High Frequency Controller for Grid Stability
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Solution Overview
Problem
The integration of renewable and non-renewable distributed energy resources in electric power balancing areas leads to instability due to intermittent power generation and inefficient power management, causing potential power outages and grid instability.
Innovation Solution
A method utilizing high-frequency controllers that continuously receive time-synchronized phasor measurements and real-time energy levels to determine and dispatch power set points, maintaining stable frequency and voltage in the grid through hierarchical control algorithms, thereby regulating power flow without relying on droop control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If droop control is used to adjust power output in response to frequency deviations, then frequency regulation is achieved, but the system reacts passively and cannot proactively prevent instability caused by intermittent renewable energy generation
Solution Approach 1:
The control system performs preliminary actions by continuously monitoring phasor measurements and energy levels to predict and prevent frequency deviations before they occur. The high-frequency controller dispatches power set points proactively based on real-time system state, rather than reacting after deviations occur as in conventional droop control.
Solution Approach 2:
The system implements continuous feedback by receiving time-synchronized phasor measurements and real-time energy levels from distributed energy resources. This feedback loop enables the controller to dynamically adjust power set points based on actual system conditions, improving both stability and operational effectiveness.
2Reliability
If high-frequency controllers with time-synchronized phasor measurements are implemented, then proactive power flow control and grid stability are achieved, but device complexity and control system architecture become more complex
Solution Approach 1:
The control system is segmented into hierarchical levels with high-frequency controllers at the local level handling real-time phasor measurements and power dispatch, while lower-frequency controllers manage slower dynamics. This segmentation allows complex control functions to be distributed across multiple independent components, managing overall system complexity.
Solution Approach 2:
The high-frequency controller performs multiple functions including receiving and processing time-synchronized phasor measurements, monitoring real-time energy levels, calculating optimal power set points, and dispatching commands to distributed energy resources. This multi-functionality consolidates control capabilities into a single versatile component.
3Adaptability or versatility
If conventional droop control is used for frequency regulation, then simple control logic is maintained, but the system cannot effectively manage mixed renewable and non-renewable energy resources with different response characteristics
Solution Approach 1:
The control system dynamically adapts to different energy resource types by continuously monitoring their actual response characteristics and adjusting power set points accordingly. The high-frequency controller modifies control parameters in real-time based on the mixed portfolio of renewable and non-renewable resources, enabling effective management of diverse energy sources with varying inertia and response speeds.
Data Source
AI summary
Systems, methods, and computer program products are described for controlling power of a balancing area having a plurality of distributed energy resources of a power system. A high frequency controller having a memory and at least one data processor of one distributed energy resource of the balancing area continuously receives (i) data including a phasor data stream having time-synchronized phasor measurements derived from the plurality of distributed energy resources of the balancing area and (ii) real-time energy levels of the plurality of distributed energy resources. The high frequency controller determines a power set point pair having a desired frequency set point and a desired voltage set point based on a combination of the real-time energy levels and the time-synchronized phasor measurements. The high frequency controller continuously dispatches the power set point pair to the plurality of distributed energy resources to enable control and/or monitoring of a frequency component of the phasor data stream.