Advanced HVDC Converter Applications in the Modern Power Grid

现代电网中的先进 HVDC 转换器应用

• 批准号: 4777-2012
• 负责人: Gole, AniruddhaMadhukar
• 金额: $ 3.06万
• 依托单位: University of Manitoba
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=652104
• 关键词: Advanced; HVDC; Converter; Applications; Modern

High Voltage Direct Current (HVDC) transmission is growing in importance. Power generators are usually ac (alternating current) generators, and most loads are also ac. The HVDC transmission system connects these together by transforming the ac voltage to dc and then back to ac. In comparison with ac transmission, HVDC has reduced losses and does not require the sending and receiving end ac networks to be synchronized. Consequently it is seen as a preferred means to transport renewable energy from remote locations such as remote wind farms, to distant load centres. **Conventionally, the Line Commutated Converter (LCC) has been the only type of ac-dc converting equipment to handle large power ratings. Its drawback is that it works poorly under distortion or under-voltage conditions. However, two other types of converter, the Voltage Sourced Converter (VSC) and the Capacitor Commutated Converter (CCC) have recently been introduced and are not susceptible to this problem. As HVDC penetration in the network grows, it is more and more likely that HVDC converters of different types (i.e. LCC, VSC, etc.) will terminate in close proximity and interfere adversely with each other. The resulting system is referred to as a multi-infeed HVDC system. Using advanced computer simulation tools, I intend to investigate the sensitivity of such inter-converter interactions to various network parameters, with a view to establishing guidelines for converter placement. My team and I hope to develop improved control algorithms that would minimize such interaction. Another objective of our research is to develop techniques to estimate the losses in VSC converters, with a view to determining the operating conditions under which these are minimized. **The significant outcome of this research will be the development of study methods, modelling tools and improved designs for multi-infeed HVDC systems and dc grids. This will hopefully result in more robust power transmission schemes that can operate securely, efficiently and reliably.**********

高压直流电流（HVDC）的传输在重要性上增长。发电机通常是AC（交替电流）发电机，大多数负载也是AC。 HVDC传输系统通过将交流电压转换为直流，然后返回AC将它们连接在一起。 与交流传输相比，HVDC减少了损失，不需要发送和接收端AC网络同步。因此，它被视为一种首选方法，可以将可再生能源从偏远地区（例如远程风电场）转移到遥远的负载中心。 **传统上，线路交换器（LCC）是唯一可以处理大功率评级的AC-DC转换设备。它的缺点是它在失真或电压底电压条件下的工作效果不佳。 但是，最近引入了另外两种类型的转换器，电压源转换器（VSC）和电容器交通转换器（CCC），并且不容易受到此问题的影响。 随着HVDC在网络中的渗透率的增长，不同类型的HVDC转换器（即LCC，VSC等）的可能性越来越多，将在近距离接近终止，并且彼此之间会产生不利影响。所得系统称为多馈HVDC系统。 使用高级计算机模拟工具，我打算研究此类相互交互对各种网络参数的敏感性，以期建立转换器放置指南。我和我的团队希望开发改进的控制算法，以最大程度地减少这种互动。 我们研究的另一个目的是开发技术来估计VSC转换器中的损失，以确定最小化的操作条件。 **这项研究的重大结果将是开发研究方法，建模工具和改进的多源HVDC系统和直流网格的设计。希望这将产生更强大的电力传输方案，可以安全，有效，可靠地运行。**********