IS200EGDMH
独立发电厂是指未连接到电网的发电厂，包括
光伏板和存储系统，该系统还保证了电力供应
照明不良或黑暗时。由于PV提供的电流
发电机为直流电源，如果用户工厂需要交流电流，则逆变器变为
必需的从技术和财务角度来看，此类工厂具有优势
当电网不存在或不容易时的视图
更换电动发电机组。
此外，在独立配置中，PV场尺寸过大，因此
在日照时间内，负荷供应和充电
电池的储存可以保证有一定的安全余量
考虑到日晒不良的日子。
目前，常见的应用程序用于提供：
•抽水设备；
•无线电中继器、天气或地震观测和数据传输
车站；
•雷电系统；
•道路、港口和机场的标志系统；
•营地服务供应；
•广告装置；
•在高海拔地区避难。
5.3.2并网发电厂
并网发电厂在小时内从电网中获取电力
当光伏发电机无法产生满足
消费者的需求。
相反，如果光伏系统产生多余的电力，剩余的
被放入电网，因此可以作为一个大型蓄能器运行：作为
因此，并网系统不需要蓄电池组。
这些发电厂具有分布式而非集中式发电的优势：事实上，在消费区附近生产的能源价值更高
因为
损失有限，大型运输和调度电力的费用
系统减少。此外，在日照时间内的能量生产
允许在白天减少对电网的要求，即
需求更高。


Stand-alone plants are plants which are not connected to the grid and consist of PV panels and of a storage system which guarantees electric energy supply also when lighting is poor or when it is dark. Since the current delivered by the PV generator is DC power, if the user plant needs AC current an inverter becomes necessary. Such plants are advantageous from a technical and financial point of view whenever the electric network is not present or whenever it is not easy to reach, by replacing motor generator sets. Besides, in a stand-alone configuration, the PV field is over-dimensioned so that, during the insolation hours, both the load supply as well as the recharge of the storing batteries can be guaranteed with a certain safety margin to take into account the days of poor insolation. At present the most common applications are used to supply: • pumping water equipment; • radio repeaters, weather or seismic observation and data transmission stations; • lightning systems; • systems of signs for roads, harbors and airports; • service supply in campers; • advertising installations; • refuges at high altitudes. 5.3.2 Grid-connected plants Permanently grid-connected plants draw power from the grid during the hours when the PV generator cannot produce the energy necessary to satisfy the needs of the consumer. On the contrary, if the PV system produces excess electric power, the surplus is put into the grid, which therefore can operate as a big accumulator: as a consequence, grid-connected systems don’t need accumulator banks. These plants offer the advantage of distributed - instead of centralized – generation: in fact the energy produced near the consumption area has a value higher than that produced in traditional large power plants, because the transmission losses are limited and the expenses of the big transport and dispatch electric systems are reduced. In addition, the energy production in the insolation hours allows the requirements to the grid to be reduced during the day, that is when the demand is higher.