Power-system economic dispatching method considering power grid topology optimization

Abstract

The invention discloses a power-system economic dispatching method considering power grid topology optimization. A power-system dispatching model using active power of conventional generator sets and output component states of the power grid as decision making factors is provided by incorporating the power grid topology optimization into a power-system economic dispatching model and considering the power grid topology connectivity conditions. Topological connectivity is constrained based on the minimum cutset concept in graph theory so as to judge system topological connectivity. The provided model is solved by combination of genetic algorithm and linear programming primal-dual path following interior algorithm. Conventional generator sets and power grid topology can be preset, economical efficiency of power grid operation is improved on the premise of guaranteeing safety of power grid operation, balance capacity of load power of system generation is improved, renewable energy power generation can be accepted within a larger range, abandonment of renewable energy power generation or load shedding is effectively alleviated, and technical support is provided for intelligent development for power system dispatching.

Description

technical field [0001] The invention relates to the field of electrical engineering, in particular to a power system economic dispatch method for power system short-term operation dispatch considering power grid topology optimization. Background technique [0002] Power system economic dispatch is mainly to cope with changes in load and non-dispatchable power supply, with the goal of system operation economy, while satisfying the physical and technical constraints of system operation, to optimize the active power of conventional generator sets in advance and promote power generation. Balance with the load according to the predicted trajectory, which is essentially an economic decision for power generation to follow the load under the fixed grid structure. Under the new situation, with the continuous advancement of the competition mechanism of the electricity market, the power load presents a diversified development, and renewable energy such as wind and solar power generatio...

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Problems solved by technology

The economic dispatch mentioned in the above patents is an economic decision-making of power generation tracking load under a fixed grid structure. In fact, the topology of the power system has a certain optimization space. Ignoring this feature in the dispatch decision-making will inevitably lead to the conservatism of the dispatch decision-making, especially in the Under the new situation, the contradiction between the source and the grid is becoming more and more prominent, and the problem of transmission congestion often occurs. Under this background, if the traditional dispatching decision-making method is still used, it is inevitable to abandon renewable energy generation or load shedding.

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