IEEE PES 2006年度学术会议和国际大电网会议(CIGRE)2006基本上代表了当今电力技术的最高水平和最新研究方向,其论文集对我国电力系统运行和科研工作有较高的参考价值。本文对上述2个会议的论文集进行了综述,主要内容包括动态安全评估...IEEE PES 2006年度学术会议和国际大电网会议(CIGRE)2006基本上代表了当今电力技术的最高水平和最新研究方向,其论文集对我国电力系统运行和科研工作有较高的参考价值。本文对上述2个会议的论文集进行了综述,主要内容包括动态安全评估、广域量测系统、广域控制系统、系统恢复等方面的研究现状介绍与经验总结。最后结合我国电力系统调度自动化方面的实际情况提出了一些建议。展开更多
Two-level system model based probabilistic steady-state and dynamic security assessment model is introduced in this paper.Uncertainties of nodal power injection caused by wind power and load demand,steady-state and dy...Two-level system model based probabilistic steady-state and dynamic security assessment model is introduced in this paper.Uncertainties of nodal power injection caused by wind power and load demand,steady-state and dynamic security constraints and transitions between system configurations in terms of failure rate and repair rate are considered in the model.Time to insecurity is used as security index.The probability distribution of time to insecurity can be obtained by solving a linear vector differential equation.The coefficients of the differential equation are expressed in terms of configuration transition rates and security transition probabilities.The model is implemented in complex system successfully for the first time by using the following effective measures:firstly,calculating configuration transition rates effectively based on component state transition rate matrix and system configuration array;secondly,calculating the probability of random nodal power injection belonging to security region effectively according to practical parts of critical boundaries of security region represented by hyper-planes;thirdly,locating non-zero elements of coefficient matrix and then implementing sparse storage of coefficient matrix effectively;finally,calculating security region off-line for on-line use.Results of probabilistic security assessment can be used to conduct operators to analyze system security effectively and take preventive control.Test results on New England 10-generators and 39-buses power system verify the reasonableness and effectiveness of the method.展开更多
文摘IEEE PES 2006年度学术会议和国际大电网会议(CIGRE)2006基本上代表了当今电力技术的最高水平和最新研究方向,其论文集对我国电力系统运行和科研工作有较高的参考价值。本文对上述2个会议的论文集进行了综述,主要内容包括动态安全评估、广域量测系统、广域控制系统、系统恢复等方面的研究现状介绍与经验总结。最后结合我国电力系统调度自动化方面的实际情况提出了一些建议。
文摘Two-level system model based probabilistic steady-state and dynamic security assessment model is introduced in this paper.Uncertainties of nodal power injection caused by wind power and load demand,steady-state and dynamic security constraints and transitions between system configurations in terms of failure rate and repair rate are considered in the model.Time to insecurity is used as security index.The probability distribution of time to insecurity can be obtained by solving a linear vector differential equation.The coefficients of the differential equation are expressed in terms of configuration transition rates and security transition probabilities.The model is implemented in complex system successfully for the first time by using the following effective measures:firstly,calculating configuration transition rates effectively based on component state transition rate matrix and system configuration array;secondly,calculating the probability of random nodal power injection belonging to security region effectively according to practical parts of critical boundaries of security region represented by hyper-planes;thirdly,locating non-zero elements of coefficient matrix and then implementing sparse storage of coefficient matrix effectively;finally,calculating security region off-line for on-line use.Results of probabilistic security assessment can be used to conduct operators to analyze system security effectively and take preventive control.Test results on New England 10-generators and 39-buses power system verify the reasonableness and effectiveness of the method.
