變頻調(diào)速技術(shù)是目前世界公認(rèn)的電機(jī)節(jié)電技術(shù)之一，具有調(diào)速范圍寬、調(diào)速精度高、動態(tài)響應(yīng)快、運(yùn)行效率高、系統(tǒng)功率因數(shù)高、操作方便等一系列優(yōu)點(diǎn)，也成為當(dāng)今改造傳統(tǒng)工業(yè)、改善工藝流程、提高生產(chǎn)過程自動化水平、提高產(chǎn)品質(zhì)量、推動技術(shù)進(jìn)步的主要手段之一。在石油行業(yè)中，變頻器廣泛應(yīng)用于風(fēng)機(jī)、注水泵、壓縮機(jī)、輸油泵、抽油機(jī)、潛油電泵和石油鉆機(jī)等。
1、游梁式抽油機(jī)
目前，在油田采用的抽油設(shè)備中，以游梁式抽油機(jī)最為普遍，數(shù)量也最多。
一方面，游梁式抽油機(jī)運(yùn)動為反復(fù)上下提升，一個沖程提升一次，其動力來自電動機(jī)帶動的兩個重量相當(dāng)大的鋼質(zhì)滑塊，當(dāng)滑塊提升時，類似杠桿作用，將采油機(jī)桿送入井中；滑塊下降時，采油桿提出帶油至井口。由于電動機(jī)轉(zhuǎn)速一定，滑塊下降過程中，負(fù)荷減輕，電動機(jī)拖動產(chǎn)生的能量無法被負(fù)載吸收。另一方面，游梁式抽油機(jī)引入兩個大質(zhì)量的鋼質(zhì)滑塊，導(dǎo)致抽油機(jī)的起動沖擊大等問題。
除述兩方面問題外，油田采油的特殊地理環(huán)境決定了采油設(shè)備有其獨(dú)特的運(yùn)行特點(diǎn)：在油井開采前期儲油量大，供液足，為提高功效可采用工頻運(yùn)行，保證較高產(chǎn)油量；在中后期，由于石油儲量減少，易造成供液不足，電動機(jī)若仍工頻運(yùn)行，勢必浪費(fèi)電能，造成不必要損耗，這時須考慮實(shí)際工作情況，適當(dāng)降低電動機(jī)轉(zhuǎn)速，減少沖程，有效提高充盈率。
目前，對游梁式抽油機(jī)的交流變頻調(diào)速技術(shù)改造主要有以下3個方面：
(1)以提高電網(wǎng)質(zhì)量、減小對電網(wǎng)影響為目標(biāo)的變頻改造。這主要集中在供電企業(yè)對電網(wǎng)質(zhì)量要求較高的場合，為避免電網(wǎng)質(zhì)量的下降，需引入變頻控制，其主要目的就是減小抽油機(jī)工作過程對電網(wǎng)的影響。
(2)以節(jié)能為目的變頻改造。這點(diǎn)較為普遍，一方面，油田抽油機(jī)為克服大的起動轉(zhuǎn)矩，采用的電動機(jī)遠(yuǎn)遠(yuǎn)大于實(shí)際所需功率，工作時電動機(jī)利用率一般為20%～30%，最高不會超過50%，電動機(jī)常處于輕載狀態(tài)，造成資源浪費(fèi)。另一方面，抽油機(jī)工作情況的變化，取決于地底下的狀態(tài)，若電動機(jī)始終處于工頻運(yùn)行，也會造成電能浪費(fèi)。為了節(jié)能，提高電動機(jī)工作效率，需進(jìn)行變頻改造。
(3)改變采油桿上行和下行的速度，在一些情況下可以提高生產(chǎn)效率。
在實(shí)際應(yīng)用過程中出現(xiàn)了許多問題，主要集中在游梁式抽油機(jī)發(fā)電狀態(tài)產(chǎn)生能量的處理上。對于上述情況，采用普通變頻器加能耗制動單元和制動電阻可以實(shí)現(xiàn)，這是以消耗電能為代價的制動方式。對于上述情況，必須妥善處理電動機(jī)發(fā)電狀態(tài)產(chǎn)生的電能，將其反饋到電網(wǎng)或數(shù)臺抽油機(jī)變頻器構(gòu)成直流母線式，使這部分能量能得到充分的利用。
2、潛油電泵
油田中應(yīng)用較多的另一種采油設(shè)備是潛油電泵，它是井下工作的多級離心泵，同油管一起放入油井內(nèi)，地面電源通過變壓器、控制器和潛油電泵專用電纜將電能輸送給井下潛油電泵電動機(jī)，把油井中的液體輸送到地面。
由于潛油電泵在地下兩千多米的井底工作，環(huán)境非常惡劣（高溫、強(qiáng)腐蝕等），傳統(tǒng)供電方式工頻1140伏全壓，運(yùn)行故障頻繁，維護(hù)成本高。一方面，潛油電泵在工頻啟動時，啟動電流大，電動機(jī)電纜壓降較大；線路分布參數(shù)的影響，使得啟動過程中反壓較高，容易損壞電纜和電機(jī)的絕緣性，影響使用壽命。潛油電泵損壞后提到地面上修理，僅工程費(fèi)一項(xiàng)就達(dá)5萬元，價值10萬元的電纜平均提上放下5次就須更換，潛油電泵平均每10個月就須維修一次，維修費(fèi)用約8萬元，成本較高。另一方面，潛油電泵在正常工作時，普遍存在著電動機(jī)負(fù)載率較低情況，“大馬拉小車”現(xiàn)象嚴(yán)重。負(fù)載率低導(dǎo)致電機(jī)功率因數(shù)較低。工頻工作時，始終在額定轉(zhuǎn)速下，如井下油量供不應(yīng)求，容易造成“死井”，則損失慘重。為解決該問題，潛油電泵應(yīng)能根據(jù)井下情況變化，調(diào)節(jié)抽油量。傳統(tǒng)調(diào)節(jié)方式是靠更換油嘴調(diào)節(jié)產(chǎn)量，既造成能量損失又不能精確控制，有時使得油泵長期額定轉(zhuǎn)速運(yùn)行；有時使得油井出沙嚴(yán)重，設(shè)備壽命縮短，因而有必要引入交流變頻調(diào)中國上海 ——全球領(lǐng)先的動力管理公司近期推出了最新研發(fā)的新一代Power XL系列DG1通用變頻器。新一代Power XL系列變頻器專門針對現(xiàn)今越發(fā)嚴(yán)苛的商業(yè)和工業(yè)應(yīng)用需求， 廣泛應(yīng)用于暖通空調(diào)、水處理、食品加工和商業(yè)建筑等領(lǐng)域。其中的DG1通用變頻器以其行業(yè)領(lǐng)先的節(jié)能技術(shù)、高過流能力及高穩(wěn)定性設(shè)計(jì)，為客戶實(shí)現(xiàn)電力能源的更加安全、可靠、節(jié)能的管理。
電路保護(hù)和控制事業(yè)部亞太區(qū)副總裁兼總經(jīng)理Christopher Butler 表示：“始終將探索能源保護(hù)的解決方案放在首位，而DG1通用變頻器正很好地滿足了節(jié)能這一目標(biāo)。DG1通用變頻器的電源裝置采用了最先進(jìn)的半導(dǎo)體技術(shù)和高度模塊化結(jié)構(gòu)，延續(xù)了一貫堅(jiān)持產(chǎn)品創(chuàng)新以靈活應(yīng)對廣泛的客戶需求的優(yōu)良傳統(tǒng)。”
DG1通用變頻器配有享有專利的節(jié)能控制系統(tǒng)(Active Energy Control)，通過靈活調(diào)整參數(shù)以最大限度地降低電動機(jī)的能耗，與其它同類產(chǎn)品相比可額外節(jié)約5%-8%的能源， 令客戶快速獲得投資回報(bào)。
新一代變頻器在傳統(tǒng)穩(wěn)健設(shè)計(jì)的基礎(chǔ)上增強(qiáng)了產(chǎn)品特性和功能，確保在價格合適的基礎(chǔ)上，為客戶提供最佳解決方案。產(chǎn)品控制模塊的設(shè)計(jì)整合了當(dāng)今的標(biāo)準(zhǔn)通訊協(xié)議和接口， 同時保留了可添加輔助選項(xiàng)卡的模塊化特性。與此同時，液晶顯示面板、啟動向?qū)?、PC軟件工具和嵌入式應(yīng)用軟件確保了操作簡易性，而產(chǎn)品的標(biāo)配涂層板則可以有效防止惡劣臟亂環(huán)境帶來的損傷。
的電氣業(yè)務(wù)在配電和電路保護(hù)、備用電源保護(hù)、控制與自動化、照明與安全、架構(gòu)與布線設(shè)備、惡劣和危險環(huán)境解決方案與工程服務(wù)等諸多領(lǐng)域處于全球領(lǐng)先地位。憑借其全球化解決方案，積極應(yīng)對當(dāng)今世界最苛刻的電力管理挑戰(zhàn)。
是一家全球領(lǐng)先的動力管理公司，2013年銷售額達(dá)220億美元。致力于提供各種節(jié)能高效的解決方案，以幫助客戶更有效、更安全、更具可持續(xù)性地管理電力、流體動力和機(jī)械動力。在全球擁有約10.2萬名員工，產(chǎn)品銷往超過175多個國家和地區(qū)。
速控制系統(tǒng)，調(diào)節(jié)油壓、調(diào)節(jié)產(chǎn)量。
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ALLEN BRADLEY 20BD011A0AYNAEC1 USPP 20BD011A0AYNAEC1
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ALLEN BRADLEY 20BD014A3AYYAND0 USPP 20BD014A3AYYAND0
ALLEN BRADLEY 1336S-BRF30-AA-EN-HA1 NSPP 1336SBRF30AAENH1
ALLEN BRADLEY 1336S-BRF30-AA-EN4-HA2 USPP 1336SBRF30AAEN4H
ALLEN BRADLEY 6008-LTV USPP 6008LTV
ALLEN BRADLEY 500FL-FOB93 USPP 500FLFOB93
Allen Bradley 809A02E NSNP **GENUINE** AB 809 A02E
ALLEN BRADLEY 1771-NT2 USPP 1771NT2
ALLEN-BRADLEY 5562S 1756-L62S GUARDLOGIX SAFETY PROCESSOR
ALLEN BRADLEY 20BD5P0A3AYNANC0NNAD NSFP 20BD5P0A3AYNANC0
ALLEN-BRADLEY 1771-NOV High Resolution Isolated Analog Module NEW IN BOX
ALLEN BRADLEY 1756-IT6I NSFP 1756IT6I
ALLEN BRADLEY 1784-KT2 NSFP 1784KT2
ALLEN BRADLEY 1336-B003-ECD-L3 USPP 1336B003ECDL3
ALLEN BRADLEY 1336-C005-EOD USPP 1336C005EOD
ALLEN BRADLEY 1305-BA06A-HAP USPP 1305BA06AHAP
ALLEN BRADLEY 1771-PT3 NSFP 1771PT3
ALLEN BRADLEY 8000-KDHWZ USPP 8000KDHWZ
1772-LW/D ALLEN BRADLEY PLC MODULES REMANUFACTURED
Allen-Bradley 1747-L542P
ALLEN BRADLEY 1336-B005-BOD-L3-S1 USPP 1336B005BODL3S1
ALLEN BRADLEY 809-A2 USPP 809A2
ALLEN BRADLEY 150-A24NB NSFP 150A24NB
ALLEN BRADLEY 1771-NIV -FS- 1771NIV
ALLEN BRADLEY 1336S-BRF50-AA-EN4-HA2-L9E USPP 1336SBRF50AAEN46
ALLEN BRADLEY 1756-IT6I2 FNFP 1756IT6I2
ALLEN BRADLEY 1305-BA01A-HAP USPP 1305BA01AHAP
ALLEN BRADLEY 20DB9P6A3EYNANANE USPP 20DB9P6A3EYNANAN
ALLEN BRADLEY 2540-AB-A USPP 2540ABA
Allen Bradley Logix 1756L1M1 Series A CPU - FACTORY SEAL!
Allen-Bradley Circuit Breaker 140U-K0_140UK0_140U-K0X3 A_140UK0X3A
ALLEN BRADLEY 1756-L63 SERIES A, NEW*
ALLEN BRADLEY 1336S-C010-AN-EN SERIES A *USED*
ALLEN BRADLEY 1388-AV40 DC SERVO CONTROLLER *NEW IN A BOX*
ALLEN BRADLEY 1336S-C010-AN-EN SERIES B *USED*
ALLEN BRADLEY 440L-PJ1120YD SERIES A GUARDSHIELD PAIR *NEW IN A BOX*
ALLEN BRADLEY DRIVE 1336S-A010-AA-EN4-L6 *NICE*
Allen Bradley 1756-L63/A Logix 5563 Processor PLC G01
Allen Bradley PLC-3 Keyboard 1770-FEC Ser A _ Firm G _A
ALLEN BRADLEY 5KW SYSTEM MODULE 1394-SJT05-C-RL
Allen Bradley 1774-C12 Computer Interface Module, Firmware Rev:C SERIES:A
ALLEN BRADLEY PANELVIEW PLUS 2711PC-T10C4D8 2711PCT10C4D8 *NEW SEALED 2014*
Allen Bradley AC Drive 1336S-BRF100-AN-EN4-L6 #49389
ALLEN BRADLEY PANELVIEW 1400E 2711E-K14C6X SER. G
ALLEN BRADLEY 1771-HS3CR A 3 AXIS SERVO CONTROLLER
NEW! ALLEN-BRADLEY MOTOR CONTROLLER 150-B24NBRD 150B24NBRD SERIES A
ALLEN BRADLEY 250A 1370 DC DRIVE MODULE 1370DDM-250
ALLEN BRADLEY NEMA SIZE 3 COMBINATION MOTOR CONTROLLER 512-DJB-6P-27R SER. D
1785-L30B Series E ALLEN BRADLEY 1785L30B
**SEALED** Allen Bradley 1771-DCM/1771DCM Comm Module Series B **WARRANTY**
Allen Bradley 1771-NBV1/1771NBV1 High Resolution Module OFFERS ACCEPTED!!
Allen Bradley 1771-NBV1/1771NBV1 High Resolution Analog OFFERS ACCEPTED!!
NEW LISTING NNB ALLEN BRADLEY N-4220-2-H00AA
ALLEN BRADLEY 1771-NT1 C HIGH RESOLUTION ANALOG - NEW
ALLEN BRADLEY AC DRIVE 1305-BA04A SERIES C *NEW IN BOX*
ALLEN BRADLEY 1336-C010-EAD USPP 1336C010EAD
ALLEN BRADLEY 7.5HP AC DRIVE 1336-B007-EJD-L3 ~ New in box
ALLEN BRADLEY MPL-B220T-VJ42AA USPP MPLB220TVJ42AA
ALLEN BRADLEY MPL-A330P-HK22AA USPP MPLA330PHK22AA
NEW Allen Bradley 1771-ACNR B ControlNet 1771ACNR B Adapter
ALLEN BRADLEY 1771-M3 SERIES B SERVO CONTROLLER MODULE *REMANUFACTURED*
Allen Bradley 1771-IXE Series D | Temperature Module *NIB*
ALLEN BRADLEY 1336S-BRF30-AN-EN5 USPP 1336SBRF30ANEN5
ALLEN BRADLEY 1336S-BRF50-AA-EN4-HAP-L6 USPP 1336SBRF50AAEN41
ALLEN BRADLEY 1785-L30B/E USPP 1785L30BE
ALLEN BRADLEY 2090-SCVG-100-0 NSFP 2090SCVG1000
ALLEN BRADLEY Y-1003-2-H00AA USPP Y10032H00AA
ALLEN BRADLEY 1326AB-B3E-21 USPP 1326ABB3E21
ALLEN BRADLEY 1326AB-B3C-11 USPP 1326ABB3C11
ALLEN BRADLEY 1336-B010-EAD-FA2-L3 USPP 1336B010EADFA2LA
ALLEN BRADLEY 1756-L55M12 -FS- 1756L55M12
ALLEN BRADLEY 20AD011A3AYNAENN USPP 20AD011A3AYNAENN
ALLEN BRADLEY 1333-EAC USPP 1333EAC
ALLEN BRADLEY 1336-RFB-48-B USPP 1336RFB48B
ALLEN BRADLEY 1336-B003-EAD-FA2-L1 USPP 1336B003EADFA2L1
ALLEN BRADLEY 1336-B003-EAD-FA2-L2 USPP 1336B003EADFA2L2
ALLEN BRADLEY 2755-L7RC USPP 2755L7RC
ALLEN BRADLEY 1336S-BRF30-AN-EN4-HA2-L6 USPP 1336SBRF30ANEN41
ALLEN BRADLEY 1336S-BRF50-AN-EN4-HA2-L6E USPP 1336SBRF50ANEN42
ALLEN BRADLEY 1336S-BRF50-AN-EN5-HA2-L6 USPP 1336SBRF50ANEN51
FACTORY SEAL ALLEN-BRADLEY 1769-L33ERM 1769L33ERM SER A , MFG 11/2013
Allen-Bradley 1771-NIVR/B
ALLEN BRADLEY 1772-MEB NSPP 1772MEB
ALLEN BRADLEY 7300-UAE-2 NSFP 7300UAE2 8月5日到這
SEALED ALLEN BRADLEY 1771-NIV1 SERIES C ANALOG MODULE MFG DATE 2012 177INIVI NIB
*NEW SEALED* 2014! 1769-L33ERM Allen Bradley CompactLogix Ethernet Controller
ALLEN BRADLEY 1305-BA02A-DE-HA2 USPP 1305BA02ADEHA2
ALLEN BRADLEY 1336F-BRF75-AA-EN USPP 1336FBRF75AAEN
ALLEN BRADLEY 1336F-BRF100-AA-EN-HASP-L6 USPP 1336FBRF100AAENE
ALLEN BRADLEY 1388-BAV20-A06 USPP 1388BAV20A06
ALLEN BRADLEY 6008-SI USPP 6008SI
ALLEN BRADLEY 1756-IF6I FNFP 1756IF6I
NEW ALLEN BRADLEY 1784-PKTXD SER B 1784-PKTX 1784PKTXD NIB
ALLEN BRADLEY 2 AXIS SERVO AC DRIVE 4100-232-L SERIES P
Allen Bradley 2711-M3A18L1A Panelview 300 Micro Keypad Terminal New FRN4.48 Fast
ALLEN BRADLEY 8500-A1D-L1B USPP 8500A1DL1B
Allen-Bradley 1756-L1M3
ALLEN BRADLEY 2094-BL02 USPP 2094BL02
ALLEN BRADLEY 1772-LN3 NSPP 1772LN3
ALLEN BRADLEY 1336-151146 NSFP 1336151146
ALLEN BRADLEY 1336-B007-EOD-L3-S1 USPP 1336B007EODL3S1
ALLEN BRADLEY 1330-BAA-GJ2L2 NSPP
