Power Generation System Phase Control via Electromagnetic Coupling
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Solution Overview
Problem
The complexity of phase control in existing photovoltaic power generation systems requires individual oscillation phase controllers for each power generation unit due to varying transmission line lengths, leading to a complicated configuration.
Innovation Solution
A power generation system with a reference power generation module and a power-collector closed circuit, where phase information is acquired and used to control the AC generation circuit, allowing for synchronized phase control across modules without the need for multiple oscillation phase controllers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If individual oscillation phase controllers are used for each power generation unit to accommodate varying transmission line lengths, then phase control accuracy is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple individual oscillation phase controllers into a single centralized oscillation phase controller that manages all power generation units. This is achieved by having each power generation unit include a phase information acquisition circuit that collects phase data from all units, and a control circuit that uses this aggregated information to coordinate phase control across the entire system, thereby reducing device complexity while maintaining phase control accuracy
Solution Approach 2:
The patent introduces a phase information acquisition circuit as an intermediary mechanism that collects phase information from all power generation units and makes it available to the control circuit. This intermediary structure enables the single oscillation phase controller to accurately manage phases across all units without requiring individual controllers at each unit, thus resolving the contradiction between control accuracy and device complexity
2Reliability
If multiple oscillation phase controllers are deployed across power generation units, then phase synchronization is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines multiple oscillation phase controllers into one centralized controller, reducing the total number of controllers from N (where N is the number of power generation units) to just one. This merging approach maintains phase synchronization across all units while significantly reducing manufacturing costs associated with purchasing, installing, and maintaining multiple controllers
Solution Approach 2:
The single oscillation phase controller is designed with multi-functional capability to manage all power generation units. The control circuit within each unit can operate in different modes: acquiring phase information locally, receiving phase information from other units, and executing phase control based on aggregated information. This universality allows one controller to perform the functions previously requiring multiple dedicated controllers
3Adaptability or versatility
If transmission line lengths vary between power generation units, then system flexibility is improved, but phase control complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where phase information from all power generation units is continuously collected and used to adjust phase control. The phase information acquisition circuit gathers phase data from units with varying transmission line lengths, and the control circuit uses this feedback information to calculate and apply appropriate phase adjustments, thereby managing phase control complexity while maintaining system flexibility
Solution Approach 2:
The patent dynamically adjusts phase control parameters based on the varying transmission line lengths. By monitoring the actual phase information from each unit and modifying control parameters accordingly, the system adapts to different transmission line configurations without requiring complex individual controllers for each unit, thus managing complexity while preserving flexibility
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 configuration simplifies phase control by using a reference AC current to synchronize the phase of each power generation module, reducing the complexity and cost associated with multiple phase controllers.
Implementation Method 1
a first module-side inductance element configured to generate a magnetic field from the first AC current
Implementation Method 2
a first capacitance element configured to cause resonance together with the first module-side inductance element
Data Source
Figure 1
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AI summary
A power generation system according to the present disclosure includes : a power generation module including: a power generation element; an AC generation circuit configured to convert DC current output from the power generation element into AC current; a module-side inductance element configured to generate a magnetic field from the AC current; a phase information acquiring circuit; and a control circuit; and a power-collector closed circuit including a power collector-side inductance element configured to electromagnetically couple to the module-side inductance element to generate an induced electromotive force, wherein, when reference AC current flowing in the power-collector closed circuit flows through the power collector-side inductance element, the module-side inductance element electromagnetically coupled to the power collector-side inductance element generates AC current corresponding to the reference AC current, and the control circuit acquires phase information related to the reference AC current via the phase information acquiring circuit so that the control circuit controls the AC generation circuit in accordance with the phase information.