Pulse coefficient calculation method for automatic voltage control system of thermal power plant

Abstract

The invention discloses a pulse coefficient calculation method for an automatic voltage control system of a thermal power plant. The pulse coefficient calculation method comprises the following steps of S1, storing related information of a control instruction after the automatic voltage control system outputs the control instruction to a machine set; S2, acquiring real-time information before the next regulation period is reached, counting real-time reactive power with maximum reactive power change quantity during outputting the control instruction, and taking a counting result and a corresponding control instruction as a group of newest control samples to be stored; S3, presetting a threshold value N; and S4, calculating a pulse coefficient according to the N groups of newest control samples which are stored. According to the pulse coefficient calculation method, the pulse coefficient of the machine set is automatically calculated in real time according to each control instruction emitted from the automatic voltage control system to the machine set during the running process of the machine set, the defect of manual operation is prevented, and the calculation accuracy and efficiency of the pulse coefficient are favorably improved.

Description

technical field [0001] The invention relates to the technical field of automatic voltage control (AVC) of a thermal power plant, in particular to a calculation method for a pulse width coefficient of an automatic voltage control system of a thermal power plant. Background technique [0002] After the automatic voltage control system receives the control command from the dispatching master station, through a certain allocation strategy, the control target is allocated to each unit to form the reactive power target of the unit, but it cannot directly control the unit, but through the AVR of the control unit. Indirectly control the reactive power output of the unit. This method needs to convert the reactive power increment corresponding to the reactive power target into a magnetization or demagnetization pulse signal that can be recognized by the AVR. At this time, it involves the pulse width coefficient of the unit concerned in this patent. Coefficient for converting reactive ...

AI Technical Summary

Problems solved by technology

However, the number of artificial pulse width coefficient tests is limited, and most of the data acquisition is human observation and manual calculation, so the calculated coefficient has a lot of loss in accuracy.

In addition, the pulse width coefficient of the unit is different when the unit is in different states, or when the AVR is repaired and replaced. One test is not enough, but it is impossible to do this kind of test frequently, so there are many artificial test methods. disadvantages

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