Power Control Apparatus Dummy Current Threshold Detection
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Solution Overview
Problem
There is a need for a power control system that can efficiently manage and operate multiple distributed power sources such as solar cells, storage cells, fuel cells, and gas power generators without compromising their versatility.
Innovation Solution
A control method for a power control system that includes a power generation apparatus, a power control apparatus, and a dummy current output unit, where the power control apparatus increases dummy current stepwise and stores the minimum forward power flow as a threshold when the output voltage rises, allowing efficient operation of distributed power sources during both interconnected and independent operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a power control system manages multiple distributed power sources integrally, then operational efficiency is improved, but system complexity increases
Solution Approach 1:
The patent introduces a power control apparatus as an intermediary device that manages multiple distributed power sources (solar panels, storage cells, fuel cells, gas power generators). This central controller coordinates power generation, storage, and distribution, enabling efficient integrated operation without requiring complex modifications to each individual power source, thus improving operational efficiency while controlling system complexity.
2Measurement precision
If dummy current is increased stepwise to detect forward power flow threshold, then measurement precision is improved, but time consumption increases
Solution Approach 1:
The patent employs periodic action by increasing dummy current stepwise at predetermined intervals until forward power flow is detected. This methodical, periodic adjustment allows precise threshold detection while minimizing unnecessary time consumption. The system waits for predetermined times between steps, enabling accurate measurement without continuous adjustment, thus balancing precision with time efficiency.
Data Source
AI summary
This power control system (100) includes a power generation apparatus (33) that generates, while a current sensor (40) detects forward power flow equal to or greater than a threshold, power corresponding to a value detected by the current sensor, and a power control apparatus (20) that controls distributed power sources. The power control apparatus is connected to a dummy current output unit capable of supplying the current sensor with dummy current. The control method includes, in a state of constant current flowing to a load from the power generation apparatus and the power control apparatus for a predetermined time, a first step of the power control apparatus increasing the dummy current from the dummy current output unit stepwise, and after the first step, a second step of storing, as the threshold, a minimum of the forward power flow when output voltage of the power generation apparatus rises.