一、儲能變流器的工作原理

儲能變流器的工作原(yuan)理是交(jiao)、直流(liu)側可控(kong)(kong)的四象限(xian)運(yun)行的變流(liu)裝(zhuang)置，實(shi)現對電(dian)(dian)能的交(jiao)直流(liu)雙(shuang)向轉換。該(gai)原(yuan)理就是通過微網監控(kong)(kong)指令進(jin)行恒功(gong)(gong)率或(huo)恒流(liu)控(kong)(kong)制，給電(dian)(dian)池充電(dian)(dian)或(huo)放(fang)電(dian)(dian)，同時(shi)平滑(hua)風電(dian)(dian)、太陽能等波動性電(dian)(dian)源的輸出。PCS采用雙(shuang)閉環(huan)控(kong)(kong)制和SPWM脈沖(chong)調制方法，能夠精確快速(su)地調節輸出電(dian)(dian)壓、頻率、有功(gong)(gong)和無功(gong)(gong)功(gong)(gong)率。

PCS儲(chu)能(neng)(neng)(neng)(neng)(neng)變流器(qi)可(ke)以通過快速的(de)(de)電(dian)(dian)能(neng)(neng)(neng)(neng)(neng)存儲(chu)來(lai)響應(ying)負荷的(de)(de)波(bo)動(dong)，吸收多(duo)余的(de)(de)能(neng)(neng)(neng)(neng)(neng)量(liang)或補充缺額的(de)(de)能(neng)(neng)(neng)(neng)(neng)量(liang)，實(shi)現大功率(lv)的(de)(de)動(dong)態調(diao)節，很(hen)好地適應(ying)頻(pin)(pin)率(lv)調(diao)節和電(dian)(dian)壓(ya)(ya)功率(lv)因數的(de)(de)校正，從而提高(gao)系統運行的(de)(de)穩(wen)定性。廣泛應(ying)用于電(dian)(dian)力(li)系統、軌道交通、軍(jun)工(gong)、石油機械、新能(neng)(neng)(neng)(neng)(neng)源汽車、風力(li)發電(dian)(dian)、太陽能(neng)(neng)(neng)(neng)(neng)光伏等(deng)領域(yu)，在電(dian)(dian)網(wang)削峰(feng)填谷(gu)、平滑新能(neng)(neng)(neng)(neng)(neng)源波(bo)動(dong)，能(neng)(neng)(neng)(neng)(neng)量(liang)回收利用等(deng)場合實(shi)現能(neng)(neng)(neng)(neng)(neng)量(liang)雙向流動(dong)，對電(dian)(dian)網(wang)電(dian)(dian)壓(ya)(ya)頻(pin)(pin)率(lv)主動(dong)支撐(cheng)，提高(gao)供(gong)電(dian)(dian)電(dian)(dian)能(neng)(neng)(neng)(neng)(neng)質量(liang)。

與常規電源相比(bi)，大規模(mo)儲能(neng)(neng)電站(zhan)能(neng)(neng)夠適應負荷的(de)快(kuai)速(su)變(bian)化(hua)，對提(ti)高電力系統安全(quan)穩定運行(xing)水平(ping)、電網供電質量(liang)和可靠性起到了重(zhong)要作用，同時還(huan)可以優化(hua)電源結構，實現(xian)綠色環保，達到電力系統的(de)總體(ti)節(jie)能(neng)(neng)降耗，提(ti)高總體(ti)的(de)經(jing)濟效(xiao)益。

二、儲能變流器的作用和優勢

1、突破天氣變化的局限性

由于儲(chu)能變流器能夠(gou)將交流電(dian)(dian)轉(zhuan)換(huan)為(wei)直(zhi)(zhi)流電(dian)(dian)儲(chu)存在蓄電(dian)(dian)池內，并在斷(duan)電(dian)(dian)后將蓄電(dian)(dian)池內的直(zhi)(zhi)流電(dian)(dian)轉(zhuan)換(huan)為(wei)交流電(dian)(dian)供(gong)用(yong)戶使用(yong)，這就(jiu)在很大(da)程度上(shang)降低(di)了(le)天氣(qi)狀況對(dui)發(fa)電(dian)(dian)穩(wen)定性(xing)的影響(xiang)，能夠(gou)大(da)大(da)提升電(dian)(dian)網的穩(wen)定性(xing)和品質。

2、擁有更高的用電效率

與(yu)并(bing)網光(guang)伏逆變(bian)(bian)器(qi)(qi)相比，儲能變(bian)(bian)流器(qi)(qi)用(yong)(yong)電(dian)效率更(geng)高，不(bu)(bu)僅能夠突破天氣(qi)狀(zhuang)況、時間等(deng)局(ju)限性，解決并(bing)網光(guang)伏逆變(bian)(bian)器(qi)(qi)存在(zai)(zai)的問題，還能為用(yong)(yong)戶(hu)提供(gong)更(geng)加(jia)穩定、持久的電(dian)能，避免用(yong)(yong)電(dian)系統故障(zhang)帶來(lai)的不(bu)(bu)便和(he)麻(ma)煩，這也是更(geng)多用(yong)(yong)戶(hu)選擇(ze)這種逆變(bian)(bian)器(qi)(qi)的重要原(yuan)因所在(zai)(zai)。

3、擁有較高的穩定性

在電(dian)(dian)網(wang)系(xi)統(tong)故障的(de)(de)情(qing)況(kuang)下，儲(chu)(chu)能(neng)變流(liu)器(qi)能(neng)夠(gou)將儲(chu)(chu)存的(de)(de)直(zhi)流(liu)電(dian)(dian)直(zhi)接轉(zhuan)換為(wei)交(jiao)流(liu)電(dian)(dian)供(gong)(gong)電(dian)(dian)網(wang)系(xi)統(tong)使用(yong)(yong)，受外(wai)界(jie)因素(su)的(de)(de)影響較小，能(neng)夠(gou)大大降低用(yong)(yong)電(dian)(dian)成本，具(ju)有較高的(de)(de)穩(wen)定(ding)性。當處于用(yong)(yong)電(dian)(dian)高峰期時(shi)(shi)，儲(chu)(chu)能(neng)變流(liu)器(qi)會(hui)將太陽能(neng)直(zhi)流(liu)電(dian)(dian)轉(zhuan)換為(wei)交(jiao)流(liu)電(dian)(dian)并入電(dian)(dian)網(wang)供(gong)(gong)廣大用(yong)(yong)戶(hu)使用(yong)(yong)，而處于用(yong)(yong)電(dian)(dian)低谷(gu)期時(shi)(shi)，儲(chu)(chu)能(neng)變流(liu)器(qi)又會(hui)將電(dian)(dian)網(wang)中的(de)(de)交(jiao)流(liu)電(dian)(dian)轉(zhuan)換為(wei)直(zhi)流(liu)電(dian)(dian)儲(chu)(chu)存起來(lai)，能(neng)夠(gou)實現(xian)直(zhi)流(liu)電(dian)(dian)和交(jiao)流(liu)電(dian)(dian)的(de)(de)雙向轉(zhuan)換，而且能(neng)夠(gou)為(wei)斷電(dian)(dian)時(shi)(shi)的(de)(de)用(yong)(yong)電(dian)(dian)提供(gong)(gong)強有力(li)的(de)(de)保障。

除了以上作用外，儲能變流器還具有能夠為電網提供更加穩定、諧波含量較少的純凈電流，這不僅符合當今社會節能減排的趨勢和要求，更加提升了電網的穩定性和品質。總而言之，儲能變流器能夠突破傳統光伏逆變器的局限性，為電網系統提供高品質的電能的同時，還能降低用電成本，提高用電效率，這些優勢和作用也是儲能變流器能(neng)夠在市場上占據一定(ding)優勢的前(qian)提和保障。