UNE-EN IEC 62909-1:2018

This part of IEC 62909 specifies general aspects of bi-directional grid-connected power converters (GCPC), consisting of a grid-side inverter with two or more types of DC-port interfaces on the application side with system voltages not exceeding 1 000 V a.c. or 1 500 V d.c.. In the special case where GCPC provides only one DC-port interface, the connected resource shall be energy storage. It includes terminology, specifications, performance, safety, system architecture, and test-case definitions. The "system architecture" defines interaction between the inverter and converters. Requirements which are common, general, and independent of special characteristics of individual generators and storages are defined.

Typically, GCPC is connected under the main circuit breaker in an end-user s distribution board, managing energy flow to and from the grid. It has two or more energy sources for generating or charging and discharging. GCPC can decrease local power consumption by optimizing the direction and amount of power, or giving backup electricity upon power failure of the grid. This standard does not cover uninterruptible power supply (UPS) systems, which fall under the scope of the IEC 62040 series of standards.

Requirements for internal and external digital communication might be necessary; the interface requirements including communication with distributed energy resources are provided in another document. All EMC requirements are defined by reference to existing IEC standards. External communication requirements are out of scope of this International Standard.