Isa kini ang Pagsabot sa Direkta alang sa Modernisasyon sa Legacy AIS

2yrs + staff 1000+m² US$300,000,000+ China

Pahayag ng Puno: Nagsasalubong ka ba sa pagtanda ng mga tradisyonal na Current Transformers (CTs) at Voltage Transformers (VTs) sa Air-Insulated Substations (AIS)? Ang modernisasyon ay hindi nangangahulugan ng pagbabago ng buong substation. Ang CIT (Combined Instrument Transformer) ay in disenyo bilang isang matibay at direktang kapalit para sa iyong mga legacy units. Nagpapanatili ito ng umiiral na mga pundasyon at busbar connections, nagbibigay ng kritikal na analog compatibility ngayon habang nagbibigay ng makinis na paglipat sa iyong digital na hinaharap. Pinag-uunlad ang ruggedness at field-proven reliability, ito ay nagtatayo ng tiwala para sa pagpalit ng mga naitatag na teknolohiya.

Ang Hamon: Pag-modernize ng Maturing na AIS Infrastructure
Ang mga ari-arian ng AIS ay bumubuo ng backbone ng global na transmission at distribution networks. Libu-libong lugar ang sumasalamin sa CTs at VTs na may edad na halos dekada. Ang pagpalit sa kanila ay nagbibigay ng mga unique na hamon:

High Cost ng Structural Change: Ang pagwasak ng mga pundasyon, pagbabago ng mga busbars, o pagpapalawak ng mga istraktura ay mahal at nagdudulot ng pagkakabalisa.
Relay Compatibility Dependency: Ang mga critical na protection at metering schemes ay umaasa sa naitatag na 5A/1A at 110V/100V analog inputs.
Migration Strategy: Ang immediate wholesale replacement na may digital-only solutions ay madalas impractical; mahalaga ang phased approach.
Trust Hurdle: Ang mga legacy CTs/VTs ay may proven track record. Ang bagong teknolohiya ay dapat ipakita ang katumbas na reliabilidad sa harsh field conditions upang makamit ang pagtanggap.

Direktang Kapalit, Dual Outputs, Proven Reliability
Ang CIT na ito ang sagot, na idisenyo mula sa ground up bilang direktang, retrofittable upgrade para sa conventional CTs at VTs sa AIS environments:

Direktang "Drop-In" Retrofit Design (Core Enabler):

Precision Footprint Matching: Inihanda ang sukat at masa upang perpektong mapagana ang orihinal na CT/VT units na papalitan.
Identical Mounting & Busbar Interfaces: Gumagamit ng umiral na foundation bolts at tumutugon sa umiral na busbar tap dimensions/configurations (halimbawa, clamp type, bolt holes). Walang cutting, welding, o busbar modifications required.
Standard Terminal Box Placement: Ang secondary connections ay natatapos sa mga lokasyon na kilala ng mga technician, na posisyon tulad ng orihinal.
Significant Installation Advantages:

Radically Reduced Downtime: Ang installation windows ay bumababa mula sa araw hanggang oras.
Eliminated Civil Costs: Ito ay iwas sa concrete work, structural modifications.
Minimized Risk: Simplified engineering, mas simple na lift plan, nabawasan ang potensyal na mga error sa busbar work.

Hybrid Output System: Supporting Today & Tomorrow:

Legacy Analog Interface:

Current Outputs: Standard burden-compatible outputs: 1A (5VA typical) at 5A (15VA o 30VA typical) bawat protection/metering core.
Voltage Outputs: Standard ratio-compatible outputs: 100V (Line-Neutral) at 110V (Line-Neutral), angkop para sa relays at meters. 110V (Line-Line) option available kung kinakailangan.

Modern Digital Interface:

Standards-Based: Digital output compliant sa IEC 61850-9-2LE Sampled Values (SV) over Ethernet.
Advanced Capabilities: Nagbibigay ng merged, synchronized, high-resolution sampled current at voltage data, nagbibigay ng bagong posibilidad para sa protection, control, at condition monitoring sa loob ng digital substation architectures.

Phased Migration Pathway: Ang Utilities ay maaaring:

Phase 1: Konektado ang umiiral na analog protection/control systems sa CIT. Ang critical functions ay nananatiling walang pagbabago.
Phase 2: Route the digital SV stream to new Intelligent Electronic Devices (IEDs) or gateways for advanced applications or new bays.
Phase 3: Gradually decommission legacy IEDs as digital systems prove reliable, minimizing risk and spreading investment.

Ruggedized Design for Proven Field Reliability (Building Trust):

Extreme Environment Ready: Mga komponente na pinili at sealed upang makatakas sa temperature extremes (-40°C hanggang +70°C operational), mataas na humidity (IP67 ingress protection standard), salt fog (C5-M corrosion resistance), at severe pollution levels.
Seismic Performance: Idisenyo upang tugunan ang IEC 61869/IEEE C37 seismic requirements na angkop sa installation zone.
Advanced Insulation System: Ginagamit ang solid core insulation (halimbawa, SF6-free dry design with silicone shed composite housing, o SF6 gas) na optimized para sa stability at long life under switching surges at temporary overvoltages (TOVs).
Thermal & Overload Stability: Generously rated primary conductors at secondary windings na nagbibigay ng performance under fault conditions at overload scenarios. Proven thermal stability test compliance.
Reliability by Design: Gumagamit ng robust sensor technology (halimbawa, optimized Low-Power Coreless CTs/LPCTs, resistive/capacitive voltage dividers) na may minimal active electronics. Focus on simplicity sa critical paths.
Validation Focus: Extensive type testing (IEC 61869, IEEE C57.13) plus rigorous pre-deployment pilot testing sa actual grid environments sa iba't ibang operating conditions upang makamit ang utility confidence at ipakita ang operational equivalence sa legacy technologies.

Technical Specifications Overview:

Feature	Specification
Primary Voltage	Matched sa umiiral na application (halimbawa, 72.5kV - 550kV)
Primary Current	Matched sa umiiral na busbar rating
Analog Outputs	1A/5A CT Cores, 100V/110V VT Outputs (Std ratios)
Digital Output	IEC 61850-9-2LE SV over Fiber/Ethernet
Accuracy (Analog)	Typically 0.2 / 5P for VT, 5P / 5TPE for CT cores
Accuracy (Digital)	Typically Class 0.2 (Meas), 5TPE (Prot)
Environmental	-40°C hanggang +70°C Ambient, IP67, C5-M Corrosion Res.
Seismic	Zone 3 / Zone 4 per IEEE 693
Standards	IEC 61869, IEEE C57.13, Local Utility Standards

Value Proposition: Reducing Risk & Cost for Grid Operators

Radically Lower Installation Cost & Time: Eliminates structural modifications at complex busbar work. Commissioning faster.
De-risked Modernization: Maintains compatibility with existing, trusted protective relaying during transition. Proven analog reliability.
Future-Proof Investment: Built-in digital capabilities ensure readiness for digital substations without immediate obsolescence.
Enhanced Resilience: Rugged design offers longevity comparable to conventional CTs/VTs, minimizing future replacement cycles.
Reduced Substation Footprint: Replaces two conventional devices with one, improving buswork clarity and freeing space.
Unified Data Source: Single device provides synchronized current and voltage data, improving measurement correlation and enabling advanced analytics.