Abstract: The invention discloses a convenient human and animal power drive permanent magnet power generation and storage system, comprising a grip power drive power generation system; the grip power drive power generation system is a dumbbell-shaped grip power generation device, comprising a grip handle and power generation devices provided at both ends of the grip handle; the power generation device is composed of a permanent magnet generator, a tensioning wheel, a spring sheet, a winder ratchet device, and a battery; folding buckles are provided between the power generation devices at both ends and the grip handle so as to be folded inward. The invention solves the problem of continuous power guarantee of wearable intelligent device; in the invention, the grip-type slow gear is designed as a spring tensioning device similar to a mechanical watch; the stress generated during the grip tightens the spring.

Abstract: The invention discloses a convenient human and animal power drive permanent magnet power generation and storage system, comprising a grip power drive power generation system; the grip power drive power generation system is a dumbbell-shaped grip power generation device, comprising a grip handle and power generation devices provided at both ends of the grip handle; the power generation device is composed of a permanent magnet generator, a tensioning wheel, a spring sheet, a winder ratchet device, and a battery; folding buckles are provided between the power generation devices at both ends and the grip handle so as to be folded inward. The invention solves the problem of continuous power guarantee of wearable intelligent device; in the invention, the grip-type slow gear is designed as a spring tensioning device similar to a mechanical watch; the stress generated during the grip tightens the spring.

Abstract: This disclosure provides a PSR-PWM technique for high power active front-end inverters to damp a specific inter-harmonic that may cause relative sub-synchronous resonance in power system. Due to the strong interaction between wind power converters, photovoltaic converters, FACTS devices and HVDC transmission, low-frequency oscillations occur from a few Hz to dozens of Hz, or even high-frequency oscillations ranging from about 300-2000 Hz. Meanwhile, low-frequency oscillations ranging from 0.6 Hz to 7 Hz occur in the power supply systems of many electric locomotives. Even in the case of large-scale train outage, low-frequency oscillation will lead to abnormal locomotive dispatching system; in addition, the power grid voltage disturbance and flicker caused by a large number of high-power are furnaces and other nonlinear loads in the industrial field with a passband inter-harmonic frequency ranging from 0.05 Hz-90 Hz and so on are detected.

Abstract: This disclosure provides a PSR-PWM technique for high power active front-end inverters to damp a specific inter-harmonic that may cause relative sub-synchronous resonance in power system. Due to the strong interaction between wind power converters, photovoltaic converters, FACTS devices and HVDC transmission, low-frequency oscillations occur from a few Hz to dozens of Hz, or even high-frequency oscillations ranging from about 300-2000 Hz. Meanwhile, low-frequency oscillations ranging from 0.6 Hz to 7 Hz occur in the power supply systems of many electric locomotives. Even in the case of large-scale train outage, low-frequency oscillation will lead to abnormal locomotive dispatching system; in addition, the power grid voltage disturbance and flicker caused by a large number of high-power are furnaces and other nonlinear loads in the industrial field with a passband inter-harmonic frequency ranging from 0.05 Hz-90 Hz and so on are detected.