The invention discloses a programmable trouble power simulator which is characterized in that the programmable trouble power simulator consists of an incoming line reactor, an LC (
inductor-
capacitor) filter, a direct-current
bus capacitor, a
voltage hall sensor, a current hall sensor, a rectification-side
current transformer, an inversion-side
current transformer and a direct-
current voltage limiting protection circuit. An upper computer sends driving
signal commands to a DSP (
Digital Signal Processor) to control the work of a rectification-side
current transformer and an inversion-side current
transformer respectively. The programmable trouble power simulator can realize the
simulation of various
power grid failures such as symmetrical and unsymmetrical
power grid voltage sag, unbalance three-phase circuits,
harmonic distortion,
frequency shift,
phase angle hopping,
voltage fluctuation and the like, and the parameters such as the
voltage sag amplitude, the
phase number, the unbalance three-phase circuit degree,
harmonic times and proportion, the frequency shifting amplitude and direction, the
phase angle changing size and property,
voltage fluctuation trends and the failure lasting time and the like all can be adjusted flexibly. The programmable trouble power simulator can be used as a testing device for researching a
wind power generation
system and examining the
delivery performance, or is used as a trouble power device for testing the performance of other grid-tied power
electronic equipment.