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，实现电力供应80%的可再生能源，整个电力系统需要重组，也需要制定新的控制策略。该项目旨在(i)通过引入智能电池（SPC）的新概念，在考虑现有资产和网络基础设施的情况下，构想一种新的电力系统结构，该概念使大量灵活负载、多模式接口和dg的协调可管理；（ii）设计SPC的控制策略，使其协调运行，与电力传输网络相互作用。最后（iii）设计一种方法，用于开发基于混合识别方法的spc的减少动态等价物，从而使未来广域、基于电力电子的分散混合和多模态交流-直流电力系统的时域模拟成为可能。工作计划包括六个主要工作包。在WP1中，回顾了电力系统稳定性研究的最新建模和仿真方法，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。得到的模型在WP3中用于构建详细的SPC模型。此外，在WP3中设计和测试了SPC的控制方案。接下来，在WP 4中，开发的SPC模型（包括设计的控制方案）的动态行为将根据其对变化的控制信号和物理输入的响应进行分析。此外，在WP5中，混合识别技术用于开发SPC的简化动态等效，适用于广域电力电子分散混合和多模态交流-直流电源系统的时域仿真。最后，WP6将持续记录项目成果，并在期刊、技术报告和会议记录中进行介绍。

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.