Optimized Design of Stationary Frame Three Phase AC Current Regulators
By D. G. Holmes, Thomas A. Lipo, Brendan McGrath, W. V. Kong. IEEE transactions on power electronics, 2009
745 citations recorded by the source corpus.
Current regulation plays an important role in modern power electronic AC conversion systems. The most direct strategy to regulate such currents is to use a simple closed loop proportional-integral (PI) regulator, which has no theoretical stability limits as the proportional and integral gains are increased, since it is only a second order system. However, pulsewidth modulation (PWM) transport and controller sampling delays limit the gain values that can be achieved in practical systems. Taking these limitations into account, this paper presents an analytical method to determine the best possible gains that can be achieved for any class of practical linear AC current controller. The analysis shows that the maximum possible proportional gain is determined by the plant series inductance, the DC bus voltage and the transport and sampling delays, while the maximum possible integral gain is determined primarily by the transport and sampling delays. The work is applicable to stationary frame PI regulators, stationary frame controllers with back electromotive force compensation, stationary frame P+ resonant (PR) controllers, and synchronous d- q frame controllers, since they all have identical proportional and integral gains that must be optimized for any particular application.
Subfields: Control and Systems Engineering, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/9f307307279b1d6669832fa25e0a2bd8c4c77075
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Citations in the corpus
- Passivity-Based Stability Assessment of Grid-Connected VSCs—An Overview (2016, neutral): “Selecting αh αc is recommended [37].”
- Step-by-Step Controller Design for LCL-Type Grid-Connected Inverter with Capacitor–Current-Feedback Active-Damping (2014, background): “Compared with PI compensator, PR compensator can provide larger gain at the fundamental frequency to eliminate the steadysate error [27], [30], [31].”
- Highly Accurate Derivatives for LCL-Filtered Grid Converter With Capacitor Voltage Active Damping (2016, methodology): “Design of its parameters Kp and Ki has also been discussed in [29], which is the same method used in this paper”
- Grid-Current-Feedback Active Damping for LCL Resonance in Grid-Connected Voltage-Source Converters (2016, methodology): “For the former, plenty of existing references are available with [24] being an example.”
- Generalized Design of High Performance Shunt Active Power Filter With Output LCL Filter (2012, methodology): “The locations of these poles, and hence the system response and performance, can be varied by applying unity feedback, and then tuning the proportional gain Kpc of the current controller.”
- Passivity-Based Stability Analysis and Damping Injection for Multiparalleled VSCs with LCL Filters (2017, background): “Experimental tests with three paralleled, LCL-filtered VSCs are carried out.”
- Artificial Intelligence Aided Automated Design for Reliability of Power Electronic Systems (2019, background): “Similarly, higher v dc increases the switching losses and causes higher switching ripple [22], but the higher it is, the more control bandwidth it provides [25].”