| 引用本文: | 张明锐,徐而峰.P-Q模式固态变压器的工作特性分析及实现[J].电力自动化设备,2012,32(11): |
| ZHANG Mingrui,XU Erfeng.Characteristic analysis and realization of SST operating in P-Q mode[J].Electric Power Automation Equipment,2012,32(11): |
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| 摘要: |
| 将未来可再生电能传输和管理（FREEDM）环网中固态变压器（SST）的工作模式分为VS模式和P-Q模式。根据FREEDM环网的运行要求，提出P-Q模式SST的配置原则和各环节的工作特性要求，输入级采用输出电流前馈控制降低SST直流侧电压的波动，输出级采用滤波电感电流反馈控制提高负载抗扰动性。所设计的SST在负载功率因数改变、容量突变和分布式电源切换等特殊运行工况下，均能保持直流电压和交流电压稳定，且保持输入侧单位功率因数运行。各级电压、电流都具有良好的动态响应。此外，SST还具有抗击负载扰动的良好性能，满足FREEDM环网对P-Q模式下SST的整体性能要求。 |
| 关键词: 固态变压器 变压器 P-Q模式 稳定 功率因数 前馈控制 反馈控制 |
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| 基金项目:教育部留学回国人员科研启动基金资助项目（0800-2410012）；中央高校基本科研业务费专项资金资助项目（0800-219196） |
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| Characteristic analysis and realization of SST operating in P-Q mode |
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ZHANG Mingrui, XU Erfeng
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College of Electronic and Information Engineering，Tongji University，Shanghai 201804，China
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| Abstract: |
| The operation of SST（Solid State Transformer） used in FREEDM（Future Renewable Electric Energy Delivery and Management） network is classified into VS mode and P-Q mode. The configuration principles and operational specifications of SST are proposed according to the operational requirements of FREEDM. The output current feedforward control is applied in the input stage to smooth the DC voltage of SST and the filter inductor current feedback control in output stage to improve the ability against load disturbance. The designed SST stabilizes the DC and AC voltages and maintains the operation with unity power factor at grid-side in different operating conditions，including power factor variation，load step change and distributed generator switchover. The voltage and current of different levels have good dynamic response and the designed SST is robust against the load disturbances，meeting the integral performance requirements of FREEDM network for SST in P-Q mode. |
| Key words: SST electric transformers P-Q mode stability electric power factor feedforward control feedback control |
