【摘要】 谐波电流的实时准确检测是谐波抑制的关键。为提高检测方法的实时性,提高动态响应速度,可以引入基波电流反馈和采用均值理论省去滤波器。本文对目前应用比较成熟的单相电路有功电流分离法和三相电路ip-iq法进行改进,引入基波电流反馈和采用均值理论省去滤波器,从理论分析对比和仿真对比表明,两种方法都可以减小延时、提高动态响应速度,反馈法在动态的、连续调节的、不断补偿的过程中缩小延时,而均值理论法可以定量地减少延时,ip-iq法引入均值理论甚至可将延迟时间缩减至T/6,大大提高了检测方法的实时性,也正验证了三相电路ip-iq法的优越性。更多还原

【Abstract】 Real-time detection for harmonics currents is the key of harmonics limitation.Feedback and average theory are used to improve the instantaneity of detection and dynamic response speed.In this paper,the method of separating active currents in single-phase circuit and ip-iq in three-phase circuit are studied deeply and ameliorated,and the mean fundamental theory of current-feedback is used for reducing the delay time.It is testified through analysis and simulation.Both methods can reduce the latency,improve dynamic response speed.The feedback method reduces the time delay in a dynamic,continuous process,while the mean theoretical method can quantify the reduction in latency,and the introduction of the mean theory to ip-iq theory can even reduce the delay to T / 6,which raises the instantaneity significantly,also the superiority of the law is being verified.更多还原