Development of Novel Control Strategies and Equivalent Models for Wide-Area Interconnected Hybrid and Multimodal AC-DC Power Systems

为了达到德国和欧洲的政策，实现80%的可再生能源电力供应，整个电力系统需要重组，还需要制定新的控制策略。该项目的目标是(I)通过引入智能功率单元(SPC)的新概念，在考虑现有资产和网络基础设施的情况下构思新的电力系统结构，使大量灵活负荷、多模式接口和分布式电源的协调变得可管理；(Ii)为SPC设计控制策略，以使其能够以支持的方式与输电网、其他SPC和燃气以及区域供热网络进行协调运行；以及(Iii)设计一种基于混合辨识方法的SPC简化动态等值的开发方法，以实现未来广域的时域仿真，以电力电子为基础的分散式混合和多模式交直流电力系统成为可能。工作计划包括六个主要工作包(WP)。在WP1中，对电力系统稳定性研究的建模和仿真方法进行了综述，并利用现有模型实现了初步的仿真研究。在WP2中，通过时域仿真对SPC组件进行建模和单独测试。所得到的模型在WP3中用于构建详细的SPC模型。此外，SPC的控制方案在WP3中进行了设计和测试。然后，在WP4中，分析了所开发的SPC模型(包括所设计的控制方案)对控制信号和物理输入变化的响应的动态行为。此外，在WP5中，混合辨识技术被用来开发一种简化的动态等值的SPC，适用于基于广域电力电子的分散混合和多模交直流电力系统的时域仿真。最后，WP6将包括持续记录项目成果和在期刊、技术报告以及会议记录中的陈述。

In order to reach the German and European policy to achieve an electrical power supply of 80% renewable energy resources, the entire power system needs to be restructured and new control strategies also need to be developed. This project aims (i) to conceive a new power system structure under consideration of existing assets and network infrastructures by the introduction of a new concept termed Smart Power Cell (SPC), which makes the coordination of a large numbers of flexible loads, multimodal interfaces and DGs manageable, (ii) to design control strategies for SPCs in order to enable their coordinated operation to interact with the electrical transmission network, other SPCs and gas as well as district heating networks in a supportive way, and finally (iii) to design a methodology for the development of reduced dynamic equivalents of SPCs based on hybrid identification approaches to make the time domain simulation of future wide area, power-electronics-based decentralized hybrid and multimodal AC-DC power systems possible. The work program comprises six major working packages (WP). In WP1, state of the art modeling and simulation methods for power system stability studies are reviewed and preliminary simulation studies using available models are realized. In WP2, SPC components are modelled and individually tested via time domain simulations. The resulting models are used in WP3 to build a detailed SPC model. Additionally, control schemes for the SPC are designed and tested in WP3. Next, in the WP 4, the dynamic behavior of the developed SPC model including the designed control schemes are analyzed with respect to its response to changing control signals and physical inputs. Further in WP5, hybrid identification techniques are used to develop a reduced dynamic equivalent of an SPC, suitable for time domain simulations of wide-area power-electronics-based decentralized hybrid and multimodal AC-DC-power systems. Finally, WP6 will consist of the continuous documentation of project results and presentation in journals, technical reports as well as in conferences proceedings.