Grid code

Contents of a grid code vary depending on the transmission company's requirements. Typically, a grid code will specify the required behavior of a connected generator during system disturbances. These include voltage regulation, power factor limits and reactive power supply, response to a system fault (e.g. short-circuit), response to frequency changes on the grid, and requirement to "ride through" short interruptions of the connection.

There is not a common grid code in all countries and each electric grid has its own grid code. Even in North America, there is no grid code that applies to all territories.

Independent power producers

All generators including Independent power producers like photovoltaic power stations or wind farms have to comply with the grid code.