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***2拉普拉斯變換 ?+1PiPiKsT? ()iFs?()PiGs ()LiPS? ()TiPS?()tiPS?+North China Electric Power University 18/32 2022/5/26 單區(qū)域閉環(huán)調(diào)節(jié)系統(tǒng) ?+1PiPiKsT? ()iFs? ()PiGs ()LiPS? ()TiPS? ()tiPS?+—1(1 ) (1 )nTs T s T??1R ()nTGs()Fs?+()TPs?()cPs? ? ?1/ R ()nTGs ()PGs1(1 ) (1 )nTs T s T?? ( 1 )PPKsT?()LPs?()Fs?()CPs?++ ()TPs?North China Electric Power University 19/32 2022/5/26 多區(qū)域閉環(huán)調(diào)節(jié)系統(tǒng) ?—1(1 ) (1 )nTs T s T??1R ()nTGs()Fs?+()TPs?()cPs?+ ?+??++++()iFs?()jFs? ()kFs?()vFs?2 ijT?2 ikT?2ivT?1/ s ()tiPs?? ?? ???1(1 ) (1 )n i T is T s T??+1/ R()ciPs?()nTiGs()TiPs?1()LPs?1PiPiKsT?+++()TiPs?()iFs?()iFs? ()kFs? ()vFs?2ijT?2ikT?2ivT?()iFs?1/ s+North China Electric Power University 20/32 2022/5/26 二、電網(wǎng)的頻率調(diào)節(jié)特性 單區(qū)域系統(tǒng)的頻率調(diào)節(jié)特性 ? ?1/ R ()nTGs ()PGs1(1 ) (1 )nTs T s T?? ( 1 )PPKsT?()LPs?()Fs?()CPs?++ ()TPs?多區(qū)域系統(tǒng)的頻率調(diào)節(jié)特性 North China Electric Power University 21/32 2022/5/26 二、電網(wǎng)的頻率調(diào)節(jié)特性 多區(qū)域系統(tǒng)的頻率調(diào)節(jié)特性 ? ?? ? ??1(1 ) (1 )n i T is T s T??+1/ R()ciPs?()nTiGs()TiPs?1()LPs?1PiPiKsT?+++()TiPs?()iFs?()iFs? ()kFs? ()vFs?2ijT?2ikT?2ivT?()iFs?1/ s+North China Electric Power University 22/32 2022/5/26 ? ?1/ R ()nTGs ()PGs1(1 ) (1 )nTs T s T?? ( 1 )PPKsT?()LPs?()Fs?()CPs?++ ()TPs?單區(qū)域電網(wǎng)的頻率特性 在不考慮外加控制功率的前提下,研究單區(qū)域電網(wǎng)的頻率特性 0?? cP? ? ? ?? ? ? ?? ?sPsGsGRsGsF LnTPP ??????11North China Electric Power University 23/32 2022/5/26 單區(qū)域電網(wǎng)的頻率特性 ? ? ? ?? ? ? ?? ?sPsGsGRsGsFLnTPP ?????? 11施加一個(gè)階躍變化 LP?? ? ? ?? ? ? ? sPsGsGRsGsF LnTPP ?????? 11? ?? ??LLLLPPsPRKPPKRKsFsf ??????????????? 11l i m0稱為系統(tǒng)功率頻率特性系數(shù)或者稱為系統(tǒng)的單位調(diào)節(jié)功率,它標(biāo)志了系統(tǒng)負(fù)荷增加或者減少時(shí),在原動(dòng)機(jī)調(diào)速器調(diào)節(jié)特性和負(fù)荷調(diào)節(jié)效應(yīng)共同作用下,系統(tǒng)頻率下降或上升的數(shù)值。 sys2=