Multifunctional harmonic optimization intelligent controller and its control method

Abstract

The invention relates to a multifunctional harmonic wave optimizing intelligent controller and a control method thereof. According to the controller, an electricity collecting unit receives voltage and current sampling signals of a pumping unit power supply and distribution system, the current sampling signals are output to an electricity measuring unit, and then the electricity measuring unit inputs measuring data into a diagnosis unit; the diagnosis unit and a harmonic wave optimizing unit are in communication connection through a communication unit; and the diagnosis unit inputs switching value signals through an input unit, and control signals are output to an external protection executing element through an output unit. According to the method, after a system is electrified, multitask threads are started; and each thread is subjected to function processing, and the threads comprise an electricity collecting task thread, a displaying task thread, a harmonic wave diagnosis thread, a switching value input and output management thread, a communication management thread, a protection processing thread and a shunt measuring protection control management thread. The controller and the control method are widely used in related industries, the reliability of power supply and distribution protection is effectively improved, harmonic interference is removed, power factors are improved, measuring is accurate, and equipment damage is lowered.

Description

technical field [0001] The invention relates to a control technology applied to a power supply and distribution system of a pumping unit, in particular to a multifunctional harmonic optimization intelligent controller and a control method thereof. Background technique [0002] More than 85% of the power grid loads in the petroleum industry are inductive loads, such as various oil pumps and motors, which generally have problems of low power factor and large line loss. In recent years, as oilfields put forward higher requirements for energy-saving work and with the development of power electronics technology, oilfield enterprises have applied a large number of energy-saving devices with nonlinear characteristics in oilfield equipment in order to improve crude oil production and comprehensive economic benefits , such as inverters, thyristor voltage regulators, controllers, etc. While these electronic devices bring energy-saving benefits, they also inject a large amount of harmo...

AI Technical Summary

Problems solved by technology

[0006] In view of the deficiencies such as unreliable grounding and leakage protection, poor effect of harmonic elimination and reactive power compensation in the existing power supply and distribution equipment of pumping units, the technical problem to be solved by the present invention is to provide an effective protection for power supply and distribution Multifunctional harmonic optimization intelligent controller with reliability, elimination of harmonic interference, improvement of power factor and accurate measurement and control method thereof

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