Neutral Regulation of Renewable Energy for Grid Voltage Limits
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Solution Overview
Problem
Existing electric vehicle (EV) charging systems and renewable energy sources (RES) face challenges in efficiently modulating charging rates and energy generation to avoid overburdening the power system, particularly due to variable output from RES and the need to adhere to voltage limits and capacity constraints.
Innovation Solution
A computer-implemented method and system for adaptive charging modulation between EV charging poles and the power system, and for renewable energy source power modulation, using control units with processors to receive monitoring and controlling data, adjust charge levels, and determine phase activation or deactivation based on real-time system conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If EV charging rate is increased to meet growing charging demand, then charging productivity is improved, but burden on the power system increases causing voltage instability
Solution Approach 1:
The charging rate is made dynamic rather than fixed, allowing real-time adjustment based on grid conditions. The system continuously monitors voltage levels and automatically modulates charging rates to maintain stability while maximizing energy transfer when conditions permit.
Solution Approach 2:
A feedback mechanism is implemented where voltage measurements from the power system are continuously fed back to the charging control unit. This feedback loop enables the system to detect voltage deviations and adjust charging parameters accordingly, preventing both overcharging and voltage instability.
2Power
If RES maximum capacity is increased to meet energy demand, then energy generation is improved, but overvoltage protection circuit breaker is triggered
Solution Approach 1:
The system changes operational parameters of the RES dynamically. Instead of operating at fixed maximum capacity, the RES output is continuously adjusted based on real-time voltage measurements and grid conditions, allowing full utilization of generation capacity without triggering overvoltage protection.
Solution Approach 2:
The RES operates in a dynamic mode where generation capacity is flexibly adjusted. The system monitors voltage levels and automatically modulates RES output to maintain voltage within acceptable limits while maximizing energy production during favorable conditions.
3Productivity
If RES efficiency is improved to generate more energy, then energy output is increased, but nameplate capacity exceeds original allowed energy injection capacity
Solution Approach 1:
A feedback control system monitors the actual energy injection into the grid and compares it against the original allowed capacity. When high-efficiency RES generates more energy than originally permitted, the feedback mechanism triggers automatic modulation to reduce output and maintain compliance with grid capacity limits.
4Reliability
If charging modulation is implemented to reduce power system burden, then power system reliability is improved, but charging time increases
Solution Approach 1:
The charging process is divided into periodic intervals with alternating modulation levels. During periods of low grid stress, charging operates at high rates to minimize time. During periods of high stress, charging is modulated to maintain stability. This periodic alternation balances speed and reliability requirements.
Data Source
AI summary
A computer-implemented method for performing a distributed energy generation (DEG) modulation between one or more renewable energy sources (RES's) and dispatchable loads, and a local power system and a global power system using a RES power management system, wherein the RES power management system comprises one or more onsite control loops. The DEG modulation runs only when a run-time measured grid boundary condition of voltage, current, or power exceeds the allowed voltage, current, or power capacity plus a safety margin of any phase of the three-phase AC electricity distribution network of the local power system or the global power system. The RES power management system receives dynamic global power system grid services in advance and store the system requirements locally; thus, the DEG modulation can be executed even under total loss of wired and wireless data communication.