Enhanced Renewable Integration through Flexible Transmission Options (ERIFT)

通过灵活的传输选项增强可再生能源整合 (ERIFT)

• 批准号: EP/K006312/1
• 负责人: Tim Green
• 金额: $ 112.18万
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2013
• 资助国家: 英国
• 起止时间: 2013 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FK006312%2F1
• 关键词: Enhanced; Renewable; Integration; through; Flexible

China is installing wind farms faster than any other nation and the UK is leading deployment of offshore wind farms. Both nations will face challenges in connecting renewable sources in remote areas over (electrically) long cable or overhead DC routes and also challenges in controlling a system with a high proportion of asynchronous generation. This proposal identifies areas of common technical challenge and lays out a joint programme to analyse the issues and assess possible solutions. Fully exploiting the potential transfer capacity is vital; in China this is from western/central hydro resources to eastern/costal cities and in the UK from Scottish and North Sea wind resource to southern load centres. The realisable transfer capacity from a set of AC and DC routes depends on exactly how the control of the system is arranged under differ loading conditions (which affects stability constraints) and on the risk profile of the configuration (which affects the de-loading for redundancy and security reasons). We will investigate coordinated control of AC, DC and FACTS elements to optimise transfer capacity and will develop tools to support operator decision-making including risk analysis. A national transmission system run with a high proportion of asynchronous generation has little inertia and so explicit frequency response needs to be synthesised to maintain the system frequency within limits. Two specific aspects will be investigated: the ability to provide frequency response services across a DC link (from kinetic energy from wind turbines at the remote end) without explicit communication of frequency data and the headroom required in power converters (turbine and HVDC) to accommodate this service. The protection schemes that identify and isolated faulty equipment are also impacted by use of asynchronous generation since their power converter interfaces offer much lower short-circuit currents that are difficult to discriminate. The problem will be analysed in detail and re-engineering of the protection schemes proposed. A series of technical challenges that arise from widespread use of HVDC to connect remote renewable resources will also be studied. First is the operation and protection of multi-terminal HVDC that would allow meshing of DC routes to form more secure networks providing that the power flow and fault management issues can be addressed. Second is the reassessment of wind farm collection networks to eliminate potentially wasteful energy conversion stages. Third is innovation in HVDC converter design to make cost-effective the supply (or in-feed) of small fractions of power at intermediate points.The main programme of work will be conducted by post-doctoral research associates in China and the UK each of whom will have a 3-month placement in the other country to deepen the interaction between the research teams. In China, PhD projects will also be arranged around the key research themes. In the UK, the work will be allied to the existing PhD cohorts in the universities. A steering committee that meets alternately in China and the UK will manage the programme.The key outputs will be the analysis methods that are developed to assess the problems identified (and which are useful to grid system operators); proposals for engineering solutions (useful to system operators and equipment vendors) and verification of these proposals through scaled laboratory test systems and real-time simulation.

中国安装风电场的速度比其他任何国家都快，英国正在领先部署海上风电场。这两个国家都将面临通过长电缆或架空直流线路连接偏远地区可再生能源的挑战，以及控制异步发电比例高的系统的挑战。该提案确定了共同的技术挑战领域，并提出了一项联合方案，以分析问题和评估可能的解决办法。充分利用潜在的输电能力至关重要;在中国，这是从西部/中部水力资源到东部/沿海城市，在英国，这是从苏格兰和北海风力资源到南部负荷中心。一组AC和DC线路的可实现传输容量取决于在不同负载条件下如何安排系统的控制（这会影响稳定性约束）以及配置的风险状况（这会影响冗余和安全原因的卸载）。我们将研究AC、DC和FACTS元件的协调控制，以优化传输容量，并将开发支持运营商决策的工具，包括风险分析。一个全国性的输电系统运行的异步发电比例很高，惯性很小，因此需要合成显式的频率响应，以保持系统频率在限制范围内。将研究两个具体方面：在没有频率数据的显式通信的情况下通过DC链路（来自远端风力涡轮机的动能）提供频率响应服务的能力，以及功率转换器（涡轮机和HVDC）中容纳该服务所需的净空。识别和隔离故障设备的保护方案也受到异步发电的影响，因为它们的电源转换器接口提供的短路电流要低得多，难以区分。将详细分析这一问题，并提出重新设计保护计划的建议。还将研究广泛使用HVDC连接远程可再生资源所带来的一系列技术挑战。首先是多端HVDC的操作和保护，这将允许DC路由的网格化以形成更安全的网络，前提是可以解决功率流和故障管理问题。其次是重新评估风电场收集网络，以消除潜在的浪费能源转换阶段。第三是高压直流换流器设计的创新，使中间点的小部分电力供应（或馈入）具有成本效益。主要工作计划将由中国和英国的博士后研究人员进行，他们每个人都将在对方国家进行为期3个月的实习，以加深研究团队之间的互动。在中国，博士项目也将围绕重点研究主题进行安排。在英国，这项工作将与大学中现有的博士生群体结盟。该项目将由一个在中国和英国轮流召开会议的指导委员会负责管理，主要成果将是为评估所发现的问题而开发的分析方法（对电网系统运营商有用）;工程解决方案的建议（对系统运营商和设备供应商有用），以及通过规模化的实验室测试系统和实时模拟对这些建议进行验证。

项目成果

Frequency support from modular multilevel converter based multi-terminal HVDC schemes

• DOI: 10.1109/pesgm.2015.7286086
• 发表时间: 2015-07
• 期刊: 2015 IEEE Power & Energy Society General Meeting
• 作者: O. Adeuyi;M. Cheah‐Mane;Jun Liang;N. Jenkins;Yanan Wu;Chang Li;Xueguang Wu

Blending HVDC-Link Energy Storage and Offshore Wind Turbine Inertia for Fast Frequency Response

• DOI: 10.1109/tste.2014.2360147
• 发表时间: 2015-07
• 期刊: IEEE Transactions on Sustainable Energy
• 影响因子: 8.8
• 作者: A. Junyent-Ferré;Y. Pipelzadeh;T. Green

Small-Signal Stability Analysis of the Interactions Between Voltage Source Converters and DC Current Flow Controllers

• DOI: 10.1109/oajpe.2019.2930897
• 发表时间: 2020-12
• 期刊: IEEE Open Access Journal of Power and Energy
• 影响因子: 3.8
• 作者: Rui Guan;N. Deng;Ying Xue;Xiao-Ping Zhang

A DC current flow controller for meshed modular multilevel converter multiterminal HVDC grids

• DOI: 10.17775/cseejpes.2015.00006
• 发表时间: 2015-05
• 期刊: CSEE Journal of Power and Energy Systems
• 影响因子: 7.1
• 作者: N. Deng;Puyu Wang;Xiao-Ping Zhang;G. Tang;Junzheng Cao

Small-signal Stability Analysis and Control System Design of a Meshed Multi-terminal High-Voltage Direct Current Grid with a Current Flow Controller

• DOI: 10.1080/15325008.2016.1153750
• 发表时间: 2016-05
• 期刊: Electric Power Components and Systems
• 影响因子: 1.5
• 作者: N. Deng;Puyu Wang;Xiao-Ping Zhang