Control method and device for excitation adjustment coefficient of generator

Abstract

The invention provides a method and a device for controlling an excitation difference adjustment coefficient of a generator. The method comprises the following steps; A, obtaining parameters of a system; B, determining the optimal reactive compensation capacity and excitation difference adjustment coefficient of the generator by taking the sum of injection powers of a generator node and a load node in the system as an optimization object, and taking the flow equation constraint, the limit and constraint of the excitation difference adjustment coefficient and reactive compensation capacity, the security constraint of each node voltage, and the reactive power constraint of the generator node as the constraint conditions; C, controlling the generator by using the optimal excitation difference adjustment coefficient of the generator, and performing the reactive compensation on a compensation node by using the optimal reactive compensation capacity. According to the method and device for controlling the excitation difference adjustment coefficient of the generator, the transmission losses of an electric power system are reduced; meanwhile, the voltage of the whole power grid is remarkably increased, and the running economic benefits and the quantity of electric energy during system running are improved.

Description

technical field [0001] The invention relates to the field of power system analysis and control, in particular to the optimization control technology of power system equipment. Background technique [0002] Generator excitation adjustment is mainly for voltage compensation of generator reactive current and reactive power changes, and plays a role in stably distributing the reactive power of generators running directly in parallel and maintaining the voltage stability of the high-voltage side busbar of the transformer. Now the power system widely uses reactive power compensation devices to improve the load power factor and voltage quality, so the reactive power compensation capacity will affect the setting of the excitation adjustment coefficient of the generator. [0003] So far, the control method of the generator excitation variation coefficient in this field mainly involves the method of considering the influence of the variation coefficient on the stability, especially th...

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Problems solved by technology

Now the power system widely uses reactive power compensation devices to improve the load power factor and voltage quality, so the reactive power compensation capacity will affect the setting of the excitation adjustment coefficient of the generator

[0003] So far, the control method of the generator excitation variation coefficient in this field mainly involves the method of considering the influence of the variation coefficient on the stability, especially the control method of the variation coefficient with the goal of minimizing the network loss, and the control method of the entire power grid. In the operation mode, the control method of the differential coefficient for the purpose of meeting the operation requirements of the power grid, but the control method of the excitation differential coefficient of the generator that has not considered the reactive power compensation of the grid

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