Electricity Adjustment Control for Reference-Value Crossing
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Solution Overview
Problem
In the context of virtual power plants, fluctuations in renewable energy generation cause command values for electricity supply and demand to deviate from reference values, leading to instantaneous burden on energy resources when these values are crossed, resulting in a short period of time that is less burdensome for the system.
Innovation Solution
An electricity management apparatus with a processor that executes a program to control the adjustment system, allowing it to maintain the reference value when the command value transitions from a first to a second value, thereby extending the period of time that is less burdensome for the system by controlling the speed of change and ensuring linear transitions when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the command value transitions directly from a first command value to a second command value when renewable energy generation fluctuates, then the system responds quickly to changes, but the period of time that is less burdensome for the system becomes extremely short
Solution Approach 1:
The control device performs preliminary action by detecting when a command value transition will cross the reference value, and proactively controls the transition speed to maintain the reference value for a predetermined period. This advance planning allows the system to prepare for the transition in a way that extends the low-burden period, rather than simply reacting to the fluctuation.
Solution Approach 2:
The system dynamically adjusts the transition speed of the command value based on whether the transition would cross the reference value. When crossing is detected, the speed is controlled to maintain the reference value; when crossing doesn't occur, normal transition speed is used. This dynamic adjustment optimizes both response speed and the duration of low-burden periods.
2Productivity
If the command value transitions quickly to track renewable energy fluctuations, then the system maintains up-to-date supply and demand alignment, but the reference value is instantly passed through reducing the beneficial period
Solution Approach 1:
The control device performs preliminary detection of the transition path before execution, identifying when a command value change would cross the reference value. By planning the transition in advance and controlling the speed appropriately, the system ensures the reference value is maintained for the predetermined period while still achieving the overall supply and demand adjustment goal.
Solution Approach 2:
The control device continuously monitors the command value transition and detects whether it would cross the reference value. Based on this feedback, it adjusts the transition speed in real-time to maintain the reference value for the required period, then allows normal transitions afterward. This feedback mechanism balances productivity with extended reference value maintenance.
3Reliability
If the system maintains strict control to extend the low-burden period, then energy resources experience less stress, but the complexity of the control system increases
Solution Approach 1:
The control device uses preliminary detection to identify transitions that would cross the reference value, then applies a predetermined control strategy for these specific cases. For transitions that don't cross the reference value, the system uses normal control. This preliminary classification approach extends the low-burden period without requiring complex continuous adjustment mechanisms throughout all operations.
4Stability of the object's composition
If the command value transitions linearly from first to second command value, then the transition is smooth and predictable, but the period of time maintaining the reference value is reduced
Solution Approach 1:
The system dynamically adjusts the transition profile based on the detected crossing condition. When a transition would cross the reference value, the speed is controlled to maintain the reference value for a predetermined period, creating a non-linear transition with a plateau. When crossing doesn't occur, linear transition is used. This dynamic approach prioritizes extending the reference value period while maintaining smooth transitions.
Data Source
AI summary
An electricity management apparatus (an aggregator server, an electricity generation business operator server) is an apparatus that manages adjustment power of electricity delivered to an electricity transmission and distribution business operator by a trading business operator (an aggregator, an electricity generation business operator). The electricity management apparatus is capable of controlling an adjustment system of supply and demand of electricity and includes: a memory that stores a predetermined program therein; and a processor that executes the predetermined program. The processor controls, by executing the predetermined program, the adjustment system so as to go through a period of time of maintaining a reference value of supply and demand of electricity by the adjustment system in a case where the reference value is crossed when a command value of supply and demand electricity to the adjustment system transitions from a first command value before change to a second command value after change.