Measuring point system for sending offshore wind power direct current out of land converter station

Abstract

The invention discloses a measuring point system for sending offshore wind power direct current out of an onshore converter station, which is characterized in that outgoing lines are collected at the outgoing line end of a transformer of each onshore converter station and then accessed into a 500kV alternating current bus string, and then an electromagnetic voltage transformer is configured at the outgoing line collection position as a network side voltage measuring point; an electronic voltage transformer is configured at a valve side converging position of a transformer of an onshore converter station as a valve side voltage measuring point, so that the problem that a measuring point arrangement mode of an onshore converter station of an existing offshore wind power flexible direct-current power transmission system adopts a mode of directly accessing a power grid alternating-current string without converging is solved; the technical problems of measuring point selection, measuring point switching, grid-side reactive power control selection and inconsistent multi-transformer tap position adjustment exist in the prior art.

Description

technical field [0001] The invention relates to the technical field of offshore wind power flexible direct current transmission systems, in particular to a measuring point system for sending offshore wind power direct current to an onshore converter station. Background technique [0002] Offshore wind power has the advantages of high utilization hours of power generation and good quality of wind energy. It is a new energy power generation technology with great conditions for large-scale development and commercialization prospects. DC transmission technology is currently the most mainstream transmission technology for the development of large-capacity wind farms in the deep sea. With the increase of transmission capacity, considering the equipment manufacturing capacity, there will be a multi-transformer parallel operation structure in the converter stations at the sending and receiving ends of the offshore wind power flexible DC transmission system. complex. [0003] The o...

AI Technical Summary

Problems solved by technology

[0007] The invention provides a measuring point system for offshore wind power direct current transmission to land converter stations, which is used to solve the problem that the existing measuring point arrangement method of the land converter station of the offshore wind power flexible direct current transmission system is directly connected to the power grid without collection In the way of AC string, there are technical problems such as measuring point selection, measuring point switching, grid-side reactive power control selection and multi-transformer tap gear adjustment inconsistency.

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