Electric energy quality harmonic disturbance source platform

Abstract

The invention relates to an electric energy quality harmonic disturbance source platform. In the disturbance source platform, an input circuit breaker cabinet, a disturbance source input switch cabinet, an output filter and switch cabinet and an output test cabinet are all connected to a 10kV bus; the disturbance source input switch cabinet, an input transformer and unit cabinet, the output filter and switch cabinet, a switch and output transformer cabinet and the output test cabinet are sequentially connected; the output test cabinet, the input transformer and unit cabinet are connected with the input control cabinet; the electric energy quality harmonic disturbance source outputs 0-50 times or stacking folds of standard harmonic voltage current source with adjustable amplitude and phase under the conditions of 10kV and 0.38kV fundamental voltages, and the maximal total harmonic distortion THDu is less than 20%. The platform can be used as a standard electric energy quality harmonic output source and a power grid equipment assessment platform for testing operation stability of a power grid and performance of power grid equipment under the harmonic output condition; electric energy quality problems about sag, fluctuation and three-phase imbalance of the power grid are simulated, and a platform is built for test, analysis and assessment of electric energy quality improvement.

Description

technical field [0001] The invention relates to a power quality disturbance platform, in particular to a power quality harmonic disturbance source platform. Background technique [0002] With the application of a large number of nonlinear loads such as power electronic equipment, electric arc furnaces, and electric traction locomotives in the power grid, the resulting power quality problems pose severe challenges to the safe and stable operation of the power grid and the performance stability of power grid equipment. Therefore, it is necessary to detect and control harmonics to improve the operation stability of power grid equipment under harmonic conditions. In recent years, the power quality control equipment developed in the industry and put into power grid operation mainly includes active power filter (active power filter, APF), static var compensator (static var compensator, SVC), static synchronous compensator (static synchronous compensator, STATCOM), dynamic voltage...

AI Technical Summary

Problems solved by technology

The device can output harmonic current, active current, inductive and capacitive reactive current, but it cannot output harmonic voltage, the control method is relatively simple, it cannot output standard harmonic voltage and current according to user instructions, and the adjustable range is small

[0004] No. 200820080190.2 utility model patent titled "serial voltage disturbance device" discloses a device that generates voltage sags and swells, overvoltages, undervoltages, three-phase imbalances, voltage fluctuations and flickers, and waveform distortions in series debugging mode. Equal voltage disturbance generating device, including parallel converter transformer, three-phase full-bridge PWM rectifier, DC chopper and supercapacitor energy storage system, single-phase full-bridge PWM converter group, series / injection transformer, but its control is complex , the driving current is large, the switching device is easy to cause damage, the capacitor energy storage system is costly, the applicability is not strong, and the harmonic voltage current source cannot be output

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