Question

Advantages of symmetrical components in power system

Answer 1

Answer:

Symmetrical Components makes solving unbalanced system conditions much simpler than using phase components. Symmetrical Components makes solving balanced three phase system conditions much more complicated than required to solve for system conditions than would be necessary using phase components.

Answer 2

Answer:

Importance of symmetrical components:

Converting a set of unbalanced phasors into sets of balanced components greatly simplifies our analysis and is helpful in performing fault calculations, power flow studies, and stability studies.

Explanation:

• Symmetrical Components: Any unbalanced three-phase system of currents, voltages, or other sinusoidal quantities can be resolved into three balanced phasors which are known as symmetrical components of the original unbalanced system.
• We can see those symmetrical components are a way of analyzing unbalanced phasors which arise due to faults. Converting a set of unbalanced phasors into sets of balanced components greatly simplifies our analysis and is helpful in performing fault calculations, power flow studies, and stability studies.
• Along with phasor values of current and voltage, the zero-sequence and negative sequence components are also an important input to protective relays that sense these values to decide the nature and type of the fault.
• For example, a zero-sequence component indicates a ground fault, while unbalanced loading leads to negative components, hence sensing these components is essential in order to efficiently protect our power system.