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以1.6MW_p屋顶分布式光伏发电项目为例,详细介绍其设计流程。综合考虑各方面因素,本项目采用245Wp多晶硅组件和组串型28k W逆变器,设计中彩钢瓦屋顶采用简单可靠的平铺安装方式。将3个区域共计1.6MW_p的光伏系统经逆变后连接汇流集中升压,升压后接入用户10k V母线处。所发电量全部供给厂区负荷就地消纳,余电上网。本项目接入后满足规范相关短路电流表要小于10%的要求。在电气二次设计中,主要考虑了保护配置、光伏发电站调度自动化、计量、系统通信和电能质量监测装置等方面。发电量可以作为光伏电站建设可行性的一个重要指标,根据项目所在地的太阳辐射值,通过相关公式计算得出系统的年发电量预测值,光伏电站运行期25年内的年平均发电量为1568226.99k W·h,年均每瓦发电量为0.953938377k W·h。
Take 1.6MW_p roof distributed photovoltaic power generation project as an example, detailing its design flow. Taking all factors into consideration, this project adopts 245Wp polycrystalline silicon module and string type 28kW inverter. The design of the color steel tile roof adopts the simple and reliable tiling installation method. The PV system with a total area of 1.6MW_p in three regions will be concentratedly boosted and then connected to the user’s 10k V bus after the voltage is boosted and connected. All the electricity supplied to the plant loads on-site consumption, I power online. The access to the project to meet the specifications related to short-circuit ammeter to be less than 10% of the requirements. In the secondary electrical design, the main consideration of the protection configuration, photovoltaic power plant automation scheduling, measurement, system communication and power quality monitoring devices and so on. The power generation capacity can be used as an important indicator of the feasibility of the PV power plant construction. According to the solar radiation value of the project site, the annual power generation forecast value of the system is calculated through the relevant formula. The annual average power generation in the 25-year period of the photovoltaic power station is 1568226.99k W · h, the average annual power generation per watt is 0.953938377k W · h.