Inverter String Allocation in Utility Scale Solar PV Projects: A Practical Approach
摘要
In India, there has been a considerable rise in renewable energy projects, benefiting millions of people. The sunlight falling on earth cannot be converted 100% into electricity as there are numerous losses occurring. Losses due to shadow in PV (Photovoltaic) modules are mainly dependent on parameters like far shadings, near shadings, cloud cover, pitch, tilt of the structure, land terrain, shading obstacles, etc., out of which some are controllable and some are non-controllable. There are several theoretical techniques available for reducing losses due to shading, discussed in the literature review in this research study. However, when it comes to utility scale PV projects, the practical scenario is remarkably unlike the theoretical concept studies and case studies carried out in controlled environments. Dynamic techniques for reconfiguration of string and array in PV projects involve utilization of additional switchgear and DC (Direct Current) cabling, which ultimately increases the capital cost of the project. Whereas static reconfiguration techniques propose shifting the PV module position in structure, which is difficult to implement in existing power plants as the PV modules are fastened using anti-theft fasteners which cannot be opened. This research study proposes a comparison between the dynamic and static reconfiguration techniques which are technically advanced but do not comply with the stringent tariff under which the PV projects are generally installed v/s a simple, economical approach on mitigation of array mismatch losses in utility scale PV power plants with fixed tilt structures. This research study is committed to Net Zero Carbon Target and focusses on the area of research, which is consistent with United Nations Sustainable Development Goals (SDG) 9-Industry, Innovation and Infrastrucrue, and 13-Climate Action.