty alleviation power station as an example to introduce the overall system plan design of the village-level poverty alleviation power station in detail, so as to make sufficient preparations for the construction of high-quality village-level poverty alleviation power station.
System diagram and main configuration of 300kW village-level poverty alleviation power station 
PV module configuration
Taking into account factors such as floor space and full life-cycle benefits, the 300kW village-level power station uses the mainstream 280Wp module in the current poverty-relief power station, and 24 modules are connected in a string, a total of 45 strings.
Inverter configuration
For village-level poverty alleviation power stations, how to reduce costs is a factor that must be considered, and the larger the inverter power, the more advantageous it is in reducing the unit cost of the system. For 300kW village-level poverty alleviation power stations, 400V grid-connected power currently available on the market can be selected The largest 80kW inverter. In this example solution, it is recommended to use 3 SG80KTL + 1 SG60KTL as the optimal solution. Compared with the inverter with 60kW or less power, the system cost can be reduced by at least 12,000 yuan by the "3 + 1" building block design solution. . Considering factors such as power generation efficiency, safety and reliability, the conversion efficiency of SG80KTL is higher than the industry average of 0.2%, and the 300kW poverty alleviation power station in the three types of regions can increase the income by more than 15,000 yuan in 25 years. In addition, the inverter integrates PID night repair function , Effectively reduce the power loss caused by the PID effect of components; adopt intelligent fan cooling, high temperature without derating, effectively increase the amount of power generation, increase power generation revenue; built-in lightning protection and high-precision leakage current protection, double protection to ensure safe and efficient operation of the power station .
Monitoring configuration
The inverter is equipped with a RS485 communication interface as standard, and is connected "hand in hand" through a communication cable. Only one of the inverters needs to be equipped with an EyeM2 wireless communication module, which uploads all data centrally, which not only makes networking easier, It can save communication module and traffic costs. At the same time, it can scan the QR code of the communication module through the Sunshine Cloud APP to access the smart energy management platform, and scan the code with one key to build a station, which greatly improves the efficiency of building a station.
DC cable
The DC cable is connected to the photovoltaic module and the inverter, and is laid outdoors, and it is laid in an open tube. Pay attention to moisture, sun, cold and high temperature exposure. The reference standard of photovoltaic DC cable withstand voltage "2Pfg 1169/08. 2007 Requrements for cables for use in photovoltaic-system", choose common PV1-F 1 * 4mm? Standard cable to meet the needs of DC cables.
AC cable
AC cables are mainly used from the AC side of the photovoltaic grid-connected inverter to the AC combiner box or grid-connected cabinet. They are also installed outdoors. In addition to moisture, sun, cold, and radiation protection, fire and rat bites must also be considered According to GB50217-94 "Code for Design of Power Engineering Cables", ZR-RVV-1.0-3 * 35 mm2 and ZR-RVV-1.0-3 * 25mm2 are selected for AC cables.
Ground cable
The grounding cable is mainly used for the grounding of components, supports and AC output. According to GB14050-1993 "Types of System Grounding and Safety Technical Requirements", the grounding wire ZR-RVV-1.0-1 * 16 mm2 is selected.
Intelligent operation and maintenance
In terms of power station management, with the increase in the number of village-level poverty alleviation power stations, the poverty alleviation offices or government personnel at all levels quickly, comprehensively and clearly understand the performance data, project progress, power station status, power generation and other information of all poverty alleviation organizations in the jurisdiction, making it difficult . The Smart Energy Poverty Alleviation Platform applies a new regional management model to greatly improve management efficiency.
In terms of operation and maintenance, from the perspective of cost, the village-level poverty alleviation power station is not suitable for dispatching personnel to stay in operation and maintenance for a long time. The timely detection, analysis, and resolution of faults require the development of flexible and efficient operation and maintenance programs. Advanced enterprises in the photovoltaic industry create a smart brain for photovoltaic power plants through modern Internet of Things technology, artificial intelligence and big data analysis technology, realizing real-time monitoring, intelligent analysis and diagnosis, and rapid positioning of the power plant. In this example design plan, the power station is connected to a smart energy poverty alleviation platform. In addition to the above functions, an intelligent dispatch function is added to eliminate deficiencies in a timely manner, making the operation and maintenance of village-level poverty alleviation power stations more efficient.
Village-level poverty alleviation power station is the mainstream construction mode of photovoltaic poverty alleviation power station. From equipment selection, scheme design to later operation and maintenance, we must choose the first-line brand in the industry, high standards and strict requirements to build a conscience project, to ensure that the power station operates efficiently and reliably for 25 years Only in this way can we earnestly guarantee the income of poor households and finally win the battle of poverty alleviation!
Grease GUN
SUZHOU CREATION SPACE INTELLIGENT TECHNOLOGY CO.,LTD , https://www.pkanglegrinder.com