Power Conversion System Voltage Current Control
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Solution Overview
Problem
Existing power conversion systems require circuit breakers to stabilize power supply, leading to increased costs and reduced reliability.
Innovation Solution
A power conversion system with a first power conversion device connected between a power supply and a load, and one or more second power conversion devices in parallel, where the first device controls output voltage and the second devices control output current based on detected voltage values to stabilize power supply without circuit breakers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a circuit breaker is used to disconnect the power path, then power supply stability to the load is improved, but system cost increases and reliability degrades
Solution Approach 1:
The invention extracts and eliminates the circuit breaker component from the power conversion system. By using control signals to disconnect the second power conversion device instead of a physical circuit breaker, the system achieves power supply stability without the added cost and reliability issues associated with circuit breakers.
Solution Approach 2:
The invention replaces the mechanical/electrical circuit breaker with an electronic control mechanism. The controller uses control signals to disconnect the second power conversion device, substituting a mechanical disconnection system with an electronic control system that achieves the same protective function without the drawbacks of circuit breakers.
Data Source
AI summary
A power conversion system includes one power conversion device and one or more power conversion devices. The power conversion device includes a power converter that controls output voltage to be a preset voltage to apply the preset voltage to a load on the basis of an output from a power supply. The power conversion device controls the power converter so that a detected value of the first voltage detected by a voltage detector becomes a preset voltage value. The power conversion devices each include a power converter that controls output current to be a preset current to supply the preset current to the load on the basis of an output from a power supply. The power conversion devices each controls operation of the power converter on the basis of the detected value of the first voltage. The power conversion device controls operation of the power converter by changing the first voltage.