High-power voltage-source converter topologies, modeling, and analysis framework for future AC-DC supergrids

未来AC-DC超级电网的大功率电压源转换器拓扑、建模和分析框架

• 批准号: RGPIN-2017-06633
• 负责人: Wang, Liwei
• 金额: $ 3.5万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=761781
• 关键词: power; voltage; source; converter; topologies

The development of sustainable energy from renewable resources such as wind, solar, tidal, and biomass energy has been identified as a key strategic area in Canada. The large-scale integration of renewable energy sources into power grids has been challenging due to the often remote locations of the renewables and high fluctuations in energy production. Voltage-source-converter (VSC) high voltage DC (HVDC) transmission is the key enabling technology for the integration of renewables into power grids due to its efficient energy transmission and excellent energy flow control. However, for the VSC HVDC transmission to have broader applications, research is critically required to overcome current technological barriers to improve transmission efficiency, reduce converter costs, and increase the transmission fault-resilience.This Discovery research program will focus on the development of new high-power VSC HVDC technologies and associated analysis platforms to improve the performance of HVDC transmission for renewable energy integration. Ultimately these studies will lead to improved design, control, and protection of future AC-DC interconnected grids. The short-term objectives of the proposed research are to investigate new modular multilevel converter topologies which can reduce point-to-point HVDC converter loss by ~0.1-0.2%, increase converter compactness by ~50%, and provide strong support to AC grids during faults. Another short-term objective is to develop advanced converter models and simulation algorithms for the proposed AC-DC power systems. To achieve these short-term objectives, new modular multilevel converter technologies will be investigated, including (1) hybrid converter architectures that integrate two-level and multilevel converter topologies, (2) new modular multilevel converter submodules that overcome shortcomings of conventional designs, e.g. half-bridge, full-bridge, or clamped-double submodules, (3) accurate average-value models for the proposed converters, and (4) new parallel hybrid simulation algorithms for power system transient stability and electromagnetic transient analysis. The proposed research program will contribute to the development of next-generation VSC HVDC technologies with high efficiency, improved reliability, and reduced costs. It will have significant beneficial impacts on reducing Canada's carbon footprint by integrating large-scale renewable energy sources into power grids. The technology advances developed in this Discovery program will be transferable to Canadian and international power industries. HQP will have unique opportunities to gain skills in renewable energy integration research and to participate in collaborations with various industrial partners, including Canadian power utility companies, power system simulation companies, and global power equipment companies.

从风能、太阳能、潮汐能和生物质能等可再生资源中开发可持续能源已被确定为加拿大的一个关键战略领域。由于可再生能源往往位于偏远地区，而且能源生产波动很大，因此将可再生能源大规模整合到电网中一直具有挑战性。电压源变换器（VSC）高压直流输电因其高效的能量传输和良好的能量流控制能力而成为可再生能源并网的关键使能技术。然而，为了使VSC高压直流输电得到更广泛的应用，迫切需要研究克服现有的技术障碍，提高输电效率，降低变频器成本，增加输电的容错能力。该发现研究项目将专注于开发新的大功率VSC高压直流技术和相关分析平台，以提高可再生能源整合的高压直流输电性能。最终，这些研究将改进未来交直流互联电网的设计、控制和保护。提出的研究的短期目标是研究新的模块化多电平转换器拓扑结构，该拓扑结构可以将点对点HVDC转换器的损耗降低~0.1-0.2%，将转换器的紧凑度提高~50%，并在故障期间为交流电网提供强有力的支持。另一个短期目标是为拟议的交直流电力系统开发先进的变换器模型和仿真算法。为了实现这些短期目标，将研究新的模块化多电平转换器技术，包括(1)集成双电平和多电平转换器拓扑结构的混合转换器架构；(2)克服传统设计缺点的新型模块化多电平转换器子模块，例如半桥、全桥或钳位双子模块；(3)所提出的转换器的精确平均值模型；(4)电力系统暂态稳定与电磁暂态分析并行混合仿真新算法。拟议的研究项目将有助于开发效率高、可靠性高、成本低的下一代VSC高压直流技术。通过将大规模可再生能源整合到电网中，它将对减少加拿大的碳足迹产生重大的有益影响。在“发现”项目中开发的先进技术将转移到加拿大和国际电力工业。HQP将有独特的机会获得可再生能源整合研究方面的技能，并参与与各种工业伙伴的合作，包括加拿大电力公用事业公司、电力系统模拟公司和全球电力设备公司。