A Modeling Method for Multi-machine Combination for Hydropower Units with Multi-operating Areas

Abstract

The invention discloses a hydropower station AGC combined output model and a combined operation region calculation method. A set AGC control module establishes a combined output model of a hydropower station generator set according to received equipment parameters and dynamic parameters related to automatic power generation active output control of a hydropower station, and calculating combined operation regions, a combined optimal operation region and a combined limit operation region. According to the invention, the combined output model for the AGC set is established in advance, the data in the set type is converted into the data in the station type, the solving efficiency is improved, and the automatic active output control requirements of different large and medium hydropower stations with multiple vibration regions and multiple set types can be met.

Description

technical field [0001] The invention belongs to the technical field of hydroelectric power generation control, and relates to a multi-unit combination modeling method for hydroelectric units with multiple operating areas. Background technique [0002] The control of active power output in 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 respectively. The monitoring system uses a programmable logic controller (Programmable Logic Controller, referred to as PLC) or a speed governor to perform proportional integral derivative (abbreviated as PID) 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, station-wid...

AI Technical Summary

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

Images