Generator Brake Release Control Using Voltage-Based Wind Estimation
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Solution Overview
Problem
The existing power generation systems face challenges in efficiently stopping the electric brake operation to prevent a decrease in power generation efficiency while avoiding increased costs, particularly due to the need for anemometers or multiple temperature sensors.
Innovation Solution
A control device is implemented in the power generation system that uses a voltage sensor to determine the rotation speed of the rotating body and estimate the wind speed, allowing for the timely release of the electric brake without the need for additional sensors like anemometers or temperature sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the electric brake operation is stopped based on a predetermined period elapsing, then the control system remains simple, but power generation efficiency decreases when the predetermined period is too long
Solution Approach 1:
The patent implements feedback control by continuously monitoring the rotation speed of the rotating body and using this information to dynamically adjust the brake operation state. The control device determines whether to maintain or release the brake based on real-time rotation speed measurements, creating a closed-loop control system that optimizes power generation efficiency while maintaining simple system architecture.
2Productivity
If an anemometer is used to determine the timing to stop the electric brake operation, then power generation efficiency is maintained, but cost increases
Solution Approach 1:
The patent makes the rotation speed sensor serve multiple functions: it is used both for normal power generation control and for determining the timing to release the electric brake. By reusing the existing sensor infrastructure for dual purposes, the system achieves accurate wind speed estimation and optimal brake release timing without requiring additional specialized sensors like anemometers, thereby maintaining power generation efficiency while avoiding increased costs.
3Productivity
If multiple temperature sensors are used to detect temperatures of heat sources, then the electric brake operation timing is optimized, but cost increases
Solution Approach 1:
The patent employs the rotation speed sensor to perform multiple measurement functions, including monitoring rotation speed for power generation control and estimating wind speed for brake operation timing. This multi-functional use of existing sensors eliminates the need for additional temperature sensors or other specialized measurement devices, achieving optimized electric brake operation while controlling system cost.
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 solution enables the electric brake to be released at the optimal time, maintaining power generation efficiency without increasing costs, as it utilizes existing voltage sensors for wind speed estimation.
Implementation Method 1
a generator (3), connected to the rotating body (1), which is rotated by a rotating force generated by wind or the like to generate three-phase AC power
Implementation Method 2
a brake circuit (4), connected to the generator (3), which generates a braking force on the rotating body (1) by short-circuiting the phases
Data Source
AI summary
A power generation system includes a rotating body, a generator, a brake circuit, a voltage sensor, and a control device. When rotation speed of the rotating body exceeds a first threshold, the control device executes a brake operation by the brake circuit. When a release condition determined based on at least one of a value of a generated voltage detected by the voltage sensor and the rotation speed of the rotating body is satisfied after the rotation speed of the rotating body is lower than the first threshold, the control device stops the brake operation by the brake circuit.