Method for analyzing coordination and safety of protective relaying of regional power grid

Abstract

The invention relates to a method for analyzing coordination and safety of protective relaying of a regional power grid. Real-time remote measurement and communication information is acquired form an EMS / SCADA (energy management system / supervisory control and data acquisition) system, acquired real-time grid data is matched with an established grid topological structural graph, corresponding data formats are changed, and a precise initial grid model is generated; an anticipated fault set is established according to study on fault conditions and stored in a database; a fault calculation algorithm file and a check calculation rule file are imported into the database; the generated real-time grid model and the initial grid model in the database are compared, if a difference occurs, the stored anticipated fault set and a fault calculation algorithm are loaded to calculate faults of the generated precise real-time grid model, and check results are output. Auxiliary information is provided for scheduling operators to perform real-time decision making. A protection fixed value of a current regional grid protection system can be checked and estimated online, and all protective performance and stability of the system are judged in real time.

Description

technical field [0001] The invention relates to an equipment maintenance technology, in particular to an analysis method for regional grid relay protection coordination and safety by using real-time data. Background technique [0002] With the rapid development of the power system, my country's power network has gradually formed a cross-regional, large-scale modern interconnected power grid. As the first barrier to ensure the safe and stable operation of the power system, the relay protection device is the most basic and important technical means to ensure the stability of the power system. But at the same time, it is also a double-edged sword. Numerous examples at home and abroad prove that most of the large-scale system accidents involving power outages are directly or indirectly related to incorrect actions of relay protection devices. [0003] For a long time, in the actual work of the power grid, the fixed value of the relay protection device is calculated in the off-...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problem that the existing regional power grid relay protection analysis system cannot perform online verification of the protection fixed value, and proposes an analysis method for regional power grid relay protection coordination and safety. This method can not only use the real-time data of the power grid On-line checking and evaluation and early warning of the protection setting value of the regional relay protection, and can also consider factors such as multiple faults and changes in the operation mode, and use the method of fault prediction to analyze the coordination and safety and stability of the relay protection in the dynamic process Research

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