Active power output control parameter pre-processing method for hydropower station during automatic power generation

Abstract

The invention discloses an active power output control parameter pre-processing method for a hydropower station during automatic power generation. The method involves an automatic generation control (AGC) functional block, a proportion integration differentiation (PID) functional block and a pre-processing functional block, and a device parameter and a dynamic parameter are directly input or processed by the pre-processing functional block and then are sent to the AGC functional block and the PID functional block for updating. An active power set value of a single machine of each power generation set can be calculated according to a full-station active power target value of the hydropower station, PID closed-loop adjustment is carried out on the active power actual value of the single machine, and the running requirements of the power generation seat evading from a vibration region and one-time frequency adjustment of the hydropower station are met; and a pre-built mode of inputting a combination output model of an AGC machine set is adopted, data conversion existing in a machine set form is data in a power station form, the solution efficiency is improved, and the automatic active power output control demands of different large- and medium-size hydropower stations with multiple vibration regions and multiple types of machines sets can be met.

Description

technical field [0001] The invention belongs to the technical field of hydroelectric power generation control, and relates to a method for preprocessing parameters of automatic power generation active output control parameters of a hydropower station. Background technique [0002] The control of active power output of hydropower stations generally adopts that the active power target value of the whole plant is first distributed to each hydro-generator unit (referred to as unit) through the automatic generation control function (Automatic Generation Control, referred to as AGC), and then each unit is passed through the computer monitoring system. A method in which a programmable logic controller (ProgrammableLogicController, PLC for short) or a governor performs a proportional-integral-derivative (PID for short) closed-loop adjustment. But so far there is no systematic algorithm that covers and guides all active power control links such as hydropower unit output modeling, sta...

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Problems solved by technology

However, the problem of Document 1 is that it only involves the avoidance of the vibration zone, and does not propose the specific modeling of the combined vibration zone or operating zone (other than the combined vibration zone) of multiple units derived from the vibration zone of a single unit or calculation method; it is proposed that the operating time of the unit in the vibration zone shall not exceed 10 minutes, but there is no demonstration of the "10 minutes" operating time in the vibration zone; it is proposed that the units enter the vibration zone in turn according to the accumulated operating time and the priority of the unit running, but did not propose any specific methods involving time statistics, priority calculations, and power allocation

However, the problem of Document 2 is that it only involves the relevant issues of water head, and does not involve other links of automatic power generation active power control; it only proposes strategies to prevent active power fluctuations when the water head is abnormal, and does not make suggestions on how to improve the reliability of the water head measurement function of hydropower stations

However, document 4 does not solve the problem of cooperation between primary frequency modulation and AGC under the current mainstream opening control mode

[0007] None of the above-mentioned documents fully provides a systematic solution for the active power control of automatic power generation in hydropower stations

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