Region power distribution network on-line simulation analysis device and system

Abstract

The invention discloses a region power distribution network on-line simulation analysis device and system. The device comprises a main distribution network modeling unit for establishing a main distribution network integrated module according to main grid data and power distribution network data; a tie switch selection unit for selecting two loop closing lines for loop closing operation in a power distribution network and tie switches; a topology forming unit for forming a topological relation of loop closing contact lines according to the loop closing lines and the tie switches; a parameter input unit for inputting parameters of the power grid; a loop closing point selection unit for selecting loop closing points according to the parameters; a load flow calculation unit for calculating load flow distribution of the two sides of a loop closing switch of the loop closing points according to the topological relation of loop closing contact lines and the load flow data; a loop closing current calculation unit for calculating loop closing surge current and steady-state current according to the load flow distribution; and a judgment and reminding unit for comparing the loop closing surge current and steady-state current calculating result with loop closing conditions, and giving reminding information for whether to carry out loop closing operation. The device and system allow the power distribution network to be good in operation safety and high in reliability.

Description

technical field [0001] The invention relates to the field of power system distribution networks, in particular to an online simulation analysis device and system for regional distribution networks. Background technique [0002] With the continuous improvement of the grid structure of the modern power system, the power operation mode is increasing. In order to further improve the reliability of the grid operation section, reduce the network loss, improve the load capacity and utilization efficiency of the network, and make the mutual supply capacity stronger, in the current power grid A large number of ring networks have been established in the system, so that the power distribution network can meet the needs of various operation modes. [0003] The power supply on both sides of the distribution network is generally in a split operation state when the loop closing operation is performed. Often due to the existence of the bus or line voltage difference on both sides of the loo...

AI Technical Summary

Problems solved by technology

However, in some cases, if the loop closing operation is performed, a large loop closing current may be generated, which may cause the protection device to malfunction or exceed the rated value of the equipment, and affect the safe and reliable operation of the distribution network.

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