QUESTION 1
a) List three important applications of symmetrical components in industry.
b) What are the key benefits of symmetrical components.
c) What is the impact of negative sequence voltages on induction motors.
d) List and describe three types unbalanced loads in industry.
1.under normal conditions, only positive sequence components will be present.
2.during unsymmetrical faults, the loads are unbalanced. So calculations are complex.so three phase analysis is required.
3. To simply the calculations symmetrical component method is used. Here system is divided into three types of components.
a.positive sequence components.
b. Negative sequence components.
c.zero sequence components.
4. By using negative sequence components, protective devices are designed.
5.unbalanced loads occured due to different faults.
a. L-G fault.
b.L-L fault.
c.LLG fault.
d.LL and LG fault.
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