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Method for controlling internal pressure of water/vapor receiver by optimal scheduling of mirror field

A technology for optimizing scheduling and receivers, applied in the field of solar energy, can solve problems such as high operating costs, achieve the effect of reducing the scale of the mirror field, reducing operating costs, and shortening the time for optimal solution

Active Publication Date: 2015-05-20
ZHEJIANG UNIV
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  • Application Information

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Problems solved by technology

However, the state switching of mirror field heliostats requires the use of electric energy, and frequent large-scale heliostat state switching will inevitably lead to high operating costs

Method used

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  • Method for controlling internal pressure of water/vapor receiver by optimal scheduling of mirror field
  • Method for controlling internal pressure of water/vapor receiver by optimal scheduling of mirror field
  • Method for controlling internal pressure of water/vapor receiver by optimal scheduling of mirror field

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings.

[0035] When the tower solar thermal power plant is in normal operation, the heliostats in the mirror field are divided into two states:

[0036] (1) Normal tracking state: When the power station is in normal operation, most of the heliostats in the mirror field are in the normal tracking state, and the solar radiation energy is concentrated on the receiver as the position of the sun changes. Such as figure 1 is the distribution of focus points on a receiver, where points 1, 2, 3, 4, and 5 are on the receiver, which are the focus target points of the heliostat in normal tracking state. When the energy required by the receiver decreases, the heliostat can quickly transfer the target point to the focus points 6, 7, 8, 9 around the receiver, thereby reducing the energy value gathered by the mirror field on the receiver.

[0037] (2) Standby state: In addition, some helio...

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Abstract

The invention discloses a method for controlling an internal pressure of a water / vapor receiver by optimal scheduling of a mirror field. According to the method, energy received by the receiver is changed and the internal pressure of the receiver is kept constant by carrying out optimal scheduling on the mirror field of a tower solar energy heat power station, carrying out partitioning on the whole mirror field of the tower solar energy heat power station, establishing the scheduling optimization problem of the mirror field, solving the scheduling optimization problem and changing a heliostat state of the mirror field according to an optimization result. 0-1 integer programming in the scheduling optimization problem is solved by adopting binary particle swarm optimization. By utilizing the mirror field optimal scheduling method disclosed by the invention, the heliostat state of the mirror field can be rapidly obtained and pressure stability of a receiver system can be well controlled.

Description

technical field [0001] The invention relates to the technical field of solar energy, in particular to a water / steam receiver, and provides a method for controlling the internal pressure of the water / steam receiver through optimal scheduling of mirror fields. Background technique [0002] The tower-type solar thermal power station uses a concentrating system (mirror field) to gather solar energy, which is absorbed by the working medium in the receiver on the top of the tower and converted into heat energy, and then uses the heat energy to generate superheated steam, which drives the steam turbine to generate electricity, and finally realizes the conversion of solar energy to electrical energy. Among them, in the tower-type solar thermal power station with water / steam as the heat transfer medium, the water / steam receiver is used as the power equipment of the power station, and its requirement is to provide qualified saturated steam for the next step of energy storage or power g...

Claims

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Application Information

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IPC IPC(8): G05D16/00
Inventor 赵豫红李佳燕刘紫军陈将
Owner ZHEJIANG UNIV
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