Technical Specification for Grid-Forming Power Conversion System

This document, Q/KHSN 030—2024, is an enterprise standard issued by Xiamen Kehua Digital Energy Technology Co., Ltd., effective from September 5, 2024. It specifies technical requirements for grid-forming power conversion systems (GFM-PCS) used in electrochemical energy storage power stations. The scope covers basic requirements, functional and performance requirements, safety, electromagnetic compatibility, inspection rules, and packaging, storage, transportation, and storage. Key definitions distinguish grid-forming systems, which maintain voltage and frequency with voltage source characteristics, from grid-following systems. Performance requirements include four-quadrant active and reactive power control, with active power adjustable from -100% to 100% of rated power, deviation within ±2%, response time under 500 ms, and charging/discharging switching under 300 ms. Normative references include GB/T and DL/T standards for power quality, electromagnetic compatibility, and grid connection. The standard ensures reliable operation, grid support, and compliance with industrial environments, applicable to Kehua's products.