scholarly journals Wind Turbine Speed Compound Control of a New-Type Wind-Electric Hybrid Power Pumping Unit

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
Chunyou ZHANG ◽  
Lihua WANG
Keyword(s):  
Wind Speed ◽  
Power System ◽  
Control Method ◽  
Mathematic Model ◽  
Hybrid Power System ◽  
Feed Forward ◽  
Feed Forward Control ◽  
Hybrid Power ◽  
New Type ◽  
Pumping Unit

Because the load of the oil beam pumping unit driven by pure electric motor changes sharply during operation, the power of the driving motor does not match and the energy efficiency is low. In this paper, a new type of wind-driven hydro-motor hybrid power system is proposed. The motor and the hydraulic motor are jointly driven, and the energy is recovered by a hydraulic pump with controllable displacement, so that the speed of the driving motor is relatively stable. In order to control the fan speed and keep up with the drastic changes of the outside wind speed, a control strategy of hybrid power system based on wind speed feed-forward compensation is proposed. Through simulation and experimental results, the following conclusions can be drawn: to begin with, the mathematic model is proved to be effective; next, simulation studies show that the proposed feed-forward control method can improve the response rate as well as reduce the response lag. This research can be a reference for the application of the feed-forward control method on the hybrid power system of beam pumping unit.system.

Research of the Power Control for a MCFC/GT Hybrid System

2013 ◽  
Vol 860-863 ◽  
pp. 2596-2599
Author(s):  
Fan Yang ◽  
Hua Xue ◽  
Hao Li
Keyword(s):  
Power System ◽  
Hybrid System ◽  
Control Method ◽  
Molten Carbonate Fuel Cell ◽  
Support Vector ◽  
Molten Carbonate ◽  
Hybrid Power System ◽  
Feed Forward Control ◽  
Hybrid Power ◽  
Carbonate Fuel Cell

Molten carbonate fuel cell/ gas turbine hybrid power system (MCFC/GT) output power should real-time response the demand of load. The auto-tuning ZieglerNichols tuned PI controller (AZNPIC) as a feedback controller for power corrective action is added to the hybrid power system. The optimal setpoints and feed forward control inputs of the controller are given by Multi-output Support Vector Machine Regression (MSVR) predictor for the hybrid system. Simulation results show that the power of hybrid system can be effectively close to the desired setpoints based on the control method.

scholarly journals Research on Marine DAB bidirectional DC converter based on DPS

2021 ◽  
Vol 248 ◽  
pp. 02064
Author(s):  
Chang Li ◽  
Xujing Tang ◽  
Zhongze Zhang ◽  
Yupeng Yuan
Keyword(s):  
Phase Shift ◽  
Power System ◽  
Control Algorithm ◽  
Power Transmission ◽  
Control Method ◽  
Mode Switching ◽  
Hybrid Power System ◽  
Current Stress ◽  
Hybrid Power ◽  
Shift Control

This paper takes the application of bidirectional DC-DC converter in Marine hybrid power system as the background, the problems of high reflow power and current stress in dual active bridge converter under traditional phase shift control are studied in this paper. Based on the dual phase shift control strategy, the power transmission optimization algorithm model is analyzed and derived, and a control method for optimizing mode switching is proposed. The optimized control algorithm is validated by Matlab/Simulink simulation experiment. The results show that the reflow power and current stress optimization control algorithm can effectively reduce the reflow power and the current stress of the converter, so as to improve the operation performance of DAB converter in high-power ship hybrid power system.

A Novel Fused Converter for Hybrid Power Systems

2014 ◽  
Vol 984-985 ◽  
pp. 744-749
Author(s):  
W. Margaret Amutha ◽  
Renugadevi ◽  
V. Rajini
Keyword(s):  
Wind Speed ◽  
Power Systems ◽  
Power System ◽  
Rural Areas ◽  
Power Flow ◽  
Electrical Energy ◽  
Hybrid Power System ◽  
Hybrid Power ◽  
Different Seasons ◽  
Continuous Power

—Hybrid power system consists of different sources of electrical energy with different operating times during different seasons. Deployment of a hybrid power system is expected in rural areas. Supplying remote load systems such as rural telephony, hospitals, military etc.., where continuous power supply is required, can be realized with the combination of wind and solar power. The proposed topology is designed for telecom load which uses dual input dc-dc fused converter for combining solar and wind energy sources. For the further research and improvements in the proposed fused converter topology, it is necessary to know in detail the power flow from solar and wind sources to the load or to storage battery depending on different seasons. For various wind speed with constant solar irirradiation and, for various solar irirradiations with constant wind speed, the power flow of the hybrid power system is simulated and presented. The same topology is investigated for different switching frequencies (10 kHz and 20 kHz), using MATLAB/SIMULINK, and the efficiencies are calculated.

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