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首页> 外文期刊>International journal of electrical power and energy systems >Climate-friendly and socially inclusive AC-DC renewable energy system with overlay multi-terminal HVDC network (OVANET): Solution with fully distributed optimization and infrastructure combination
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Climate-friendly and socially inclusive AC-DC renewable energy system with overlay multi-terminal HVDC network (OVANET): Solution with fully distributed optimization and infrastructure combination

机译：具有覆盖多终端HVDC网络（Ovanet）的气候友好型和社会包容性AC-DC可再生能源系统：具有完全分布式优化和基础设施组合的解决方案

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A large-scale integration of wind and solar energy relies on a grid that allows for the renewable electric power to securely reach the load centers. While the necessity for the extension of transmission capacity to obtain a climate-friendly and sustainable overall energy system is given by physical evidence, the realization of any extension relies on social acceptance and the support of all involved stakeholders. This is where the overall contribution of this paper comprises three dimensions. Firstly, thanks to the modular multi-level converter (MMC), it has become possible to realize multi-terminal DC overlay networks that lend themselves for connection with AC grids. The full AC-DC integration is at the core of the first dimension and aimed at offering a high flexibility of control when addressing security and efficiency. Secondly, as the AC-DC grid may stretch across multiple countries and therefore also diverse transmission system operator (TSO) control areas, it is important that a desired degree of data privacy and autonomy within those areas can be preserved. This is made possible by the proposed distributed AC-DC power flow optimization based on a modified fully parallel Alternating Direction Method of Multipliers (ADMM). The formulated local physical consensus constraints for boundary variables at the locations of tearing only rely on exchange of information with immediate neighbors. The physical consensus constraints are complemented by the newly introduced operational consensus constraints to prevent conflicting operational control actions. Thirdly, it is shown how social acceptance can be boosted by having the transmission lines share the corridors with other transport infrastructures. Of particular interest in this context are DC cable tunnels along motorways and the joint usage of bridges, leading to a combination of infrastructures. This also readily supports the development of electric vehicle charging stations along motorways. Together, these three dimensions provide the foundations of the proposed OVANET concept of socially inclusive AC-DC grids for renewable energy transmission.
机译：风和太阳能的大规模集成依赖于栅格，允许可再生电力安全地到达负载中心。虽然通过物理证据给出了延长传输能力以获得气候友好和可持续的整体能源系统的必要性，但是实现任何延伸的实现依赖于社会接受以及所有参与利益相关者的支持。这是本文的整体贡献包括三维。首先，由于模块化的多级转换器（MMC），可以实现为与AC网格连接而提供的多终端直流覆盖网络。完整的AC-DC集成位于第一维的核心，旨在在解决安全性和效率时提供高度控制的灵活性。其次，由于AC-DC网格可能会跨越多个国家，因此也是不同的传输系统运营商（TSO）控制区域，因此可以保留这些区域内所需的数据隐私和自主程度是重要的。这是基于乘法器（ADMM）的改进的完全平行交流方向方法所提出的分布式AC-DC功率流优化。撕裂位置的边界变量的制定的本地物理共识约束仅依靠与即时邻居的信息交换。新引入的业务共识约束补充了物理共识约束，以防止相互冲突的运营控制行动。第三，示出了如何通过使传输线与其他传输基础设施共享走廊来提升社会接受。特别感兴趣的情况下是沿着高速公路的直流电缆隧道和桥梁的联合使用，导致基础设施的组合。这也很容易支持沿高速公路的电动车辆充电站的开发。这三个维度在一起提供了用于可再生能源传输的社会包容性AC-DC网格的提出的Ovanet概念的基础。

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