Wani yana da take da takarda na iya ɗaukan sauka a cikin teknologi?
Karamin statistik, yawan abubuwa da aka fi sani a wasu kungiyoyi na gaba-ba-tsohon rarrabe masu iya zama "zamani", wanda abubuwan da suka dace sun haɗa da 10%. Yanzu, don linar da tsarin 10kV, amfani da reclosers mai zurfi da sectionalizers zai iya inganta tushen kwallon kirkiro bayan abubuwan zamani, kuma kan zama abubuwan da suka dace. Yana da kyau a duba yanayin gwamnatiyar recloser mai zurfi don inganta kyakkyawarsa.
1. Bincike na Siyasa da Kudanci na Fannoni
1.1 Kategoriyoyi na Reclosers Mai Zurfi
Reclosers mai zurfi ana kategorize a matsayin current-type reclosers da voltage-type reclosers. Current-type recloser shine wanda zai iya baka ba da kusa a cikin harkokin shiga idan an samu abubuwan current. Wannan irin recloser ya yi waɗannan mafi girman harkokin shiga da kuma babuwa ta hanyar current. Ana saukar da kafin shiga har zuwa lokacin da aka fi sani, kafin aka sami kafin shiga da abubuwa. Saboda haka, ya kamata da harkokin shiga da kusa da current, kuma yana da muhimmanci mai yawa a kan grid. Duk da haka, ya kamata da harkokin shiga masu kusa da kuma lokaci mai yawa. Saboda haka, babu da kyau a kunshi kafin shiga mafi biyu. Yana da kyau a fannin kafin shiga da radial type lines.
Wannan irin recloser, voltage-type recloser, yana shiga idan an juye voltage a cikin line, kuma baka ba da kusa a cikin lokacin da aka biyo. Circuit breaker na substation ya kamata a baka ba da kusa mafi biyu don kammala isolar da kafin shiga da kuma inganta tushen kwallon kirkiro. A baka ba da kusa na farko shine don sanar da kafin shiga da abubuwa. Ta haka, ita ce muke saukar da kafin shiga da abubuwa. Da kuma kafin shiga na biyu shine don inganta tushen kwallon kirkiro ga kafin shiga da ba da abubuwa ba.
Dukkan line ya fara da harkokin shiga da kusa mafi girma a cikin harkokin baka ba da kusa, amma ya kamata da lokaci mai yawa don kammala isolar da kafin shiga da kuma inganta tushen kwallon kirkiro. Saboda over-current quick-break protection ya kamata a kammalace da circuit breaker na substation, ba ya da kyau a fannin kafin shiga mafi yawa. Amma, da yawan takarda na system, wannan matsalolin ya zama lafiya. Yana da kyau a fannin kafin shiga da radial type ko loop type short lines don inganta automation na farko.
1.2 Masu Nufin Don Harkokin Shiga Tradishini
Saboda batun da suka faruwa daga harkokin shiga da kusa da kuma nasara, reclosers mai zurfi suka iya faɗa ko yi harkokin da ba daidai. Yanzu, harkokin reclosers mai zurfi ana yi ne da karamin sadarwa mai karatu, wanda ke nuna takaddun mutane da kuma nau'in kayayyakin.
1.3 Tasirin Binciken da Fannoni na Ilimi a Gida da Kudanci
A nan, a China, ana yi amfani da sadarwa mai karatu, kamar tests na insulation resistance, insulation resistance tests na control circuit, AC withstand voltage tests, k.s.
Masu nufin da suke faruwa shine sadarwar da ke da ciwo, kuma ba da kyau a kawo. A lokacin harkokin sadarwa, an buƙaci don kara, wanda yake da ala'umtattuka. Ba tare da haka, harkokin ke nuna da yawan mutane da kuma kayayyaki. Yanzu, kowane masu harkokin da kuma diagnosis da suka dace suka da shiga da amfani a cikin production.
Harkokin da kuma analysis na recloser controllers mai zurfi suka faru waɗannan. Yanzu, ana yi amfani da automatic analyzers da suka dace. Yana buƙata da kawo interface ne da kuma ana iya kawo da reclosers mai zurfi daga masu amfani da su a matsayin "plug-and-play". Idan an jiye current signals da recloser, za a iya kawo da ma'adantattun TCC (Time-Current Characteristic) curve da kuma sequence na control.
Yana iya kawo da kontrolin parametarren da suka dace, kamar waveform, time, da amplitude na current signal. Ba tare da haka, yana iya rubuta record da response information na current controller, da response time accurate to microseconds. Yana iya kawo da kontrolin da kuma execute test na duk lokacin da kuma display results na text instantly, kamar display commands generated by the current input response together with the measurement and recording events, including tripping, reclosing, and reset blocking.
Binciken intelligent fault diagnosis yana da muhimmanci a wajen:
2. Fault Diagnosis Technology for Automatic Reclosers
Sistem na fault diagnosis na reclosers mai zurfi yana da kyau a fault diagnosis na controllers na reclosers mai zurfi ga 10kV overhead lines. Bayan "circuit breaker part" na line ta kawo da recloser controller, an jiye different types of simulated fault currents da recloser controller through software control, kuma an yi "opening and closing" operations according to the commands of the controller. Response action na recloser controller to current changes an rubuta. Through software analysis, it is determined whether the controller can correctly respond to the fault situation and whether the response meets the requirements. Various fault test analyses can be performed, enabling the automatic detection of recloser controller faults.
Sistem na fault diagnosis na reclosers mai zurfi yana kawo da models na reclosers mai zurfi da universal or specially-made interfaces. Performance na reclosers mai zurfi an kawo da professional analysis software, kuma all control and testing are achieved through software. System characteristics na fault diagnosis na reclosers mai zurfi shine:
Sistem an yi amfani da high-precision current source, wanda yana da advantages na high precision, high resolution, and reliable performance, improving accuracy of simulated current output. Through software, parameters such as the waveform, amplitude, rise time, duration, and fall time of the current can be comprehensively controlled, enhancing authenticity of fault current simulation. At the same time, information such as the current waveform and amplitude can be displayed in real-time, enabling more effective analysis.
Sistem an yi amfani da universal interface, wanda yana da kyau a "plug-and-play" on-site operation through the universal interface, realizing transmission of signals and data.
Database establishment: The ampere-second characteristic is the inverse-time relationship curve between the opening time and the interrupting current of a recloser, including fast TCC (Time-Current Characteristic) and slow TCC. Currently, for automatic reclosing.
Database establishment: The ampere-second characteristic is an inverse-time curve for recloser opening time vs. interrupting current, covering fast and slow TCC. Currently, automatic reclosing controller ampere-second curves mainly are Cooper, IEEE (US), and IEC standards. The system's analysis software has built-in databases for easy analysis.
3. Conclusion
Technology na fault diagnosis na reclosers mai zurfi can analyze various abnormal conditions, including abnormal instantaneous reclosing function, abnormal TCC (Time-Current Characteristic) curve, abnormal over-current protection function, abnormal reclosing interval test, and abnormal closing interlock. This technology represents the development trend of transitioning automatic recloser maintenance from traditional scheduled maintenance to advanced condition-based maintenance. It enables comprehensive analysis and diagnosis of the control part of reclosers, significantly enhancing the technical level of recloser condition-based maintenance. It plays a crucial role in preventing distribution network transmission line accidents.
