[1]胡常胜.光伏并网逆变器的 VSG 转动惯量自适应控制方法[J].机械与电子,2024,42(05):36-40.
　HU Changsheng.VSG Moment of Inertia Adaptive Control Method for Photovoltaic Grid Connected Inverter[J].Machinery & Electronics,2024,42(05):36-40.
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光伏并网逆变器的 VSG 转动惯量自适应控制方法()
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《机械与电子》[ISSN:1001-2257/CN:52-1052/TH]

卷:
42
期数:
2024年05期
页码:
36-40
栏目:
自动控制与检测
出版日期:
2024-05-25

文章信息/Info

Title:
VSG Moment of Inertia Adaptive Control Method for Photovoltaic Grid Connected Inverter
文章编号:
1001-2257 ( 2024 ) 05-0036-05
作者:
胡常胜
国网阿克苏供电公司,新疆 阿克苏 843000
Author(s):
HU Changsheng
( State Grid Aksu Power Supply Company , Akesu 843000 , China )
关键词:
光伏并网; 阻尼系数; 逆变器; 自适应控制;  VSG 转动惯量
Keywords:
photovoltaic grid connection ;  damping coefficient ;  inverter ;  adaptive control ;  VSG moment of inertia
分类号:
TM464
文献标志码:
A
摘要:
虚拟同步发电机是光伏并网逆变器中控制电子变换器的主要设备,但易受光伏发电动态性能的影响,导致转动惯量的控制精度较低。为此,提出光伏并网逆变器的 VSG 转动惯量自适应控制方法。根据光伏并网逆变器的 VSG 结构,在联立同步发电机中生成 VSG 的稳态输出,获取功率输出对逆变器 VSG 的特性影响。通过计算转动惯量与逆变器频率波动之间的函数关系,得出阻尼系数和频率变化程度,根据角速度偏差及变化率的实时情况调整转动惯量,明确不同程度的负荷投切情况,获取高精度转动惯量自适应控制结果。实验结果表明,所提方法在输出的有功和无功功率比较中,在 0.26 s 内即可快速进入平稳状态,在 0.40 s 时转动惯量趋于稳定,表明该方法的功率控制效果好、可实现转动惯量的高精度控制。
Abstract:
The virtual synchronous generator is the main equipment for controlling the electronic converter in the photovoltaic grid connected inverter , but it is vulnerable to the impact of the dynamic performance of photovoltaic power generation , resulting in low control accuracy of the moment of inertia. Therefore , an adaptive control method of VSG moment of inertia for photovoltaic grid connected inverter is proposed.According to the VSG structure of photovoltaic grid connected inverter , the steady state output of VSG is generated in the synchronous generator , and the influence of power output on the characteristics of inverter VSG is obtained.By calculating the functional relationship between the moment of inertia and inverter frequency fluctuation , the damping coefficient and frequency change degree are obtained.The moment of inertia is adjusted according to the real-time situation of angular velocity deviation and change rate , and the load switching conditions of different degrees are determined to obtain high-precision adaptive control results of moment of inertia.The experimental results show that the proposed method can quickly enter a stable state in 0.26 s when comparing the output active power and reactive power , and the moment of inertia tends to be stable in 0.40 s , which proves that the power control effect of the method is good and the high-precision control of the moment of inertia can be achieved.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期: 2023-03-07
基金项目:国家重点研发计划( 2018YFB0904003 );国网新疆电力公司科技项目( SGXJDK00DJJS1800169 )
作者简介:胡常胜 ( 1979- ),男,新疆乌鲁木齐人,硕士,副高级工程师,研究方向为自动化控制。
更新日期/Last Update: 2024-06-24