Pagsisikap ng mga Reactor sa Mahabang Distansyang Grid ng Transmision: Solusyon para sa Kompensasyon ng Reactive Power at Pagpapahina ng Overvoltage

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

Application Scenario:
Masyadong kapasitibong kapangyarihan ng pagbabaril sa mga linya ng mahabang layunin na 500kV substations.

Problem Background:
Sa mga linya ng mahabang layunin na may rating na 500kV at iba pa, ang epekto ng kapasitibong pagbabaril mula sa linya patungo sa lupa ay malaking bahagi. Kapag gumana ito sa ilang load o walang load, ang mga linyang ito ay nagbibigay ng malaking kapasitibong kapangyarihan ng pagbabaril (kapasitibong reaktibong kapangyarihan). Ang masyadong kapangyarihan na ito ay nagresulta sa:

Power-frequency overvoltage: Ang tensyon ng linya ay lumalaki nang significante, posibleng lumampas sa lebel ng insulation ng mga kagamitan at panganib sa seguridad ng grid.
Voltage fluctuations and stability issues: Nagdudulot ng pagbaba ng kalidad ng kuryente, pagtaas ng pagkawala ng linya, at paglimita sa kapasidad ng paghahatid ng linya.
System reactive power imbalance: Nagdudulot ng hirap sa pag-maintain ng tensyon ng sistema sa mga qualified ranges.

Upang harapin 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 inductibong reaktibong kapangyarihan compensation, na sumisipsip sa excess kapasitibong kapangyarihan ng pagbabaril.

Core Solution: BKLG-500 Shunt Reactors
Para mapabuti ang masyadong kapangyarihan ng pagbabaril sa 500kV mahabang linya, 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. Naka-match nang maingat sa mga pangangailangan ng charging power ng long-line, na epektibong sumisipsip sa excess kapasitibong reaktibong kapangyarihan na gawa 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.