Concerning the integration of large-scale wind power,an integrated model of generation and transmission expansion planning is proposed based on the assessment of the value of steady state and dynamic security.In the a...Concerning the integration of large-scale wind power,an integrated model of generation and transmission expansion planning is proposed based on the assessment of the value of steady state and dynamic security.In the assessment of security value,the unit commitment simulation based on the predicted hourly load and wind power output data in the planning horizon is used to evaluate the costs of preventive control,emergency control and social losses due to the uncertainty of load and wind power.The cost of preventive control consists of the fuel cost of power generation,the environmental cost and the load shedding cost.This not only provides a systematic method of security assessment of power system expansion planning schemes,but also broadens the perspective of power system planning from the technology and economic assessment to the measure of the whole social value.In the assessment process,the preventive control and emergency control of cascading failures are also presented,which provides a convincing tool for cascading failure analysis of planning schemes and makes the security assessment more comprehensive and reasonable.The proposed model and method have been demonstrated by the assessment of two power system planning schemes on the New England 10-genarator 39-bus System.The importance of considering the value of security and simulating hourly system operation for the planning horizon,in expansion planning of power system with integration of large-scale wind power,has been confirmed.展开更多
The social security fund investment operations of the social security system of a country or even the whole economy has a very important role in recent years, although China＇s social security fund management has made...The social security fund investment operations of the social security system of a country or even the whole economy has a very important role in recent years, although China＇s social security fund management has made great progress, but China＇s social security fund investment operations in increasing the value of the pursuit of this goal, while also facing tremendous pressure. After years of practice of reform, China＇s old-age, unemployment and medical insurance and minimum living focused on the social security system has taken shape, but also the corresponding social security fund was established. Part of the problems of social security funds and other investment operations are increasingly apparent. How to achieve the social security fund is necessary to ensure payment, but also realize the accumulation, it is necessary to increase the value, but also to avoid risks, it has become an urgent task of China＇s reform and development. Social Security Fund Investment Management became the central task of the Social Security System.展开更多
文摘Concerning the integration of large-scale wind power,an integrated model of generation and transmission expansion planning is proposed based on the assessment of the value of steady state and dynamic security.In the assessment of security value,the unit commitment simulation based on the predicted hourly load and wind power output data in the planning horizon is used to evaluate the costs of preventive control,emergency control and social losses due to the uncertainty of load and wind power.The cost of preventive control consists of the fuel cost of power generation,the environmental cost and the load shedding cost.This not only provides a systematic method of security assessment of power system expansion planning schemes,but also broadens the perspective of power system planning from the technology and economic assessment to the measure of the whole social value.In the assessment process,the preventive control and emergency control of cascading failures are also presented,which provides a convincing tool for cascading failure analysis of planning schemes and makes the security assessment more comprehensive and reasonable.The proposed model and method have been demonstrated by the assessment of two power system planning schemes on the New England 10-genarator 39-bus System.The importance of considering the value of security and simulating hourly system operation for the planning horizon,in expansion planning of power system with integration of large-scale wind power,has been confirmed.
文摘The social security fund investment operations of the social security system of a country or even the whole economy has a very important role in recent years, although China＇s social security fund management has made great progress, but China＇s social security fund investment operations in increasing the value of the pursuit of this goal, while also facing tremendous pressure. After years of practice of reform, China＇s old-age, unemployment and medical insurance and minimum living focused on the social security system has taken shape, but also the corresponding social security fund was established. Part of the problems of social security funds and other investment operations are increasingly apparent. How to achieve the social security fund is necessary to ensure payment, but also realize the accumulation, it is necessary to increase the value, but also to avoid risks, it has become an urgent task of China＇s reform and development. Social Security Fund Investment Management became the central task of the Social Security System.
