It can be seen from part C in figure 1 when wind power is
accessed into the system, the random factors of system
increase which makes the probability of nodal voltage
exceeding its own limitations increases.
As shows from part D in figure 1 that while wind power
and solar power access in the system, reliability of the nodal
voltage is higher than just accessing wind power. This is
because wind and solar power are generally complementary in
certain areas, more solar energy during the day and the wind
increasing in the evening and at night. For the use of
complementary between the two energy, the two power plants
simultaneously accessed to system can reduce the impact of
volatility only wind farm in the system.
In part B in figure 1, it shows when taking into account
the correlation among the nodes the probability of node 17
exceeding its own limitations increases great.