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The flow reversal has directly impacted the development of solar energy projects throughout Brazil, especially in Minas Gerais. According to a study by greener, the state led the cases ed in the first six months of 2024, representing 76% of the total – a significant increase compared to the 63% ed in the same period of 2023.
This situation has required technical adjustments and complex negotiations with concessionaires, which has led engineers to rethink solutions to ensure the viability and efficiency of the facilities.
Among the most discussed alternatives are zero grid systems, designed to avoid exporting excess energy to the grid. Such a system adjusts generation according to the 's immediate consumption, ensuring that all electricity produced is consumed in real time.
An example of this approach is a photovoltaic project developed by Ion Energia on a farm located in the city of Uberaba (MG), which illustrates how regulatory and technical challenges can be overcome with cutting-edge engineering solutions.
The installation of the zero grid system, carried out in partnership with CS Consultoria, was the solution found to meet the client's needs in view of the restrictions imposed by the energy distributor.
Want to know more details about how customers are overcoming flow reversal with the Zero Grid system"> the full report for free in the Magazine Canal Solar and check out the detailed analysis of this solution.
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Answers of 7
Hahaha, you know what all this is? They are the big thieves in the market. I've been laughing for a long time, hahaha, Cemig, Coelba, Ceee, and others, oh my system is off grid, hahaha, I built it with batteries today, they don't even come near my doors, hahaha, people, build off grid systems, send all these thieves away, oh my, they're going to steal from their sea, hahaha
Limitations imposed by the distributor lead to a useless market reserve! That's why Brazil doesn't evolve!
This technical solution limits the inversion of the flow, but restricts the full potential availability of the energy available on site. The inversion of flow must be limited to the original capacity of the PC feeders approved by the concessionaire. As for this measure by Eneel, which limits wind and solar generation at times of low demand in the SIN, it could be used for an already established system for storage in a high reservoir with hydraulic potential. It is unspeakably stupid.
1. Zero Grid (or “zero export”) systems are designed to avoid exporting excess energy to the grid. They adjust solar (or other source) generation to instantaneous consumption, using technologies such as smart inverters, batteries or load control. True!!!
#### **Motives and Reasons for Adoption:**
– **Concessionaire Restrictions:** Technical limitations (e.g.: saturated networks), lack of regulation for compensation (net metering) or high costs for connecting traditional systems.
– **Regulatory:** Local regulations that prohibit the injection of energy into the grid without authorization.
– **Economic:** Avoid tariffs or bureaucracy associated with exporting.
### **Advantages and Disadvantages**
#### **For Entrepreneurs/Consumers:**
**Advantages:**
– **Energy autonomy:** Maximizes self-consumption, reducing dependence on the grid.
– **Cost-benefit:** Avoids costs with network upgrades or connection fees.
– **Legal simplification:** Dispenses with concessionaire approval for energy injection.
– **Sustainability:** Allows the use of clean energy even in areas with restrictions.
**Disadvantages:**
– **Potential waste:** Unstored surplus is lost (no batteries).
– **”High initial cost”:** Need for batteries or sophisticated control systems.
– **Complex optimization:** Requires precise synchronization between generation and consumption.
#### **For Dealers:**
**Advantages:**
– **Network stability:** Avoids fluctuations caused by uncontrolled injections.
– **Reduction in investments:** “There is no need to adapt the infrastructure for bidirectionality”.
**Disadvantages:**
– **Less incentive for distributed generation:** Zero Grid systems limit the contribution of microgeneration to the grid.
– **Loss of revenue:** Customers prioritize self-consumption, reducing energy purchases.
### **2. Installation by CS Consultoria: Context and Impacts**
**True?** Yes. In scenarios where the concessionaire imposes export barriers, Zero Grid is a viable solution to enable renewable energy projects.
#### **Reasons and Reasons for the Partnership:**
– **Imposed Restrictions:** The concessionaire may have denied access to the network for conventional systems.
– **Customer Need:** Seeking savings on electricity bills and sustainability, even with technical/legal limitations.
#### **Impacts for Actors:**
**For Entrepreneurs:**
– **Advantage:** Resolves the ime with the dealership, allowing immediate installation.
– **Risk:** Dependence on batteries (costs) and possible underutilization of the system during low consumption hours.
**For Dealers:**
– **Advantage:** Maintains control over the network and avoids costs with bidirectional energy management.
– **Disadvantage:** Loses opportunity to integrate distributed sources, which could alleviate peaks in demand.
### **Conclusion**
Zero Grid systems are effective in circumventing technical and regulatory constraints, but they have trade-offs:
– **Entrepreneurs:** They gain autonomy, but need to invest in storage or optimization. Projects with very high values, to date.
– **Dealers:** Preserve the network, but lose flexibility and potential revenue.
– I understand, I believe that large companies (Chinese) or dealerships could make this investment, which is so necessary for the country, Brazil, together with the state and federal government!
Energy distributors can already invest in 30% and 70% of the market, but the problem is that they want to continue investing only in the 30% and reserve the 70%. The question that remains is: Why don't they invest today in expanding access to solar energy?
Fortunately, they cannot deny projects up to 7,5KWp
Anyone who has more than one UC has the advantage of being able to distribute within this limit.
distributors are afraid of competition and use Aneel (which is nothing more than a.lob in their favor but paid for by the taxpayer)