The second‐order cone programming method for interval power flow of active distribution network with distributed generation

Abstract

In this paper, a second-order cone programming (CP) method by which one can accurately calculate the interval power flow of an active distribution network with distributed generation is proposed. First, according to the interval models of the distributed wind power and solar power generation, the nonlinear programming (NLP) model for the interval power flow of the active distribution network is established. Second, based on the structure characteristics of the distribution network, the NLP model of the interval power flow is transformed into the standard second-order CP model. Finally, an interior point method with polynomial time complexity is used to solve it. The numerical results obtained by the modified IEEE-33 bus system show that the proposed second-order CP method has better global convergence and a higher computational efficiency than the NLP method, and the interval for the power flow state of the distribution network can be accurately solved.

A new load flow and short‐circuit analysis for unbalanced modern distribution system

“…The details of BCBV mesh T m h i is given in Equation (A7) in Appendix A. Similarly, Equation (13) can also be modified for the meshed distribution network as given in Equation (18).…”

“…This method is only applicable to balanced distribution systems. A second‐order cone programming method for interval power flow of active distribution network with DG is developed in Reference 18. The non‐linear programming model of distribution network considering interval models of solar and wind power is established in this paper.…”

An adaptive voltage‐regulation control strategy of an electric spring based on output current feedback

“…According to (4), sudden changes in |Z eq | will lead to sudden changes in ES reactive power, which will cause influence on the voltage-regulation effect. Taking the 220 V system with resistive noncritical loads as an example, according to the analysis above, (4) will become:…”

“…As the environmental pollution problem and the energy shortage problem are becoming more and more serious, renewable energy generation has become a hot spot in the power system field . Distributed generation (DG), as the main form of renewable energy generation, its output power has a strong volatility due to the intermittent characteristic of renewable energy . The fluctuation of the output power of DG will pose a great threat to the voltage stability of a power system, which may restrict the popularization of DG .…”