產(chǎn)品內(nèi)容介紹
Benshaw BIPC-300016-01中壓脈沖卡
靈敏轉(zhuǎn)子接地故障保護(hù)基于注入的ROTIPHIZ靈敏轉(zhuǎn)子接地故障保護(hù)（ROTIPHI）用于檢測(cè)發(fā)電機(jī)轉(zhuǎn)子繞組中的接地故障。ROTIPHIZ適用于所有類型的同步發(fā)電機(jī)。為了實(shí)現(xiàn)上述概念，需要一個(gè)單獨(dú)的注射箱。注射箱以特定的預(yù)設(shè)頻率產(chǎn)生方波電壓信號(hào)，該信號(hào)被送入轉(zhuǎn)子繞組。注入電壓信號(hào)的大小和產(chǎn)生的注入電流通過(guò)位于注入箱內(nèi)的電阻分流器測(cè)量。這兩個(gè)測(cè)量值被輸入IED。根據(jù)這兩個(gè)測(cè)量值，保護(hù)IED確定轉(zhuǎn)子繞組對(duì)地電阻。然后將電阻值與預(yù)設(shè)故障電阻報(bào)警和跳閘水平進(jìn)行比較。保護(hù)功能可以檢測(cè)整個(gè)轉(zhuǎn)子繞組和相關(guān)連接中的接地故障。需要注入裝置REX060和耦合電容器裝置REX06才能正確運(yùn)行。100%定子接地故障保護(hù)，基于注入的STTIPHIZ 100%定子接地線故障保護(hù)STTIPHI用于檢測(cè)發(fā)電機(jī)和電機(jī)定子繞組中的接地故障。STTIPHIZ適用于通過(guò)塊連接的單元變壓器連接到電力系統(tǒng)的發(fā)電機(jī)。一個(gè)與發(fā)電機(jī)額定頻率不同的特定頻率的獨(dú)立信號(hào)被注入定子電路。該注入信號(hào)的響應(yīng)用于檢測(cè)定子接地故障。為了實(shí)現(xiàn)上述概念，需要一個(gè)單獨(dú)的注射箱。注入箱產(chǎn)生方波電壓信號(hào)，例如可以饋入發(fā)電機(jī)中性點(diǎn)電壓互感器或接地變壓器的二次繞組。該信號(hào)通過(guò)變壓器傳播到定子電路
注入電壓信號(hào)的幅值
在中性點(diǎn)電壓互感器或接地變壓器的二次側(cè)測(cè)量。此外，產(chǎn)生的注入電流通過(guò)位于注入箱內(nèi)的電阻分流器進(jìn)行測(cè)量。這兩個(gè)測(cè)量值被輸入IED。根據(jù)這兩個(gè)測(cè)量值，IED確定定子繞組對(duì)地電阻。然后將電阻值與預(yù)設(shè)故障電阻報(bào)警和跳閘水平進(jìn)行比較。保護(hù)功能不僅可以檢測(cè)發(fā)電機(jī)星點(diǎn)處的接地故障，還可以檢測(cè)定子繞組和發(fā)電機(jī)端子處的接地線故障，包括電壓互感器、斷路器、勵(lì)磁變壓器等連接部件。所使用的測(cè)量原理不受發(fā)電機(jī)運(yùn)行模式的影響，即使發(fā)電機(jī)處于靜止?fàn)顟B(tài)，也能充分發(fā)揮作用。仍然需要基于中性點(diǎn)基頻位移電壓的標(biāo)準(zhǔn)95%定子接地故障保護(hù)，與100%定子接地保護(hù)功能并聯(lián)運(yùn)行。需要注入裝置REX060和可選并聯(lián)電阻裝置REX06才能正常工作。5.電流保護(hù)瞬時(shí)相過(guò)電流保護(hù)PHPIOC瞬時(shí)三相過(guò)電流功能具有較低的瞬時(shí)過(guò)電流和較短的跳閘時(shí)間，允許用作高設(shè)置短路保護(hù)功能。四步相過(guò)流保護(hù)OC4PTOC四步相過(guò)流保護(hù)功能OC4PTOC具有獨(dú)立于步驟1和4的反時(shí)限或定時(shí)限延時(shí)。第2步和第3步總是定時(shí)延遲。所有IEC和ANSI反時(shí)限特性與可選的用戶定義時(shí)間特性一起可用。定向功能是通過(guò)記憶電壓極化的。對(duì)于每個(gè)步驟，可以單獨(dú)將功能設(shè)置為定向或非定向。
Sensitive rotor earth fault protection
injection based ROTIPHIZ The sensitive rotor earth fault protection (ROTIPHIZ) is used to detect earth faults in the rotor windings of generators. ROTIPHIZ is applicable for all types of synchronous generators. To implement the above concept, a separate injection box is required. The injection box generates a square wave voltage signal at a certain preset frequency which is fed into the rotor winding. The magnitude of the injected voltage signal and the resulting injected current is measured through a resistive shunt located within the injection box. These two measured values are fed to the IED. Based on these two measured quantities, the protection IED determines the rotor winding resistance to ground. The resistance value is then compared with the preset fault resistance alarm and trip levels. The protection function can detect earth faults in the entire rotor winding and associated connections. Requires injection unit REX060 and a coupling capacitor unit REX061 for correct operation. 100% stator earth fault protection, injection based STTIPHIZ The 100% stator earth-fault protection STTIPHIZ is used to detect earth faults in the stator windings of generators and motors. STTIPHIZ is applicable for generators connected to the power system through a unit transformer in a block connection. An independent signal with a certain frequency different from the generator rated frequency is injected into the stator circuit. The responce of this injected signal is used to detect stator earth faults. To implement the above concept, a separate injection box is required. The injection box generates a square wave voltage signal which for example can be fed into the secondary winding of the generator neutral point voltage transformer or grounding transformer. This signal propagates through this transformer into the stator circuit
The magnitude of the injected voltage signal
is measured on the secondary side of the neutral point voltage transformer or grounding transformer. In addition, the resulting injected current is measured through a resistive shunt located within the injection box. These two measured values are fed to the IED. Based on these two measured quantities, the IED determines the stator winding resistance to ground. The resistance value is then compared with the preset fault resistance alarm and trip levels. The protection function can not only detect the earth fault at the generator star point, but also along the stator windings and at the generator terminals, including the connected components such as voltage transformers, circuit breakers, excitation transformer and so on. The measuring principle used is not influenced by the generator operating mode and is fully functional even with the generator at standstill. It is still required to have a standard 95% stator earth-fault protection, based on the neutral point fundamental frequency displacement voltage, operating in parallel with the 100% stator earth-fault protection function. Requires injection unit REX060 and optional shunt resistor unit REX062 for correct operation. 5. Current protection Instantaneous phase overcurrent protection PHPIOC The instantaneous three phase overcurrent function has a low transient overreach and short tripping time to allow use as a high set short-circuit protection function. Four step phase overcurrent protection OC4PTOC The four step phase overcurrent protection function OC4PTOC has an inverse or definite time delay independent for step 1 and 4 separately. Step 2 and 3 are always definite time delayed.All IEC and ANSI inverse time characteristics are available together with an optional user defined time characteristic. The directional function is voltage polarized with memory. The function can be set to be directional or non-directional independently for each of the steps.
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