A thermal or steam power plant is a generating station which converts heat energy of coal combustion into electrical energy. A modern thermal power plant consists of a number of necessary and auxiliary equipment. In this article, we will take a look at the most important equipment of a thermal ... Read More

Electric power can be transmitted either by AC transmission system (i.e. the voltage and current are alternating) or DC transmission system (i.e. the voltage and current are direct or unidirectional). Each transmission system has its own advantages and disadvantages. Therefore, we need to discuss the technical advantages and disadvantages of ... Read More

A gas turbine power plant is the type of power generating station in which gas turbine is used as the prime mover for the generation of electrical energy.The schematic diagram of a gas turbine power plant is shown in the figure.The main components of a typical gas turbine power plant ... Read More

Electricity TariffThe electricity tariff is defined as the rate at which the electrical energy is sold to a consumer.However, the tariff should include the total cost of producing and supplying electrical energy plus the profit to the power company. In practice, the tariff cannot be same for all types of ... Read More

The power factor of the load connected to the power system considerably affects the voltage regulation and efficiency of a transmission line.Effect of Load Power Factor on Voltage RegulationThe expression for percentage voltage regulation of a transmission line, when a load of lagging power factor is connected to the system, ... Read More

Variable Load on Power StationThe load on an electric power system changes from time to time due to uncertain demands of the consumers, this variation in load of a power station is termed as variable load on power station.An electric power station is designed to meet the load requirements of ... Read More

Power FactorThe cosine of angle between voltage and current in an AC circuit is called the power factor of the circuit. In other words, the power factor is defined as the ratio of active power to the apparent power in the circuit, i.e., $$\mathrm{Power\: factor, cos\:\phi\:=\:\frac{Active\: power\: (in \:Watts)}{Apparent\: power\: ... Read More

The useful output of a power generating station is the kW output which is delivered by the station to the electrical supply system. Sometimes, a power generating station needs to deliver more kW to meet the increased power demand. This can be achieved by any of the following two methods ... Read More

Most Economical Power FactorThe value to which the power factor should be improved so as to have maximum net annual saving is called the most economical power factor.When a consumer improves the power factor, it results in reduction in his maximum kVA demand. Consequently, there will be an annual saving ... Read More

Depreciation of Power Plant EquipmentThe reduction in the value of the equipment and other property of the power station every year is known as depreciation. Therefore, a suitable amount, called depreciation charge, must be set aside annually so that by the time the life span of the power plant is ... Read More