Generation Plan Time Adjustment for Lower-Cost Unit Commitment
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Solution Overview
Problem
Current power generation planning methods are inefficient due to increased calculation time as the number of scenarios considered increases, especially when dealing with uncertainties in demand and variable renewable energy, leading to suboptimal generation plans and economic inefficiencies.
Innovation Solution
A power generation planning apparatus that calculates a generation plan with a shorter time interval by adjusting the start and stop initiation times of electric generators, using a power generation information calculation unit, a power generation plan calculation unit, and a power generation plan adjustment unit to minimize total power generation cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of scenarios considered increases to account for uncertainties in demand and variable renewable energy, then the reliability of the generation plan improves, but the calculation time increases
Solution Approach 1:
The patent segments the generation plan calculation into multiple scenarios representing different uncertainty levels. Each scenario is calculated separately and then aggregated to form a comprehensive generation plan that accounts for demand uncertainty and variable renewable energy without requiring exhaustive calculation of all possible scenarios simultaneously
Solution Approach 2:
The patent changes the parameter of scenario representation from considering all possible combinations to using a limited set of representative scenarios with different probability weights. This parameter change allows the system to capture uncertainty effects while maintaining computational feasibility
2Manufacturing precision
If the time interval of the generation plan is shortened to capture moment-to-moment changes, then the manufacturing precision of the generation plan improves, but the calculation time increases
Solution Approach 1:
The patent divides the time interval into discrete sections and applies scenario-based calculation to each section. This segmentation allows the system to maintain short time intervals for precision while using scenario aggregation to reduce the overall computational burden across the entire planning horizon
Solution Approach 2:
The patent applies partial action by calculating generation plans for a selected subset of time intervals rather than all possible intervals. This approach maintains sufficient precision for critical periods while reducing calculation time for less critical periods
Data Source
AI summary
A power generation planning apparatus that calculates a generation plan which is a plan of starting and stopping and output power of electric generators. The apparatus includes an information calculation unit that calculates demand and supply of electric power, a plan calculation unit that calculates the generation plan of the starting and stopping and the output power of the electric generators by using, as an input, the generation information calculated by the information calculation unit, and an adjustment unit that calculates a generation plan with a time interval shorter than the generation plan by adjusting a starting initiation time and/or a stopping initiation time of the electric generator in the generation plan such that total power generation cost is reduced by using, as inputs, the generation plan calculated by the plan calculation unit and generation information with a time interval shorter than the generation plan.