220kV power grid partitioning optimization method considering connection channel switch state

Abstract

The invention relates to a 220kV power grid partitioning optimization method considering connection channel switch states; the method comprises the following steps: 1, obtaining all feasible switch states of connection channels in the 220kV power grid; 2, using an improved heredity algorithm to freely combine and calculate various switch states of the connection channels, thus obtaining the optimal switch state combined mode: 21, obtaining an initial load proportionality D0 according to the initial opening and closing data of 220kV power grid connection channel switches; 22, building a partitioning optimization model according to all feasible switch states; 23, using a roulette form to improve heredity algorithmic intersecting and variation operations, and solving the partitioning optimization model so as to obtain the switch state with the highest fitness and the corresponding partitioning mode. Compared with the prior art, the 220kV power grid partitioning optimization method is scientific and efficient, can improve efficiency, can improve accuracy, and can set indexes.

Description

technical field [0001] The invention relates to the technical field of transmission network planning and operation, in particular to a 220kV power grid partition optimization method considering the switching state of a communication channel. Background technique [0002] With the continuous development of China's transmission grid, urban interconnected grids will inevitably encounter new challenges while effectively alleviating transmission pressure, enhancing system stability, and resisting small disturbances. Among them, the emergence of 500 / 220kV high and low voltage electromagnetic ring network and the increase of short-circuit current level in 220kV system are two significant problems. In order to open the high-voltage and low-voltage electromagnetic ring network, the grid structure needs to be adjusted to limit the increase in the short-circuit current level caused by the system interconnection and capacity increase. The method of replacing the circuit breaker cannot b...

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Problems solved by technology

Therefore, although the majority of academic institutions and power-related departments have paid more attention to the regional operation and interconnection support of the power grid, and listed them as key research topics, and have done a lot of fruitful research and development work, the existing methods and strategies are far from theoretical. Perfection, there are problems in the scientificity and practicality of engineering

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