Battery Dynamic Power Flow Control for Grid Services
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current battery energy storage control systems do not effectively address the localization of solar renewable energy sources, optimize battery capacity size, or shape power consumption profiles in real time, limiting their ability to provide grid services such as voltage regulation and demand management.
Innovation Solution
A battery dynamic power flow control system that includes a top-level controller managing battery modules and power electronics in a grid, communicating with Battery Management Systems (BMS) to shift and shape power consumption patterns, optimize battery capacity, and provide real-time grid services like voltage regulation and demand management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If battery energy storage systems are controlled using conventional BMS and EMS, then basic battery management functions are provided, but the systems cannot effectively address localization of solar renewable energy sources, optimize battery capacity size, or shape power consumption profiles in real time
Solution Approach 1:
The control system is divided into two distinct components: a local controller that handles real-time dynamic control of power flow, battery charging/discharging, and power consumption shaping; and a remote controller that provides supervisory control, monitoring, and communication via the Internet. This segmentation allows the system to achieve advanced adaptability for grid services while distributing complexity across separate functional modules.
Solution Approach 2:
The local controller acts as an intermediary between the battery energy storage system, solar renewable energy sources, and the electrical grid. It mediates real-time power flow control, coordinating charging/discharging operations and power consumption shaping without requiring direct complex intervention from the remote controller, thus enabling advanced grid services while managing system complexity.
2Productivity
If real-time dynamic control of power flow is implemented, then power consumption profiles can be shaped and grid services provided, but system complexity and control requirements increase
Solution Approach 1:
The local controller implements dynamic real-time control of battery charging and discharging operations based on varying grid conditions, solar energy availability, and power consumption requirements. This dynamic control enables efficient power flow management and power consumption profile shaping while keeping the control logic localized, avoiding the need for complex centralized control systems.
3Reliability
If battery systems operate as passive components, then system simplicity is maintained, but ability to provide active grid services such as voltage regulation and demand management is limited
Solution Approach 1:
The local controller continuously monitors grid conditions, battery state of charge, and power consumption patterns, using this feedback to dynamically adjust battery charging/discharging operations and power flow control. This feedback mechanism enables the battery system to actively provide grid services such as voltage regulation and demand management while maintaining reliable and stable grid operation.
Data Source
AI summary
A distributed control system uses a central controller in Internet communication with a local controller to manage grid tie attachment with a battery to form an integrated battery energy storage system (BESS). The BESS is capable of charging or discharging the battery, as well as correcting grid phase with volt amp reactive (VAR) leading or lagging operation modes. Examples shown include simple BESS charging and discharging, BESS integrated with renewable energy sources (here photovoltaic), and direct current fast charge (DCFC) connections with an electric vehicle.