Pagsisikap ng mga Reactor sa Paghahandog ng Long-Distance Transmission Grids: Mga Solusyon sa Kompanyon ng Reactive Power at Pagpapababa ng Overvoltage

17yrs 700++ staff 108000m²+m² US$150,000,000+ China

Application Scenario:
Sobrang kapasitibong pag-load ng power sa mga long-distance transmission lines ng 500kV substations.

Problem Background:
Sa mga long-distance transmission lines na may rating na 500kV at higit pa, ang epekto ng capacitive line-to-ground ay malaking bahagi. Kapag gumagana sa ilang load o walang load, ang mga linya na ito ay nagbibigay ng malaking capacitive charging power (capacitive reactive power). Ang sobrang power na ito ay nagresulta sa:

Power-frequency overvoltage: Tumataas ang tensyon ng linya nang malaki, posibleng lumampas sa insulation withstand levels ng mga equipment at nagpapanganib sa seguridad ng grid.
Voltage fluctuations and stability issues: Nagbabawas ng kalidad ng power, nagdadagdag ng line losses, at nagpapahina sa capacity ng transmission ng linya.
System reactive power imbalance: Nagpapahirap na panatilihin ang voltage ng sistema sa qualified ranges.

Upang tugunan ang mga isyung ito, kailangang mag-install ng high-performance shunt reactors sa mga key nodes (halimbawa, sa parehong dulo o mid-line 500kV substations) para sa inductive reactive power compensation, na sumasipsip ng sobrang capacitive charging power.

Core Solution: BKLG-500 Shunt Reactors
Para mabawasan ang sobrang charging power sa 500kV long-distance lines, inirerekomenda namin ang paggamit ng BKLG-500 oil-immersed shunt reactors with iron cores bilang core solution.

Key Equipment Features and Technical Advantages:

Efficient Absorption of Capacitive Reactive Power:

Rated Capacity: 60 Mvar. Mahusay na tugon sa mga pangangailangan ng charging power ng long-line, na susing sumasipsip ng sobrang capacitive reactive power na ginagawa ng linya.
Function: Balances line reactive power, confines voltage fluctuations within safe and stable ranges, and significantly suppresses power-frequency overvoltage during light/no-load conditions.

Exceptional Reliability and Overload Capacity:

Temperature Rise Limit: 55°C (under rated conditions). Utilizes advanced insulation materials and cooling design to ensure long-term operational reliability.
Overload Capability: Can operate continuously for 30 minutes at 110% of rated capacity. This design effectively withstands system short-term surges or abnormal conditions (e.g., load rejection), providing an additional safety margin for the grid and ensuring equipment security.

Ultra-Low Noise and Vibration Design:

Special Magnetic Shunt Structure: Optimizes core magnetic circuit design, drastically reducing vibration and noise caused by core magnetostriction.
Guaranteed Sound Pressure Level: Operating noise ≤ 65 dB(A). This performance significantly surpasses conventional products, meeting stringent environmental requirements, making it especially suitable for substations near residential areas or noise-sensitive zones.

Robust Construction and Stable Performance:

Iron Core Design: Offers structural robustness, high mechanical strength, strong short-circuit withstand capability, low no-load loss, and excellent capacity adjustment characteristics.
Oil-Immersed Cooling: High heat dissipation efficiency, superior insulation performance, easy maintenance, and proven reliable technology.

Scheme Benefits:

Effectively suppresses power-frequency overvoltage: Maintains line voltage within safe limits, protecting critical equipment like transformers, circuit breakers, and surge arresters.
Significantly improves voltage stability and quality: Balances system reactive power, reduces voltage fluctuation range, and enhances power supply reliability and quality.
Increases line transmission capacity: Reduces limitations on transmission capacity caused by excessively high voltage.
Enhances system operational safety margin: Robust overload capability copes with contingencies.
Meets environmental requirements: Low-noise design minimizes impact on surrounding environment.

Implementation Results:

Significant reduction in voltage fluctuations: Voltage fluctuation range for the associated line was successfully controlled to within ±2%, compared to ±8% pre-implementation.
Effective elimination of overvoltage risk: Power-frequency overvoltage under light load and no-load conditions was effectively limited below equipment safety thresholds.
Stable and reliable operation: The BKLG-500 reactors have operated stably since commissioning. Measured noise values are significantly lower than guaranteed levels, earning high user recognition.