CT da Grounding Switch Magnetic Circuit Reuse Integrated Solution: Enabling Compact GIS Substation Construction
Background
Na ƙarfiyar ƙananan gwamnati masu tashin kula, yadda ake da take da kyau a kan al'adun duka shi ne ya zama na gaba. Wasu aikinsu GIS suna yi tasiri mai yawa ga tsaye saboda hanyoyin abubuwa (CTs) da gasar gidaje, wanda ke jin da suka zama baki daya a cikin takardun fadada muhimmin birnin.
Solution: Modular Integrated Design
Akwai nasara aikin da ya kunshi tasirin CT zuwa gasar gidaje, wanda ke magance matsayinta da yawa:
- Space-Efficient Reuse:
- Embedded CT Coil: An fitowa insulator CT na musamman, ta haka an saka coil mai yawan cutar daidai a kan kofin gasar gidaje.
- GIS Enclosure Magnetic Circuit Closure: An yi amfani da kofin metal na yawan daidai a kan aikin GIS wajen bayyana tsaye CT, wanda ke magance tasirin yawan daidai. Yadda ake da take da kyau a kan tsaye ya zama daidai.
- Precise Magnetic Circuit Compensation:
- Dual-C Laminated Silicon Steel: Don in ba da tasirin yawan daidai a kan aikin (estimated linearity deviation ≤5%), an amfani da silicon steel sheet laminated modules na 0.23mm da yawan daidai.
- Directed Magnetic Flux Guidance: Aikin C-shaped symmetrical ya magance yawan daidai, wanda ke taimakawa waɗannan aikin za su iya haɗa a kan ƙarin daidai (≤0.5%) a kan lokacin da suka sama da lokacin da suka fiye (up to 40kA peak), wanda ke magance Class 0.2S accuracy requirements.
- Contact Synchronization Monitoring:
- Dual Hall-Effect Sensor Synchronization: An fitowa sensor arrays Hall-effect da yawan daidai a kan nodes masu tashin gasar gidaje.
- State Synchronized Output: An samun yanayin gasar gidaje a kan lokacin da suka sama da lokacin da suka fiye, wanda ke magance yawan daidai a kan lokacin (≤1ms) da signal phase current daga CT.
Core Scenario Value: Urban Compact GIS Substations
- Spatial Compression Breakthrough: An saukar da take da kyau a kan tsaye aikin da 1.2 meters, wanda ke magance takarda daidai. Tsaye birnin an saukar da 30% (e.g., 220kV GIS distribution area).
- Lifespan Consistency Design: Aikin mai ƙungiyar ya saukar da tashin transmission. CT da gasar gidaje suna ƙunshi abubuwan da suke yi aiki (e.g., operating rod bearing system). An nuna ƙarin da suka yi aiki a 10,000 full-capacity open/close operation cycles, wanda ke magance mechanical lifespan targets synchronized.
- Intelligent O&M Enablement: Yanayin Hall position signals da data CT a kan lokacin daidai (≤1ms) ya magance tushen data masu aiki don in ba da rarrabe a kan aikin gasar gidaje da karfin aikin da suka yi aiki.
Summary of Technical Advantages
|
Dimension |
Traditional Solution |
This Integrated Solution |
Key Improvements |
|
Equipment Structure |
CT and grounding switch independent |
Embedded CT in operating rod, reused enclosure magnetic circuit |
Vertical height reduced by 1.2m |
|
Footprint |
Large base footprint |
Optimized overall layout |
Saves 30% area |
|
Measurement Performance |
Susceptible to proximity effects |
Dual-C silicon steel compensates asymmetric magnetic field |
Steady/Transient accuracy ≤0.5% |
|
Lifespan Coordination |
Independent parts, unsynchronized lifespan |
Shared transmission chain, optimized design |
Synchronized operational lifespan to 10,000 cycles |
|
Condition Monitoring |
Position and current monitoring separate |
Hall sensors provide real-time synchronized phase data |
Provides millisecond-level operational transient data |
