| 基于变步长功率跟踪的有功备用式PV-VSG控制策略 |
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| 引用本文： | 张海峥,张兴,李明,张行,管玮琦,赵为. 基于变步长功率跟踪的有功备用式PV-VSG控制策略[J]. 电力系统自动化, 2019, 43(5): 92-100 |
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| 作者姓名： | 张海峥 张兴 李明 张行 管玮琦 赵为 |
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| 作者单位： | 合肥工业大学电气与自动化工程学院;阳光电源股份有限公司 |
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| 基金项目： | 国家重点研发计划资助项目(2016YFB0900300)；国家自然科学基金资助项目(51677049) |
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| 摘 要： | 传统光伏发电系统多以最大功率跟踪方式并网,不具备有功调频能力,而将其改造的光伏虚拟同步发电机多以配备储能的方式实现虚拟同步功能,但储能设备过于昂贵,主电路改造成本较大。针对上述问题,在不改造传统集中式光伏逆变器主电路的情况下,提出一种基于变步长功率跟踪的有功备用式光伏虚拟同步发电机策略,通过有功备用方式实现虚拟同步功能,节省改造成本,所提方法克服了固定步长跟踪方法快速性和稳定性不能兼容的问题,并且使光伏虚拟同步发电机快速精确地提供惯性及阻尼支撑控制。仿真结果验证了所提控制策略的有效性。
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| 关 键 词： | 光伏虚拟同步发电机；功率跟踪；变步长；有功备用；调频调压 |
| 收稿时间： | 2018-07-20 |
| 修稿时间： | 2019-01-18 |
Control Strategy of PV-VSG in Active Power Reserve Mode Based on Power Tracking with Variable Step |
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| ZHANG Haizheng,ZHANG Xing,LI Ming,ZHANG Hang,GUAN Weiqi and ZHAO Wei. Control Strategy of PV-VSG in Active Power Reserve Mode Based on Power Tracking with Variable Step[J]. Automation of Electric Power Systems, 2019, 43(5): 92-100 |
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| Authors: | ZHANG Haizheng ZHANG Xing LI Ming ZHANG Hang GUAN Weiqi ZHAO Wei |
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| Affiliation: | School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China,School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China,School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China,School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China,School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China and Sungrow Power Supply Co. Ltd., Hefei 230088, China |
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| Abstract: | Most of the traditional photovoltaic power generation systems are connected to power grid by the maximum power tracking mode and do not have the frequency modulation capability by adjusting active power. However, the photovoltaic virtual synchronous generator(PV-VSG)that is modified by them are mostly equipped with energy storage to realize the virtual synchronization function, but the energy storage equipment is too expensive, and the main circuit transformation cost is large. To solve the problems above, a PV-VSG control strategy is proposed based on power tracking of variable step in active power reserve mode saves transformation cost by realizing virtual synchronization function through active power reserve mode without transforming the main circuit of traditional centralized photovoltaic inverter. The proposed method overcomes the incapable of compatibility and stability for the tracking method of fixed step, enables the PV-VSG to provide inertial and damping support control quickly and accurately. Simulation results verify the effectiveness of the proposed control strategy. |
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| Keywords: | photovoltaic virtual synchronous generator(PV-VSG) power tracking variable step active power reserve frequency modulation and voltage regulation |
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