简介:在分析Nuttall窗、Kaiser窗频谱特性的基础上,研究了加Nuttall-Kaiser组合窗三峰插值快速傅立叶变换(FFT)谐波分析算法。通过对Nuttall窗和Kaiser窗赋以一定的权重系数来构造组合窗的频谱函数,结合三峰插值法,进行多项式拟合逼近,由此推导出含有谐波分量的信号的各个参数计算公式。通过仿真验证了该组合窗三峰插值FFT算法有很强的频谱泄漏抑制能力和很小的幅值相位相对误差,极大提高了参数的计算精度。并将该算法应用到电能质量监测装置上,通过对比实验,验证了算法的可行性与实用性。
简介:<正>NatureandaimoftheGroupGorporationChinaHydropowerEngineeringConsultingGroupCorporationsetupattheendof2002withtheapprovaloftheStateCouncilhadrestructuredsevenresearchinstitutesofinvestigationanddesign(Beijing,EastChina,Northwest,Mid-south,Chengdu,Guiyang,Kunminginstitutes)andChinaWaterResourcesandHydropowerConstructionEngi-
简介:<正>ChinaPowerEngineeringConsultingGroupCorporationestablishedonthefoundationofChinaPowerEngineering(Group)CompanyLtd.affiliateseightsolely-ownedemterprisesandcompaniesandaninstitution,theyare:Northeast,EastChina,Central-South.NorthwestandSouthwestpowerdesigninstitutes,EngineeringCompanyLtd.underGuohuaNorthChinaPowerDesignIn-stitute,ChinaPowerConstructionConsultationCorporation,ChinaPowerEngineeringConsultation(Group)CompanyLtd,andthePowerPlanningandDesignGeneralInstitute.