A strategy coordination optimization method for wind power thermal power cutting machine

Abstract

The invention provides a wind power-thermal power cutter strategy coordination optimization method. The method comprises the following steps that: step one, when a fault occurrence of the system is monitored, calculation is started to obtain a transient energy function of a wind power-thermal-power bundling system after the fault so as to determine whether the system is unstable; if so, the step two is executed; and if not, the cutter measure is not taken; step two, according to transient energy functions of thermal power generating units, whether any thermal power generating unit itself is unstable is determined; if so, the thermal power generating unit that is unstable is cut off and then the step one is executed; and if not, the step three is executed; step three, on the basis of the delivery power scale of the wind power-thermal-power bundling system before the fault and the delivery capacity limit of the power transmission channel after the fault, the thermal power generating unit capacity needing to be cut off is calculated; and after the cutter operation is completed and operation returns to the step one. According to the method provided by the invention, secure and stable operation of the wind power-thermal-power bundling delivery energy base station after the fault can be effectively guaranteed; the cutter capacities of the wind power and the thermal power are distributed reasonably; the effect of lost power generation capacity minimization is realized; the favorable conditions are created for system recovery after the fault; and the security and economy of the system are improved.

Description

technical field [0001] The invention relates to the field of safety and stability analysis of electric power systems, in particular to a strategy coordination optimization method for wind power and thermal power cutting machines. Background technique [0002] my country's wind energy resources are mainly concentrated in the three northern regions, where the local load level is low, the system scale is small, and the wind power consumption capacity is very limited. Large-scale wind power must be transported to other regions for consumption over long distances. The annual utilization hours of wind power are low, and the economy of long-distance transmission alone is very poor; at the same time, the frequent fluctuation of wind power on the transmission line is extremely unfavorable to the safe and stable operation of the system. Adopting the strategy of bundling and sending wind power and thermal power can not only effectively reduce the fluctuation of line power, but also ben...

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Problems solved by technology

[0005] The invention aims at the problem that it is difficult to ensure the stable operation of the system or the cost is too high by only removing the thermal power unit or the wind power unit after a serious failure of the wind-fired bundling energy base. Based on the impact of the acceleration power of the end system, a method for coordination and optimization of wind power and thermal power cut-off strategies is provided, and the transient energy function is used to optimize the ratio of wind power and thermal power cut-off, including:

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