需求响应作为发电侧与需求侧之间的重要互动资源,能有效调节负荷需求分布来实现节能减排和提高系统风电接纳能力的目的。基于此,将需求响应融入环境经济中,提出一种智能电网下的日前两阶段调度模型:第1阶段为日前用户互动阶段,通过分时...需求响应作为发电侧与需求侧之间的重要互动资源,能有效调节负荷需求分布来实现节能减排和提高系统风电接纳能力的目的。基于此,将需求响应融入环境经济中,提出一种智能电网下的日前两阶段调度模型:第1阶段为日前用户互动阶段,通过分时电价的杠杆作用引导用户理性用电,以调整次日负荷需求分布,综合考虑负荷水平和用户用电满意度确定最优负荷曲线和分时电价;第2阶段为日前调度阶段,针对风电出力随机性,建立基于机会约束规划的环境经济调度模型,采用风电出力分布函数将其转化为确定性模型。将种群多样性指标和随机黑洞理论引入粒子群算法中,结合多目标搜索机制,提出一种改进多目标粒子群算法对模型求解,并采用逼近理想解排序法(technique for order preference by similarity to ideal solution,TOPSIS)对Pareto前沿个体排序,辅助调度人员进行科学决策。改进10机系统的仿真结果验证了该模型及方法的有效性与合理性。展开更多
The economic emission dispatch (EED) problem minimizes two competing objective functions, fuel cost and emission, while satisfying several equality and inequality constraints. Since the availability of wind power (WP)...The economic emission dispatch (EED) problem minimizes two competing objective functions, fuel cost and emission, while satisfying several equality and inequality constraints. Since the availability of wind power (WP) is highly dependent on the weather conditions, the inclusion of a significant amount of WP into EED will result in additional constraints to accommodate the intermittent nature of the output. In this paper, a new correlated bivariate Weibull probability distribution model is proposed to analytically remove the assumption that the total WP is characterized by a single random variable. This probability distribution is used as chance constraint. The inclusion of the probability distribution of stochastic WP in the EED problem is defined as the here-and-now strategy. Non-dominated sorting genetic algorithm built in MATLAB is used to handle the EED problem as a multi-objective optimization problem. A 69-bus ten-unit test system with non-smooth cost function is used to test the effectiveness of the proposed model.展开更多
This paper presents a sequential approach with matrix framework for solving various kinds of economic dispatch problems. The objective of the economic dispatch problems of electrical power generation is to schedule th...This paper presents a sequential approach with matrix framework for solving various kinds of economic dispatch problems. The objective of the economic dispatch problems of electrical power generation is to schedule the committed generating units output so as to meet the required load demand while satisfying the system equality and inequality constraints. This is a maiden approach developed to obtain the optimal dispatches of generating units for all possible load demands of power system in a single execution. The feasibility of the proposed method is demonstrated by solving economic load dispatch problem, combined economic and emission dispatch problem, multiarea economic dispatch problem and economic dispatch problem with multiple fuel options. The proposed methodology is tested with different scale of power systems. The generating unit operational constraints are also considered. The simulation results obtained by proposed methodology for various economic dispatch problems are compared with previous literatures in terms of solution quality. Numerical simulation results indicate an improvement in total cost saving and hence the superiority of the proposed method is also revealed for economic dispatch problems.展开更多
文摘需求响应作为发电侧与需求侧之间的重要互动资源,能有效调节负荷需求分布来实现节能减排和提高系统风电接纳能力的目的。基于此,将需求响应融入环境经济中,提出一种智能电网下的日前两阶段调度模型:第1阶段为日前用户互动阶段,通过分时电价的杠杆作用引导用户理性用电,以调整次日负荷需求分布,综合考虑负荷水平和用户用电满意度确定最优负荷曲线和分时电价;第2阶段为日前调度阶段,针对风电出力随机性,建立基于机会约束规划的环境经济调度模型,采用风电出力分布函数将其转化为确定性模型。将种群多样性指标和随机黑洞理论引入粒子群算法中,结合多目标搜索机制,提出一种改进多目标粒子群算法对模型求解,并采用逼近理想解排序法(technique for order preference by similarity to ideal solution,TOPSIS)对Pareto前沿个体排序,辅助调度人员进行科学决策。改进10机系统的仿真结果验证了该模型及方法的有效性与合理性。
文摘The economic emission dispatch (EED) problem minimizes two competing objective functions, fuel cost and emission, while satisfying several equality and inequality constraints. Since the availability of wind power (WP) is highly dependent on the weather conditions, the inclusion of a significant amount of WP into EED will result in additional constraints to accommodate the intermittent nature of the output. In this paper, a new correlated bivariate Weibull probability distribution model is proposed to analytically remove the assumption that the total WP is characterized by a single random variable. This probability distribution is used as chance constraint. The inclusion of the probability distribution of stochastic WP in the EED problem is defined as the here-and-now strategy. Non-dominated sorting genetic algorithm built in MATLAB is used to handle the EED problem as a multi-objective optimization problem. A 69-bus ten-unit test system with non-smooth cost function is used to test the effectiveness of the proposed model.
文摘This paper presents a sequential approach with matrix framework for solving various kinds of economic dispatch problems. The objective of the economic dispatch problems of electrical power generation is to schedule the committed generating units output so as to meet the required load demand while satisfying the system equality and inequality constraints. This is a maiden approach developed to obtain the optimal dispatches of generating units for all possible load demands of power system in a single execution. The feasibility of the proposed method is demonstrated by solving economic load dispatch problem, combined economic and emission dispatch problem, multiarea economic dispatch problem and economic dispatch problem with multiple fuel options. The proposed methodology is tested with different scale of power systems. The generating unit operational constraints are also considered. The simulation results obtained by proposed methodology for various economic dispatch problems are compared with previous literatures in terms of solution quality. Numerical simulation results indicate an improvement in total cost saving and hence the superiority of the proposed method is also revealed for economic dispatch problems.
