# Research on Robust Day-Ahead Dispatch Considering Primary Frequency Response of Wind Turbine
## 1 Introduction
In [23], we locate an adaptive robust method, which uses different scenarios to represent the uncertainty of wind power, and which finds the key scenario with the maximum balance cost to represent the uncertainty information contained in all of the scenarios. Following this, the set of key scenes is considered to find out the day-ahead dispatch strategy. Since the primary reserve capacity of wind power is related to its output, it is indispensable to decide on the nearly real-time primary reserve capacity within the real-time optimization framework, considering the primary frequency response, so as to avoid the influence of a wind power forecasting error. Therefore, not only should we consider the uncertainty balance cost of the wind power during the real time operation of the system, but also the cost of the primary reserve. In summary, this paper proposes an improved adaptive robust optimization model to address the uncertainty of wind power in the case of a large-scale grid connection of wind power. In the two-stage optimization, the unit output and power balance reserve are decided by the day-ahead dispatch, while during the real-time dispatch, after adjusting the unit output, we build up the accurate wind power primary reserve constraint within the real-time optimization framework to coordinate the primary reserve capacity between the wind power and other synchronous generators according to the frequency indexes of the system as the VSG could retain the frequency regulation reserve. The main contributions of this paper are as follows:  
In order to improve the accuracy of the coordination with other synchronous generators in the system and determine the primary reserve capacity of wind power, a more reasonable and effective approach to determine the primary reserve capacity of wind power is proposed on the basis of the fixed reserve capacity mode following the norms of VSG technology as well as the forms of restraints that fit the optimal dispatch framework. Robust optimization is of great significance for solving the uncertainty problem of wind power. In this paper, within the two-stage robust optimization framework, we take into consideration the primary reserve in the real-time operation and propose the day-ahead dispatch strategy targeting the minimum operation cost after coordinating the reserve capacity allocation between the VSG and the conventional generator. Then, we analyze the strategy with the IEEE computational experiment. In the second part of the paper, we analyze the inertial support and primary frequency regulation of the system frequency response before and after the wind power grid connection. In Part 3, a robust optimization dispatch model considering the frequency response is established to coordinate the reserve and dispatch schemes on the day-ahead and real-time scales. The primary reserve is adopted in response to the system frequency fluctuations. Finally, the solution is given. The computational experiment is run in Part 4, during which a modified IEEE 57-node system is used to verify the effectiveness of the proposed algorithm, and the influence of the grid connection of the wind power on the system frequency regulation is analyzed. The fifth part is the conclusions drawn upon the analysis of the computational results.