【作者】 黄川；

【导师】 王志新；

【作者基本信息】 上海交通大学 ， 电机与电器， 2011， 硕士

【摘要】 随着全球经济的不断发展,能源危机也越发严重。传统能源因其储量有限、造成大量污染等原因促使人们不断开发新能源。风能作为一种可再生的清洁能源在全球范围内储量丰富,加之土地资源日益紧缺、近海地域风储量富足,大力发展海上风电已成为解决能源危机的一个重要手段。柔性直流输电技术较比传统输电技术有诸多优势,将其广泛应用于近海风场风电的传输和并网连接也成为了发展海上风电的关键。本文着重研究基于电压源型变流器的柔性直流输电变流器(VSC-HVDC)。在介绍VSC-HVDC的基本控制原理的基础上,对其主电路和无源滤波系统的参数进行了详细的分析和计算,并基于同步旋转坐标系(d-q系)设计了海上风电场柔性直流输电变流器的双闭环矢量控制系统,实现了有功功率和无功功率的独立控制。同时针对柔性直流输电系统对变流器要求的大功率应用场合,设计了新型模块化级联多电平变流器(MMC),提出了将参考信号叠加平衡分量方法与电容排序法相结合以解决MMC存在的直流电容电压均压问题。利用仿真软件Matlab/Simulink对所设计的VSC-HVDC和MMC拓扑结构的控制方式进行了仿真验证,仿真结果证实了主电路和滤波系统参数选择的合理性以及所采用的控制方式的有效性采用TI公司的TMS320F28335DSP作为控制芯片搭建了VSC-HVDC实验系统,对双闭环矢量控制编写了DSP程序,同时基于触摸屏和PLC设计了上位操作界面及相应的通讯系统,验证了所设计的拓扑结构和控制方法的正确性。本文的研究对于海上风电场VSC-HVDC系统原理的研究具有一定的理论和实践意义,有助于大功率系统的进一步开发,以实现我国海上风电场VSC-HVDC输电系统的产业化。更多还原

【Abstract】 Along with the global economy development, the energy crisis is growing more serious. The traditional energy, because of whose limited reserves and caused a lot of pollution, prompted people to develop renewable new energy. As a kind of renewable energy, Wind power has abundant reserves in the global range, coupled with growing shortage of land resources and rich wind energy storage on offshore areas, vigorously developing offshore wind business has become an important method to solve the energy crisis. Flexible HVDC transmission technology over the traditional technology has many advantages. It will be widely used in the transmission of the offshore wind farm and grid connection, which has become the key of offshore wind power development.This topic studies flexible high voltage direct current transmission based on voltage source converter which called VSC-HVDC system. According to the basic working principle of VSC-HVDC, this paper carries the parameters of the main circuit and filter on the detailed analysis and calculation. Then based on synchronization reference frame (d-q department), this paper designs the double loop vector control system for the offshore wind farms flexible HVDC converter, realized the active power and reactive power independent control. And in the light of converter requirements of the high power applications by flexible HVDC system, this paper designs the new module multilevel converter (MMC) and takes the method of weighting balance signals on reference and the method of sorting capacitance together to solve dc voltage sharing problem which existed in MMC. Using simulation software Matlab/Simulink simulates the designed topology structure and control mode of VSC-HVDC and MMC, simulation results confirm the main circuit and filtering system parameter selection rational and the control method effectiveFinally, using the TMS320F28335DSP which provided by TI Company as a control chip to built VSC-HVDC experiment system, wrote the DSP program On the double closed loop vector control, at the same time, based on PLC and touch screen interface, designs corresponding communication system and the experiments show the validity of the method which adopted by this paper.The research of this topic has certain theoretical and practical significance for offshore wind farms VSC-HVDC system theory research. It is helpful for the further development of the more system to realize the industrialization of the offshore wind farms VSC-HVDC transmission system in our country.更多还原