园区微电网运行在"以热定电"方式下时,微型燃气轮机电能完全跟随热负荷,限制了微型燃气轮机在经济调度中的作用。针对这一问题,提出一种考虑微电网中央控制器(microgrid central controller,MGCC)信息、微电网运行约束、储能...园区微电网运行在"以热定电"方式下时,微型燃气轮机电能完全跟随热负荷,限制了微型燃气轮机在经济调度中的作用。针对这一问题,提出一种考虑微电网中央控制器(microgrid central controller,MGCC)信息、微电网运行约束、储能约束的"源-网-荷-储"4层模型,解耦了微型燃气轮机电热出力的强耦合性,采用改进的粒子群优化(particle swarm optimization,PSO)算法对模型求解,优化微电网内各单元出力。将该模型应用于某微电网实际算例,并与"以热定电"、"电热分供"2种运行方式进行比较,分析结果表明,该优化模型能够实现"源-网-荷-储"协调调度,降低微电网运行成本。展开更多
计及高比例分布式光伏出力和海量柔性负荷双重高不确定性的“源-网-荷”协调运行是发展新型电力系统亟需解决的难点问题。为此,首先考虑主动负荷的灵活可调节性和需求响应特性,以最小化运行成本为目标建立台区经济自治运行确定性优化模...计及高比例分布式光伏出力和海量柔性负荷双重高不确定性的“源-网-荷”协调运行是发展新型电力系统亟需解决的难点问题。为此,首先考虑主动负荷的灵活可调节性和需求响应特性,以最小化运行成本为目标建立台区经济自治运行确定性优化模型;在此基础上,构造表征源侧和荷侧波动特征的鲁棒多面体不确定集合,构建计及源荷侧双重不确定性的台区经济自治运行不确定性优化模型;随后通过鲁棒对等将其转换为可解耦迭代求解的鲁棒优化模型,采用交替方向乘子算法(alternating direction method of multipliers,ADMM)实现了模型的分布式迭代求解。通过仿真对比实验,得出计及源荷侧双重高不确定性的台区经济运行的分布式优化方法在求解效率上优于集中式优化方法,且其能降低用户用电成本的同时促进分布式光伏消纳。展开更多
Up to now legislation of economical usage of Estonian sea shelf is lacking, what breaks development of wind farms. Therefore it is expedient to look the potential of wind resources and prablems to use it. In this pape...Up to now legislation of economical usage of Estonian sea shelf is lacking, what breaks development of wind farms. Therefore it is expedient to look the potential of wind resources and prablems to use it. In this paper the potential resource of four characteristic offshore regions in Estonia are assessed. Two different approaches have been used to assess the dynamic quality of the wind power, both of which lead to the same result. The dynamic quality of the load of the grid is also assessed since any consumer will be affected by the total influence of both these dynamic processes. These processes do limit the usage of wind power due to peculiarities of the Estonian electrical grid.展开更多
The relation between the implementation time of small reactor and its market was studied if small reactor could be implemented to be utilized as a base load operation. If the small reactors with 100 or 50 MWe could be...The relation between the implementation time of small reactor and its market was studied if small reactor could be implemented to be utilized as a base load operation. If the small reactors with 100 or 50 MWe could be implemented from 2020, the potential countries could be selected from the view point of the estimated total electricity consumption in 2020 and the stability of the electrical grid system. The commercialization of small reactors should be best done early because the market for these power units as a base load operation might be reduced due to the increase of the electricity consumption in the future after 2020. The implementation program of small reactors for the district heating and electricity supply in Mongolia, which is one of the countries having the interests in small reactor, was investigated and the future implementation plan was proposed too. In order to reduce the air pollution by coal fired heating system, there is an urgent need to start the discussion for the utilization of nuclear district heating reactor in Ulaanbaatar.展开更多
文摘园区微电网运行在"以热定电"方式下时,微型燃气轮机电能完全跟随热负荷,限制了微型燃气轮机在经济调度中的作用。针对这一问题,提出一种考虑微电网中央控制器(microgrid central controller,MGCC)信息、微电网运行约束、储能约束的"源-网-荷-储"4层模型,解耦了微型燃气轮机电热出力的强耦合性,采用改进的粒子群优化(particle swarm optimization,PSO)算法对模型求解,优化微电网内各单元出力。将该模型应用于某微电网实际算例,并与"以热定电"、"电热分供"2种运行方式进行比较,分析结果表明,该优化模型能够实现"源-网-荷-储"协调调度,降低微电网运行成本。
文摘计及高比例分布式光伏出力和海量柔性负荷双重高不确定性的“源-网-荷”协调运行是发展新型电力系统亟需解决的难点问题。为此,首先考虑主动负荷的灵活可调节性和需求响应特性,以最小化运行成本为目标建立台区经济自治运行确定性优化模型;在此基础上,构造表征源侧和荷侧波动特征的鲁棒多面体不确定集合,构建计及源荷侧双重不确定性的台区经济自治运行不确定性优化模型;随后通过鲁棒对等将其转换为可解耦迭代求解的鲁棒优化模型,采用交替方向乘子算法(alternating direction method of multipliers,ADMM)实现了模型的分布式迭代求解。通过仿真对比实验,得出计及源荷侧双重高不确定性的台区经济运行的分布式优化方法在求解效率上优于集中式优化方法,且其能降低用户用电成本的同时促进分布式光伏消纳。
基金Acknowledgment The authors thank the Estonian Science Foundation as mediator of the international grant EMP 53
文摘Up to now legislation of economical usage of Estonian sea shelf is lacking, what breaks development of wind farms. Therefore it is expedient to look the potential of wind resources and prablems to use it. In this paper the potential resource of four characteristic offshore regions in Estonia are assessed. Two different approaches have been used to assess the dynamic quality of the wind power, both of which lead to the same result. The dynamic quality of the load of the grid is also assessed since any consumer will be affected by the total influence of both these dynamic processes. These processes do limit the usage of wind power due to peculiarities of the Estonian electrical grid.
文摘The relation between the implementation time of small reactor and its market was studied if small reactor could be implemented to be utilized as a base load operation. If the small reactors with 100 or 50 MWe could be implemented from 2020, the potential countries could be selected from the view point of the estimated total electricity consumption in 2020 and the stability of the electrical grid system. The commercialization of small reactors should be best done early because the market for these power units as a base load operation might be reduced due to the increase of the electricity consumption in the future after 2020. The implementation program of small reactors for the district heating and electricity supply in Mongolia, which is one of the countries having the interests in small reactor, was investigated and the future implementation plan was proposed too. In order to reduce the air pollution by coal fired heating system, there is an urgent need to start the discussion for the utilization of nuclear district heating reactor in Ulaanbaatar.
