Load Flow Analysis Or Power Flow Analysis

Sachu Technologies offering Power Flow study &Load flow studies determine if system voltages remain within specified limits under normal or emergency operating conditions, and whether equipment such as transformers and conductors are overloaded.


A load flow study should be performed during the planning design stages of a power system and when evaluating changes to an existing system. A load flow study calculates the voltage drop on each feeder, the voltage at each bus, and the power flow and losses in all branch and feeder circuits.

This study involves measurement of

  1. Active Power (KW), all phases & equivalent
  2. Apparent Power (KVA) equivalent
  3. Reactive Power (KVAr)
  4. Power Factor (pf)
  5. Currents , all phases and equivalent
  6. Voltages , Line to Line and equivalent
  7. THDS (V) and THD (I)
  8. Dominant Harmonics Optimize component or circuit loading
  9. Develop practical bus voltage profiles
  10. Identify real and reactive power flow
  11. Minimize kW and kVar losses
  12. Develop equipment specification guidelines
  13. Identify proper transformer tap settings
  14. The most important information obtained from the load flow analysis is the voltage profile of the system. If voltage varies greatly over the system, large reactive flows will result. This, in turn, will lead to increased real power losses and, in extreme cases, an increased likelihood of voltage collapse. When a particular bus has an unacceptably low voltage, the usual practice is to install capacitor banks in order to provide reactive compensation to the load. Load flow studies are used to determine how much reactive compensation should be applied at a bus, to bring its voltage up to an appropriate level. If new lines (or additional transformers) are to be installed, to reinforce the system, a power flow study will show how it will relieve overloads on adjacent lines. An inefficient or unbalanced load can also cause unpredictable behavior in your localized power grid, increasing the risk of equipment damage and unplanned outages.

    It shall help to determine how the system will operate in normal cycle and emergency conditions and during different parts of day or Week. P.F compensation system, Automatic or fixed installed in the network are also checked for their effect in the network.

    The Load flow analysis has following advantages

    1. Helps in future planning and present day operations by showing how the electrical system will perform during normal, emergency and various time slots of day or any period may be week or month as defined by the consumer.
    2. It helps in minimizing energy cost by determining the location and size of power factor correction capacitors on each load
    3. Helps in determining the proper voltage selection through transformer tap settings so that the correct voltage will be present in the network.
    4. Determining the capacity utilization of major Loads.
    5. Suggestion for improvement in Network efficiency