Input Power Control Module for Distributed Energy Integration
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Solution Overview
Problem
The challenge lies in efficiently coupling and managing a variety of small, distributed power sources with different voltage, frequency, and capacity outputs, which is complicated by the lack of uniformity and the need for expensive and complex interconnection equipment, especially in scenarios like natural disasters where quick power restoration is crucial.
Innovation Solution
The development of an Input Power Control (IPC) module that includes a DC bus and converter modules to convert power from diverse sources into a standardized AC output, allowing for flexible and rapid connection of multiple power sources to an AC system, with features like isolation and load balancing to ensure reliability and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If distributed power sources with different voltage, frequency, and capacity outputs are coupled to an AC system, then power flexibility and distribution capability are improved, but interconnection equipment complexity and cost increase
Solution Approach 1:
The patent introduces an intermediary conversion system comprising rectifier modules and inverter modules that mediate between distributed power sources of varying characteristics and the AC system. The rectifier modules convert AC to DC, and the inverter modules convert DC back to AC at standardized voltages and frequencies, thereby harmonizing diverse power sources without requiring complex custom interconnection equipment for each source type.
Solution Approach 2:
The patent applies parameter changes by converting power from various voltage and frequency parameters to standardized parameters through the rectifier-inverter architecture. Distributed sources operating at different voltages (e.g., 120V, 240V, 480V) and frequencies (50Hz, 60Hz) are converted to a common DC intermediate voltage, then inverted to standardized AC output parameters, thereby simplifying interconnection while maintaining adaptability.
2Loss of time
If distributed power sources are quickly connected during emergencies, then power restoration speed is improved, but connection reliability and system stability may worsen
Solution Approach 1:
The patent implements preliminary action by pre-configuring standardized connection interfaces and pre-charging circuits that prepare the system for rapid connection. The control system pre-establishes connection parameters and performs preliminary synchronization checks, enabling quick connection during emergencies while maintaining reliability through pre-planned connection procedures and standardized protocols.
Solution Approach 2:
The patent employs feedback mechanisms through control circuits that continuously monitor connection status, voltage levels, and system stability. Upon connection of distributed power sources, the control system receives feedback signals and dynamically adjusts operating parameters to maintain stability, thereby ensuring both rapid connection capability and sustained connection reliability through real-time monitoring and adjustment.
3Quantity of substance
If multiple distributed power sources are electrically connected at a common location, then transmission line costs are reduced, but voltage fluctuations and faults in one source affect other sources
Solution Approach 1:
The patent applies segmentation by electrically isolating each distributed power source through individual rectifier-inverter modules connected to a common DC bus. This modular architecture segments the electrical connections, allowing each source to operate independently while sharing common infrastructure (DC bus and inverter stage), thereby reducing transmission line costs while preventing voltage fluctuations and faults from propagating between sources.
Solution Approach 2:
The common DC bus serves as an intermediary that decouples AC-side variations from one another. By converting all AC inputs to DC before re-converting to AC output, the DC bus mediates between diverse AC sources, isolating them from each other while enabling cost-effective shared infrastructure for power transmission and distribution.
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
Enables the efficient and reliable transfer of power from multiple sources to an AC system, improving flexibility and reducing installation costs, while maintaining system stability and reliability, especially in emergency situations.
Implementation Method 1
converter modules to convert power from diverse sources into a standardized AC output
Implementation Method 2
converter modules to convert power from diverse sources into a standardized AC output
Data Source
AI summary
A system and method for controlling power flow between power sources and a load in a power system are disclosed. Briefly described, one embodiment is a method for transferring power from a plurality of power sources to an AC system through an IPC module. The IPC module receives a first amount of power from a first power source that is external to the IPC module, receives a second amount of power from a second power source that is external to the IPC module, controls at least a first amount of direct current (DC) power through a first primary converter module coupled to a DC bus, receives a second amount of DC power from a second primary converter module coupled to the DC bus, converts the first and the second amounts of DC power into AC power, and transfers the AC power to the AC power system.