Direct current transmission system control method and system based on adaptive active disturbance rejection proportional integral

A DC transmission system, proportional and integral technology, applied in the direction of power transmission AC network, etc., can solve the problems of not considering discrete system, not suitable for improving the commutation failure of DC transmission system, etc.
CN110752616APending Publication Date: 2020-02-04NARI TECH CO LTD +4
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NARI TECH CO LTD
Publication Date
2020-02-04

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Abstract

The invention discloses a direct current transmission system control method and system based on adaptive active disturbance rejection proportional integral. The method comprises the following steps of: performing discretization processing on an active disturbance rejection proportional integral controller to obtain an adaptive active disturbance rejection proportional integral controller; and realizing constant current control of a rectification side and constant turn-off angle control of an inversion side in a direct current system based on the adaptive active disturbance rejection proportional integral controller. According to the direct current transmission system control method and system disclosed by the invention, the adaptive active disturbance rejection proportional integral controller is applied to the constant current control of the rectification side and the constant turn-off angle control of the inversion side in the direct current system, so that the dynamic response speedand the robustness of the system in response to large-range disturbance are improved, and the continuous commutation failure in the high-voltage direct current transmission system is effectively suppressed.
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Description

technical field

[0001] The invention relates to the technical field of DC transmission system control, in particular to a DC transmission system control method and system based on adaptive active disturbance rejection proportional integral. Background technique

[0002] HVDC transmission is widely used due to its outstanding advantages in the field of cross-regional, large-capacity, and asynchronous grid interconnection transmission. It has important strategic significance for promoting my country's "west-east power transmission, north-south mutual supply, and national networking". However, the thyristor based on semi-controlled device commutation cannot be turned off by controlling the gate level, and needs to rely on the power grid voltage to restore the blocking ability. Therefore, commutation failure has become a key factor to curb the continued development of DC transmission. In January, DC commutation failures occurred 20 times due to AC faults in East China. With the...

Claims

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