Energy Router Control for Three-Phase Load Balancing
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Solution Overview
Problem
Existing technologies face challenges in addressing three-phase imbalance in power grids due to high load randomness and uneven distribution of single-phase loads, particularly in photovoltaic energy systems, leading to reduced reliability and safety hazards.
Innovation Solution
A three-phase power control method and apparatus using energy routers to monitor and distribute power dynamically, ensuring equal power distribution among phases by adjusting consumption and generation power through energy routers at the grid, storage, and photovoltaic device sides, achieving three-phase dynamic balancing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If single-phase loads are connected to the power grid, then power consumption is provided to loads, but three-phase imbalance occurs leading to reduced reliability and safety hazards
Solution Approach 1:
The invention segments the single-phase load control into three separate phase-controlled circuits, each with independent control switches. This segmentation allows independent adjustment of each phase's power consumption to achieve balance, resolving the contradiction between providing power to loads and maintaining system reliability through balanced three-phase operation.
Solution Approach 2:
The invention implements dynamic control of power consumption by using adjustable control switches (such as triacs or solid-state relays) that can dynamically adjust the power distribution to each phase based on real-time imbalance detection. This dynamic adjustment capability enables the system to maintain reliability while flexibly meeting load power requirements.
2Reliability
If load compensation devices are used to address three-phase imbalance, then power quality is improved, but system complexity and cost increase
Solution Approach 1:
The invention implements a self-service approach where the system automatically detects three-phase imbalance and adjusts power consumption distribution without requiring external compensation devices. The control unit continuously monitors phase currents and automatically adjusts the control switches to balance the phases, eliminating the need for complex external compensation equipment while maintaining power quality.
Solution Approach 2:
The invention employs feedback control by continuously monitoring the current drawn by each phase and using this information to adjust the power distribution. The control unit receives feedback from current sensors and dynamically adjusts the control switches to maintain balanced phases, achieving power quality improvement through a simple feedback loop rather than complex compensation devices.
3Productivity
If uneven distribution of single-phase loads occurs, then power is delivered to various loads, but transformer losses increase and maintenance risks rise
Solution Approach 1:
The invention uses dynamic adjustment of power distribution to each phase through controllable switches, allowing the system to continuously optimize the balance between phases while meeting the total power delivery requirements. This dynamic balancing minimizes transformer losses by ensuring uniform current distribution across all three phases, thereby maintaining productivity while reducing energy waste.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces transformer losses, maintains power quality, minimizes maintenance risks, and enhances system stability by eliminating the need for costly load compensation devices, ensuring safe and reliable operation.
Implementation Method 1
a photovoltaic device PV, and an energy storage device ST... photovoltaic generation power
Data Source
AI summary
This disclosure relates to a photovoltaic energy storage and power system and a three-phase power control method, apparatus and device for load(s). The three-phase power control method for load(s) in a photovoltaic energy storage and power system includes obtaining a drawing or feeding power of a grid, an charging or discharging power of energy storage, and a photovoltaic generation power; determining a generation power of an electric power system based on the drawing or feeding power of the grid, the charging or discharging power of the energy storage, and the photovoltaic generation power; and distributing the generation power of the electric power system evenly to load(s) of each phase to achieve three-phase dynamic balancing.