Íomháin réiteach do fadhbanna coitianta i nRing Main Units SF6 (RMUs)
Inmheachtaí Iomlán do Fadhbanna Coitianta i gComharp SF6 (RMUs)
Is é an oibriú stiúrtha SF6 RMUs ardsholadacha ríthábhachtach don slándú na gréasáin. Chun fadhbanna tréitheacha a réiteach atá le feiceáil le linn oibriú fada, agus bunaithe ar cleachtais tionscail agus spéicí teicneolaíochta, tá na réiteacháin córasacha seo molta:
I. Plean Forbartha Iomlán um Imtharraingt Gais
- Feiniméan & Riscoil:
- Imtharraingt SF6 gas laghaíonn neart dielectric (bogann an spás buille síos thar 30% nuair is lú é an bpá séasta ná 0.4MPa).
- Ionsaí arc decompositions (mar shampla, SF4, SOF2) cuireann tionchar ar shábháilteacht na foirne.
- Córas Cosanta Proactach:
|
Cúnamh |
Caighdeán |
Tréimhse / Modh |
|
Laser Imaging Leak Detection |
DL/T 1145 |
Census bliantúil + Seantais speisialta tar éis báistí |
|
Dual-Channel Density Relay Monitoring |
IEC 62271 |
Socruithe carúil réalaí (0.55MPa ag 20°C) |
|
Complete Sealing Component Retrofit |
GB/T 11023 |
Úsáid O-rings fluororubber + seals metal bellows |
|
Emergency Response Drills |
Q/GDW 1799.2 |
Drills tri-mhíonna (lena n-áirítear úsáid apparátas análaíochta páirtíochta dearfach) |
II. Stratéis chun Meacnaischíochtaí Oibriúcháin a Díoladh
- Mechanisms Fadhb:
- Mechanism sticking/jamming (80% mar gheall ar hardú greasa).
- Micro-switch failure.
- Operation refusal/maloperation caused by secondary wiring oxidation.
- Plean Meastóireachta Deagh:
- Seirbhís Bliantúil: Comhthaobh dhá chuid cheannródaí: 1) Disassembly and refurbishment of the operating mechanism; 2) Coil resistance testing. These tasks enable timely assessment of the equipment's fundamental condition.
- Intelligent Monitoring: Focuses on in-depth analysis of operational status, specifically including: 1) Analysis of open/close coil current waveforms; 2) Assessment of the energy storage motor status. This achieves precise control over equipment operation.
- Preventive Testing: Utilizes specialized instruments to ensure test accuracy, employing mechanical characteristic testers and micro-ohm meters for contact resistance testing. This provides robust data support for safe and stable operation.
III. Cóiríocht agus Rialú Réidhteachta & Tóir
- Uchtálacha Cosanta Iomlán:
- Insulation Refurbishment:
- Apply moisture-proof RTV coating to epoxy barrel surfaces (withstands 40% higher voltage).
- Replace porcelain bushings with silicone rubber bushings (impact resistance strength increased by 3 times).
- Thermal Management Upgrade:
Heat Dissipation Power = 6.5×10⁻³×(T_cabinet - 25)³ // Optimization Measures:
- Install IP55 centrifugal fans at the cabinet top (ΔT reduced by 8℃).
- Silver plating treatment of copper busbars (contact resistance reduced by 35%).
- Embed heat pipe radiators into the contact assemblies.
IV. Construction of Intelligent Operation & Maintenance (O&M) System
|
Technology Module |
Function Implementation |
Benefit |
|
UHF Partial Discharge (PD) Monitoring |
Captures 300MHz-1.5GHz signals |
Provides 3-month early warning for insulation defects |
|
Pressure Cloud Map Analysis |
Leakage prediction based on temperature compensation |
Increases leak location efficiency by 70%+ |
|
Mechanical Life Assessment |
Stress analysis based on cumulative switching operations |
Achieves >90% mechanism failure prediction rate |
Validation via Typical Case
After implementing this solution at a State Grid 220kV substation:
▶ Annual SF6 leakage rate dropped from 0.8% to 0.05%.
▶ Number of mechanical failures decreased by 82% (from 2021 to 2023).
▶ Peak temperature rise reduced from 75K to 48K (IEC 60298).
Key O&M Implementation Points
- Establish a full life-cycle equipment database (including spare parts life warnings).
- Promote live detection techniques to replace scheduled outage testing.
- Deepen the application of Condition-Based Maintenance (CBM) decision systems.
