Energy Management System for Grid Stability Under Communication Failures
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Solution Overview
Problem
In power supply grids with increasing renewable energy sources, the instability and volatility of energy resources pose challenges for maintaining grid stability and ensuring sufficient capacity, particularly due to unreliable communication links between energy resource controllers and control units, which can lead to energy resources becoming ineffective in contributing to the grid.
Innovation Solution
An energy management system that monitors communication links and calculates predicted operation behaviors of energy resources, allowing other resources to adjust and compensate, ensuring collective power supply through distributed energy management policies, even when communication is lost or limited, by utilizing local and global optimizations based on historical and real-time data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If distributed energy resources are connected to the power supply grid to increase renewable energy generation, then the energy supply capacity and sustainability are improved, but the grid stability and control reliability deteriorate due to communication link failures
Solution Approach 1:
The control unit calculates the predicted operation behavior of energy resources in advance, before communication failures occur. This allows the system to prepare compensation strategies proactively, so when communication is lost, the pre-calculated predictions can be used to maintain grid stability without immediate control input.
Solution Approach 2:
The system continuously monitors communication link status and uses this feedback to dynamically adjust control strategies. When communication failure is detected, the feedback mechanism triggers the use of predicted operation behaviors to compensate for the loss of real-time control, thereby maintaining grid stability.
2Reliability
If communication monitoring and prediction calculations are implemented to maintain grid stability during communication failures, then the grid resilience is improved, but the system complexity and computational requirements increase
Solution Approach 1:
Energy resources are assigned predicted operation behaviors that enable them to autonomously maintain their operation during communication failures. The resources essentially serve themselves by following pre-calculated prediction trajectories, reducing the need for complex real-time control algorithms during failure conditions.
Solution Approach 2:
The system changes the operational parameters of energy resources from real-time controlled values to predicted values based on pre-calculated operation behaviors. This parameter substitution simplifies the control system during communication failures, as it replaces complex real-time control with simpler prediction-based control.
3Productivity
If energy resources continue operation during communication failures based on predicted behavior, then the energy contribution and productivity are maintained, but the measurement precision and control accuracy decrease
Solution Approach 1:
The system applies partial control by using predicted operation behaviors for only the critical parameters that need to be maintained during communication failures, rather than attempting to control all parameters with full precision. This allows energy resources to continue contributing productively while accepting reduced accuracy in non-critical control aspects.
Data Source
AI summary
An energy management system of a power supply grid includes at least one control unit (CU) connected to distributed energy resource controllers (ERC) of energy resources (ER) of the power supply grid by means of a communication network, (CNW) wherein the control unit (CU) monitors communication links (CL) between the control unit (CU) and the energy resource controllers (ERC) via the communication network (CNW), and wherein the control unit (CU) is adapted to calculate a predicted operation behavior of an energy resource (ER) controlled by an energy resource controller (ERC) if a loss of communication or a communication bandwidth limitation of the monitored communication link to the energy resource controller (ERC) is detected.