scholarly journals Research on a New Control Scheme of Photovoltaic Grid Power Generation System

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Dong-Hui Li ◽  
Yi-Lin Wang ◽  
Da-jun Zhou
Keyword(s):  
Power Generation ◽  
Fundamental Wave ◽  
System Control ◽  
Generation System ◽  
Control Scheme ◽  
Simulation And Experiment ◽  
Power Generation System ◽  
Observation Method ◽  
Nondetection Zone ◽  
Power Generation Systems

A new type of photovoltaic grid power generation system control scheme to solve the problems of the conventional photovoltaic grid power generation systems is presented. To aim at the oscillation and misjudgment of traditional perturbation observation method, an improved perturbation observation method comparing to the next moment power is proposed, combining with BOOST step-up circuit to realize the maximum power tracking. To counter the harmonic pollution problem in photovoltaic grid power generation system, the deadbeat control scheme in fundamental wave synchronous frequency rotating coordinate system of power grid is presented. A parameter optimization scheme based on positive feedback of active frequency shift island detection to solve the problems like the nondetection zone due to the import of disturbance in traditional island detection method is proposed. Finally, the results in simulation environment by MATLAB/Simulink simulation and experiment environment verify the validity and superiority of the proposed scheme.

scholarly journals Development of a Low-NOx LBG Combustor for Coal Gasification Combined Cycle Power Generation Systems

1989 ◽  
Author(s):  
M. Sato ◽  
T. Abe ◽  
T. Ninomiya ◽  
T. Nakata ◽  
T. Yoshine ◽  
...  
Keyword(s):  
Power Generation ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Coal Gasification ◽  
Combined Cycle ◽  
Generation System ◽  
Combustion Technology ◽  
Power Generation System ◽  
Combustion Tests ◽  
Power Generation Systems

From the view point of future coal utilization technology for the thermal power generation systems, the coal gasification combined cycle system has drawn special interest recently. In the coal gasification combined cycle power generation system, it is necessary to develop a high temperature gas turbine combustor using a low-BTU gas (LBG) which has high thermal efficiency and low emissions. In Japan a development program of the coal gasification combined cycle power generation system has started in 1985 by the national government and Japanese electric companies. In this program, 1300°C class gas turbines will be developed. If the fuel gas cleaning system is a hot type, the coal gaseous fuel to be supplied to gas turbines will contain ammonia. Ammonia will be converted to nitric oxides in the combustion process in gas turbines. Therefore, low fuel-NOx combustion technology will be one of the most important research subjects. This paper describes low fuel-NOx combustion technology for 1300°C class gas turbine combustors using coal gaseous low-BTU fuel as well as combustion characteristics and carbon monoxide emission characteristics. Combustion tests were conducted using a full-scale combustor used for the 150 MW gas turbine at the atmospheric pressure. Furthermore, high pressure combustion tests were conducted using a half-scale combustor used for the 1 50 MW gas turbine.

Preliminary Research of a Zero CO2 Emission Power Generation System

2010 ◽  
Author(s):  
Jing-yu Ran ◽  
Chang-lei Qin
Keyword(s):  
Power Generation ◽  
Co2 Emission ◽  
Generation System ◽  
Emission Power ◽  
Generation Efficiency ◽  
Technical Problems ◽  
The Earth ◽  
Emission System ◽  
Power Generation System ◽  
Power Generation Systems

CO2 is a main greenhouse gas fazing the Earth. So countries around the world are actively studying the methods of capturing CO2 to reduce emission. In this paper, firstly a brief review was carried out on the research development and technical problems of three typical near-zero CO2 emission power generation systems. Focus was made on the construction of one possible commercially applied zero emission system, which has new principle but relatively conservative sections. Preliminary analysis and calculation of energy and mass flow have been finished to evaluate its performance. The results showed that apart from zero CO2 emission, a relatively tempting efficiency could be sustained. Theoretically, higher than 90% purity of CO2 and 63% generation efficiency of the whole system can be achieved.

Research and Simulation on the Maximum Power Tracking Control of the Wind-Light Complementary Power Generation System

2013 ◽  
Vol 684 ◽  
pp. 451-455
Author(s):  
Gang Wang
Keyword(s):  
Power Generation ◽  
Tracking Control ◽  
Maximum Power ◽  
Utilization Efficiency ◽  
Generation System ◽  
Maximum Power Point ◽  
Power Generation System ◽  
Low Efficiency ◽  
Power Point ◽  
Observation Method

In view of the present problem in low efficiency of the wind-light complementary power generation system, the tracking control strategy on the system maximum power point was proposed based on the perturbation and observation method, and overall structure of wind-light complementary power generation system is introduced. The simulation study on the system maximum power control was carried out based on the MATLAB/ SIMULINK, and the results of simulation showed that the tracking control of the system maximum power point was able to be achieved and the utilization efficiency of the system energy was also improved.

Synergetic Utilization of Coal and Industrial Waste Heat in Power Generation System

2013 ◽  
Vol 724-725 ◽  
pp. 990-998
Author(s):  
Zhen Chen ◽  
Wei Dou Ni
Keyword(s):  
Power Generation ◽  
Industrial Waste ◽  
Waste Heat ◽  
Generation System ◽  
Coal Consumption ◽  
Power Generation System ◽  
Industrial Waste Heat ◽  
Synergetic System ◽  
Power Generation Systems ◽  
Heating Mode

Coal and industrial waste heat synergetic utilization power generation system (the synergetic system) is proposed according to the energy cascade utilization principle. The industrial waste heat is used for feedwater heating of coal-fired power generation system to substitute steam extraction from steam turbine. The thermal performance of stand-alone waste heat power generation, stand-alone coal-fired power generation, and synergetic systems were studied, to compare the power generation capability of each system using heat balance method. The results show that the power generation capability of synergetic power generation system is larger than that of the two stand-alone systems. The equivalent and same grade waste heat synergized with higher-parameter, larger-capacity coal-fired power generation systems can generate more electricity than with the low-parameter ones; the high-parameter waste heat synergized with the higher-parameter and larger-capacity power generation systems can reach larger power generation capability. The multi-energy synergetic heating mode can greatly improve the comprehensive energy efficiency and reduce the coal consumption compared with the stand-alone energy heating mode.

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