Synchronous Generator Field Current Shutdown Control
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Solution Overview
Problem
Conventional power distribution systems do not consistently operate in a safe and reliable manner, particularly in situations involving faults or malfunctions within the system or external components.
Innovation Solution
An arrangement for controlling a synchronous generator that includes a measurement system to detect malfunctions and a controller to shut down the field current, reducing the magnetic field and thereby protecting the system by interrupting the energy output in case of a malfunction, using sensors to measure quantities such as temperature, current, and voltage at the rectifier circuit and stator winding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional power distribution systems operate without rapid shutdown capability, then the system structure remains simple, but the reliability and safety deteriorate when faults occur
Solution Approach 1:
The control system is pre-configured with shutdown pathways and control circuits that can rapidly terminate field current and interrupt power output within milliseconds of fault detection. This preliminary preparation enables immediate response to faults without requiring complex real-time decision-making during emergency conditions.
Solution Approach 2:
The measurement system continuously monitors system quantities and provides feedback to the controller. When measured quantities indicate a malfunction, the controller receives this feedback and automatically initiates the shutdown sequence, creating a closed-loop control system that responds dynamically to system conditions.
2Reliability
If the system implements rapid shutdown capability through measurement and control systems, then the safety and reliability improve, but the device complexity increases
Solution Approach 1:
The shutdown function is extracted as a separate, dedicated control capability within the controller. The measurement system and control system are implemented as distinct functional blocks that can be independently configured and maintained. This modular extraction reduces overall system complexity by separating safety-critical functions from general control functions.
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
Ensures safe and reliable operation of the synchronous generator by promptly shutting down the energy output in case of malfunctions, protecting the generator and connected components from damage, while allowing for variable speed operation which reduces fuel consumption and maintenance costs.
Implementation Method 1
The electromagnet is inductively coupled to the stator winding. The synchronous generator generates an AC energy stream that has the same frequency as the frequency of the rotor rotating relative to the stator. The electric energy is generated upon rotation of the rotor, where by induction, a voltage is induced in the stator winding due to the rotation of the electromagnet of the rotor.
Implementation Method 2
An arrangement for controlling a synchronous generator that includes a measurement system to detect malfunctions and a controller to shut down the field current, reducing the magnetic field and thereby protecting the system by interrupting the energy output in case of a malfunction, using sensors to measure quantities such as temperature, current, and voltage at the rectifier circuit and stator winding.
Data Source
AI summary
An arrangement for controlling a synchronous generator having a stator comprising at least one stator winding and having a rotor with an electromagnet driven by a field current is provided. The rotor is rotatable relative to the stator. The electromagnet is inductively coupled to the at least one stator winding. The arrangement includes a measurement system configured to measure at least one quantity and a controller configured to cause shutting down the field current when the at least one quantity satisfies at least one criterion associated with at least one malfunction.