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Double-target optimization method and system for guide-vane closure rule of pump storage group

A technology of guide vane closing rule and pumped storage unit, applied in the fields of hydroelectric power generation and pumped storage unit control, can solve the problems of lack of general methods, low optimization efficiency, and inability to reflect the contradictory characteristics of objectives.

Inactive Publication Date: 2018-07-13
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0004] (1) It cannot reflect the contradictory characteristics of the target; (2) The target weight coefficient is determined empirically, and there is no general method; (3) When optimizing the guide vane closing law, it is necessary to continuously adjust the target weight and conduct simulations to obtain different The optimization result required by the insurance calculation calculation, the optimization efficiency is low

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[0119] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0120] The method of the present invention will be described in detail below by taking a simulated water turbine speed control system under a certain load shedding condition as the implementation object of the present invention.

[0121] The method process of the present invention is as figure 1 As shown, specifically:

[0122] Step (1) Collect the unit speed n(0) and volute water hammer press...

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Abstract

The invention provides an optimization method and system for pump-storage-group double-target guide-vane closure based on double-target optimization. The optimization method includes the specific steps that the group rotating speed and volute water hammer pressure at an initial moment are collected; a pump-storage-group transient process simulation model is established, model output is the group rotating speed and the volute water hammer pressure, and model input is the guide-vane closure rule; under the constraint conditions of a control parameter and a target function, a double-target optimization function serves as a target, the pump-storage-group transient process simulation model is iteratively solved, and an optimization control parameter is obtained. According to the optimization method and system, the rotating speed index and the water hammer pressure index are simultaneously optimized, and a closure rule optimization scheme set can be obtained by solving the optimization modelone time; the opposition characteristic of the target is fully responded, and the optimization efficiency of the guide-vane closure rule is remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of hydroelectric power generation, relates to the technical field of control of a pumped storage unit, in particular to a dual-objective optimization method and system for the closing law of guide vanes of a pumped storage unit. Background technique [0002] In the power system, the pumped storage power station plays an important role in peak regulation, frequency regulation and emergency backup, and is the key to maintaining the safe, stable and reliable operation of the power system. When the unit is in the working condition of the turbine, the power grid or the unit fails and the load needs to be shed, or the power system suddenly loses power when the water pump is in operation, and the turbine loses driving force, the governor controls the guide vane to close according to the established closing law of the guide vane. The two core indicators in the transition process of load shedding and water pump power...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/20G06F2111/06
Inventor 李超顺赖昕杰许颜贺邹雯侯进皎张楠
Owner HUAZHONG UNIV OF SCI & TECH
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