The OPF model and algorithm for "source-grid-load" interactive optimal regulation participated with flexible load

Flexible load has increasingly becoming an important means of regulating the power grid and consuming new energy, as well as an important part of "source-grid-load" coordination control. On the other hand, nowadays typical new energy resources such as wind and solar energy are being accessed to the power grid in a large scale, but the phenomenon of abandoning wind or solar energy is very serious since the effect of channel bottlenecks or little load consumption. Aiming at solving this problem, and combining with the possibility of adjusting load flexibly because of the loose electricity price in the new situation of Chinese electric power reform, this paper gives the DC OPF model for the "source-grid-load" interactive optimal regulation based on the traditional OPF model. To be precise, this model puts forward the goal of maximizing the system-wide social net marginal benefit, which is on the basic of any time section with balanced power flow in the system, and considers the marginal cost of the source and network side as well as the net marginal benefit of the load side, to research the optimization operation strategy of the large-scale new energy, conventional power and flexible load. Then linear program algorithm is deduced based on basic mathematics model foundation. The example is simulated under the goal of maximizing the social net marginal benefit with MATLAB/linprog, the results show the effectiveness of the model and algorithm. There is no convergence problems in the model and algorithm presented in this paper. In addition, the compute speed is fast. On the one hand, the scheduling decision can meet the security, economy, reliability and other operational requirements of the power system. On the other hand, the regulation value of the "source-grid-load" interaction which participated with flexible load can be fully reflected. In a word, this paper provides new ideas of OPF for future "relatively independent" power dispatching / trading platform.