National power

National power is defined as the sum of all resources available to a nation in the pursuit of national objectives.

Elements of national power

National power stems from various elements, also called instruments or attributes; these may be put into two groups based on their applicability and origin - "national" and "social".

Geography

Important facets of geography such as location (geography), climate, topography, and size play major roles in the ability of a nation to gain national power. Location has an important bearing on foreign policy of a nation. The relation between foreign policy and geographic location gave rise to the discipline of geopolitics.

The presence of a water obstacle provided protection to nation states such as Great Britain, Japan, and the USA and allowed Japan to follow isolationist policies. The presence of large accessible seaboards also permitted these nations to build strong navies and expand their territories peacefully or by conquest. In contrast, Poland, with no obstacle for its powerful neighbours, even lost its independence as a nation, being partitioned among the Kingdom of Prussia, the Russian Empire, and Austria from 1795 onwards till it regained independence in 1918.

Electrical grid

An electrical grid is an interconnected network for delivering electricity from suppliers to consumers. It consists of generating stations that produce electrical power, high-voltage transmission lines that carry power from distant sources to demand centers, and distribution lines that connect individual customers.

Power stations may be located near a fuel source, at a dam site, or to take advantage of renewable energy sources, and are often located away from heavily populated areas. They are usually quite large to take advantage of the economies of scale. The electric power which is generated is stepped up to a higher voltage at which it connects to the electric power transmission network.

The bulk power transmission network will move the power long distances, sometimes across international boundaries, until it reaches its wholesale customer (usually the company that owns the local electric power distribution network).

On arrival at a substation, the power will be stepped down from a transmission level voltage to a distribution level voltage. As it exits the substation, it enters the distribution wiring. Finally, upon arrival at the service location, the power is stepped down again from the distribution voltage to the required service voltage(s).