Multi-target coordination control method and system for wind power plant and conventional energy

Abstract

The invention discloses a multi-target coordination control method and system for a wind power plant and conventional energy, and the method comprises the steps: calculating the net load of a regional system composed of the wind power plant and the conventional energy according to the relation between the actual transmitted power and the transmittable power of the wind power plant, and determining an adjustable AGC wind power plant; setting an AGC controller based on a model predictive control algorithm; and performing dynamic optimization calculation and dynamic optimization control on all AGC power supplies in the adjustable AGC wind power plant by using the set AGC controller. According to the multi-target coordination control method for the wind power plant and the conventional energy provided by the invention, dynamic optimization control is performed on the adjustable AGC wind power plant, so that the influence of fluctuation and uncertainty of wind energy on AGC control is avoided, and multi-target coordination stable control of the wind power plant and the conventional energy is realized.

Description

technical field [0001] The present application relates to the technical field of power generation control, and in particular, to a multi-objective coordinated control method and system for wind farms and conventional energy sources. Background technique [0002] Wind farms have active power control capabilities. During normal operation, in order to reserve a certain reserve capacity, the active power control commands of wind farms are often lower than the producible power. The national standard has clearly pointed out that wind farms that can participate in grid connection should have the ability to participate in frequency regulation, peak regulation and backup of the power system. Assuming that the active power control command of the wind farm is lower than the producible power, the actual generated power of the wind farm should track the active power control command value. . However, wind power is uncertain and volatile, and the producible power of the wind farm may not ...

AI Technical Summary

Problems solved by technology

However, wind power has uncertainties and fluctuations. It is possible that within a certain period of time, the power that can be generated by the wind farm cannot reach the active power control command, and there is no reserve capacity. At this time, the actual power generated by the wind farm is the power that can be generated.

Since the disturbance sources of the regional system frequency include not only load disturbance but also wind farm active output disturbance, assuming that the thermal power unit output can track the control command, the wind farm with reserve capacity can also track the control command; but when the actual power generated by the wind farm cannot When the control command is reached, there are high fluctuations and uncertainties. At this time, the wind farm cannot participate in AGC, which causes confusion in the AGC control logic, and thus cannot effectively realize the multi-objective coordinated control of the wind farm and conventional energy sources.

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