Based on the Decomposition-Coordination principle, a hierarchical optimization algorithm is put forward for predictive control of bilinear systems. Time consuming is an usual problem of hierarchieal optimization algor...Based on the Decomposition-Coordination principle, a hierarchical optimization algorithm is put forward for predictive control of bilinear systems. Time consuming is an usual problem of hierarchieal optimization algorithms, this paper tries to improve the online computational efficiency by taking the advantage of the characteristics of bilinear system itself. The effectiveness is shown by the simulation results.展开更多
Under the background of energy conservation, the grid companies should give priority to consumptive hydropower, wind power and other clean electricity to fulfill their social responsibility and promote the carbon emis...Under the background of energy conservation, the grid companies should give priority to consumptive hydropower, wind power and other clean electricity to fulfill their social responsibility and promote the carbon emission reduction in power industry. But under the current power purchase mode, grid companies must first perform the contract. This is extremely uneconomical and not environmentally friendly. Based on hedging theory, this paper proposes a power purchase optimization model using the strategy of “compression and compensation”. If outer price is lower than the contract price, the grid can compress contract power appropriately, leaving more space for purchasing electricity;if outer price is not attractive enough, the grid should timely improve contract proportion, compensating the deviations of contract caused by "compression". Based on the strategy of "compression and compensation", it can effectively reduce the abandoned wind and water, enhance the economic and social benefits of provincial power grid.展开更多
Distributed optimal power flow(OPF)of large-scale multi-area interconnected power systems is a challenging problem.This letter proposes a distributed OPF approach based on the modified decomposition-coordination inter...Distributed optimal power flow(OPF)of large-scale multi-area interconnected power systems is a challenging problem.This letter proposes a distributed OPF approach based on the modified decomposition-coordination interior point method(DCIPM).The proposed method eliminates the zero rows of the coupling matrix and partially factorizes the augmented Newton matrix on the foundation of DCIPM,which speeds up the computation.Eliminating zero rows significantly reduces the size of the coupling matrix,and the partial decomposition of the augmented Newton matrix exploits the sparsity of the coupling matrix.The proposed distributed OPF approach is more convergent and efficient than the traditional distributed optimization methods and faster than the centralized MATPOWER,as verified in different systems,the largest of which contains 70,000 buses.展开更多
文摘Based on the Decomposition-Coordination principle, a hierarchical optimization algorithm is put forward for predictive control of bilinear systems. Time consuming is an usual problem of hierarchieal optimization algorithms, this paper tries to improve the online computational efficiency by taking the advantage of the characteristics of bilinear system itself. The effectiveness is shown by the simulation results.
文摘Under the background of energy conservation, the grid companies should give priority to consumptive hydropower, wind power and other clean electricity to fulfill their social responsibility and promote the carbon emission reduction in power industry. But under the current power purchase mode, grid companies must first perform the contract. This is extremely uneconomical and not environmentally friendly. Based on hedging theory, this paper proposes a power purchase optimization model using the strategy of “compression and compensation”. If outer price is lower than the contract price, the grid can compress contract power appropriately, leaving more space for purchasing electricity;if outer price is not attractive enough, the grid should timely improve contract proportion, compensating the deviations of contract caused by "compression". Based on the strategy of "compression and compensation", it can effectively reduce the abandoned wind and water, enhance the economic and social benefits of provincial power grid.
基金supported by the National Natural Science Foundation of China under Grant 52177087.
文摘Distributed optimal power flow(OPF)of large-scale multi-area interconnected power systems is a challenging problem.This letter proposes a distributed OPF approach based on the modified decomposition-coordination interior point method(DCIPM).The proposed method eliminates the zero rows of the coupling matrix and partially factorizes the augmented Newton matrix on the foundation of DCIPM,which speeds up the computation.Eliminating zero rows significantly reduces the size of the coupling matrix,and the partial decomposition of the augmented Newton matrix exploits the sparsity of the coupling matrix.The proposed distributed OPF approach is more convergent and efficient than the traditional distributed optimization methods and faster than the centralized MATPOWER,as verified in different systems,the largest of which contains 70,000 buses.
