Research on a New Control Strategy of Multi-Energy Complementary Isolated Power System

2012 ◽  
Vol 614-615 ◽  
pp. 1027-1032 ◽  
Author(s):  
Dan Huang ◽  
Hong Shen ◽  
Xiu Yuan Yang ◽  
Qin Yong Zhou
Keyword(s):  
Power System ◽  
Output Power ◽  
Control Strategy ◽  
Storage Device ◽  
Diesel Generator ◽  
Model And Simulation ◽  
Simulation Based ◽  
Array Output ◽  
Fast Variation ◽  
System Characteristics

Aiming at a kind of multi-energy complementary isolated power system in Tibet ali area, which consists of photovoltaic (PV) station with storage device, hydro generator, and diesel generator, a new control strategy was presented. According to the power system characteristics, analyzed the new control strategy, it can realize the grid power output with zero steady-state error. In the DIgSILENT/PowerFactory simulation environment, building the multi-energy complementary isolated power system model and simulation based on the control strategy, the system can track the fast variation of the PV array output power or other output power. Two studied cases verify the control strategy.

Fuzzy Control of Supercapacitor Current in Hybrid Diesel Generator/Fuel Cell Marine Power System

2015 ◽  
Vol 12 (2) ◽  
Author(s):  
Amin Hajizadeh ◽  
Amir Hossein Shahirinia ◽  
David C. Yu
Keyword(s):  
Fuel Cell ◽  
Fuzzy Control ◽  
Power System ◽  
Control Strategy ◽  
Current Control ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Diesel Generator ◽  
Storage Unit ◽  
Power Sources

This paper presents a power control strategy for a marine power system made up of a hybrid diesel generator, a fuel cell, and an energy storage unit. For this purpose, a self-tuning fuzzy control is designed to manage the power generation between power sources during different maneuverings and voltage disturbances (both balanced and unbalanced) in an AC system. As a solution, a current control strategy using a voltage source converter is presented. Simulation results show the response of the whole system under a test driving cycle and this variety of voltage disturbance conditions. They illustrate the performance, including power flow control and voltage disturbance ride-through capability, of the proposed control strategy.

scholarly journals Flexible Power System Defense Strategies in an Isolated Microgrid System with High Renewable Power Generation

2020 ◽  
Vol 10 (9) ◽  
pp. 3184
Author(s):  
Yuan-Kang Wu ◽  
Kuo-Ting Tang ◽  
Zheng Kuan Lin ◽  
Wen-Shan Tan
Keyword(s):  
Power Generation ◽  
Power System ◽  
Control Strategy ◽  
Frequency Stability ◽  
Operating Costs ◽  
Diesel Generator ◽  
Preventive Control ◽  
Defense Strategies ◽  
Renewable Power ◽  
Renewable Power Generation

This work develops an underfrequency preventive control strategy for an islanded power system with a high penetration of wind power generation. First, the preventive control strategy uses the frequency nadir forecasting module to analyze the frequency stability under largest diesel generator tripping (N-1) contingency events. If predicted frequency nadir is too low, four frequency support methods are then analyzed and used for preventing potential frequency stability problem. They include generator rescheduling (GR), the use of battery energy storage system (BESS), direct load control (DLC) and emergency demand response program (EDRP). In terms of the GR method, the optimal diesel generator dispatch is obtained, with sufficient frequency stability and minimal fuel cost and start-up cost. In the BESS method, the optimal instantaneous power output from BESS is obtained based on its frequency support capability. With the DLC or EDRP method, the optimal contract-based load-shedding or the load-reduction to provide frequency support is obtained, respectively. Then, the operating costs of each method to support frequency are analyzed. The research methods and simulation results are very useful to the low-frequency protection of actual power systems with high renewable power generation. This work proposed a complete defense strategy in a microgrid system. It combines GR, BESS, DLC and EDRP. Therefore, the system operators have many options to implement their defense strategies, based on the operating costs of various methods. In other words, the proposed defense strategy provides a more flexible solution for the protection of micro grids with a high renewable power penetration. Therefore, the solution considers the system safety and economical aspects.

Utilization of Energy Storage to Buffer PV Output during Cloud Transients

2014 ◽  
Vol 705 ◽  
pp. 295-304
Author(s):  
Yacouba Moumouni ◽  
Robert F. Boehm
Keyword(s):  
Energy Storage ◽  
Output Power ◽  
Control Strategy ◽  
Fast Moving ◽  
Storage Device ◽  
Peak Time ◽  
Energy Storage Device ◽  
Energy Research ◽  
Constant Amount ◽  
Cloud Coverage

Consideration of the use of the major types of energy storage is attempted in this paper to mitigate the effects of power transients associated with grid-tied CPV systems due to fast-moving cloud coverage. The approach presented is to buffer intermittency of CPV output power with an energy storage device (used batteries) purchased cheaply from EV owners or battery leasers. When the CPV is connected to the grid with the proper energy storage (54kW), the main goal is to smooth out the intermittent solar power and fluctuant load of the grid with a convenient control strategy. Actual summer 2011 data collected at the Center for Energy Research (CER), UNLV are utilized for the purpose of this study. Hence, appropriate simulations have proven that not only the unit ( Amonix 7700) is capable of putting onto the grid during the day time a constant amount of power (20kW), but also is able to shift the less valuable off-peak electricity to the on-peak time (1pm to 7pm), where the electricity price is much better.

scholarly journals Ecological and Economical Friendly Analysis of A Hybrid Solar-Grid-Diesel Connected Power Generation System

2018 ◽  
Vol 7 (1) ◽  
pp. 1
Author(s):  
Rafat Qonain ◽  
Malik Rafi ◽  
Imran Khan ◽  
Shivley Sageer
Keyword(s):  
Power Generation ◽  
Power System ◽  
Power Quality ◽  
Primary Energy ◽  
Energy Sources ◽  
Diesel Generator ◽  
Hybrid Power System ◽  
Hybrid Power ◽  
Model And Simulation ◽  
Power Generation System

<p>This paper presents Importance of hybrid power system. This paper depicts model and simulation of a renewable energy based hybrid power system for improving power quality because optimal utilization of primary energy sources will increase the level of supply reliability. The combination of Grid, Photo Voltaic (PV) Array System, and Diesel generator systems are used for power generation. Due to variation in output power of solar panel, Diesel engine is also coupled to ensure reliable supply under all conditions. The results shows that the proposed hybrid power system can effectively manage the optimal utilization of primary energy sources and improves the power quality in an islanding as well as grid connected mode.</p>

Four - Wheel Steering Vehicle Modeling and Simulation Based on ADAMS

2013 ◽  
Vol 690-693 ◽  
pp. 2796-2799
Author(s):  
Wen Ting Wang
Keyword(s):  
Control Strategy ◽  
High Speed ◽  
Experimental Simulation ◽  
Motor Vehicles ◽  
Prototype Model ◽  
Vehicle Modeling ◽  
Model And Simulation ◽  
Simulation Based ◽  
Speed Stability ◽  
Simulation Results

Based on ADAMS CAR module, and the establishment of four - wheel steering vehicle virtual prototype model of the Motor Vehicles ( the WS ). Front and rear comer is proportional to the control strategy, the angle step experimental simulation model and simulation results are analyzed. The results showed that 4WS cars can improve low speed maneuverability and high speed stability, but high speed likely to increase driver fatigue strength.

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