In order to form an algorithm for distribution network routing,an automatic routing method of distribution network planning was proposed based on the shortest path.The problem of automatic routing was divided into two...In order to form an algorithm for distribution network routing,an automatic routing method of distribution network planning was proposed based on the shortest path.The problem of automatic routing was divided into two steps in the method:the first step was that the shortest paths along streets between substation and load points were found by the basic ant colony algorithm to form a preliminary radial distribution network,and the second step was that the result of the shortest path was used to initialize pheromone concentration and pheromone updating rules to generate globally optimal distribution network.Cases studies show that the proposed method is effective and can meet the planning requirements.It is verified that the proposed method has better solution and utility than planning method based on the ant colony algorithm.展开更多
针对电网波动性导致输电网规划经济性降低的背景,基于两类需求响应用户自身运行特性和目标,以分时电价的激励形式,建立了考虑空间差异性的双层输电网扩展规划模型。上层以线路规划成本和需求响应成本之和最小为目标,建立了混合整数线性...针对电网波动性导致输电网规划经济性降低的背景,基于两类需求响应用户自身运行特性和目标,以分时电价的激励形式,建立了考虑空间差异性的双层输电网扩展规划模型。上层以线路规划成本和需求响应成本之和最小为目标,建立了混合整数线性规划(mixed integer linear program,MILP)的输电网扩展规划模型,下层考虑电采暖用户和大工业用户的差异化运行约束,建立了以用电费用最小为目标的需求响应模型。根据库恩-塔克(KKT)条件将下层模型转换为上层模型的约束条件,采用Big-M法对非线性问题线性化。最后,基于IEEE 24节点仿真系统分析验证所提双层规划模型的有效性。最终决策出的电价方案可以体现需求响应资源的空间差异化价值,有效降低电网规划的成本,实现电网和参与需求响应用户的互利共赢。展开更多
随着新型电力系统的建设,用户对于供电可靠性的需求日益升高,而各类开关作为配电网自愈过程的主要执行设备,其优化配置对于提高系统可靠性起到关键作用。新型柔性软开关(soft open point,SOP)具有远程控制与电压支撑的特点,可替代传统...随着新型电力系统的建设,用户对于供电可靠性的需求日益升高,而各类开关作为配电网自愈过程的主要执行设备,其优化配置对于提高系统可靠性起到关键作用。新型柔性软开关(soft open point,SOP)具有远程控制与电压支撑的特点,可替代传统配电网中的联络开关,实现各馈线之间的柔性互联,为改善配电网可靠性提供了新的思路。为此,该文提出一种显式集成可靠性表达式的柔性配电网多类型开关优化配置模型,对配电网自愈过程不同阶段中柔性开关与其他智能开关的动作耦合关系进行精细化建模,建立不同开关类型与系统可靠性指标之间的显式解析关系,从而得到最优的多类型开关配置方案。最后,在配电网算例中对该模型进行测试,验证模型的正确性和有效性。展开更多
基金Project(2009CB219703) supported by the National Basic Research Program of ChinaProject(2011AA05A117) supported by the National High Technology Research and Development Program of China
文摘In order to form an algorithm for distribution network routing,an automatic routing method of distribution network planning was proposed based on the shortest path.The problem of automatic routing was divided into two steps in the method:the first step was that the shortest paths along streets between substation and load points were found by the basic ant colony algorithm to form a preliminary radial distribution network,and the second step was that the result of the shortest path was used to initialize pheromone concentration and pheromone updating rules to generate globally optimal distribution network.Cases studies show that the proposed method is effective and can meet the planning requirements.It is verified that the proposed method has better solution and utility than planning method based on the ant colony algorithm.
文摘针对电网波动性导致输电网规划经济性降低的背景,基于两类需求响应用户自身运行特性和目标,以分时电价的激励形式,建立了考虑空间差异性的双层输电网扩展规划模型。上层以线路规划成本和需求响应成本之和最小为目标,建立了混合整数线性规划(mixed integer linear program,MILP)的输电网扩展规划模型,下层考虑电采暖用户和大工业用户的差异化运行约束,建立了以用电费用最小为目标的需求响应模型。根据库恩-塔克(KKT)条件将下层模型转换为上层模型的约束条件,采用Big-M法对非线性问题线性化。最后,基于IEEE 24节点仿真系统分析验证所提双层规划模型的有效性。最终决策出的电价方案可以体现需求响应资源的空间差异化价值,有效降低电网规划的成本,实现电网和参与需求响应用户的互利共赢。
文摘随着新型电力系统的建设,用户对于供电可靠性的需求日益升高,而各类开关作为配电网自愈过程的主要执行设备,其优化配置对于提高系统可靠性起到关键作用。新型柔性软开关(soft open point,SOP)具有远程控制与电压支撑的特点,可替代传统配电网中的联络开关,实现各馈线之间的柔性互联,为改善配电网可靠性提供了新的思路。为此,该文提出一种显式集成可靠性表达式的柔性配电网多类型开关优化配置模型,对配电网自愈过程不同阶段中柔性开关与其他智能开关的动作耦合关系进行精细化建模,建立不同开关类型与系统可靠性指标之间的显式解析关系,从而得到最优的多类型开关配置方案。最后,在配电网算例中对该模型进行测试,验证模型的正确性和有效性。
