Based on the study of the harmonic suppression on DC side of the multi-pulse rectification system,a software platform is established in Matlab environment.The phase-shift angle is studied from the aspects of system st...Based on the study of the harmonic suppression on DC side of the multi-pulse rectification system,a software platform is established in Matlab environment.The phase-shift angle is studied from the aspects of system stability and economy,analyzing the effects of phase-shift angle on the input-side line current,the output-side voltage ripple,the equivalent capacity of autotransformer and other auxiliary devices in 12-pulse rectifier system.The software platform can complete the analysis only by inputting the initial conditions,eliminating the derivation of the intermediate formula and reducing the complexity of the system analysis,and have good scalability.The simulation results show that the system can effectively analyze the influence of phase angle on 12-pulse star-connected transformer.展开更多
A hydrogen compressed air energy storage power plant with an integrated electrolyzer is ideal for large-scale,long-term energy storage because of the emission-free operation and the possibility to offer multiple ancil...A hydrogen compressed air energy storage power plant with an integrated electrolyzer is ideal for large-scale,long-term energy storage because of the emission-free operation and the possibility to offer multiple ancillary services on the German energy market.This paper defines analyzes such a storage concept and conducts an extensive comparison with four additional storage concepts based on various criteria.The results show that the combination of storing compressed air and hydrogen offers a higher efficiency than storing only hydrogen and lower specific investment costs than storing only compressed air.This result is confirmed with analysis of the optimal sizing of each power plant component for simultaneous participation on multiple energy markets with a linear optimization dispatch mode.The hydrogen compressed air energy storage(HCAES)power plant can utilize more revenue possibilities than a hydrogen energy storage because of the higher round-trip efficiency and the combination of the air compressor and the integrated electrolyzer during charging mode.The integration of the electrolyzer,however,offers a couple of challenges itself because of the highly flexible operation mode.A new concept for the controllable 24-pulse diode-thyristor rectifier of the electrolyzer is presented,that uses mostly common components while offering little to no grid harmonics and a long lifetime.The flexible integrated electrolyzer allows for the 4-quadrant operation of the storage power plant.展开更多
基金National Natural Science Foundation of China(Nos.51367010,51867012)Lanzhou City Talent Innovation and Entrepreneurship Science and Technology Program Subsidy(No.2017-RC-51)。
文摘Based on the study of the harmonic suppression on DC side of the multi-pulse rectification system,a software platform is established in Matlab environment.The phase-shift angle is studied from the aspects of system stability and economy,analyzing the effects of phase-shift angle on the input-side line current,the output-side voltage ripple,the equivalent capacity of autotransformer and other auxiliary devices in 12-pulse rectifier system.The software platform can complete the analysis only by inputting the initial conditions,eliminating the derivation of the intermediate formula and reducing the complexity of the system analysis,and have good scalability.The simulation results show that the system can effectively analyze the influence of phase angle on 12-pulse star-connected transformer.
基金supported by the Lower Saxony State Ministry of Science and Culture and Volkswagen Stiftung within the innovation lab“Wasserstoffregion Nord-West-Niedersachsen(H2-ReNoWe)”.
文摘A hydrogen compressed air energy storage power plant with an integrated electrolyzer is ideal for large-scale,long-term energy storage because of the emission-free operation and the possibility to offer multiple ancillary services on the German energy market.This paper defines analyzes such a storage concept and conducts an extensive comparison with four additional storage concepts based on various criteria.The results show that the combination of storing compressed air and hydrogen offers a higher efficiency than storing only hydrogen and lower specific investment costs than storing only compressed air.This result is confirmed with analysis of the optimal sizing of each power plant component for simultaneous participation on multiple energy markets with a linear optimization dispatch mode.The hydrogen compressed air energy storage(HCAES)power plant can utilize more revenue possibilities than a hydrogen energy storage because of the higher round-trip efficiency and the combination of the air compressor and the integrated electrolyzer during charging mode.The integration of the electrolyzer,however,offers a couple of challenges itself because of the highly flexible operation mode.A new concept for the controllable 24-pulse diode-thyristor rectifier of the electrolyzer is presented,that uses mostly common components while offering little to no grid harmonics and a long lifetime.The flexible integrated electrolyzer allows for the 4-quadrant operation of the storage power plant.
