电源学报

弱电网下提高并网逆变器稳定性的Ⅰ型和准Ⅰ型锁相环方法

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胡雪凯 ¹ , 孟良 ¹ , 姬朋坤中国电源学会学生会员 ² , 肖国春中国电源学会高级会员 ² , 高子鹏中国电源学会学生会员 ² , 肖霖涛中国电源学会学生会员 ²

电源学报 | 新能源发电与储能 2026,24(5): 77-87

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电源学报 |新能源发电与储能 2026 , 24 (5) : 77 -87

弱电网下提高并网逆变器稳定性的Ⅰ型和准Ⅰ型锁相环方法

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胡雪凯¹, 孟良¹, 姬朋坤中国电源学会学生会员², 肖国春中国电源学会高级会员², 高子鹏中国电源学会学生会员², 肖霖涛中国电源学会学生会员²

作者信息

^1.国网河北省电力有限公司电力科学研究院，石家庄　050021

^2.西安交通大学电气工程学院，西安　710049

通讯作者:

姬朋坤（1998—　），男，中国电源学会学生会员，通信作者，硕士研究生。研究方向：新能源并网逆变器建模及稳定性分析。E-mail：jpengkun1@163.com。

作者简介:

胡雪凯（1987—　），男，硕士，高级工程师。研究方向：新能源并网调控，分布式电源并网控制。E-mail：719872361@qq.com。

孟良（1985—　），男，硕士，高级工程师。研究方向：电力电子装置控制，分布式电源并网控制。E-mail：15133128069@139.com。

肖国春（1965—　），男，中国电源学会高级会员，博士，教授。研究方向：分布式发电及电力电子系统建模。E-mail：xgc@mail.xjtu.edu.cn。

高子鹏（1998—　），男，中国电源学会学生会员，硕士研究生。研究方向：新能源并网系统建模与稳定性分析。E-mail：g_zipeng@163.com。

肖霖涛（1998—　），男，中国电源学会学生会员，硕士研究生。研究方向：新能源并网控制与稳定性分析。E-mail：ltxiao98@163.com。

Methods of Type-I and Quasi-type-I Phase-locked Loops for Enhancing the Stability of Grid-connected Inverters Under Weak Grids

Xuekai HU¹, Liang MENG¹, Pengkun JI Student Member, CPSS², Guochun XIAO Senior Member, CPSS², Zipeng GAO Student Member, CPSS², Lintao XIAO Student Member, CPSS²

Affiliations

^1.State Grid Hebei Electric Power Research Institute, Shijiazhuang 050021, China

^2.School of Electrical Engineering, Xi’an Jiaotong University, Xi'an 710049, China

出版时间: 2026-05-30 doi: 10.13234/j.issn.2095-2805.2026.5.77

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摘要

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弱电网下，并网逆变器GCI（grid-connected inverter）常采用的Ⅱ型锁相环PLL（phase-locked loop）系统易与电网阻抗交互，从而产生低频振荡的失稳问题。传统的解决方法是通过降低Ⅱ型PLL的带宽来提高GCI运行的稳定性，但这样会使锁相环动态性能下降，也较难适应电网阻抗的宽范围变化。为此，提出将传统Ⅱ型PLL降为Ⅰ型PLL，在不降低PLL动态性能的同时，较大幅度地提高了GCI在弱电网下的稳定性；进一步，针对电网频率波动大时，Ⅰ型PLL存在不可忽略锁相误差的问题，提出了一种（角）频率自适应前馈方法，将Ⅰ型PLL改进为准Ⅰ型PLL，消除了相位跟踪误差，提高了弱电网下并网逆变器的稳定性和动态性能。最后，通过仿真和实验验证了所提方法的正确性和有效性。

关键词

弱电网 / 并网逆变器 / 稳定性 / Ⅰ型锁相环 / 准Ⅰ型锁相环

Abstract

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Under weak grid conditions, the grid-connected inverter (GCI) commonly employs a type-II Phase-Locked Loop (PLL) system, which is prone to interaction with the grid impedance, leading to instability issues characterized by low-frequency oscillations. A traditional solution aimed at enhancing GCI stability by reducing the type-II PLL's bandwidth. However, this approach compromises the dynamic performance of the PLL and its adaptability to a wide range of grid impedance variations. To address this, the traditional Type-II PLL was replaced by Type-I PLL, significantly improving the stability of GCI in weak grids without degrading the PLL's dynamic performance. Furthermore, to tackle the phase-locking error issue in type-I PLLs during significant grid frequency fluctuations, an adaptive feedforward method for frequency control is introduced. This enhancement transforms the type-I PLL into a quasi-type-I PLL, eliminating phase tracking errors and enhancing the stability and dynamic performance of GCI in weak grid environments. Both simulation and experimental results confirm the validity and efficacy of the proposed methods.

Key words

Weak grid / grid-connected inverter / stability / type-I PLL / quasi-type-I PLL

引用本文

胡雪凯, 孟良, 姬朋坤中国电源学会学生会员, 肖国春中国电源学会高级会员, 高子鹏中国电源学会学生会员, 肖霖涛中国电源学会学生会员. 弱电网下提高并网逆变器稳定性的Ⅰ型和准Ⅰ型锁相环方法. 电源学报, 2026 , 24 (5) : 77 -87 . DOI: 10.13234/j.issn.2095-2805.2026.5.77

Xuekai HU, Liang MENG, Pengkun JI, Guochun XIAO, Zipeng GAO, Lintao XIAO. Methods of Type-I and Quasi-type-I Phase-locked Loops for Enhancing the Stability of Grid-connected Inverters Under Weak Grids[J]. Journal of Power Supply, 2026 , 24 (5) : 77 -87 . DOI: 10.13234/j.issn.2095-2805.2026.5.77

基金

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国家电网有限公司科技资助项目(TSS2022-09)

参考文献

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2026年第24卷第5期

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doi: 10.13234/j.issn.2095-2805.2026.5.77

接收时间：2024-04-18
首发时间：2026-10-29
出版时间：2026-05-30

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收稿日期：2024-04-18
修回日期：2024-05-20
录用日期：2024-06-02

基金

State Grid Corporation of China(TSS2022-09)

国家电网有限公司科技资助项目(TSS2022-09)

作者信息

^1.国网河北省电力有限公司电力科学研究院，石家庄　050021

^2.西安交通大学电气工程学院，西安　710049

通讯作者:

姬朋坤（1998—　），男，中国电源学会学生会员，通信作者，硕士研究生。研究方向：新能源并网逆变器建模及稳定性分析。E-mail：jpengkun1@163.com。

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https://castjournals.cast.org.cn/joweb/dyxb/CN/10.13234/j.issn.2095-2805.2026.5.77

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2种不同金属材料的力学参数

科 Family	属数 Number of genus	种数 Number of species	占总种数比例 Percentage of total species (%)	属 Genus	种数 Number of species	占总种数比例 Percentage of total species (%)
鹅膏菌科Amanitaceae	2	11	5.26	鹅膏菌属 Amanita	10	4.78
小菇科 Mycenaceae	2	12	5.74	丝盖伞属 Inocybe	5	2.39
多孔菌科 Polyporaceae	8	14	6.70	蜡蘑属 Laccaria	5	2.39
红菇科 Russulaceae	3	23	11.00	小皮伞属 Marasmius	6	2.87
				小菇属 Mycena	11	5.26
				光柄菇属 Pluteus	5	2.39
				红菇属 Russula	17	8.13
				栓菌属 Trametes	5	2.39

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