T/CES 222-2023 New energy multi-station short-circuit ratio analysis early warning and auxiliary decision-making system function specification

Scope

Scope: This document specifies the functional positioning, functional architecture, and functional requirements of the short-circuit ratio analysis, early warning, and decision-support system for new energy multi-station sites. This document is applicable to the design, development, and application of the short-circuit ratio analysis, early warning, and decision-support system for new energy multi-station sites. Main technical content: With the rapid increase in the installed capacity and output share of new energy, a high proportion of new energy will pose serious challenges to grid safety, mainly manifested as a decline in grid robustness and the emergence of various stability issues after the increase in new energy penetration. The national mandatory standard GB38755-2019, "Guidelines for the Safety and Stability of Power Systems", explicitly requires that the short-circuit ratio of new energy stations should reach a reasonable level. Under the background of the construction of a new power system, many high-penetration new energy grid-connected regions in China have seen a high rate of non-compliance with the short-circuit ratio requirements of new energy multi-station sites, with significant fluctuations due to changes in grid modes. Therefore, it is urgent to study, develop, and deploy a short-circuit ratio analysis, early warning, and decision-support system for new energy multi-station sites. Therefore, it is urgent to formulate functional specifications for the short-circuit ratio analysis, early warning, and decision-support system for new energy multi-station sites, to provide technical guidance for the calculation, early warning, and improvement of control decision-making for new energy multi-station sites, and to ensure the safe and stable operation of stations and systems while achieving full integration of renewable energy.

Development Information

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