WIND POWER BUNDLING CONTROL METHOD AFTER WIND POWER AND THERMAL POWER ARE CONNECTED TO GRID

摘要

The present invention has disclosed a wind power bundling control method after wind power and thermal power are connected to a power grid in the field of electric power system security technology, including regulating wind power output and thermal power output forward or backward; calculating the transient stability margin of the grid, load level index of element and voltage out-of-limit index of busbar after regulating wind power output and thermal power output respectively; calculating wind power/thermal power paying value according to the transient stability margin of the grid, load level index of element and voltage out-of-limit index of busbar after regulating wind power output and thermal power output; if wind power/thermal power paying value is larger than set threshold value, regulating wind power output and thermal power output backward/forward; if wind power/thermal power paying value is smaller than set threshold value, regulating wind power output and thermal power output forward/backward. The present invention provides a wind power bundling control method after wind power and thermal power are connected to the power grid to ensure reasonable output of wind power and thermal power, so as to guarantee the power grid operates normally.

主权项

1. A wind power bundling control method after wind power and thermal power are connected to a grid characterized in the method comprises:
step 1: providing initial values for winder power output and thermal power output, regulating wind power output and thermal power output forward under the condition of satisfying transient stability of the grid or regulating wind power output and thermal power output backward under the condition where the transient stability of the grid is not satisfied; wherein regulating wind power output and thermal power output forward refers to decreasing thermal power output and increasing wind power output; and regulating wind power output and thermal power output backward refers to decreasing wind power output and increasing thermal power output; step 2: calculating a transient stability margin of the grid λSl, a load level index of an element λL and a voltage out-of-limit index of a busbar λU respectively after regulating wind power output and thermal power output; step 3: calculating wind power/thermal power paying value according to the transient stability margin of the grid λSl, the load level index of the element λL and the voltage out-of-limit index of the busbar λU after regulating wind power output and thermal power output; step 4: if wind power/thermal power paying value is larger than preset threshold value, regulating wind power output and thermal power output backward; if wind power/thermal power paying value is smaller than preset threshold value, regulating wind power output and thermal power output forward.