Microgrid Power Management Using Asset Headroom Compensation
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Solution Overview
Problem
Microgrid control systems face challenges in maintaining optimal operating points due to inaccuracies in forecast variables, leading to potential power imbalances and non-optimal operations.
Innovation Solution
The system modifies operating point values for controllable assets based on asset-specific headroom and total power offsets, allowing for adjustments to compensate for deviations between forecast and actual values, without requiring additional communication between the Power Management System (PMS) and Energy Management System (EMS).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If operating point values are modified to compensate for forecast deviations, then power balance is maintained, but system complexity increases
Solution Approach 1:
The compensation is applied locally to specific operating point values of individual assets rather than requiring system-wide recalculations. Each asset's operating point is adjusted by a specific compensation amount based on its contribution to the total power offset, simplifying the overall control architecture
Solution Approach 2:
The system changes the parameter of operating point values by adding compensation amounts. This straightforward parameter adjustment approach avoids complex control logic while effectively maintaining power balance through simple arithmetic modifications to the operating points
2Reliability
If operating point values are adjusted frequently to maintain optimality, then optimal operation is maintained, but computational costs increase
Solution Approach 1:
The system applies partial adjustments to operating point values by using compensation amounts that are proportional to the forecast deviation. Rather than recalculating optimal operating points from scratch, the system applies targeted partial corrections, reducing computational burden while maintaining near-optimal operation
Solution Approach 2:
The system uses simple parameter changes (adding compensation amounts) instead of complex optimization recalculations. This approach maintains operational quality while significantly reducing computational costs by avoiding repeated full optimization computations
Data Source
AI summary
A method of controlling a microgrid comprises receiving, by a power management system, PMS, of the microgrid, operating point values for a plurality of controllable assets. The method comprises determining, by the PMS, an asset headroom. The method comprises determining, by the PMS, a modified operating point value that is dependent on the received operating point value of the controllable asset, the determined asset headroom of the controllable asset, and a total power offset of the microgrid. The method comprises controlling, by the PMS, the controllable assets for which the modified operating point values have been determined in accordance with the modified operating point values.