產(chǎn)品內(nèi)容介紹
Kollmorgen B-102-A-21運(yùn)行減速機(jī)
REG670用于保護(hù)從相對(duì)較小的機(jī)組到最大的發(fā)電機(jī)組，對(duì)發(fā)電機(jī)和發(fā)電機(jī)變壓器組進(jìn)行控制和監(jiān)測(cè)。IED有一個(gè)全面的功能庫(kù)，涵蓋了大多數(shù)發(fā)電機(jī)應(yīng)用的要求?？捎玫拇罅磕M輸入與大型功能庫(kù)一起，使許多功能集成在一個(gè)IED中。在典型應(yīng)用中，兩個(gè)單元可以提供全部功能，也可以提供高度冗余。REG670也可用于保護(hù)和控制并聯(lián)電抗器。定子接地故障保護(hù)包括傳統(tǒng)的95%以及100%注入和三次諧波保護(hù)。當(dāng)使用基于注入的保護(hù)時(shí)，100%的機(jī)器定子繞組，包括星點(diǎn)，在所有操作模式下都受到保護(hù)?；谌沃C波的100%定子接地故障保護(hù)采用三次諧波差動(dòng)電壓原理。即使機(jī)器處于靜止?fàn)顟B(tài)，基于注入的100%定子接地故障保護(hù)也可以運(yùn)行。IED中包括極滑、欠勵(lì)磁、轉(zhuǎn)子接地故障、負(fù)序電流保護(hù)等久經(jīng)驗(yàn)證的算法。REG670中的發(fā)電機(jī)差動(dòng)保護(hù)適用于考慮了長(zhǎng)直流時(shí)間常數(shù)和短跳閘時(shí)間要求等因素的發(fā)電機(jī)應(yīng)用。由于許多保護(hù)功能可以作為多個(gè)實(shí)例使用，因此可以在一個(gè)IED中保護(hù)多個(gè)對(duì)象?？梢詾榧稍诰哂邪l(fā)電機(jī)主保護(hù)的同一IED中的輔助電力變壓器提供保護(hù)。因此，這一概念可以實(shí)現(xiàn)非常經(jīng)濟(jì)高效的解決方案。
差動(dòng)保護(hù)
發(fā)電機(jī)差動(dòng)保護(hù)GENPDIF定子繞組相間短路通常會(huì)導(dǎo)致非常大的故障電流。短路有損壞絕緣、繞組和定子鐵芯的風(fēng)險(xiǎn)。較大的短路電流會(huì)產(chǎn)生較大的力，甚至?xí)p壞發(fā)電廠中的其他部件，如渦輪機(jī)和發(fā)電機(jī)渦輪軸。為了限制定子繞組短路造成的損壞，故障清除必須盡可能快（瞬時(shí)）。如果發(fā)電機(jī)組與靠近其他發(fā)電機(jī)組的電力系統(tǒng)相連，則快速故障清除對(duì)于保持非故障發(fā)電機(jī)的瞬態(tài)穩(wěn)定性至關(guān)重要。REG670還可以實(shí)現(xiàn)寶貴的監(jiān)控可能性，因?yàn)樵S多過(guò)程值可以傳輸?shù)讲僮鲉THMI。廣泛的應(yīng)用靈活性使該產(chǎn)品成為新裝置和現(xiàn)有發(fā)電廠翻新的最佳選擇。串行數(shù)據(jù)通信通過(guò)光纖連接來(lái)確?？垢蓴_能力。廣泛的應(yīng)用靈活性使該產(chǎn)品成為新裝置和現(xiàn)有裝置翻新的最佳選擇。通過(guò)使用專利算法REG670（或670系列的任何其他產(chǎn)品），可以在9Hz到95Hz的很寬范圍內(nèi)跟蹤電力系統(tǒng)頻率。為此，最好將發(fā)電機(jī)端子的三相電壓信號(hào)連接至IED。然后IED可以采用其濾波算法，以便正確測(cè)量連接到IED的所有電流和電壓信號(hào)的相位。該特性對(duì)于發(fā)電機(jī)啟動(dòng)和停機(jī)過(guò)程中保護(hù)裝置的正確運(yùn)行至關(guān)重要。
The REG670 is used for protection
control and monitoring of generators and generator-transformer blocks from relatively small units up to the largest generating units. The IED has a comprehensive function library, covering the requirements for most generator applications. The large number of analog inputs available enables, together with the large functional library, integration of many functions in one IED. In typical applications two units can provide total functionality, also providing a high degree of redundancy. REG670 can as well be used for protection and control of shunt reactors. Stator earth fault protection, both traditional 95% as well as 100% injection and 3rd harmonic based are included. When the injection based protection is used, 100% of the machine stator winding, including the star point, is protected under all operating modes. The 3rd harmonic based 100% stator earth fault protection uses 3rd harmonic differential voltage principle. Injection based 100% stator earth fault protection can operate even when machine is at standstill. Well proven algorithms for pole slip, underexcitation, rotor earth fault, negative sequence current protections, and so on, are included in the IED. The generator differential protection in the REG670 adapted to operate correctly for generator applications where factors as long DC time constants and requirement on short trip time have been considered. As many of the protection functions can be used as multiple instances there are possibilities to protect more than one object in one IED. It is possible to have protection for an auxiliary power transformer integrated in the same IED having main protections for the generator. The concept thus enables very cost effective solutions.
Differential protection
Generator differential protection GENPDIF Short circuit between the phases of the stator windings causes normally very large fault currents. The short circuit gives risk of damages on insulation, windings and stator iron core. The large short circuit currents cause large forces, which can cause damage even to other components in the power plant, such as turbine and generator-turbine shaft. To limit the damage due to stator winding short circuits, the fault clearance must be as fast as possible (instantaneous). If the generator block is connected to the power system close to other generating blocks, the fast fault clearance is essential to maintain the transient stability of the non-faulted generators. The REG670 also enables valuable monitoring possibilities as many of the process values can be transferred to an operator HMI. The wide application flexibility makes this product an excellent choice for both new installations and for refurbishment in existing power plants. Serial data communication is via optical connections to ensure immunity against disturbances. The wide application flexibility makes this product an excellent choice for both new installations and the refurbishment of existing installations. By using patented algorithm REG670 (or any other product from 670 series) can track the power system frequency in quite wide range from 9Hz to 95Hz. In order to do that preferably the three-phase voltage signal from the generator terminals shall be connected to the IED. Then IED can adopt its filtering algorithm in order to properly measure phasors of all current and voltage signals connected to the IED. This feature is essential for proper operation of the protection during generator start-up and shut-down procedure.
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