scholarly journals The Role of Fast Frequency Response of Energy Storage Systems and Renewables for Ensuring Frequency Stability in Future Low-Inertia Power Systems

2021 ◽  
Vol 13 (10) ◽  
pp. 5656
Author(s):  
Pablo González-Inostroza ◽  
Claudia Rahmann ◽  
Ricardo Álvarez ◽  
Jannik Haas ◽  
Wolfgang Nowak ◽  
...  
Keyword(s):  
Power Systems ◽  
Frequency Response ◽  
Support System ◽  
Electrical Power ◽  
Frequency Stability ◽  
Renewable Generation ◽  
Major Power ◽  
Planning Stage ◽  
Expansion Planning ◽  
System Frequency

Renewable generation technologies are rapidly penetrating electrical power systems, which challenge frequency stability, especially in power systems with low inertia. To prevent future instabilities, this issue should already be addressed in the planning stage of the power systems. With this purpose, this paper presents a generation expansion planning tool that incorporates a set of frequency stability constraints along with the capability of renewable technologies and batteries to support system frequency stability during major power imbalances. We study how the investment decisions change depending on (i) which technology—batteries, renewable or conventional generation—support system frequency stability, (ii) the available levels of system inertia, and (iii) the modeling detail of reserve allocation (system-wide versus zone-specific). Our results for a case study of Chile’s system in the year 2050 show that including fast frequency response from converter-based technologies will be mandatory to achieve a secure operation in power systems dominated by renewable generation. When batteries offer the service, the total investment sizes are only slightly impacted. More precise spatial modeling of the reserves primarily affects the location of the investments as well as the reserve provider. These findings are relevant to energy policy makers, energy planners, and energy companies.

Software and Hardware Decision Support System for Operators of Electrical Power Systems

2021 ◽  
pp. 1-1
Author(s):  
Nikolay Ruban ◽  
Aleksey Suvorov ◽  
Mikhail Andreev ◽  
Ruslan Ufa ◽  
Alisher Askarov ◽  
...  
Keyword(s):  
Decision Support ◽  
Decision Support System ◽  
Power Systems ◽  
Support System ◽  
Electrical Power ◽  
Electrical Power Systems ◽  
Software And Hardware

Using Fast Frequency Response Services to Improve Frequency Stability of Low Inertia Power Systems

2018 ◽  
Author(s):  
Fassahat Ullah Qureshi ◽  
Gregor Verbic ◽  
Mehdi Garmroodi ◽  
Archie Chapman ◽  
Ahmad Shabir Ahmadyar
Keyword(s):  
Power Systems ◽  
Frequency Response ◽  
Frequency Stability

STUDY OF SUPPORT OF FREQUENCY STABILITY IN ELECTRICAL POWER SYSTEMS AT VOLTAGE 400 KV IN SYRIA

2020 ◽  
pp. 14-23
Author(s):  
AHMAD ALZAKKAR ◽  
◽  
NIKOLAI P. MESTNIKOV ◽  
ALHAJJ HASSAN FOUAD ◽  
ILGIZ M. VALEEV ◽  
...  
Keyword(s):  
Power Systems ◽  
Electrical Power ◽  
Frequency Stability ◽  
Electrical Power Systems

Investigation of Harmonic Current Aggregation in the TBE/Eletronorte Transmission System

2020 ◽  
Author(s):  
Maise N. S. da Silva ◽  
Rafael S. Salles ◽  
Alexandre Degan ◽  
Carlos A. Duque ◽  
Paulo F. Ribeiro
Keyword(s):  
Power Systems ◽  
Electrical Power ◽  
Transmission System ◽  
Phase System ◽  
Electrical Networks ◽  
Electrical Power Systems ◽  
Estimation Errors ◽  
Planning Stage ◽  
Harmonic Currents ◽  
Wide Range

Harmonic distortions are not new problems in electrical power systems. However, electrical networks have undergone several changes in recent decades, such as the wide range of electronic devices (converters, control devices, etc.), and those equipment produce emission of harmonic currents. The investigation of the contribution of several sources of harmonics in power systems is essential, considering that it is a problem of power quality that cannot be neglected. Thispaper aims to investigate the aggregation of harmonic currents in a 230kV TBE/Eletronorte system. For this, the transmission system was modeled using MATLAB/Simulink software with the typical values provided by TBE. A vectorial analysis was performed for the three-phase system and a sum analyzes of harmonics from different sources on Phase A, to estimate the influence of those current sources on Castanhal and Guama buses, when a harmonic spectrumis present on Vila do Conde and Utinga buses. In both analyzes, a phase angle spectrum of 10 and 20 degrees was applied in the harmonic source of Utinga. The summation analyzes proved to be useful because it can estimate values that harmonic currents can assume, for different conditions, and can be very useful in the planning stage to avoid estimation errors.

scholarly journals A new scaled fuzzy method using PSO segmentation (SePSO) applied for two area power system

2019 ◽  
Vol 9 (2) ◽  
pp. 815
Author(s):  
Balasim M. Hussein
Keyword(s):  
Power Systems ◽  
Power System ◽  
Frequency Response ◽  
Power Supply ◽  
High Performance ◽  
Frequency Control ◽  
Supply And Demand ◽  
Frequency Stability ◽  
Fuzzy Membership ◽  
Fuzzy Method

<p>The balance of the power supply and demand (frequency control) is one of the most ancient approaches for the power systems, which is considered as a highly complex system.The power systems frequency response is a perfect indicator of the resilience to the multi-disturbances. In this work, the fuzzy logichas been scaledusing PSO segmentation (SePSO) and suggested to get high performance of frequency stability. PSO has participated into multi-segments for calculating the scald-fuzzy membership with basic rules. Two identical interconnectedpower areas wereselected to exam the new scaled fuzzy method. The time response of the results has undertaken the effectiveness of the controller reactionusing the MATLAB Simulink. The work feed back proved that the proposed SePSO optimization for the controlhas significantly faster with low undershot concerningthe classical controllers in differenttime schedules and disturbance values.</p>

scholarly journals Primary Frequency Stability Support of a DFIG in Association With Pitch Angle Control

2022 ◽  
Vol 9 ◽  
Author(s):  
Xiuli Si ◽  
Xiaoxin Wu ◽  
Feng You ◽  
Hongliang Yuan ◽  
Yien Xu ◽  
...  
Keyword(s):  
Frequency Response ◽  
Pitch Angle ◽  
Frequency Stability ◽  
Response Strategy ◽  
Frequency Regulation ◽  
Electric Power Grid ◽  
Doubly Fed ◽  
Primary Frequency ◽  
Primary Frequency Response ◽  
System Frequency

For an electric power grid that has large penetration levels of variable renewable energy including wind generation and photovoltaics, the system frequency stability is jeopardized, which is manifest in lowering frequency nadir and settling frequency. This paper suggests an enhanced primary frequency response strategy of a doubly-fed induction generator (DFIG) in association with pitch angle control. The DFIG works in de-loaded operation with a certain reserve power via pitch angle control prior to disturbances for frequency regulation. To address this, a function of the pitch angle is employed that decreases the pitch angle with time to slowly feed the active power to the power gird. The simulation results demonstrate the effectiveness and feasibility of the proposed primary frequency response strategy including the settling frequency and frequency nadir.

scholarly journals Dynamic Frequency Support from a DFIG-Based Wind Turbine Generator via Virtual Inertia Control

2020 ◽  
Vol 10 (10) ◽  
pp. 3376 ◽  
Author(s):  
Dejian Yang ◽  
Enshu Jin ◽  
Jiahan You ◽  
Liang Hua
Keyword(s):  
Wind Speed ◽  
Power Systems ◽  
Wind Turbine ◽  
Control Strategy ◽  
Control Method ◽  
Frequency Stability ◽  
Virtual Inertia ◽  
Inertia Control ◽  
System Frequency ◽  
Inertia Response

As the penetrated level of wind in power grids increases, the online system inertia becomes weak. Doubly-fed induction generator (DFIG)-based wind turbine generators (WTGs) are required to provide virtual inertia response to support system frequency. The present inertia control strategy with fixed control gain is not suitable and may cause stall of the DFIG-based WTG, as the virtual inertia response potential from the DFIG-based WTG is different with various wind speed conditions. This paper addresses a virtual inertia control method for the DFIG-based WTGs to improve the system frequency stability without causing stalling of the wind turbine for various wind speed conditions. The effectiveness of the proposed virtual inertia control method is investigated in a small system embedded with the DFIG-based WTG. Results demonstrate that the proposed virtual inertia strategy improves the frequency stability without causing the rotor speed security issue. Thus, the proposed control strategy can secure the dynamic system frequency security of power systems under the scenarios of full and partial loads, and, consequently, the proposed method provides a promising solution of ancillary services to power systems.

scholarly journals Modeling the Impact of Modified Inertia Coefficient (H) due to ESS in Power System Frequency Response Analysis

Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 902 ◽  
Author(s):  
Muhammad Saeed Uz Zaman ◽  
Muhammad Irfan ◽  
Muhammad Ahmad ◽  
Manuel Mazzara ◽  
Chul-Hwan Kim
Keyword(s):  
Power Systems ◽  
Power System ◽  
Frequency Response ◽  
Frequency Control ◽  
Load Frequency Control ◽  
Response Analysis ◽  
Model And Simulation ◽  
Virtual Inertia ◽  
System Frequency ◽  
The Impact

The advantages of increased penetration of distributed generation are also accompanied by several challenges, low inertia being one of them, which threatens the grid stability. An emerging approach to confront this problem is the introduction of so-called virtual inertia (VI) provided by energy storage systems (ESS). In contrast to the already available literature which considers a conventional load frequency control (LFC) model, this work concentrates on a modified LFC model as the integration of a large portion of ESS changes the inertia constant ( H ) of a power system. A sensitivity function is derived that shows the effects of changes in H on the power system’s frequency response. With the help of the developed mathematical model and simulation results, it is shown that a difference in the actual and calculated values of H can deteriorate the system performance and economy. As one of the reasons for this difference is improper modeling of ESS in the LFC model, therefore, the study signifies the accurate calculation of H in the power systems having enlarged penetration of ESS.

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