mong the many forms of renewable energy generation, wind power is the most mature. However, the method used to assess the economic value of large grid connected wind farms still needs further study. At present the tra...mong the many forms of renewable energy generation, wind power is the most mature. However, the method used to assess the economic value of large grid connected wind farms still needs further study. At present the traditional method of project economic assessment as widely used in China isolates the wind farm from the whole power system and ignores the influence of reliability on the cost of wind generation; therefore, the evaluation results can not reflect the true economic value of wind power generation. After reviewing the many assessment methods used at home and abroad, this paper uses the Avoided Cost Method as theoretical basis to establish an economic evaluation model for large wind farms including the characteristics of other conventional forms of power generation like thermal power as well as the system load. The generating reliability is also combined into the economic evaluation. The model is used to evaluate China's largest wind farm, Dabancheng Wind Farm in Xinjiang.展开更多
Based on the port-controlled dissipative Hamiltonian(PCDH)system,a novel nonlinear(NN)H∞control is designed for the wind farm side(WFS)voltage source converter(VSC)of VSC-based high-voltage direct current(VSC-HVDC)tr...Based on the port-controlled dissipative Hamiltonian(PCDH)system,a novel nonlinear(NN)H∞control is designed for the wind farm side(WFS)voltage source converter(VSC)of VSC-based high-voltage direct current(VSC-HVDC)transmission system connected large wind farm.Firstly,the uncertain nonlinear dynamical model of WFS VSC in the VSC-HVDC is established by taking external disturbances and parameter variations into account.Then,the dissipative Hamiltonian structure of the WFS VSC system is constructed by means of variable transformation.Thirdly,on the basis of the obtained dissipative Hamiltonian structure,a NN H∞control is put forward.Finally,the simulation results show that the proposed NN H∞control gains the advantage over the interconnection and damping assignment passivity-based(IDA-PB)control.展开更多
文摘mong the many forms of renewable energy generation, wind power is the most mature. However, the method used to assess the economic value of large grid connected wind farms still needs further study. At present the traditional method of project economic assessment as widely used in China isolates the wind farm from the whole power system and ignores the influence of reliability on the cost of wind generation; therefore, the evaluation results can not reflect the true economic value of wind power generation. After reviewing the many assessment methods used at home and abroad, this paper uses the Avoided Cost Method as theoretical basis to establish an economic evaluation model for large wind farms including the characteristics of other conventional forms of power generation like thermal power as well as the system load. The generating reliability is also combined into the economic evaluation. The model is used to evaluate China's largest wind farm, Dabancheng Wind Farm in Xinjiang.
基金supported by Guizhou Provincial Science and Technology Foundation[Grant numbers QiankeheJzi[2015]2070,Qiankehejichu[2016]1064,Qiankehejichu[2017]1074,Qiankehejichu[2018]1068,Qiankehezhicheng[2018]2164]the Chinese National Natural Science Foundation[grant number 61563011]+1 种基金the Ph.D research fund of Guizhou Normal University[grant number 11904-0514170]High level talent research project of Guizhou Institute of Technology[grant number XJGC20150405].
文摘Based on the port-controlled dissipative Hamiltonian(PCDH)system,a novel nonlinear(NN)H∞control is designed for the wind farm side(WFS)voltage source converter(VSC)of VSC-based high-voltage direct current(VSC-HVDC)transmission system connected large wind farm.Firstly,the uncertain nonlinear dynamical model of WFS VSC in the VSC-HVDC is established by taking external disturbances and parameter variations into account.Then,the dissipative Hamiltonian structure of the WFS VSC system is constructed by means of variable transformation.Thirdly,on the basis of the obtained dissipative Hamiltonian structure,a NN H∞control is put forward.Finally,the simulation results show that the proposed NN H∞control gains the advantage over the interconnection and damping assignment passivity-based(IDA-PB)control.
