Multi-feed-in direct-current power transmission system control optimization method and device and storage medium

Abstract

The invention discloses a multi-feed-in direct-current power transmission system control optimization method and device and a storage medium, and the method comprises the following steps: calculatinga direct-current voltage correction coefficient of a feed-in system according to a voltage measurement value of a direct-current side of each feed-in system and a voltage rated value of the direct-current side of each feed-in system; calculating a multi-feed-in mutual influence factor according to the voltage value of each DC system current conversion bus, judging whether each multi-feed-in mutualinfluence factor meets a preset interaction intensity condition or not, and obtaining a DC voltage setting value of each feed-in system low-voltage current limiting link according to a judgment result; switching the voltage value of the direct-current side of each feed-in system into a direct-current voltage setting value when any one of the feed-in systems is in an alternating current fault state; detecting the feed-in system is in a normal operation state, and enabling the direct current sides of the feed-in systems to operate according to the corresponding voltage rated values, so that theprobability of commutation failure of non-fault systems at the same time can be effectively reduced, and the commutation capability and the fault recovery capability of the multi-feed-in direct current power transmission system are improved on the whole.

Description

technical field [0001] The invention relates to the technical field of power transmission and distribution, in particular to a control optimization method, device and storage medium for a multi-feed direct current transmission system. Background technique [0002] With the maturity of DC transmission technology and the rapid development of my country's economy, the level of network construction of the power grid has been continuously improved. China's HVDC transmission technology started late, but developed rapidly. Since the Zhoushan DC transmission project was put into operation in 1987, the research and development of my country's high-voltage DC transmission technology has been improved by leaps and bounds. For countries with advanced DC transmission projects, the requirement for long-distance and large-capacity power transmission makes multi-infeed DC transmission inevitable. [0003] The so-called multi-infeed DC refers to the concentration and placement of multiple D...

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Problems solved by technology

[0004] Embodiments of the present invention provide a control optimization method, device and storage medium for a multi-infeed direct current transmission system, which can effectively solve the problem of successive phase commutation failures in multiple circuits of direct current transmission lines in the prior art, affecting power transmission and causing unstable operation of the system problem, to improve the commutation capability and fault recovery capability of the multi-infeed DC transmission system as a whole, so as to effectively improve the stability of the system

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