Black start is the process that restarts an electric power station or a part of an electric power grid into the operation to recover from unexpected complete or partial shutdown without depending on external electrical power grid or substations. Power stations have a diesel generator as black start unit to recover it from unexpected blackout.
Requirement of Black Start In Electric Power House
Suppose an electric power station named alpha does not have black start unit. After some years the whole system get shutdown due to any unexpected unknown fault on a part of transmission grid. Workers went there and disconnect that faulty part then, now there every power stations need to restart to recover the shutdown including alpha power station but it does not have black start unit so operators of alpha power station have to wait to get supply from power grid to start which increases shutdown time of the alpha power station.
As we know increase in shutdown time also increases losses of the power station that’s why black start is required in an electric power station to minimize both power and wealth loss.
Procedure of Black Start
The procedure or steps to start an electric power station with black a start unit must be as mentioned below.
- A battery starts a small diesel generator installed in generating station.
- This power is used to bring the generating station into operation.
- Transmission grid is energized.
- This power is used to start other generating stations of the power system.
Here, small diesel generator is the black start unit. In this way a black start unit is used to bring generating station of power system into operation.
Limitation of Black Start
Conclusion
Hope, you have clearly understand about the black start, the reason why black start is required in electric power house and it’s procedure or step. Make sure to leave your opinion about this post in the comment section below.