Capability curve analysis of photovoltaic generation systems

Cabrera-Tobar, Ana; Bullich‐Massagué, Eduard; Aragüés‐Peñalba, Mònica; Gomis‐Bellmunt, Oriol

doi:10.1016/j.solener.2016.11.014

Cited by 33 publications

(12 citation statements)

References 2 publications

(1 reference statement)

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“…It is worth to point out that the control of reactive power in a LS-PVPP has not commonly been developed considering the capability curves. There are four main parameters that characterize these curves: (i) modulation index, (ii) dc voltage, (iii) solar irradiance, and (iv) ambient temperature, as it is explained in [30,31]. From this research, it can be understood that the variation of the dc voltage and the modulation index can help to have the complete curve despite the variation of ambient conditions.…”

Section: Introductionmentioning

confidence: 84%

“…The third task, it is in charge of the delivering of the power demanded by the PPC. This control should consider the PQ capability curves of the PV generator analysed in [30] and the variation of ambient conditions as solar irradiance and ambient temperature.…”

Section: Configuration and Control Structurementioning

confidence: 99%

“…If the reactive power control is not a priority, the control is developed with a conventional reactive power regulation. But if the reactive power is set as a priority, then the PV generator has to calculate the maximum possible reactive power (q mpp ) by taking into account the capability curves studied in [30] and the variation of ambient conditions. The performance of the control will vary depending if it is absorbing or injecting reactive power.…”

Section: Reactive Power Controlmentioning

confidence: 99%

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Active and Reactive Power Control of a PV Generator for Grid Code Compliance

et al. 2019

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As new grid codes have been created to permit the integration of large scale photovoltaic power plants into the transmission system, the enhancement of the local control of the photovoltaic (PV) generators is necessary. Thus, the objective of this paper is to present a local controller of active and reactive power to comply the new requirements asked by the transmission system operators despite the variation of ambient conditions without using extra devices. For this purpose, the control considers the instantaneous capability curves of the PV generator which vary due to the change of solar irradiance, temperature, dc voltage and modulation index. To validate the control, the PV generator is modeled in DIgSILENT PowerFactory ® and tested under different ambient conditions. The results show that the control developed can modify the active and reactive power delivered to the desired value at different solar irradiance and temperature.

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Section: Introductionmentioning

confidence: 84%

Section: Configuration and Control Structurementioning

confidence: 99%

Section: Reactive Power Controlmentioning

confidence: 99%

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Active and Reactive Power Control of a PV Generator for Grid Code Compliance

et al. 2019

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“…Contrary to the reported concerns in [30], it can be observed that the fault current levels are not affected and instead remain above the pickup current threshold throughout the case study when the solar irradiance level is changed. This is because the change of the solar irradiance level will only affect the real power (active current) but not the reactive power (reactive current) [33]. Since the proposed RCI control only injects a reactive fault current, the change of weather condition will therefore not affect its performance.…”

Section: Performance Evaluation Under Changing Weather Conditionsmentioning

confidence: 99%

A Novel Reactive Current Injection (RCI) Control for Microgrid Protection with Inverter Based Distributed Generation (IBDG)

et al. 2019

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As the development of renewable distributed generations (DGs) is growing rapidly, the autonomous self-healing microgrid had emerged as an effective solution for integrating renewable DGs in the distribution networks. However, before the autonomous self-healing microgrid can be realized, one of the main issues that needs to be resolved is the ability to utilize the most cost-effective protection system-overcurrent relays-to achieve the goal. However, the overcurrent relay is insensitive to the limited fault current contributed by the inverter-based distributed generation (IBDG). Therefore, this paper will propose a novel inverter fault current control with a reactive current injection (RCI) that injects the correct fault current vector, albeit with a limited magnitude, for detection by the cost-effective directional overcurrent relay. This paper will also evaluate the performances of the different RCI controls in delivering an efficient self-healing microgrid protection based on a directional overcurrent relay. The proposed self-healing protection scheme is tested with both a simple distribution test network and also the IEEE 16 bus test system, considering random system parameters like variations in IBDG location, fault location, load capacity and load power factor. Moreover, the performance of the proposed inverter RCI control is also tested under changing weather conditions. Energies 2019, 12, 3371 2 of 19 loads. Even if there were a downstream DG, it would have to cease its operation within 2 s in accordance with IEEE 1547IEEE -2003. At this moment, since the generations of renewable energy DGs only occupy a relatively small amount of the total generation capacity, the impacts of renewable DG disconnection are negligible. However, with the rapid growth of renewable DGs, the installed capacity will hit a substantial level, and any indiscriminate disconnection of renewable DGs may induce grid parameter variations that can lead to serious events such as a wide-scale blackout [7]. For example, it was shown in [8] that the severity of a voltage sag will increase as more renewable DGs are disconnected during a disturbance. Hence, the revision to the existing grid codes and standard are required by considering the renewable DG penetration level, in particular with regard to its response to grid disturbances.As a result, the concept of a low voltage ride through (LVRT) emerges as an alternative solution to prevent renewable DGs from disconnecting during a disturbance. During a fault-induced low voltage condition, instead of ceasing the DGs and interrupting the downstream loads due to the conventional protection intervention, an island can be formed so that the DGs remains energized to power the downstream loads. Once the disturbance is cleared, the DGs and loads will be reconnected to the main grid. Such a process is known as an autonomous self-healing microgrid, where a high reliability and high power quality can be achieved during the process. In fact, the system configuration for an intentional island, which is als...

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“…Each static converter must work inside its capability curve, designed starting from voltage limitation, current limitation, active power limitation and thermal limitations, related to the maximum admissible temperature, as exposed in [18]. The value PF = 0.9 represents the limit of this kind of constrain for all the PV inverters.…”

Section: S889mentioning

confidence: 99%

Comparison of the reactive control strategies in low voltage network with photovoltaic generation and storage

2018

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The aim of this study is to analyze the different decentralized voltage control strategies, based on the reactive power control of photovoltaic inverters. The study focuses on evaluating their impact in terms of reactive power demanded from the grid, due to the regulation, and active losses in the network and in the photovoltaic inverters. In a second step, the presence of battery energy storage systems in the network is considered and further analysis are performed, in order to take into account the overvoltage mitigation by peak shaving of the photovoltaic generation. All the simulations are performed in MATLAB/SIMULINK, where the model of a single-phase low-voltage distribution network with distributed generation sources is implemented.

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Capability curve analysis of photovoltaic generation systems

Cited by 33 publications

References 2 publications

Active and Reactive Power Control of a PV Generator for Grid Code Compliance

Active and Reactive Power Control of a PV Generator for Grid Code Compliance

A Novel Reactive Current Injection (RCI) Control for Microgrid Protection with Inverter Based Distributed Generation (IBDG)

Comparison of the reactive control strategies in low voltage network with photovoltaic generation and storage

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