UHVDC line wide-band corona current sensor fills the measurement gap at home and abroad

Due to the advantages of low cost and small power loss, UHVDC transmission has unparalleled advantages in long-distance, large-capacity power transmission and non-synchronous interconnection of regional power grids, and has been vigorously developed
in recent years.
In order to meet the growth of China's electricity load, improve the structure of the power grid, and implement the strategy of "west-to-east power transmission, north-south mutual supply, and national interconnection", it is imperative to develop an ultra-high voltage power grid
.

The electromagnetic environment caused by the stun of UHVDC lines not only restricts the selection of conductors and structural parameter design of transmission lines, but also often brings environmental protection problems
.
With the improvement of environmental protection and energy saving and consumption reduction requirements of transmission lines, it is far from meeting the engineering needs of the electromagnetic environment of transmission lines to study the electromagnetic environment of transmission lines by relying only on the measurement and analysis of corona effects such as audible noise, radio interference and corona loss.

The traditional corona current measurement system has a low measurement bandwidth, and the measurement performance is far from meeting the research needs of audible noise, radio interference and corona loss of UHVDC transmission lines with increasing voltage levels, so it is necessary to measure the corona current of UHVDC transmission lines in a wide frequency domain and study the broadband characteristics of corona current, so as to provide technical support
for the fine control of electromagnetic environment of UHVDC lines in China.