*By type, the global high voltage amplifier market is segmented into unipolar and bipolar.
*By slew rate, the global high voltage amplifier market is segmented into 15-50 V/[micro sign]s, 50-500 V/[micro sign]s, 500-1000 V/[micro sign]s, 1000-2000 V/[micro sign]s, and more than 2000 V/[micro sign]s.
The pulse-width modulation (PWM) method is implemented to obtain the duty cycles of voltage commands by means of an IT-2FLC and a PI.
The q-axis current is determined by a DC link voltage during LVRT operation.
In a typical logic circuit, a logic switch connects a voltage
source to a short transmission line.
Modern transistor assemblies with operating voltages
up to 10 kV and thyristors as power electronic energy switches in low-voltage circuits of pulse generators make it possible to receive microsecond pulses with an amplitude of 25-500 kV on the load connected to the high-voltage terminals of these generators [1, 2].
where [i.sup.*.sub.2d] and [i.sup.*.sub.2q] are the load current command values in d-q coordinate system and [i.sub.2d] and [i.sub.2q] are the actual values; [u.sup.*.sub.2d] and [u.sup.*.sub.2q] are the load bus voltage
command values in d-q coordinate system, [u'.sub.2d] and [u'.sub.2q] are the reference values, and [u.sub.2d] and [u.sub.2q] are the actual values; [K.sub.P3], [K.sub.I3], [K.sub.P4], and [K.sub.I4] are the parameters of PI controllers; [L.sub.f], [C.sub.f] are the filter inductance and capacitance of SST output stage, respectively.
Simulation results when the DG unit and the DSTATCOM are connected to the distribution system under voltage
sag conditions are analyzed in section III.
The simulation diagram of the existing Cockcroft Walton Voltage
Multiplier is given in Fig.
The conventional passive voltage
doubler  circuit is shown in Figure 1.
The circuit topology of the proposed single-phase AC voltage
regulator is given in Fig.
The SM is equivalent to a controlled voltage
source: when T1 is on and T2 is off, the output voltage
[U.sub.SM] is [U.sub.c]; when T1 is on and T2 is off, the output voltage