Analysis of Power Grid Voltage Stability with High Penetration of Solar PV Systems

This paper investigates the transformerless single-phase inverter incorporates with the photovoltaic system along with the support of grid voltage. Solar Energy is a Non-Conventional Energy source which is mandatory for power generation due to their immeasurable parade and green pleasant nature. One-cycle control (OCC), Ruggedness and consistency which makes the interfacing with the grid easily. For grid interfacing, the inverter circuit does not need phase locked loop facility and are gradually being working for such solicitations. The strategy of the OCC inverter of one stage for solar PV applications is supported by means of a Sinusoidal Pulse Width Modulation to enhance inverter enactment at both low and high insolation levels. These factors allows the plan of a MPPT along P&O controller that pointedly progresses inverter playacting. Though, the OCC-based structures testified previous sensing of the grid voltage which slightly equalizers the strength of its characteristics, In order to dazed the restriction of prior researches, an One Cycle Control based grid-connected one-stage PV system is suggested. The sustainability of the suggested scheme is inveterate by performance simulation justification.

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Load Flow and Transient Stability Analyses for an Integrated Solar Combined Cycle Station in Iraqi Southern by Using ETAP

Journal of Siberian Federal University Engineering & Technologies ◽

10.17516/1999-494x-0285 ◽

2021 ◽

pp. 5-16

Author(s):

Ahmed Z. Abass ◽

Dmitry A. Pavlyuchenko ◽

Alexandr V. Prokopov ◽

Saadallah Hussain Zozan

Keyword(s):

Voltage Stability ◽

Reactive Power ◽

Short Circuit ◽

Power Grid ◽

Load Flow ◽

Combined Cycle ◽

Optimal Position ◽

Grid Voltage ◽

Voltage Instability ◽

Capacitor Banks

Analyses of a power system are important for designing and operating phase execution monitoring and to ensure reliable grid operations by sufficient protection projects settings. In this paper, electrical model of a 340 MW integrated solar combined cycle (ISCC) located in the south of Iraq, is developed by Electrical Transient Analyzer Program (ETAP) and load flow, voltage stability and short circuit analyses are performed. Impact of power grid voltage instability on system buses of the power plant is estimated. Using load flow analysis that use Newton-Raphson algorithm, buses operating at under voltage due to power grid voltage instability are specified and their voltages are improved according to given voltage limitation that are based on buses criticality with regard to loads. On-load tap changers and reactive power compensation are used to improve steady state voltage stability. Optimal position for capacitor banks placement and number of capacitor banks are proposed by using optimal capacitor placement module of ETAP. The use of modern technology and advance planning have a big impact on reducing losses. The article shows that the lack of planning is one of the main causes of energy losses. The parameters of the module also indicate the voltage limits, bus voltage and ratings of available capacitor banks. The voltage limit is set at 95% ≤ V ≤ 110%, and it is global for all buses

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Study on the Influence of VSC-HVDC on Receiving Power Grid Voltage Stability Margin and Improvement Measures

2018 International Conference on Power System Technology (POWERCON) ◽

10.1109/powercon.2018.8601614 ◽

2018 ◽

Cited By ~ 1

Author(s):

Lv Sizhuo ◽

Zheng Chao ◽

Song Xinfu ◽

Lv Pan

Keyword(s):

Voltage Stability ◽

Power Grid ◽

Stability Margin ◽

Grid Voltage ◽

Voltage Stability Margin ◽

Improvement Measures

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Analysis on the voltage stability on transmission network with PV interconnection

Bulletin of Electrical Engineering and Informatics ◽

10.11591/eei.v8i3.1632 ◽

2019 ◽

Vol 8 (3) ◽

Author(s):

Karmila Kamil ◽

Muhammad Amirul Ashraf Ab Rahman ◽

Chong Kok Hen ◽

Halimatun Hashim ◽

Mohd Helmi Mansor

Keyword(s):

Power System ◽

Power Flow ◽

Voltage Stability ◽

Network System ◽

Transmission Network ◽

Solar Photovoltaic ◽

Network Behavior ◽

Solar Pv ◽

High Penetration ◽

The Subject

Voltage stability means the ability of the power system network to maintain steady-state voltage value at all buses in the system under normal condition and after being subjected to a disturbance. This research highlights the effect of solar photovoltaic (PV) as the subject of disturbance to the network system as this kind of energy source has emerged towards higher level of integration into the national grid. High penetration of solar PV into the grid may cause several issues of stability and security to the system particularly effecting the normal voltage and line overloading. This research is focused on the simulation of power flow to study the transmission network behavior with and without the solar PV interconnection. To accomplish the research objectives, the network system will be modelled in a software known as Power System Simulator for Engineering (PSSE). The simulation result will be discussed and analyzed using Voltage Stability Indices (VSI) to prove and strengthen the theory behind the literature review.

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Active Power Management for PV Systems under High Penetration Scenario

International Journal of Photoenergy ◽

10.1155/2021/9940862 ◽

2021 ◽

Vol 2021 ◽

pp. 1-15

Author(s):

Fernando Medina ◽

Nimrod Vazquez ◽

Joaquín Vaquero ◽

Jaime Arau ◽

Leonel Estrada ◽

...

Keyword(s):

Power Management ◽

Power Flow ◽

Active Power ◽

Pv System ◽

Voltage Fluctuations ◽

Voltage Standard ◽

Grid Voltage ◽

Pv Systems ◽

Point Tracking ◽

High Penetration

Although PV systems are one of the most widely used alternatives as a renewable energy source due to their well-known advantages, there are significant challenges to address related to voltage fluctuations and reverse power flow caused by high PV penetration scenarios. As a potential solution to this problem, an active power management strategy is proposed in this work using a residential cluster as a benchmark. The proposed strategy is analyzed and experimentally verified, offering a simple way to reduce the voltage fluctuations by regulating the active power delivered by the PV system, achieving also relevant functionalities for the system, such as the regulation of the DC bus voltage, maximum power point tracking (MPPT), synchronization with the grid voltage, detection of high penetration conditions, and a simple strategy for the main controller with an effective performance. The proposal system shows satisfactory results being able to maintain grid voltage fluctuations within the voltage standard specifications.

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