Last Thursday (15), the ONS (National Electric System Operator) presented a study carried out by PSR and Daimon on the creation of the DSO (Distribution System Operator). This study is based on the need to seek observability, controllability and ability of GD (distributed generation) which has brought a series of inconveniences in the operation of the basic network, mainly in the forecast of the net load (gross load discounted from distributed generation).
The international vision was initially presented, where different communication arrangements between the agents holding the REDs (Distributed Energy Resources) are used. Among the arrangements, a good part had the REDs communicating with the TSO (Transmission System Operator) itself and with the DSO to help the network with services and dispatch modulation.
The alternative defined in the study was that the TSO would only talk to the DSO ed by the distributors. The latter would be responsible for controlling the REDs (MMGD included). During the debate it was mentioned that the MMGD could be seen as Gizmo, who at the beginning of Spielberg's film (Gremlins from 1984) was very cute but at the end, with the increase in network penetration, transformed into a Gremlin with destructive and chaotic behavior.
The current view of MMGD is that it is the great villain of the electricity sector and that it needs to be tamed at any cost. It is important to that distributed generation expanded by following the rules and was not exposed to water or food after midnight. Perhaps, contrary to what happened in the film, the sun's radiation in Brazil made it increasingly stronger compared to other countries. Law 14300/22 removed the existing incentive for full compensation, significantly limiting the expansion of MMGD.
We know that the intermittency of renewable sources brings a series of problems to the operation of transmission and distribution networks, but resolving the issue by creating a DSO that, in addition to operating the network, will define the MMGD dispatch seems to be a centralizing alternative without the of agents.
It is interesting to note that there is no concern about calling on agents to monitor studies and collaboratively discuss solutions to address the problem that we are all aware of. In many countries, aggregators end up monitoring the generation and load of their customers in a given region, providing information to the distributor and even collaborating with actions to control voltage and active power.
It is important to note that many of these actions are ed by price signals (with energy prices being updated every 15 minutes) issued by the market. We understand that the problem we face today could be much smaller if we had advanced in the Brazilian electricity sector model.
Questions: Is it the DSO who will take the action to turn off the MMGD? Is it the DSO who will define the period of charging and discharging the agents' batteries?
The opinions and information expressed are the sole responsibility of the author and do not necessarily represent the official position of the author. Canal Solar.
