为应对弃风现象及风电出力的不确定性问题,考虑热网传输延迟特性对应的储能特性,提出一种电热综合能源系统(integrated electricity and district heating system,IEDHS)的鲁棒区间优化调度模型。首先,对热网的物理结构及传输延迟、温...为应对弃风现象及风电出力的不确定性问题,考虑热网传输延迟特性对应的储能特性,提出一种电热综合能源系统(integrated electricity and district heating system,IEDHS)的鲁棒区间优化调度模型。首先,对热网的物理结构及传输延迟、温度损耗特性进行建模,并参与IEDHS优化调度;其次,以区间形式考虑风电的不确定性,使系统在所有风电出力允许区间内,均满足运行约束条件;再次,建立了一种考虑热网传输延迟的IEDHS鲁棒区间优化调度模型,采用对偶理论将原模型进一步转化为单层模型,并调用CPLEX求解器进行求解;最后,通过对PJM-5节点测试系统与6节点热力系统、IEEE-39节点测试系统与12节点热力系统组成的IEDHS进行算例分析,验证了所提模型的有效性。算例结果表明,热网的传输延迟可提高风电利用率,降低系统运行成本,鲁棒区间优化调度结果较常规调度更具可靠性。展开更多
为充分挖掘综合能源微网(integrated energy microgrid, IEM)的潜在价值,促进可再生能源消纳,针对同一配电网下的多个IEM协同管理问题进行研究,提出了一种基于双层博弈的配电网-多IEM协同优化模型。对于IEM模型的构建,考虑在热电联产机...为充分挖掘综合能源微网(integrated energy microgrid, IEM)的潜在价值,促进可再生能源消纳,针对同一配电网下的多个IEM协同管理问题进行研究,提出了一种基于双层博弈的配电网-多IEM协同优化模型。对于IEM模型的构建,考虑在热电联产机组中加入碳捕集系统以及电转气装置,用来获取低碳效益。同时,针对IEM中可再生能源与负荷不确定性问题,采用鲁棒区间规划进行处理。首先,构建配电网运营商(distribution system operator,DSO)与IEM联盟系统模型框架,分析其不同主体间的博弈关系。其次,对于双层博弈,分为主从博弈与合作博弈。DSO作为博弈领导者,以自身效益最大为目标制定电价引导IEM联盟响应。IEM联盟作为博弈跟随者,以自身运行成本最小为目标,通过成员间互相合作能源共享响应DSO的决策。同时采用纳什谈判理论解决IEM联盟的合作运行问题,使用二分法与交替方向乘子法结合求解模型。最后,在算例中验证所提模型与方法的可行性和有效性。展开更多
In this paper, a new stability criterion for positive-coefficient polynomial is given. Then the problem about the robust stability for an interval-polynomial is investigated and some new stability criterions for inter...In this paper, a new stability criterion for positive-coefficient polynomial is given. Then the problem about the robust stability for an interval-polynomial is investigated and some new stability criterions for interval-polynomials are obtained. The coefficient perturbation bound for stable interval polynomial can be completely determined by the coefficients of polynomial (1.1). So the conclusions of this paper are simple and useful. Several examples in the end of this paper show that the criterions given in this paper are effective.展开更多
This paper deals with the robust stability analysis of dynamic systems with interval time- varying delay and uncertainties. The innovation of the method includes employment of a tighter integral inequality and constru...This paper deals with the robust stability analysis of dynamic systems with interval time- varying delay and uncertainties. The innovation of the method includes employment of a tighter integral inequality and construction of an appropriate type of Lyapunov functional. The stability criteria derived from this method have less conservatism than some existing ones. Numerical examples are given to illustrate the effectiveness of the orooosed method.展开更多
文摘为应对弃风现象及风电出力的不确定性问题,考虑热网传输延迟特性对应的储能特性,提出一种电热综合能源系统(integrated electricity and district heating system,IEDHS)的鲁棒区间优化调度模型。首先,对热网的物理结构及传输延迟、温度损耗特性进行建模,并参与IEDHS优化调度;其次,以区间形式考虑风电的不确定性,使系统在所有风电出力允许区间内,均满足运行约束条件;再次,建立了一种考虑热网传输延迟的IEDHS鲁棒区间优化调度模型,采用对偶理论将原模型进一步转化为单层模型,并调用CPLEX求解器进行求解;最后,通过对PJM-5节点测试系统与6节点热力系统、IEEE-39节点测试系统与12节点热力系统组成的IEDHS进行算例分析,验证了所提模型的有效性。算例结果表明,热网的传输延迟可提高风电利用率,降低系统运行成本,鲁棒区间优化调度结果较常规调度更具可靠性。
文摘为充分挖掘综合能源微网(integrated energy microgrid, IEM)的潜在价值,促进可再生能源消纳,针对同一配电网下的多个IEM协同管理问题进行研究,提出了一种基于双层博弈的配电网-多IEM协同优化模型。对于IEM模型的构建,考虑在热电联产机组中加入碳捕集系统以及电转气装置,用来获取低碳效益。同时,针对IEM中可再生能源与负荷不确定性问题,采用鲁棒区间规划进行处理。首先,构建配电网运营商(distribution system operator,DSO)与IEM联盟系统模型框架,分析其不同主体间的博弈关系。其次,对于双层博弈,分为主从博弈与合作博弈。DSO作为博弈领导者,以自身效益最大为目标制定电价引导IEM联盟响应。IEM联盟作为博弈跟随者,以自身运行成本最小为目标,通过成员间互相合作能源共享响应DSO的决策。同时采用纳什谈判理论解决IEM联盟的合作运行问题,使用二分法与交替方向乘子法结合求解模型。最后,在算例中验证所提模型与方法的可行性和有效性。
基金Supported by the Fund of China Education Ministry.
文摘In this paper, a new stability criterion for positive-coefficient polynomial is given. Then the problem about the robust stability for an interval-polynomial is investigated and some new stability criterions for interval-polynomials are obtained. The coefficient perturbation bound for stable interval polynomial can be completely determined by the coefficients of polynomial (1.1). So the conclusions of this paper are simple and useful. Several examples in the end of this paper show that the criterions given in this paper are effective.
基金supported by National Nature Science Foundation of China under Grant Nos.60174032,61004019the Key Project of Science&Technology Commission of Shanghai under Grant No.10JC140500
文摘This paper deals with the robust stability analysis of dynamic systems with interval time- varying delay and uncertainties. The innovation of the method includes employment of a tighter integral inequality and construction of an appropriate type of Lyapunov functional. The stability criteria derived from this method have less conservatism than some existing ones. Numerical examples are given to illustrate the effectiveness of the orooosed method.