GRID FREQUENCY REGULATION

High frequency inverter front stage output

The high-voltage output generated by the front-stage transformer passes through the high-frequency transformer to output high-frequency alternating current, and then a high-frequency hundreds of V direct current is output to the back-stage mosfet/IGBT through the fast recovery diode full bridge rectification, and then the back-stage IC generates 50Hz control signal which is used to control the work of the mosfet/IGBT of the subsequent stage, and then output 120v/ 220v/ 230v/ 240v V 50/60Hz alternating current. [pdf]

Grid adaptability of solar inverters

This research focuses on the discussion of PV grid-connected inverters under the complex distribution network environment, introduces in detail the domestic and international standards and requirements on grid-connected inverter grid adaptability, and then analyzes in depth the impacts of the access point voltage changes, access point frequency changes, and access point harmonic changes on the inverters. [pdf]

Safety requirements for grid connection of energy storage power stations

This document specifies the general requirements for connecting electrochemical energy storage station to the power grid and the technical requirements of power control, primary frequency regulation, inertia response, fault ride-through, operational adaptability, power quality, relay protection and automatic safety device, dispatching automation and communication, simulation models and for test and assessment of connecting to the power grid. [pdf]

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