Good Morning All,
I am looking for any documents or information regarding how does the current grid operators in countries that have large-scale PV plants connected to its grid such as China, Germany and USA (California) deal with the variability that the renewable brings to the overall system?
I understand that each country has its own grid codes that must be met but for example if the PV plant stopped injecting power to the grid due to a fault or some change in weather conditions. What will the current grid operators do to keep the operation of the grid stable?
If anyone has a clue or an idea of what to read or where to find that information of each country. Also, does the automatic generation control plays a key role here?
Sorry for keeping it long and I appreciate the help or advice
Kinds Regards,
Abdullah
In general, if any generator stops supplying power to the grid, with the result that there is a higher demand than supply, then either some users get cut off or an alternative power source has to switch on. Conversely if the supply is higher than the demand then either excess energy goes to storage, or it goes over a long distance transmission system to someone who does want it, or it has to be dumped, or the generators have to cut back their supply. The mix of these actions is controlled by the "intelligent grid control system", which is under active development in many organisations around the world. The problem is, proving any given set of algorithms work in practice without risking massive grid instability caused by malfunction of the algorithms designed to avoid such instability!