CN100508326C - 用于避免供电网中严重干扰的方法 - Google Patents
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- CN100508326C CN100508326C CNB2005800075276A CN200580007527A CN100508326C CN 100508326 C CN100508326 C CN 100508326C CN B2005800075276 A CNB2005800075276 A CN B2005800075276A CN 200580007527 A CN200580007527 A CN 200580007527A CN 100508326 C CN100508326 C CN 100508326C
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/46—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to frequency deviations
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
Abstract
本发明涉及一种通过对网络电压进行频谱分析用于避免供电网(7)中的严重干扰的方法,其中借助于电压A/D转换器(2)和频谱分析装置(3)按照频率间隔确定一定等级的频谱;在比较器(4)中将所述频谱与所存储的已知干扰的频率间隔等级-参考模式进行比较;并针对分别相符的比较结果通过一个通信接口给出相应的输出或者给出一个或多个中继通知,其中频率被划分为13个通过频率边界值所确定的间隔等级。
Description
技术领域
本发明涉及一种用于避免供电网中严重干扰的方法,其对网络电压进行频谱分析。
背景技术
近年来,加强供电网的动态性的研究已经进行。其中特别感兴趣的是对非线性系统的分析,从而能够得到关于供电网的稳定性的结论。在IEEE报告“Voltage Stability Assessment:Concepts,Practices andTools,August 2002”中总结出了一些解决方案,并提到了一些重要的参考文献。
这些研究的要点以及对网络模型的进一步仿真和分析已经得出以下结论:即在一个电能系统中的特定激励产生了带有区别性特征的动态平衡过程。这适合于对其进行辨别,以对激励事件进行识别。此外还得到了以下结论:即可能会导致严重干扰的崩溃现象始终通过一系列可事先识别的动态事件被预示出来。负载的动态性对于稳定性极限和振动动态性的特殊影响将通过分歧分析来确定。
以下事实为避免严重干扰提供了回旋余地:即仅在可识别的动态事件之后的15秒至300秒之间会出现崩溃现象。在这段时间内出现了作为基础的漂移过程、电压幅值的持续增长或下降。
由WO96/35250已知了一种用于检测电能传输线上的无线电放电的装置,从而在发生潜在的干扰之前给出警报。当识别出高频宽带干扰信号时,其借助滤波器执行频率分析,并得出无线电放电的结论。
发明内容
与此不同,根据本发明是通过对电压的频谱分析对发生在严重干扰之前的动态平衡过程进行观测。其中特别重要的是将频谱划分成多个频率间隔等级。这些频率间隔等级必须被如此划分:使得可以通过这些频率间隔等级间的显著区别来反映出不同的干扰类型。
本发明提供了一种通过对网络电压进行频谱分析用于避免供电网中的严重干扰的方法,其中借助于电压A/D转换器和频谱分析装置按照频率间隔确定一定等级的频谱;在比较器中将所述频谱与所存储的已知干扰的频率间隔等级-参考模式进行比较;并针对分别相符的比较结果通过一个通信接口给出相应的输出或者给出一个或多个中继通知。
基于对网络模型的仿真和分析以及对文献的评估,对于标称频率为50Hz的网络,以下列方式来确定频率间隔等级:
间隔等级 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 |
频率/Hz | ≥0.0<0.3 | ≥0.3<0.7 | ≥0.7<1.1 | ≥1.1<2.0 | ≥2.0<2.5 | ≥2.5<4.0 | ≥4.0<14.0 | ≥14.0<20.0 | ≥20.0<29.0 | ≥29.0<35.0 | ≥35.0<49.9 | ≥49.9<50.1 | ≥50.1 |
对于标称频率为60Hz的网络,以下列方式来确定频率间隔等级:
间隔等级 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 |
频率/Hz | ≥0.0<0.3 | ≥0.3<0.7 | ≥0.7<1.1 | ≥1.1<2.0 | ≥2.0<2.5 | ≥2.5<4.0 | ≥4.0<14.0 | ≥14.0<20.0 | ≥20.0<29.0 | ≥29.0<35.0 | ≥35.0<59.9 | ≥59.9<60.1 | ≥60.1 |
在特殊的情况下,频率间隔等级需要适应于网络的负载和振动动态性进行匹配。为此需要在线执行分歧分析。
根据本发明,对干扰的识别和分析是基于以下事实:对应于不同的干扰出现特定的频率间隔等级-参考模式。例如下列模式:
中间系统振动
间隔等级 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 |
模式 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
本地受限振荡
间隔等级 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 |
模式 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
模式1扭转振荡
间隔等级 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 |
模式 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
超同步模式扭转振荡
间隔等级 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 |
模式 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 0 | 1 |
附图说明
图1中示出了根据本发明的用于避免供电网中严重干扰的设备的框图。
具体实施方式
用于避免供电网7中的严重干扰的设备(图1)包括A/D转换器2,它对交流电网1的电压进行采样,并将采样值提供给频谱分析装置3和电压测量装置11。频谱分析装置3计算出要分析的频谱的对应于各个频率间隔的电压值,并将其进一步给到比较器4。这个比较器将这些间隔值与上述和可为间隔值设定的边界值相关联地存储的频率模式5进行比较。如果所述比较得到了存在干扰的结论,则将该信号转发给评估装置6,在该评估装置中确定处理干扰的策略。为了使频率间隔等级与其频率边界值相适应,所述采样值被移交给一个分歧分析器12,然后由这个分歧分析器将新的频率边界值送至频率分析装置3。
为了对作为基础的漂移过程进行鉴定,采样值通过电压测量装置11被传送到评估装置6。一个网络的特定标称频率同样通过所述频谱分析装置3来确定。
对于处理干扰的策略存在多种不同的可能性。一方面,可以通过可视显示器、中继输出端或相应的通信接口给出通知。另一方面,可以通过所述设备的中继输出端和/或通信接口经由变压器10的分级开关9嵌合到电压调节器8中。在识别出一种可能的严重干扰时,调节器可以被停机,或者将额定值设定为尽可能最低的边界值,以排除先前存在的崩溃现象。
用于避免供电网7中的严重干扰的设备和调节器8也可以通过相应的通信接口在网络传导的意义上对于等同的干扰处理相互连接,这是通过以下方式实现的:使设备7停机,或者调用其信息并在导向系统或SCADA系统中进行处理,并将调节器设定为主机模式并由导向系统或SCADA系统对额定值进行预设。
Claims (10)
1.通过对网络电压进行频谱分析用于避免供电网(7)中的严重干扰的方法,其特征在于,借助于电压A/D转换器(2)和频谱分析装置(3)按照频率间隔确定一定等级的频谱;在比较器(4)中将所述频谱与所存储的已知干扰的频率间隔等级-参考模式进行比较;并针对分别相符的比较结果通过一个通信接口给出相应的输出或者给出一个或多个中继通知,其中
频率被划分为13个如下面通过频率边界值所确定的间隔等级:
网络频率为50Hz:
或者网络频率为60Hz:
2.如权利要求1所述的用于避免供电网中的严重干扰的方法,其特征在于,通过分歧分析器(12)使频率值和频率间隔等级的数目与网络位置上的负载和振动动态性相适配。
3.如权利要求1所述的用于避免供电网中的严重干扰的方法,其特征在于,比较器(4)对于每个频率间隔具有间隔电压的可参数化的边界值。
4.如权利要求1或2所述的用于避免供电网中的严重干扰的方法,其特征在于,间隔电压的边界值自动匹配于网络的负载关系。
5.如权利要求1所述的用于避免供电网中的严重干扰的设备,其特征在于,在识别出一个干扰时由评估装置(6)给出一个可视信号。
6.如权利要求1所述的用于避免供电网中的严重干扰的方法,其特征在于,由评估装置(6)给出中继通知和/或通过通信接口给出通知,所述中继通知和/或通过通信接口给出的通知这样来影响一个电压调节器(8):使得调节器被停机或者调整到另一个额定值。
7.如权利要求1所述的用于避免供电网中的严重干扰的方法,其特征在于,采样值通过电压测量装置被传送到一个评估装置(6)。
8.如权利要求1所述的用于避免供电网中的严重干扰的方法,其特征在于,在识别出一个干扰后,为了对这个干扰进行鉴定,由评估装置(6)附带地监控网络电压的长期变化过程。
9.如权利要求8所述的用于避免供电网中的严重干扰的方法,其特征在于,在评估装置(6)中输入网络电压的斜率的参数。
10.如权利要求1所述的用于避免供电网中的严重干扰的方法,其特征在于,设置在上级的导向系统和SCADA系统通过通信接口使设备停机。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004011551A DE102004011551A1 (de) | 2004-03-08 | 2004-03-08 | Einrichtung zur Prävention von Großstörungen in elektrischen Versorgungsnetzen |
DE102004011551.6 | 2004-03-08 |
Publications (2)
Publication Number | Publication Date |
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CN1930751A CN1930751A (zh) | 2007-03-14 |
CN100508326C true CN100508326C (zh) | 2009-07-01 |
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CNB2005800075276A Expired - Fee Related CN100508326C (zh) | 2004-03-08 | 2005-02-25 | 用于避免供电网中严重干扰的方法 |
Country Status (6)
Country | Link |
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US (1) | US20110043952A1 (zh) |
EP (1) | EP1723709B1 (zh) |
CN (1) | CN100508326C (zh) |
AT (1) | ATE428208T1 (zh) |
DE (3) | DE102004011551A1 (zh) |
WO (1) | WO2005088802A1 (zh) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
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US20080288189A1 (en) * | 2007-05-14 | 2008-11-20 | Ravinuthala Ramakrishna Rao | Arc detector |
WO2010060451A1 (de) * | 2008-11-28 | 2010-06-03 | Siemens Aktiengesellschaft | Verfahren und anordnung zum erzeugen eines störungskategorisierungssignals in einem energieversorgungsnetz |
CN101902072B (zh) * | 2010-06-03 | 2012-10-03 | 山东大学 | 一种大型互联电网扰动信息辨识新方法 |
DE102012217497A1 (de) * | 2012-09-26 | 2014-03-27 | Airbus Operations Gmbh | Verfahren zum Erkennen eines Störsignale erzeugenden Geräts in einem elektrischen Netz, ein elektrisches System und ein Flugzeug |
DE102012025178A1 (de) | 2012-11-08 | 2014-05-08 | Haag - Elektronische Meßgeräte GmbH | Verfahren und Vorrichtung zur automatischen Charakterisierung und Überwachung eines elektrischen Netzes oder eines Stromnetzabschnitts eines elektrischen Netzes oder einer elektrischen Anlage |
CN103427485A (zh) * | 2013-09-09 | 2013-12-04 | 国家电网公司 | 变电站用交流电源窜入直流电源及直流电源纹波检测装置 |
US10983150B2 (en) | 2017-08-28 | 2021-04-20 | General Electric Technology Gmbh | Systems and methods for detecting and evaluating oscillations in an electrical power grid |
DE102018116443A1 (de) | 2018-07-06 | 2020-01-09 | Wobben Properties Gmbh | Verfahren zum Steuern eines Windparks |
EP4170848A1 (de) * | 2021-10-20 | 2023-04-26 | Wobben Properties GmbH | Verfahren zum dämpfen niederfrequenter schwingungen in einem elektrischen versorgungsnetz |
GB202214326D0 (en) * | 2022-09-29 | 2022-11-16 | Pulsiv Ltd | Monitoring arrangement |
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CN1153556A (zh) * | 1994-08-25 | 1997-07-02 | 西门子公司 | 监测供电网的方法和装置 |
US6456947B1 (en) * | 1996-09-13 | 2002-09-24 | General Electric Company | Digital current differential system |
US6476521B1 (en) * | 2000-05-31 | 2002-11-05 | Abb Ab | Power oscillation protection |
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US4788653A (en) * | 1986-12-23 | 1988-11-29 | General Electric Company | Digital filter for power system stabilizer |
US5047724A (en) * | 1989-12-19 | 1991-09-10 | Bell Communications Research, Inc. | Power cable arcing fault detection system |
US5729145A (en) * | 1992-07-30 | 1998-03-17 | Siemens Energy & Automation, Inc. | Method and apparatus for detecting arcing in AC power systems by monitoring high frequency noise |
SE500683C2 (sv) * | 1992-09-15 | 1994-08-08 | Asea Brown Boveri | Sätt och anordning för detektering och dämpning av svängningar vid eller nära en resonansbenägen frekvens i ett kraftöverföringssystem |
JPH10170596A (ja) * | 1996-12-09 | 1998-06-26 | Hitachi Ltd | 絶縁機器診断システム及び部分放電検出法 |
SE517963C2 (sv) * | 2000-05-31 | 2002-08-06 | Abb Ab | Nätvärnssystem för skydd av ett totalt elkraftsystems integritet, elkraftsystem innefattande ett nätvärn, systemskyddsförfarande, systemskyddsterminal samt datorprogramprodukt |
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2004
- 2004-03-08 DE DE102004011551A patent/DE102004011551A1/de not_active Withdrawn
-
2005
- 2005-02-25 DE DE502005007037T patent/DE502005007037D1/de active Active
- 2005-02-25 WO PCT/DE2005/000315 patent/WO2005088802A1/de active Application Filing
- 2005-02-25 DE DE112005001106T patent/DE112005001106A5/de not_active Withdrawn
- 2005-02-25 EP EP05715019A patent/EP1723709B1/de not_active Not-in-force
- 2005-02-25 US US11/597,726 patent/US20110043952A1/en not_active Abandoned
- 2005-02-25 CN CNB2005800075276A patent/CN100508326C/zh not_active Expired - Fee Related
- 2005-02-25 AT AT05715019T patent/ATE428208T1/de active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1153556A (zh) * | 1994-08-25 | 1997-07-02 | 西门子公司 | 监测供电网的方法和装置 |
US6456947B1 (en) * | 1996-09-13 | 2002-09-24 | General Electric Company | Digital current differential system |
US6476521B1 (en) * | 2000-05-31 | 2002-11-05 | Abb Ab | Power oscillation protection |
Also Published As
Publication number | Publication date |
---|---|
DE112005001106A5 (de) | 2007-05-24 |
EP1723709B1 (de) | 2009-04-08 |
US20110043952A1 (en) | 2011-02-24 |
DE502005007037D1 (de) | 2009-05-20 |
CN1930751A (zh) | 2007-03-14 |
DE102004011551A1 (de) | 2005-09-29 |
ATE428208T1 (de) | 2009-04-15 |
EP1723709A1 (de) | 2006-11-22 |
WO2005088802A1 (de) | 2005-09-22 |
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