Electric Operation
Mid-Term Horizon
The electric operation planning process originates two products: the Mid-Term Electric Operation Plan (PEL) and the Guidelines for the Electric Operation with Quarterly Horizon (Quarterly).
The 2015 PEL presented the BIPS’s electric power performance assessments for the period between January 2016 and April 2017. Studies show the evolution of the regional interconnections capacity, with the entry into operation of 22 new500 kV circuits, totaling 6,300 km lines associated with Belo Monteplant, to the North / Northeast and Northeast / Southeast interconnections, and the 500 and 440 kV network of the Madeira River plantsflow. Thebest anticipation reinforcement alternatives were evaluated to manage a possible delay of the entry into operation of Araraquara 2 - Taubatétransmission line. Besides, the connection of six additional generation units at Santo Antônio plant, the integration through temporary connection and the planned configuration of the plants of Teles Pires River, and the progress of supplysystemsto Manaus and Macapáwere evaluated.
Other points are worth mentioning such as the integration of wind sources and the need for thermal generation due to transmission constraints and the supply to the BIPS electric areas, which resulted in a proposal with operational solutions in addition to the identification of a set of extremely important works that eliminate constraintsregarding generation or load supply. Among these, it can be highlighted the recommendation to advance the Belo Monte’s first DC Bipole to the end of2017 second semester, currently scheduled to February 2018, in order to increase the generated energy flow capacity the Northern and Northeastern Regions.
The increasing share of wind generation in the Brazilian electric energy matrix, reflected by the deployment of about 800 MW parks in the Southern Region and 7,000 MW in the Northeastern Region, totaling about 15,000 MW to be installed in April 2017, requires robust structural solutions in the Main Grid to enable the flow of all this generation. Furthermore, wind generation forecasting associated with the scheduling process and dispatching should be improved. The variability and intrinsicunpredictability of wind power generation from winds bring major challenges for system operation.
The Electric Power Operation Guidelines Report detailed, for each four-month period, the operational measures required to meet the standards and criteria established in the Grid Procedures, in order to match the electric restrictions and the load supply with the energy policies,aiming at a loweroperation cost and maximum operational security.
In the 2015studies, the implementation of a cyclical alternative for the production flow of Teles Pires’first units supplying Manaus Area stood out, as well as the usage of operational measures to increase the North-South interconnectionlimits, face to the loss of large generation amounts in the Southern, Southeastern and Midwestern Regions.
Short-Term Horizon
Throughout 2015, ONS developed studies and implemented cyclical measures that allowedoperating the electric power grid in accordance with the continuity reliability and supply quality criteria established in the Grid Procedures. Several guidelines were established, to enable receiving high amountsby the SoutheasternRegion from both Itaipu, SouthernRegion and Northern and Northeastern Regions, and also to explore the full installed capacity of Santo Antônio and Jirauplants, through the usage of the DC Bipole that flows these Madeira river plants’power, associated with the operation of several Southeastern / Midwestern subsystem’hydro plants with small number of machines, keeping this subsystem’senergy condition from getting any worse.
This year, the analysis of interventions process involved about 44,000 disconnections requests regarding the BIPS’s operation network equipment. This activity aims at meeting the agents' maintenance needs, defining the necessary operational measures, meeting the standards and criteria established in the Grid Procedures, matching the electric constraints and meeting the load supply with energy policies, thus aiming at the lowest operation cost and maximum operational security.
In the monthly planning various assessments regarding the BIPS’s electric performancewere prepared, which suggested measures in the following areas:
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