Share with your Facebook friends! The Phase II power line is operated by National Grid and stretches hvac transmission system pdf Monroe New Hampshire to the Massachusetts border. Endpoint-to-endpoint long-haul bulk powertransmission without intermediate taps, for example, in remote areas.
Increasing the capacity of an existing power grid in situations where additional wires are difficult or expensive to install. Reducing the profile of wiring and pylons for a given power transmission capacity, as HVDC can carry more power per conductor of a given size. Stabilizing a predominantly AC power grid without increasing the maximum prospective short-circuit current. HVAC transmission lines of similar power.
HVDC line compared to three for three-phase HVAC. Long undersea AC cables have a high capacitance. The East West Interconnector includes a 262 km high voltage cable link of which 186 km runs subsea. In addition, AC poweris lost to dielectric losses. AC, because for a given power rating, the constant voltage in a DC line is lower than the peak voltage in an AC line.
This voltage determines the insulation thickness and conductor spacing. AC transmission and allows transmission line corridors to carry a higher power density. While there has been some concern in the past regarding possible harmful effects of such fields, including the suspicion of increasing leukemia rates, the current scientific consensus does not consider ELF sources and their associated fields to be harmful. DC electric field gradients between the conductors and ground.