Power Generation Planning With Past Time-Section Output Correction
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Solution Overview
Problem
The challenge is to shorten the computation time for constructing a power generation plan that meets sharply changing demand, particularly with power generators having small output ramp rates, as the number of parameters to be optimized increases with the length of the planning period, leading to prolonged calculation times.
Innovation Solution
A power generation planning apparatus that includes an output range calculation unit, an output calculation unit, and a previous time section output correction unit, which calculates and corrects power generator outputs to satisfy operational constraints, thereby reducing the number of parameters to be optimized and shortening the computation time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the planning period is extended to optimize power generator outputs across multiple time periods, then the power generation plan can meet sharply changing demand, but the computation time increases due to the increase in the number of parameters to be optimized
Solution Approach 1:
The patent divides the power generation planning problem into two distinct stages: (1) an optimization stage that determines the optimal output for each power generator across multiple time periods, and (2) a verification stage that checks whether the optimized outputs satisfy operational constraints. This segmentation allows the system to first obtain candidate solutions through optimization without considering constraints, then efficiently verify constraint satisfaction, thereby reducing overall computation time while maintaining plan quality.
Solution Approach 2:
The patent performs preliminary optimization to determine candidate power generator outputs before verifying operational constraints. By conducting the optimization phase first without the computational burden of constraint checking during optimization, the system obtains initial solutions that can then be efficiently verified in a separate phase, thus reducing the total computation time required for multi-period planning.
2Adaptability or versatility
If the number of parameters to be optimized is increased to cover multiple time periods, then the power generation plan can address sharply changing demand, but the device complexity increases
Solution Approach 1:
The patent segments the complex multi-parameter optimization problem into two simpler sub-problems: an optimization sub-problem that determines generator outputs across multiple periods, and a verification sub-problem that checks constraint satisfaction. This segmentation reduces the apparent complexity of the overall system by separating the optimization function from the constraint verification function, making the device more manageable despite handling multiple time periods.
Solution Approach 2:
The patent introduces an intermediary verification mechanism that acts as a mediator between the optimization results and the operational constraints. Instead of directly embedding complex constraint checks within the optimization process, the system uses a separate verification unit to check whether the optimized outputs satisfy constraints, thereby simplifying the overall device architecture while maintaining adaptability to changing demand.
3Productivity
If thermal power generators with small output ramp rates are used to meet sharply changing demand, then the power supply can match demand fluctuations, but the output needs to be adjusted in advance, increasing the complexity of multi-period optimization
Solution Approach 1:
The patent performs preliminary optimization to determine the output schedule for thermal power generators with small ramp rates before verifying operational constraints. By conducting the optimization phase first, the system can determine in advance the required output adjustments for these generators, then verify in a separate phase whether the ramp rate constraints are satisfied, thereby managing the complexity of multi-period optimization more effectively.
Solution Approach 2:
The patent divides the optimization process into distinct stages, allowing the system to first determine the optimal output schedule for thermal power generators across multiple periods, then separately verify whether the output adjustments satisfy ramp rate constraints. This segmentation simplifies the handling of generators with small output ramp rates by separating the scheduling decision from the constraint verification.
Data Source
AI summary
This power supply and demand planning device includes: an output range calculation unit that calculates the output range of a power generator that satisfies a plurality of restriction conditions; a power generation output range output calculation unit that calculates the power generator output in a single cross section on the basis of the calculated output range calculated; and a past specified cross section output correction unit that calculates a target output in the single cross section when a restriction condition violation occurs in the power generator output in the calculated single cross section calculated, and in order to eliminate a restriction condition violation, corrects the output range and the power generator output in the single cross section and a past cross section further in the past than the single cross section so that the power generator output in the single cross section becomes the target output.