Multi-Winding Generator Observer Synchronization for Rotor Position Control
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Solution Overview
Problem
Controlling multiple winding set electrical synchronous machines is complex and often results in undesired transient torques due to erroneous rotor position determination, impairing generator performance and reliability.
Innovation Solution
A method and controller using a first position observer, such as an EMF or HFI observer, to determine the rotor position for a first winding set, with subsequent observers for other sets, reducing equipment complexity and transient torques by employing an external initial value from an optical or mechanical sensor, and enabling slave observers after synchronization of the master observer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional voltage sensored determination methodology is used for multiple winding set generators, then rotor position can be determined, but equipment complexity increases and transient torques are generated
Solution Approach 1:
The patent divides the control system into a master winding set and slave winding sets. The master winding set uses voltage sensors for position determination, while slave winding sets use the master's position information without requiring separate voltage sensors, thereby reducing overall equipment complexity while maintaining position determination accuracy.
Solution Approach 2:
The master winding set's position observer serves multiple functions: it determines the rotor position for the master winding set and simultaneously provides the initial position information for synchronizing slave winding sets. This multi-functionality eliminates the need for separate position determination equipment for each winding set.
2Measurement precision
If conventional voltage sensored determination methodology is used for multiple winding set generators, then rotor position can be determined, but undesired transient torques are generated
Solution Approach 1:
The patent applies preliminary synchronization action by using the master winding set's observed position as the initial position for slave winding sets before they begin independent operation. This preliminary action ensures that all winding sets start from a synchronized state, preventing transient torques that would otherwise occur due to position mismatches.
Solution Approach 2:
The system uses feedback from the master position observer to initialize and synchronize the slave position observers. This feedback mechanism ensures that all winding sets maintain consistent position information, eliminating the position determination errors that cause transient torques in conventional systems.
3Adaptability or versatility
If separate position observers are used for each winding set, then each winding set can be controlled independently, but complexity and time consumption increase
Solution Approach 1:
The patent segments the position determination function into a master observer that serves all winding sets and individual slave observers for each winding set. This segmentation maintains independent control capability for each winding set while reducing overall system complexity by sharing the master observer's position determination results.
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
Reduces equipment complexity and transient torques, improving generator performance and reliability by ensuring accurate rotor position determination and synchronized control across multiple winding sets.
Implementation Method 1
using a first position observer; in particular EMF or HFI observer, configured to observe the first winding set in order to observe a first value of the rotor position
Data Source
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AI summary
It is described a method of operating an, in particular multiple winding set, electrical synchronous machine (2), in particular during synchronization of a position observer, comprising a rotor (3) and a stator (4) having a first winding set (5) and in particular at least one second winding set (6), the method comprising: using a first position observer (12_1) configured to observe the first winding set (5) in order to observe a first value (13_1) of the rotor position, in particular based on an external initial value of the rotor position; synchronizing the machine (2) based on the first observed value (13 1) or an external initial value of the rotor position.