Energy Resource Controller for Grid Stabilization
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Solution Overview
Problem
Conventional power systems face challenges in maintaining the optimal state of charge of energy storage devices, leading to reduced lifespan and potential damage due to excessive charging or discharging, as well as communication delays and bandwidth limitations that hinder timely response to grid stabilization needs.
Innovation Solution
A power system comprising an energy resource controller that monitors the state of charge of energy storage devices and controls power input/output to stabilize the grid by connecting a power absorbing load when the state of charge exceeds or falls below predetermined limits, and adjusts power rates to prevent overcharging or over-discharging, thereby extending the operational life of energy storage devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the state of charge of energy storage devices is not properly monitored and controlled, then the power grid can be stabilized, but the lifespan of energy storage devices is reduced and damage can occur
Solution Approach 1:
The energy resource controller continuously monitors the state of charge of energy storage devices and adjusts power input/output accordingly. This closed-loop feedback mechanism ensures that the state of charge remains within optimal limits, preventing overcharging and over-discharging that would reduce device lifespan, while simultaneously maintaining power grid stabilization.
Solution Approach 2:
The system establishes predetermined upper and lower state of charge limits before operation begins. By proactively controlling power flow to keep the state of charge within these pre-defined boundaries, the system prevents harmful conditions before they occur, extending device lifespan while maintaining grid stability.
2Speed
If communication bandwidth is increased to enable timely response to grid stabilization needs, then response time is reduced, but system complexity and cost increase
Solution Approach 1:
The energy resource controller is pre-configured with upper and lower state of charge limits and authorization parameters before operation. This preliminary setup enables the controller to make immediate local decisions about power input/output based on real-time state of charge measurements, eliminating the need for complex real-time communication protocols while achieving rapid response to grid stabilization needs.
Solution Approach 2:
The controller autonomously monitors its own state of charge and self-regulates power input/output operations based on pre-configured parameters and real-time conditions. This self-service capability eliminates dependency on complex external communication systems, enabling fast local response while reducing system complexity.
Data Source
AI summary
A power system for providing a grid service to a power grid, said power system comprising: an energy resource controller (ERC) adapted to monitor a state of charge (SOC) of at least one energy storage device (ESD), wherein said energy resource controller (ERC) adjusts in a normal operation mode (NM) a power supplied by the energy storage device (ESD) to said power grid (PG) or a power received by the energy storage device (ESD) from said power grid (PG) in response to grid parameters or remotely generated control signals to stabilize said power grid (PG), wherein if the monitored state of charge (SOC) of said energy storage device (ESD) exceeds an upper state of charge limit (SOC-H) the energy resource controller (ERC) connects in a power absorption mode (PAM) a power absorbing load (PAL) to said power grid as long as the grid parameters or remotely generated control signals indicate that power is to be removed from said power grid (PG).