VSC-HVDC Protection and Control

VSC-HVDC技术的良好知识目前仅由制造商掌握（出于竞争原因，他们不想分享）。考虑到进入英国的VSC-HVDC链路的潜在数量，以及该技术的快速计划推出，公用事业公司和政府需要更好地了解VSC-HVDC。一个关键的弱点是，目前大多数VSC-HVDC的公共领域研发是基于简化的仿真模型。这无法捕获关键硬件复杂性。实时控制对系统运行的限制是这里的关键因素。硬件中的非线性是另一个问题。迫切需要研究开发一种低功耗的硬件模型，特别是解决了实时控制问题，以开发更好的模型，这一组件，并允许公用事业网络开发更好的理解硬件。博士将构建模块化多电平VSC-HVDC换流器的低功耗缩减规模硬件模型。控制动态将尽可能地被保留，使得每个子模块的控制器将从主控制器被划分，以测试多层控制概念。这种系统控制的算法将被探索。在这方面，将评估目前用于网络建模的电力系统模型的保真度，并酌情提出改进建议。如果时间允许，将检查英国公用事业MTTE项目中使用的硬件模型与实时数字仿真（RTDS）的接口。博士学位将涉及软件编程（FPGA和微控制器），实时控制，传感和测量，电子，电力电子，硬件在环，以及一些电力系统建模和分析。

Good knowledge of VSC-HVDC technology is presently held only by the manufacturers (who for competitive reasons do not want to share). Given the potentially large number of VSC-HVDC links into the UK, and the rapid planned rollout of the technology the utilities and government need to develop a better understanding of VSC-HVDC. A key weakness is that presently most public domain R&D on VSC-HVDC is based on simplified simulation models. This fails to capture key hardware complexities. The limitations real-time control places on system operation is a key element here. Nonlinearities in the hardware are a further problem. There is an urgent need for research to develop a low-power hardware model that particularly addressed the real-time control issues to develop better models of this component and allow the utility networks to develop a better understanding of the hardware. The PhD will construct a low-power reduced-scale hardware model of a modular multi- level VSC-HVDC converter. As far as possible the control dynamics will be preserved so that the controller for each sub-module will be partitioned from the master controller, to test multi-layer control concepts. Algorithms for such system control will be explored. The fidelity of power system models presently used for network modelling will be assessed in this context, and improvements suggested as appropriate. If time permits, interfacing the hardware model with Real-Time Digital Simulation (RTDS) will be examined of the type used in the UK utility MTTE project. The PhD will involve software programming (both FPGA and microcontroller), real-time control, sensing and measurement, electronics, power electronics, hardware-in-the-loop, as well as some power systems modelling and analysis.