Akwụkọ Nsogbu dị Mmadụ nke Ọma maka Ụfọdụ AIS Na-akpali

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

Sammarya: Air-Insulated Substations (AIS) na Current Transformers (CTs) da Voltage Transformers (VTs) masu shekaru daban-daban sun fi yawa? Zan iya ba tushen wannan substation. CIT (Combined Instrument Transformer) an gina shi a matsayin ƙaramin, drop-in replacement don cikakken abubuwan da aka. An yi amfani da foundation da busbar connections da suka fi sani, maimakon haka an ba da analog compatibility today kuma ya haɗa a yi digital future kan. An yi amfani da ruggedness da field-proven reliability, wanda ke zama ina ƙara amanna don in bude wasu tushen da suka fi sani.

The Challenge: Modernizing Mature AIS Infrastructure
AIS assets sun samun gwamnati na global transmission da distribution networks. Alfada da suka yi amfani da CTs da VTs masu shekaru daban-daban suna koyarwa. In bude su suna da abubuwa masu sauti:

High Cost of Structural Change: In rubuta foundation, in yi nasarar busbars, ko in yi nasarar structures ba tare da lalace mai kwayar da yawa.
Relay Compatibility Dependency: Protection da metering schemes suna yi amfani da 5A/1A da 110V/100V analog inputs da suka fi sani.
Migration Strategy: In bude da digital-only solutions ba tare da lalace mai kwayar da yawa; haka ina bukatar a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani da a yi amfani......
Trust Hurdle: CTs/VTs masu shekaru suna da tarihin yadda ake amfani. Wasu tushen kai tsaye suna bukata in ba da amanna daidai don in yi amfani da harsh field conditions.

Direct Replacement, Dual Outputs, Proven Reliability
Wannan CIT shi ne amsa, an gina shi a matsayin ƙaramin, retrofittable upgrade don conventional CTs da VTs a cikin AIS environments:

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

Precision Footprint Matching: Dimensions da mass suna gina su don in yi amfani da original CT/VT units da aka bude.
Identical Mounting & Busbar Interfaces: An yi amfani da existing foundation bolts kuma an yi amfani da existing busbar tap dimensions/configurations (misali, clamp type, bolt holes). Ba a tabbatar da cutting, welding, ko busbar modifications ba.
Standard Terminal Box Placement: Secondary connections sun karkashin kan a wurare da technicians sun sanar da su, wanda ke kamar originals.
Significant Installation Advantages:

Radically Reduced Downtime: Installation windows suna koyarwa daga days zuwa hours.
Eliminated Civil Costs: An yi amfani da concrete work, structural modifications.
Minimized Risk: Simplified engineering, less complex lift plan, reduced potential for errors during busbar work.

Hybrid Output System: Supporting Today & Tomorrow:

Legacy Analog Interface:

Current Outputs: Standard burden-compatible outputs: 1A (5VA typical) and 5A (15VA or 30VA typical) per protection/metering core.
Voltage Outputs: Standard ratio-compatible outputs: 100V (Line-Neutral) and 110V (Line-Neutral), suitable for relays and meters. 110V (Line-Line) option available where required.

Modern Digital Interface:

Standards-Based: Digital output compliant with IEC 61850-9-2LE Sampled Values (SV) over Ethernet.
Advanced Capabilities: Provides merged, synchronized, high-resolution sampled current and voltage data, enabling new possibilities for protection, control, and condition monitoring within digital substation architectures.

Phased Migration Pathway: Utilities can:

Phase 1: Connect existing analog protection/control systems to the CIT. Critical functions remain unchanged.
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: Components selected and sealed to withstand temperature extremes (-40°C to +70°C operational), high humidity (IP67 ingress protection standard), salt fog (C5-M corrosion resistance), and severe pollution levels.
Seismic Performance: Designed to meet IEC 61869/IEEE C37 seismic requirements suitable for the installation zone.
Advanced Insulation System: Utilizes solid core insulation (e.g., SF6-free dry design with silicone shed composite housing, or SF6 gas) optimized for stability and long life under switching surges and temporary overvoltages (TOVs).
Thermal & Overload Stability: Generously rated primary conductors and secondary windings ensure performance under fault conditions and overload scenarios. Proven thermal stability test compliance.
Reliability by Design: Employs robust sensor technology (e.g., optimized Low-Power Coreless CTs/LPCTs, resistive/capacitive voltage dividers) with minimal active electronics. Focus on simplicity in critical paths.
Validation Focus: Extensive type testing (IEC 61869, IEEE C57.13) plus rigorous pre-deployment pilot testing in actual grid environments under varied operating conditions to build utility confidence and demonstrate operational equivalence to legacy technologies.

Technical Specifications Overview:

Feature	Specification
Primary Voltage	Matched to existing application (e.g., 72.5kV - 550kV)
Primary Current	Matched to existing 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 to +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 and 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.