基于半橋子模塊結構的模塊化多電平換流閥損耗特性分析
發(fā)布時間：2018-10-15 13:14
【摘要】：模塊化多電平換流閥拓撲結構是目前最受關注的柔直換流閥拓撲,目前對于其半橋結構的均壓環(huán)流等控制方法已經(jīng)有大量系統(tǒng)的研究,但是都沒有針對該控制方式對于損耗的影響進行進一步分析,關于換流閥損耗的分析又都僅局限于特定工作模式下?lián)Q流閥總損耗率的計算,缺乏對子模塊損耗一致性的研究。本文在研究MMC拓撲結構、調制技術和控制方法的基礎上,分析了MMC損耗計算方法及不同控制方法下的半橋子模塊各器件損耗特性以及損耗一致性問題。首先介紹了MMC換流閥的基本工作原理。研究了MMC換流閥的損耗構成,分析了損耗計算方法。采用PLECS仿真軟件對MMC換流閥損耗進行計算,結合算例對損耗計算方法的準確性進行了對比驗證。其次針對半橋子模塊結構分析了NLC調制方式下子模塊損耗特性。包括使用限值法和保持因子法這兩種排序方法時子模塊的損耗特性；使用環(huán)流控制抑制器法(CCSC)和三相解耦二次諧波環(huán)流抑制算法(TPD)這兩種環(huán)流抑制策略時子模塊的損耗特性；子模塊電容容值變化時子模塊的損耗特性；改進NLC調制方式,使其輸出2N+1電平時子模塊的損耗特性。與NLC類似,針對半橋子模塊結構分析了CPS-SPWM調制方式下子模塊損耗特性。包括使用能量均衡法和排序法這兩種均壓方法時子模塊的損耗特性；使用環(huán)流控制抑制器(CCSC)法和三相解耦二次諧波環(huán)流抑制算法(TPD)這兩種環(huán)流抑制策略時子模塊的損耗特性。論文最后比較了上述兩種調制方式在不同交流側功率因數(shù)下子模塊損耗特性以及子模塊之間的溫度分布特性。
[Abstract]:Modularized multilevel converter valve topology is the most concerned topology of flexible and straight converter valve. However, no further analysis has been made on the effect of the control mode on the loss, and the analysis on the loss of the converter valve is limited to the calculation of the total loss rate of the converter valve under the specific working mode, and the research on the consistency of the submodule loss is lacking. Based on the study of MMC topology, modulation techniques and control methods, this paper analyzes the loss characteristics and loss consistency of each device of the half-bridge sub-module under different control methods and the calculation methods of MMC loss. Firstly, the basic working principle of MMC converter valve is introduced. The loss composition of MMC converter valve is studied and the loss calculation method is analyzed. The PLECS simulation software is used to calculate the loss of the MMC converter valve, and the accuracy of the loss calculation method is compared with an example. Secondly, the loss characteristics of the submodule of NLC modulation are analyzed for the half-bridge sub-module structure. The loss characteristics of sub-modules are analyzed by using the limiting method and the holding factor method, and the loss characteristics of the sub-modules using the circulation control suppressor method (CCSC) and the three-phase decoupled second-harmonic current suppression algorithm (TPD). The loss characteristics of the submodule when the capacitance capacity of the submodule changes, and the loss characteristics of the submodule output 2N1 electrical submodule by improving the NLC modulation mode. Similar to NLC, the submodule loss characteristics of CPS-SPWM modulation mode are analyzed for the half-bridge sub-module structure. The loss characteristics of sub-modules are discussed in this paper, including the energy equalization method and the sorting method, and the loss characteristics of the sub-modules using the circulation control suppressor (CCSC) and the three-phase decoupled second-harmonic current suppression algorithm (TPD). Finally, the loss characteristics and temperature distribution characteristics of the two modulation modes in different AC power factor submodules are compared.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TM721.1
本文編號：2272662
[Abstract]:Modularized multilevel converter valve topology is the most concerned topology of flexible and straight converter valve. However, no further analysis has been made on the effect of the control mode on the loss, and the analysis on the loss of the converter valve is limited to the calculation of the total loss rate of the converter valve under the specific working mode, and the research on the consistency of the submodule loss is lacking. Based on the study of MMC topology, modulation techniques and control methods, this paper analyzes the loss characteristics and loss consistency of each device of the half-bridge sub-module under different control methods and the calculation methods of MMC loss. Firstly, the basic working principle of MMC converter valve is introduced. The loss composition of MMC converter valve is studied and the loss calculation method is analyzed. The PLECS simulation software is used to calculate the loss of the MMC converter valve, and the accuracy of the loss calculation method is compared with an example. Secondly, the loss characteristics of the submodule of NLC modulation are analyzed for the half-bridge sub-module structure. The loss characteristics of sub-modules are analyzed by using the limiting method and the holding factor method, and the loss characteristics of the sub-modules using the circulation control suppressor method (CCSC) and the three-phase decoupled second-harmonic current suppression algorithm (TPD). The loss characteristics of the submodule when the capacitance capacity of the submodule changes, and the loss characteristics of the submodule output 2N1 electrical submodule by improving the NLC modulation mode. Similar to NLC, the submodule loss characteristics of CPS-SPWM modulation mode are analyzed for the half-bridge sub-module structure. The loss characteristics of sub-modules are discussed in this paper, including the energy equalization method and the sorting method, and the loss characteristics of the sub-modules using the circulation control suppressor (CCSC) and the three-phase decoupled second-harmonic current suppression algorithm (TPD). Finally, the loss characteristics and temperature distribution characteristics of the two modulation modes in different AC power factor submodules are compared.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TM721.1
【參考文獻】
相關期刊論文 前4條
1 胡建輝;李錦庚;鄒繼斌;譚久彬;;變頻器中的IGBT模塊損耗計算及散熱系統(tǒng)設計[J];電工技術學報;2009年03期
2 李力;伍雙喜;張軒;向麗玲;譚嫣;趙曉斌;;南澳多端柔性直流輸電工程的運行方式分析[J];廣東電力;2014年05期
3 李亞男;蔣維勇;余世峰;鄒欣;;舟山多端柔性直流輸電工程系統(tǒng)設計[J];高電壓技術;2014年08期
4 俞俊霞;肖斌;;基于VSC-HVDC的南匯風電場并網(wǎng)應用研究[J];上海電力;2011年03期
，本文編號：2272662
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