CN112285631A - Judgment method and system for active early warning of current transformer - Google Patents
Judgment method and system for active early warning of current transformer Download PDFInfo
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- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims description 13
- 238000009413 insulation Methods 0.000 claims description 13
- 238000013021 overheating Methods 0.000 claims description 12
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Abstract
本发明涉及一种电流互感器主动预警方法及系统，通过对运检变电各类数据进行统一汇集和分析，根据所采集的状态信息量进行单一状态信息量预警和综合状态信息量预警，并对各种预警方式的预警算法进行设计，提高了电流互感器预警的可靠性，帮助变电站运维人员提前发现电流互感器问题进行处理。
The invention relates to an active early warning method and system for a current transformer. Through the unified collection and analysis of various data of operation inspection and substation, the single state information volume early warning and the comprehensive state information volume early warning are carried out according to the collected state information volume. The early warning algorithms of various early warning methods are designed to improve the reliability of the current transformer early warning, and help the substation operation and maintenance personnel to find the current transformer problems in advance and deal with them.
Description
技术领域technical field
本发明涉及变电站运行检查相关技术领域，尤其涉及一种针对变电站中的电流互感器主动预警的判断方法及系统。The invention relates to the technical field related to the operation inspection of substations, in particular to a judgment method and system for active early warning of current transformers in substations.
背景技术Background technique
目前，变电站运检工作主要通过设备监控与运检人员人工巡检的方式联合开展。位于安全I区的主设备监控系统对变电主设备的运行数据进行采集，位于安全III区的辅助设备监控系统对辅助设备进行数据采集。主辅设备信息在运检工作站集中展示，当出现故障和异常时报警，监控系统提醒运检人员到问题现场进行进一步的判断和处理。与此同时，运检人员定期对各类变电设备进行运维巡视、带电检测、停电试验等，对设备的状态进行全面的巡检。At present, the inspection work of substations is mainly carried out through equipment monitoring and manual inspection by inspection personnel. The main equipment monitoring system located in the safety zone I collects the operation data of the main substation equipment, and the auxiliary equipment monitoring system located in the safety zone III collects the data of the auxiliary equipment. The main and auxiliary equipment information is displayed in a centralized manner in the inspection workstation. When a fault or abnormality occurs, an alarm is issued, and the monitoring system reminds the inspection personnel to go to the problem site for further judgment and processing. At the same time, the inspection personnel regularly conduct operation and maintenance inspections, live detection, and power outage tests on various substation equipment, and conduct comprehensive inspections on the status of the equipment.
由于目前变电站内各类设备内部感知技术不完善、监视手段不全，部分在线监测数据准确性差、实效性不强，难以准确反映设备实际状况。站内积累的主辅设备监测数据缺乏有效的管理和分析手段，无法对设备状态进行自动分析评估，异常发生时需人工综合各类信息进行筛选、评价，工作量大、效率低、准确性不可控。并且还同时存在各类监控系统独立、界面分散、设备覆盖不全、主辅设备信息无法有效共享的问题，通过多种监测手段获取的设备运行数据无法有效利用，各种主设备故障问题无法提前预警，造成设备故障甚至停运，对变电站运行造成极大威胁；同时变电运维人员对设备缺乏有效监控手段，大量工作靠人工控制，设备产生异常状态或故障后，故障判断和处理主要依赖人为经验，反应时间长，处理效率低、效果差，通过运检人员无法对设备状态准备诊断，无法有效避免故障发生。Due to the imperfect internal sensing technology and incomplete monitoring methods of various equipment in the substation, some online monitoring data have poor accuracy and low effectiveness, and it is difficult to accurately reflect the actual status of the equipment. The main and auxiliary equipment monitoring data accumulated in the station lacks effective management and analysis methods, and it is impossible to automatically analyze and evaluate the equipment status. When an abnormality occurs, various types of information need to be manually screened and evaluated. The workload is large, the efficiency is low, and the accuracy is uncontrollable. . At the same time, there are also problems such as independent monitoring systems, scattered interfaces, incomplete equipment coverage, and inability to effectively share the information of main and auxiliary equipment. The equipment operation data obtained through various monitoring methods cannot be effectively used, and various main equipment failure problems cannot be warned in advance. , resulting in equipment failure or even outage, posing a great threat to the operation of the substation; at the same time, the substation operation and maintenance personnel lack effective monitoring methods for the equipment, and a lot of work relies on manual control. Experience, long response time, low processing efficiency and poor effect, the inspection personnel cannot prepare the diagnosis of the equipment status, and the failure cannot be effectively avoided.
发明内容SUMMARY OF THE INVENTION
针对上述问题，本发明提出一种电流互感器主动预警的判断方法及系统。通过坚持数据共享理念、充分发挥“云大物移链”等信息化技术手段，充分整合站内主辅设备运行信息，利用站内监控主机边缘计算能力，完成运检变电各类数据统一汇集和分析，建立电流互感器主动预警模型，收集变电电力互感器的全维度状态数据，应用各类判别规则及模型，自动分析设备基本信息、实时运行状态、在线监测、带电检测、反措排查、不良工况、缺陷、检修、试验等数据，进行自主诊断并提前发出预警，实现设备智能管理、智能诊断及主动预警功能，辅助运检人员进行设备预警、缺陷分析及决策处理。对设备问题进行提前发现和处置异常，提高电网和设备安全水平。In view of the above problems, the present invention proposes a judgment method and system for active early warning of a current transformer. By adhering to the concept of data sharing, giving full play to the information technology means such as "cloud big things and moving chains", fully integrating the operation information of the main and auxiliary equipment in the station, and using the edge computing capabilities of the monitoring host in the station to complete the unified collection and analysis of various data of operation inspection and substation, Establish an active early warning model for current transformers, collect full-dimensional status data of substation power transformers, apply various discrimination rules and models, and automatically analyze basic equipment information, real-time operating status, online monitoring, live detection, countermeasures, and bad conditions. , defects, maintenance, test and other data, carry out self-diagnosis and issue early warning, realize the functions of equipment intelligent management, intelligent diagnosis and active early warning, and assist inspection personnel in equipment early warning, defect analysis and decision-making. Detect equipment problems in advance and deal with abnormalities to improve the safety level of power grids and equipment.
为达到上述目的，根据本发明的一个方面，提供了一种电流互感器主动预警方法，包括：In order to achieve the above purpose, according to one aspect of the present invention, an active early warning method for a current transformer is provided, including:
获取多维表征电流互感器状态的状态信息量；Obtain the state information quantity representing the state of the current transformer in multiple dimensions;
根据所述状态信息量进行综合状态信息量预警：According to the state information volume, comprehensive state information volume early warning is performed:
在所选取的主要状态信息量超出第一预警阈值时，进行红色预警；When the amount of selected main state information exceeds the first warning threshold, a red warning is performed;
在所选取的主要状态信息量未超出第一预警阈值时，参考辅助状态信息量的状态，根据预设规则进行红色预警、黄色预警和蓝色预警中的一种预警。When the selected main state information amount does not exceed the first warning threshold, referring to the state of the auxiliary state information amount, one of red warning, yellow warning and blue warning is performed according to a preset rule.
进一步的，所述红色预警表示需立刻采取措施，黄色预警表示需加强监视或进一步分析，蓝色预警表示需关注或跟踪分析。Further, the red early warning indicates that measures need to be taken immediately, the yellow warning indicates that monitoring or further analysis needs to be strengthened, and the blue warning indicates that attention or follow-up analysis is required.
进一步的，所述综合状态信息量预警，包括放电缺陷预警、绝缘受潮缺陷预警和接头过热缺陷预警。Further, the comprehensive state information amount early warning includes early warning of discharge defect, early warning of insulation moisture defect and early warning of joint overheating defect.
进一步的，所述放电缺陷预警中，所述主要状态信息量包括乙炔含量，所述辅助状态信息量包括氢气、总烃、油位和油压，所述第一阈值为1ppm，包括：Further, in the discharge defect warning, the main state information includes acetylene content, the auxiliary state information includes hydrogen, total hydrocarbons, oil level and oil pressure, and the first threshold is 1 ppm, including:
当乙炔含量≥1ppm时，发出红色预警；When the acetylene content is greater than or equal to 1ppm, a red warning is issued;
当0.1ppm≤乙炔含量<1ppm时，参考辅助状态信息量的状态：When 0.1ppm≤acetylene content<1ppm, refer to the state of auxiliary state information:
当所述辅助状态信息量中的至少一项超出各自的预警阈值时，发出红色预警；When at least one item of the auxiliary state information exceeds the respective warning thresholds, a red warning is issued;
当所述辅助状态信息量中的所有项均为正常状态时，发出蓝色预警；When all items in the auxiliary state information amount are in normal state, a blue warning is issued;
当所述辅助状态信息量的状态为除上述情况的其他状态时，发出黄色预警。When the state of the auxiliary state information amount is other than the above-mentioned state, a yellow warning is issued.
进一步的，所述绝缘受潮缺陷预警中，所述主要状态信息量包括氢气含量，所述辅助状态信息量包括微水、总烃、油位、油压和相对介损，所述第一阈值为150ppm，包括：Further, in the insulation moisture defect warning, the main state information includes hydrogen content, the auxiliary state information includes micro water, total hydrocarbons, oil level, oil pressure and relative dielectric loss, and the first threshold is 150ppm, including:
当氢气含量≥150ppm时，发出红色预警；When the hydrogen content is greater than or equal to 150ppm, a red warning is issued;
当10ppm≤乙炔含量<150ppm时，参考辅助状态信息量的状态：When 10ppm≤acetylene content<150ppm, refer to the state of auxiliary state information:
当所述辅助状态信息量中的至少一项超出各自的预警阈值时，发出红色预警；When at least one item of the auxiliary state information exceeds the respective warning thresholds, a red warning is issued;
当所述辅助状态信息量中的所有项均为正常状态时，发出蓝色预警；When all items in the auxiliary state information amount are in normal state, a blue warning is issued;
当所述辅助状态信息量的状态为除上述情况的其他状态时，发出黄色预警。When the state of the auxiliary state information amount is other than the above-mentioned state, a yellow warning is issued.
进一步的，所述接头过热缺陷预警中，所述主要状态信息量包括红外热点温度，所述辅助状态信息量包括实时负荷电流和环境温度，所述第一阈值为80℃，包括：Further, in the joint overheating defect early warning, the main status information includes infrared hotspot temperature, the auxiliary status information includes real-time load current and ambient temperature, and the first threshold is 80°C, including:
当红外热点温度≥80℃时，发出红色预警；When the temperature of the infrared hot spot is ≥80℃, a red warning is issued;
当环境温度+10℃≤红外热点温度<80℃时，参考辅助状态信息量的状态：When the ambient temperature +10℃≤infrared hot spot temperature<80℃, refer to the status of auxiliary status information:
根据所述实时负荷电流和环境温度换算出100％线路负荷电流条件下的温度TN；Convert the temperature TN under the condition of 100% line load current according to the real-time load current and ambient temperature;
当TN≥110℃时，发出黄色预警；When TN≥110℃, a yellow warning will be issued;
当TN<110℃时，发出蓝色预警。When TN<110℃, a blue warning is issued.
进一步的，所述综合状态信息量预警之前，还包括单一状态信息量预警：Further, before the comprehensive state information volume early warning, it also includes a single state information volume early warning:
当单一状态信息量预警中的状态信息量超出第二预警阈值时，发出红色预警，否则，进入综合状态信息量预警。When the state information volume in the single state information volume warning exceeds the second warning threshold, a red warning is issued, otherwise, the comprehensive state information volume warning is entered.
根据本发明的另一个方面，提供一种电流互感器主动预警系统，包括状态信息量获取模块、单一状态信息量预警模块、以及综合状态信息量预警模块；其中，According to another aspect of the present invention, an active early warning system for a current transformer is provided, including a state information volume acquisition module, a single state information volume early warning module, and a comprehensive state information volume early warning module; wherein,
所述状态信息量获取模块，获取多维表征电流互感器状态的状态信息量，并将其输出至所述单一状态信息量预警模块和综合状态信息量预警模块；The state information volume acquisition module acquires the state information volume representing the state of the current transformer in multiple dimensions, and outputs it to the single state information volume early warning module and the comprehensive state information volume early warning module;
所述单一状态信息量预警模块，当单一状态信息量预警中的状态信息量超出第二预警阈值时，发出红色预警，否则，进入综合状态信息量预警模块；The single state information volume early warning module, when the state information volume in the single state information volume early warning exceeds the second early warning threshold, a red early warning is issued, otherwise, the integrated state information volume early warning module is entered;
所述综合状态信息量预警模块，在所选取的主要状态信息量超出第一预警阈值时，进行红色预警；在所选取的主要状态信息量未超出第一预警阈值时，参考辅助状态信息量的状态，根据预设规则进行红色预警、黄色预警和蓝色预警中的一种预警。The comprehensive state information amount early warning module, when the selected main state information amount exceeds the first early warning threshold, performs a red early warning; when the selected main state information amount does not exceed the first early warning threshold, refer to the auxiliary state information amount. Status, according to preset rules, one of red warning, yellow warning and blue warning will be issued.
进一步的，所述红色预警表示需立刻采取措施，黄色预警表示需加强监视或进一步分析，蓝色预警表示需关注或跟踪分析。Further, the red early warning indicates that measures need to be taken immediately, the yellow warning indicates that monitoring or further analysis needs to be strengthened, and the blue warning indicates that attention or follow-up analysis is required.
进一步的，所述综合状态信息量预警模块包括放电缺陷预警模块、绝缘受潮缺陷预警模块和接头过热缺陷预警模块。Further, the comprehensive state information amount early warning module includes a discharge defect early warning module, an insulation moisture defect early warning module and a joint overheating defect early warning module.
综上所述，本发明提供了一种电流互感器主动预警方法及系统，通过对运检变电各类数据进行统一汇集和分析，根据所采集的状态信息量进行单一状态信息量预警和综合状态信息量预警，并对各种预警方式的预警算法进行设计，提高了电流互感器预警的可靠性，帮助变电站运维人员提前发现电流互感器问题进行处理。To sum up, the present invention provides an active early warning method and system for a current transformer. By collecting and analyzing all kinds of data of transportation, inspection and substation uniformly, early warning and synthesis of a single state information amount are carried out according to the collected state information amount. Status information amount early warning, and the early warning algorithm of various early warning methods is designed, which improves the reliability of the current transformer early warning, and helps the substation operation and maintenance personnel to find the current transformer problem in advance and deal with it.
附图说明Description of drawings
图1是本发明电流互感器主动预警方法应用的变电运维班一体化监控系统的结构示意图；1 is a schematic structural diagram of an integrated monitoring system for substation operation and maintenance to which the current transformer active early warning method of the present invention is applied;
图2是本发明第一实施例电流互感器主动预警方法的实施流程图；Fig. 2 is the implementation flow chart of the active early warning method of the current transformer according to the first embodiment of the present invention;
图3是本发明另一实施例电流互感器主动预警方法的实施流程图；Fig. 3 is the implementation flow chart of the active early warning method of the current transformer according to another embodiment of the present invention;
图4是本发明电流互感器主动预警系统的结构框图。FIG. 4 is a structural block diagram of the current transformer active early warning system of the present invention.
具体实施方式Detailed ways
为使本发明的目的、技术方案和优点更加清楚明了，下面结合具体实施方式并参照附图，对本发明进一步详细说明。应该理解，这些描述只是示例性的，而并非要限制本发明的范围。此外，在以下说明中，省略了对公知结构和技术的描述，以避免不必要地混淆本发明的概念。In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concepts of the present invention.
下面对本发明的技术方案进行详细说明，本发明提供了一种电流互感器主动预警方法及系统。图1示出了本发明电流互感器主动预警方法以及系统应用的变电运维班一体化监控系统的结构示意图，如图1所示，该电流互感器主动预警系统部署在电力系统安全IV区，通过接入站端的巡检主机和视频监控主机，以及电力系统安全II区的主辅设备一体化监控主机，获得表征电流互感器状态的信息。电力系统安全II区的主辅设备一体化监控主机通过正向隔离系统接入电流互感器主动预警系统。The technical solution of the present invention is described in detail below. The present invention provides an active early warning method and system for a current transformer. Figure 1 shows a schematic structural diagram of the current transformer active early warning method and the substation operation and maintenance integrated monitoring system applied by the system of the present invention. As shown in Figure 1, the current transformer active early warning system is deployed in the power system safety zone IV , Through the access to the inspection host and video monitoring host at the station, and the integrated monitoring host of the main and auxiliary equipment in the power system safety zone II, the information characterizing the status of the current transformer can be obtained. The integrated monitoring host of the main and auxiliary equipment in the power system safety zone II is connected to the active early warning system of the current transformer through the positive isolation system.
根据本发明的一个实施例，提供了一种电流互感器主动预警方法，该方法的实施流程图如图2所示，包括：According to an embodiment of the present invention, an active early warning method for a current transformer is provided. The implementation flowchart of the method is shown in FIG. 2 , including:
获取多维表征电流互感器状态的状态信息量。其中所涉及的状态信息量，为通过对直接或间接表征设备状态的各类信息，包括以下几种类型状态量：Obtain the state information quantity that characterizes the state of the current transformer in multiple dimensions. The amount of state information involved is various types of information that directly or indirectly represent the state of the equipment, including the following types of state quantities:
(1)基础数据：设备的基础信息主要包括：铭牌参数、型式试验报告、出厂试验报告等。(1) Basic data: The basic information of the equipment mainly includes: nameplate parameters, type test report, factory test report, etc.
(2)运行信息：设备的运行信息主要包括：设备运行工况记录信息、历年缺陷及异常记录、电压电流信息等。(2) Operation information: The operation information of the equipment mainly includes: record information of equipment operation conditions, records of defects and abnormalities over the years, voltage and current information, etc.
(3)巡检信息：设备的巡检数据主要包括：红外、油位巡检等信息。(3) Inspection information: The inspection data of the equipment mainly includes: infrared, oil level inspection and other information.
(4)检修数据：设备各类检测、缺陷等信息。(4) Maintenance data: various types of equipment inspections, defects and other information.
(5)在线监测数据：设备的各类在线监测所获信息。(5) Online monitoring data: Information obtained from various online monitoring of equipment.
根据所述状态信息量进行综合状态信息量预警：According to the state information volume, comprehensive state information volume early warning is performed:
在所选取的主要状态信息量超出第一预警阈值时，进行红色预警；When the amount of selected main state information exceeds the first warning threshold, a red warning is performed;
在所选取的主要状态信息量未超出第一预警阈值时，参考辅助状态信息量的状态，根据预设规则进行红色预警、黄色预警和蓝色预警中的一种预警。When the selected main state information amount does not exceed the first warning threshold, referring to the state of the auxiliary state information amount, one of red warning, yellow warning and blue warning is performed according to a preset rule.
电流互感器主动预警级别总体上分为三级，按照对设备安全运行影响的严重性和紧急程度，将主动预警信号颜色分为蓝色预警、黄色预警和红色预警三类，针对不同的预警级别，采取不同的应急、检测及检修策略。其中，红色预警表示设备的状态信息量超过相关标准限值，或变化趋势明显，设备可能存在缺陷，并有可能发展为故障，急需采取相应措施。黄色预警表示设备状态信息量的变化趋势朝着标准限值方向发展，但未超过标准限值，设备可能存在隐患，需加强监视或进一步的分析评估。蓝色预警表示设备单一或部分状态信息量异常,暂不影响设备运行，设备处于仅需关注或跟踪分析的状态。The active early warning levels of current transformers are generally divided into three levels. According to the severity and urgency of the impact on the safe operation of the equipment, the colors of the active early warning signals are divided into three categories: blue early warning, yellow early warning and red early warning. , adopt different emergency, detection and maintenance strategies. Among them, the red warning indicates that the amount of status information of the equipment exceeds the relevant standard limit, or the change trend is obvious, the equipment may be defective, and may develop into a failure, and corresponding measures need to be taken urgently. The yellow warning indicates that the change trend of the equipment status information volume is developing towards the standard limit value, but does not exceed the standard limit value, the equipment may have hidden dangers, and it is necessary to strengthen monitoring or further analysis and evaluation. The blue warning indicates that the information amount of a single or part of the state of the device is abnormal, which does not affect the operation of the device for the time being, and the device is in a state that only needs attention or tracking analysis.
为了体现上述表征电流互感器状态的状态信息量的重要程度，将各状态信息的类型分为以下两种：In order to reflect the importance of the above-mentioned state information representing the state of the current transformer, the types of each state information are divided into the following two types:
主要状态信息量：在进行综合状态信息量预警时，达到阈值后能够启动主动预警流程的状态信息量。Main state information volume: when comprehensive state information volume warning is performed, the state information volume that can start the active warning process after reaching the threshold.
辅助状态信息量：在进行综合状态信息量预警时，在预警流程中参与判断预警级别的状态信息量。Auxiliary state information volume: When conducting comprehensive state information volume early warning, it participates in judging the state information volume of the warning level in the early warning process.
上述表征电流互感器状态的状态信息量的数据来源如表1所示：The data sources of the above state information representing the state of the current transformer are shown in Table 1:
表1Table 1
根据某些实施例，所述综合状态信息量预警，包括放电缺陷预警、绝缘受潮缺陷预警和接头过热缺陷预警。下面对各种预警方式的预测策略进行详细说明。According to some embodiments, the comprehensive state information amount early warning includes a discharge defect early warning, an insulation moisture defect early warning, and a joint overheating defect early warning. The forecasting strategies of various early warning methods are described in detail below.
与放电缺陷产生原因的相关因素有：内部含气泡、杂质颗粒、绝缘损伤等缺陷，电位悬浮、内部放电、开路、松动等内部缺陷，末屏内部连接不良。在放电缺陷预警中，主要状态信息量为乙炔含量，辅助状态信息量为氢气、总烃、油位和油压，所述第一阈值为1，包括：The factors related to the causes of discharge defects are: internal defects such as bubbles, impurity particles, and insulation damage, internal defects such as potential suspension, internal discharge, open circuit, and looseness, and poor internal connection of the end screen. In the early warning of discharge defects, the main state information quantity is acetylene content, and the auxiliary state information quantity is hydrogen, total hydrocarbons, oil level and oil pressure, and the first threshold value is 1, including:
当乙炔含量≥1ppm时，发出红色预警；运检策略为尽快停电检修，停电前加强巡检；When the acetylene content is greater than or equal to 1ppm, a red warning will be issued; the inspection strategy is to cut off the power as soon as possible, and strengthen the inspection before the power cut;
当0.1ppm≤乙炔含量<1ppm时，参考辅助状态信息量的状态：When 0.1ppm≤acetylene content<1ppm, refer to the state of auxiliary state information:
当所述辅助状态信息量中的至少一项超出各自的预警阈值时，发出红色预警；运检策略为尽快停电检修，停电前加强巡检；When at least one item of the auxiliary state information exceeds the respective early warning threshold, a red early warning is issued; the operation inspection strategy is to power outage maintenance as soon as possible, and strengthen patrol inspection before power outage;
当所述辅助状态信息量中的所有项均为正常状态时，发出蓝色预警；运检策略为持续跟踪，关注乙炔变化趋势；When all the items in the auxiliary state information are in normal state, a blue warning is issued; the transportation inspection strategy is to continuously track and pay attention to the change trend of acetylene;
当所述辅助状态信息量的状态为除上述情况的其他状态时，发出黄色预警；运检策略为持续跟踪、缩短取油色谱分析周期、加强红外、油位专业巡检等。When the state of the auxiliary state information is other than the above, a yellow warning is issued; the transportation inspection strategy is continuous tracking, shortening the oil extraction chromatographic analysis cycle, strengthening infrared, and professional inspection of oil level, etc.
与放电缺陷预警相关的主要状态量、辅助状态量、预警级别、运检策略等信息如表2所示：The main state quantities, auxiliary state quantities, warning levels, and inspection strategies related to discharge defect warning are shown in Table 2:
表2Table 2
与绝缘受潮缺陷产生原因的相关因素有：外部进水、金属膨胀器安装工艺控制不良，干燥工艺控制不良。在绝缘受潮缺陷预警中，主要状态信息量为氢气含量，辅助状态信息量为微水、总烃、油位、油压和相对介损，第一阈值为150，包括：The factors related to the causes of insulation moisture defects are: external water ingress, poor control of the installation process of the metal expander, and poor control of the drying process. In the early warning of insulation moisture defect, the main state information is hydrogen content, and the auxiliary state information is micro water, total hydrocarbon, oil level, oil pressure and relative dielectric loss. The first threshold is 150, including:
当氢气含量≥150ppm时，发出红色预警，运检策略为尽快停电检修，停电前加强巡检；When the hydrogen content is greater than or equal to 150ppm, a red warning will be issued. The operation inspection strategy is to cut off the power as soon as possible for maintenance, and strengthen the inspection before the power cut;
当10ppm≤乙炔含量<150ppm时，参考辅助状态信息量的状态：When 10ppm≤acetylene content<150ppm, refer to the state of auxiliary state information:
当所述辅助状态信息量中的至少一项超出各自的预警阈值时，发出红色预警，运检策略为尽快停电检修，停电前加强巡检；When at least one item of the auxiliary state information exceeds the respective early warning threshold, a red early warning is issued, and the operation inspection strategy is to power outage maintenance as soon as possible, and strengthen patrol inspection before power outage;
当所述辅助状态信息量中的所有项均为正常状态时，发出蓝色预警，运检策略为持续跟踪，关注氢气变化趋势；When all items in the auxiliary state information volume are in normal state, a blue warning is issued, and the operation and inspection strategy is continuous tracking, paying attention to the change trend of hydrogen;
当所述辅助状态信息量的状态为除上述情况的其他状态时，发出黄色预警，运检策略为持续跟踪、缩短取油色谱分析周期、加强红外、油位专业巡检等。When the state of the auxiliary state information amount is other than the above situation, a yellow warning is issued, and the transportation inspection strategy is continuous tracking, shortening the oil extraction chromatographic analysis cycle, strengthening infrared, and professional oil level inspection.
与绝缘受潮缺陷预警相关的主要状态量、辅助状态量、预警级别、运检策略等信息如表3所示：The main state quantity, auxiliary state quantity, warning level, transportation inspection strategy and other information related to the early warning of insulation moisture defects are shown in Table 3:
表3table 3
与接头过热缺陷产生原因的相关因素有：串、并联排连接不良，负荷电流过大，接头接触不良。在接头过热缺陷预警中主要状态信息量为红外热点温度，辅助状态信息量为实时负荷电流和环境温度，第一阈值为80，包括：The factors related to the causes of overheating defects of the joints are: poor connection of the series and parallel rows, excessive load current, and poor contact of the joints. In the early warning of connector overheating defect, the main state information is infrared hot spot temperature, and the auxiliary state information is real-time load current and ambient temperature. The first threshold is 80, including:
当红外热点温度≥80℃时，发出红色预警；运检策略为尽快停电检修，停电前加强巡检；When the temperature of the infrared hot spot is ≥80℃, a red warning will be issued; the inspection strategy is to cut off the power as soon as possible, and strengthen the inspection before the power cut;
当环境温度+10℃≤红外热点温度<80℃时，参考辅助状态信息量的状态：When the ambient temperature +10℃≤infrared hot spot temperature<80℃, refer to the status of auxiliary status information:
根据所述实时负荷电流和环境温度换算出100％线路负荷电流条件下的温度TN；Convert the temperature TN under the condition of 100% line load current according to the real-time load current and ambient temperature;
当TN≥110℃时，发出黄色预警；运检策略为持续跟踪、加强巡检，参考相对温差分析，迎峰度夏前选择合适时间停电处理When TN ≥ 110°C, a yellow warning will be issued; the inspection strategy is to continuously track and strengthen inspections, referring to the analysis of relative temperature difference, and choose a suitable time before the peak summer to deal with the power outage
当TN<110℃时，发出蓝色预警；运检策略为持续跟踪，关注热点温度变化趋势。When TN is less than 110℃, a blue warning will be issued; the inspection strategy is to keep tracking and pay attention to the trend of temperature changes in hot spots.
与接头过热缺陷预警相关的主要状态量、辅助状态量、预警级别、运检策略等信息如表4所示：The main state quantities, auxiliary state quantities, warning levels, and inspection strategies related to the early warning of joint overheating defects are shown in Table 4:
表4Table 4
根据本发明另一个实施例，在综合状态信息量预警之前，还包括单一状态信息量预警，该实施例中预警方法的实施流程图如图3所示，包括：According to another embodiment of the present invention, before the comprehensive state information volume early warning, it also includes a single state information volume early warning. The implementation flowchart of the early warning method in this embodiment is shown in FIG. 3 , including:
当单一状态信息量预警中的状态信息量超出第二预警阈值时，发出红色预警，否则，进入综合状态信息量预警。When the state information volume in the single state information volume warning exceeds the second warning threshold, a red warning is issued, otherwise, the comprehensive state information volume warning is entered.
根据该实施例所提供的电流互感器单一状态信息量预警相关的预警分类、状态量、预警规则、以及运检策略如表5所示：The early warning classification, state quantity, early warning rule, and operation inspection strategy related to the single state information quantity early warning of the current transformer provided according to this embodiment are shown in Table 5:
表5table 5
根据本发明的第三个实施例，提供一种电流互感器主动预警系统，包括状态信息量获取模块、单一状态信息量预警模块、以及综合状态信息量预警模块；其中，According to a third embodiment of the present invention, an active early warning system for a current transformer is provided, including a state information volume acquisition module, a single state information volume early warning module, and a comprehensive state information volume early warning module; wherein,
所述状态信息量获取模块，获取多维表征电流互感器状态的状态信息量，并将其输出至所述单一状态信息量预警模块和综合状态信息量预警模块；The state information volume acquisition module acquires the state information volume representing the state of the current transformer in multiple dimensions, and outputs it to the single state information volume early warning module and the comprehensive state information volume early warning module;
所述单一状态信息量预警模块，当单一状态信息量预警中的状态信息量超出第二预警阈值时，发出红色预警，否则，进入综合状态信息量预警模块；The single state information volume early warning module, when the state information volume in the single state information volume early warning exceeds the second early warning threshold, a red early warning is issued, otherwise, the integrated state information volume early warning module is entered;
所述综合状态信息量预警模块，在所选取的主要状态信息量超出第一预警阈值时，进行红色预警；在所选取的主要状态信息量未超出第一预警阈值时，参考辅助状态信息量的状态，根据预设规则进行红色预警、黄色预警和蓝色预警中的一种预警。其中，所述综合状态信息量预警模块包括放电缺陷预警模块、绝缘受潮缺陷预警模块和接头过热缺陷预警模块。The comprehensive state information amount early warning module, when the selected main state information amount exceeds the first early warning threshold, performs a red early warning; when the selected main state information amount does not exceed the first early warning threshold, refer to the auxiliary state information amount. Status, according to preset rules, one of red warning, yellow warning and blue warning will be issued. Wherein, the comprehensive state information amount early warning module includes a discharge defect early warning module, an insulation moisture defect early warning module and a joint overheating defect early warning module.
上述预警系统中，各个预警模块实施如本发明第一和第二实施例中所述的预警方法，在此不再赘述。In the above-mentioned early-warning system, each early-warning module implements the early-warning methods described in the first and second embodiments of the present invention, which will not be repeated here.
综上所述，本发明涉及一种提供了一种电流互感器主动预警方法及系统，通过部署在电力安全IV区的电流互感器主动预警系统，通过接入设备的基础信息、运行信息、巡检信息、检修数据、在线监测等数据，按照对设备安全运行影响的严重性和紧急程度，将电流互感器预警类别分为绝缘受潮缺陷预警、放电性缺陷预警、接头过热缺陷预警等。并将主动预警信号颜色分为蓝色预警、黄色预警和红色预警三类，针对不同的预警级别，采取不同的应急、检测及检修策略。电流互感器的主动预警形式分为单一状态量的单一预警以及多状态量的综合预警。状态信息量如超出单一状态量预警规则要求值则红色预警，如不超出单一状态量预警规则要求值，则进行综合状态信息量预警。系统通过多个监控子系统，接入电流互感器设备多源异构监测数据，在系统中进行主动预警算法分析。通过对各类电流互感器状态信息的多维度分析，得出辅助决策。在电流互感器出现故障前，提前预警，辅助运维人员做出应急、检测或检修决策。To sum up, the present invention relates to a method and system for providing an active early warning of a current transformer. Through the active early warning system of the current transformer deployed in the power safety zone IV, the basic information, operation According to the severity and urgency of the impact on the safe operation of the equipment, the current transformer early warning categories are divided into insulation moisture defect early warning, discharge defect early warning, joint overheating defect early warning, etc. The colors of active early warning signals are divided into three categories: blue early warning, yellow early warning and red early warning. Different emergency, detection and maintenance strategies are adopted for different warning levels. The active early warning forms of current transformers are divided into single early warning of a single state quantity and comprehensive early warning of multiple state quantities. If the status information exceeds the required value of the single status warning rule, a red warning will be issued. If the status information does not exceed the required value of the single status warning rule, the comprehensive status information warning will be carried out. The system accesses multi-source heterogeneous monitoring data of current transformer equipment through multiple monitoring subsystems, and conducts active early warning algorithm analysis in the system. Through the multi-dimensional analysis of the state information of various current transformers, auxiliary decision-making is obtained. Before the failure of the current transformer, the early warning is given to assist the operation and maintenance personnel to make emergency, inspection or maintenance decisions.
应当理解的是，本发明的上述具体实施方式仅仅用于示例性说明或解释本发明的原理，而不构成对本发明的限制。因此，在不偏离本发明的精神和范围的情况下所做的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。此外，本发明所附权利要求旨在涵盖落入所附权利要求范围和边界、或者这种范围和边界的等同形式内的全部变化和修改例。It should be understood that the above-mentioned specific embodiments of the present invention are only used to illustrate or explain the principle of the present invention, but not to limit the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and scope of the present invention should be included within the protection scope of the present invention. Furthermore, the appended claims of this invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalents of such scope and boundaries.
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