Dynamic Voltage Adjustment for Remote Load Stability
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Solution Overview
Problem
Conventional power transmission systems fail to maintain a stable voltage difference across remote loads due to transmission line resistances, leading to potential damage from voltage drops during power transmission.
Innovation Solution
A dynamic voltage adjustment device that samples forward and reverse transmission voltage drops and adjusts the reference voltage of the power converter to compensate for these drops, ensuring a stable voltage difference across the load by incorporating a feedback circuit and an adder circuit to generate a dynamic reference voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If electricity is transmitted through a transmission line with resistance to a remote load, then power can be delivered to the load, but voltage drops occur across the transmission line causing unstable or damaged load operation
Solution Approach 1:
The patent implements a feedback mechanism where the actual load voltage is sampled and fed back to the control circuit. The control circuit compares the sampled voltage with a reference voltage and adjusts the power converter's output accordingly to compensate for transmission line voltage drops, ensuring stable load voltage despite line resistance variations
Solution Approach 2:
The patent dynamically adjusts the output voltage parameter of the power converter based on detected transmission line conditions. By changing the output voltage parameter in response to load and line conditions, the system compensates for voltage drops and maintains stable load operation
2Ease of operation
If the feedback point samples the output voltage close to the power converter, then the feedback circuit can easily acquire voltage information, but it cannot detect the voltage drops generated by transmission line resistance
Solution Approach 1:
The patent extracts the voltage drop information by separately sampling the load voltage through a dedicated feedback network that is electrically isolated from the main output node. This separate sampling path allows the system to measure the actual voltage at the load including transmission losses, while the main feedback point remains simple and stable
3Reliability
If the power converter output voltage is adjusted to compensate for transmission voltage drops, then load voltage stability is improved, but the system becomes more complex requiring additional control circuits
Solution Approach 1:
The patent combines the feedback circuitry and control logic into an integrated solution where the voltage sampling network and control circuit work as a unified system. The feedback resistors and control circuit are designed to work together seamlessly, reducing overall system complexity while achieving stable load voltage through coordinated operation of these components
Data Source
AI summary
The present invention discloses a dynamic voltage adjustment device for dynamically adjusting an output voltage of a power transmission system which generates the output voltage according to a feedback signal and a reference signal and transmits the output voltage to a remote load via a transmission line to generate a load current. The dynamic voltage adjustment device comprises a first signal terminal, for receiving a first signal corresponding to a forward transmission voltage drop of the transmission line; a second signal terminal, for receiving a second signal corresponding to a reverse transmission voltage drop of the transmission line; a third signal terminal for receiving a reference voltage; a feedback circuit, for generating a feedback signal according to the first signal; and a adder circuit, for generating the reference signal according to the second signal and the reference voltage.