R88M-WP75030T-BWS1新能源發(fā)電單元的頻繁啟動會使配電線路的負荷潮流變化大,從而加大了電壓調(diào)整的難度。由于發(fā)電設(shè)備采用大量的電力電子裝置,電壓的調(diào)節(jié)和的控制方式也與傳統(tǒng)電網(wǎng)方式有很大不同。雖然一般新能源的發(fā)電裝置上裝有逆功率繼電器,正常運行時不會向電網(wǎng)注入功率,但當(dāng)配電系統(tǒng)發(fā)生故障時,短路瞬間會有電流注入電網(wǎng),增加配電網(wǎng)開關(guān)電流,可能使配電網(wǎng)的開關(guān)短路電流超標,影響電網(wǎng)安全運行。
。2)對網(wǎng)損的影響。
新能源接入配電網(wǎng)后,配電系統(tǒng)將由原有的單電源輻射式網(wǎng)絡(luò)變?yōu)橛脩艋ヂ?lián)和多電弱環(huán)網(wǎng)絡(luò)。電網(wǎng)的分布形式將發(fā)生根本性的變化,負荷大小和方向都很難預(yù)測。這使得網(wǎng)損不但與負載等因素有關(guān),還與系統(tǒng)連接的電源具體位置和容量大小密切相關(guān)。
。3)對配電網(wǎng)系統(tǒng)的實時監(jiān)控的影響。
R88M-WP75030T-BWS1現(xiàn)行的配電網(wǎng)是一個無源的放射形電網(wǎng),信息采集、開關(guān)的操作、能源的調(diào)度等相應(yīng)比較簡單,其實施監(jiān)測、控制和高度是由供電部門統(tǒng)一來執(zhí)行的。新能源的接入使此過程復(fù)雜化,特別需要對新能源接入后可能出現(xiàn)的“孤島”現(xiàn)象進行監(jiān)測預(yù)防。當(dāng)新能源的本電網(wǎng)與主配電網(wǎng)分離后,仍繼續(xù)向所在的獨立配電網(wǎng)輸電,就會形成“孤島”現(xiàn)象。孤島中的電壓和頻率不受電網(wǎng)控制,如果電壓和頻率超出允許的范圍,可能會對用戶設(shè)備造成損壞;如果負載容量大于孤島中逆變器容量,會使逆變器過載,可能會燒毀逆變器。同時,會對檢修人員造成危險;如果對孤島進行重合閘操作,會導(dǎo)致該線路再次跳閘,而且負荷可能出現(xiàn)供需不平衡,將嚴重損害電能質(zhì)量,從而降低配電網(wǎng)的供電可靠性。
。4)對配電網(wǎng)規(guī)劃的影響。
R88M-WP75030T-BWS1該板塊個股在接下來的分析中會提到,就不重復(fù)說明了。
2.發(fā)電類
發(fā)電能源
各類一次能源在可獲得性、成本、污染等方面具有不同的優(yōu)缺點。
全球裝機結(jié)構(gòu)
全球裝機結(jié)構(gòu)
雖然近年來太陽能、風(fēng)能等新能源發(fā)電設(shè)備裝機容量快速增長。但不管是全球還是中國,裝機容量仍然是以火電和水電為主,這些供應(yīng)商也同時提供了絕大部分的核電發(fā)電設(shè)備。
風(fēng)電
總裝機容量
中國主要運營商
但我國風(fēng)電目前有棄風(fēng)限電問題主要原因還是電網(wǎng)基礎(chǔ)設(shè)施同風(fēng)電站布局不匹配,電站所在地區(qū)無電力外送能力,所以上述配電網(wǎng)投資極有價值。
并網(wǎng)和棄電問題的改善,將是我國風(fēng)電投資轉(zhuǎn)暖的重要因素。如對這感興趣請積極關(guān)注政策動態(tài)和行業(yè)動態(tài)。
風(fēng)電總裝機
太陽能發(fā)電
太陽能發(fā)電
主要關(guān)注光伏發(fā)電
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R88M-WP75030T-BWS1
R88M-WP75030T-S1
R88M-WP75030T-W
R88M-WP75030T-WS1
R88S-H205G POWER UNIT
R88S-H306G POWER UNIT
R88S-H310G POWER UNIT
C200H-OD215 7
C200H-OD217 4
C200H-ID501 2
C200H-RM001-PV1 1
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POWER SUPPLY UNIT ( 電源供應(yīng)器 ) F300-P 2
印刷電路板 3G8B2-NI020 4
印刷電路板 3G8B2-BI010 2
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SYSMAC PROGRAMMABLE CONTROLLER ( 數(shù)位輸出模組 ) C200H-OD215 1
SYSMAC PROGRAMMABLE CONTROLLER ( 數(shù)位輸出模組 ) C200H-OD217 1
SYSMAC PROGRAMMABLE CONTROLLER ( 數(shù)位輸出模組 ) C200H-OD501 1
SYSMAC PROGRAMMABLE CONTROLLER ( 數(shù)位輸入模組 ) C200H-ID215 4
SYSMAC PROGRAMMABLE CONTROLLER ( 數(shù)位傳送模組 ) C200H-RM001-PV1 1
CONNECTION DIAGRAM OUTPUT UNIT( 連接圖示輸出單元 ) C500-OC224 9
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