A blackout that occurred in the early hours of Tuesday (14) interrupted around 10 thousand MW of load and affected the country's four subsystems — South, Southeast/Central-West, Northeast and North.
According to the MME (Ministry of Mines and Energy), the failure in the SIN (National Interconnected System) began at 0:32 after a fire in the reactor at the Bateias Substation, in the Metropolitan Region of Curitiba (PR).
According to the National Electric System Operator (ONS), estimated losses were 1.600 MW in the South, 1.900 MW in the Northeast, 1.600 MW in the North, and 4.800 MW in the Southeast/Central-West. In the last three regions, the Regional Load Relief Scheme (ERAC) was involved in stabilizing the system.
The ONS reported that, having identified the incident, it initiated joint action with industry agents to restore power and called a technical meeting today. The Operator also proposed a preliminary analysis of the disruption and highlighted that it will begin preparing the RAP (Disruption Analysis Report) by Friday (17).
What does the ONS say?
“The National Electric System Operator (ONS) confirms that this Tuesday, October 14, at 0:32, there was an incident in the National Interconnected System (SIN) that caused the interruption of approximately 10.000 MW of load, affecting the four subsystems: South, Southeast/Central-West, Northeast and North.
The incident began with a fire in a reactor at the Bateias Substation in Paraná, shutting down the entire 500 kV substation and leading to the opening of the interconnection between the two regions. At the time, the South region was exporting approximately 5.000 MW to the Southeast/Central-West.
In the South region, there was a loss of approximately 1.600 MW of load. In other regions, the Regional Load Relief Scheme (ERAC) was in operation. In the Northeast, the interruption was approximately 1.900 MW, in the North, 1.600 MW, and in the Southeast, 4.800 MW.
As soon as the situation was identified, the ONS (National Health System) initiated joint action with the authorities to restore power to the regions. The equipment was returned and the loads were restored safely within the first few minutes, and within 1 hour and 30 minutes, all loads in the North, Northeast, Southeast, and Central-West regions were restored. Loads in the South region were fully restored approximately 2 hours and 30 minutes after the incident.
A meeting with key stakeholders is scheduled for today. The ONS is also expected to hold a preliminary Disturbance Analysis meeting to begin preparing the Disturbance Analysis Report (RAP) by Friday, October 17th.
What does the MME say?
“At 00:32 a major disturbance occurred in the National Interconnected System, with the shutdown of approximately 10.000 MW of loads, in a controlled manner (through the action of the Regional Load Relief Scheme – ERAC).
The incident began with a fire in a reactor at the Bateias Substation (Paraná) that shut down the entire 500 kV substation, disinterconnecting the South and Southeast/Central-West regions, causing severe contingency.
The equipment was returned and the loads were restored in a controlled manner within the first few minutes. By 1:30 a.m., all loads in the North, Northeast, Southeast, and Central-West regions had been restored. Loads in the South region were fully restored by around 2:30 a.m.
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An answer
Dear all, the other recent blackout was caused, according to ANEEL (National Energy Agency), also supported by the ONS (National Health System), by the instability of renewable energy sources, pointing the finger, particularly at wind and solar power, at the so-called flow reversal. Now, the new blackout occurred in the early morning hours with minimal demand. What will they say? Since they can't point to them as the villains? They forget to mention that the problem is characteristic of predictive and preventive maintenance, leading to undesirable corrective maintenance. One of the causes is also the lack of investment in transmission lines. We know that the technical staff responsible for energy planning, coordination, and selective protection are very competent and, I believe, discuss the safety and stability of the SIN (National Interconnected System) day and night. After all, it is their primary function. We await, if they ever do, a publication on what actually caused the damaging blackout. Engineer, professor, and master of science in electrical engineering.