Hydroelectric generating set speed regulator primary frequency modulation state double-set undisturbed switching device and method

Abstract

The invention discloses a hydroelectric generating set speed regulator primary frequency modulation state double-set undisturbed switching device and method, and the device comprises a speed regulatorwhich comprises a double-set controller, and an analog quantity signal output port AO1 of the double-set controller is connected with the input end of an electro-hydraulic conversion device; the output end of the electro-hydraulic conversion device is connected with a servomotor; a servomotor guide vane opening signal feedback end is connected with a guide vane signal acquisition port AI1 of thedouble-set controller; the state output end of a generator outlet circuit breaker is connected with a circuit breaker signal acquisition port DI1 of the double-set controller through an isolation circuit; a unit PT port is connected with a frequency signal acquisition port Ct1 of the double-set controller through a shaping circuit; a monitoring system is connected with the double-set controller; the technical problem that disturbance occurs when the unit is in a primary frequency modulation operation condition is solved.

Description

technical field [0001] The invention belongs to the field of power generation control of a governor of a hydroelectric unit, and in particular relates to a double-set disturbance-free switching device and method for a governor of a hydroelectric unit in a primary frequency modulation state. Background technique [0002] With the construction of large-scale hydroelectric units, the proportion of hydroelectric units in the power grid is also continuously increasing, and the problem that hydroelectric units affect the frequency stability of the power system is also gradually reflected. Reliability directly affects the safe and reliable operation and power quality of hydroelectric generating units and even power systems. In the power grid, the user's demand for electric energy and the power generated by the power generation company are always in balance. When there is an imbalance, the power grid must be adjusted. The main means of adjustment is primary frequency regulation. It...

AI Technical Summary

Problems solved by technology

When the frequency of the power grid fluctuates greatly, the governor performs a power frequency regulation action according to the actual power grid frequency, and the governor performs a frequency regulation mode. At this time, if there is a problem with one set of controllers, it will automatically switch to another set , at this time, if the previous switching method is still followed, if the given guide vane opening is equal to the actual measured value, then another set of controllers will perform calculation and control based on the actual frequency and the given value of the guide vane after switching If the opening of the guide vane continues to be executed, there will be an increased disturbance, which is equivalent to the action amount of the second frequency modulation. power control deviation

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