Article(id=1192850379541988211, tenantId=1146029695717560320, journalId=1189987059142926344, issueId=1190985985849705466, articleNumber=null, orderNo=null, doi=10.19457/j.1001-2095.dqcd25708, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1710864000000, receivedDateStr=2024-03-20, revisedDate=1715184000000, revisedDateStr=2024-05-09, acceptedDate=null, acceptedDateStr=null, onlineDate=1762327292571, onlineDateStr=2025-11-05, pubDate=1747670400000, pubDateStr=2025-05-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1762327292571, onlineIssueDateStr=2025-11-05, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1762327292571, creator=13701087609, updateTime=1762327292571, updator=13701087609, issue=Issue{id=1190985985849705466, tenantId=1146029695717560320, journalId=1189987059142926344, year='2025', volume='55', issue='5', pageStart='3', pageEnd='96', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1761882786476, creator=13701087609, updateTime=1762390467120, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1193115352897909350, tenantId=1146029695717560320, journalId=1189987059142926344, issueId=1190985985849705466, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1193115352897909351, tenantId=1146029695717560320, journalId=1189987059142926344, issueId=1190985985849705466, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=20, endPage=26, ext={EN=ArticleExt(id=1192850379692983157, articleId=1192850379541988211, tenantId=1146029695717560320, journalId=1189987059142926344, language=EN, title=Control of Compressed Air Energy Storage System Grid-connected Inverter Based on LADRC, columnId=null, journalTitle=Electric Drive, columnName=null, runingTitle=null, highlight=null, articleAbstract=

Since the compressed air energy storage system grid-connected inverter voltage is always influenced by voltage fluctuations of the power grid with little problem,for the sake of ameliorating the dynamic and stable performance of the DC bus voltage of the inverter on the side of the grid and the actual output power of the system in the compressed air energy storage expansion power generation system and reducing the fluctuations,second-order linear active disturbance rejection control (LADRC) technique was used in the voltage outer loop control,a new-style double closed loop control construction was formed. The mathematical model of the grid-connected converter of expansion power generation system was established,the operating principle of LADRC was researched,and the conventional PI control was contrasted with the control methods studied. The simulation results indicate that when make a contrast with the conventional control methods,the control methods designed can make the DC voltage enter the stable state more quickly,the total harmonic distortion (THD) of the grid-connected current becomes smaller,and has better disturbance immunity.

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由于压缩空气储能系统并网逆变器电压容易受电网电压波动影响,因此为提高压缩空气储能膨胀发电系统中电网侧逆变器直流母线电压及系统实际输出功率的动态性能及稳定性,减小波动,将二阶线性自抗扰控制(LADRC)技术应用在网侧电压控制中,形成新型双闭环控制结构。建立了膨胀发电系统并网逆变器的数学模型,分析了LADRC的工作原理,并将传统的PI控制和所研究的控制策略作对比。仿真结果表明,设计的控制策略相较于PI控制可使直流侧电压更加迅速进入稳定状态,并网电流的总谐波畸变率(THD)变得更小,且具备更好的抗扰能力。

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李梦达(1980—),男,博士研究生,副教授,主要研究方向为可再生能源与分布式发电中的电力电子技术,Email:
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孙悦悦(1995—),女,硕士研究生,主要研究方向为电力系统控制与压缩空气储能技术,Email:

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孙悦悦(1995—),女,硕士研究生,主要研究方向为电力系统控制与压缩空气储能技术,Email:

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孙悦悦(1995—),女,硕士研究生,主要研究方向为电力系统控制与压缩空气储能技术,Email:

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journalId=1189987059142926344, articleId=1192850379541988211, language=CN, orderNo=4, keyword=线性自抗扰控制), Keyword(id=1193114876743741837, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1192850379541988211, language=CN, orderNo=5, keyword=抗扰能力)], refs=[Reference(id=1193114878895419819, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1192850379541988211, doi=null, pmid=null, pmcid=null, year=2023, volume=12, issue=6, pageStart=1840, pageEnd=1853, url=null, language=null, rfNumber=[1], rfOrder=0, authorNames=孙晓霞, 桂中华, 高梓玉, journalName=储能科学与技术, refType=null, unstructuredReference=孙晓霞, 桂中华, 高梓玉,等. 压缩空气储能系统动态运行特性[J]. 储能科学与技术, 2023, 12(6):1840-1853., articleTitle=压缩空气储能系统动态运行特性, refAbstract=null), Reference(id=1193114878949945772, tenantId=1146029695717560320, journalId=1189987059142926344, articleId=1192850379541988211, doi=null, pmid=null, pmcid=null, year=2023, volume=12, issue=6, pageStart=1840, pageEnd=1853, url=null, language=null, 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基于LADRC的压缩空气储能系统并网逆变器控制
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孙悦悦 , 李梦达 , 裴光耀 , 朱航航 , 宁晗
电气传动 | 电力电子 2025,55(5): 20-26
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电气传动 | 电力电子 2025, 55(5): 20-26
基于LADRC的压缩空气储能系统并网逆变器控制
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孙悦悦 , 李梦达 , 裴光耀, 朱航航, 宁晗
作者信息
  • 上海电机学院 电气学院,上海 201306
  • 孙悦悦(1995—),女,硕士研究生,主要研究方向为电力系统控制与压缩空气储能技术,Email:

通讯作者:

李梦达(1980—),男,博士研究生,副教授,主要研究方向为可再生能源与分布式发电中的电力电子技术,Email:
Control of Compressed Air Energy Storage System Grid-connected Inverter Based on LADRC
Yueyue SUN , Mengda LI , Guangyao PEI, Hanghang ZHU, Han NING
Affiliations
  • School of Electrical Engineering,Shanghai Dianji University,Shanghai 201306,China
出版时间: 2025-05-20 doi: 10.19457/j.1001-2095.dqcd25708
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由于压缩空气储能系统并网逆变器电压容易受电网电压波动影响,因此为提高压缩空气储能膨胀发电系统中电网侧逆变器直流母线电压及系统实际输出功率的动态性能及稳定性,减小波动,将二阶线性自抗扰控制(LADRC)技术应用在网侧电压控制中,形成新型双闭环控制结构。建立了膨胀发电系统并网逆变器的数学模型,分析了LADRC的工作原理,并将传统的PI控制和所研究的控制策略作对比。仿真结果表明,设计的控制策略相较于PI控制可使直流侧电压更加迅速进入稳定状态,并网电流的总谐波畸变率(THD)变得更小,且具备更好的抗扰能力。

压缩空气储能  /  并网逆变器  /  直流母线电压  /  线性自抗扰控制  /  抗扰能力

Since the compressed air energy storage system grid-connected inverter voltage is always influenced by voltage fluctuations of the power grid with little problem,for the sake of ameliorating the dynamic and stable performance of the DC bus voltage of the inverter on the side of the grid and the actual output power of the system in the compressed air energy storage expansion power generation system and reducing the fluctuations,second-order linear active disturbance rejection control (LADRC) technique was used in the voltage outer loop control,a new-style double closed loop control construction was formed. The mathematical model of the grid-connected converter of expansion power generation system was established,the operating principle of LADRC was researched,and the conventional PI control was contrasted with the control methods studied. The simulation results indicate that when make a contrast with the conventional control methods,the control methods designed can make the DC voltage enter the stable state more quickly,the total harmonic distortion (THD) of the grid-connected current becomes smaller,and has better disturbance immunity.

compressed air energy storage  /  grid-connected inverter  /  DC bus voltage  /  linear active disturbance rejection control (LADRC)  /  immunity to disturbance
孙悦悦, 李梦达, 裴光耀, 朱航航, 宁晗. 基于LADRC的压缩空气储能系统并网逆变器控制. 电气传动, 2025 , 55 (5) : 20 -26 . DOI: 10.19457/j.1001-2095.dqcd25708
Yueyue SUN, Mengda LI, Guangyao PEI, Hanghang ZHU, Han NING. Control of Compressed Air Energy Storage System Grid-connected Inverter Based on LADRC[J]. Electric Drive, 2025 , 55 (5) : 20 -26 . DOI: 10.19457/j.1001-2095.dqcd25708
随着各类可再生能源系统不断并网,越来越多的新型储能技术需被用于解决新能源并网产生的一系列问题[1]。目前,应用较多的储能技术种类有电池储能、压缩空气储能、飞轮储能以及抽水蓄能等。其中,压缩空气储能技术因具有无污染、效率较高、周期长、大容量储能且绿色环保的特点而被广泛应用[2-3],有较好的发展前景,继续研究压缩空气储能技术对促进智能电网发展具有重要意义[4]。在压缩空气储能膨胀发电系统中,并网逆变器的设计是整个系统控制的核心,是实现直流到交流转换的变换器,同时也是压缩空气储能膨胀发电机组与电网连接的主要装置。提高并网逆变器的控制性能有益于系统稳定运行,一般对其应用电压电流双闭环控制策略以稳定母线电压[5-8],系统构造简易。其中,电压电流双闭环PI控制策略在工程上有着广泛应用,但这种传统的控制方法会在一定程度上导致系统产生过大的超调量,并影响控制性能,使系统无法满足控制要求[9-10]
为使并网逆变器在压缩空气储能膨胀发电系统中具有更好的控制性能,国内外专家开始研究改进型控制策略以弥补传统控制策略中所存在的不足之处,达到更好的控制效果。文献[11]提出了采用改进模型预测控制的双闭环优化控制方法取代传统的PI双闭环控制,虽然采用该方法对直流侧母线电压的动态响应速度有所提高,但该控制策略的运用需要基于精确的数学模型,计算量较大。文献[12]通过电机负载信息重构直流母线电容电流,从而提高了直流侧电压的抗扰能力,但该方法容易受电机参数影响。文献[13]研究了一种基于前馈解耦的电压电流双闭环控制技术,虽然该方法可使输出电压快速进入稳定状态,但存在参数整定困难的情况。文献[14]提出了一种基于动态贝叶斯网络的模型预测控制的数据驱动方法,利用贝叶斯网络的预测能力来实现模型预测控制,该控制策略既能实现稳定的控制性能,又能实现鲁棒的控制性能,但会增加系统控制结构的复杂性。文献[15]将滑模控制法应用在电压外环上,同时电流内环增加电流预测的方法,该控制策略虽然能够减小网侧谐波影响并提高母线电压稳定性,但会使控制器结构变得更加复杂,难以实现。由此可见,工程上对各类控制技术的研究已经相对深入且应用也比较普遍,但各种控制技术在应用的过程中也存在一些弊端,因此继续对控制技术进行优化研究意义重大。
本文以压缩空气储能膨胀发电系统并网逆变器直流母线电压为控制对象,构造出基于LADRC的并网逆变器电压控制结构,替代了传统的PI控制技术。该控制策略可实现对扰动的观测与干扰补偿,从而有效提高直流侧电压的稳定性,同时使系统输出功率更加迅速且准确地追踪到需求功率的变化。
压缩空气储能膨胀发电系统结构如图1所示,采用膨胀机与直驱型永磁同步发电机直接相连并通过机侧整流器和网侧逆变器并入电网。机侧整流器控制可实现膨胀机以最佳转速运行;网侧逆变器控制则保证网侧输出功率可以迅速且准确地跟踪需求功率的变化,同时使母线电压保持稳定。
图2所示为膨胀发电系统并网逆变器结构图。图中,C为直流母线电容;IdcUdc分别为直流母线电流和电压;R为等效电阻;L为等效电感。
三相坐标系下并网逆变器数学模型为[16]
$\left\{\begin{array}{l}Ld{i}_{ga}/dt={e}_{ga}-R{i}_{ga}-{u}_{ga}\\ Ld{i}_{gb}/dt={e}_{gb}-R{i}_{gb}-{u}_{gb}\\ Ld{i}_{gc}/dt={e}_{gc}-R{i}_{gc}-{u}_{gc}\\ Cd{U}_{dc}/dt=\sum _{k=a,b,c}{S}_{k}{i}_{gk}-{i}_{s}\end{array}\right.$
式中:igaigbigc为网侧电流;ugaugbugc为逆变器三相电压;egaegbegc为网侧电压;is为负载电流。
其中
$S_{k}=\left\{\begin{array}{ll}1 \text { 上桥臂导通,下桥臂关断 } \\0 \text { 上桥臂关断,下桥臂导通 }\end{array} \quad k=a, b, c\right.$
d-q坐标系下并网逆变器数学模型为
$\left\{\begin{array}{l}Ld{i}_{gd}/dt={e}_{gd}-{u}_{gd}-R{i}_{gd}+\omega L{i}_{gq}\\ Ld{i}_{gq}/dt={e}_{gq}-{u}_{gq}-R{i}_{gq}-\omega L{i}_{gd}\\ Cd{U}_{dc}/dt=\frac{3}{2}\sum _{x=d,q}{S}_{x}{i}_{gx}-{i}_{s}\end{array}\right.$
式中:egdegq为网侧电压的dq轴分量;ugdugq为逆变器电压的dq轴分量;igdigq为网侧电流的dq轴分量;ω为电网角频率;Sx为开关函数的dq轴分量。
并网逆变器电压定向矢量控制通常由电压外环和电流内环构成[17]图3所示为α-β和d-q坐标系下电压电流向量图,E为电网电压空间矢量,则${e}_{gd}=\left|E\right|$,egq=0。
由于igdigq在稳态情况下为直流,则微分项为零,因此由式(3)可得:
$\left\{\begin{array}{l}{u}_{gd}={e}_{gd}-R{i}_{gd}+\omega L{i}_{gq}\\ {u}_{gq}=-R{i}_{gq}-\omega L{i}_{gd}\end{array}\right.$
对于双闭环控制模型可将电压外环的输出值用作电流内环有功电流的设定值,使直流母线电压保持稳定,将无功电流设为零以完成单位功率因数并网[18]。可得输出控制方程为
$\left\{\begin{array}{l}{u}_{gd}=-({K}_{iP}+{K}_{iI}/s)({i}_{dref}-{i}_{gd})+\omega L{i}_{gq}+{e}_{gd}\\ {u}_{gq}=-({K}_{iP}+{K}_{iI}/s)({i}_{qref}-{i}_{gq})-\omega L{i}_{gd}+{e}_{gq}\end{array}\right.$
式中:KiPKiI为电流内环的比例系数和积分系数;idrefiqref为内环d轴和q轴设定值。
将式(5)代入式(3)得:
$\left\{\begin{array}{l}\frac{d{i}_{gd}}{dt}=({K}_{iP}+{K}_{iI}/s)({i}_{dref}-{i}_{gd})-\frac{R}{L}{i}_{gd}\\ \frac{d{i}_{gq}}{dt}=({K}_{iP}+{K}_{iI}/s)({i}_{qref}-{i}_{gq})-\frac{R}{L}{i}_{gq}\end{array}\right.$
由式(6)可知,d轴和q轴输出电流完成了解耦控制[19]
压缩空气储能系统并网时需实时检测电网电压矢量的相位,而锁相环技术可使输出信号在频率及相位上同电网电压矢量保持一致。由于电网变化具有不可控性,因此选择性能较好的锁相环为系统提供准确的电网电压矢量同步信号至关重要。
单同步坐标系锁相环(single synchronous refe-rence frame phase-locked loop,SSRF-PLL)是一种较为典型的锁相环技术。SSRF-PLL矢量图如图4所示,Us为实际电压矢量,UPLL为锁相环输出电压矢量,θ为实际电压矢量角度,θ'为锁相环输出电压矢量角度。
当电网电压相位突变时,矢量UPLLUs将无法保持在同一位置,因此需设计合适的闭环控制使θ'。SSRF-PLL的控制结构如图5所示。ω0UPLL的旋转角速度。
自抗扰控制技术可对总扰动进行估计并补偿[20],参数整定简易。LADRC结构图如图6所示,LESO为线性扩张状态观测器;LSEF为线性状态误差反馈控制率;z1,z2,z3为LESO的三个状态变量;v为参考输入;y为控制输出;b0为控制器增益;u为控制量。
假设有二阶系统为
$\ddot{y}=f(y,\dot{y},w,t)=-{a}_{1}\dot{y}-{a}_{2}y+w+bu$
式中:w为未知扰动;a1,a2为未知系统参数;b为控制增益。
b0b的已知部分,式(7)可改为
$\ddot{y}=-{a}_{1}\dot{y}-{a}_{2}y+w+(b-{b}_{0})u=f+{b}_{0}u$
式中: f为不确定的总扰动。
令x1=y,${x}_{2}=\dot{y}$,x3=f,因此式(8)可改为
$\left\{\begin{array}{l}{\dot{x}}_{1}={x}_{2}\\ {\dot{x}}_{2}={x}_{3}+{b}_{0}u\\ {\dot{x}}_{3}=h\\ y={x}_{1}\end{array}\right.$
由式(9)可构建三阶LESO:
$\left\{\begin{array}{l}{\dot{z}}_{1}={z}_{2}-{\beta }_{1}({z}_{1}-y)\\ {\dot{z}}_{2}={z}_{3}-{\beta }_{2}({z}_{1}-y)+{b}_{0}u\\ {\dot{z}}_{3}=-{\beta }_{3}({z}_{1}-y)\end{array}\right.$
式中:β1,β2,β3为观测器增益,β1=3ω0${\beta }_{2}=3{\omega }_{0}^{2}$${\beta }_{3}={\omega }_{0}^{3}$;ω0为观测器带宽;hf的微分。
取系统的控制量为
$u=\frac{-{z}_{3}+{u}_{0}}{{b}_{0}}$
忽略z3f的估计误差,则
$\ddot{y}=f-{z}_{3}+{u}_{0}\approx {u}_{0}$
二阶线性自抗扰控制器可设计为
$u_{0}=k_{\mathrm{p}}\left(v-z_{1}\right)-k_{\mathrm{d}} z_{2}$
式中:kpkd为控制器参数,${k}_{p}={\omega }_{c}^{2}$,kd=2ωcωc为控制器带宽。
由式(10)可得LESO的特征方程为
$s^{3}+\beta_{1} s^{2}+\beta_{2} s+\beta_{3}=0$
将极点配置在-ω0处,则式(14)可变为
$s^{3}+\beta_{1} s^{2}+\beta_{2} s+\beta_{3}=\left(s+\omega_{0}\right)^{3}=0$
因此ω0为唯一需要整定的参数。由式(13)可得特征方程为
$s^{2}+k_{\mathrm{d}} s+k_{\mathrm{p}}=\left(s+\omega_{\mathrm{c}}\right)^{2}=0$
将极点配置在-ωc处,则唯一需要整定的参数是ωc
LESO是LADRC控制器的核心部分,式(3)可转化为
$\begin{array}{l}    \frac{{d}^{2}{U}_{dc}}{d{t}^{2}}=\frac{3}{2LC}\sum _{x=d,q}({S}_{x}{e}_{gx}-{S}_{x}{i}_{x}R)+\\ \frac{3\omega }{2C}({S}_{d}{i}_{gq}-{S}_{q}{i}_{gd})-\frac{3}{2LC}\sum _{x=d,q}{S}_{x}{u}_{gx}\end{array}$
将式(17)转化为状态空间方程为
$\left\{\begin{array}{l}\left[\begin{array}{c}{\dot{x}}_{1}\\ {\dot{x}}_{2}\\ {\dot{x}}_{3}\end{array}\right]=\left[\begin{array}{ccc}0& 1& 0\\ 0& 0& 1\\ 0& 0& 0\end{array}\right]\left[\begin{array}{c}{x}_{1}\\ {x}_{2}\\ {x}_{3}\end{array}\right]+\left[\begin{array}{cc}0& 0\\ {b}_{0}& 0\\ 0& 1\end{array}\right]\left[\begin{array}{c}u\\ h\end{array}\right]\\ y={x}_{1}\end{array}\right.$
其中
y=Udc
结合式(10)和式(19)可得电压外环的三阶LESO为
$\left\{\begin{array}{l}{\dot{z}}_{1}={z}_{2}-3{\omega }_{0}({z}_{1}-{U}_{dc})\\ {\dot{z}}_{2}={z}_{3}-3{\omega }_{0}^{2}({z}_{1}-{U}_{dc})+{b}_{0}u\\ {\dot{z}}_{3}=-{\omega }_{0}^{3}({z}_{1}-{U}_{dc})\end{array}\right.$
当ω0已整定时,z1收敛于直流母线电压Udc,z2收敛于Udc的微分,z3收敛于总扰动f
图7为基于LADRC的逆变器控制结构,Udcref为给定电压;UαUβ为αβ坐标系下参考电压;θ为a相与d轴间的角度。
为验证本文设计的基于二阶LADRC的压缩空气储能膨胀发电系统并网逆变器电压控制效果优于采用传统PI控制器的效果,搭建了仿真模型。分别在网侧需求功率不变和网侧需求功率变化的两种情况下将两种控制方式下膨胀发电系统并网逆变器直流侧母线电压的控制效果进行比较。控制器参数如下:控制器带宽ωc=20 000,观测器带宽ω0=40 000,控制增益b0=3.8×109。系统主要参数如下:额定功率110 kW,网侧线电压380 V,基频50 Hz,直流母线电压1 000 V,直流母线电容7 000 μF,网侧电阻0.000 01 Ω,网侧电感6 mH。
设定压缩空气储能膨胀发电系统在网侧需求功率保持110 kW不变时,分别采用二阶LADRC和传统的PI控制方法进行并网逆变器母线电压控制,其他条件均不变,进行仿真验证。
图8为需求功率不变时直流侧母线电压在PI及LADRC控制下的波形图。由仿真图可见,由PI控制的逆变器母线电压在进入稳态之前超调量达到了5.8%,大概在0.12 s进入稳态,即直流侧母线电压恢复到额定电压1 000 V。由二阶LADRC控制的逆变器母线电压在进入稳态前最大超调量仅为1%,大概在0.05 s便进入稳态。由此可见,采用二阶LADRC控制的直流母线电压相较于PI控制的电压超调量更小,稳态精度更高。
图9为需求功率不变时系统输出功率在PI及LADRC控制下的波形图。由仿真图可见,由PI控制器进行电压外环控制的输出功率曲线超调量高于采用二阶LADRC控制器进行电压外环控制的输出功率曲线的超调量,大概在0.12 s进入稳态,即输出功率达到需求功率110 kW。由二阶LADRC控制器进行电压外环控制的输出功率曲线大概在0.1 s进入稳态。由此可见,采用二阶LADRC控制的输出功率相较于PI控制的输出功率超调量更小,达到稳态所需时间更短。
图10为PI和LADRC控制下a相并网电流的谐波分析对比图。由仿真图可见,采用二阶LADRC控制可抑制并网电流的谐波,并网电流的总谐波畸变率(THD)由3.12%降至1.05%,可使输出的正弦波形更饱满,提升了并网的电能质量。
图11为需求功率不变时电网电流在PI及LADRC控制下的对比图。采用LADRC控制策略时,电网电流仅需0.03 s可进入稳定状态,比PI控制策略响应速度快0.04 s,且抗扰能力要优于PI控制策略。
设定压缩空气储能膨胀发电系统在网侧需求功率分别在0.4 s与0.7 s发生变化,由110 kW下降至85 kW再上升至98 kW时,采用LADRC及PI控制器分别进行电压外环控制,其他条件均不变,进行仿真验证。
图12为需求功率变化时直流侧母线电压在PI及LADRC控制下的波形图。由仿真图可见,当电网需求功率在0.4 s和0.7 s发生变化时,逆变器母线电压会相应发生扰动。当采用PI控制时,电压在0.4 s和0.7 s发生波动后需在0.1 s内恢复到额定电压1 000 V,且进入稳态前超调量达到了5.8%。当采用二阶LADRC控制时,电压在0.4 s和0.7 s发生波动后仅在0.08 s内便恢复到额定电压,且进入稳态前超调量为1%。由此可见,在网侧需求功率变化的情况下采用二阶LADRC控制相较于PI控制直流母线电压超调量更小,且稳态精度更高。
图13为需求功率变化时系统输出功率在PI及LADRC控制下的波形图。由仿真图可见,当电网需求功率在0.4 s和0.7 s发生改变时,系统输出功率会跟随需求功率做出相应的变化。当采用PI控制时,系统输出功率曲线在0.4 s和0.7 s发生相应的变化后,需在0.1 s内跟踪到需求功率的变化值,且超调量高于采用二阶LADRC控制时输出功率曲线的超调量。采用二阶LADRC控制时,系统输出功率在0.4 s和0.7 s发生相应的变化后仅0.08 s内便追踪到需求功率的变化值。由此可见,在网侧需求功率变化的情况下采用二阶LADRC控制相较于PI控制系统输出功率超调量更小,且可以更加迅速准确地追踪到需求功率的变化值。
图14为需求功率变化时电网电流在PI及LADRC控制下的对比图。当电网需求功率在0.4 s和0.7 s发生变化时,电网电流会同时发生扰动。采用LADRC控制策略时,电网电流可在0.04 s内进入新的稳态,比PI控制策略快0.03 s,控制效果更佳。
由于采用传统的PI控制器对压缩空气储能膨胀发电系统并网逆变器进行控制时会出现直流侧母线电压超调量较大且进入稳态速度较慢等现象,因此本文设计了基于LADRC的控制结构。仿真对比结果表明,本文所设计的控制方式无论在网侧需求功率保持不变还是变化的情况下均可明显提高系统的响应速度,减小直流侧母线电压的波动,使系统输出功率可迅速且准确地追踪到需求功率的变化,降低并网电流的谐波,提高电能质量。本文设计的二阶LADRC控制器对压缩空气储能膨胀发电系统并网逆变器的控制效果显著,具有重要意义。
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2025年第55卷第5期
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doi: 10.19457/j.1001-2095.dqcd25708
  • 接收时间:2024-03-20
  • 首发时间:2025-11-05
  • 出版时间:2025-05-20
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  • 收稿日期:2024-03-20
  • 修回日期:2024-05-09
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教育部重点实验室开放基金项目(NEPUME-kfjj-026)
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    上海电机学院 电气学院,上海 201306

通讯作者:

李梦达(1980—),男,博士研究生,副教授,主要研究方向为可再生能源与分布式发电中的电力电子技术,Email:
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