WO2020258702A1 - 一种电网监控信息基础事件生成及更新方法 - Google Patents

一种电网监控信息基础事件生成及更新方法 Download PDF

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WO2020258702A1
WO2020258702A1 PCT/CN2019/120479 CN2019120479W WO2020258702A1 WO 2020258702 A1 WO2020258702 A1 WO 2020258702A1 CN 2019120479 W CN2019120479 W CN 2019120479W WO 2020258702 A1 WO2020258702 A1 WO 2020258702A1
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event
signal
basic
events
monitoring information
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French (fr)
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盛振明
孙世明
管志威
唐元合
韩肖
沈鑫
于雷
魏学云
马洁
史宁波
岑红星
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国电南瑞科技股份有限公司
国家电网有限公司
国电南瑞南京控制系统有限公司
南瑞集团有限公司
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Publication of WO2020258702A1 publication Critical patent/WO2020258702A1/zh

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  • the invention relates to a method for generating and updating basic events of power grid monitoring information, and belongs to the technical field of power grid monitoring.
  • the scale of the power grid continues to expand, and the substation continues to develop in the direction of intelligent unattended operation, which puts forward higher requirements for the regulation and control profession to accurately grasp the operation of field equipment, quickly respond to grid equipment failures, and restore the grid operation mode in time.
  • the scale of power grid equipment expands and the level of intelligent monitoring improves, the amount of equipment failure alarm information shows a geometric growth trend.
  • the existing power grid monitoring business relies on the monitoring method of responding to the alarm information one by one, and each piece of information needs to be discriminated and analyzed one by one. And give feedback, the integrated intelligent alarm application function that has been implemented analyzes and recognizes grid accidents, and solves the monitoring problems of comprehensive events.
  • the purpose of the present invention is to overcome the deficiencies in the prior art and provide a method for generating and updating basic events of power grid monitoring information, which can effectively reduce the amount of power grid monitoring signals, improve the efficiency of monitoring operation duty, and enhance the ability to sense power grid faults.
  • the present invention provides a method for generating power grid monitoring information basic events, which includes the following steps:
  • the signal events are merged with the same equipment in the same interval to generate a basic event.
  • the method for defining the signal event rule library includes: defining the signal event category, defining the judgment rule corresponding to the signal event, and defining the alarm level corresponding to the signal event.
  • the signal event categories include: instantaneous signal events, abnormal motion signal events, mildly frequent signal events, moderately frequent signal events, and severely frequent signal events, corresponding to signal event alarm levels They are: notification, abnormal alarm, abnormal alarm, severe alarm, and critical alarm.
  • the method for defining the judgment rule includes the following steps:
  • TF3 ⁇ TF2 ⁇ TF1 NF3>NF2>NF1
  • T ⁇ 60s TF3 ⁇ TF2 ⁇ TF1
  • the attributes of the basic event include:
  • Basic event occurrence time the occurrence time of the first signal event of the equipment to which the grid monitoring information belongs
  • Base Event Update Time time to monitor the occurrence of a signal event belongs to the latest information device grid
  • Basic event content signal events including the highest alarm level and the latest time
  • Basic event alarm level inherits the highest alarm level of signal events contained in the equipment to which the grid monitoring information belongs.
  • the present invention provides a method for updating basic events of power grid monitoring information.
  • the updating method includes the following steps:
  • the corresponding basic event When a signal event occurs, if the corresponding basic event has been generated under the device to which the grid monitoring information belongs, it is determined whether the alarm level of the newly occurred signal event is equal to or higher than the generated basic event alarm level: if so, the basic event alarm level, Basic event content and basic event update time; if not, update the basic event update time and basic event content; if the corresponding basic event has not been generated under the equipment to which the grid monitoring information belongs, the corresponding basic event is generated using the aforementioned generation method ;
  • the signal event When the signal event is deleted, judge whether the signal event is the highest alarm level or the latest time event. If it is, then re-judge all the signal events under the equipment to which the grid monitoring information belongs, according to the highest basic event alarm level and the latest signal event, according to the aforementioned The generation method regenerates the basic event, otherwise, the basic event is not updated.
  • the update method further includes: for a device that has not generated a signal event beyond the maximum storage time of the basic event, periodically deleting all signal events and basic events under the device.
  • the basic event deletion conditions are:
  • T now is the current time
  • T base_update is the update time of the base event
  • T save is the maximum save time of the base event.
  • the basic event recognition based on the granularity of the interval equipment enables the regulator to perceive the current operating status and severity of the equipment in a timely manner and improve the ability to control the power grid;
  • the regulator can perceive the change of equipment status and assist in the analysis of equipment status trends.
  • Fig. 1 is a flowchart of a method for generating and updating a basic event of grid monitoring information provided by an embodiment of the present invention.
  • the method for generating and updating basic event of grid monitoring information provided by the embodiment of the present invention, firstly, according to a predefined event rule library, signal events such as abnormal actions, transients, frequent occurrences, moderate frequent occurrences, and severe frequent occurrences of grid monitoring information are identified ; Then according to the equipment to which the information belongs, the signal events are merged to generate a basic event.
  • the basic event conditionally inherits the signal event alarm level and content.
  • the conditions include: the basic event level inherits the highest alarm level of the signal event, and the output content of the basic event contains the highest alarm level And the latest time signal events; in the process of signal events occurring, disappearing, and degrading, the basic events are dynamically updated accordingly.
  • the method provided by the embodiment of the present invention realizes the identification of isolated alarm signals of the power grid, generates signal events, and merges them according to the granularity of the interval equipment, effectively reduces the amount of monitoring signals, improves the efficiency of monitoring operation duty, and improves the fault perception of the power grid ability.
  • FIG. 1 it is a flowchart of a method for generating and updating a basic event of grid monitoring information provided by the present invention.
  • the basic event generation method of power grid monitoring information includes the following steps:
  • Step 1 Collect real-time grid monitoring information from the smart grid dispatching control system, and enable the basic event generation process
  • Step 2 Determine whether the current time is a new day. If it is, first delete the basic event of the device to which the grid monitoring information belongs and all signal events under the device, and then enter the signal event identification process; otherwise, directly enter the signal event identification process.
  • the new day judgment condition is: every day 00:00:00 ⁇ 23:59:59 is a time period, every day after 0 o'clock, it is judged as a new day.
  • Step 3 Based on the predefined signal event rule library, identify signal events, the priority from highest to bottom is: severely frequent signal events, moderately frequent signal events, mildly frequent signal events, action signal events, instantaneous Signal event.
  • the definition method of the signal event rule library includes: defining the signal event category, defining the judgment rule corresponding to the signal event, and defining the alarm level corresponding to the signal event.
  • Signal event categories include: instantaneous signal events, abnormal motion signal events, mild signal events, moderate signal events, and severe signal events.
  • the corresponding signal event alarm levels are: notification, abnormal alarm, abnormal alarm , Severe alarm, critical alarm.
  • the method for defining the judgment rule includes the following steps:
  • T if the signal acts and resets, it is determined that the signal event is a transient signal event; T is 60s by default;
  • TF1 if the number of signal actions exceeds the preset limit NF1, it is determined that the signal event is a light signal event; TF1 defaults to 3600 seconds, and NF1 defaults to 10 times;
  • the signal event is determined to be a moderately frequent signal event;
  • TF2 defaults to 86400 seconds, NF2 defaults to 50 times, and satisfies TF2 ⁇ TF1, NF2>NF1;
  • TF3 if the number of signal actions exceeds the preset limit NF3, it is determined that the signal event is a severely frequent signal event; TF3 defaults to 86400 seconds, and NF3 defaults to 100 times, satisfying TF3 ⁇ TF2, NF3>NF2.
  • Step 4 According to the relationship between signals and devices established in the power grid model of the smart grid regulation and control system, the signal events are merged according to the principle of the same device in the same interval, and the basic events are generated and the related attributes of the signal events are inherited, as follows:
  • Basic event occurrence time the occurrence time of the first signal event of the device
  • Base Event Update Time time of occurrence of a signal event for the latest equipment
  • Basic event content signal events including the highest alarm level and the latest time
  • Basic event alarm level inherit the highest alarm level of signal events contained in the device.
  • the basic event generation method provided by the present invention recognizes isolated grid alarm signals and merges them according to the equipment, which greatly reduces the number of monitoring alarms, especially in the case of frequent signal occurrence. Effectively improve the efficiency of monitoring operation monitoring; the basic event recognition based on the granularity of the interval equipment enables the regulator to perceive the current operating status and severity of the equipment in a timely manner, and enhance the ability to control the power grid.
  • the embodiment of the present invention also provides a method for updating basic events of power grid monitoring information, which includes the following steps:
  • a basic event has been generated under the device, first determine whether the alarm level of the newly generated signal event is equal to or higher than the alarm level of the current basic event. If so, update the basic event alarm level and output the basic event content corresponding to the highest alarm level. Update the basic event update time; if not, update the basic event update time and the latest basic event content.
  • the signal event When the signal event is deleted, judge whether the signal event is the highest alarm level or the latest time event. If it is, then re-judge all the signal events under the device, and regenerate according to the highest alarm level and the latest signal event using the aforementioned generation method Basic event, otherwise the basic event will not be updated.
  • the basic event deletion conditions are:
  • T now is the current time
  • T base_update is the update time of the base event
  • T save is the maximum save time of the base event.
  • the default is 7 ⁇ 24 hours.
  • the deletion operation is performed once an hour. When the basic event meets the deletion conditions, all signal events under the device are also deleted simultaneously.
  • the signal event generation cycle receives the power grid monitoring information alarm for processing.
  • the method for updating the basic event of grid monitoring information provided by the embodiment of the present invention enables the regulator to perceive the change of the equipment state and assists in the analysis of the equipment state trend through the update mechanism of the basic event.

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Abstract

本发明公开了一种电网监控信息基础事件生成及更新方法,所述生成方法包括:采集电网监控信息,根据预定义的信号事件规则库,识别与所述电网监控信息相对应的信号事件;根据电网监控信息所属设备,按照同间隔内同设备对所述信号事件进行归并,生成基础事件。本发明提供基础事件生成方法通过对电网告警孤立信号进行事件识别,按照所述设备进行归并,大大减少监视告警数量,特别是信号发生频发的情况,有效提升监控运行监控效率。本发明提供的基础事件更新方法通过对基础事件的更新机制,使得调控员能够感知设备状态的变化情况,辅助设备状态趋势分析。

Description

一种电网监控信息基础事件生成及更新方法 技术领域
本发明涉及一种电网监控信息基础事件生成及更新方法,属于电网监控技术领域。
背景技术
电网规模不断扩大,变电站向智能化无人值守方向不断发展,对调控专业准确掌握现场设备运行情况、快速响应电网设备故障、及时恢复电网运行方式提出了更高要求。然而,随着电网设备规模扩大及智能监测水平提升,设备故障告警信息的数量呈现几何级增长趋势,现有电网监控业务依赖告警信息逐条响应的监视方式,需要对每一条信息逐一进行判别、分析并做出反馈,已实现的综合智能告警应用功能对电网事故进行分析识别,解决的综合性事件的监视问题,但由于涉及的监控设备数量繁多、监控信息量大、异常故障情况复杂,遗留下的孤立告警信息监视问题没有解决,监控员监视压力仍然很大,很难全面支撑日益发展的电网运行监视。
发明内容
本发明的目的在于克服现有技术中的不足,提供一种电网监控信息基础事件生成及更新方法,能够有效降低电网监视信号量,提高监控运行值班效率,提升对电网故障的感知能力。
为达到上述目的,本发明是采用下述技术方案实现的:
第一方面,本发明提供了一种电网监控信息基础事件生成方法,包括如下步骤:
采集电网监控信息,根据预定义的信号事件规则库,识别与所述电网监控信息相对应的信号事件;
根据电网监控信息所属设备,按照同间隔内同设备对所述信号事件进行归并,生成基础事件。
结合第一方面,进一步的,所述信号事件规则库的定义方法包括:定义信号事件类别、定义信号事件对应的判断规则和定义信号事件对应的告警等级。
结合第一方面,进一步的,所述信号事件类别包括:瞬动信号事件、异常动作信号事件、轻度频发信号事件、中度频发信号事件、重度频发信号事件,对应信号事件告警等级分别为:告知、异常告警、异常告警、严重告警、危急告警。
结合第一方面,进一步的,所述判断规则的定义方法包括如下步骤:
在预设时间T内,信号动作并复归,则判定为瞬动信号事件;
在预设时间T内,信号动作未复归,则判定为异常动作信号事件,;
在预设时间TF1内,信号动作次数超过预设限值NF1,则判定为轻度频发信号事件;
在预设时间TF2内,信号动作次数超过预设限值NF2,则判定为中度频发信号事件;
在预设时间TF3内,信号动作次数超过预设限值NF3,则判定为重度频发信号事件;
其中:TF3≥TF2≥TF1,NF3>NF2>NF1,T≤60s。
结合第一方面,进一步的,所述基础事件的属性包括:
基础事件发生时间:为电网监控信息所属设备第一条信号事件发生时间
基础事件更新时间:为电网监控信息所属设备最新一条信号事件发生时间
基础事件内容:包含最高告警等级以及最新时间的信号事件;
基础事件告警等级:继承电网监控信息所属设备所包含的信号事件最高告警等级。
结合第一方面,进一步的,在识别与所述电网监控信息相对应的信号事件之前,判断是否为新的一天,如果是,则首先删除该信号事件所属设备下的所有信号事件及基础事件,再进行信号事件识别;否则,直接进行信号事件识别。
第二方面,本发明提供了一种电网监控信息基础事件更新方法,所述更新方法包括如下步骤:
信号事件发生时,若电网监控信息所属设备下已生成相应的基础事件,则判断新发生信号事件告警等级是否等于或高于已生成的基础事件告警等级:如果是,则更新基础事件告警等级、基础事件内容、基础事件更新时间;如果不是,则更新基础事件更新时间及基础事件内容;若电网监控信息所属设备下还没生成过相应的基础事件,则采用前述的生成方法生成对应的基础事件;
当信号事件发生降级时,判断信号事件是否为最高告警等级,如果是,则更新对应基础事件的最高告警等级,并更新最新时间基础事件,否则,只更新最新时间基础事件;
当信号事件发生删除时,判断信号事件是否为最高告警等级或最新时间事件,如果是,则重新判断电网监控信息所属设备下所有的信号事件,按照最高基础事件告警等级及最新信号事件,根据前述的生成方法重新生成基础事件,否则,不更新基础事件。
结合第二方面,进一步的,所述更新方法还包括:对于超过基础事件最大 保存时间未发生信号事件的设备,定期删除该设备下的所有信号事件及基础事件。
结合第二方面,进一步的,基础事件删除条件为:
T now-T base_update≥T save
其中:T now为当前时间,T base_update为基础事件更新时间,T save为基础事件最大保存时间。
与现有技术相比,本发明所达到的有益效果是:
通过对电网告警孤立信号进行事件识别,按照所述设备进行归并,大大减少监视告警数量,特别是信号发生频发的情况,有效提升监控运行监控效率;
基于间隔设备粒度的基础事件识别,使调控员能够及时感知设备当前运行状态以及严重程度,提升对电网的掌控能力;
通过对基础事件的更新机制,使得调控员能够感知设备状态的变化情况,辅助设备状态趋势分析。
附图说明
图1是本发明实施例提供的一种电网监控信息基础事件生成及更新方法的流程图。
具体实施方式
本发明实施例提供的电网监控信息基础事件生成及更新方法,首先根据预定义的事件规则库,识别电网监控信息的异常动作、瞬动、频发、中度频发、重度频发等信号事件;然后按信息所属设备,对信号事件进行归并生成基础事件,基础事件有条件的继承信号事件告警等级和内容,条件包括:基础事件等级继承信号事件最高告警等级,基础事件输出内容包含最高告警等级以及最新时间的信号事件;在信号事件发生、消失、降级的过程中,基础事件随之动态 更新。对于长时间未发生信号事件的设备,定期删除基础事件以及所包含的所有信号事件。本发明实施例提供的方法实现了对电网孤立的告警信号识别,生成信号事件,并按间隔设备粒度进行合并,有效降低了监视信号量,提高了监控运行值班效率,提升了对电网的故障感知能力。
下面结合附图对本发明作进一步描述。以下实施例仅用于更加清楚地说明本发明的技术方案,而不能以此来限制本发明的保护范围。
如图1所示,是本发明提供的一种电网监控信息基础事件生成及更新方法的流程图。
电网监控信息基础事件生成方法包括如下步骤:
步骤一:从智能电网调度控制系统中实时采集电网监控信息,启用基础事件生成流程;
步骤二:判断当前时间是否为新的一天,如果是,则首先删除电网监控信息所属设备的基础事件以及设备下所有信号事件,然后再进入信号事件识别流程;否则,直接进入信号事件识别流程。
新的一天判断条件为:每天00:00:00~23:59:59为一个时间周期,每天0点后,判定为新的一天。
步骤三:基于预定义的信号事件规则库,识别信号事件,优先级从高到底依次为:重度频发信号事件、中度频发信号事件、轻度频发信号事件、动作信号事件、瞬动信号事件。
信号事件规则库的定义方法包括:定义信号事件类别、定义信号事件对应的判断规则和定义信号事件对应的告警等级。
信号事件类别包括:瞬动信号事件、异常动作信号事件、轻度频发信号事 件、中度频发信号事件、重度频发信号事件,对应信号事件告警等级分别为:告知、异常告警、异常告警、严重告警、危急告警。
所述判断规则的定义方法包括如下步骤:
在预设时间T内,信号动作并复归,则判定信号事件为瞬动信号事件;T默认为60s;
在预设时间T内,信号动作未复归,则判定信号事件为异常动作信号事件;
在预设时间TF1内,信号动作次数超过预设限值NF1,则判定信号事件为轻度频发信号事件;TF1默认3600秒,NF1默认10次;
在预设时间TF2内,信号动作次数超过预设限值NF2,则判定信号事件为中度频发信号事件;TF2默认86400秒,NF2默认50次,满足TF2≥TF1,NF2>NF1;
在预设时间TF3内,信号动作次数超过预设限值NF3,则判定信号事件为重度频发信号事件;TF3默认86400秒,NF3默认100次,满足TF3≥TF2,NF3>NF2。
一个信号在某个时刻的事件只有一种,并根据信号告警发生情况实时更新该信号事件。如:XX厂站/XX间隔/XX开关油压低合闸闭锁信号等级为异常,在一段时间内发生的动作时序为:
时间 信号状态 信号事件 告警等级
2019年1月2日 13:05:00 动作    
2019年1月2日 13:05:20 复归 瞬动 告知
2019年1月2日 13:05:40 动作    
2019年1月2日 13:06:00 复归 瞬动 告知
2019年1月2日 13:06:20 动作 异常动作 异常
2019年1月2日 13:07:30 复归 异常动作(复归) 异常
2019年1月2日 13:07:50 动作    
2019年1月2日 13:08:10 复归 瞬动 告知
2019年1月2日 13:08:20 动作    
2019年1月2日 13:08:30 复归 瞬动 告知
2019年1月2日 13:08:40 动作    
2019年1月2日 13:08:50 复归 瞬动 告知
2019年1月2日 13:09:00 动作    
2019年1月2日 13:05:00 复归 瞬动 告知
2019年1月2日 13:09:00 动作    
2019年1月2日 13:05:00 复归 瞬动 告知
2019年1月2日 13:09:00 动作    
2019年1月2日 13:05:00 复归 瞬动 告知
2019年1月2日 13:09:00 动作    
2019年1月2日 13:05:00 复归 瞬动 告知
2019年1月2日 13:09:00 动作    
2019年1月2日 13:05:00 复归 轻度频发 异常
步骤四:根据智能电网调控控制系统电网模型中建立的信号与设备之间的关系,遵循同间隔内同设备的原则对信号事件进行归并,生成基础事件并继承信号事件相关属性,具体如下:
基础事件发生时间:为该设备第一条信号事件发生时间;
基础事件更新时间:为该设备最新一条信号事件发生时间;
基础事件内容:包含最高告警等级以及最新时间的信号事件;
基础事件告警等级:继承设备所包含的信号事件最高告警等级。
信号事件生成基础事件示例如下:
XX厂站XX间隔断路器液压机构设备,发生了以下信号事件:
Figure PCTCN2019120479-appb-000001
Figure PCTCN2019120479-appb-000002
对应时刻的基础事件分别为:
Figure PCTCN2019120479-appb-000003
至此,完成电网监控信息基础事件生成操作,本发明提供的基础事件生成方法通过对电网告警孤立信号进行事件识别,按照所述设备进行归并,大大减少监视告警数量,特别是信号发生频发的情况,有效提升监控运行监控效率;基于间隔设备粒度的基础事件识别,使调控员能够及时感知设备当前运行状态以及严重程度,提升对电网的掌控能力。
本发明实施例还提供了一种电网监控信息基础事件更新方法,包括如下步骤:
发生信号事件时,如果对应设备下还没有生成过基础事件,则采用前述的生成方法生成基础事件,所生成的基础事件属性继承信号事件相关属性;
如果该设备下已生成基础事件,首先判断新生成信号事件的告警等级是否等于或高于当前基础事件的告警等级,如果是,则更新基础事件告警等级、输出最高告警等级对应的基础事件内容、更新基础事件更新时间;如果不是,则更新基础事件更新时间以及最新基础事件内容。
当信号事件发生降级时,判断信号事件是否为最高告警等级,如果是,则更新对应基础事件的最高告警等级,并更新最新时间基础事件,否则,只更新最新时间基础事件;
当信号事件发生删除时,判断信号事件是否为最高告警等级或最新时间事件,如果是,则重新判断该设备下所有的信号事件,按最高告警等级以及最新信号事件,采用前述的生成方法重新生成基础事件,否则不更新基础事件。
对于超过基础事件最大保存时间未发生信号事件的设备,定期删除该设备下的所有信号事件及基础事件,基础事件删除条件为:
T now-T base_update≥T save
其中:T now为当前时间,T base_update为基础事件更新时间,T save为基础事件最大保存时间,默认为7×24小时。每小时执行一次删除操作,当基础事件满足删除条件时,该设备下所有信号事件也同步删除。
信号事件生成循环接收电网监控信息告警进行处理。
本发明实施例提供的电网监控信息基础事件更新方法通过对基础事件的更新机制,使得调控员能够感知设备状态的变化情况,辅助设备状态趋势分析。
以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明技术原理的前提下,还可以做出若干改进和变形,这些改进和变形也应视为本发明的保护范围。

Claims (9)

  1. 一种电网监控信息基础事件生成方法,其特征在于,包括如下步骤:
    采集电网监控信息,根据预定义的信号事件规则库,识别与所述电网监控信息相对应的信号事件;
    根据电网监控信息所属设备,按照同间隔内同设备对所述信号事件进行归并,生成基础事件。
  2. 根据权利要求1所述的电网监控信息基础事件生成方法,其特征在于,所述信号事件规则库的定义方法包括:定义信号事件类别、定义信号事件对应的判断规则和定义信号事件对应的告警等级。
  3. 根据权利要求2所述的电网监控信息基础事件生成方法,其特征在于,所述信号事件类别包括:瞬动信号事件、异常动作信号事件、轻度频发信号事件、中度频发信号事件、重度频发信号事件,对应信号事件告警等级分别为:告知、异常告警、异常告警、严重告警、危急告警。
  4. 根据权利要求3所述的电网监控信息基础事件生成方法,其特征在于,所述判断规则的定义方法包括如下步骤:
    在预设时间T内,信号动作并复归,则判定为瞬动信号事件;
    在预设时间T内,信号动作未复归,则判定为异常动作信号事件,;
    在预设时间TF1内,信号动作次数超过预设限值NF1,则判定为轻度频发信号事件;
    在预设时间TF2内,信号动作次数超过预设限值NF2,则判定为中度频发信号事件;
    在预设时间TF3内,信号动作次数超过预设限值NF3,则判定为重度频发 信号事件;
    其中:TF3≥TF2≥TF1,NF3>NF2>NF1,T≤60s。
  5. 根据权利要求1所述的电网监控信息基础事件生成方法,其特征在于,所述基础事件的属性包括:
    基础事件发生时间:为电网监控信息所属设备第一条信号事件发生时间
    基础事件更新时间:为电网监控信息所属设备最新一条信号事件发生时间
    基础事件内容:包含最高告警等级以及最新时间的信号事件;
    基础事件告警等级:继承电网监控信息所属设备所包含的信号事件最高告警等级。
  6. 根据权利要求1所述的电网监控信息基础事件生成方法,其特征在于,在识别与所述电网监控信息相对应的信号事件之前,判断是否为新的一天,如果是,则首先删除该信号事件所属设备下的所有信号事件及基础事件,再进行信号事件识别;否则,直接进行信号事件识别。
  7. 一种电网监控信息基础事件更新方法,其特征在于,所述更新方法包括如下步骤:
    信号事件发生时,若电网监控信息所属设备下已生成相应的基础事件,则判断新发生信号事件告警等级是否等于或高于已生成基础事件告警等级:如果是,则更新基础事件告警等级、基础事件内容、基础事件更新时间;如果不是,则更新基础事件更新时间及基础事件内容;若电网监控信息所属设备下还没生成过相应的基础事件,则采用权利要求1至6任一项所述的生成方法生成对应的基础事件;
    当信号事件发生降级时,判断信号事件是否为最高告警等级,如果是,则 更新对应基础事件的最高告警等级,并更新最新时间基础事件,否则,只更新最新时间基础事件;
    当信号事件发生删除时,判断信号事件是否为最高告警等级或最新时间事件,如果是,则重新判断电网监控信息所属设备下所有的信号事件,按照最高基础事件告警等级及最新信号事件,根据权利要求1至6任一项所述的生成方法重新生成基础事件,否则,不更新基础事件。
  8. 根据权利要求7所述的电网监控信息基础事件更新方法,其特征在于,所述更新方法还包括:对于超过基础事件最大保存时间未发生信号事件的设备,定期删除该设备下的所有信号事件及基础事件。
  9. 根据权利要求8所述的电网监控信息基础事件更新方法,其特征在于,基础事件删除条件为:
    T now-T base_update≥T save
    其中:T now为当前时间,T base_update为基础事件更新时间,T save为基础事件最大保存时间。
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