摘要
设计和建立一个基于PLC的全功率风力发电实验模拟平台。PLC作为主控制器,通过两台变频器分别控制一台3 kW的全功率风力发电机和一台4 kW的风力机;ATV71变频器带动风力机模拟实际环境风力变化,外界输入的风能功率通过ATV71的转矩控制反映;四象限变频器ACS800通过磁通矢量控制给定全功率风力发电机的速度,发电机在电动机带动下工作在回馈制动状态,回馈的电能通过四象限变频器ACS800传递给电网。转矩控制使用一个简单的风机模型用于计算给定转矩。长时间运行验证其稳定性,同时得到静态特性下系统的最大功率点。系统运行结果:运行曲线与理论期望相符,最大功率点在500 r/min左右,可以承担后续研究任务。四象限变频器大大减少了系统的复杂度。
To improve the present situation of lacking experimental platforms in wind power field,the paper designs and builds a full-size power wind power simulation system based on PLC. The PLC is the main controller,through two inverter respectively it controls a 3 kW full-size power wind generator and a 4 kW wind turbine. ATV71 wind inverter drives wind machine to simulate actual environment changes. The input of wind power is reflected through torque control. A four quadrant converter ACS800 controls the speed of turbine through the magnetic flux vector control, generator is driven under motor in regenerative braking state,and feedback of electricity is passed to the grid through the four quadrant converter ACS800. Torque control is implemented by a simple model of wind turbine which calculates the given torque. Long-time running verifies its stability,and at the same time,it can get maximum power point of static characteristic of the system. System operation results show that running curve is consistent with expectation of the theory, maximum power point is around 500 r / min. It can be responsible for the follow-up study. Four quadrant converter greatly reduces the complexity of the system.
出处
《实验室研究与探索》
CAS
北大核心
2014年第3期72-75,共4页
Research and Exploration In Laboratory
