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.