论文部分内容阅读
传统的风力发电并网方式主要有直接并网和降压并网,在并网瞬间会产生很大的冲击电流。根据交流励磁变速恒频风力发电的运行特点,将矢量控制的电网电压定向技术应用于双馈发电机的并网发电上,提出一种基于电网电压定向的双馈变速恒频风力发电空载并网控制策略,即在定子开路条件下,根据电网电压和电机转速来调节转子的励磁电流,在变速条件下实现几乎无冲击电流并网和输出有功、无功功率的解耦控制,建立了交流励磁发电机空载并网及稳态运行控制模型。仿真和实验结果表明,本文所提出的空载并网方式是变速恒频风力发电的一种较理想的并网方式。
The traditional methods of grid-connected wind power are mainly direct grid-connected and step-down grid-connected, which will generate a great impact current in the grid. According to the operation characteristics of AC excitation VSCF wind power generation, the vector-controlled grid voltage oriented technology is applied to the grid-connected power generation of doubly-fed generator. A doubly fed VSCF wind power generation based on grid voltage orientation is proposed. Network control strategy, that is, under the condition of stator open circuit, the excitation current of the rotor is adjusted according to the grid voltage and the motor speed, and the almost no-shock current grid-connected and output active and reactive power decoupling control under variable speed conditions, Excitation Generator No - load Grid - connected and Steady Operational Control Model. Simulation and experimental results show that the no-load grid-connected method proposed in this paper is an ideal grid-connected way for VSCF wind power generation.