Generator Set Phase Control for Grid Frequency Stabilization
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Solution Overview
Problem
Generator sets with internal combustion engines struggle to dynamically respond to frequency dips and load surges, leading to instability in electrical supply grids, particularly with increased use of renewable energy sources.
Innovation Solution
A method and device for operating a generator set that includes phase-controlled engine operation using a virtual seismic mass model to adjust torque-forming combustion control variables, allowing the engine to react dynamically to frequency changes and stabilize the grid by simulating a higher mass inertia.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If generator sets with internal combustion engines are used to provide balancing energy for grid stabilization, then grid stability is improved, but the ability to dynamically respond to frequency dips and load surges deteriorates
Solution Approach 1:
The invention changes the operational parameters of the internal combustion engine by implementing phase-controlled combustion. The engine phase is regulated via a phase regulator to change the generator set phase, and the torque-forming combustion control variable is adapted to adjust the engine phase to a target engine phase. This allows the engine to react more dynamically to frequency changes while maintaining grid stability.
Solution Approach 2:
The invention replaces traditional mechanical inertia-based stabilization with a control-based approach. Instead of relying on the physical mass inertia of the engine to stabilize frequency, the system uses electronic phase control and combustion regulation to simulate inertia effects and provide dynamic response to grid fluctuations.
2Productivity
If the engine operates with traditional combustion control, then the system structure is simple, but the ability to rapidly adjust torque in response to load changes deteriorates
Solution Approach 1:
The invention implements a feedback control system where the phase regulator continuously monitors the generator set phase and adjusts the engine phase accordingly. The engine control unit adapts the torque-forming combustion control variable based on the phase difference between the actual and target engine phases, enabling rapid torque adjustment in response to load changes.
Solution Approach 2:
The invention makes the combustion process dynamic by allowing continuous adjustment of the engine phase and combustion control variables. The system transitions from static combustion control to dynamic phase-controlled combustion, enabling the engine to rapidly adapt to changing load conditions while maintaining synchronization with the grid.
Data Source
AI summary
A method for operating a generator set includes: providing the generator set includes an internal combustion engine and a generator connected to an engine of the internal combustion engine in a torque-transmitting manner; specifying a generator set frequency and a generator set phase of a voltage of a power produced by the generator; adapting a torque-forming combustion control variable for the engine; operating the engine in a phase controlled mode by regulating an engine phase via a phase regulator to change a generator set phase, the engine phase being in a predetermined phase relationship with the generator set phase; setting the variable for adapting the engine phase to a target engine phase; determining an engine target phase by a target phase generator upstream of the phase regulator, subject to a calculated rotational reference system that describes a rotary motion of a fictitious inertia-increasing mass with a virtual stabilization speed.