A method for active power control of hydroelectric units in dual-suggested operating areas

Abstract

The invention discloses a method for controlling the active power of a hydroelectric unit in a double-suggested operating area, and belongs to the technical field of hydroelectric power generation control. Divide automatic power generation control function modules into power station-level AGC function modules, unit-level PLC function modules, and unit-level governor function modules and assign tasks; determine parameters, assignment relationships, and dependencies; pre-establish models for all units that are put into AGC control , to calculate the optimal operating range of the unit put into AGC control; and calculate the active power distribution value of the single-unit AGC, and carry out the active power control of the hydroelectric unit in the double-suggested operation area according to the obtained single-unit AGC active power distribution value. It is suitable for the hydropower station whose interval division is from low to high in the order of vibration area→recommended operation area 1→restricted operation area→recommended operation area 2 unit type, and can quickly calculate the stand-alone AGC of each unit according to the total active power setting value of the hydropower station Active power distribution value and stand-alone active power setting value can meet the operation requirements of the unit avoiding the vibration area and the restricted operation area at the same time.

Description

Technical field [0001] The present invention belongs to the technical field of hydraulic power generation control, and in particular to a dual proposed operational area hydropower unit has a power-acting power control method. Background technique [0002] Hydropower Station is commonly used to allocate the total power set value of the whole station through the automatic power control function (Automatic Generation Control, AGC), and then the unit), and then various units The power adjustment mechanism performs a closed-loop adjustment in accordance with the active power allocation value of the stand-alone AGC. In the long run, in the practical application of each hydropower station, the automatic power generation control function has generally exist algorithm rough, integrity lack, poor functional blocks, and the logic does not match between the strategy, the distribution delay, the distribution result is not ideal, etc. It is prone to various abnormal conditions when the power s...

AI Technical Summary

Problems solved by technology

[0006] Through the work of Documents 1-7, although the unity of active power control strategies of hydropower stations has been greatly improved, and abnormal problems caused by conflicts between strategies have been basically eliminated, there are still some problems to be solved: 1) There are still some unreasonable problems Strategy and logic, and brought some problems during the operation process, for example: the single-unit active power actual value of the unit whose active power closed-loop adjustment function has not been put into use participates in the AGC distribution calculation, but because the active power of the unit is always in a state of small changes, Therefore, the AGC function will be frequently redistributed; and the current input of the AGC function of the whole plant is based on the premise of the AGC control of the organic unit. This logic has major flaws in practical applications

2) Document 7, on the basis of Documents 1-6, considers the problem that the unit repeatedly crosses the vibration zone under the condition of frequent secondary frequency regulation, but in the selection of the two allocation strategies, it is the priority to prevent the unit from entering the restricted operation The selection of the two strategies of preventing the unit from crossing the vibration zone or giving priority to preventing the unit from crossing the vibration zone is slightly extreme and mechanical, resulting in some working conditions, especially under the control of the strategy of giving priority to avoiding the unit from crossing the vibration zone, the selection of the unit distribution mode is not very clear. ideal

From this point of view, one of the problems of Documents 1-7, especially Documents 1-6, is that their methods are completely designed for the unit types that need to pass through the vibration zone transition from the operating zone to the operating zone (that is, the second type of unit), and it is difficult to Applicable to the third category of hydroelectric units, but at the same time there is no fully customized method design for the characteristics of the second category of hydroelectric units

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