Heatwave Pushes Romania's Power Demand Toward 8,000 MW — NRG-IA

Romania is entering two evenings of high electricity consumption amid a heatwave that has triggered a Red Alert across most of the country. The National Power Grid Dispatcher (DEN) estimates a peak of approximately 8,000 MW during the evening hours of Monday, June 29, and Tuesday, June 30, prompting Transelectrica to implement preventive measures to keep the transmission grid available at maximum capacity. The concrete measure announced by the operator is the cancellation of scheduled maintenance outages. In practice, this means keeping equipment online that was slated to be temporarily unavailable for planned works, allowing the transmission grid to better handle electricity flows during peak demand hours. The announcement does not indicate a confirmed power shortage, nor does it warn of imminent blackouts. Transelectrica specifies that it has gradual operational measures prepared, which can be applied depending on demand evolution and real-time system operating conditions, to maintain the balance between generation and consumption. 8,000 MW represents instantaneous demand, not daily consumption The 8,000 MW figure must be interpreted correctly. Megawatts (MW) measure the power demanded by consumers at a specific moment, not the energy consumed over an entire day. It is the level of demand that the system must cover simultaneously through power plants, batteries, imports, and the grid. For the transmission system operator, the challenge is not just having enough energy generated in Romania or available through regional exchanges. That energy must be moved, in real time, through high-voltage lines and substations to the areas where consumption is rising. In a power system, generation and consumption must be kept in constant balance. Any discrepancy between the energy fed into the grid and that used by consumers affects system frequency, forcing the dispatcher to intervene with fast-acting resources. This is why grid capacity and equipment availability become just as important as the installed capacity of power plants. The heatwave pushes demand into the evening, just as solar generation fades Extreme temperatures simultaneously drive up consumption across households, commercial spaces, offices, and industry due to the use of air conditioning and cooling systems. This pressure does not ease immediately after sunset, especially during tropical nights when homes and buildings remain warm and cooling demand persists. The National Meteorological Administration (ANM) issued a Red Alert from June 29, 10:00 AM to July 1, 10:00 AM, covering Banat, Crișana, Maramureș, Transylvania, Moldova, Oltenia, and the western half of Muntenia. Meteorologists estimate maximum temperatures between 35 and 41 degrees Celsius, with tropical nights and severe thermal discomfort. For Bucharest, the special forecast indicates temperatures of around 39 degrees Celsius on Monday and Tuesday, with overnight lows of 20–23 degrees and the temperature-humidity index exceeding the critical threshold. This is the combination that complicates power system operations in the summer: consumption remains high in the evening, precisely when solar generation begins to drop rapidly. The gap must be covered by hydro and nuclear generation, flexible thermal plants, stored energy, imports, and balancing resources available in the market. This does not mean solar energy is a problem. It means that a system with increasing solar capacity requires resources that can quickly ramp up to meet demand after sunset, alongside a grid capable of transporting energy from generation hubs to consumption centers. Why Transelectrica is keeping all equipment available During normal periods, lines, transformers, and other transmission grid installations are temporarily taken out of service for scheduled maintenance, upgrades, or technical interventions. On days with extreme temperatures and high consumption, every planned outage reduces the operator's room for maneuver. Transelectrica decided to cancel some of these scheduled outages precisely to keep the infrastructure available at maximum capacity and to mitigate the additional risks associated with the heatwave. In parallel, the operator has strengthened monitoring and intervention capabilities through the National Power Grid Dispatcher, territorial transmission branches, and substation personnel. The decision highlights that thermal stress does not only affect power plants. The grid must transmit large volumes of energy while consumption rises, all while equipment operates in a high-temperature environment. Keeping all elements available increases system redundancy and reduces the risk of a localized incident escalating. 1,500 MW of new capacity helps, but not all MW are created equal on a hot summer evening Transelectrica points out that since the beginning of the year, approximately 1,500 MW of new power plants and storage facilities have been commissioned, including around 1,000 MW in the last month alone. Looking…