海上多端直流输电系统协调控制研究

发布时间：2018-06-16 10:25

本文选题：多端直流输电系统 + 海上风电　；参考：《电网技术》2014年01期

【摘要】：为了避免多端直流输电系统(multi-terminal DC,MTDC)对各换流站之间高速通信的要求,实现各换流站间的自主协调控制,基于电压源型换流器的电压?电流特性和故障时减少风功率注入的思想,提出了种应用于大规模海上风电场功率远距离外送的多端直流输电系统协调控制策略。在多端直流输电系统正常运行时,网侧换流器不仅可以控制直流电压的稳定,而且可灵活对电网进行风电功率传输。在多端直流输电系统故障运行时,风场侧换流器来保持直流电压的稳定和协调风场间各风机出力。后,搭建了Matlab/Simulink仿真模型,针对所提出控制策略的动态性能进行了仿真验证,结果表明所提控制策略能够保持直流电压在交直流故障等大扰动下相对稳定,维持系统正常运行。
[Abstract]:In order to avoid the requirement of multi-terminal DC / MTDCC) for high speed communication between converter stations, and to realize the independent coordination control among the converter stations, the voltage based on voltage source converter is realized. Based on the current characteristics and the idea of reducing wind power injection in fault, a coordinated control strategy for multi-terminal HVDC transmission system is proposed, which is applied to the long-distance transmission of power in large-scale offshore wind farms. When the multi-terminal HVDC transmission system is running normally, the grid-side converter can not only control the stability of DC voltage, but also flexibly transmit the wind power to the power grid. In the fault operation of multi-terminal HVDC transmission system, the wind field side converter is used to maintain the stability of DC voltage and to coordinate the blower output force between the wind fields. Then the Matlab / Simulink simulation model is built and the dynamic performance of the proposed control strategy is verified. The results show that the proposed control strategy can keep the DC voltage relatively stable under the large disturbance such as AC / DC fault and maintain the normal operation of the system.
【作者单位】：新能源电力系统国家重点实验室(华北电力大学);
【分类号】：TM721.1

【参考文献】