Power Flow Analysis Based on the Secant Method in the Environment of the Offshore Wind Farm

Abstract

China’s current exploration of the development for the offshore wind resources is three times than for the onshore wind resources. The development and utilization of offshore wind resources have a broad prospect. In this study, a set of simplified asynchronous generators equivalent to a steady-state model applied in bus test systems is established according to the characteristics of offshore wind turbines. The calculation of the Newton-Raphson method in power flow analysis is relatively large to avoid the occurrence of a Jacobian matrix and reduce the calculation time. In this particular use of the idea of the secant method, the differential equation into the algebraic equation significantly reduced the amount of calculation but also overcame the Newton-Raphson method of sensitivity to the initial value problems. The solution of the equation is simplified, and the purpose of solving the equation is achieved more accurately, while the computation time is similar to the PQ decoupling analysis method.