華鵬 油浸式電力變壓器產(chǎn)品手冊(cè)

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華鵬 油浸式電力變壓器產(chǎn)品手冊(cè)

華鵬 油浸式電力變壓器產(chǎn)品手冊(cè)
文本預(yù)覽
江蘇華鵬變壓器有限公司
220kV~500kV 級(jí)油浸式變壓器產(chǎn)品特點(diǎn)介紹
An Introduction to the Features
of Huapeng 220kV~500kV Oil-immersed Transformers
我公司可以為用戶提供220kV~500kV級(jí),容量20~
1200MVA系列油浸式電力變壓器,這是我公司在消化國(guó)內(nèi)
外先進(jìn)變壓器制造理念,結(jié)合我公司多年來生產(chǎn)電力變壓
器的經(jīng)驗(yàn),通過優(yōu)化創(chuàng)新,成功生產(chǎn)的低噪聲、低損耗、
低局放、高抗短路能力的系列變壓器,完全符合國(guó)家最新
標(biāo) 準(zhǔn) GB1094.1 ~ 5 及 國(guó) 際 電 工 委 員 會(huì) 推 薦 標(biāo) 準(zhǔn)
IEC-60076。其主要特點(diǎn)介紹如下:
The range of Huapeng 220kV ~ 500kV
oil-immersed power transformers is from 20 up to
1200MVA. The production is based on world-wide
advanced technology and also incorporates our
long-term outstanding experiences. Low partial
discharge and high short circuit withstand capability are
achieved in our 220kV~500kV transformer series.
Huapeng 220kV~500kV transformers comply entirely
with latest national standard GB1094.1 ~ 5 and
international standard IEC-60076. The outstanding
features are:
1.損耗小,噪音低
鐵心片采用進(jìn)口高性能硅鋼片,五級(jí)全斜接縫的疊片
形式,空載損耗和噪音均較小。油箱采用屏蔽技術(shù),鐵心結(jié)構(gòu)件按在漏磁場(chǎng)中所處的位置
不同分別采用了降低渦流損耗的措施,這不但降低了負(fù)載損耗,而且從根本上解決了變壓
器局部過熱的可能。我公司設(shè)計(jì)、生產(chǎn)的220kV~500kV級(jí)變壓器性能指標(biāo)均達(dá)到或超過國(guó)
標(biāo)11型標(biāo)準(zhǔn),噪音更是遠(yuǎn)遠(yuǎn)低于國(guó)家標(biāo)準(zhǔn)。
1. Low loss, low noise
The core laminations are composed of imported high quality grain-oriented
cold-rolled silicon steel sheets with miter joints and the joints are lapped with 5 steps, thus
ensuring low loss and low noise. The inside of the tank is lined with shields. Measures
have also been taken for metallic structural parts located in high magnetic field, to reduce
stray loss, thereby the total load loss, and to relieve local overheating.
12.運(yùn)行安全可靠
我公司始終將產(chǎn)品的可靠性放在第一位,變壓器絕緣設(shè)計(jì)留有相當(dāng)?shù)脑6?,產(chǎn)品局部放
電量保持在 100pC 以下,可確保變壓器在長(zhǎng)期工作電壓和短時(shí)過電壓下穩(wěn)定運(yùn)行,從延長(zhǎng)
變壓器使用壽命和提高抗短路能力考慮,變壓器繞組溫升和油面溫升均低于國(guó)家標(biāo)準(zhǔn)5K以
上,變壓器短路時(shí),繞組導(dǎo)線的機(jī)械應(yīng)力較低,再配合其它抗短路措施及嚴(yán)格的生產(chǎn)工藝
保證,同時(shí)可以采用繞組內(nèi)部熱點(diǎn)溫升控制變壓器的運(yùn)行,我公司220kV~500kV變壓器完
全可承受各種短路情況的考驗(yàn)。
2. Safe and reliable service
Reliability is the everlasting objective of Huapeng Co. Partial discharge of finished
products are constantly kept below 100pC, ensuring that the transformers can be operated
under long service voltage and also under short time overvoltage. Appropriate cooling
arrangement and relatively low current density ensure that the winding temperature rise is
much lower, at least 5K, than specified in the national standard. The mechanical stress in
winding conductors during short circuit is also kept well below safe limit. Together with
technological procedures during manufacture and other means to elevate mechanical
strength, Huapeng 220kV~500kV transformers can withstand severe short circuit in all
cases during service.
3.安裝維護(hù)方便
為減少現(xiàn)場(chǎng)安裝工作量并使安裝工作順利進(jìn)行,變壓器現(xiàn)場(chǎng)安裝時(shí)不需吊罩檢查,所
有附件在工廠均進(jìn)行預(yù)裝,二次線路電纜在工廠內(nèi)已布置在變壓器本體并引入端子箱和控
制箱中。我公司設(shè)計(jì)生產(chǎn)的480MVA以下的電力變壓器均采用自然油循環(huán)風(fēng)冷的冷卻方式,
在風(fēng)機(jī)停止工作時(shí)仍具有70%冷卻容量,240MVA以下電力變壓器可采用全自冷的冷卻方式,
冷卻系統(tǒng)幾乎不需維護(hù)。
3. Easy erection and maintenance
To minimize erection work at site, Huapeng transformers are so fabricated that lifting
the active part out of the tank for inspection after arrival at site is not mandatory. Besides,
all components to be mounted on the transformer at site have been pre-assembled before
dispatch, and all secondary wirings have been laid down into conduits on the transformer
and connected to the terminals in the control cabinet or terminal box. Natural oil
circulation and forced air cooling (ONAF) are generally adapted in our transformers
below 480MVA, and 70% nameplate rating can be achieved in case the fans are out of
service. Natural oil circulation is adapted in transformers below 240MVA.Little
maintenance work is required for the cooling devices.
24.精工細(xì)作
利用立繞機(jī)張緊裝置繞制線圈,降低繞制系數(shù),保證所有繞組的徑向繞緊力,提高繞
組的自身強(qiáng)度,結(jié)合利用繞組先組裝后整體套裝的工藝,使器身裝配公差減小,從而提高
器身的整體強(qiáng)度;繞組墊塊等受力絕緣件全部采用特硬紙板制成,以減小絕緣件的收縮量,
繞組繞制與組裝完工后須經(jīng)過二次真空干燥,器身裝配后再進(jìn)行一次煤油氣相干燥,確保
各部分的絕緣充分收縮以保證在運(yùn)行中絕緣件不再收縮;所有高壓電極和金屬結(jié)構(gòu)件均進(jìn)
行圓角化,避免尖端放電,同時(shí)確保高壓套管均壓球處于均勻電場(chǎng)中;引線采用冷壓焊,
進(jìn)行屏蔽處理實(shí)現(xiàn)圓角化;器身經(jīng)過大型煤油氣相干燥設(shè)備的干燥后大大降低了絕緣件的
含水量,提高了器身的清潔度;油箱焊接后經(jīng)整形處理并消除焊接應(yīng)力,整體噴砂,保證
變壓器外觀整潔,不滲不漏。
4. Careful fabrication
Vertical winding machines with tension device are used for winding, so that the
windings can be wound tightly and therefore mechanically strong as a whole. All
insulation parts subjected to mechanical stress during short circuit, such as spacers in
windings are made with T4 densified pressboard to reduce shrinkage. Individual windings
are dried first, followed by a second drying of the assembled phase block. After core and
coil assembly, Vapor Phase Drying (VPD) is once again carried out to ensure that all
insulation parts are thoroughly dried and no further shrinkage is possible to occur during
service. All the high voltage terminals and nearby metallic structural parts are rounded up
to prevent partial discharge. High voltage bushing terminals are contained within turrets,
and kept concentric with the turret. All the leads are properly crimped and metallized to be
rounded up. VPD process insures that the moisture content within the transformer is kept
at a very low level, and the core and coil assembly is once more cleaned by condensed
vapor flowing down the surfaces. The fabricated tanks are relieved from welding stress
and shot-blasted integrally, so as to be free from oil leakage trouble and to give the tank a
clean, pleasant looking appearance.
3500kV 三相雙繞組無勵(lì)磁調(diào)壓電力變壓器技術(shù)數(shù)據(jù)表
Technical Data Table of Three-phase
Two-winding Off-circuit Tap Changing Power Transformers
額定電壓 短路阻抗
聯(lián)結(jié)組 負(fù)載損耗 空載損耗
型 號(hào) Rated Voltage (kV) Short-Circuit
標(biāo)號(hào) Load Loss No-Load Loss
0/200
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華鵬 油浸式電力變壓器產(chǎn)品手冊(cè)

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