DC power control method inhibition multi-feed-in DC commutation failure

A multi-infeed DC, commutation failure technology, applied in reactive power compensation, AC network circuit, AC network voltage adjustment, etc., can solve the problem of system transmission power drop, failure to consider successive commutation failures, poor economic efficiency of auxiliary equipment, etc. problem, to achieve the effect of fast and accurate control, convenient realization and fast control speed
CN108695879AActive Publication Date: 2018-10-23SICHUAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SICHUAN UNIV
Publication Date
2018-10-23

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Abstract

The invention discloses a DC power control method inhibition multi-feed-in DC commutation failure. A simplified model of a multi-feed-in DC power transmission system is established, start of DC powercontrol is determined on the basis of sin-cos component detection method, further the DC power adjustment amount and DC power control rate are determined, and DC power control in different commutationfailure scenes is carried out according to the DC power adjustment amount and DC power control rate. The control method is high in control speed, accurate, convenient to realize, good in control effect and high in economic performance, does not need wide area measurement data or extra investment, and does not interfere operation of other equipment.
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Description

technical field

[0001] The invention relates to the technical field of high-voltage direct current transmission, in particular to a direct current power control method for suppressing multi-infeed direct current commutation failures. Background technique

[0002] Commutation failure is one of the most likely faults in DC transmission systems. In the converter, if the valve that exits conduction fails to recover the blocking ability during a period of time when the reverse voltage is applied, or the commutation process is not completed during the reverse voltage, when the valve voltage becomes positive, The commutated valve will commutate to the valve originally scheduled to withdraw from conduction. This situation is called commutation failure.

[0003] The main reason for the commutation failure is that the AC system failure causes the commutation bus voltage on the inverter side to drop. Under certain conditions, some commutation failures can be automatically recovered, b...

Claims

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