TI公司为了提高数字电源的开发效率,专门开发了针对C2000系列处理器的软件频率响应分析器(Software Frequency Response Analyzer,SFRA)工具,用于测试数字电源的频率特性。文中在分析SFRA原理的基础上,结合交流伺服系统的应用需求,将SFR...TI公司为了提高数字电源的开发效率,专门开发了针对C2000系列处理器的软件频率响应分析器(Software Frequency Response Analyzer,SFRA)工具,用于测试数字电源的频率特性。文中在分析SFRA原理的基础上,结合交流伺服系统的应用需求,将SFRA应用于交流伺服系统的频率特性测试。实验结果表明,SFRA方法同样可用于交流伺服系统中,一方面节省了系统的成本,另一方面拓展了该方法的应用场景,具备积极的研究价值。展开更多
针对在分析热应力和电应力对并网逆变器的稳定性影响时,逆变器在线频率特性难以实时获取的问题,提出了一种实时分析并网逆变器频域特性的方法。该方法基于软件频率响应分析(Software Frequency Response Analyzer,SFRA)技术,向系统直流...针对在分析热应力和电应力对并网逆变器的稳定性影响时,逆变器在线频率特性难以实时获取的问题,提出了一种实时分析并网逆变器频域特性的方法。该方法基于软件频率响应分析(Software Frequency Response Analyzer,SFRA)技术,向系统直流给定点处注入扫频信号,同时检测该注入信号下的系统输出,并分别对注入信号和系统输出进行离散傅里叶变换后,由上位机绘制系统频率特性曲线。所提方法在DSP中实现,不额外增加硬件成本。实验结果表明,所提方法可有效获取并网逆变器的在线频率特性曲线,在逆变器控制器设计以及分析系统稳定性领域具有一定的工程应用价值。展开更多
With the prevailing power scenario, every watt-second of electrical energy has its own merit in satisfying the consumer demand. At the state of such a stringent energy demanding era, failure of a power generation equi...With the prevailing power scenario, every watt-second of electrical energy has its own merit in satisfying the consumer demand. At the state of such a stringent energy demanding era, failure of a power generation equipment compounds the energy constraints which will not only result in a huge loss of generation but also have an impact on capital revenue. The unexpected failure of generator step-up （GSU） transformer is espe- cially a major disturbance in the power system operation and leads to unscheduled outages with power delivery problems. The time lag in bringing back the equipment in service after rectification or replacement may increase the criticality as the process involves mobilization of spares and maintenance professionals. Hot atmosphere existing in the vicinity of thermal power stations running round-the- clock with more than 100% plant load factor （PLF） increases the thermal stress of the electrical insulation which leads to premature failure of windings, bushings, core laminations, etc. The healthy state of the GSU transformer has to be ensured to minimize the loss of power generation. As the predication related to failure of a GSU transformer is associated with some uncertainties, a fuzzy approach is employed in this paper along with actual field data and case studies for the well-being analysis of GSU transformer.展开更多
文摘TI公司为了提高数字电源的开发效率,专门开发了针对C2000系列处理器的软件频率响应分析器(Software Frequency Response Analyzer,SFRA)工具,用于测试数字电源的频率特性。文中在分析SFRA原理的基础上,结合交流伺服系统的应用需求,将SFRA应用于交流伺服系统的频率特性测试。实验结果表明,SFRA方法同样可用于交流伺服系统中,一方面节省了系统的成本,另一方面拓展了该方法的应用场景,具备积极的研究价值。
文摘针对在分析热应力和电应力对并网逆变器的稳定性影响时,逆变器在线频率特性难以实时获取的问题,提出了一种实时分析并网逆变器频域特性的方法。该方法基于软件频率响应分析(Software Frequency Response Analyzer,SFRA)技术,向系统直流给定点处注入扫频信号,同时检测该注入信号下的系统输出,并分别对注入信号和系统输出进行离散傅里叶变换后,由上位机绘制系统频率特性曲线。所提方法在DSP中实现,不额外增加硬件成本。实验结果表明,所提方法可有效获取并网逆变器的在线频率特性曲线,在逆变器控制器设计以及分析系统稳定性领域具有一定的工程应用价值。
文摘With the prevailing power scenario, every watt-second of electrical energy has its own merit in satisfying the consumer demand. At the state of such a stringent energy demanding era, failure of a power generation equipment compounds the energy constraints which will not only result in a huge loss of generation but also have an impact on capital revenue. The unexpected failure of generator step-up （GSU） transformer is espe- cially a major disturbance in the power system operation and leads to unscheduled outages with power delivery problems. The time lag in bringing back the equipment in service after rectification or replacement may increase the criticality as the process involves mobilization of spares and maintenance professionals. Hot atmosphere existing in the vicinity of thermal power stations running round-the- clock with more than 100% plant load factor （PLF） increases the thermal stress of the electrical insulation which leads to premature failure of windings, bushings, core laminations, etc. The healthy state of the GSU transformer has to be ensured to minimize the loss of power generation. As the predication related to failure of a GSU transformer is associated with some uncertainties, a fuzzy approach is employed in this paper along with actual field data and case studies for the well-being analysis of GSU transformer.
