DER Grid Synchronization Control for Stable Three-Phase Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electrical distribution networks face challenges in efficiently managing power distribution, particularly in connecting and stabilizing single-phase power from distributed energy resources (DERs) to three-phase electric grids, which is essential for maintaining continuity of power supply and ensuring system stability.
Innovation Solution
The implementation of an automated controller and local area supervisory controller system that monitors and regulates electrical parameters across connection points, synchronizes power supply, and controls contactors and inverters to meet predefined conditions, enabling efficient conversion and distribution of single-phase power to three-phase systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If single-phase power from DERs is connected to three-phase electric grid, then power distribution efficiency is improved, but system stability deteriorates due to phase mismatch
Solution Approach 1:
An automated controller is introduced as an intermediary device between single-phase DERs and three-phase grid connections. The controller monitors electrical parameters (voltage, frequency, phase angle) and controls contactors to establish connections only when synchronization conditions are met, thereby maintaining system stability while enabling efficient power distribution.
Solution Approach 2:
The system dynamically adjusts operational parameters including voltage levels, frequency matching, and phase angle synchronization before establishing connections. By changing these parameters to meet predefined synchronization conditions, the system resolves the contradiction between efficient power distribution and system stability.
2Reliability
If multiple electrical systems are interconnected, then power supply continuity is improved, but device complexity increases due to additional electrical components
Solution Approach 1:
Multiple electrical systems (DERs, microgrids, utility grid) are merged into a unified interconnected network managed by a centralized automated controller. This consolidation improves power supply continuity through redundant pathways while the controller minimizes the need for separate stabilization components in each individual system.
Solution Approach 2:
The automated controller serves multiple functions simultaneously: monitoring electrical parameters, controlling contactor operations, determining synchronization conditions, and managing power flow distribution. This multi-functionality reduces overall device complexity by replacing multiple specialized components with a single universal control system.
3Stability of the object's composition
If automated control system is implemented, then power distribution stability is improved, but ease of operation deteriorates due to monitoring requirements
Solution Approach 1:
The automated control system operates autonomously by self-monitoring electrical parameters and self-adjusting contactor operations based on real-time system conditions. The system serves itself by automatically determining when synchronization conditions are met and executing connections without external intervention, thereby maintaining stability while simplifying operation.
Solution Approach 2:
The controller continuously monitors electrical parameters (voltage, frequency, phase angle) and uses this feedback to automatically adjust system operations. This closed-loop feedback mechanism maintains power distribution stability while eliminating the need for manual monitoring and adjustment, improving ease of operation.
Data Source
AI summary
Various embodiments provide methods and systems for monitoring and controlling electrical components of an electrical distribution network. In an embodiment, a method, performed by an automated controller, includes receiving values corresponding to electrical parameter(s) associated with multiple connection points in the electrical distribution network, the values being acquired via electrical sensor(s). The method also includes transmitting the values to a local area supervisory controller, upon receiving a measurements-related request. The method further includes receiving a control message from the local area supervisory controller, the control message including predefined conditions and information indicating the automated controller to wait for the predefined conditions to be met between two connection points having a connection point to which a distributed energy resource (DER) is connected. The method further includes controlling an operation of contactor(s) positioned between the two connection points based at least on the predefined conditions.