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Double-objective optimization method and system for pumped storage unit starting rule

A pumped-storage unit and dual-objective technology, applied in design optimization/simulation, computer-aided design, instrumentation, etc., can solve problems such as poor objective effect, poor optimization effect, and single-objective optimization results that cannot be taken into account

Active Publication Date: 2018-07-20
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

The single-objective optimization results may not be able to take into account the requirements of multiple contradictory objectives, and the optimized objective results may be very satisfactory, while the neglected objective results are very poor
For the combined objective function, expert experience needs to be used in the process of constructing the objective function. For inexperienced experimenters, the constructed objective function may not be accurate enough, making the optimization effect poor.
In addition, single-objective and combined-objective optimization can only obtain one solution, and the selectivity is low.

Method used

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  • Double-objective optimization method and system for pumped storage unit starting rule

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Embodiment approach

[0156] According to a preferred way, see Figure 5 , the present invention provides a preferred implementation of step (3), specifically:

[0157] Before starting the optimization calculation, pre-set the algorithm parameters. The maximum number of iterations is set to 500, the number of population particles is set to 200, the external storage set memory is set to 100, the initial value of the inertia weight w is set to 0.5, and the inertia weight decay rate d is set to 0.99,, c 1 、c 2 Both take 1.6.

[0158] Step1: Define the particles to include decision variables, speed overshoot, and speed rise time information;

[0159] Step2: Initialize particle S i The location of the decision variable X i (k) and the particle's flight speed V i (k), the current number of iterations k=1, i=1,..., M, M is the particle swarm size;

[0160] Step3: Set the decision variable X i (k) Substitute into the simulation model of the regulation system of the pumped storage unit, and simulate...

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Abstract

The invention discloses a double-objective optimization method and system for a pumped storage unit starting rule, and is used for optimizing a decision variable when a pumped storage unit water turbine is subjected to working condition starting. The method specifically comprises the following steps that: according to a pumped storage unit regulation system, establishing a simulation model; takingrevolving speed overshoot and revolving speed raising time, establishing a double-objective optimization function; under a constraint condition of the decision variable, a revolving speed curve and atarget function, carrying out iterative solving a pumped storage unit regulation system simulation model, and obtaining an optimal guide vane starting rule set. By use of the method, the evolving speed overshoot and the revolving speed raising time are selected as to optimization objectives, one group of optimal solutions can be searched, more selection choices are provided for decision makers, and a solution selected through decision represents an optimal starting rule. Optimal starting rule can make the working condition starting time of the pumped storage unit water turbine shorter, the revolving speed overshoot of the unit is smaller, the revolving speed regulation time of the unit is shorter, and the dynamic characteristic quality of a system transition process is better.

Description

technical field [0001] The invention belongs to the technical field of hydroelectric power generation, and more specifically relates to a method and system for dual-objective optimization of the start-up schedule of a pumped-storage unit, which are used to optimize the start-up schedule when the pumped-storage unit is running under start-up conditions. Background technique [0002] The pumped storage power station has become an indispensable part of the power grid because of its functions of peak shaving and valley filling, frequency modulation and equalization. It is precisely because the pumped storage power station undertakes tasks such as peak shaving and valley filling and frequency regulation in the power system that the pumped storage unit starts and stops frequently. When the pumped storage unit is turned on, due to the time delay of the guide vane actuator and the large inertia of the unit itself, it takes a long time for the unit to reach a stable speed, which is c...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/20G06F2119/12
Inventor 李超顺侯进皎汪赞斌赖昕杰张楠
Owner HUAZHONG UNIV OF SCI & TECH
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