摘要
传统的静止同步补偿器功能(STATCOM)较为单一,特别在大功率领域主要以补偿无功或稳定电压为主,提出一种谐波分频补偿技术,能够在动态无功补偿的同时实现20次以内的谐波治理,解决了目前大功率领域中无功与谐波不能综合补偿的问题。此外,给出了装置基于平均开关法的数学模型,在此基础上实现有功和无功电流的解耦控制。该补偿器采用8级级联H桥结构,配合载波移相SVM技术运用,装置最大可实现17电平的电压波形,电流电压利用率高且易于数字化实现。最后,仿真和实验结果表明,基于谐波分频控制技术的6 kV级联同步补偿器能够在实际电网中,以较低的开关频率,准确、有效地实现无功功率与谐波的综合补偿。
The function of traditional static synchronous compensator is relatively single, especially in high power field to compensate the reactive power and voltage stability,a kind of harmonic sub frequency compensation technique was put forward, which can realize dynamic reactive power compensation as well as harmonic control within 20th power, solved the problem of compensation happened in high power field that reactive and harmonic can not be integrated. In addition, the mathematical model for the device was given based on the average switching method, on the basis of which, active and reactive current decoupling control is realized. The compensator using 8 cascaded H bridge structure, combined with the carrier phaseshifted SVM technology, can realize 17 level voltage waveform, having high current and voltage utilization rate and easy for digital realization. Finally, simulation and experimental results show that the harmonic frequency control technology of 6 kV cascade compensator can be used in the actual grid, having low switching frequency, realizing reactive power and harmonic comprehensive compensation accurately and effectively.
出处
《电气传动》
北大核心
2013年第5期41-46,共6页
Electric Drive
基金
国家自然科学青年基金(61104028)
南通市应用研究计划项目(BK2011016)
南通河海大学海洋与近海工程研究院“科技研发与产业化引导专项”项目
关键词
静止同步补偿器
级联H桥
谐波分频补偿
载波移相技术
static synchronous compensator （STATCOM）
cascaded H bridge structure
harmonic sub-frequencycompensation
carrier phase shift technique
