CN109066665B - 一种基于微网信息流的数据分析故障诊断方法 - Google Patents

一种基于微网信息流的数据分析故障诊断方法 Download PDF

Info

Publication number
CN109066665B
CN109066665B CN201811036398.9A CN201811036398A CN109066665B CN 109066665 B CN109066665 B CN 109066665B CN 201811036398 A CN201811036398 A CN 201811036398A CN 109066665 B CN109066665 B CN 109066665B
Authority
CN
China
Prior art keywords
voltage
microgrid
current
reactive power
power plant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201811036398.9A
Other languages
English (en)
Other versions
CN109066665A (zh
Inventor
张铁岩
左浩
滕云
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenyang University of Technology
Original Assignee
Shenyang University of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenyang University of Technology filed Critical Shenyang University of Technology
Priority to CN201811036398.9A priority Critical patent/CN109066665B/zh
Publication of CN109066665A publication Critical patent/CN109066665A/zh
Application granted granted Critical
Publication of CN109066665B publication Critical patent/CN109066665B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2203/00Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/20Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/001Methods to deal with contingencies, e.g. abnormalities, faults or failures

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Eletrric Generators (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

本发明提出一种基于微网信息流的数据分析故障诊断方法,流程包括:采集微网内的光伏电站,风电场,热电厂,电池储能,电储热装置的数据;计算对应的影响因子;计算微网换流站无功功率消耗;计算风电场与换流站间无功功率;对微网线路进行故障判断,包括短路判断和微网内过电压故障判断;本发明根据当前微网内光伏电站,风电场,热电厂,电池储能,电储热装置的运行状态,进行相应的数据检测后,根据微网内数据的大小进行相应计算,根据计算结果能够准确判断微网的运行状态,判断微网内是否出现短路,过电压等故障现象,能够及时作出反应应对故障现象的发生。

Description

一种基于微网信息流的数据分析故障诊断方法
技术领域
本发明属于电网技术领域,具体涉及一种基于微网信息流的数据分析故障诊断方法。
背景技术
微电网由分布电源、储能装置、控制转换装置和负荷等组成。由于微电网在孤岛运行时对电能质量要求较高,为保证微电网的安全稳定运行必须对微网内的运行数据进行实时监测,判断微网的运行情况,微网中主要出现的异常异常情况有微网中电子元件产生的谐波干扰及配网的谐波传递干扰;微网中非线性负荷产生谐波;微网的运行和控制方式不符合要求;微网中电源启停及电源出力不均匀;配网各种暂态变化及其他扰动(如雷电侵入);微网中存在多个并网逆变器,各自参数不同,使得输出电压差异形成环流;微网的储能设备配置。而微网电能质量的检测、分析和控制相对传统大电网更加复杂和困难。为了更好地改善微网的电能质量,让微网更加安全稳定运行,进行如下发明。
发明内容
针对以上技术问题,本发明提出一种基于微网信息流的数据分析故障诊断方法,具体包括如下流程:
步骤1、采集微网内的光伏电站,风电场,热电厂,电池储能,电储热装置的数据,包括:光伏电站当前工作输出电压U1,以及当前输出电流I1;风电场当前工作时的电压输出U2,以及当前输出电流I2;热电厂当前工作的输出电压U3,以输出电流I3;电池储能装置当前工作的额定电压输出U4,以及输出电流I4;电储热装置当前输入电压U5,以及当前输入电流I5
步骤2、计算影响因子、风电机组发出无功功率和微网换流站无功功率消耗,包括步骤2.1~步骤2.3,步骤2.1~步骤2.3不分先后顺序:
步骤2.1、对微网内的光伏电站,风电场,热电厂,电池储能,电储热装置额定电压,电流进行如下方法计算,得到对应的影响因子cn,n=1…5:
Figure BDA0001790979690000011
Figure BDA0001790979690000012
Figure BDA0001790979690000013
Figure BDA0001790979690000021
Figure BDA0001790979690000022
步骤2.2、计算风电机组发出无功功率Qr,公式如下:
Qr=Qxrσ+s(Qe+Qxsσ+Qs) (6)
其中,Qs为定子无功功率,Qxsσ为定子漏感消耗的无功功率,Qxrσ为转子漏感消耗的无功功率,Qe为气隙励磁功率,s为转差率;
步骤2.3、计算微网换流站无功功率消耗Qdc,公式如下:
Figure BDA0001790979690000023
式中,
Figure BDA0001790979690000024
其中,Pdc为换流器直流侧功率;
Figure BDA0001790979690000025
为换流器的功率因素角;Xc为每相换相电抗;μ为换相位;Id为直流运行电流;U11为换流变压器阀侧绕组空载电压有效值;α为整流器触发角;Ud为直流电压;Udio为理想空载电压,Udio等于U11
Figure BDA0001790979690000026
倍。
步骤3、计算风电场与换流站间无功功率Qpd,公式如下
Figure BDA0001790979690000027
步骤4、对微网线路进行故障判断,短路判断,微网内过电压故障判断:
短路判断:使用如下公式计算短路参数:
m1=ln(c1+c2+c3+c4+c5)2 (10)
若m1>400则线路正常,若m1≤400则线路发生短路;
电压故障判断:使用如下公式计算电压故障参数:
m2=ln(c1+c2+c3+c4+c5)2+ln Qpd (11)
若m2≤3则线路发生欠电压,若3<m2≤5则线路正常,m2>5则发生过电压现象。
有益技术效果:
本发明根据当前微网内光伏电站,风电场,热电厂,电池储能,电储热装置的运行状态,进行相应的数据检测后,根据微网内数据的大小进行相应计算,根据计算结果能够准确判断微网的运行状态,判断微网内是否出现短路,过电压等故障现象,能够及时作出反应应对故障现象的发生。
附图说明
图1为本发明实施例的一种基于微网信息流的数据分析故障诊断方法流程图;
具体实施方式
实施例1:
下面结合附图和具体实施例1对发明做进一步说明,本发明提出一种基于微网信息流的数据分析故障诊断方法,如图1所示,具体流程如下,其中,步骤2、步骤3、步骤4不分先后顺序:
步骤1、采集微网内的光伏电站,风电场,热电厂,电池储能,电储热装置的数据,包括:光伏电站当前工作输出电压U1=10kV,以及当前输出电流I1=100A;风电场当前工作时的电压输出U2=10kV,以及当前输出电流I2=100A;热电厂当前工作的输出电压U3=10kV,以输出电流I3=100A;电池储能装置当前工作的额定电压输出U4=380V,以及输出电流I4=20A;电储热装置当前输入电压U5=380V,以及当前输入电流I5=20A;
步骤2、计算影响因子、风电机组发出无功功率和微网换流站无功功率消耗,包括步骤2.1~步骤2.3,步骤2.1~步骤2.3不分先后顺序:
步骤2.1、对微网内的光伏电站,风电场,热电厂,电池储能,电储热装置额定电压,电流进行如下方法计算,得到对应的影响因子cn,n=1…5:
Figure BDA0001790979690000031
Figure BDA0001790979690000032
Figure BDA0001790979690000033
Figure BDA0001790979690000041
Figure BDA0001790979690000042
步骤2.2、对微网内风电场无功功率进行检测,由于微网内双馈同步风电机组为重要的无功源,在稳定电网电压和无功补偿方面需发挥应有的作用,所以对风电机组发出无功进行判断,计算风电机组发出无功功率Qr,公式如下:
Qr=Qxrσ+s(Qe+Qxsσ+Qs) (6)
其中,定子无功功率Qs=1000var,定子漏感消耗的无功功率Qxsσ=100var,转子漏感消耗的无功功率Qxrσ=80var,气隙励磁功率Qe=60var,转差率s=0.04。
计算得Qr=Qxrσ+s(Qe+Qxsσ+Qs)=80+0.04(1000+100+60)=126.4var
步骤2.3、计算微网换流站无功功率消耗Qdc,公式如下:
Figure BDA0001790979690000043
式中,
Figure BDA0001790979690000044
其中,换流器直流侧功率Pdc为1MW;换流器的功率因素角φ=0.8为;每相换相电抗Xc=800;μ为换相位;直流运行电流Id=20A;换流变压器阀侧绕组空载电压有效值U11=380V;整流器触发角α为30度;直流电压Ud为300V;Udio为理想空载电压,等于U11
Figure BDA0001790979690000045
倍。
计算得Qdc=824var。
步骤3、计算风电场与换流站间无功功率Qpd,计算结果如下:
Figure BDA0001790979690000046
步骤4、对微网线路进行故障判断,短路判断,微网内过电压故障判断:
短路判断,m1=(c1+c2+c3+c4+c5)2=422.7;
电压故障判断m2=lg(c1+c2+c3+c4+c5)2+lnQpd=4.9;
所以线路属于正常运行状态。
实施例2:
下面结合附图和具体实施例2对发明做进一步说明,本发明提出一种基于微网信息流的数据分析故障诊断方法,如图1所示,具体流程如下,其中步骤2、步骤3、步骤4不分先后顺序:
步骤1、采集微网内的光伏电站,风电场,热电厂,电池储能,电储热装置的数据,包括:光伏电站当前工作输出电压U1=10.9kV,以及当前输出电流I1=104A;风电场当前工作时的电压输出U2=10kV,以及当前输出电流I2=100A;热电厂当前工作的输出电压U3=10kV,以输出电流I3=100A;电池储能装置当前工作的额定电压输出U4=380V,以及输出电流I4=20A;电储热装置当前输入电压U5=380V,以及当前输入电流I5=20A;
步骤2、计算影响因子、风电机组发出无功功率和微网换流站无功功率消耗,包括步骤2.1~步骤2.3,步骤2.1~步骤2.3不分先后顺序:
步骤2.1、对微网内的光伏电站,风电场,热电厂,电池储能,电储热装置额定电压,电流进行如下方法计算,得到对应的影响因子cn,n=1…5:
Figure BDA0001790979690000051
Figure BDA0001790979690000052
Figure BDA0001790979690000053
Figure BDA0001790979690000054
Figure BDA0001790979690000055
步骤2.2、对微网内风电场无功功率进行检测,由于微网内双馈同步风电机组为重要的无功源,在稳定电网电压和无功补偿方面需发挥应有的作用,所以对风电机组发出无功进行判断,计算风电机组发出无功功率Qr,公式如下:
Qr=Qxrσ+s(Qe+Qxsσ+Qs) (6)
其中,定子无功功率Qs=1100var,定子漏感消耗的无功功率Qxsσ=100var,转子漏感消耗的无功功率Qxrσ=80var,气隙励磁功率Qe=60var,转差率s=0.04。
Qr=Qxrσ+s(Qe+Qxsσ+Qs)=80+0.04(1100+100+60)=132.4var
步骤2.3、计算微网换流站无功功率消耗Qdc,公式如下:
Figure BDA0001790979690000061
式中,
Figure BDA0001790979690000062
其中,设换流器直流侧功率Pdc为1MW;换流器的功率因素角φ=0.8为;每相换相电抗Xc=800;μ为换相位;直流运行电流Id=20A;换流变压器阀侧绕组空载电压有效值U11=380V;整流器触发角α为30度;直流电压Ud为300V;Udio为理想空载电压,等于U11
Figure BDA0001790979690000063
倍。
计算得Qdc=841var。
步骤3、计算风电场与换流站间无功功率Qpd,公式如下
Figure BDA0001790979690000064
步骤4、对微网线路进行故障判断,短路判断,微网内过电压故障判断:
短路判断:m1=(c1+c2+c3+c4+c5)2=422.7;
电压故障判断:m2=lg(c1+c2+c3+c4+c5)2+lnQpd=5.1;
所以线路属于过电压运行状态。

Claims (1)

1.一种基于微网信息流的数据分析故障诊断方法,其特征在于,具体包括如下流程,
步骤1、采集微网内的光伏电站,风电场,热电厂,电池储能,电储热装置的数据,包括:光伏电站当前工作输出电压U1,以及当前输出电流I1;风电场当前工作时的电压输出U2,以及当前输出电流I2;热电厂当前工作的输出电压U3,以及 输出电流I3;电池储能装置当前工作的额定电压输出U4,以及输出电流I4;电储热装置当前输入电压U5,以及当前输入电流I5
步骤2、计算影响因子、风电机组发出无功功率和微网换流站无功功率消耗,包括步骤2.1~步骤2.3,步骤2.1~步骤2.3不分先后顺序:
步骤2.1、对微网内的光伏电站、风电场、热电厂、电池储能、电储热装置的电压、电流进行如下方法计算,得到对应的影响因子cn,n=1…5:
Figure FDA0003209736180000011
Figure FDA0003209736180000012
Figure FDA0003209736180000013
Figure FDA0003209736180000014
Figure FDA0003209736180000015
步骤2.2、计算风电机组发出无功功率Qr,公式如下:
Qr=Qxrσ+s(Qe+Qxsσ+Qs) (6)
其中,Qs为定子无功功率,Qxsσ为定子漏感消耗的无功功率,Qxrσ为转子漏感消耗的无功功率,Qe为气隙励磁功率,s为转差率;
步骤2.3、计算微网换流站无功功率消耗Qdc,公式如下:
Figure FDA0003209736180000016
式中,
Figure FDA0003209736180000017
其中,Pdc为换流器直流侧功率;
Figure FDA0003209736180000018
为换流器的功率因数角;Xc为每相换相电抗;μ为换相位;Id为直流运行电流;U11为换流变压器阀侧绕组空载电压有效值;α为整流器触发角;Ud为直流电压;Udio为理想空载电压,Udio等于U11
Figure FDA0003209736180000019
倍;
步骤3、计算风电场与换流站间无功功率Qpd,公式如下
Figure FDA0003209736180000021
步骤4、对微网线路进行故障判断,包括短路判断和微网内过电压故障判断:
短路判断:使用如下公式计算短路参数:
m1=ln(c1+c2+c3+c4+c5)2 (10)
若m1>400则线路正常,若m1≤400则线路发生短路;
电压故障判断:使用如下公式计算电压故障参数:
m2=ln(c1+c2+c3+c4+c5)2+lnQpd (11)
若m2≤3则线路发生欠电压,若3<m2≤5则线路正常,m2>5则发生过电压现象。
CN201811036398.9A 2018-09-06 2018-09-06 一种基于微网信息流的数据分析故障诊断方法 Active CN109066665B (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811036398.9A CN109066665B (zh) 2018-09-06 2018-09-06 一种基于微网信息流的数据分析故障诊断方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811036398.9A CN109066665B (zh) 2018-09-06 2018-09-06 一种基于微网信息流的数据分析故障诊断方法

Publications (2)

Publication Number Publication Date
CN109066665A CN109066665A (zh) 2018-12-21
CN109066665B true CN109066665B (zh) 2021-10-15

Family

ID=64760707

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811036398.9A Active CN109066665B (zh) 2018-09-06 2018-09-06 一种基于微网信息流的数据分析故障诊断方法

Country Status (1)

Country Link
CN (1) CN109066665B (zh)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102624023B (zh) * 2011-01-31 2014-07-09 华锐风电科技(集团)股份有限公司 双馈型机组风电场的无功电压控制系统
CN203117343U (zh) * 2013-02-01 2013-08-07 天津市电力公司 基于智能电表的微电网短路故障诊断系统
CN103825279B (zh) * 2014-02-21 2015-11-04 华南理工大学 基于鲁棒控制的微电网系统电压稳定控制方法
CN103903073B (zh) * 2014-04-23 2017-03-08 河海大学 一种含分布式电源及储能的微电网优化规划方法及系统
CN104218606B (zh) * 2014-09-02 2017-05-24 南方电网科学研究院有限责任公司 微电网中央控制器
CN104330979B (zh) * 2014-10-31 2017-04-05 国家电网公司 复杂配电网模拟仿真系统
CN106532730B (zh) * 2016-12-28 2019-01-29 江苏金风科技有限公司 微电网动态稳定控制系统和方法

Also Published As

Publication number Publication date
CN109066665A (zh) 2018-12-21

Similar Documents

Publication Publication Date Title
Farhoodnea et al. Power quality impacts of high-penetration electric vehicle stations and renewable energy-based generators on power distribution systems
Reddy et al. Retrofitted hybrid power system design with renewable energy sources for buildings
Jadidi et al. A review on operation, control and protection of smart microgrids
CN105098833A (zh) 用于微电网的异步恒速风电机组系统及其工作方法
Farantatos et al. Short-circuit current contribution of converter interfaced wind turbines and the impact on system protection
Dayo et al. LVRT enhancement of a grid-tied PMSG-based wind farm using static VAR compensator
Bernal-Perez et al. Connection of off-shore wind power plants to VSC-MTdc networks using HVdc diode-rectifiers
Shah et al. Impedance-based prediction of SSR-generated harmonics in doubly-fed induction generators
Zobaa et al. A comprehensive review of power quality issues and measurement for grid-integrated wind turbines
Ceaki et al. Analysis of SVC influence on the power quality for grid-connected PV plants
Sarwar et al. Improvement of fault ride through capability of DFIG-based wind turbine systems using superconducting fault current limiter
CN109066665B (zh) 一种基于微网信息流的数据分析故障诊断方法
Gursoy et al. Representation of variable speed wind turbine generators for short circuit analysis
Sharma et al. Power Management and Voltage Regulation of Self-Governed Hybrid RE-Source Microgrid System for Distribution Load
Guo et al. Variation of short-circuit current in the power system with large-scale wind power centralized access
Chakraborty et al. Analyzing the dynamic behavior of a DFIG-based wind farm under sudden grid disturbances
Zhu et al. An improved newton load flow for distributed generation based on different control strategies
Li et al. Subsynchronous oscillation events in an MTDC-connected renewable energy system
Molinas et al. Reactive support for wind and wave farms with a STATCOM for integration into the power system
Gevorgian et al. Validation and testing of advanced grid services by inverter-coupled resources
El Karkri et al. A comparison between Series Dynamic Resistors and CROWBAR circuit protection for LVRT capability of Doubly-Fed Induction Generator
Jhumka et al. Fault and stability analysis of a solar PV system connected to an infinite bus
Eskander et al. Performance of double fed induction machine at sub-and super-synchronous speed in wind energy conversion system
Guoqing et al. Study on Operation Characteristics of Wind Power Grid-connected Doubly-Fed AC/DC Hybrid System
Acero et al. Cupisnique Wind Power Plant and the Effect of THD on the Connection to the Grid. Case Study for 80 MW

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant