Study of the Operational Characteristics of Isolated Grid Fed with Hydro Generators, Diesel Generators and Photovoltaic Power Station

2011 ◽  
Vol 354-355 ◽  
pp. 959-963
Author(s):  
Xiao Qing Qi ◽  
Wei Cao ◽  
Da Fei Wang ◽  
Da Hong Wang ◽  
Yu Li ◽  
...  
Keyword(s):  
Operating Characteristic ◽  
Power Supplies ◽  
System Stability ◽  
Frequency Regulation ◽  
Power Station ◽  
Response Characteristics ◽  
Operational Characteristics ◽  
Diesel Generators ◽  
Primary Frequency ◽  
Power Response

When the isolated grid is influenced by disturbance，the power response characteristics of power supplies have an important impact on the operating characteristic of the isolated grid. Ali grid with non-energy storage PV power station was studied and simulated with PSASP software in this paper. The result shows that it is important to make sure the diesel generators participate in primary frequency regulation of the grid to enhance the system stability, especially in the case of PV power output disturbances.

scholarly journals Profitability of Frequency Regulation by Electric Vehicles in Denmark and Japan Considering Battery Degradation Costs

2020 ◽  
Vol 11 (3) ◽  
pp. 48 ◽  
Author(s):  
Lisa Calearo ◽  
Mattia Marinelli
Keyword(s):  
Lithium Ion ◽  
Frequency Regulation ◽  
Economic Framework ◽  
Domestic Prices ◽  
Market Framework ◽  
Battery Degradation ◽  
Primary Frequency ◽  
The Cost ◽  
Power Response ◽  
Full Activation

This paper determines the profitability of the primary frequency regulation (FR) service considering the wear of the electric vehicle (EV) battery as a cost. To evaluate the profitability of the FR service, the cost of degradation from FR provision is separated from the degradation caused by driving usage. During FR, the power response is proportional to the frequency deviation with full activation power of 9.2 kW, when deviations are larger than 100 mHz. The degradation due to FR is found to be an additional 1–2% to the 7–12% capacity reduction of a 40 kWh Lithium-ion NMC battery pack over 5 years. The overall economic framework is applied in Denmark, both DK1 and DK2, and Japan, by considering historical frequencies. The DK2 FR market framework is taken as reference also for the Japanese and the DK1 cases. Electricity prices and charger efficiency are the two main parameters that affect the profitability of the service. Indeed, with domestic prices there is no profitability, whereas with industrial prices, despite differences between the frequencies, the service is similarly profitable with approx. 3500€ for a five-year period.

scholarly journals Characteristic Analysis and Optimal Regulation of Primary Frequency Regulation Condition in Low Water Head Area Based on Hydraulic-Mechanical-Electrical Coupling Model of Pumped Storage Unit

Complexity ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-17 ◽  
Author(s):  
Cong Lv ◽  
Yanhe Xu ◽  
Xin Wu ◽  
Qing Zhang
Keyword(s):  
Power Grid ◽  
Electrical Coupling ◽  
Frequency Regulation ◽  
Regulation System ◽  
Optimization Strategy ◽  
Power Station ◽  
Storage Unit ◽  
Pump Turbine ◽  
Pumped Storage ◽  
Primary Frequency

Pumped storage power station is an important regulating tool for peak load regulation and frequency regulation of the power grid, especially its primary frequency regulation function, which is of profound significance for the safety and stability of the power grid. As the core equipment of the pumped storage power station, the reversible design of the pump turbine makes it easy to have hydraulic fluctuation and mechanical instability when the unit runs to the “S” characteristic area, which will cause the frequency oscillation of the generator under the condition of primary frequency regulation. Therefore, some innovative work is studied in this paper: (1) an accurate hydraulic-mechanical-electrical coupling system mathematical model of pumped storage unit regulation system (PSURS) is established based on full characteristic curve of the pump turbine and seventh-order synchronous generator and excitation system; (2) the dynamic response characteristics of primary frequency regulation of pumped storage unit (PSU) under different water heads and different frequency disturbances are analyzed by numerical simulation; (3) in view of the unstable condition of the unit under the large frequency disturbance when it operates in the low head and small load area, the objective optimization function considering the ITAE index of hydraulic, mechanical, and electrical factors is proposed; and (4) fractional-order PID controller and the bacterial-foraging chemotaxis gravitational search algorithm (BCGSA) combined optimization strategy is used for PSURS optimization regulation and parameter optimization. The results show that the joint optimization strategy proposed in this paper has smaller objective function value, and makes the PSURS pass through the unbalanced area quickly, with better primary frequency regulation speed and smaller regulation depth.

A Robust Control Approach for Primary Frequency Regulation through Variable Speed Wind Turbines

2010 ◽  
Vol 130 (11) ◽  
pp. 1002-1009 ◽  
Author(s):  
Jorge Morel ◽  
Hassan Bevrani ◽  
Teruhiko Ishii ◽  
Takashi Hiyama
Keyword(s):  
Robust Control ◽  
Wind Turbines ◽  
Frequency Regulation ◽  
Variable Speed ◽  
Control Approach ◽  
Primary Frequency

scholarly journals Primary Frequency Regulation of Intelligent Building-type Virtual Power Plant

2021 ◽  
Vol 1966 (1) ◽  
pp. 012053
Author(s):  
Yong Cui ◽  
Fei Xiao ◽  
Jun Gu ◽  
Weihong Wang ◽  
Liang Cao ◽  
...  
Keyword(s):  
Power Plant ◽  
Frequency Regulation ◽  
Virtual Power ◽  
Intelligent Building ◽  
Virtual Power Plant ◽  
Building Type ◽  
Primary Frequency
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