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Dynamic analysis of a concentrating photovoltaic/concentrating solar power (CPV/CSP) hybrid system
摘要： Concentrating photovoltaic/concentrating solar power (CPV/CSP) systems suffer from varying irradiation and extreme working conditions. In this study, a dynamic physical model is developed for the CPV/CSP hybrid system to analyze the dynamic responses of several key parameters, such as the solar radiation saltation or linear variation to represent the typical weather variations. The results show that the hybrid system could rapidly reach the steady state in less than about 53 s after the solar radiation saltation increases or decreases by 10%. The response time reflects that the thermal hysteresis of the hybrid system is mainly determined by varying the outlet temperature of R134a from the solar thermal receiver. Meanwhile, when the solar radiation changes linearly, a lower gradient is beneficial to remit the thermal hysteresis of the hybrid system and improve the thermal stability, and the parameters could be treated as the steady state values with a gradient of less than 0.2 W m–2 s–1. Afterward, the quasi-steady state model was used to analyze the all-day dynamic performance of the hybrid system. It shows that the power output and the flow rate are directly related to the direct normal irradiance (DNI), while the outlet temperature of R134a vapor could be almost constant except for the starting and stopping periods.
关键词： solar radiation disturbance,concentrating solar power,dynamic performance,concentrating photovoltaic,transient simulation
更新于2025-09-19 17:13:59
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[IEEE 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Huangshan, China (2019.8.5-2019.8.8)] 2019 18th International Conference on Optical Communications and Networks (ICOCN) - High-Dynamic Optical Network Control Architecture Based on Spatiotemporal Synchronization
摘要： We present a novel high-dynamic optical network control architecture based on spatiotemporal synchronization. By introducing high-precision time synchronization, control coordination among nodes and controllers can be established to improve the network dynamic performance by orders of magnitude.
关键词： network dynamic performance,spatiotemporal synchronization,control coordination
更新于2025-09-16 10:30:52
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[IEEE 2019 IEEE 4th Colombian Conference on Automatic Control (CCAC) - Medellín, Colombia (2019.10.15-2019.10.18)] 2019 IEEE 4th Colombian Conference on Automatic Control (CCAC) - Assessment of Dynamic Voltage Support Control Schemes for Photovoltaic Generators Connected to Power Systems
摘要： Nowadays, the trend is that modern power systems operate with high penetration of photovoltaic generation, which must provide adequate voltage support in contingency situations. This paper presents an analysis and assessment of the effect on the dynamic performance of the voltage magnitude of two voltage control schemes of photovoltaic generators connected to power systems. Fault-ride through (FRT)-based dynamic voltage support schemes with and without injection of reactive power are evaluated. Study cases in the IEEE 14-bus test system are presented in which the performance of the contingency voltage response is assessed from dynamic voltage indices. Results showed that with a control scheme for photovoltaic systems which injects reactive power into the power system in the transient stage it is possible to avoid problems of fault-induced delayed voltage recovery (FIDVR) and fast voltage collapses.
关键词： Dynamic performance,Voltage control,Power systems,Photovoltaic generators
更新于2025-09-16 10:30:52
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[IEEE 2019 Third International Conference on Intelligent Computing in Data Sciences (ICDS) - Marrakech, Morocco (2019.10.28-2019.10.30)] 2019 Third International Conference on Intelligent Computing in Data Sciences (ICDS) - Photovoltaic Interfaced Shunt Active Power Filter Under Online-Varying Parameters Based On Fuzzy Logic Controller And Adaptive Hysteresis Band Current Controller
摘要： This paper explores performances of the photo-voltaic plant associated with shunt active power ?lter (PV-SAPF). The model guarantees uninterrupted power quality, with the bene?t of PV power injection. In order to improve the PV-SAPF dynamics and to reduce harmonic current distortion, the control of the proposed system is based on: 1) instantaneous PQ strategy for reference harmonic term identi?cation, 2) fuzzy logic controller for the Maximum power point tracking MPPT of the PV, 3) fuzzy logic based controller for DC capacitor voltage regulation, and 4) adaptive hysteresis current controller (AHCC) for the switching signals of the PV-SAPF system. The suggested control is performed in a Matlab/Simulink environment and compared with the conventional one using P& O algorithm, proportional integral controller and a ?xed hysteresis band controller. The results show that the proposed control adapted to PV-SAPF gives low value of total harmonic distortion THD and better dynamic performance in terms of references tracking under abrupt variation of the functioning point of the nonlinear load while applying a variable PV irradiance pro?le.
关键词： Fuzzy logic controller (FLC),Adaptive hysteresis current controller (AHCC),PV-SAPF,Dynamic performance,Total harmonic distortion (THD)
更新于2025-09-16 10:30:52
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Adaptive SMC for the Second-order Harmonic Ripple Mitigation: A Solution for the Micro-Inverter Applications
摘要： There have been several advanced topologies proposed by the community for Micro-Inverter applications. However, many such applications suffer from unwanted second-order harmonic current ripple at DC input. Moreover, in the absence of suitable passive filter or ripple compensator, the second-order harmonics ripple may inject into the DC source. This results in several problems to the system; related to system efficiency, life, cost, size, reliability and stability. The paper proposes an adaptive sliding mode controller to shape the output-impedance of the boost circuit of quasi-switched boost inverter such that the propagation of the ripple from DC link to the DC input source is resisted. The quasi-switched boost inverter is one of the advanced and suitable topology for the micro-inverter applications. The adaptive nature of the proposed controller improves the transient performance of the system at the line-load transients unlike some existing solutions which affects dynamics adversely to achieve ripple mitigation objective. The controller ensures voltage regulation within 5% at DC link. The proposed control technique is verified using a lab-prototype of 500 W quasi-switched boost inverter.
关键词： Dynamic performance,Low frequency ripple,Adaptive SMC,quasi-switched boost inverter
更新于2025-09-10 09:29:36