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【24h】Optimized Power Redistribution of Offshore Wind Farms Integrated VSC-MTDC Transmissions After Onshore Converter Outage

机译陆上换流器中断后,优化了海上风电场集成VSC-MTDC输电的功率重新分配

【摘要】The increasing penetration of renewable sources, particularly wind energy, has provided the power system with large-scale clean electricity. For integrating gigawatt offshore wind energy, voltage source converter (VSC) based multiterminal HVDC transmission is the prospective technology with flexible control characteristics. Most of the papers so far have dealt with improving the frequency performance caused by an ac system disturbance, and only a few deals with the influence of dc system converter outage on frequency performance. However, the converter outage will bring successive power impulses to the onshore ac grids. This paper presents an optimized power redistribution method to enhance the frequency performance of onshore ac grids. The two scenarios of power redistribution after converter outage are analyzed: self-distributed type and nonself-distributed type. For the self-distributed scenario, the optimized power redistribution method involves three steps: sensitive cluster identification, optimized power redistribution calculation, and dc grid operating point setting. For the nonself-distributed scenario, a combined offshore wind farm control strategy with emulating inertia control and auxiliary pitch angle control is proposed to alleviate the adverse effect of the transferred surplus power on asynchronous grids. Simulation verifications are carried out in a modified New England 39-bus system with seven terminal VSC-HVDC transmission system.

【摘要机译】可再生能源,尤其是风能的普及率不断提高,为电力系统提供了大规模的清洁电力。为了集成千兆瓦海上风能,基于电压源转换器(VSC)的多端子HVDC输电是具有灵活控制特性的前瞻性技术。迄今为止,大多数论文都致力于改善由交流系统扰动引起的频率性能,而只有少数几篇涉及直流系统转换器中断对频率性能的影响。但是,换流器故障将给陆上交流电网带来连续的功率脉冲。本文提出了一种优化的功率重新分配方法,以增强陆上交流电网的频率性能。分析了变流器停电后功率重新分配的两种情况:自分布型和非自分布型。对于自分配方案,优化的电源重新分配方法包括三个步骤:敏感集群识别,优化的电源重新分配计算和直流电网工作点设置。针对非自给自足的情况,提出了一种结合惯性控制和辅助俯仰角控制的海上风电场联合控制策略,以减轻转移的剩余电力对异步电网的不利影响。仿真验证是在带有七个终端VSC-HVDC传输系统的经过改进的New England 39总线系统中进行的。

【作者】Huanfeng Dong;Zheng Xu;Pengcheng Song;Geng Tang;Qian Xu;Liying Sun;

【作者单位】Department of Electrical Engineering, Zhejiang University, Hangzhou, China; Department of Electrical Engineering, Zhejiang University, Hangzhou, China; Department of Electrical Engineering, Zhejiang University, Hangzhou, China; Department of Electrical Engineering, Zhejiang University, Hangzhou, China; Economic Research Institute, State Grid Zhejiang Electric Power Company, Hangzhou, China; Economic Research Institute, State Grid Zhejiang Electric Power Company, Hangzhou, China;

【年(卷),期】2017(64),11

【年度】2017

【页码】8948-8958

【总页数】11

【原文格式】PDF

【正文语种】eng

【中图分类】;

【关键词】Wind farms;Power conversion;Frequency conversion;Wind energy;Voltage control;Frequency control;

机译 风电场;功率转换;频率转换;风能;电压控制;频率控制;
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