Working condition conversion method of speed regulator of pumped storage unit

Abstract

The invention discloses a working condition conversion method of a speed regulator of a pumped storage unit. The method comprises the following steps: (1) a state set, an event set, a state conversionfunction and an action set of a finite state machine are obtained by combing through various working conditions, external input events, conversion conditions among the various working conditions andaction programs executed by the various working conditions of the pumped storage unit on the basis of a finite state machine principle, wherein the state set, the event set, the state conversion function and the action set of the finite state machine are used for describing working condition conversion of the pumped storage unit; and (2) based on the state set, the event set, the conversion function and the action set of the finite state machine, the multiple working conditions, complex conversion relations and execution programs of the pumped storage unit are programmed. The method has the advantages that the limitation of a conventional trapezoid graph and a graph design method is overcome, the occurrence of wrong working condition conversion is effectively prevented, and the overall reliability of equipment is improved.

Description

technical field [0001] The invention relates to a method for switching working conditions of a governor of a pumped storage unit, and belongs to the technical field of electric power systems. Background technique [0002] In recent years, with the rapid development of my country's power grid construction and new energy, the security and stability of the power grid and the consumption of new energy have become increasingly prominent. Pumped storage power stations have been widely used as the most effective energy storage method for peak shaving and valley filling. Compared with conventional power stations, pumped storage units have more working conditions, complex conversion methods, frequent conversions, and higher safety and reliability. When the number of processes is small and independent of each other, the ladder diagram is easier to solve, but the pumped storage unit has dozens of working conditions and there is a conversion relationship between them, it is difficult to...

AI Technical Summary

Problems solved by technology

When the number of processes is small and independent of each other, the ladder diagram is easier to solve, but the pumped storage unit has dozens of working conditions and there is a conversion relationship between them, it is difficult to handle with the ladder diagram method, and the readability is very poor , even if it is designed, it is difficult to ensure that the process conversion is reliable

Although the graphical design method is concise, intuitive, vivid, and highly readable, generally advanced PLCs support graphical programming, but its essence is an improvement of the ladder diagram. When there are many program modules and are closely related to each other, the graphical method is also Difficult to describe clearly, there are problems such as connection crossover, conversion confusion, reliability is difficult to guarantee, etc.

[0003] Therefore, when the number of working conditions is small and relatively simple, the ladder diagram programming method is generally used to design, but for more than 20 complex working conditions and interrelationships of the pumped storage unit, the ordinary ladder diagram design method is difficult to solve and cannot guarantee safety and reliability.

Images