A control method for exceeding the limit of active power of the connecting line section between wind farm and power grid

Abstract

The invention provides a method for controlling threshold-crossing of active power of wind power plant and power grid connecting line sections, and belongs to the technical field of operation and control of new energy access power systems. The method includes the steps that according to the deviation between an active power real-time value and an upper limit value of the wind power plant and power grid connecting line sections, a section set needing threshold-crossing correction is determined, in combination with the sensitivity of the active power of wind power plants to the active power of the wind power plant and power grid connecting line sections, wind power plant active power regulating capacity constraints and power grid safety constraints, a secondary planning model is constructed, and threshold-crossing of the sections are eliminated and fair dispatching of the wind power plants is taken into consideration. The method can be integrated into a wind power generation active power control main station system operating in a dispatching center, the system can take the most appropriate control policy in real time according to the wind power generation operation state and the power grid operation state, safety of the active power of the wind power plant and power grid connecting line sections is guaranteed, and fair dispatching of the wind power plants is taken into consideration.

Description

technical field [0001] The invention relates to a control method for exceeding the limit of active power of a connecting line section between a wind farm and a power grid, and belongs to the technical field of operation and control of a new energy access power system. 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 in...

AI Technical Summary

Problems solved by technology

This method relies on the experience of the operator, and it is difficult to accurately and quickly release the cross-limit active power of the section, and it is also difficult to take into account the safety of the line section and the economical efficiency of the wind farm operation.

Images