Sagot ng Voltage Transformer: Paghahandang Transient para sa mga IIEE-Business Renewable Energy Stations

Ⅰ. Background at mga Sakit ng Ulo​
Ang mga renewable energy stations (photovoltaic/wind power) ay nakakaranas ng mga komplikadong transient processes dahil sa malawakang paggamit ng mga power electronic devices, kabilang dito ang inverter shutdown surges, broadband resonance, at DC component interference. Ang mga conventional PTs/CTs ay limitado sa bandwidth, response speed, at anti-saturation capability, kaya hindi sila makakapagtamo ng tumpak na transient voltage waveforms. Ito ay nagdudulot ng protection misoperations, hirap sa fault location, at pabababa ng lifespan ng mga equipment.

​Ⅱ. Transient Response Monitoring Solution para sa Renewable Energy Stations​
Ang solusyon na ito ay espesyal na disenyo para sa mga transient processes sa renewable energy stations, na may core capability na wide-bandwidth, high-precision voltage measurement mula DC hanggang 5kHz.

• ​Teknikal na Focus: Wide-Band Measurement Capability (DC-5kHz)​​
  Nagbibigay ng breakthrough sa bandwidth limitations ng conventional transformers, kasama ang mga key transient signals tulad ng sub-synchronous oscillation (SSO), switching-frequency harmonics, high-frequency resonance, at slow DC offsets.
• ​Mga Key Technologies​
  Resistive-Capacitive Divider + Rogowski Coil Integration:​​
   • Resistive-Capacitive Divider: Nagbibigay ng precise wide-band voltage measurement (10Hz-5kHz) na may mabilis na transient response at matibay na anti-interference.
   • Rogowski Coil: Nagsusukat ng high-frequency current rate-of-change (di/dt). Ang integrated complementary signals ay bumubuo ng buong wide-band voltage signal, na nagpapahaba ng effective bandwidth hanggang 5kHz at lumalampas sa single-sensor limitations.
   ​0.5Hz Low-Frequency Phase Compensation Circuit:​​
  Para sa ultra-low-frequency sub-synchronous oscillations ng sistema (hal. <1Hz), ginagamit ang dedicated compensation algorithms at low-noise analog circuits upang panatilihin ang phase error <0.1° sa 0.5Hz, na nagse-secure ng authenticity ng phase at accuracy ng amplitude ng sub-synchronous components.
  Anti-DC Component Saturation Design (120% DC Offset):​​
  Ginagamit ang high-Bsat nanocrystalline magnetic cores kasama ang active bias compensation technology. Nakakatipon ng sustained DC offsets hanggang 120% ng rated voltage nang walang saturation, na nagpapahintulot na maiwasan ang distortion ng measurement na dulot ng DC components mula sa inverter faults o grid asymmetry.
• ​Dynamic Performance Specifications​
  Step Response Time: <20μs – Sinisigurado ang mabilis na capture ng instantaneous overvoltages na dulot ng switching actions (hal. IGBT turn-off).
  Harmonic Measurement Accuracy: Hanggang 51st order (2500Hz@50Hz) – THD accuracy ±0.5% – Nakakasunod sa requirements para sa precise power quality assessment at resonance analysis.
  Transient Overvoltage Recording Resolution: 10μs/point (equivalent to 100ksps sampling) – Nagbibigay ng high-resolution waveform recording para sa millisecond-level transient events (hal. lightning strikes, ground faults).
• ​Mga Application Scenarios​
  PV Inverter Turn-off Overvoltage Monitoring: Tumpak na nagsusukat ng voltage spikes sa panahon ng IGBT turn-off (dv/dt >10kV/μs), nalokasyon ang pinagmulan ng reflected wave overvoltages, at nago-optimize ng RC snubber parameters at cable layout.
  Wind Farm Collection Line Resonance Analysis: Nakakapag-capture ng broadband resonance (hal. 2-5kHz) na dulot ng interaction sa pagitan ng long cable distributed capacitance at SVGs/generator sets. Nagbibigay ng characteristic harmonic spectra at attenuation characteristics upang gabayan ang active damping parameter tuning.
  Sub-Synchronous Oscillation (SSO/SSR) Monitoring: Tumpak na nare-record ang phase at amplitude changes ng sub-synchronous oscillation voltages sa range ng 0.5-10Hz, nagbibigay ng core data para sa localization at suppression strategies ng oscillation source.
  Protection Misoperation Analysis Due to DC Components: Nagbibigay ng tumpak na fundamental component measurements kahit sa significant DC offset conditions, na nagpapahintulot na maiwasan ang misjudgments ng protection device dulot ng transformer saturation.