Method for realizing driving and power generation by using harmonic wave and apparatus using same method
A technology for harmonic and synchronous generators, applied in harmonic reduction devices, circuit devices, and AC networks to reduce harmonics/ripples, etc., can solve equipment cost increases, power grid harmonic energy waste, and no harmonic energy utilization Or re-convert fundamental wave electric energy and other issues to achieve the effect of reducing costs and increasing equipment costs
Inactive Publication Date: 2007-10-17
STATE GRID CORP OF CHINA +2
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Problems solved by technology
Although the use of multiple technology, meandering winding transformers or increasing the number of trigger pulses can reduce the harmonics brought by the equipment itself, it will greatly increase the cost of the equipment; traditional passive filter devices and power active filters that have attracted much attention are both Filtering is achieved by cutting off the transmission path of harmonic current. It filters out harmonics through a large amount of equipment investment to ensure the safe operation of the power grid and equipment. It causes a large amount of harmonic energy in the power grid to be wasted in vain.
[0003] Therefore, so far, there is no method to utilize or reconvert the harmonic energy in the grid into fundamental wave electric energy that can be utilized
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[0014] The method proposed by the present invention to use harmonics to drive motors or use harmonics to generate electricity is to use passive source filters (I) to extract harmonic components from the power grid, and combine the passive filter with the original three-winding transformer (II) The side coils are connected in series, and the fundamental wave degaussing of the transformer is performed by using the fundamental wave degaussing part (III) to inject a fundamental wave reactive current into a secondary winding of the three-winding transformer (II), so that the fundamental wave component of the transformer is approximately Short circuit, so that the harmonic voltage can be taken out from the other secondary winding of the transformer, the output of the harmonic voltage is connected in series with the filter reactor 5 and the armature winding of the DC motor 3 after three-phase full-wave rectification, the DC The excitation winding of the motor is provided with excitati...
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This invention puts forward a method for utilizing harmonic waves to drive or generate electricity which utilizes a passive filter to pick up harmonic waves form electric nets, the passive filter is serial to the original edge coil of three-winding transformer, a side edge coil of which is plugged into fundamental reactive current for erasion, the other side edge coil is used in picking up harmonic voltage which is connected with the armature windings of a filter reactor and a DC motor after three-phase full-wave rectification. The device is composed of a passive filter, a three-winding transformer, fundamental wave erasing part, a harmonic drive part and a generation part, the passive filter includes a LC single tuning filter and a high pass filer, the fundamental erasing part is composed of an inductor, a capacitor and a transformer erasing side-edge coil in series, the harmonic drive part comprises a DC motor and its exciting controller, three-phase rectifier and a filter reactor.
Description
technical field [0001] The invention relates to a method for using harmonics to drive a motor, drive production machinery to work, use harmonics to generate electricity, and convert harmful harmonic energy in a power grid into fundamental wave electric energy and a device for realizing the method. Background technique [0002] With the wide application of power electronic devices, the harmonic pollution in the power grid is becoming more and more serious. At present, the widely used harmonic processing method is to minimize harmonics or filter harmonics. The specific measures include: reducing harmonics through the wiring of transformer windings, using passive filters (such as single-tuned filters and high-pass filters) ) to filter out a certain harmonic or a certain number of harmonics, and reduce low-order harmonics by increasing the number of trigger pulses in DC transmission. Although the use of multiple technology, meandering winding transformers or increasing the numb...
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IPC IPC(8): H02J3/00H02J3/01
CPCY02E40/40
Inventor 赵国生师黎
Owner STATE GRID CORP OF CHINA