Sequence component models to calculate fault current contributions from wind generators

用于计算风力发电机故障电流贡献的序列组件模型

• 批准号: 1028546
• 负责人: Ronald Harley
• 金额: $ 15.32万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-15 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1028546&HistoricalAwards=false
• 关键词: Sequence; component; models; calculate; fault

SEQUENCE COMPONENT MODELS TO CALCULATE FAULT CURRENT CONTRIBUTIONS FROM WIND GENERATORSABSTRACTThe objective of this research is to develop new dynamic sequence component models for doubly-fed induction wind generators in order to calculate the positive, negative and zero sequence currents from such large wind plants to a grid fault. The approach is to simulate these faults in the time domain using accurate machine and power electronic models, and develop their sequence component models in the frequency domain. Protection relays measure the sequence component currents, but until now utility protection engineers have not been able to accurately calculate relay settings at the nodes where wind plants are connected to the utility network. When the wind generator circuit topology changes within the milli-second range, it is necessary to have time varying or dynamic sequence component models based and adapting this information to relay settings will be a fundamentally new area to power engineering. This method could also be applied to other three phase systems and machines, and even lead to completely new relay designs. Reliable and secure electricity is the backbone of society. Incorrect relay settings based on incorrect sequence modeling, can lead to failure to interrupt faults, or to nuisance tripping of the power. Failure to interrupt could in turn lead to personal injury, or severe damage to equipment. The results will be disseminated through publications and various IEEE Working Groups, and included in a graduate level course on electrical machines taught by Dr. Harley. Two undergraduate minority students from the Opportunity Scholars Program (OSP) at Georgia Tech will be involved.

计算风力发电机故障电流贡献的序分量模型摘要本研究的目的是为双馈感应风力发电机开发新的动态序分量模型，以便计算从此类大型风力发电厂到电网故障的正序电流、负序电流和零序电流。该方法是使用精确的机器和电力电子模型在时域中模拟这些故障，并在频域中开发它们的序列分量模型。保护继电器测量序列分量电流，但到目前为止，公用事业保护工程师还无法准确计算风力发电厂连接到公用事业网络的节点处的继电器设置。 当风力发电机电路拓扑在毫秒范围内变化时，需要基于时变或动态序列组件模型，并使这些信息适应继电器设置将是电力工程的一个全新领域。这种方法也可以应用于其他三相系统和机器，甚至带来全新的继电器设计。 可靠、安全的电力是社会的支柱。基于不正确的序列模型的不正确的继电器设置可能会导致无法中断故障或电源的误跳闸。未能中断可能会导致人身伤害或设备严重损坏。研究结果将通过出版物和各个 IEEE 工作组传播，并包含在 Harley 博士教授的电机研究生课程中。佐治亚理工学院机会学者计划 (OSP) 的两名本科少数族裔学生将参与其中。