Injecting bus powers in running power flow

[obokopok andrew]

Hi
I am using the following to inject 200 MW and 100MVARs at bus 2 of a simple
two bus system, but it is not having any impact on the outcome of the power
flow reults. What instruction format should I use to implement bus power
injection for a power flow:

    define_constants;

    mpc = loadcase('casemazi2');

    mpc.bus(2, PD) =200;

    mpc.bus(2,QD)=-100;

    runpf(casemazi2);



Regards

Andrew