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.**********

高压直流输电（HVDC）的重要性日益增加。发电机通常是交流发电机，大多数负载也是交流的。高压直流输电系统通过将交流电压转换为直流电压，然后再转换回交流电压，将这些电压连接在一起。 与交流输电相比，高压直流输电降低了损耗，并且不要求发送端和接收端交流网络同步。因此，它被视为将可再生能源从远程位置（如远程风电场）运输到远程负载中心的首选手段。** 通常，线路换向 换流器（LCC）一直是唯一类型的交流-直流转换设备，以处理大功率额定值。它的缺点是在失真或欠压条件下工作不佳。 然而，最近已经引入了两种其他类型的转换器，电压源转换器（VSC）和电容器换向转换器（CCC），并且不容易受到该问题的影响。 随着HVDC在网络中渗透的增长，越来越有可能使用不同类型的HVDC换流器（即LCC、VSC等）。将终止于非常接近的位置并且彼此不利地干扰。由此产生的系统被称为多馈入HVDC系统。 使用先进的计算机仿真工具，我打算调查的敏感性，这种转换器间的相互作用，以各种网络参数，以期建立转换器的位置的指导方针。我和我的团队希望开发出改进的控制算法，以最大限度地减少这种相互作用。 我们的研究的另一个目标是开发技术，以估计在VSC转换器的损失，以确定这些被最小化的操作条件下。** 这项研究的重要成果将是开发研究方法、建模工具和改进多馈入HVDC系统和直流电网的设计。这将有望产生更强大的电力传输方案，可以安全，高效和可靠地运行。