Control method for controlled wind power plant of wide area wind power control system

Abstract

The invention discloses a method for calculating the output controlled quantity and a wind power plant in a wind area wind power control system of a power system. The method comprises the steps of: calculating and evaluating control performance standard (CPS (Control Performance Standard) comprising CPS1 and CPS2) indexes controlled by interconnecting ties; judging whether the two indexes are qualified or not; if not, calculating the total controlled quantity of cutting off wind power plant output or recovering the wind power plant output in the whole network by the indexes; calculating and sequencing the regulating and controlling capacities of the wind power plants according to a weighting and scoring method; and calculating the numerical values for control by the wind power plants according to a predetermined current output percentage, combining the numerical value of the output controlled quantity of a whole power grid and sequencing results of the wind power plants, selecting the range of the wind power plants controlled at present, and issuing a control command to complete control operation. According to the invention, the precise control of the wind power plant is improved, and the demand for safe and stable operation of the power grid is satisfied.

Description

technical field [0001] The invention belongs to the field of dynamic monitoring of power systems, and in particular relates to a method for calculating output control quantities in a wide-area wind power control system of a power system and controlling a wind farm. Background technique [0002] With the development of my country's wind power technology and the emphasis on the development and utilization of renewable energy, wind power has developed rapidly in my country in recent years. The biggest difference between wind power generation and traditional hydrothermal power is the randomness, intermittency, and anti-peaking characteristics of wind power. In the early stage of wind power development in my country, due to the small installed capacity of wind power and low power consumption, the impact on the entire power grid is relatively small. However, with the increase in wind power installed capacity recently, the influence of the above characteristics has gradually expand...

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Problems solved by technology

The patent "A Wide-area Wind Power Peak Regulation Control System for Electric Power System" (Patent Publication No.: ZL200910080530.0) previously applied by the applicant proposed to control the wind farm with the deviation of tie line as the control target and adopt the strategy of circular queue. The method has become an important means of peak shaving control for dispatching and operating personnel. However, with the continuous expansion of the scale of the main station connected to the wind farm, higher requirements are put forward for the intelligent operation of the wind farm and the safe and stable operation of the power grid.

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