Safety checking method for power distribution network containing distributed power supply

Abstract

The invention discloses a safety checking method for a power distribution network containing a distributed power supply. The safety checking method of the invention comprises steps of collecting data, obtaining a voltage rated value, a voltage difference limited value and a circuit long-term allowable carrying capacity, determining a total number of elements requiring N-1 scanning, disconnecting the element to generate a topology structure of a new power distribution network, generating illumination intensity and wind speed data, calculating practical active power and reactive power of a photovoltaic cell array and a wind driven generator, calculating a node voltage out-of-limit probability and a branch current out-of-limit probability, and outputting a safety checking result. The power distribution network safety checking method containing distributed power supply can perform safety checking on the power distribution network while considering the output random influence of the distributed power supply and has a certain guidance meaning to safety regulation and control of a scheduling department after large scale grid connection of the distributed power supply.

Description

technical field [0001] The invention belongs to the technical field of safety checking, and in particular relates to a safety checking method of a distribution network including a distributed power supply. Background technique [0002] The purpose of safety check is to predict the operating status of the system after the expected accident according to the N-1 principle based on the system operating data, such as short-term load forecasting and power generation plan data, and to check the operating constraints. Once the limit is exceeded, the Issue a warning so that corrective actions can be taken to ensure safe and stable system operation. With the large-scale grid-connection of distributed power sources, there is an urgent need for a safety verification method for distribution networks including distributed power sources. On the basis of considering the randomness of distributed Dispatch control of distribution network. [0003] Scholars at home and abroad have carried ou...

AI Technical Summary

Problems solved by technology

However, with the large-scale grid-connection of distributed power generation, the randomness of distributed power generation has brought huge challenges to the dispatching department. The traditional deterministic security check method can no longer effectively adapt to the large-scale grid-connection of distributed power generation. The safety verification requirements of the distribution network in the future

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