种高电能质量输出的电力电子变压器及其控制方法

• Format: Patent
• Language: Chinese
• Published: 05.04.2017
• 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

本发明提供了种高电能质量输出的电力电子变压器及其控制方法，所述的电力电子变压器拓扑结构包括输入级、中间隔离级和输出级，输出级为三相四桥臂结构的逆变器，前三相桥臂采用基于PIR控制器的输出电压外环和基于PI控制器的电感电流内环的双闭环控制策略，第四桥臂采用基于比例谐振的中线电流独立控制方法；本发明利用频域理论中频率特性曲线和根轨迹等相关方法对双闭环PIR-PI控制器参数进行分频段整定，有效地提高稳定性的同时兼顾系统的稳态误差和鲁棒性要求。 The invention provides a power electronic transformer enabling the high quality of electric energy output, and a control method thereof. A topologic structure of the power electronic transformer includes an input stage, an intermediate isolation stage and an output stage. The output stage is an inverter of a three-phase four-leg structure, wherein the previous three phase legs adopts a dual-closed loop control strategy based on an output voltage outer loop of a PIR controller and an inductance current inner loop of a PI controller, and the fourth leg adopts a neutral current independent control method based on proportion resonance. The frequency characteristic curve and root locus of the frequency domain theory and other relevant methods are utilized to carrying out frequency division setting