If the reduction in the node voltage
corresponds to the reduction of the reactive power of the node, the network is considered to be stable.
One node voltage
is plotted along the X-axis of a Cartesian coordinate system on the scope, and the other against the Y axis ([V.sub.1], as voltage at one node--X axis, and [V.sub.2] as the voltage at the second node--Y axis).
The DAQ card records the node voltage
[V.sub.node] and resistor voltage [V.sub.R].
A MATLAB code is written for the node voltage
equations (Q, [Q.sub.B]) of MOSFET operating in the subthreshold region [19, 20].
Taking some node voltage
of the 33-node main feeder is overlimited as a consequence of the excess of photovoltaic power at some time.
i is branch number, N is total branch numbers, [K.sub.i] is the state of switch (0 means open state and 1 means close state), [R.sub.i] is the resistor of branch i, [P.sub.i] and [Q.sub.i] are the active and reactive power of branch i, and [U.sub.i] is the up-layer node voltage
of branch i.
The solved system calculates all network node voltage
probability distributions which can be analyzed for power quality.
With no sharing dead time circuit of the boost converter synchronous rectifier, the switch node voltage
can be allowed to fully commutate to get ZVS turn-on of Q3 at the chosen operating point with a dead time of approximately 40 ns.
The node voltage
equations are set up for the time discretization circuit
The first order cumulant is expected of node voltage
; the second order cumulant is the variance.
The theorem can be deduced easily from the node state rule and node voltage
rule, so details are omitted here.
The impedance here is the ratio of actual node voltage
change to the total dynamic current drawn by ICs at any frequency point.