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双PWM全功率变流器机侧控制策略研究
作者:王林夏婷赵青王银杰来源:《能源研究与信息》2017年第04期
摘要:双脉宽调制(PWM)全功率变流器机侧的开关频率低,其电流谐波含量高,且同步电机反电动势中产生了大量谐波为了降低发电机的铜铁损耗,降低系统成本,弱化网侧滤波器设计的难度,抑制机侧谐波具有重要意义传统比例积分(PI)调节器难以抑制直驱永磁同步发电系统机侧谐波,针对这一现象,提出将PI与准比例谐振(PR)调节器联合,形成新型的调节器,并在转子定向的旋转坐标系下对定子电流特定次谐波进行了抑制运用PSCADEMTDC软件进行了仿真验证,结果表明:采用经典PI控制时,机侧电流谐波含量为1728;采用新型调节器时,机侧电流谐波含量为586同时,通过分析实验结果验证了该机侧控制策略的可行性,可有效地抑制机侧谐波关键词:PI调节器;直驱永磁同步发电机;机侧谐波;准PR调节器;PSCADEMTDC软件中图分类号:TM393文献标志码:AStudyo
theMotorsideCo
trolStrategyofDualPWMFullPowerCo
verterAbstract:Theswitchi
gfreque
cyofdualpulsewidthmodulatio
(PWM)co
verterwithfullpoweri
motorsidewaslowItscurre
tharmo
icco
te
twashighFurthermore,alarge
umberofharmo
icswerege
eratedi
thebackEMFofsy
chro
ousmotorItwasveryimporta
ttorestrai
theharmo
icsofthemotorsidetoreducethecopperloss,theiro
loss,thesystemcosta
dthedifficultyofthefilterdesig
ofthe
etworksideItwasdifficultforthetraditio
alPIco
trollertorestrai
theharmo
icsofdirectdrive
wi
dturbi
ewithperma
e
tmag
etsy
chro
ousge
erator(DPMSG)Therefore,a
ewco
trolstrategyofthemotorsideco
verterwasproposedbasedo
thecombi
atio
ofproportio
ali
tegral(PI)regulatora
dquasiproportio
alreso
a
t(PR)regulatortosuppressthespecificharmo
icofstatorcurre
ti
therotororie
tedrotati
gcoordi
ateThesimulatio
wasco
ductedwiththesoftwarePSCADEMTDCThecurre
tharmo
icco
te
tofthemotorsidewas1728withtraditio
alPIco
troller,whileitwas586withtheproposedco
trollerThefeasibilityofthemotorsideco
trolstrategywasvalidatedbytheexperime
talresultsKeywords:PIco
troller;DPMSG;harmo
iccurre
tofmotorside;PRco
troller;thesoftwarePSCADEMTDC
f龙源期刊网httpwwwqika
comc
在双脉宽调制(PWM)全功率变流的直驱风永磁发电系统中,机侧整流装置是最大谐波的产生源,形成谐波污染机侧PWM变流器开关频率低,其电流谐波含量高,且同步电机反电动势中产生了大量谐波发电机组并入电网后,将对电网造成谐波污染大量谐波也会增加发r