Local Energy Management for Mixed Assets in Grid Services
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Solution Overview
Problem
Existing power generating systems at local sites are limited in their ability to expand power and revenue capabilities and provide grid services due to their operation as single-purpose systems, lacking integration and management of mixed power sources.
Innovation Solution
A local energy management system (LEMS) that integrates and manages a mixture of power generating assets, including EVSEs, FESs, and LGRs, to receive energy objectives, process raw data, generate set points, and control operations to meet grid service requirements, enabling power transfer between local assets and the grid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed energy storage systems operate as single-purpose systems dedicated to specific services, then reliability for that specific service is improved, but adaptability and versatility are worsened
Solution Approach 1:
The system enables fixed energy storage systems to perform multiple functions by dynamically switching between different grid services (frequency regulation, voltage support, peak shaving, demand response) based on real-time grid conditions and control signals, transforming a single-purpose system into a multi-functional platform
2Device complexity
If local power generating assets operate independently as single power sources, then device complexity is reduced, but power generation capability and revenue potential are limited
Solution Approach 1:
The system combines multiple independent power generating assets (EVSEs with vehicle batteries, fixed energy storage systems, local generation resources) into a unified virtual power plant that operates collectively, allowing each asset to maintain its simplicity while achieving enhanced overall power generation capability through aggregation and coordinated control
3Productivity
If a local energy management system integrates and manages multiple mixed power generating assets, then power and revenue generation capabilities are enhanced, but device complexity increases
Solution Approach 1:
The local energy management system acts as an intermediary layer between the diverse power generating assets and the grid operator, providing standardized interfaces for communication and control, which simplifies the integration process and manages complexity through abstraction while enabling enhanced power generation capabilities
Data Source
AI summary
Certain aspects of the present disclosure relate to a local energy management system (LEMS) at local mixed power generating sites for providing grid services and grid service applications. The LEMS generally serves as a local power control agent for facilitating energy management at the local site level by controlling and leveraging a plurality of local assets deployed at the local site, and combining a plurality of generated power from each site which acts as its own virtual power plant for delivering grid services to the grid. In addition, the LEMS has the ability to effectively handle and fulfill energy and electrical objectives of the grid services, including regulation or demand response objectives from the grid, by conveying operational set points that control the power charge and discharge at each local asset in order to meet those objectives.