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                1. 高低壓開關柜/電容補償柜/啟動柜成套電氣設備生產商-襄陽赫特電氣制造有限公司歡迎您!

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                  Hl2000勵磁控制柜

                  文章來源:赫特電氣時間:2019-07-08 點擊數:

                  Hl2000勵磁控制柜

                  概    述

                    我公司開發的新一代網絡化微機勵磁系統裝置H2000-F是以MCUDSP為內核構成的系統芯片為核心,配以超大規模現場可編程芯片而構成的新型勵磁調節器。它不僅具有早期的微機型勵磁調節器的全部調節、控制、限制、保護和容錯等功能,而且在運算速度、硬件集成度、抗電磁干擾以及可靠性等方面有了極大的進步。該系統中,調節算法、勵磁控制和限制保護等功能由嵌入式、模塊化軟件實現,交流信號、直流信號等經高速AD采樣并經DSP計算實現采集,另外該系統能根據不同的應用對象,通過對采用的可編程芯片進行現場編程和配置,滿足不同的系統配置的需要,具有極大的靈活性和適應性。

                   

                  使用環境

                  ★海拔不超過1000米;對超過1000米的,應按有關標準采取相應措施;

                  ★本裝置用于戶內,環境空氣溫度為-5°C+40°C

                  ★空氣相對濕度:使用地點最濕月的月平均最高相對濕度為90%

                  ★使用環境干凈,無爆炸危險,并且周圍空氣中無腐蝕金屬和破壞絕緣的氣體及導電塵埃。

                   

                  技術指標功能

                  ★調壓精度:≤0.5%。 

                  ★調壓范圍:5%~ 130%。 

                  ★調差范圍:軟件無功調差調節,可任意設置調差大小和正、負方向,級差1%。 

                  ★調節頻率:不低于300/秒。 

                  ★晶閘管控制角α的分辨率:0.0048/位碼。 

                  ★移相范圍:10150度,上下限制可設定。 

                  ★開關量I/O24路開關量光電隔離輸入,24路開關量輸出,其中4路采用光電隔離輸出,20路繼電器輸出。 

                  4~20mA輸出:24~20mA輸出(隔離),分辨率16位。 

                  ★觸發脈沖:可供三相全控整流橋用的六相雙脈沖,脈沖寬度100uS,可同時觸發5組以上并聯運行的三相全控橋。 

                  ★階躍特性:在空載額定電壓情況下,當發電機給定階躍為±10%時,發電機電壓超調量小于階躍量的20%,振蕩次數小于2次,調節時間小于5秒。 

                  ★當發電機零起升壓時,機端電壓超調量不超過額定電壓的10%,振蕩次數小于2次,調節時間小于5秒。 

                  ★勵磁系統按國際嚴酷等級為3級電磁干擾試驗標準,在受到上述級別的干擾時不應發生誤調、失調、誤動、拒動

                   

                  訂貨須知

                  ★產品名稱、型號規格及數量;

                  ★發電機的起勵方式,是否并網;

                  ★配套同步發電機的勵磁參數:額定勵磁電壓、額定勵磁電流、轉子冷態電阻等;

                  ★若用戶有特殊規格和要求,請在訂貨時向我公司提出;

                   

                   

                  后編:

                   

                   

                  勵磁柜

                   

                   一.HI2000 具有以下特點: 1.轉子勵磁采用三相全控整流固接勵磁線路; 2.與同步電動機定子回路沒有直接的電氣聯系; 3.實現了按同步電動機轉子滑差,順極性自動投勵。按到達亞同步轉速(95%)時投入勵磁,使同步電動機拖入同步運行; 4.具有電壓負反饋自動保持恒定勵磁; 5.起動與停車時自動滅磁,并在同步電動機異步運行時具有滅磁保護; 6.可以手動調節勵磁電流,電壓進行功率因數調整,整流電壓可以從額定值的10%至125%連續調節; 7.交流輸入電源與同步電動機定子回路來自同一段母線; 8.同步電動機正常停車5 秒鐘之內,本設備整流電路和觸發電路的同步電源不容許斷電; 9.滅磁電阻RFD1 和RFD2 的阻值為所配的轉子勵磁繞組直流電阻的5 倍,其長期容許電流為同步電動機額定勵磁電流的15%; 10.當同步機矢步運行時,可以發出矢步信號,用于報警或跳閘; 11.輸入電源為380V. 

                   

                  二.保護電路: (1).過壓保護: 1.同步電動機異步運行時,轉子感應過電壓由滅磁環節將放電電阻RFD1-2 接入,消除開路過電壓。 2.主電路可控硅元件的換向過電壓由并接于元件兩端的阻容電路吸收。3.整流變壓器一次側分,合閘引起的操作過電壓由RC1-3 組成的阻容吸收裝置來抑制。 4.為使同相兩橋臂上可控硅元件合理的分擔自直流側的過電壓,設置了R10-15 均壓電阻來保護。 (2)過電流保護: 1.與可控硅串聯的快速熔斷器是作為直流側短路保護用,快熔熔斷時,保護環節可發出聲響報警信號,跳開同步電動機定子側電源開關,切斷勵磁。 2.短路電流發生在整流變壓器二次側時,其一次側空氣開關脫扣器順動,切斷電源。 3.直流側過負荷時,空氣開關脫扣器或熱繼電器動作。但整定值應保證強勵磁30 秒內不動作。

                   

                   三. 勵磁線路各環節的工作電壓均由同步電源變壓器供給,其工作原理如下: 同步電動機起動過程中,滅磁環節工作,使轉子感應交變電流兩半波都通過放電電阻,保證電機的正常起動。起動過程中,整流電路可控硅處于阻斷狀態,當電機起動到亞同步速時,投勵環節自動發出投勵脈沖,使移相給定電壓加到觸發環節,觸發回路發出脈沖到主回路可控硅上,于是投入勵磁,同步電動機拖入同步運行。 電壓負反饋環節將設備電源側引入的電壓信號反極性與給定信號綜合,保證電網電壓波動時,整流輸出勵磁電流保持不變,以實現對電動機的恒定勵磁。 逆變環節的作用是當對家正常停車時,向觸發環節加入一控制信號,使主回路可控硅從整流狀態立即轉入逆變狀態,以保證電機轉子的順利滅磁。

                   

                  四.勵磁繞組: 同步電動機的勵磁繞組是一個大電感加電阻的負載,當整流電壓脈動時轉子電感通過三相全控橋。整流橋可控硅1-6KP(導通工作的那兩個可控硅)及整流變壓器二次側繞組放電,這樣就產生了連續的勵磁電流。 

                   

                  五.滅磁線的工作原理: 同步電動機起動結束,投入同步運行,如果滅磁可控硅沒有關斷,這時三相全控橋交流測電源出現A 相為正,B 或C 相為負時,那么放電電阻FRD1 和可控硅7KP 被熄滅線短接,可控硅7KP 沒有電流通過就自動關閉。 等到三相全控整流橋交流測電源換相,即A 相交流電源由這正到負,流經可控硅8KP 和放電電阻 FRD2 的電流也由正到負,當電流減小到可控硅 8KP 的維持電流以下時的瞬間,可控硅 8KP 沒有電流也自動關閉。 這樣就保證了在投勵后同步電動機拖入同步運行的一個周波內,滅磁可控硅能準確的自動關閉。之后,雖然三相全控整流橋整流電壓分別加在滅磁可控硅7·8KP 上,但電位器所分到的電壓不足以使可控硅7·8KP 觸發導通,所以放電電阻RFD1 和RFD2 被切除。

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