Frequency Response Model of Power System in Presence of Thermal, Wind and Hydroelectric Units

• Published in: Journal of electrical engineering & technology Vol. 18; no. 4; pp. 2599 - 2607
• Main Authors: Darani, Shirin Hassanzadeh, Rabbanifar, Payam, Aliabadi, Mahmood Hosseini, Radmanesh, Hamid
• Format: Journal Article
• Language: English
• Published: Singapore Springer Nature Singapore 01.07.2023; 대한전기학회
• Subjects: Electrical Engineering; Electrical Machines and Networks; Electronics and Microelectronics; Engineering; Instrumentation; Original Article; Power Electronics; 전기공학; Frequency constraint; Order reduction; Hydroelectric unit; Unit commitment; Thermal unit; Frequency response model; Routh stability criterion method; Optimization; Wind farm
• ISSN: 1975-0102; 2093-7423
• DOI: 10.1007/s42835-022-01356-0

Loss of large generation units or unforeseen changes in consumption load causes disturbances in power system operation. Operators face serious challenges by increasing the penetration level of renewable energies in unit commitment and inability of these resources in providing inertial frequency response. Therefore, having system frequency response model makes operators to have a better understanding of system function and frequency behavior encounter disturbances and critical situations. This paper, studies the importance and necessity of recognizing the frequency response model and presents an integrated model of system frequency response in the presence of thermal, wind and hydroelectric units. Using the Routh stability criterion method, the proposed fifth-order model converts to a second-order model with an acceptable approximation. Proposed system frequency response in a six-bus power system is investigated and effect of changes in the main components on the frequency behavior of system is checked out. Researchers can linearize the obtained frequency response model using conventional linearization methods and use it as a frequency constraint in optimization and security-constrained unit commitment problems. Besides that, frequency behavior of the power system consisting of thermal units after addition of wind and hydroelectric units is studied. This paper helps researchers to have simplified calculation, beneficial and accurate results, while saving time, money and fossil reserves.