| 采样延迟和误差对三电平PWM整流直接功率控制性能的影响及其抑制方法 |
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| 引用本文： | 鲁挺,赵争鸣,张颖超,袁立强.采样延迟和误差对三电平PWM整流直接功率控制性能的影响及其抑制方法[J].电工技术学报,2010(3). |
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| 作者姓名： | 鲁挺 赵争鸣 张颖超 袁立强 |
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| 作者单位： | 清华大学电机系电力系统及发电设备安全控制和仿真国家重点实验室;重庆通信学院电力工程系; |
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| 基金项目： | 国家自然科学基金重点资助项目(50737002) |
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| 摘 要： | 在电力电子变换装置应用场合,采样延迟和误差有时会成为限制控制性能的主要因素。为了研究和解决这一问题,基于采用直接功率控制(DPC)的三电平脉宽调制(PWM)整流器,详细分析了采样延迟和误差对DPC控制性能的影响及其原因,根据采样环节不同物理量性质及其载体特点,从硬件和软件角度提出了减小采样延迟、抑制采样误差、提高直接功率控制性能的方法。实验结果表明,改进后系统的稳态性能大幅度提高,验证了方法的正确性和可行性。
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| 关 键 词： | 脉宽调制整流器 直接功率控制 采样延迟 采样误差 稳态性能 |
Effect of Sampling Delay and Error on Direct Power Control Performance of Three-Level PWM Rectifier and Its Restraining Method |
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| Lu Ting Zhao Zhengming Zhang Yingchao Yuan Liqiang.Effect of Sampling Delay and Error on Direct Power Control Performance of Three-Level PWM Rectifier and Its Restraining Method[J].Transactions of China Electrotechnical Society,2010(3). |
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| Authors: | Lu Ting Zhao Zhengming Zhang Yingchao Yuan Liqiang |
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| Affiliation: | 1. The State Key Laboratory of Power System Tsinghua University Beijing 100084 China 2. Chongqing Communication Institute Chongqing 400035 China |
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| Abstract: | In applications of power electronic converters, the delay and error in sampling are sometime main factors which limit the control performance. This paper investigates this problem on a three-level pulse width modulation (PWM) rectifier with direct power control, analyzes the influences on direct power control (DPC) performance caused by sampling delay and error in detail. Based on the characteristics of various physical quantities and their carriers in sampling system, the method for reducing the sampling d... |
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| Keywords: | PWM rectifier DPC sample delay sample error steady-state performance |
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