Single-suggested operation area hydroelectric generating set active power control method

Abstract

The invention discloses a single-suggested operation area hydroelectric generating set active power control method, which belongs to the technical field of hydroelectric generation control. An automatic power generation control function is divided into a power station-level AGC module, a unit-level PLC module and a unit-level speed regulator module, then tasks are allocated, and parameters, assignment relationships and dependency relationships are determined; and an intermediate table containing all possible distribution modes of AGC control units and corresponding combined operation intervalsare established, the optimal unit distribution mode of the units which are put into AGC control is determined, an AGC active distribution value of a single unit is calculated, and active power control on hydroelectric generating sets in a single suggested operation area is carried out. The method is suitable for hydropower stations of which intervals are sequentially divided into a vibration area1, a limited operation area, a vibration area 2 and a suggested operation area unit type from low to high. The single-unit AGC active power distribution value and the single-unit AGC active power setting value of each unit can be quickly calculated according to the total active power setting value of the hydropower station, and meanwhile, the operation requirements of the units for avoiding a vibration area and a limited operation area are met.

Description

technical field [0001] The invention belongs to the technical field of hydroelectric power generation control, and in particular relates to a method for controlling the active power of a hydroelectric unit in a single recommended operation area. Background technique [0002] The control of active power output of hydropower stations generally adopts that the total active power set value of the whole station is distributed to each hydroelectric generating unit (hereinafter referred to as unit) through the automatic generation control function (Automatic Generation Control, referred to as AGC), and then each unit The power adjustment mechanism performs closed-loop adjustment according to the active power distribution value of the single AGC. In the actual application of various hydropower stations for a long time, the automatic power generation control function generally has shortcomings such as rough algorithm, lack of integrity, poor connection of each function block, logic m...

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 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 since the unit active power 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 passes through the vibration zone under the condition of frequent secondary frequency regulation, but in the selection of two allocation strategies, it is to give priority to preventing 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 distribution mode of the unit is not very clear. ideal

From this point of view, one of the problems of literatures 1-7, especially literatures 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 (ie, 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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