Equivalent Modelling of Wind Farm Based on Loss Distribution Method

As to the modeling of wind power units, real-time changes caused by the randomness of wind energy will introduce huge calculation amount, which extends the simulation time. In this paper, as to wind farm with radiant network, a simplified equivalent model is put forward through power superposition and loss allocation. This model simplifies multi-unit wind farms into one with parallel connection of a small amount of units under the condition of such known parameters as unit power and line length in the wind farm, which conducts line conversion with the principle of equivalence for internal line loss in the wind farm before and after simplification, and meanwhile meets the stability requirement of active power, transient and steady-state voltage amplitude and waveform at the exit of the wind farm. The simulation result shows that this equivalent model well simulates the internal operation of wind farm, and achieves the expected equivalent effect and has high precision.