针对适合户用分布式光伏电站接入的电网模拟器的技术要求,对电网模拟器进行了结构选择、参数设计和控制策略研究。侧重讨论了基于电压滞环控制的逆变器设计,利用PSCAD/EMTDC仿真软件进行了15 k W电网模拟器的仿真测试。仿真结果表明系...针对适合户用分布式光伏电站接入的电网模拟器的技术要求,对电网模拟器进行了结构选择、参数设计和控制策略研究。侧重讨论了基于电压滞环控制的逆变器设计,利用PSCAD/EMTDC仿真软件进行了15 k W电网模拟器的仿真测试。仿真结果表明系统参数设计正确,带微分环节的电压滞环控制能跟踪快速变化的给定信号,输出电压半环宽大小可控,电网模拟器具有一定的带非线性负载能力,验证了该方法的正确性和可行性。展开更多
The use of wind power has grown rapidly in recent years.Wind power is a clean source of energy,but can have negative impacts on the distribution grid.The influence of large-scale wind power integration on the safe and...The use of wind power has grown rapidly in recent years.Wind power is a clean source of energy,but can have negative impacts on the distribution grid.The influence of large-scale wind power integration on the safe and stable operation of a power system cannot be ignored.It is necessary and urgent to achieve grid adaptability for wind turbines in China.Using a 35 kV/6 MVA grid simulator,the performance of a grid is investigated by simulation.Typical grid disturbances such as voltage deviation,frequency fluctuation,voltage unbalance,and distortion can be simulated.A grid adaptability testing methodology was developed and applied to a doubly fed wind turbine with a focus on analyzing real test data to ascertain its three-phase voltage unbalance adaptability,which was successfully demonstrated.The methodology can also be used to guide other grid adaptability tests.展开更多
文摘针对适合户用分布式光伏电站接入的电网模拟器的技术要求,对电网模拟器进行了结构选择、参数设计和控制策略研究。侧重讨论了基于电压滞环控制的逆变器设计,利用PSCAD/EMTDC仿真软件进行了15 k W电网模拟器的仿真测试。仿真结果表明系统参数设计正确,带微分环节的电压滞环控制能跟踪快速变化的给定信号,输出电压半环宽大小可控,电网模拟器具有一定的带非线性负载能力,验证了该方法的正确性和可行性。
文摘The use of wind power has grown rapidly in recent years.Wind power is a clean source of energy,but can have negative impacts on the distribution grid.The influence of large-scale wind power integration on the safe and stable operation of a power system cannot be ignored.It is necessary and urgent to achieve grid adaptability for wind turbines in China.Using a 35 kV/6 MVA grid simulator,the performance of a grid is investigated by simulation.Typical grid disturbances such as voltage deviation,frequency fluctuation,voltage unbalance,and distortion can be simulated.A grid adaptability testing methodology was developed and applied to a doubly fed wind turbine with a focus on analyzing real test data to ascertain its three-phase voltage unbalance adaptability,which was successfully demonstrated.The methodology can also be used to guide other grid adaptability tests.
