A method and apparatus for automatic power regulation of a power grid suitable for open-loop power supply based on depth-first search of a strongly connected component

Abstract

The invention relates to a power network automatic regulation method suitable for open-loop power supply based on the depth-first search of a strongly connected component. The method comprises the following steps: step S1, setting corresponding ordered elements to instantiate a directed graph by collecting the operation conditions of the power supply network. 2, adopt a depth-first search algorithm to analyze and calculate that strongly connected component in real time. Step S3, according to the requirement of changing the operation mode, the depth-first search algorithm is adopted to simulateand calculate the brand-new strongly connected components after changing the operation mode. 4, after confirming that that simulation result is feasible, issue a fast automatic power regulation command to complete the power regulation operation. The ordered elements include: a circuit breaker, which is used to change the structure of the diagram; a transformer, internal strongly connected component; a bus, a supplementary parameter of a strongly connected component used to check that structure of a graph.

Description

technical field [0001] The invention relates to an automatic power regulation method of a power grid suitable for open-loop power supply based on depth priority search of strongly connected components, and belongs to the field of stable, safe and reliable power supply operation of a large power grid under an open-loop operation mode. Background technique [0002] With the strengthening of the 500 kV grid and the continuous expansion of the scale of the 220 kV grid in the region. The 220 kV power grid's hierarchical and zonal operation is inevitable for the development of the power grid. Through the hierarchical and partitioned operation of the power grid, it can not only solve the thermal stability problem caused by the power flow transfer of the 500 kV and 220 kV electromagnetic ring network in the line N-1 or N-2 mode, and give full play to the power transmission capacity of a higher voltage level, but also can The structure of the power grid is clear and hierarchical, wh...

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Problems solved by technology

[0003] When the substations belonging to different partitions operate in loop closure, because the impedance and power flow distribution of different paths are different, and there are large differences, there will be a large phase angle difference at both ends of the loop closure switch, and the circulating current is too large. It will also cause equipment overload or even switch trip

In order to avoid this kind of situation, this kind of ring closing method generally adopts the principle of breaking first and then making it, which will cause short-term power outages for users and affect the continuity of power supply.

Frequent power outages not only reduce the electricity sales of power companies, but also greatly reduce customer satisfaction and even lead to legal disputes

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