The Study Of Practical Spinning Reserve Allocation Problem In The Wind Power Integrated Power System

In recent years, with the increasing of the wind turbine installed capacity and the wind farm, wind power has become an important power source of the system. However, with the intermittent and randomness of wind power, the power system needs to arrange certain spinning reserve capacity in response to wind power fluctuations and the optimal allocation of spinning reserve problem is the key. However, with the rapid development of modern power grid, it is impractical to dispatch all the thermal power’s reserve and it goes against dispatch application. Therefore the two key problems are how to determine which thermal powers to participate in the spinning reserve dispatch and how much spinning reserve capability they should have.This paper proposes an practical optimal allocation of spinning reserve with the consideration of the wind power. First, based on results of the theoretically optimal power flow, this paper divides the grid into several areas in accordance with the active power distribution factors for these factors show the link between one generator and one load. The concrete method is first to determine the load areas that are tightly related to the wind farms and then determine the conventional power generation units which are tightly related to the above load areas. We can use two different methods respectively based on sensitivity coefficient and the theory of power distribution to divide the grid into several areas. But the final plan is to choose the latter one by contrasting them. Second, the approach calculates the optimal power flow which aims to minimize the network loss with the original dual interior point method, of which only the selected thermal power’s outputs are optimized objects. Then a spinning reserve scheme which is convenient for dispatching application is gained. Finally, the proposed method is tested on the IEEE39-bus system. The results demonstrate that the proposed method can not only reduce the amount of the conventional power generation units which are selected in the spinning reserve dispatch, but also can receive an optimization effect which is close to the optimal power flow in theory, then show that the proposed approach is feasible and practical.