Advanced modelling and operation of multiple voltage source inverters for distributed generation

大多数形式的新能源和可再生能源以直流形式或在不方便的频率上以交流形式发电。要将这种能量注入电网，需要一个被称为逆变器的电源转换器。随着此类能源所占比例的上升，逆变器将有望在控制电网方面发挥作用，而不仅仅是供应能源。本研究计划涉及系统的两个方面，这两个方面必须在控制设计得出结论之前建模和理解：逆变器在遭受突然变化（如大负载变化）时的详细动态行为将被建模，数据通信的特性（如延迟和带宽）在塑造远程控制的分布式资源的控制特性中所起的作用将被研究。一旦这一分析与实验观察相对照得到验证，该研究将在新兴的有源配电网络概念的保护下，解决在电力系统中控制逆变器的示例应用。从电网的各个部分形成自给自足的电力岛的控制方面将得到发展，作为在国家电网出现故障时，当地发电机继续向当地用户供电的一种手段。

Most forms of new and renewable energy produce power in DC form or as AC at an inconvenient frequency. To inject this energy into the electricity network requires a power converter known as an inverter. As the proportion of energy from such sources rises, the inverters will be expect to take a role in controlling the network beyond just supply energy. This research proposal addresses two aspects of the system that must be modelled and understood before the control design can be concluded: the detailed dynamic behaviour of the inverters when subjected to sudden changes such as large load changes will be modelled and the role the proprieties of the data communications (such as latency and bandwidth) play in shaping the control properties of remotely controlled distributed resources will be studied. Once this analysis has been verified against experimental observation, the research will tackle an example application of controlling inverters within a power system under the umbrella of the emerging concept of active distribution networks . The control aspects of forming self-sufficient power islands out of fractions of the grid will be developed as a means to continue supplying local customers from local generators when the national system experiences a failure.