Generator Controller Voltage Stabilization via Reactive Power
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Solution Overview
Problem
Existing methods for operating electric energy generating machines, such as wind turbines and solar photovoltaic systems, fail to efficiently manage high voltage conditions at a point of common coupling, leading to instability in the power grid and requiring complex analysis for reactive power adjustment.
Innovation Solution
A method that senses high voltage levels, curtails active power output to increase reactive current capability, establishes a set point for reactive power, and controls electric energy generating machines to remedy high voltage conditions by increasing reactive current and apparent power, allowing them to remain operational and support grid stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If active power output is maintained at high levels during high voltage conditions, then energy production is maximized, but voltage stability deteriorates and grid damage risk increases
Solution Approach 1:
The controller dynamically changes operating parameters by curtailmentg active power output and adjusting reactive power output when high voltage conditions are detected. This parameter adjustment allows the generating machines to transition from maximum energy production mode to voltage stabilization mode, resolving the contradiction between productivity and reliability
Solution Approach 2:
The system implements dynamic control where the controller continuously monitors voltage levels and adjusts active and reactive power output accordingly. During normal conditions, full active power is produced; during high voltage conditions, active power is curtailed and reactive power is increased to stabilize voltage, enabling the system to adapt to changing grid conditions
2Reliability
If reactive capability is increased to remedy high voltage conditions, then voltage stability is improved, but active power production is reduced
Solution Approach 1:
The controller changes the power output parameters by reducing active power and increasing reactive power when high voltage conditions occur. This parameter transformation allows the system to prioritize voltage stability over energy production during adverse conditions, while automatically returning to full production when conditions normalize
Solution Approach 2:
The system converts the harmful high voltage condition into a beneficial opportunity by using reactive power capability to stabilize the grid. The curtailmentg of active power temporarily reduces production, but this enables the generating machines to provide valuable voltage support services that benefit the overall grid stability
3Measurement precision
If complex analysis is performed to establish predeterminable values for voltage control, then control precision is improved, but system complexity increases
Solution Approach 1:
The controller performs self-adjustment by automatically detecting high voltage conditions and autonomously adjusting active and reactive power output without requiring external control signals or complex pre-configured parameters. This self-service capability simplifies the control system while maintaining precise voltage control through real-time feedback
Data Source
AI summary
A method and a controller for continuously operating a plurality of electric energy generating machines during a high voltage condition at a point of common coupling of the plurality of electric energy generating machines are provided herein. The method includes a) sensing a voltage level at the point of common coupling exceeding a permitted voltage level; b) curtailing an active power output of the plurality of electric energy generating machines such that a reactive capability of the plurality of electric energy generating machines is increased; c) establishing a set point of an electric quantity being present at the point of common coupling such that a reactive electric component providable by the electric energy generating machines is increased; and d) controlling an electric energy generating machine based on the set point of the electric quantity such that the high voltage condition at common coupling is at least partially remedied.