Abstract
As one of the most promising power generation technologies using renewable energy sources, and the solar thermal electric power generation may be developed to alleviate the energy crisis. But it still faces the obstacles of excessive cost and low energy efficiency nowadays. To this end, a method of using heliostats cluster control is proposed to solve the main contradiction in solar tower power plants. In this approach, the entire heliostats field will be divided into a few groups, and a leader heliostat with high-precision closed-loop control is arranged in each group while the remaining heliostats as follower heliostats. On this basis, a leader heliostat tracking model is established and a leader-to-follower heliostat conversion mode is designed. Meanwhile, the posture information of adjacent leader heliostats is communicated to guarantee the tracking reliability. According to the simulation results of this paper, this method not only improves the automation level of solar tower power plants at this stage, but also reduces the computing complexity of the heliostats field control algorithm. Moreover, the proposed method improves the precision of the control, and also reduces the control cost, making the closed-loop control of the heliostats field possible.
Highlights
With the vigorous development of renewable energy, increasing attention has recently drawn to the solar thermal electric power generation
This paper will apply the principle of the leader-follower control strategy to scientifically block the heliostat field, and set one or more leader heliostats in each heliostat group
COMMUNICATION BETWEEN LEADER HELIOSTATS Due to the characteristic of the cluster control, the control accuracy relies on the accuracy of the leader heliostats
Summary
With the vigorous development of renewable energy, increasing attention has recently drawn to the solar thermal electric power generation. They applied different optimization algorithms to design different heliostat field layout In this way, the aim of reducing the land costs while increasing energy efficiency is achieved. This paper will apply the principle of the leader-follower control strategy to scientifically block the heliostat field, and set one or more leader heliostats in each heliostat group These heliostats are equipped with high-precision sensors and the real-time feedback correction is made. Heliostats differ from other kind of vehicle in that we don’t need to consider the relationship between the spatial distance position and the velocity acceleration of each individual in general coordinated control, while we only need to consider the orientation problem in the heliostat control. With the improvement of the accuracy of the sensor and the corresponding detection equipment, this control strategy will be more meaningful for the spot problem and the temperature control of the cavity receiver
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