| 引用本文: | 李 承,沈 文,丁洪发,文劲宇.级联多电平高压DC／AC变换器单周控制策略[J].电力自动化设备,2011,31(10): |
| LI Cheng,SHEN Wen,DING Hongfa,WEN Jinyu.Cascaded multilevel high-voltage DC／AC converter with one cycle control[J].Electric Power Automation Equipment,2011,31(10): |
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| 摘要: |
| 将单周控制技术用于级联多电平变换器提高其控制性能。在理论分析的基础上，建立了级联多电平DC／AC变换器单周控制模型，并建立了4个3级H桥三相级联多电平电路仿真实例。在开关频率为2500Hz、滤波电感为4mH、滤波电容为14μF、每级H桥直流侧电压为500V并在10% 范围内变化时，变换器输出交流相电压幅值为1268V，线电压幅值为2193V，输出电压稳定，4个实例的电压THD均小于5%。理论与模拟实例分析表明：单周控制用于级联多电平变换器控制具有控制电路简单、控制效果好、输出稳定等特点。 |
| 关键词: 级联多电平 DC／AC 变换器 单周控制 建模 |
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| 基金项目:国家科技支撑计划资助项目（2007BAA12B03）；国家自然科学基金资助项目 （50777026） |
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| Cascaded multilevel high-voltage DC／AC converter with one cycle control |
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LI Cheng1, SHEN Wen2, DING Hongfa1, WEN Jinyu1
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1.College of Electric & Electronic Engineering，Huazhong University of Science and Technology，Wuhan 430074，China;2.Changzhou Power Supply Company，Changzhou 213000，China
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| Abstract: |
| One cycle control technique is applied in cascaded multilevel converter to improve its performance. Based on the theoretical analysis，a cascaded multi-level DC／AC converter control model with one cycle control is proposed and four simulation examples of three-phase cascaded H-bridge multilevel converter are built. The output AC phase-voltage of converter is 1268V and its output line-voltage is 2193V when the switching frequency is 2500Hz，the filter inductance is 4mH，the filter capacitor is 14μF and the DC-side voltage of each H-bridge is 500V with fluctuation under 10%，and the output voltage is stable. Four examples indicate the voltage THD is less than 5%. Theoretical and simulative results show that，the cascaded multilevel converter with one cycle control has the advantages of simple control circuit，good control effect and stable output voltage. |
| Key words: cascaded multilevel DC／AC electric converters one cycle control model building |
