基于Lyapunov控制策略的光伏储能型qZSI控制系统

doi:10.12204/j.issn.1000-7229.2023.02.011

电力建设 ›› 2023, Vol. 44 ›› Issue (2): 110-121.doi: 10.12204/j.issn.1000-7229.2023.02.011

基于Lyapunov控制策略的光伏储能型qZSI控制系统

郑怀华¹(), 毛羽¹(), 程启明²(), 陈海燕³()

1.浙江省送变电工程有限公司,杭州市310016
2.上海电力大学自动化工程学院,上海市 200090
3.上海自动化仪表有限公司,上海市 200070

收稿日期:2022-07-17 出版日期:2023-02-01 发布日期:2023-01-30
通讯作者: 程启明(1965),男,博士,教授,硕士生导师,主要研究方向为电力系统自动化、发电过程控制、先进控制及应用等,E-mail:chengqiming@sina.com。
作者简介:郑怀华(1975),男,学士,高级工程师,主要研究方向为电力系统自动化、电力电子控制、输变电技术与工程等,E-mail:385883069@qq.com;
毛羽(1978),男,硕士,高级工程师,主要研究方向为电力系统自动化、电力电子控制、输变电技术与工程等,E-mail:91034511@qq.com;
陈海燕(1998),女,硕士,工程师,主要研究方向为新能源发电控制、电力电子控制等,E-mail:1330112156@qq.com。
基金资助:
国家自然科学基金资助项目(61905139);上海市电站自动化技术重点实验室项目(13DZ2273800)

Control System of Photovoltaic Energy Storage Quasi-Z-source Grid-connected Inverter Applying Lyapunov Control Strategy

ZHENG Huaihua¹(), MAO Yu¹(), CHENG Qiming²(), CHEN Haiyan³()

1. Zhejiang Power Transmission and Transformation Engineering Co., Ltd., Hangzhou 310016, China
2. College of Automation Engineering, Shanghai University of Electric Power, Shanghai 200090, China
3. Shanghai Automation Instrument Co., Ltd., Shanghai 200070, China

Received:2022-07-17 Online:2023-02-01 Published:2023-01-30
Supported by:
National Natural Science Foundation of China(61905139)

摘要/Abstract

摘要：

光伏发电采用储能型准Z源逆变器(quasi-Z-source inverter,qZSI)能够降低功率波动,但非线性储能型qZSI常采用线性PI控制策略,难以达到理想的控制性能,为此提出基于非线性Lyapunov控制的储能型qZSI控制系统。首先,为满足负载功率要求,设计出储能单元能量管理系统;然后,根据Lyapunov理论为储能型qZSI系统设计出能量存储函数和控制律,并选取合适的Lyapunov控制增益;最后,在Matlab/Simulink仿真平台上,在4种不同工况下对所提Lyapunov控制与传统PI控制两种控制系统做了控制性能实验仿真比较,结果表明所提Lyapunov控制系统的响应速度更快、控制精度更高、鲁棒性更强。

关键词: 光伏, 储能型qZSI, 能量管理系统, Lyapunov控制, PI控制

Abstract:

The use of energy storage quasi-Z-source inverter (qZSI) in photovoltaic power generation can reduce power fluctuations, but for nonlinear energy storage qZSI, linear PI control strategy is often used, which is difficult to achieve the ideal control performance. Therefore, an energy storage qZSI control system based on nonlinear Lyapunov control is proposed in this paper. Firstly, the energy management system of energy storage unit is designed to meet load power requirement. Then, according to Lyapunov theory, the energy storage function and control law are designed for energy storage qZSI system, and the appropriate Lyapunov control gain is selected. Finally, on Matlab/Simulink simulation platform, the performance of Lyapunov control system and traditional PI control system are simulated and compared under four different working conditions. The results show that Lyapunov control system has faster response, higher control accuracy and stronger robustness.

Key words: photovoltaic, energy storage qZSI, energy management system, Lyapunov control, PI control

中图分类号:

TM464

郑怀华, 毛羽, 程启明, 陈海燕. 基于Lyapunov控制策略的光伏储能型qZSI控制系统[J]. 电力建设, 2023, 44(2): 110-121.

ZHENG Huaihua, MAO Yu, CHENG Qiming, CHEN Haiyan. Control System of Photovoltaic Energy Storage Quasi-Z-source Grid-connected Inverter Applying Lyapunov Control Strategy[J]. ELECTRIC POWER CONSTRUCTION, 2023, 44(2): 110-121.

图/表 16

图1 光伏储能型qZSI并网逆变器的系统结构

Fig.1 System structure of grid-connected PV energy storage qZSI

图2 储能型qZSI的两种工作状态电路

Fig.2 Circuit of two working states of energy storage qZSI

表1 光伏储能型qZSI并网系统的工作方式

Table 1 Working modes of grid-connected PV energy storage qZSI

图3 能量管理系统控制算法流程

Fig.3 Flow chart of control algorithm for energy management system

图4 φ 1 m i n随 γ 1的变化曲线

Fig.4 Graph of φ 1 m i n versus γ 1

图5 光伏储能型qZSI Lyapunov控制系统的整体结构

Fig.5 Overall structure of Lyapunov control system for PV energy storage qZSI

表2 系统实验参数

Table 2 Experimental parameters of the system

图6 正常稳态下储能型qZSI的Lyapunov控制波形

Fig.6 Lyapunov control curves of energy storage qZSI under normal steady state

图7 光照强度变化下储能型qZSI的Lyapunov控制波形

Fig.7 Lyapunov control curves of energy storage qZSI under light intensity change

图8 夜晚无光照情况下储能型qZSI的Lyapunov控制波形(系统工作方式4)

Fig.8 Lyapunov control curves of energy storage qZSI under no-light condition at night (system working mode 4)

图9 夜晚无光照情况下储能型qZSI的Lyapunov控制波形(系统工作方式5)

Fig.9 Lyapunov control curves of energy storage qZSI under no-light condition at night (system working mode 5)

图10 电网侧功率变化下储能型qZSI的Lyapunov控制波形

Fig.10 Lyapunov control curves of energy storage qZSI under grid power change

图11 在稳态工况下采用两种控制策略下储能型qZSI输出的三相电流THD

Fig.11 THD of three-phase output currents of energy storage qZSI with two control strategies under steady-state conditions

表3 稳态工况下两种控制策略下三相电流THD

Table 3 THD of three-phase currents with two control strategies under steady-state conditions

图12 动态工况下两种控制策略下储能型qZSI输出的有功功率

Fig.12 Active power of energy storage qZSI with two control strategies under dynamic conditions

表4 动态工况下两种控制策略下有功功率控制指标

Table 4 Active power control index with two control strategies under dynamic conditions

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基于Lyapunov控制策略的光伏储能型qZSI控制系统

Control System of Photovoltaic Energy Storage Quasi-Z-source Grid-connected Inverter Applying Lyapunov Control Strategy

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