An assessment of the proportional-integral control tuning rules applied to Photovoltaic Irrigation Systems based on Standard Frequency Converters

Design, implementation and evaluation of a control system to optimize the performance of a Permanent Magnet Synchronous Motor (PMSM) supplied by a stand-alone Photovoltaic System without batteries

“…In [16] it is obtained that this tuning method provides the maximum acceptable value for K P and the minimum acceptable value for T i to control this type of non-linear systems. In addition, it was proposed to improve the response by performing a fine adjustment, which consists mainly of increasing T i , although it may also be necessary to decrease the K P .…”

“…The key of a good system operation is the proper tuning of the PI controller, which consists of obtaining the optimal values of tuning parameters: proportional gain and integral time. Although there are many methods, both analytical and empirical, to achieve the tuning, in this paper the AMIGO (Approximate M-constrained Integral Gained Optimization) tuning rules based on frequency response modelling [20]- [21] has been applied, since they have been recently assessed as the most suitable for this kind of systems [16]. After the control parameters have been configured following these tuning rules, a fine adjustment has been made by testing the start-up process.…”

“…These kind of PVPS work executing a proportional integral-derivative (PID) control algorithm, whose control variable is the PV generator voltage and whose output variable is the motor rotation frequency. The System performance depends essentially on the proper adjustment of the PID control parameters, process known as tuning [16]. Nowadays, the fast development of electric vehicles (EVs) has contributed to a great improvement in electric motors features, mainly the permanent magnet synchronous motor (PMSM) [17], also known as brushless DC motors (BLDC).…”

Technical evaluation of a stand-alone photovoltaic heat pump system without batteries for cooling applications

“…Figure 3 shows the schematic of the PID control used for this test: a DC voltage set point value is compared to the DC voltage measured at the output of the PV generator, and the FC acts on the frequency of the compressor accordingly. Generally, PID controls for this type of system are reverse acting (for reducing the DC voltage, the frequency of the compressor is increased, and vice versa) and without a derivative component due to the high noise of the signals [19]. The DC voltage at the MPP (V MPP ) at the given 𝑇 𝐶 and G (measured with two reference PV modules) is calculated in accordance with Eq.…”

Photovoltaic heat-pumps for cooling applications

“…shows the schematic of the PID control used for this test: a DC voltage set point value is compared to the DC voltage measured at the output of the PV generator, and the FC acts on the frequency of the compressor accordingly. Generally, PID controls for this type of system are reverse acting (for reducing the DC voltage, the frequency of the compressor is increased, and vice versa) and without a derivative component due to the high noise of the signals[115].…”