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1.国家电能变换与控制工程技术研究中心(湖南大学),湖南省长沙市 410082
2.长沙理工大学电气与信息工程学院,湖南省长沙市 410004
3.国网安徽省电力有限公司电力科学研究院,安徽省合肥市 230000
贾文慧(1998—),女,硕士研究生,主要研究方向:电力电子在电力系统中的应用。E-mail:963064945@qq.com
郭祺(1993—),男,通信作者,博士,副研究员,主要研究方向:电力电子变换器、分布式发电与电能质量先进控制。E-mail:qguo_215@163.com
涂春鸣(1976—),男,博士,教授,博士生导师,主要研究方向:电网新型调控技术与装备、分布式能源与微能源网、电能质量与高效利用。
收稿:2022-04-22,
修回:2022-08-19,
网络出版:2022-10-27,
纸质出版:2023-01-10
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贾文慧,郭祺,涂春鸣等.集成电压补偿与无功支撑能力的并网变换器拓扑优化及控制[J].电力系统自动化,2023,47(1):153-161.
JIA Wenhui,GUO Qi,TU Chunming,et al.Topology Optimization and Control of Grid-connected Converter with Integrated Voltage Compensation and Reactive Power Support Capability[J].Automation of Electric Power Systems,2023,47(1):153-161.
贾文慧,郭祺,涂春鸣等.集成电压补偿与无功支撑能力的并网变换器拓扑优化及控制[J].电力系统自动化,2023,47(1):153-161. DOI: 10.7500/AEPS20220422008.
JIA Wenhui,GUO Qi,TU Chunming,et al.Topology Optimization and Control of Grid-connected Converter with Integrated Voltage Compensation and Reactive Power Support Capability[J].Automation of Electric Power Systems,2023,47(1):153-161. DOI: 10.7500/AEPS20220422008.
针对传统串联型电能质量治理装置利用率较低、可靠性较差,而并联型电能质量治理装置解决电压波动问题的能力有待进一步提升的问题,提出了一种集成电压支撑与无功调控能力的多功能并网变换器(MF-GCC)。电网电压波动时,MF-GCC工作于串联接入模式,实现电压调节功能。电网电压正常时,MF-GCC工作于并联接入模式,实现网侧单位功率因数运行。与传统串联接入型电能质量治理装置相比,MF-GCC仅多了一个开关和一个耦合电容,即可实现串联和并联接入型电能质量治理装置功能的有效集成。此外,在系统故障时,MF-GCC有源部分的端口电压钳位为零,故障电流被遏制,MF-GCC自身及其接入电网的可靠性均得到了提升。文中详细分析了MF-GCC的拓扑结构、工作原理、控制策略及参数设计。仿真与实验结果验证了所提拓扑结构与控制策略的有效性和可行性。
Aiming at the low utilization rate and poor reliability of the traditional series-connected power quality control device
and the ability of the parallel-connected power quality control device to solve the voltage fluctuation problem needs to be further improved
a multi-function grid-connected converter (MF-GCC) with integrated voltage support and reactive power regulation capability is proposed. When the grid voltage fluctuates
the MF-GCC works in the series access mode to realize the voltage regulation function. When the grid voltage is normal
the MF-GCC works in the parallel access mode to achieve the unit power factor operation on the grid side. Compared with the traditional series-connected power quality control device
the MF-GCC only has one more switch and one more coupling capacitor
which can realize the effective integration of the functions of series-connected and parallel-connected power quality control device. In addition
when the system fails
the port voltage of the active part in the MF-GCC is clamped to zero and the fault current is limited. Thus the reliability of the MF-GCC itself and its connection to grid is fully improved. This paper analyzes the topology structure
working principle
control strategy and parameter design of MF-GCC in detail. Simulation and experimental results verify the effectiveness and feasibility of the proposed topology and control strategy.
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