DC Supply Circuitry for PV Inverter Input Emulation
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Solution Overview
Problem
Conventional solar battery systems often have unused DC PV inputs due to incompatibility with standard AC to DC converters, leading to unutilized potential power sources, as existing DC PV inputs are incompatible with AC to DC converters due to regulation systems that cause fault or protective states.
Innovation Solution
Implementing DC supply circuitry that converts AC power to DC power using AC to DC converter circuitry, which adjusts current and voltage based on load changes to match a predetermined current-voltage characteristic curve compatible with PV ESS inverter systems, allowing the use of AC power to supply DC PV inputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard AC to DC converters are used to supply DC PV inputs, then the converters operate with standard regulation systems, but the DC PV inputs enter fault or protective states due to incompatibility
Solution Approach 1:
The patent modifies the operating parameters of the AC to DC converter by implementing a control system that adjusts the converter's output characteristics to match the specific requirements of DC PV inputs. This involves changing voltage, current, and regulation parameters to eliminate fault conditions and enable compatibility between standard converters and DC PV input interfaces.
Solution Approach 2:
The patent introduces an intermediary control system between the AC power source and the DC PV input that mediates the interaction. This control system translates the requirements of the DC PV input into appropriate AC to DC converter operating parameters, enabling indirect compatibility without modifying the fundamental architecture of standard converters.
2Productivity
If DC PV inputs are left unused due to incompatibility, then system complexity is reduced, but potential power sources remain unutilized
Solution Approach 1:
The patent enables DC PV inputs to serve multiple functions by making them compatible with both traditional DC PV panel connections and AC power sources through the control system. This multi-functionality allows the same input interface to accept different power sources, increasing productivity without requiring separate dedicated inputs for each power type.
Solution Approach 2:
The patent implements dynamic control that allows the system to adapt its configuration based on available power sources. The control system dynamically adjusts converter parameters and routing to utilize DC PV inputs whether powered by traditional PV panels or AC sources, maximizing power generation utilization while managing complexity through intelligent adaptation rather than fixed configuration.
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 utilization of unused DC PV inputs by providing efficient DC power to the PV system for battery charging and load delivery, ensuring compatibility and efficient operation with PV ESS inverter systems.
Implementation Method 1
DC supply circuitry (206) that converts the AC voltage to a DC voltage using AC to DC converter circuitry (306)
Data Source
AI summary
DC supply circuitry is disclosed to supply DC power from an AC source to a DC PV panel input associated with a PV energy storage system (ESS) inverter system. The DC power may be supplied in accordance with a DC current and DC voltage. The DC PV panel input may function by adjusting the drawn current that is supplied by the DC supply circuitry based upon changes in the load, e.g. battery charging. The DC supply circuitry may function to adjust the supplied DC voltage in accordance with changes in the drawn current using a corresponding point on a predetermined DC voltage current-voltage characteristic (I-V) curve. The predetermined I-V curve may represent an ideal I-V curve associated with a DC PV panel system that is compatible with the PV ESS inverter system, thereby allowing for the use of DC PV panel inputs that may typically go unused.