A control method for free power generation of wind farms in power systems considering grid security

Abstract

The invention relates to a free generation control method for a wind farm of an electric system in consideration of grid security, and belongs to the technical field of the operation and control of a new energy accessed power system. According to the principle of minimal abandoned wind and fair-share scheduling, when a wind power generation accepting space of a power grid is distributed to all wind farms according to a method of a minimal wind power generation load deviation, in the free generation state, one the one hand, the unnecessary abandoned wind of the wind farm can be prevented due to a small active set value, and the greater active set value can be prevented, therefore, the active capacity of the wind farm can exceed the bearing limit of a power grid. The method can be integrated in a wind power generation active control master station system operated by a control center, therefore, the system can implement an optimum control strategy according to a wind power generation operating state and the operating state of the power grid, and ensure the power grid to have enough underspin safe space; furthermore, the safe active power of a section of a connecting circuit between the wind farm and the power grid can be realized, and the fair-share scheduling among all wind farms can be considered.

Description

technical field [0001] The invention relates to a control method for free power generation of a wind farm in a power system considering the safety of a power grid, and belongs to the technical field of operation and control of new energy access to power systems. Background technique [0002] The strong randomness of wind resources, difficulty in forecasting, and anti-peak regulation make the active power dispatching and control of the power grid more difficult. How to maximize the utilization of wind power resources and absorb as much wind power as possible on the premise of ensuring the safety of the power grid has become one of the common challenges faced by the power grids where all wind power bases are located. At present, the industry has conducted a lot of research on the active power dispatching control after the wind power generation is connected, and obtained a series of research and application results. The actual field operation experience shows that the introduc...

AI Technical Summary

Problems solved by technology

This method relies on the experience of the operator, and it is difficult to guarantee the fairness of dispatching. At the same time, when the security of the power grid is not limited and there is room for wind power generation, the manual control method cannot restore the active power of the wind farm in time, resulting in unnecessary wind curtailment.

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