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电力操纵电源体系在古代动力体系中据有首要的位置,首要用于发电厂、变电站中,作为直流机构、继电掩护(hu)、旌旗灯号、主动节制、变乱照明、仪器仪表(biao)和应急变乱负荷等的首要电源。其机能和品质间接干系到电网的宁静运转和装备的宁静。

本文经由过程对经常利用的均流方式的阐发和两种主动选主的均流方式的小旌旗灯号模子的建模阐发,挑选了主动选主的主从均流方式。接纳该均流方式可完成模块电源间的均流,进步均流环的呼应速率,完成模块电源并接洽统的冗余。利用均流集成节制芯片UC3902完成静态均流,并设想了基于主动选主的主从均流的节制电路,完成了体系的均流节制。

2 均流节制的根基道理

为(wei)了能使各(ge)(ge)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)源均(jun)(jun)分(fen)(fen)负载电(dian)(dian)(dian)(dian)(dian)(dian)(dian)流,起首须要深(shen)切(qie)阐发电(dian)(dian)(dian)(dian)(dian)(dian)(dian)源电(dian)(dian)(dian)(dian)(dian)(dian)(dian)流分(fen)(fen)派不(bu)(bu)均(jun)(jun)的(de)机(ji)理,而(er)后接(jie)纳响应的(de)对策。多个(ge)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)源并联后的(de)环(huan)境(jing)如图1所示(shi)。一切(qie)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)源输(shu)入毗(pi)连在一路,是(shi)以它们的(de)输(shu)入电(dian)(dian)(dian)(dian)(dian)(dian)(dian)压都是(shi)不(bu)(bu)异(yi)(yi)的(de),但每一个(ge)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)源的(de)给定量、反应比例系数略有差别,再(zai)斟(zhen)酌到运(yun)放(fang)的(de)平衡电(dian)(dian)(dian)(dian)(dian)(dian)(dian)压也各(ge)(ge)不(bu)(bu)不(bu)(bu)异(yi)(yi),是(shi)以各(ge)(ge)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)源偏差旌(jing)旗灯号(hao)也各(ge)(ge)不(bu)(bu)不(bu)(bu)异(yi)(yi)(下角标k均(jun)(jun)表现第k个(ge)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)源)。各(ge)(ge)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)源的(de)电(dian)(dian)(dian)(dian)(dian)(dian)(dian)压调理器凡是(shi)都接(jie)纳比例-积(ji)分(fen)(fen)(PI)调理器。

当各电(dian)(dian)源的输入刚(gang)并联到一路(lu)时,有的电(dian)(dian)源偏差信为(wei)正(zheng),电(dian)(dian)压(ya)调(diao)理器(qi)正(zheng)向积(ji)分,开路(lu)电(dian)(dian)压(ya)进步,输入电(dian)(dian)流增(zeng)添;有的电(dian)(dian)源为(wei)负,电(dian)(dian)压(ya)调(diao)理器(qi)反(fan)向积(ji)分,开路(lu)电(dian)(dian)压(ya)下(xia)降,输入电(dian)(dian)流变小。

当负载电(dian)流小于单台(tai)电(dian)源(yuan)的(de)(de)最大限流值时,终究进入(ru)稳态(tai)后的(de)(de)环境是,有(you)一台(tai)电(dian)源(yuan)的(de)(de)为零,调(diao)理器(qi)一般任务,而(er)别的(de)(de)电(dian)源(yuan)的(de)(de)为负值,调(diao)理器(qi)处于上限饱和状(zhuang)况。全数(shu)的(de)(de)负载电(dian)流都由为零的(de)(de)点源(yuan)承(cheng)当,别的(de)(de)电(dian)源(yuan)输入(ru)电(dian)流为零。

 

图1并联后的电源体系

 

当负载(zai)(zai)电(dian)(dian)(dian)(dian)流(liu)(liu)较大(da),跨越了(le)单台(tai)电(dian)(dian)(dian)(dian)源(yuan)的(de)最(zui)大(da)限流(liu)(liu)值,环境就略微庞杂(za)一(yi)(yi)些。有(you)些电(dian)(dian)(dian)(dian)源(yuan)的(de)为(wei)正,有(you)些电(dian)(dian)(dian)(dian)源(yuan) 为(wei)负,最(zui)多有(you)一(yi)(yi)个电(dian)(dian)(dian)(dian)源(yuan)为(wei)零。 为(wei)正的(de)电(dian)(dian)(dian)(dian)源(yuan)输入电(dian)(dian)(dian)(dian)流(liu)(liu)为(wei)最(zui)大(da)限流(liu)(liu)值, 为(wei)负的(de)电(dian)(dian)(dian)(dian)源(yuan)输入电(dian)(dian)(dian)(dian)流(liu)(liu)为(wei)零, 为(wei)零的(de)电(dian)(dian)(dian)(dian)源(yuan)输入电(dian)(dian)(dian)(dian)流(liu)(liu)介于零和(he)限流(liu)(liu)值之间。一(yi)(yi)切的(de)电(dian)(dian)(dian)(dian)源(yuan)的(de)输入电(dian)(dian)(dian)(dian)流(liu)(liu)和(he)即是负载(zai)(zai)电(dian)(dian)(dian)(dian)流(liu)(liu)。

按照以(yi)上的(de)(de)(de)(de)阐发,电(dian)(dian)源并联后输(shu)入(ru)电(dian)(dian)流(liu)不(bu)相称的(de)(de)(de)(de)缘由是,在输(shu)入(ru)电(dian)(dian)压(ya)(ya)(ya)不(bu)异的(de)(de)(de)(de)前提(ti)下(xia),电(dian)(dian)压(ya)(ya)(ya)调(diao)理(li)器(qi)偏(pian)差旌旗灯号(hao)(hao)差别(bie),这反应(ying)了电(dian)(dian)路(lu)参(can)数(shu)的(de)(de)(de)(de)分离性(xing)。为(wei)了可以(yi)或(huo)许(xu)弥补这类分离性(xing),使(shi)各电(dian)(dian)源的(de)(de)(de)(de)输(shu)入(ru)电(dian)(dian)流(liu)相称,并且都即是零(ling),必须接纳节(jie)制(zhi)办法。是以(yi),并联运转(zhuan)均(jun)流(liu)节(jie)制(zhi)的(de)(de)(de)(de)根基道理(li)便是经由过程检测(ce)模块的(de)(de)(de)(de)输(shu)入(ru)电(dian)(dian)流(liu),判(pan)定(ding)它的(de)(de)(de)(de)不(bu)均(jun)流(liu)水平(ping),用(yong)这个旌旗灯号(hao)(hao)去转(zhuan)变(bian)直(zhi)流(liu)输(shu)入(ru)电(dian)(dian)压(ya)(ya)(ya)的(de)(de)(de)(de)给(ji)定(ding)或(huo)反应(ying)的(de)(de)(de)(de)量(liang),使(shi)电(dian)(dian)压(ya)(ya)(ya)调(diao)理(li)器(qi)偏(pian)差旌旗灯号(hao)(hao)为(wei)零(ling)和各模块电(dian)(dian)源电(dian)(dian)压(ya)(ya)(ya)调(diao)理(li)器(qi)输(shu)入(ru)的(de)(de)(de)(de)电(dian)(dian)流(liu)给(ji)定(ding)不(bu)异,以(yi)到(dao)达节(jie)制(zhi)均(jun)流(liu)的(de)(de)(de)(de)目标。

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