Aiming at the problems of power structure irrationality, lagging of power network behind power source development and high proportion of overdone and small sized units existing currently in power system in China, fina...Aiming at the problems of power structure irrationality, lagging of power network behind power source development and high proportion of overdone and small sized units existing currently in power system in China, financial and running strategies are set forth corresponding to power system restructuring.展开更多
In the last two decades,the wind power generation has been rapidly and widely developed in many regions and countries for tackling the problems of environmental pollution and sustainability of energy supply.However,th...In the last two decades,the wind power generation has been rapidly and widely developed in many regions and countries for tackling the problems of environmental pollution and sustainability of energy supply.However,the high share of intermittent and fluctuating wind power production has also increased the burden of system operator for securing power system reliability during the operational phase.Moreover,the power system restructuring and deregulation have not only introduced the competition for reducing cost but also changed the strategy of reliability evaluation and management of power systems.The conventional long-term reliability evaluation techniques have been well developed,which have been more focused on planning and expansion rather than operation of power systems.This paper proposes a new technique for evaluating operational reliabilities of restructured power systems with high wind power penetration.The proposed technique is based on the combination of the reliability network equivalent and time-sequential simulation approaches.The operational reliability network equivalents are developed to represent reliability models of wind farms,conventional generation and reserve provides,fast reserve providers and transmission network in restructured power systems.A contingency management schema for real time operation considering its coupling with the dayahead market is proposed.The time-sequential Monte Carlo simulation is used to model the chronological characteristics of corresponding reliability network equivalents.Asimplified method is also developed in the simulation procedures for improving the computational efficiency.The proposed technique can be used to evaluate customers’reliabilities considering high penetration of wind power during the power system operation in the deregulated environment.展开更多
文摘Aiming at the problems of power structure irrationality, lagging of power network behind power source development and high proportion of overdone and small sized units existing currently in power system in China, financial and running strategies are set forth corresponding to power system restructuring.
基金This work was supported by Chinese National Natural Science Funds under Grant 51177078.
文摘In the last two decades,the wind power generation has been rapidly and widely developed in many regions and countries for tackling the problems of environmental pollution and sustainability of energy supply.However,the high share of intermittent and fluctuating wind power production has also increased the burden of system operator for securing power system reliability during the operational phase.Moreover,the power system restructuring and deregulation have not only introduced the competition for reducing cost but also changed the strategy of reliability evaluation and management of power systems.The conventional long-term reliability evaluation techniques have been well developed,which have been more focused on planning and expansion rather than operation of power systems.This paper proposes a new technique for evaluating operational reliabilities of restructured power systems with high wind power penetration.The proposed technique is based on the combination of the reliability network equivalent and time-sequential simulation approaches.The operational reliability network equivalents are developed to represent reliability models of wind farms,conventional generation and reserve provides,fast reserve providers and transmission network in restructured power systems.A contingency management schema for real time operation considering its coupling with the dayahead market is proposed.The time-sequential Monte Carlo simulation is used to model the chronological characteristics of corresponding reliability network equivalents.Asimplified method is also developed in the simulation procedures for improving the computational efficiency.The proposed technique can be used to evaluate customers’reliabilities considering high penetration of wind power during the power system operation in the deregulated environment.
