WO2023164965A1 - 一种储能系统中直流绝缘监测方法及终端 - Google Patents
一种储能系统中直流绝缘监测方法及终端 Download PDFInfo
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- WO2023164965A1 WO2023164965A1 PCT/CN2022/080273 CN2022080273W WO2023164965A1 WO 2023164965 A1 WO2023164965 A1 WO 2023164965A1 CN 2022080273 W CN2022080273 W CN 2022080273W WO 2023164965 A1 WO2023164965 A1 WO 2023164965A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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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
Definitions
- the invention relates to the technical field of energy storage systems, in particular to a DC insulation monitoring method and terminal in an energy storage system.
- the insulation fault is only reported for reference by the operation and maintenance technicians, without in-depth analysis of the obtained insulation value, and there is no long-term monitoring of the change of the insulation resistance value, so that the insulation value cannot be checked.
- Pre-judgment and investigation of low voltage, insulation alarm, line aging, etc. will affect the overall stability and security of the system.
- the technical problem to be solved by the present invention is to provide a DC insulation monitoring method and terminal in an energy storage system, so as to improve the safety and stability of the system.
- a DC insulation monitoring method in an energy storage system comprising the steps of:
- step S1 Obtain the insulation value of each time period of the day for a single insulation device, and judge whether the insulation value of each time period of the day meets the difference condition of the day. If it is satisfied, upload the alarm information, and if it is not satisfied, perform step S2;
- a DC insulation monitoring terminal in an energy storage system comprising a memory, a processor, and a computer program stored on the memory and operable on the processor, and the processor implements the following steps when executing the computer program:
- step S1 Obtain the insulation value of each time period of the day for a single insulation device, and judge whether the insulation value of each time period of the day meets the difference condition of the day. If it is satisfied, upload the alarm information, and if it is not satisfied, perform step S2;
- the beneficial effects of the present invention are: a DC insulation monitoring method and terminal in an energy storage system, which analyzes the collected insulation value to analyze whether the insulation value suddenly drops on the same day, and analyzes the long-term decline of the insulation value, and according to The analysis results provide alarm information, inform manual intervention analysis, check the cause of excessive insulation value changes, whether it is insulation equipment failure or external force intervention on the line, verify on-site safety information, and notify the operation and maintenance personnel to make plans in advance and process the line in a planned way : Such as the replacement of aging cables, equipment dust cleaning, etc., which improves the security and stability of the system.
- Fig. 1 is a schematic flowchart of a DC insulation monitoring method in an energy storage system according to an embodiment of the present invention
- Fig. 2 is a schematic structural diagram of an energy storage system with a super master terminal according to an embodiment of the present invention
- Fig. 3 is a schematic structural diagram of an energy storage system without a super master terminal according to an embodiment of the present invention
- Fig. 4 is a schematic structural diagram of a DC insulation monitoring terminal in an energy storage system according to an embodiment of the present invention.
- a DC insulation monitoring terminal in an energy storage system 2. A processor; 3. A memory.
- a DC insulation monitoring method in an energy storage system including steps:
- step S1 Obtain the insulation value of each time period of the day for a single insulation device, and judge whether the insulation value of each time period of the day meets the difference condition of the day. If it is satisfied, upload the alarm information, and if it is not satisfied, perform step S2;
- the beneficial effects of the present invention are: by analyzing the collected insulation value, it is analyzed whether the insulation value suddenly drops on the same day, and the long-term decline of the insulation value is analyzed, and an alarm message is proposed according to the analysis result to inform the manual Intervene in the analysis to find out the reason for the excessive change of the insulation value, whether the insulation equipment is faulty or the line is interfered by external forces, verify the on-site safety information, notify the operation and maintenance personnel to make plans in advance, and carry out line treatment in a planned way: such as the replacement of aging cables, Equipment dust cleaning, etc., improve the security and stability of the system.
- each insulation monitoring module is controlled to perform polling and monitoring in sequence.
- controlling each insulation monitoring module to perform polling and monitoring in sequence specifically, controlling each insulation monitoring module to calibrate and time every set time, and controlling each insulation monitoring module to monitor according to the set monitoring time, each The set monitoring times of the insulation monitoring modules are staggered from each other.
- the energy storage system includes at least one branch system, the branch system includes a PCS insulation monitoring module and a BMS insulation monitoring module, and further includes the steps of:
- the system difference condition is that the PCS insulation value Rp and the BMS insulation value Rb satisfy
- a DC insulation monitoring terminal in an energy storage system including a memory, a processor, and a computer program stored on the memory and operable on the processor, the processor implements the following steps when executing the computer program :
- step S1 Obtain the insulation value of each time period of the day for a single insulation device, and judge whether the insulation value of each time period of the day meets the difference condition of the day. If it is satisfied, upload the alarm information, and if it is not satisfied, perform step S2;
- the beneficial effects of the present invention are: by analyzing the collected insulation value, it is analyzed whether the insulation value suddenly drops on the same day, and the long-term decline of the insulation value is analyzed, and an alarm message is proposed according to the analysis result to inform the manual Intervene in the analysis to find out the reason for the excessive change of the insulation value, whether the insulation equipment is faulty or the line is interfered by external forces, verify the on-site safety information, notify the operation and maintenance personnel to make plans in advance, and carry out line treatment in a planned way: such as the replacement of aging cables, Equipment dust cleaning, etc., improve the security and stability of the system.
- each insulation monitoring module is controlled to perform polling and monitoring in sequence.
- controlling each insulation monitoring module to perform polling and monitoring in sequence specifically, controlling each insulation monitoring module to calibrate and time every set time, and controlling each insulation monitoring module to monitor according to the set monitoring time, each The set monitoring times of the insulation monitoring modules are staggered from each other.
- the energy storage system includes at least one branch system, the branch system includes a PCS insulation monitoring module and a BMS insulation monitoring module, and further includes the steps of:
- the system difference condition is that the PCS insulation value Rp and the BMS insulation value Rb satisfy
- the invention is applied to the insulation monitoring of the energy storage system, and performs analysis and alarm according to the result of the insulation monitoring, so as to ensure the stable operation of the system.
- embodiment one of the present invention is:
- the system architecture determines that multiple insulation monitoring modules cannot work at the same time in the entire energy storage system, because whether it is the low-frequency injection method or the balanced bridge method, when multiple insulation monitoring Interfere with each other, resulting in false positives, making the system inoperable.
- a super main control unit in this embodiment, specifically the EMS energy management system, communicate with each unit to control, number all units, and then perform patrol insulation testing according to the numbering sequence , so as to solve the mutual interference caused by the simultaneous activation of the insulation detection of the battery and the insulation detection of the PCS, resulting in a low detected insulation resistance, false alarms of insulation faults, and multiple PCSs (without isolation transformers) used in parallel, sharing a total Isolation transformer, and the generated edge detection is enabled at the same time to generate mutual interference, resulting in a low detected insulation resistance and false alarms for insulation faults.
- the EMS energy management system sets the insulation detection cycle once every 10s:
- the staggered time may not be controlled by the main control unit. It is only necessary to synchronize the time of each system (for example, once a day at 0 o'clock), and then set the time in advance. Stagger the time of each insulation detection, so that only one unit insulation detection can be performed at the same time, avoiding interference, and can reduce the load of the main control unit and reduce the pressure of sending and receiving data.
- Each subsystem internally controls the insulation detection function of PCS and BMS to turn on and off through the energy management system to ensure that only one of them is performing insulation detection at the same time.
- the machine time is used as the reference, and the time is adjusted once a day at 0:00 to ensure that the time is consistent, and then each of them staggers the insulation detection time according to the set time, so as to avoid false alarms of insulation faults during simultaneous incoming line detection.
- the EMS controls the entire system to power off for protection, and displays that the specific corresponding unit has an insulation fault, and further investigation is required.
- the insulation monitoring module in this embodiment includes a PCS insulation monitoring module and a BMS insulation monitoring module, please refer to FIG. 1, a DC insulation monitoring method in an energy storage system, which includes steps:
- the system difference condition is that the insulation value Rp of the PCS and the insulation value Rb of the BMS satisfy
- the isolation sampling line at the sampling/BMS terminal is faulty or the sampling is inaccurate, and repaired.
- A can be 40%, for example, and the specific value can be set according to actual needs.
- step S1 Obtain the insulation value of each time period of the day for a single insulation device, and judge whether the insulation value of each time period of the day meets the difference condition of the day. If yes, upload an alarm message; if not, execute step S2.
- every day is divided into N time periods, and an insulation value R1, R2, •••Rn is collected for each time period, and the day-to-day difference condition is specifically
- B can be 20%, for example, and the specific value can be set according to actual needs.
- an insulation value change curve is formed in days, and analyzed according to the decline rate of the curve. For example, when it is predicted that the insulation value will drop to the critical point of 500 ⁇ /V after 30 days, the EMS upload insulation will soon When the critical point information is reached, the operation and maintenance personnel are notified to make plans in advance, and carry out line processing in a planned way: such as replacement of aging cables, dust cleaning of equipment, etc., to ensure reliable operation of the system.
- embodiment two of the present invention is:
- a DC insulation monitoring terminal 1 in an energy storage system including a memory 3, a processor 2, and a computer program stored in the memory 3 and operable on the processor 2, when the processor 2 executes the computer program, it realizes the first embodiment above step.
- the present invention provides a DC insulation monitoring method and terminal in an energy storage system.
- the collected insulation value By analyzing the collected insulation value, it analyzes whether the insulation value suddenly drops on the same day, and analyzes the long-term decline of the insulation value. And according to the analysis results, alarm information is raised, and manual intervention is notified to analyze the cause of excessive changes in insulation value, whether it is insulation equipment failure or external force intervention on the line, verifies the on-site safety information, and informs the operation and maintenance personnel to make plans in advance and carry out the line in a planned way.
- Treatment such as the replacement of aging cables, equipment dust cleaning, etc., to improve the security and stability of the system.
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- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
本发明公开了一种储能系统中直流绝缘监测方法及终端，包括步骤：S1、获取单个绝缘装置的当日各个时间段的绝缘值，判断当日各个时间段的绝缘值是否满足当日差异条件，满足则上传告警信息，不满足则执行步骤S2；S2、根据当日各个时间段的绝缘值，计算日绝缘平均值，并将日绝缘平均值进行存储；步骤S3、根据存储的各个日绝缘平均值，拟合曲线并判断曲线下降速率，当判断绝缘值将在设定时间内抵达临界点，则上传即将到达临界点信息。其通过对采集的绝缘值进行分析，分析是否当日发生绝缘值突然下降，以及分析绝缘值长期的下降情况，并提出告警信息，提高了系统的安全性和稳定性。
Description
本发明涉及储能系统技术领域，特别涉及一种储能系统中直流绝缘监测方法及终端。
随着储能行业高速发展，大功率PCS多台并联共用一个隔离变压器方案越来越多，而储能系统中，系统绝缘值是一个非常重要的参数，该参数影响系统安全性，稳定性和操作人员生命安全。
现有技术中，仅是将绝缘故障进行上报，以供运维技术人员进行参考，并未对获取的绝缘值进行深入分析，也并未制定长期监测绝缘阻值的变化，从而无法对绝缘值过低、绝缘告警、线路老化等做提前预判、排查，影响系统整体的稳定性和安全性。
本发明所要解决的技术问题是：提供一种储能系统中直流绝缘监测方法及终端，以提高系统的安全性和稳定性。
为了解决上述技术问题，本发明采用的技术方案为：
一种储能系统中直流绝缘监测方法，包括步骤：
S1、获取单个绝缘装置的当日各个时间段的绝缘值，判断当日各个时间段的绝缘值是否满足当日差异条件，满足则上传告警信息，不满足则执行步骤S2；
S2、根据当日各个时间段的绝缘值，计算日绝缘平均值，并将日绝缘平均值进行存储；
S3、根据存储的各个日绝缘平均值，拟合曲线并判断曲线下降速率，当判断绝缘值将在设定时长内抵达临界点，则上传即将到达临界点信息。
为了解决上述技术问题，本发明采用的另一种技术方案为：
一种储能系统中直流绝缘监测终端，包括存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，所述处理器执行所述计算机程序时实现以下步骤：
包括步骤：
S1、获取单个绝缘装置的当日各个时间段的绝缘值，判断当日各个时间段的绝缘值是否满足当日差异条件，满足则上传告警信息，不满足则执行步骤S2；
S2、根据当日各个时间段的绝缘值，计算日绝缘平均值，并将日绝缘平均值进行存储；
S3、根据存储的各个日绝缘平均值，拟合曲线并判断曲线下降速率，当判断绝缘值将在设定时长内抵达临界点，则上传即将到达临界点信息。
本发明的有益效果在于：一种储能系统中直流绝缘监测方法及终端，其通过对采集的绝缘值进行分析，分析是否当日发生绝缘值突然下降，以及分析绝缘值长期的下降情况，并根据分析结果提出告警信息，告知人工介入分析，排查绝缘值变化过大原因，是绝缘设备故障还是线路被外力干预，核实现场安全信息，通知运维人员提前做好规划，有计划地进行线路的处理：如老化线缆的更换，设备灰尘清理等，提高了系统的安全性和稳定性。
图1为本发明实施例的一种储能系统中直流绝缘监测方法的流程示意图；
图2为本发明实施例涉及的具有超级主控终端的储能系统的结构示意图；
图3为本发明实施例涉及的不具有超级主控终端的储能系统的结构示意图；
图4为本发明实施例的一种储能系统中直流绝缘监测终端的结构示意图。
标号说明：
1、一种储能系统中直流绝缘监测终端；2、处理器；3、存储器。
为详细说明本发明的技术内容、所实现目的及效果，以下结合实施方式并配合附图予以说明。
请参照图1至图3，一种储能系统中直流绝缘监测方法，包括步骤：
S1、获取单个绝缘装置的当日各个时间段的绝缘值，判断当日各个时间段的绝缘值是否满足当日差异条件，满足则上传告警信息，不满足则执行步骤S2；
S2、根据当日各个时间段的绝缘值，计算日绝缘平均值，并将日绝缘平均值进行存储；
S3、根据存储的各个日绝缘平均值，拟合曲线并判断曲线下降速率，当判断绝缘值将在设定时长内抵达临界点，则上传即将到达临界点信息。
由上述描述可知，本发明的有益效果在于：其通过对采集的绝缘值进行分析，分析是否当日发生绝缘值突然下降，以及分析绝缘值长期的下降情况，并根据分析结果提出告警信息，告知人工介入分析，排查绝缘值变化过大原因，是绝缘设备故障还是线路被外力干预，核实现场安全信息，通知运维人员提前做好规划，有计划地进行线路的处理：如老化线缆的更换，设备灰尘清理等，提高了系统的安全性和稳定性。
进一步地，应用于具有两个及两个以上绝缘监测模块的储能系统，控制各个绝缘监测模块按顺序进行轮询监测。
由上述描述可知，解决多个绝缘检测同时启用产生的相互干扰，导致检测到的绝缘阻值偏低，误报绝缘故障问题。
进一步地，所述控制各个绝缘监测模块按顺序进行轮询监测，具体是控制各个绝缘监测模块每隔设定时间校准对时，并控制各个绝缘监测模块各自按设定监测时间进行监测，每个绝缘监测模块的设定监测时间相互错开。
由上述描述可知，既能同一时间只有1个单元绝缘检测，避免干扰，又能降低主控单元的负荷，减少数据量的收发压力。
进一步地，所述储能系统包括至少一个支路系统，支路系统包括PCS绝缘监测模块和BMS绝缘监测模块，还包括步骤：
S0、获取同一支路系统的PCS绝缘值和BMS绝缘值，判断所述PCS绝缘值和BMS绝缘值是否满足系统差异条件，若满足则上传告警信息。
由上述描述可知，分析同一支路系统的PCS绝缘值和BMS绝缘值的差异，及时告知人工介入分析，排查PCS端的绝缘采样/BMS端的绝缘采样哪条线路出现故障或采样失准，并进行修复，提高运行的稳定性和安全性。
进一步地，所述系统差异条件为PCS绝缘值Rp与BMS绝缘值Rb满足|Rp-Rb|/Rp＞40%，所述当日差异条件具体为|Rmax-Rmin|/Rmin＞20%，式中，Rmax具体是当天采集的绝缘值中的最大值，Rmin具体是当天采集的绝缘值的最小值。
由上述描述可知，实现对差异值的判断。
请参照图4，一种储能系统中直流绝缘监测终端，包括存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，所述处理器执行所述计算机程序时实现以下步骤：
S1、获取单个绝缘装置的当日各个时间段的绝缘值，判断当日各个时间段的绝缘值是否满足当日差异条件，满足则上传告警信息，不满足则执行步骤S2；
S2、根据当日各个时间段的绝缘值，计算日绝缘平均值，并将日绝缘平均值进行存储；
S3、根据存储的各个日绝缘平均值，拟合曲线并判断曲线下降速率，当判断绝缘值将在设定时长内抵达临界点，则上传即将到达临界点信息。
由上述描述可知，本发明的有益效果在于：其通过对采集的绝缘值进行分析，分析是否当日发生绝缘值突然下降，以及分析绝缘值长期的下降情况，并根据分析结果提出告警信息，告知人工介入分析，排查绝缘值变化过大原因，是绝缘设备故障还是线路被外力干预，核实现场安全信息，通知运维人员提前做好规划，有计划地进行线路的处理：如老化线缆的更换，设备灰尘清理等，提高了系统的安全性和稳定性。
进一步地，应用于具有两个及两个以上绝缘监测模块的储能系统，控制各个绝缘监测模块按顺序进行轮询监测。
由上述描述可知，解决多个绝缘检测同时启用产生的相互干扰，导致检测到的绝缘阻值偏低，误报绝缘故障问题。
进一步地，所述控制各个绝缘监测模块按顺序进行轮询监测，具体是控制各个绝缘监测模块每隔设定时间校准对时，并控制各个绝缘监测模块各自按设定监测时间进行监测，每个绝缘监测模块的设定监测时间相互错开。
由上述描述可知，既能同一时间只有1个单元绝缘检测，避免干扰，又能降低主控单元的负荷，减少数据量的收发压力。
进一步地，所述储能系统包括至少一个支路系统，支路系统包括PCS绝缘监测模块和BMS绝缘监测模块，还包括步骤：
S0、获取同一支路系统的PCS绝缘值和BMS绝缘值，判断所述PCS绝缘值和BMS绝缘值是否满足系统差异条件，若满足则上传告警信息。
由上述描述可知，分析同一支路系统的PCS绝缘值和BMS绝缘值的差异，及时告知人工介入分析，排查PCS端的绝缘采样/BMS端的绝缘采样哪条线路出现故障或采样失准，并进行修复，提高运行的稳定性和安全性。
进一步地，所述系统差异条件为PCS绝缘值Rp与BMS绝缘值Rb满足|Rp-Rb|/Rp＞40%，所述当日差异条件具体为|Rmax-Rmin|/Rmin＞20%，式中，Rmax具体是当天采集的绝缘值中的最大值，Rmin具体是当天采集的绝缘值的最小值。
由上述描述可知，实现对差异值的判断。
本发明应用于对储能系统进行绝缘监测，并根据绝缘监测的结果进行分析和告警，保证系统的稳定运行。
请参照图1-4，本发明的实施例一为：
现有技术中，虽然存在绝缘监测装置，但是没有对储能配电系统整体进行监控的方案，要取消某部分的绝缘检测功能（取消PCS绝缘检测，或者取消BMS系统的绝缘检测），否则会报绝缘故障，且取消部分单元的绝缘检测功能导致真发生绝缘故障时无法精确定位绝缘故障位置，另外，并未制定长期监测绝缘阻值的变化，从而对绝缘值过低、绝缘告警、线路老化等做提前预判，排查。
对于具备多个绝缘监测模块的系统，由于系统架构决定了整个储能系统中不能多个绝缘监测模块同时工作，因为无论是低频注入法还是平衡电桥法，多个绝缘监测模块同时工作时会相互干扰，导致误报，使得系统无法运行。
为此，请参照图2，通过一个超级主控单元，再本实施例中，具体是EMS能量管理系统，与各个单元进行通讯控制，对所有单元进行编号，然后按照编号顺序进行轮巡绝缘检测，从而解决电池的绝缘检测与PCS的绝缘检测同时启用产生的相互干扰，导致检测到的绝缘阻值偏低，误报绝缘故障问题和多台PCS（无隔离变压器）并联使用，共用1个总隔离变压器，而产生的缘检测同时启用产生的相互干扰，导致检测到的绝缘阻值偏低，误报绝缘故障问题。
例如，EMS能量管理系统设置绝缘检测周期10s一次：
0：00：00~0：09：59 1#单元进线检测，其他单元关闭；
0：10：00~0：19：59 2#单元进线检测，其他单元关闭；
0：20：00~0：29：59 3#单元进线检测，其他单元关闭；
0：30：00~0：39：59 4#单元进线检测，其他单元关闭；
0：40：00~0：49：59 5#单元进线检测，其他单元关闭；
0：50：00~0：59：59 6#单元进线检测，其他单元关闭；
01：00：00~01：09：59 1#单元进线检测，其他单元关闭，以此循环。
请参照图3，在一个可选的实施例中，也可不通过主控单元控制错开时间，仅需将每个系统进行对时（如每天0点时对时一次），然后按照提前设定好的时间错开各自进行绝缘检测，从而既能同一时间只有1个单元绝缘检测，避免干扰，又能降低主控单元的负荷，减少数据量的收发压力。
每个子系统内部通过能量管理系统，控制PCS和BMS的绝缘检测功能开启与关闭，保证同一时间只有一个在进行绝缘检测，三个能量管理系统（工控机）之间通过交换机连接，以1#工控机时间为基准，每天0：00对时一次，保证时间一致，然后各自按照设定的时间，错开绝缘检测的时间，避免同时进线检测误报绝缘故障。
若中间存在某一单元报绝缘故障，EMS控制整个系统下电保护，并显示具体对应单元发生绝缘故障，需进一步排查。
此外，由于本实施例中绝缘监测模块包括PCS绝缘监测模块和BMS绝缘监测模块，因此，请参照图1，一种储能系统中直流绝缘监测方法，其包括步骤：
S0、获取同一系统的PCS绝缘值和BMS绝缘值，判断所述PCS绝缘值和BMS绝缘值是否满足系统差异条件，若满足则上传告警信息。
具体而言，所述系统差异条件为PCS绝缘值Rp与BMS绝缘值Rb满足|Rp-Rb|/Rp＞A，则EMS上传绝缘差值过大告警信息，告知人工介入分析，排查PCS端的绝缘采样/BMS端的绝缘采样哪条线路出现故障或采样失准，并进行修复。A例如可以是40%，具体数值可以根据实际需求进行设置。
S1、获取单个绝缘装置的当日各个时间段的绝缘值，判断当日各个时间段的绝缘值是否满足当日差异条件，满足则上传告警信息，不满足则执行步骤S2。
具体而言，将每天分成N个时间段，每个时间段采集一个绝缘值R1、R2、•••Rn，所述当日差异条件具体为|Rmax-Rmin|/Rmin＞B，式中，Rmax具体是当天采集的绝缘值中的最大值，Rmin具体是当天采集的绝缘值的最小值。B例如可以是20%，具体数值可以根据实际需求进行设置。
S2、根据当日各个时间段的绝缘值，计算日绝缘平均值，并将日绝缘平均值进行存储。
具体而言，先从当日各个时间段的绝缘值中，去除一个最大值和一个最小值，之后求剩余的当日各个时间段的绝缘值的平均值作为日绝缘平均值。
S3、根据存储的各个日绝缘平均值，拟合曲线并判断曲线下降速率，当判断绝缘值将在设定时长内抵达临界点，则上传即将到达临界点信息。
具体而言，以天为单位，形成一条绝缘值变化曲线，并根据曲线的下降速率进行分析，例如当预判到30天后，绝缘值会降低到500Ω/V的临界点时，EMS上传绝缘即将到达临界点信息，通知运维人员提前做好规划，有计划地进行线路的处理：如老化线缆的更换，设备灰尘清理等，确保系统可靠运行。
请参照图,4，本发明的实施例二为：
一种储能系统中直流绝缘监测终端1，包括存储器3、处理器2及存储在存储器3上并可在处理器2上运行的计算机程序，处理器2执行计算机程序时实现上述实施例一的步骤。
综上所述，本发明提供的一种储能系统中直流绝缘监测方法及终端，其通过对采集的绝缘值进行分析，分析是否当日发生绝缘值突然下降，以及分析绝缘值长期的下降情况，并根据分析结果提出告警信息，告知人工介入分析，排查绝缘值变化过大原因，是绝缘设备故障还是线路被外力干预，核实现场安全信息，通知运维人员提前做好规划，有计划地进行线路的处理：如老化线缆的更换，设备灰尘清理等，提高了系统的安全性和稳定性。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等同变换，或直接或间接运用在相关的技术领域，均同理包括在本发明的专利保护范围内。
Claims (10)
- 一种储能系统中直流绝缘监测方法，其特征在于，包括步骤：S1、获取单个绝缘装置的当日各个时间段的绝缘值，判断当日各个时间段的绝缘值是否满足当日差异条件，满足则上传告警信息，不满足则执行步骤S2；S2、根据当日各个时间段的绝缘值，计算日绝缘平均值，并将日绝缘平均值进行存储；S3、根据存储的各个日绝缘平均值，拟合曲线并判断曲线下降速率，当判断绝缘值将在设定时长内抵达临界点，则上传即将到达临界点信息。
- 根据权利要求1所述的一种储能系统中直流绝缘监测方法，其特征在于，应用于具有两个及两个以上绝缘监测模块的储能系统，控制各个绝缘监测模块按顺序进行轮询监测。
- 根据权利要求2所述的一种储能系统中直流绝缘监测方法，其特征在于，所述控制各个绝缘监测模块按顺序进行轮询监测，具体是控制各个绝缘监测模块每隔设定时间校准对时，并控制各个绝缘监测模块各自按设定监测时间进行监测，每个绝缘监测模块的设定监测时间相互错开。
- 根据权利要求2所述的一种储能系统中直流绝缘监测方法，其特征在于，所述储能系统包括至少一个支路系统，支路系统包括PCS绝缘监测模块和BMS绝缘监测模块，还包括步骤：S0、获取同一支路系统的PCS绝缘值和BMS绝缘值，判断所述PCS绝缘值和BMS绝缘值是否满足系统差异条件，若满足则上传告警信息。
- 根据权利要求4所述的一种储能系统中直流绝缘监测方法，其特征在于，所述系统差异条件为PCS绝缘值Rp与BMS绝缘值Rb满足|Rp-Rb|/Rp＞40%，所述当日差异条件具体为|Rmax-Rmin|/Rmin＞20%，式中，Rmax具体是当天采集的绝缘值中的最大值，Rmin具体是当天采集的绝缘值的最小值。
- 一种储能系统中直流绝缘监测终端，包括存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序，其特征在于，所述处理器执行所述计算机程序时实现以下步骤：包括步骤：S1、获取单个绝缘装置的当日各个时间段的绝缘值，判断当日各个时间段的绝缘值是否满足当日差异条件，满足则上传告警信息，不满足则执行步骤S2；S2、根据当日各个时间段的绝缘值，计算日绝缘平均值，并将日绝缘平均值进行存储；S3、根据存储的各个日绝缘平均值，拟合曲线并判断曲线下降速率，当判断绝缘值将在设定时长内抵达临界点，则上传即将到达临界点信息。
- 根据权利要求6所述的一种储能系统中直流绝缘监测终端，其特征在于，应用于具有两个及两个以上绝缘监测模块的储能系统，控制各个绝缘监测模块按顺序进行轮询监测。
- 根据权利要求7所述的一种储能系统中直流绝缘监测终端，其特征在于，所述控制各个绝缘监测模块按顺序进行轮询监测，具体是控制各个绝缘监测模块每隔设定时间校准对时，并控制各个绝缘监测模块各自按设定监测时间进行监测，每个绝缘监测模块的设定监测时间相互错开。
- 根据权利要求6所述的一种储能系统中直流绝缘监测终端，其特征在于，所述储能系统包括至少一个支路系统，支路系统包括PCS绝缘监测模块和BMS绝缘监测模块，还包括步骤：S0、获取同一支路系统的PCS绝缘值和BMS绝缘值，判断所述PCS绝缘值和BMS绝缘值是否满足系统差异条件，若满足则上传告警信息。
- 根据权利要求6所述的一种储能系统中直流绝缘监测终端，其特征在于，所述系统差异条件为PCS绝缘值Rp与BMS绝缘值Rb满足|Rp-Rb|/Rp＞40%，所述当日差异条件具体为|Rmax-Rmin|/Rmin＞20%，式中，Rmax具体是当天采集的绝缘值中的最大值，Rmin具体是当天采集的绝缘值的最小值。
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| CN117890827A (zh) * | 2024-03-15 | 2024-04-16 | 江苏沃能电气科技有限公司 | 一种基于可视化的绝缘管型母线运行智能监测系统 |
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