High-power power compensation voltage-stabilization capacity-adjustment alternating current power source with stepless-voltage-adjustment arc extinction switch
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A stepless, voltage-stabilizing technology, applied in reactive power compensation, AC network voltage adjustment, etc., can solve the problems of power factor drop of grid load, poor voltage quality, etc., reach the voltage uninterrupted range, reduce voltage fluctuation and flicker , the effect of improving the power factor
Inactive Publication Date: 2014-04-30
孙崇山
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[0021] Therefore, the above reasons all cause the load power
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example 1
[0091] Some electrical equipment, resistive and inductive loads, when used at the same time, the output voltage of the grid is 0.833 when the load is large. When used separately, the grid voltage is 1.25 when the load is small, while the grid voltage and electrical equipment voltage are required to be maintained at 1, the impedance angle of the system .
[0092] One transformer, three-phase, series variable voltage regulating transformer, voltage regulating range 40%, equipped with positive and negative voltage regulating switches, main series transformers are all connected in Yd11 group. The low-voltage output constant voltage of the main transformer is U1=1, and the highest output voltage of the low-voltage series transformer is U2=0.2. The capacity of the main transformer is 1, and the capacity of the series transformer is 0.2.
[0093] One AC voltage regulator, Y-connected three-phase AC voltage regulator, the voltage is 1.414 times higher than the tertiary side of the ...
example 2
[0103] One transformer has a capacity of 1, a voltage regulation range of 40%, positive and negative voltage regulation, Yd11 connection group, and a series voltage regulation transformer.
[0104] The low-voltage shunt capacitor bank is adjusted for power factor, cosj = 0.8 before compensation, and cosj = 0.95 after compensation.
[0105] See the principle of single-phase electrical wiring Figure 10 , see the combination form of secondary winding and capacitor Figure 11 , the form of the secondary coil and the position of the capacitor Figure 15 .
[0106] u 21 , U 22 The main transformer and the secondary voltage of the series transformer respectively, and the leakage reactance of the transformer is ignored.
[0107] The current vector diagram before compensation is Figure 16 .
[0108] The power factor before compensation is: cosj = 0.8 sinj = 0.6
[0109] At the same time, set the working current I of the equipment L = 1
[0110] In this way, the active comp...
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Abstract
The invention discloses a high-power power compensation voltage-stabilization capacity-adjustment alternating current power source with a stepless-voltage-adjustment arc extinction switch. The high-power power compensation voltage-stabilization capacity-adjustment alternating current power source is mainly applied to a resistance or resistance-capacitance alternating current load system with the voltage stepless or step adjustment requirement, the voltage stabilization requirement, the capacity adjustment requirement and the reactive compensation requirement. When the power grid secondary voltage is required to be adjusted, stepless voltage adjustment and step voltage adjustment can be carried out through the system, and the voltage adjustment function and the capacity adjustment function are achieved; when the power grid voltage is required to be constant, under the condition of any fluctuation of the power grid voltage, the voltage of the secondary side of a power grid can be kept constant at a high speed, the voltage stabilization function, the capacity increasing function and the power factor adjustment function are achieved, and it is most important that the Matthew effect in traditional power factor adjustment is eliminated. The high-power power compensation voltage-stabilization capacity-adjustment alternating current power source has the advantages of being high in automation degree, low in harmonic wave and free of maintenance, and saving energy. The waveform of the output voltage during step voltage adjustment is a sine wave. The waveform of the voltage during stepless voltage adjustment in any cycle wave is composed of continuous sine wave cycle pieces, the waveform of the voltage is continuous and approximates the sine wave when the voltage adjustment range is small, and the voltage adjustment range ranges from 0 percent to 100 percent.
Description
technical field [0001] The invention relates to a new technology capable of adjusting the power factor applied in resistive, resistive-inductive and resistive-capacitive AC systems with smooth stepless adjustment of voltage and continuous and uninterrupted intervals of voltage and current waveforms. The technical principle of the present invention is to superimpose another (or several) synchronous rate voltage adjustable (by AC Regulator regulation) on-off sine wave cycle (series variable output waveform of the series voltage regulating transformer, the voltage level is determined by the on-off ratio) to synthesize, the synthesized voltage can be continuously stepped voltage regulation (by the series variable modulation When the tertiary side switch of the voltage transformer replaces the AC voltage regulator or the two are jointly adjusted and controlled, the output waveform is a sine wave), or it can be a smooth stepless voltage regulation (when controlled by the AC voltage ...
Claims
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