An Adaptive Setting of Frequency Relay with Consideration on Load and Power System Dynamics
نویسندگان
چکیده
This paper presents a new approach for setting frequency relays based on the dynamic of power system. A simplified model of the power system based on the load-frequency control loop will be developed to be used instead of the complete model of the power system. The effects of the equipments and their responses on the frequency variations of the power plant will be investigated and then a method for adaptive settings of frequency relays will be explained. The proposed method will be investigated by analyzing a simplified model of a power plant by MATLAB software. Keywords—Adaptive Settings, Frequency Relay (FR), Power System Dynamics, SFR model.
منابع مشابه
Adaptive Setting of UFLS Relay Using Hourly Programming with Consideration of Renewable Energy Sources in Smart Grid
In the light of the emergence of smart grids, the functions associated with this type of grids in the blocks of the energy management system require the adoption of robust strategies in order to provide a higher level of control and protection. Under-frequency load shedding (UFLS) sheds load blocks when the frequency drop is below the threshold limit. In adaptive UFLS, in an advanced telecommun...
متن کاملZone-3 Impadance Reach Setting of Distance Relays by Including In-feed Current Effects in an Adaptive Scheme
The undesired operation of zone 3 may be one of the most conspicuous protective relay features due to the incorrect zone 3 relay operations which have been conducive to the severity of blackouts. Therefore, determining the accurate zone 3 setting of the distance relay is deemed to be necessary. This paper focuses on the development of a new technique for calculating zone-3 setting of distance r...
متن کاملEnhancement of Power System Voltage Stability Using New Centralized Adaptive Load Shedding Method
This paper presents a new centralized adaptive method under frequency load shedding. Sometimes, after initial frequency drop following severe disturbances, although the system frequency returns to its permissible value, however, the system might become unstable due to voltage problems. In this regard, the paper proposes a new centralized adaptive load shedding method to enhance the voltage stab...
متن کاملبهبود پایداری شبکه قدرت با روش جدید حذف بار ترکیبی
Power system blackouts have become a serious problem for electric utilities especially in recent years. Different forms of system instability have emerged in recent blackouts, such as voltage instability and frequency instability. To counteract each form of system instability, special algorithms have been designed in the protection system, e.g. Under Frequency Load Shedding (UFLS) and Under Vol...
متن کاملOptimal Setting Sor Under Frequency Load Shedding Relays Using Mixed Integer Linear Programming
After occurrence of some disturbances in power system that causes the sever imbalance between generation power and electrical load, the power system frequency begins to decrease. To prevent power system frequency instability and stop the frequency decay below the power system allowable frequency limitation, load shedding schemes should be utilized by applying under frequency load shedding relay...
متن کامل