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

A technology of disturbance-free switching and hydroelectric units, which is applied in the direction of controlling generators, electrical components, control systems, etc., and can solve problems such as deviations, high-power control of units, and increased disturbances

CN110492501APending Publication Date: 2019-11-22GUIZHOU POWER GRID CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2019-11-22

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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.
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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...

Examples

Embodiment Construction

[0028] A dual-set non-disturbance switching device and method for the primary frequency modulation state of a governor of a hydroelectric unit includes a double-set controller, an analog signal output port AO1 for calculation and control output, a digital signal circuit breaker signal acquisition port DI1, and a frequency pulse signal acquisition port Ct1 , Electro-hydraulic conversion device, isolation circuit, PT signal shaping circuit and DIn module that accepts monitoring instructions.

[0029] The AO1 port in the device is an analog signal output port, which mainly outputs the calculated guide vane opening of the controller, amplifies and converts the signal through the electro-hydraulic conversion device, and finally controls the opening of the guide vane of the hydroelectric wheel through the action of the servomotor , so as to control the turbine flow.

[0030] The AI1 port in the equipment is the guide vane signal acquisition port, which mainly collects the guide vane...