Reactive power control method and reactive power control system for thermoelectric unit generators

Abstract

The invention discloses a reactive power control method for thermoelectric unit generators. The method includes: detecting whether a timing cycle is reached or not, and starting a subsequent step after the timing cycle is reached; sending a pre-regulating command including generator reactive power regulating target parameters to each generator in a thermoelectric unit; enabling each generator to receive the pre-regulating command, generate pre-regulating amount thereof and feed back the pre-regulating amount; receiving the pre-regulating amount fed back by each generator, judging whether the pre-regulating amount is within the allowed range or not, and as for the pre-regulating amount in the allowed range, generating formal regulating amount including a generator number based on the pre-regulating amount; as for the pre-regulating amount beyond the allowed range, recording the generator number without generating the formal regulating amount; sending the formal regulating amount, and after each generator receives the formal regulating amount, enabling each generator to regulate an excitation regulator according to the formal regulating amount accordant to the number thereof to increase or decrease excitation current so as to regulate reactive power; and repeating the steps.

Description

technical field [0001] The invention relates to power grid control technology, in particular to a reactive power control method and control system of a thermoelectric unit generator. Background technique [0002] Many power generation and electrical equipment work according to the principle of electromagnetic induction, such as distribution transformers, generators, motors, etc., which rely on the establishment of an alternating magnetic field to convert and transfer energy. The electric power required to establish an alternating magnetic field and induced flux is called reactive power. The so-called "reactive power" is not "useless" electric power, but its power is not converted into mechanical energy or heat energy. Therefore, in addition to the active power supply, the reactive power supply is also required in the power supply system, both of which are indispensable. [0003] There are three main methods of reactive power compensation for electrical equipment: low-volta...

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Problems solved by technology

The switching of capacitors is carried out by the whole group, and smooth adjustment cannot be achieved.

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