Quantities associated with each bus in a system, Work involved (or) to be performed by a load flow study

**STATEMENT OF POWER FLOW PROBLEM**

**Quantities associated with each bus in a system**

Each bus in a power system is associated with four quantities and they are real power (P), reactive power (Q), magnitude of voltage (V), and phase angle of voltage (δ).

**Work involved (or) to be performed by a load flow study**

(i). Representation of the system by a single line diagram

(ii). Determining the impedance diagram using the information in single line diagram (iii). Formulation of network equation

(iv). Solution of network equations

**Iterative methods to solve load flow problems**

The load flow equations are non linear algebraic equations and so explicit solution as not possible. The solution of non linear equations can be obtained only by iterative numerical techniques.

**Mainly used for solution of load flow study**

The Gauss seidal method, Newton Raphson method and Fast decouple methods.

**Flat voltage start**

In iterative method of load flow solution, the initial voltages of all buses except slack bus assumed as 1+j0 p.u. This is referred to as flat voltage start

Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail

Power System Analysis : Power Flow Analysis : Statement of Power Flow Problem |