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Applied Sciences
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Control of Power Systems
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Control of Power Systems

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Energy Science and Technology".

Deadline for manuscript submissions: closed (30 September 2022) | Viewed by 7473

Special Issue Editor

Dr. Jožef Ritonja

E-Mail Website
Guest Editor
Faculty of Electrical Engineering and Computer Science, University of Maribor, Koroška cesta 46, 2000 Maribor, Slovenia
Interests: electric machines; control theory and applications; power systems
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In the past decade, we have witnessed intensive development and changes in the field of electric power systems. The changes are visible at all three of the following levels: in electricity generation, in transmission, and consumption. They are related to increasing the shares of renewable sources in production and electric vehicles through consumption, lowering prices, and increasing the capacity of electronic components and batteries, as well as the implementation of information technology in power system operations. Some of the consequences of the new situation are the changes in and the introduction of additional control systems in power systems. The changes are inevitable, because of the altered modes of operation of the power systems, reaching novel, strict requirements for transmission system operators, open transmission access, environmental constraints, and increased competitiveness.

The changes and introduction of additional control systems can influence the characteristics of the power system, reduce its damping, and can lead to an instability of the power system. The consequences of elevated stability problems are observed clearly in the increasing number of significant power system blackouts in recent years.

It is, therefore, crucial that those involved in working in the field of power system control have enough state-of-the-art knowledge, and that they have access to the experiences gained by engineers in other power systems. This is also the purpose of this Special Issue—that engineers and academics who have come up with new knowledge and findings while working in the field of power system control also transfer them to others. The area of interest for the Special Issue is vast. We expect contributions from the fields of the modeling, analysis, simulations, control, and optimization of individual components and entire power systems.

Dr. Jožef Ritonja
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • power systems
  • modeling
  • analysis
  • simulation
  • control
  • optimization

Published Papers (4 papers)

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Research

17 pages, 3359 KiB  
Article
Power System State Estimation Approach Considering Transmission Line Temperature
by Qingwen Xu, Hengxu Zhang, Yongji Cao, Hao Qin and Zhimin Gao
Appl. Sci. 2022, 12(19), 10171; https://doi.org/10.3390/app121910171 - 10 Oct 2022
Cited by 3 | Viewed by 1344
Abstract
The transmission line parameters vary with the change of temperature, which has a significant impact on power system state estimation (SE). Based on the theory of electro-thermal coordination (ETC), this paper proposes two ETC-SE approaches with the consideration of transmission line temperature. The [...] Read more.
The transmission line parameters vary with the change of temperature, which has a significant impact on power system state estimation (SE). Based on the theory of electro-thermal coordination (ETC), this paper proposes two ETC-SE approaches with the consideration of transmission line temperature. The heat balance equation (HBE) is combined with the conventional weighted least square SE for establishing an ETC-SE model. Moreover, an augmented Jacobian ETC-SE approach is developed by integrating the HBE into pseudo measurements and the line temperature into state vectors. The Jacobian matrix is augmented correspondingly and the partial differential coefficients of measurements to line temperature are provided, which enables to calculate line temperature and voltage phasors simultaneously. Furthermore, in order to accelerate the solving process, an improved two-step ETC-SE algorithm is proposed, in which the SE and temperature estimation are decoupled and solved via alternate iteration. The effectiveness of the proposed ETC-SE approaches is verified by the IEEE 14-, 39-, and 118-bus systems. The results show that the proposed ETC-SE approach is effective to reduce the calculation errors and possesses good convergence performance with varying environmental circumstances and ill-conditioned branches. Full article
(This article belongs to the Special Issue Control of Power Systems)
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22 pages, 80666 KiB  
Article
Dynamic Stability Analysis of Isolated Power System
by Ramūnas Deltuva, Robertas Lukočius and Konstantinas Otas
Appl. Sci. 2022, 12(14), 7220; https://doi.org/10.3390/app12147220 - 18 Jul 2022
Cited by 3 | Viewed by 1406
Abstract
The islanded mode of operation of an electric power system (EPS) that has generation capabilities provided by conventional thermal power plants, by a pumped-storage power station, or from an interlink with a neighboring electric power system through an HVDC BtB converter is addressed [...] Read more.
The islanded mode of operation of an electric power system (EPS) that has generation capabilities provided by conventional thermal power plants, by a pumped-storage power station, or from an interlink with a neighboring electric power system through an HVDC BtB converter is addressed in this paper. The risk for electrical power systems to fall into an islanded mode has recently grown, as it is caused not just by technical reasons but by a geopolitical situation as well. The current strains demand the close consideration of problems related to EPS operation in an islanded mode. This paper considers several. The research covers the following issues. The response of the islanded system to a sudden and spasmodic load change is analyzed in cases when the system deals with the disturbance with internal resources alone and with the help of an HVDC BtB converter’s frequency control functionality. Analysis of the impact of the settings of the HVDC BtB converter on the system’s response to disturbances is presented and the optimal set of parameters found. The impact of the system’s extended inertia on the system’s response is evaluated by using an additional unit of the pumped-storage power station in synchronous condenser mode. Transients in the system when switching a unit operating in synchronous condenser mode on and off are analyzed. The capability of the system to withstand major disturbances, such as disconnection of the pumped-storage power station’s unit operating in a pump mode and disconnection of the HVDC BtB converter in emergency modes, if a situation demands, is researched. The research is carried out by numerical simulations using PSS Sincal Electricity Basic software. Updated operating parameters of the isolated power system and the LCC HVDC BtB converter, as well as frequency control automation provided by ABB, were used in the simulations. Full article
(This article belongs to the Special Issue Control of Power Systems)
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22 pages, 9274 KiB  
Article
A Hybrid Approach for an Efficient Estimation and Control of Permanent Magnet Synchronous Motor with Fast Dynamics and Practically Unavailable Measurements
by Kashif Shahzad, Muhammad Jawad, Khurram Ali, Jahanzeb Akhtar, Ikramullah Khosa, Mohit Bajaj, Ehab E. Elattar and Salah Kamel
Appl. Sci. 2022, 12(10), 4958; https://doi.org/10.3390/app12104958 - 13 May 2022
Cited by 5 | Viewed by 1883
Abstract
This paper presents an interesting hybrid solution to a challenging estimation and control problem of the Permanent Magnet Synchronous Motor (PMSM). Apart from the inherently nonlinear nature of the PMSM, which makes this problem particularly challenging, is the unavailability of the measurements, rotor [...] Read more.
This paper presents an interesting hybrid solution to a challenging estimation and control problem of the Permanent Magnet Synchronous Motor (PMSM). Apart from the inherently nonlinear nature of the PMSM, which makes this problem particularly challenging, is the unavailability of the measurements, rotor position, and speed. In an effort to efficiently cope with such issues along with the random noise environment, the Unscented Kalman Filter (UKF) is chosen to estimate the states of the PMSM dynamic system and the Model Predictive Control (MPC) is utilized to control the state space vector in Pulse Width Modulation (PWM). Additionally, the MPC has also been implemented in combination with the Extended Kalman Filter (EKF) and also with Sliding Mode Control (SMC), in order to vigorously compare these hybrid approaches in terms of accuracy, robustness, and transient response. The MPC-UKF, a combination that has never been implemented before, outperforms the other two by efficiently dealing with the issues of high nonlinearities, by accurately estimating the states while the measurements were practically unavailable, and coping with the fast dynamics of the PMSM. Full article
(This article belongs to the Special Issue Control of Power Systems)
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15 pages, 1853 KiB  
Article
A Metaheuristic Harris Hawk Optimization Approach for Coordinated Control of Energy Management in Distributed Generation Based Microgrids
by Mahmoud Abdelsalam, Hatem Y. Diab and A. A. El-Bary
Appl. Sci. 2021, 11(9), 4085; https://doi.org/10.3390/app11094085 - 29 Apr 2021
Cited by 14 | Viewed by 1929
Abstract
Cost management of microgrids represents a real challenge since the power generation of microgrids is usually composed of different renewable and non-renewable sources. Additionally, it is always desired to make a connection between the microgrid and national grid to secure the load demand [...] Read more.
Cost management of microgrids represents a real challenge since the power generation of microgrids is usually composed of different renewable and non-renewable sources. Additionally, it is always desired to make a connection between the microgrid and national grid to secure the load demand and to fit the regulations of liberated energy markets. Because of all these reasons, it is essential to develop a smart energy management unit to control different energy resources within the microgrid to achieve minimum operation costs. This paper presents a proposal for a smart unit for the cost management and operation of multi-source based microgrids. The proposed unit utilizes the Harris hawk optimization (HHO) algorithm which is used to optimize the cost of operation based on current load demand, energy prices and generation capacities. The proposed unit is tested on a microgrid with different energy resources using MATLAB while applying different operation scenarios. All simulation results show that the proposed unit succeeds in operating the microgrid at minimum cost. Obtained results are compared with other optimization algorithms and the proposed Harris hawk algorithm gives superior performance. Full article
(This article belongs to the Special Issue Control of Power Systems)
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