应用数字信号处理器的基波相位和频率校正检测方法

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1、应用数字信号处理器的基波相位和频率校正检测方法29???f24?M?,?????HVol.29No.242005??12?NPowerSystemTechnologyDec.2005?????c???D1000-3673?N2005?024-0054-05QX???l?????DTM935???E?.???2?DA????Q??2?D470??4017???i?????????V?l???????????G???????u?????Z???????????PMuhammadMansoorKhan

2、?P???C?P?>?>?NQ5??Q??D?C???,?m???1???PQ5???9???~?Y200030?0FundamentalFrequencyandPhaseCorrectingDetectionMethodApplyingDigitalSignalProcessorJIFei-feng?PMuhammadMansoorKhan?PXIEDa?PCHENChen?NDepartmentofElectricalEngineering?PShanghaiJiaotongUn

3、iversity?PXuhuiDistrict?PShanghai200030?PChina?0ABSTRACT?DAnovelfundamentalfrequencyandinitialphasedetectionmethodbasedonDSPisproposed,whichcanbeusedtogetsynchronousfundamentalfrequencyvoltageorcurrentsignalsofpowersystem.AfterA/Dtransformandpassingt

4、hroughthefrequencycorrectionlink,thesignalpossessessameangularfrequencyastheinputsignalAgsfundamentalcomponentisobtained,afterthecorrectedsignalpassedthroughtheinitialphasecorrectionlinkagain,thephasesignalbecomessuchasignal,whichpossessesbothsamefre

5、quencyandinitialphaseasthoseoffundamentalcomponentofinputsignal,sothatthetracingofinputsignalAgsfundamentalcomponentisrealized.InthismethodthefundamentalcomponentAgsfrequencyandinitialphaseofinputsignalandtheerrorsbetweenthemandstandardsignalscanbere

6、spectivelycalculatedwithinasamplingperiodwhiletheclosed-loopfeedbackisnotneeded,thereforethetracingspeedisevidentlyquickened.Becausethestructureoffrequencycorrectionlinksameasthatoftheinitialphasecorrectionlink,theprogrammingissimplified.Simulationan

7、dtestresultsshowthattheproposeddetectionmethodisnotimpactedbyharmonicsandpossesseshighertracingaccuracy;itstransientresponsetimeislessthan20ms.KEYWORDS?DFrequency?-Phase?-Synchronoussignal?-DSP?-Fundamentalfrequencycomposition?-Powersystem?????D????Q

8、?Q?????Q??????????V?l???????????G???????u?????Z?????P???iQ??,??????QX?,???c?,?L?????l???P????????????U9???????????u/???NA/D?0?????e?D???????u???????????UQe?????????????l?????P?????????????P???????????6???u???????e?v?????UQe?????????????l???P?????P?6?