针对液压蓄能式波能装置由于蓄能器的解耦作用无法最大功率跟踪,不可控整流模式液压发电机组频繁启停、功率不可控、无法自适应跟踪来波功率等问题,提出基于高频整流的功率跟踪控制方法。建立完整的液压蓄能发电系统以及压力负载数学模型,通过高频整流器控制发电机转速,改善液压发电系统输出特性,实现液压发电机组在功率变化范围内自动跟踪来波功率。仿真试验结果表明,液压发电机组马达输入流量能自动跟踪液压缸的输出流量,系统压力自动匹配来波功率。因此,功率跟踪控制方法可改善波能装置液压发电机组特性,减少启停,实现功率跟踪与自适应负载调节,有利于推进液压蓄能式波能装置研究。
Abstract
The hydraulic energy storage wave energy converter is unable to achieve maximum power point tracking due to the decoupling effect of accumulators. In addition, the hydraulic generator sets with uncontrollable rectification mode result in the frequent starts and stops, uncontrollable power output, and failure to adaptively track the incoming wave power. Therefore, a power tracking control method based on high-frequency rectification is proposed. The mathematical models of the hydraulic energy storage power generation system and pressure load are established. On this basis, the generator speed is controlled by a high-frequency rectifier, thereby improving the output characteristics of the hydraulic power generation system. It achieves automatic tracking of the incoming wave power by the hydraulic generator set within the power variation range. The simulation test results indicate that the input flow of the hydraulic motor rate can automatically track the output flow rate of the hydraulic cylinders, and the system pressure can automatically match the incoming wave power. Therefore, the power tracking control method enhances the characteristics of the hydraulic generator set of the wave energy converter and reduces the starts and stops, thereby achieving both wave power tracking and adaptive load regulation. It is beneficial in promoting the further research on the hydraulic energy storage wave energy converter.
关键词
波能装置 /
功率控制 /
流量 /
液压发电机组 /
功率跟踪 /
负载匹配
Key words
wave energy converter /
power control /
flow rate /
hydraulic generator set /
power tracking /
load matching
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基金
广东省重点领域研发计划（2021B0202070002）; 2024年广东省海洋经济发展专项资助（粤自然资合GDNRC[2024]21号）; 广州市基础研究计划基础与应用基础研究（202201010434）; 三亚崖州湾科技城科研项目（SKJC-2020-01-007）
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