Adaptive Control of a Virtual Synchronous Generator with Multiparameter Coordination
Abstract
:1. Introduction
2. Topology and Mathematical Model of VSG
2.1. Topology of VSG
2.2. Mathematical Model of VSG
3. Multiparameter Cooperative Adaptive Control of VSG
3.1. The Influence of VSG Parameters on the System
3.2. Cooperative Adaptive Selection Strategy of Control Parameters
- When Δω and dω/dt change in the same direction, J needs to be increased;
- When Δω and dω/dt change in opposite directions, J should be kept unchanged.
3.3. The Setting of Parameter Value Range
4. Simulation Analysis
4.1. Effect of Changes in System Parameters on System Frequency
4.2. Simulation under Varying System Loads
4.2.1. Simulation Comparison of Different Control Strategies
4.2.2. Comparison of Parameter Changes
4.3. Simulation under Grid Frequency Variation
4.3.1. System Frequency Performance
4.3.2. Variation of the Three Parameters
5. Conclusions
- (1)
- Analyze the effect of droop factor, virtual inertia, and damping factor on the VSG system and determine the range of values for the system parameters.
- (2)
- The existing J and D coordinated adaptive control is optimized. The droop coefficient and virtual inertia can be adjusted in real time according to the system frequency state, and the damping coefficient can be changed cooperatively according to the corresponding relationship. The three are always coordinated and adjusted during the change process, which effectively improves the dynamic performance of the system frequency. The effectiveness and reliability of the proposed multiparameter cooperative adaptive control strategy have been verified by simulation.
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Parameter | Numerical Value | Parameter | Numerical Value |
---|---|---|---|
Rated voltage on AC grid ug (V) | 380 | Filter inductor Labc(mH) | 0.8 |
Rated voltage on DC side Udc (V) | 800 | Filter capacitor Cabc (uF) | 10 |
Rated active power (W) | 50,000 | Initial value of virtual inertia J0 (kg·m2) | 1.127 |
Rated reactive power (Var) | 0 | Initial value of droop coefficient KP0 | 5000 |
Control Strategy | Nadir (Hz) | Deviation (Hz) | Adjustment Time (s) | ROCOF |
---|---|---|---|---|
Fixed parameters | 49.83 | 0.17 | 0.3 | maximum |
J, D adaptive control | 49.867 | 0.133 | 0.22 | medium |
Parametric coordinated fuzzy adaptive control strategy | 49.868 | 0.132 | 0.22 | medium |
Multiparameter cooperative adaptive control | 49.877 | 0.123 | 0.22 | minimum |
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Ren, B.; Li, Q.; Fan, Z.; Sun, Y. Adaptive Control of a Virtual Synchronous Generator with Multiparameter Coordination. Energies 2023, 16, 4789. https://doi.org/10.3390/en16124789
Ren B, Li Q, Fan Z, Sun Y. Adaptive Control of a Virtual Synchronous Generator with Multiparameter Coordination. Energies. 2023; 16(12):4789. https://doi.org/10.3390/en16124789
Chicago/Turabian StyleRen, Bixing, Qiang Li, Zhiyuan Fan, and Yichao Sun. 2023. "Adaptive Control of a Virtual Synchronous Generator with Multiparameter Coordination" Energies 16, no. 12: 4789. https://doi.org/10.3390/en16124789