| 引用本文: | 张宪平,李亚西,许洪华.LCL滤波的风力发电网侧变流器不同控制结构下的性能研究[J].电力自动化设备,2009,(5): |
| .Performance of grid-side converter under different current control structures in wind power generation with LCL filter[J].Electric Power Automation Equipment,2009,(5): |
|
|
| 摘要: |
| 风力发电系统中LCL滤波器的电网侧电流反馈和变流器侧电流反馈都可用作电流闭环控制,但不同的电流反馈控制结构会对变流器产生不同的影响.分别在理想电网无阻尼电阻、非理想电网无阻尼电阻和理想电网有阻尼电阻3种情况下对风力发电网侧变流器进行了分析.建立了电网电压定向的同步旋转dq坐标系下的风力发电网侧变流器数学控制模型,其中PI控制器被用于补偿被控电流的误差.根据推导出的不同电流控制结构下的闭环传递函数,对其进行了根轨迹分析.通过分析及仿真发现变流器侧电流反馈控制结构相对于电网侧电流反馈控制结构控制算法较复杂,但是系统稳定性好,电网电流的谐波畸变率较低,而电网侧电流反馈控制结构尽管抗电网扰动性较强,但调节器参数受到很大限制,系统动态响应速度较慢,稳态精度较低. |
| 关键词: LCL滤波器 电网侧变流器 电网侧电流反馈 变流器侧电流反馈 阻尼电阻 |
| DOI： |
| 分类号:TM461 |
| 基金项目:国家高技术研究发展计划(863计划)? |
|
| Performance of grid-side converter under different current control structures in wind power generation with LCL filter |
|
ZHANG Xianping1 2 LI Yaxi1 XU Honghua1
|
| Abstract: |
| In wind power generation system with LCL filter,both grid-side and converter-side current feedbacks can be used for closed-loop current control.However,grid-side converter shows different performance in different current control structures.Three cases are analyzed:ideal grid without filter damping,non-ideal grid without filter damping and ideal grid with filter damping.The mathematical model of grid-side conver-ter with LCL filter in dq rotating coordinates for voltage oriented control is set up and its PI ... |
| Key words: LCL filter grid-side converter grid-side current feedback converter-side current feedback damping |
