TY - JOUR
T1 - Design of reactive power regulator of synchronous generators by considering grid impedance angle for characteristic index objectives
AU - Raboni, Pietro
AU - Chaudhary, Sanjay K.
AU - Chen, Zhe
PY - 2016/10
Y1 - 2016/10
N2 - Effects of low reactance to resistance ratio in distribution networks are widely studied but little work dealing with the tuning of voltage and reactive power regulators of small synchronous generators has been reported. This study endeavours the design of a proportional integral controller for the reactive power regulator to fulfil the characteristic index (CI) objectives, which are based on the step-response characteristics. Two small-signal models of the reactive power regulator have been developed from the well-known k-parameter model and they are validated. Apart from offline tuning of the regulator, these models can be used to assess system robustness and stability. In addition to the analytical approach, the same regulator is tuned optimally by means of multiple simulations. Proposed objective functions rely on the CIs tracked during the sequence of runs, whereas the traditional cost functions are formulated on the basis of the integral of an error. This difference makes them suitable for the cases where the entire step-response data series are unavailable. The performances of differently tuned regulators are compared considering a test system including a 100 kW Diesel Generator Set equipped with a brushless exciter.
AB - Effects of low reactance to resistance ratio in distribution networks are widely studied but little work dealing with the tuning of voltage and reactive power regulators of small synchronous generators has been reported. This study endeavours the design of a proportional integral controller for the reactive power regulator to fulfil the characteristic index (CI) objectives, which are based on the step-response characteristics. Two small-signal models of the reactive power regulator have been developed from the well-known k-parameter model and they are validated. Apart from offline tuning of the regulator, these models can be used to assess system robustness and stability. In addition to the analytical approach, the same regulator is tuned optimally by means of multiple simulations. Proposed objective functions rely on the CIs tracked during the sequence of runs, whereas the traditional cost functions are formulated on the basis of the integral of an error. This difference makes them suitable for the cases where the entire step-response data series are unavailable. The performances of differently tuned regulators are compared considering a test system including a 100 kW Diesel Generator Set equipped with a brushless exciter.
KW - Exciters
KW - Voltage Control
KW - Power distribution control
KW - Diesel-engine generators (DEGs)
KW - Reactive Power Control
KW - Synchronous generators
KW - PI control
UR - http://ieeexplore.ieee.org/document/7707505/
U2 - 10.1049/iet-gtd.2016.0154
DO - 10.1049/iet-gtd.2016.0154
M3 - Journal article
SN - 1751-8687
VL - 10
SP - 3508
EP - 3516
JO - IET Generation, Transmission & Distribution
JF - IET Generation, Transmission & Distribution
IS - 14
ER -