scholarly journals Speed Control for Turbine-Generator of ORC Power Generation System and Experimental Implementation

Energies ◽  
2019 ◽  
Vol 12 (2) ◽  
pp. 200 ◽  
Author(s):  
Hyung-Seok Park ◽  
Hong-Jun Heo ◽  
Bum-Seog Choi ◽  
Kyung Chun Kim ◽  
Jang-Mok Kim
Keyword(s):  
Power Generation ◽  
Control Method ◽  
Estimation Method ◽  
Speed Control ◽  
Positive Sequence ◽  
Speed Estimation ◽  
Generation System ◽  
Actual System ◽  
Turbine Generator ◽  
Power Generation System

This paper presents a rotation speed estimation and an indirect speed control method for a turbine-generator in a grid-connected 3-phase electrical power conversion system of an organic Rankine cycle (ORC) generation system. In addition to the general configuration mechanism and control techniques that are required in the grid-connected ORC power generation system, the indirect speed control method using the grid-side electric power control and the speed estimation method is proposed for the proper speed control of turbine-generators. The speed estimation method utilizes a digital phase-locked loop (PLL) method that uses a state observer to detect the positive-sequence voltages. A 10 kW system where a Motor-Generator set is used as a turbine simulator and a 23 kW actual system for the grid-connected ORC power generation were designed and manufactured, respectively. This paper includes various experimental results obtained from field tests conducted on actual installed ORC systems.

The Study of Wind Turbine Based on Fuzzy Logic

2013 ◽  
Vol 385-386 ◽  
pp. 1122-1126
Author(s):  
Yue Hua Huang ◽  
Qian Cheng Li ◽  
Chen Chen ◽  
Na Peng ◽  
Zuo Dong Duan ◽  
...  
Keyword(s):  
Power Generation ◽  
Fuzzy Logic ◽  
Renewable Energy ◽  
Wind Turbine ◽  
Wind Power ◽  
Control Method ◽  
Wind Power Generation ◽  
Generation System ◽  
Pitch Control ◽  
Power Generation System

Due to the lack of fossil fuels, people are paying more and more attention to renewable energy. Wind energy is one of the important renewable energy. Unpredictability and volatility of the wind source make the output power unstable, so we need to control the active Power. This paper uses fuzzy control method, and the simulation results show that fuzzy control method mentioned in this paper is better than the conventional PI control for Wind power, the nonlinear system. Based on the analysis of pitch control theory and control process, we design fuzzy pitch controller and its model. We simulates gust wind speed imitates, wind turbine control and verifies the effects of the blur pitch control in a constant speed and constant frequency wind power generation system. According to the results of the simulation, we know the pitch controller of fuzzy logic has a better effect on the active control of the generator of the wind power generation system.

Unscented Kalman filtering method for scheduling photovoltaic power generation system fluctuations

2020 ◽  
pp. 095765092095008
Author(s):  
Zheng Li ◽  
Liping Zhang ◽  
Rui Zhang ◽  
Xin Wang ◽  
Zengtao Xue ◽  
...  
Keyword(s):  
Power Generation ◽  
Control Method ◽  
Unscented Kalman Filter ◽  
Operating Characteristics ◽  
Generation System ◽  
Power Fluctuation ◽  
Battery System ◽  
Photovoltaic Power ◽  
Power Generation System ◽  
Battery Energy

For the intermittent nature of renewable resources (such as wind and solar), smooth power fluctuations are required before the energy conversion system can be injected into the grid. The battery system is a typical smoothing control method for photovoltaic power. The long-term overcharge and overdischarge make the battery energy storage scheme unattractive. In this paper, the output power fluctuation of the photovoltaic power generation system is smoothed based on the unscented Kalman filter (UKF) method combined with the fuel cell operating characteristics. This coordination method affects the UKF situation through the feedback of state of charge (SOC) and the power of the battery system. Not only can it better meet the load characteristics, but it can also make the SOC automatically correct the battery system to prevent overcharge and overdischarge. The meteorological load data was used to verify the superiority of the method.

Vector Control of the BDFG for Ship Shaft Standalone Power Generation System

2014 ◽  
Vol 1008-1009 ◽  
pp. 505-509
Author(s):  
Fei Long ◽  
Hong Da Liu ◽  
Nai Jun Shen ◽  
Jin Jun Yin ◽  
Li Hong Li ◽  
...  
Keyword(s):  
Power Generation ◽  
Vector Control ◽  
Control Method ◽  
Dynamic Performance ◽  
Generation System ◽  
Shaft Power ◽  
Power Generation System ◽  
Stator Flux ◽  
Doubly Fed ◽  
Doubly Fed Generator

The Ship Shaft Power Generation System (SSPGS) is widely used in large and medium-sized container ship, and the SSPGS based on brushless doubly-fed generator (BDFG) has the advantages of smaller capacity of the inverter, lower capital operational costs and higher reliability. The proposed vector control method is developed on the power-winding stator flux frame and can be used to control the power winding voltage amplitude and frequency on the standalone mode. The generator model and the control system are developed in Matlab/Simulink. The results show that the control strategy has good dynamic performance when the ship speed and load are changed.

Multi-Frequency Proportional-Resonant Control for Wave Power Generation System

2013 ◽  
Vol 760-762 ◽  
pp. 1139-1143
Author(s):  
Hong Wei Fang ◽  
Jia Jia Cheng ◽  
Qi Wei Yang ◽  
Jing Lian
Keyword(s):  
Power Generation ◽  
Control Method ◽  
Current Control ◽  
Wave Power ◽  
Generation System ◽  
Type Wave ◽  
Power Generation System ◽  
Resonant Control ◽  
Wave Power Generation

A grid voltage vector oriented proportional resonant (PR) control strategy is applied to the grid current control of the float-type wave power generation system. Compared with the conventional double closed-loop proportional integral (PI) control method, the proposed multi-frequency PR control method can realize zero steady-state error in AC input signal in the stationary frame, without complex coordinate rotation transformation and decoupling control. The overall wave power generation system model is built with Matlab/Simulink to evaluate the performance of the PR control method. Simulation results have shown that the PR control can well improve the robustness and the power quality of the float-type wave energy conversion control system.

Investigation of the control method and power quality of the gas hydrate power generation system

2016 ◽  
Vol 2016.54 (0) ◽  
pp. 131-132
Author(s):  
Daisuke MIKAWA ◽  
Shin'ya OBARA ◽  
Masahito KAWAI ◽  
Masamitsu TAKABATAKE
Keyword(s):  
Power Generation ◽  
Power Quality ◽  
Gas Hydrate ◽  
Control Method ◽  
Generation System ◽  
Power Generation System
Sign in / Sign up

Export Citation Format

Share Document