Multi-resource coordination control method and apparatus for direct current block fault impact alternating current channel

Abstract

The invention provides a multi-resource coordination control method and apparatus for a direct current block fault impact alternating current channel. Static state stability limit of the alternating current channel is determined firstly; then the multi-resource coordination control sequence and coordination control quantity are determined; and finally, multi-resource coordination control is realized. By virtue of the technical scheme provided by the invention, multiple types of control resources of pumping, storing and pump switching, direct current power emergency modulation, accurate load shedding, and load shedding are taken into comprehensive consideration, so that control means are increased; the target function of a multi-resource coordination control model takes the minimum of the load shedding quantity as the optimization object, and constraint conditions are taken into consideration, so that control effectiveness is improved, control cost is lowered, and power grid defensive performance is improved; and in addition, by adoption of a heuristic algorithm, the multi-resource coordination control sequence and the multi-resource coordination control quantity are obtained, and the multi-resource coordination control quantity obtained by adopting the heuristic algorithm is high in interpretability, so that relatively high practicability can be realized.

Description

technical field [0001] The invention relates to the technical field of ultra-high voltage direct current, in particular to a multi-resource coordination control method and device for direct current blocking faults impacting an alternating current channel. Background technique [0002] With the gradual construction and operation of large-capacity UHV DC, China has formed a larger-scale regional interconnection power system, but it is in the transition period of construction, and there are still relatively weak AC channels compared with strong DC. In the future, the power grid will invest in multiple outgoing and fed-in UHV DC lines, and some UHV AC connection sections will be relatively weak, showing the characteristics of strong direct and weak AC as a whole. If a DC blocking fault occurs, it will cause a large-scale power flow transfer, which may make the weak AC channel more stable and cause transient instability in the power grid, affecting the safe and stable operation o...

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Problems solved by technology

[0010] In order to overcome the shortcomings of insufficient single resource effectiveness and excessive prevention and control cost in the above-mentioned prior art, the present invention provides a multi-resource coordinated control method and device for DC blocking fault impact AC channel, firstly determine the static stability limit of the AC channel; Then, according to the multi-resource coordination control model that satisfies the constraint conditions, the multi-resource coordination control sequence and coordination control amount are determined; the multi-resource coordination control model includes an objective function constructed with the goal of minimizing load shedding, and the constraint conditions are determined according to the static stability limit of the communication channel ;Finally, realize multi-resource coordinated control according to multi-resource coordinated control sequence and coordinated control amount

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