Electricity_generation_transmission_and.pdf (original) (raw)

Describe briefly, giving some measuring features and illustrative arguments, a typical electrical transmission/distribution system. You may draw a simplified diagram of such a system to support your answer, describe each component. What is the term (name) used to refer to such system. Also, suggest who would be the best custodian of such a system and explain why ? Figure 13: Transmission line connected to one another The diagram above shows a typical transmission line that is interconnected with one another. This is commonly known as the grid, or in UK, more specifically known as the national grid. There are 3 stages that separate this transmission and distribution system. The generation stage, the transmission stage and the distribution stage.

Karady, George G. “Transmission System” The Electric Power Engineering Handbook

The purpose of the electric transmission system is the interconnection of the electric energy producing power plants or generating stations with the loads. A three-phase AC system is used for most transmission lines. The operating frequency is 60 Hz in the U.S. and 50 Hz in Europe, Australia, and part of Asia. The three-phase system has three phase conductors. The system voltage is defined as the rms voltage between the conductors, also called line-to-line voltage. The voltage between the phase conductor and ground, called line-to-ground voltage, is equal to the line-to-line voltage divided by the square root of three. .1 shows a typical system.

ELECTRIC POWER DISTRIBUTION SYSTEMS

This chapter provides an overview of electrical distribution network and systems. The primary substation is the load center taking power from the transmission or subtransmission network and distributes electricity to customers via the distribution network consisting of cables/OHL and customer substations. Various power system components, like Circuit breaker, OHL, cables, and secondary equipment like protection relay, distribution automation are presented. The distribution system from planning, design, implementation, operation and maintenance is also described. The performance features of the distribution systems in terms of a number of measurable indices are highlighted.

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