【作者】 杜雄；

【导师】 周雒维；

【作者基本信息】 重庆大学 ， 电气工程， 2005， 博士

【摘要】 输变电安全是关系我国经济持续、稳定发展的关键，也是国家“十一五”规划及中长期科技发展规划的重要研究领域。电力谐波污染对电力系统稳定、安全、经济运行造成巨大威胁，是影响输变电安全的重要因素之一，所以电力谐波抑制的研究已成为世界各国的研究重点。本论文针对电力谐波的抑制提出了双频变换器理论及三相直流侧有源电力滤波技术，并进行了深入研究。研究内容主要包括：双频变换器系列的拓扑结构、控制策略及其在电力谐波治理等领域中的应用；用于谐波治理的三相整流桥直流侧有源电力滤波器拓扑结构和控制方法，以及在电力谐波治理中采用的单周控制方法。 论文首先针对变换器的容量和性能之间的矛盾，从变换器理论的角度，提出了基本双频DC-DC变换器系列拓扑结构。该结构由高频单元和低频单元组合运行，两单元功能相对分离。其中，低频单元主要处理功率；高频单元提高变换器性能，仅处理很小部分的功率，可以在现有功率器件水平下同时提高变换器的容量和性能。 随后，论文采用变换器拓扑结构推演的方法，对基本双频DC-DC变换器进行了拓展，将能量单向流动的双频DC-DC变换器推广到能量可以双向流动的单相桥式、三相桥式结构的双频AC-DC、DC-AC变换器，形成了较完整的双频变换器系列拓扑结构，为双频变换器在大功率场合的应用奠定了基础。 在提出双频变换器的基础上，论文主要对双频变换器在有源电力滤波器(APF)、功率因数校正器(PFC)等领域中的应用进行了深入研究。理论和仿真、实验研究结果表明：双频APF、PFC中的高频单元仅处理很小部分的功率，与工作在高频状态下的单频APF、PFC相比，效率大大提高，而它们的谐波补偿效果相当，可以在现有功率器件水平下提高功率等级、增大容量。同时，论文对双频变换器的建模和参数设计等方面也进行了研究，为双频变换器的实际应用打下了基础。论文还对双频变换器在逆变器、开关功率放大器等中的应用进行了研究。 针对大量使用的三相不可控整流桥，论文提出了三相直流侧有源电力滤波的新概念，研究出了三相并联型直流侧有源电力滤波器的拓扑结构及其相关控制策略。研究表明：针对同样的整流桥负载，与传统的三相交流侧有源电力滤波器相比，三相直流侧APF具有更小的补偿容量、开关应力，以及更好的补偿效果。为了更进一步减少有源开关数量，论文还提出了谐波注入式结构的三相直流侧并联型有源电力滤波器。 最后，论文对在电力谐波治理中采用的单周控制方法所存在的一些问题进行更多还原

【Abstract】 The safety problem of transmitting and transforming power is critical for our country’s economy developing continuously and steadily, and it is also an important research field in "the fifteenth national five year plan" and "the moderate and long time science and technology development program". Power harmonic pollution is a large threat for power system running steadily, safely and economically, and one of the important factors that affect the safety of transmitting and transforming power. Thus, research on power harmonic suppression becomes the focus around the world. This dissertation studied novel methods of power harmonic active compensation, especially on the converter with double-frequency which is used to improve the compensation capacity and compensation performance of power harmonic suppression, three-phase DC side active power filter on the DC side of uncontrolled rectifier that suppresses the power harmonic, and the concerned one-cycle control method.Firstly, the DC-DC converter with double-frequency was proposed in the point of basic converters in order to solve the contradiction between the capacity and the compensation performance of power harmonic suppression equipment. In the proposed topology, high frequency unit and low frequency unit worked combinatorially, but the functions of which separated relatively. The low frequency unit processed the output power, while the high frequency unit improved the converter performance. Under the nowadays power components development level, this can increase the capacity of the converter, as well as improving the performance, which pave the way to improve the performance of APRThen the dissertation developed the basic DC-DC converter with double-frequency by the converter topology deducing method. From the DC-DC converter with double-frequency in which power flowed in one direction, to the AC-DC and DC-AC converters of single-phase bridge and three-phase bridge structure with double-frequency in which power flowed in two directions, a list of converter with double-frequency is formed.Based on the proposed converter with double-frequency, the dissertation mainly studied the application of the converter with double-frequency in active power filter(APF), power factor correction(PFC) etc. The result indicated that: under the nowadays power components development level, the APF and PFC with更多还原