Which power plant have minimum running cost?

The power plant with the minimum running cost is a nuclear power plant. Nuclear power plants use nuclear fission to generate electricity, which is a very efficient process. In addition, nuclear power plants do not require any fuel to operate, so the only costs associated with running a nuclear power plant are the costs of maintenance and safety.

Other than that Nuclear power is one of the cleanest and most efficient ways to generate electricity. Nuclear power plants don't produce greenhouse gases, and they use less fuel than other types of power plants. So while they might not be the cheapest to build, their running costs help lower electricity bills long-term.

Solar and wind power are also relatively inexpensive to operate, but they are intermittent sources of energy, so they cannot always be relied upon to generate electricity when it is needed. Hydroelectric power is also a relatively inexpensive source of energy, but it is only available in areas with abundant water resources.

Finally, thermal power plants are the most expensive to operate, as they require large amounts of fuel to generate electricity.