Simulations with Matlab / Simulink show that,the method eliminates the influence of nonlinearity and unbalanced load on power system and makes the input power factor equal to 1.Furthermore,the series compensator isolates the effect of network voltage variation on load voltage and the shunt compensator provides balanced and sinusoidal rated three-phase voltages to load.
The principle causing unloading voltage in automobile is described in detail in this paper and the corresponding calculating formula is derived according to the theory .
The other part with long continuance and large harm is a rectification voltage of an induced electromotive force in stator coils induced by magnetic field in field coils. At last calculating formulas for unloading voltage with a saturated magnetic circuit and a unsaturated magnetic circuit are derived, and some analyzing examples are given.
The error of output voltage in rectified circuits was analyzed, and the theory formula of the calculation was modified, so that the experimental measure values of loading voltage were more approximate to its theoretical correction results, thus reducing the experimental system errors.
The influence of this effect (the so-called "polarity effect") on the implosion of cylindrical tungsten wire arrays in the Angara-5-1 facility becomes significant when the load voltage grows at a sufficiently high rate.
The function can be applied to direct transient stability analysis of multi-machine large power systems and provides a tool for analysis of the interaction between the generator angle stability and the load voltage stability.
A novel control scheme for the stabilization of load voltage and the compensation for high harmonics of load current in series-type active power filter systems combined with shunt-type active power filters is proposed.
The control system allows an effective correction of power factor, harmonic distortion, and load voltage regulation.
A new device and algorithm for switching without time delay and, consequently, without load voltage surges are proposed.
This paper gives an account of an SCR inverter circuit made up of two inverters with constant voltage and sinewave output. As part of each inverter voltage is tapped out from the resonant capacitors, the control of the output voltage is obtained by the phase-shifting between the two inverters. This SCR inverter circuit not only retains the advantages possessed by the series capacitor-commutated inverter, it is readily regulated just as in the case of the improved parallel capacitor-commutated inverter. Besides,...
This paper gives an account of an SCR inverter circuit made up of two inverters with constant voltage and sinewave output. As part of each inverter voltage is tapped out from the resonant capacitors, the control of the output voltage is obtained by the phase-shifting between the two inverters. This SCR inverter circuit not only retains the advantages possessed by the series capacitor-commutated inverter, it is readily regulated just as in the case of the improved parallel capacitor-commutated inverter. Besides, it has neither filter nor power output transformer. When the desired output voltage (R. M. S.) approaches the d. c. supply voltage, this SCR has optimum performance within the frequency range from 400 Hz to 10 kHz.
Three equations for satisfying symmetrical condition of voltage or current of threephase three-wire load in the form of rotating factor am and admittance or impedance are introduced. These equations will eliminate negligence in most books of electric circuit and may be helpful to compacting and perfecting the theory of threephase circuit and may provide foundations and examples for opening up the application of non-symmetrical circuit.
This paper discusses the design method of an effective voltage linearity controller of linear load working in AC power networks. With this simple design method it is easy to get high quality products with low cost. The linearity and stability can both easily reach 2%. The products, having strong anti-interference ability, are suitable for use in the closed loop or open loop feedback control system as the voltage linearity controller of terminating linear power load. The design method is of great industrial value....
This paper discusses the design method of an effective voltage linearity controller of linear load working in AC power networks. With this simple design method it is easy to get high quality products with low cost. The linearity and stability can both easily reach 2%. The products, having strong anti-interference ability, are suitable for use in the closed loop or open loop feedback control system as the voltage linearity controller of terminating linear power load. The design method is of great industrial value.
负载电压
load voltage
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