Electrical Infrastructure big enough to cope, small enough to care
Established in 1977 by Mike Wilsmore and Derek Earby, the founding directors saw an opportunity in the high voltage installation market, where we could offer an alternative to the local electricity board for private customers.
The initial projects were small scale, installing 11,000 volt and 415/230 volt distribution systems to companies based in and around South West England.
The scope of this work expanded quickly, enabling us to grow rapidly. Today we can manage any electrical installation project up to and including 132,000 volts, from initial design to final commissioning and testing, Powersystems can offer the complete electrical distribution package.
An electrical grid, electric grid or power grid, is an interconnected network for delivering electricity from producers to consumers. It consists of:
- generating stations that produce electric power
- electrical substations for stepping electrical voltage up for transmission, or down for distribution
- high voltage transmission lines that carry power from distant sources to demand-centers
- distribution lines that connect individual customers
Power stations may be located (for example) near a fuel source or at a dam site (to take advantage of renewable energy sources), and are often located away from heavily-populated areas. The electric power which is generated is stepped up to a higher voltage at which it connects to the electric power transmission net.
The bulk-power transmission network will move the power long distances, sometimes across international boundaries, until it reaches its wholesale customer (usually the organisation 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).
Electrical grids vary in size from covering a single building through national grids (which cover whole countries) to transnational grids (which can cross continents).
Although electrical grids are widespread, as of 2016 1.4 billion people were not connected to an electricity grid.
Electrical grids can be prone to malicious intrusion or attack; thus, there is a need for electric grid security. Also as electric grids modernize and introduce computers, cyber threats also start to become a security risk. Particular concerns relate to the more complex computer systems needed to manage grids with a large proportion of intermittent renewable-energy sources in the electricity mix.