Adapt to power electronic transformer uneven and non - linear load

• Main Authors: SHUAI ZHIKANG, CHEN MING, CHU HONGBO, WANG KAI, ZHOU WEI, GE JUN, LAN ZHENG, ZHOU KE, LIU GUANGSHI, YANG LICAI, WANG XIAOMING, GUO MIN, SUN ZHIYUAN
• Format: Patent
• Language: English
• Published: 16.12.2015
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; SYSTEMS FOR STORING ELECTRIC ENERGY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The utility model provides an adapt to power electronic transformer uneven and non - linear load, an adapt to power electronic transformer uneven and non - linear load, power electronic transformer topological structure include input stage, middle isolation level and output stage, the output stage is the dc -to -ac converter of three -phase four -leg structure, preceding three -phase bridge arm adopts based on the output voltage outer loop of PIR controller with based on endocyclic pair of closed -loop control tactics of inductive current of PI controller, four -bridge -arm adopts the well line current independent control ware based on PR. The utility model discloses the control outer loop adopts proportional integral resonance voltage controller, can effectively solve dq rotating coordinate system under the PI controller to the limited problem of of ac gain, reduce steady state error, the control inner ring adopts pi controller, has improved the dynamic behavior of system effectively, four -bridge -arm independently adopts improvement proportion resonance controller, can carry out the effective control to base frequency unbalance current.