CN104316891A - Electronic mutual inductor performance real-time monitoring system and method - Google Patents
Electronic mutual inductor performance real-time monitoring system and method Download PDFInfo
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Abstract
本发明涉及一种电子式互感器性能实时监测系统及方法，属于电力系统自动化技术领域。本发明首先同步采集变电站内常规互感器和电子式互感器的保护、测量、计量电压电流量以及电子式互感器的自身的状态信息；然后根据设定的时间间隔比对常规互感器和电子式互感器相同相别采样数据的幅值差和相位差，判断二者的幅值和相位差是否在设定的允许范围内，若有幅值差或相位差超过设定的范围，则对幅值差或相位差进行计算并发出告警信息，同时记录下此时电子式互感器自身的状态信息，从而实现对电子式互感器的实时监测。本发明简单、易实施，能够实时监测电子式互感器，为考核电子式互感器现场运行的可靠性和长期稳定性提供了丰富的数据支撑。
The invention relates to a real-time monitoring system and method for the performance of an electronic transformer, which belongs to the technical field of electric power system automation. The invention first synchronously collects the protection, measurement and metering voltage and current of the conventional transformer and the electronic transformer in the substation and the state information of the electronic transformer itself; then compares the conventional transformer and the electronic transformer according to the set time interval The amplitude difference and phase difference of the same and different sampling data of the transformers, judge whether the amplitude and phase difference of the two are within the set allowable range, if there is an amplitude difference or phase difference exceeding the set range, then the amplitude difference Calculate the value difference or phase difference and issue an alarm message, and record the status information of the electronic transformer itself at this time, so as to realize real-time monitoring of the electronic transformer. The invention is simple and easy to implement, can monitor the electronic transformer in real time, and provides rich data support for assessing the reliability and long-term stability of the electronic transformer on site.
Description
技术领域technical field
本发明涉及一种电子式互感器性能实时监测系统及方法，属于电力系统自动化技术领域。The invention relates to a real-time monitoring system and method for the performance of an electronic transformer, which belongs to the technical field of electric power system automation.
背景技术Background technique
随着光电子、光纤通信和数字信号处理技术的发展和应用，基于不同方式、不同采集原理的电子式互感器应运而生。电子式互感器做为智能变电站信息化、数字化、自动化、互动化任务的关键设备之一，是为电力系统电能计量、继电保护设备、测控设备等提供电压电流信号的重要设备，其运行稳定性和可靠性与电力系统的安全、可靠、经济运行密切相关。With the development and application of optoelectronics, optical fiber communication and digital signal processing technology, electronic transformers based on different methods and different acquisition principles have emerged as the times require. As one of the key equipment for informatization, digitalization, automation and interactive tasks of smart substations, electronic transformers are important equipment for providing voltage and current signals for power system energy metering, relay protection equipment, measurement and control equipment, etc., and its operation is stable. Safety and reliability are closely related to the safe, reliable and economical operation of the power system.
2010至2012年电子式互感器在国内进行了大规模的应用，尽管电子式互感器产品都通过了型式试验和出厂试验，但是电子式互感器在实验室内和现场运行中性能表现存在不一致，缺乏长期运行考验，导致现场实际运行过程中可靠性和长期稳定性较差，故障率较高的缺陷集中爆发，严重影响了电力系统的安全运行，电子式互感器应用也陷入停滞阶段。后续智能变电站工程建设仍然采用常规互感器，导致电子式互感器实用化进度缓慢，截止目前智能变电站中电子式互感器的应用率不足10％。From 2010 to 2012, electronic transformers were widely used in China. Although electronic transformers have passed the type test and factory test, there are inconsistencies in the performance of electronic transformers in the laboratory and on-site operation. The lack of long-term operation test has led to poor reliability and long-term stability in the actual operation process on site, and the concentrated outbreak of defects with high failure rate has seriously affected the safe operation of the power system, and the application of electronic transformers has also stagnated. Subsequent smart substation engineering construction still uses conventional transformers, resulting in slow progress in the practical application of electronic transformers. Up to now, the application rate of electronic transformers in smart substations is less than 10%.
近年来针对电子式互感器应用中暴露的问题，相关设备厂家和科研机构在可靠性、稳定性、试验手段、标准规范等方面进行了完善，使得电子式互感器产品逐步成熟。为了验证、监测不同厂家、不同原理的经技术提升后的电子式互感器在现场运行时的产品性能，设计出一种电子式互感器性能实时监测方法是电子式互感器和智能变电站工程实践过程中必然的需求，也是电子式互感器在电力系统中应用推广的必然需求。In recent years, in response to the problems exposed in the application of electronic transformers, related equipment manufacturers and scientific research institutions have improved reliability, stability, test methods, and standard specifications, making electronic transformer products gradually mature. In order to verify and monitor the product performance of electronic transformers from different manufacturers and different principles that have been upgraded by technology when they are running on site, a real-time monitoring method for the performance of electronic transformers is designed. It is an inevitable demand in the power system, and it is also an inevitable demand for the application and promotion of electronic transformers in power systems.
发明内容Contents of the invention
本发明的目的是提供一种电子式互感器性能实时监测系统及方法，以改变目前电子式互感器经过技术提升后、现场运行经验匮乏的问题。The purpose of the present invention is to provide a real-time monitoring system and method for the performance of electronic transformers, so as to solve the problem of lack of experience in field operation of electronic transformers after technical improvement.
本发明为解决上述技术问题而提供一种电子式互感器性能实时监测系统，该实时监测系统包括数字量采集合并单元、模拟量采集合并单元、时间同步装置和实时监测装置，The present invention provides a real-time monitoring system for electronic transformer performance in order to solve the above technical problems. The real-time monitoring system includes a digital quantity collection and merging unit, an analog quantity collection and merging unit, a time synchronization device and a real-time monitoring device.
所述数字量采集合并单元用于采集变电站内运行的电子式互感器的保护、测量、计量电压电流量和互感器自身的状态信息，并将其输出给实时监测装置；The digital quantity collection and merging unit is used to collect the protection, measurement, metering voltage and current of the electronic transformer operating in the substation and the status information of the transformer itself, and output it to the real-time monitoring device;
所述模拟量采集合并单元用于采集变电站内运行的常规互感器的保护、测量、计量电压电流量，并将其输出至实时监测装置；The analog quantity collection and merging unit is used to collect the protection, measurement and metering voltage and current of conventional transformers running in the substation, and output them to the real-time monitoring device;
所述时间同步装置用于同时发送3路同步信号分别至数字量采集合并单元、模拟量采集合并单元和实时监测装置，以保证数字量采集合并单元、模拟量采集合并单元和实时监测装置的时钟统一；The time synchronization device is used to simultaneously send 3 synchronous signals to the digital quantity collection and merging unit, the analog quantity collection and merging unit and the real-time monitoring device respectively, so as to ensure the clocks of the digital quantity collection and merging unit, the analog quantity collection and merging unit and the real-time monitoring device Unite;
所述实时监测装置用于根据设定的时间间隔对比常规互感器和电子式互感器相同相别采样数据的幅值差和相位差，若存在采样数据的幅值差或相位差超过设定值，则进行告警。The real-time monitoring device is used to compare the amplitude difference and phase difference of the same and different sampling data of the conventional transformer and the electronic transformer according to the set time interval, if the amplitude difference or phase difference of the sampling data exceeds the set value , an alarm is issued.
所述实时监测装置通过光纤点对点连接数字量采集合并单元和模拟量采集合并单元。The real-time monitoring device connects the digital quantity collection and merging unit and the analog quantity collection and merging unit point-to-point through the optical fiber.
所述时间同步装置分别通过光纤连接至数字量采集合并单元、模拟量采集合并单元和实时监测装置。The time synchronization device is respectively connected to the digital quantity collection and merging unit, the analog quantity collection and merging unit and the real-time monitoring device through optical fibers.
所述实时监测装置的硬件基于高速数据总线，包括光纤采集卡、嵌入式CPU板卡和存储设备。The hardware of the real-time monitoring device is based on a high-speed data bus, including an optical fiber acquisition card, an embedded CPU board and a storage device.
所述实时监测装置的软件模块采用嵌入式操作系统，包括数据采集模块、通讯处理模块、服务端数据处理模块和客户端数据输出模块。The software module of the real-time monitoring device adopts an embedded operating system, including a data acquisition module, a communication processing module, a server data processing module and a client data output module.
本发明为解决上述技术问题还提供了一种电子式互感器性能实时监测方法，该监测方法包括以下步骤：In order to solve the above technical problems, the present invention also provides a real-time monitoring method for the performance of an electronic transformer, which includes the following steps:
1)同步采集变电站内常规互感器和电子式互感器的保护、测量、计量电压电流量以及电子式互感器的自身的状态信息；1) Synchronously collect the protection, measurement, metering voltage and current of conventional transformers and electronic transformers in substations and the state information of electronic transformers themselves;
2)根据设定的时间间隔比对常规互感器和电子式互感器相同相别采样数据的幅值差和相位差，判断二者的幅值和相位差是否在设定的允许范围内；2) Compare the amplitude difference and phase difference of the same and different sampling data of the conventional transformer and the electronic transformer according to the set time interval, and judge whether the amplitude and phase difference of the two are within the set allowable range;
3)若有幅值差或相位差超过设定的范围，则对幅值差或相位差进行计算并发出告警信息，同时记录下此时电子式互感器自身的状态信息。3) If the amplitude difference or phase difference exceeds the set range, calculate the amplitude difference or phase difference and issue an alarm message, and record the state information of the electronic transformer itself at this time.
所述步骤2)中设定的时间间隔的最小值不小于20ms。The minimum value of the time interval set in step 2) is not less than 20ms.
所述步骤2)在对采样数据进行比对之前还需对采集到数据采用快速傅里叶变换算法、加二阶汉宁卷积窗校正方法以及拉格朗日插值计算方法进行处理，以得到挂网电子式互感器和正常运行常规互感器输出的保护、测量、计量通道数据的精确幅值和精确相位。In the step 2) before comparing the sampled data, it is necessary to process the collected data using the fast Fourier transform algorithm, adding a second-order Hanning convolution window correction method, and a Lagrangian interpolation calculation method to obtain The precise amplitude and precise phase of the protection, measurement, and metering channel data output by the grid-connected electronic transformer and the normal operation conventional transformer.
本发明的有益效果是:本发明首先同步采集变电站内常规互感器和电子式互感器的保护、测量、计量电压电流量以及电子式互感器的自身的状态信息；然后根据设定的时间间隔比对常规互感器和电子式互感器相同相别采样数据的幅值差和相位差，判断二者的幅值和相位差是否在设定的允许范围内，若有幅值差或相位差超过设定的范围，则对幅值差或相位差进行计算并发出告警信息，同时记录下此时电子式互感器自身的状态信息，从而实现对电子式互感器的实时监测。本发明简单、易实施，能够实时监测电子式互感器，为考核电子式互感器现场运行的可靠性和长期稳定性提供了丰富的数据支撑。The beneficial effects of the present invention are: the present invention at first synchronously collects the protection, measurement, metering voltage and current of conventional transformers and electronic transformers in substations and the state information of the electronic transformers themselves; then according to the set time interval ratio For the amplitude difference and phase difference of the same sampling data of the conventional transformer and the electronic transformer, judge whether the amplitude and phase difference of the two are within the set allowable range, if there is an amplitude difference or phase difference exceeding the set If it is within a certain range, the amplitude difference or phase difference is calculated and an alarm message is issued, and the status information of the electronic transformer itself is recorded at the same time, so as to realize real-time monitoring of the electronic transformer. The invention is simple and easy to implement, can monitor the electronic transformer in real time, and provides rich data support for assessing the reliability and long-term stability of the electronic transformer on site.
附图说明Description of drawings
图1是本发明电子式互感器性能实时监测系统的结构框图；Fig. 1 is the structural block diagram of electronic transformer performance real-time monitoring system of the present invention;
图2是本发明电子式互感器性能实时监测系统的硬件逻辑框图；Fig. 2 is the hardware logic block diagram of electronic transformer performance real-time monitoring system of the present invention;
图3是本发明电子式互感器性能实时监测系统的软件逻辑框图；Fig. 3 is the software logic block diagram of electronic transformer performance real-time monitoring system of the present invention;
图4是本发明实施例中电子式互感器性能实时监测方法的流程图。Fig. 4 is a flowchart of a method for real-time monitoring of electronic transformer performance in an embodiment of the present invention.
具体实施方式Detailed ways
下面结合附图对本发明的具体实施方式作进一步的说明。The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
本发明的一种电子式互感器性能实时监测系统的实施例An embodiment of a real-time monitoring system for electronic transformer performance of the present invention
如图1所示，本发明的电子式互感器性能实时监测系统包括模拟量采集合并单元、数字量采集合并单元、时间同步装置和实时监测装置，时间同步装置通过光纤分别与实时监测装置、数字量采集合并单元和模拟量采集合并单元连接，模拟量采集合并单元和数字量采集合并单元的输出端通过光纤连接至实时监测装置的输入端。As shown in Figure 1, the electronic transformer performance real-time monitoring system of the present invention includes an analog quantity acquisition and merging unit, a digital quantity acquisition and merging unit, a time synchronization device and a real-time monitoring device, and the time synchronization device is respectively connected with the real-time monitoring device, the digital The quantity collection and merging unit is connected with the analog quantity collection and merging unit, and the output terminals of the analog quantity collection and merging unit and the digital quantity collection and merging unit are connected to the input terminal of the real-time monitoring device through optical fiber.
模拟量采集合并单元的输入端通过电缆连接至变电站内实时运行的常规互感器的绕组，采集常规互感器的保护、测量和计量电压电流量，并转换为符合IEC61850-9-2LE标准的数字量输出至实时监测装置，数字量采集合并单元输入端通过光缆连接至变电站内挂网运行的电子式互感器，采集电子式互感器的保护、测量、计量电压电流量和互感器自身的状态信息(如温度、振动、光口功率等)，并输出符合IEC61850-9-2LE标准的数字量输出至实时监测装置。时间同步装置用于为实时监测装置、数字量采集合并单元和模拟量采集合并单元发送光B码标准同步信号，以保证2套合并单元采样数据同步和实时监测装置的时钟统一。The input end of the analog acquisition merging unit is connected to the winding of the real-time running conventional transformer in the substation through a cable, collects the protection, measurement and metering voltage and current of the conventional transformer, and converts it into a digital quantity conforming to the IEC61850-9-2LE standard Output to the real-time monitoring device, the input end of the digital quantity acquisition and merging unit is connected to the electronic transformer running on the grid in the substation through an optical cable, and collects the protection, measurement, metering voltage and current of the electronic transformer and the state information of the transformer itself ( Such as temperature, vibration, optical port power, etc.), and output digital output conforming to the IEC61850-9-2LE standard to the real-time monitoring device. The time synchronization device is used to send the optical B-code standard synchronization signal for the real-time monitoring device, the digital quantity acquisition merging unit and the analog quantity acquisition merging unit, so as to ensure the synchronization of the sampling data of the 2 sets of merging units and the clock unity of the real-time monitoring device.
实时检测装置通过光纤点对点连接上述两太合并单元，接收上述2台合并单元传输来的IEC 61850-9-2LE采样值报文数据和GOOSE报文，数据采集模块通过内部高速总线把采集到的数据传输给服务端数据处理模块，服务端数据处理模块中的数据合成对比软件功能采用快速傅里叶变换算法、加二阶汉宁卷积窗校正方法以及拉格朗日插值计算方法，得到挂网电子式互感器和正常运行常规互感器输出的保护、测量、计量通道数据的精确幅值和精确相位，并根据设定的对比时间间隔如20ms(可整定)对2路互感器的相同相别幅值相位进行对比，如果幅值或相位误差在定值允许范围内，实时监测装置通过数据存储软件模块对数据进行连续记录存储；如果误差超过定值，软件对幅值差或相位差进行计算并发出告警信息，计算结果和告警信息本地存储，同时软件记录下电子式互感器自身状态信息(如温度、振动、光口功率等)并存储。存储信息采用COMTRADE标准格式，具有通用性，可用不同的分析工具解析。The real-time detection device connects the above two merging units point-to-point through optical fiber, receives the IEC 61850-9-2LE sampling value message data and GOOSE message transmitted by the two merging units above, and the data acquisition module collects the collected data through the internal high-speed bus It is transmitted to the server-side data processing module. The data synthesis and comparison software function in the server-side data processing module adopts the fast Fourier transform algorithm, the second-order Hanning convolution window correction method and the Lagrangian interpolation calculation method to obtain the hanging network. The precise amplitude and precise phase of the protection, measurement, and metering channel data output by the electronic transformer and the normal operation conventional transformer, and the same phase difference between the two transformers according to the set comparison time interval such as 20ms (adjustable) The amplitude and phase are compared, if the amplitude or phase error is within the allowable range of the fixed value, the real-time monitoring device will continuously record and store the data through the data storage software module; if the error exceeds the fixed value, the software will calculate the amplitude difference or phase difference And send out alarm information, the calculation results and alarm information are stored locally, and the software records and stores the state information of the electronic transformer itself (such as temperature, vibration, optical port power, etc.). The stored information adopts COMTRADE standard format, which is universal and can be analyzed by different analysis tools.
实时监测装置硬件基于高速数据总线，包括千兆光纤采集卡、高性能嵌入式CPU板卡和大容量存储设备，并可外接打印机、液晶显示器、键盘、鼠标等设备，装置的硬件架构如图2所示。实时监测装置软件采用嵌入式操作系统，软件模块由数据采集模块、通讯处理模块、服务端数据处理模块和客户端数据输出模块，其软件架构如图3所示。实时监测装置客户端数据输出模块具有显示、管理、分析功能，运维人员可离线或在线分析监测装置存储的挂网电子式互感器和运行中常规互感器输出各参量的幅值、相位、数据波形、幅值差、相位差、告警等信息，可自动生成监测报告。实时监测装置通信服务模块与监控主站进行信息交互，存储信息可以通过通信服务模块上传至远方监控主站，通信规约既支持IEC61850间隔层通信规约也兼容标准103规约。The hardware of the real-time monitoring device is based on a high-speed data bus, including a gigabit fiber optic acquisition card, a high-performance embedded CPU board and a large-capacity storage device, and can be connected to an external printer, liquid crystal display, keyboard, mouse and other equipment. The hardware structure of the device is shown in Figure 2 shown. The software of the real-time monitoring device adopts an embedded operating system. The software modules are composed of a data acquisition module, a communication processing module, a server data processing module and a client data output module. The software architecture is shown in Figure 3. The client data output module of the real-time monitoring device has the functions of display, management and analysis. The operation and maintenance personnel can analyze the amplitude, phase and data of each parameter output by the grid-connected electronic transformer stored in the monitoring device and the conventional transformer in operation offline or online. Waveform, amplitude difference, phase difference, alarm and other information can automatically generate monitoring reports. The communication service module of the real-time monitoring device interacts with the monitoring master station, and the stored information can be uploaded to the remote monitoring master station through the communication service module. The communication protocol supports both the IEC61850 compartment layer communication protocol and the standard 103 protocol.
运维人员通过该套系统可以定期在变电站内或远方监控主站对变电站现场挂网运行电子式互感器的监测比对信息进行提取和分析，评估由于环境温度，互感器附近振动以及互感器内部自身状态变化信息等对互感器安全运行产生的影响，为考核电子式互感器现场运行的可靠性和长期稳定性提供了丰富的数据支撑。Through this system, the operation and maintenance personnel can regularly monitor the main station in the substation or remotely to extract and analyze the monitoring and comparison information of the electronic transformers running on the grid in the substation, and evaluate the environmental temperature, vibration near the transformer and the internal transformer. The influence of its own state change information on the safe operation of the transformer provides a wealth of data support for evaluating the reliability and long-term stability of the electronic transformer's field operation.
本发明的一种电子式互感器性能实时监测方法的实施例An embodiment of a real-time monitoring method for the performance of an electronic transformer of the present invention
本发明的电子式互感器性能实时监测方法通过比较变电站内挂网电子式互感器和正常运行常规互感器输出的保护、测量、计量通道数据的精确幅值和精确相位来实现对电子式互感器的监测。下面以变电站1个间隔为例来说明本发明电子式互感器性能实时监测方法的具体实现过程，其流程如图4所示，具体实施过程如下。The electronic transformer performance real-time monitoring method of the present invention realizes the electronic transformer by comparing the precise amplitude and precise phase of the protection, measurement and metering channel data output by the electronic transformer connected to the grid in the substation and the conventional transformer in normal operation. monitoring. The specific implementation process of the electronic transformer performance real-time monitoring method of the present invention is described below by taking one interval of a substation as an example. The process is shown in Figure 4, and the specific implementation process is as follows.
1.采集常规互感器的保护、测量、计量电压电流量，同步采集电子式互感器的保护、测量、计量电压电流量和互感器自身的状态信息(如温度、振动、光口功率等)。其中常规互感器的采集可使用模拟量采集合并单元，将模拟量采集合并单元的输入端通过电缆连接至变电站内实时运行的常规互感器的绕组，从而实现对常规互感器数据的采集；电子式互感器的采集可采用数字量采集合并单元，将数字量采集合并单元的输入端通过光缆连接至变电站内挂网运行的电子式互感器。1. Collect the protection, measurement and metering voltage and current of conventional transformers, and simultaneously collect the protection, measurement and metering voltage and current of electronic transformers and the state information of the transformer itself (such as temperature, vibration, optical port power, etc.). Among them, the acquisition of conventional transformers can use the analog quantity acquisition and merging unit, and the input end of the analog quantity acquisition and merging unit is connected to the winding of the conventional transformer running in real time in the substation through a cable, so as to realize the acquisition of conventional transformer data; electronic The acquisition of the transformer can use a digital quantity acquisition and merging unit, and the input end of the digital quantity acquisition and merging unit is connected to the electronic transformer running on the network in the substation through an optical cable.
2.对采集得到常规互感器和电子式互感器的数据进行处理，以得到挂网电子式互感器和正常运行常规互感器输出的保护、测量、计量通道数据的精确幅值和精确相位；然后根据设定的对比时间间隔如2oms(可整定)对上述两路互感器的相同相别幅值和相位进行对比，如果幅值和相位误差在定值允许范围内，则对数据进行连续记录存储，否则，如果存在误差超过定值，对幅值差或相位差进行计算并发出告警信息，对计算结果和告警信息进行本地存储，同时记录电子式互感器自身状态信息(如温度、振动、光口功率等)。2. Process the collected data of conventional transformers and electronic transformers to obtain the precise amplitude and precise phase of the protection, measurement, and metering channel data output by the grid-connected electronic transformers and normal operation conventional transformers; and then According to the set comparison time interval such as 2oms (adjustable), compare the same phase amplitude and phase of the above two transformers. If the amplitude and phase errors are within the allowable range of the fixed value, the data will be continuously recorded and stored. , otherwise, if there is an error exceeding the fixed value, calculate the amplitude difference or phase difference and issue an alarm message, store the calculation results and alarm information locally, and record the state information of the electronic transformer itself (such as temperature, vibration, light mouth power, etc.).
本实施例采用实时监测装置对采集到的常规互感器和电子式互感器的数据进行处理和对比分析，实时监测装置硬件基于高速数据总线，包括千兆光纤采集卡、高性能嵌入式CPU板卡和大容量存储设备，并可外接打印机、液晶显示器、键盘、鼠标等设备，装置的硬件架构如图2所示。实时监测装置软件采用嵌入式操作系统，软件模块由数据采集模块、通讯处理模块、服务端数据处理模块和客户端数据输出模块，其软件架构如图3所示。实时监测装置中的数据采集模块通过光纤以太网接口，接收2台合并单元传输来的IEC 61850-9-2LE采样值报文数据和GOOSE报文，数据采集模块通过内部高速总线把采集到的数据传输给服务端数据处理模块，服务端数据处理模块中的数据合成对比软件功能采用快速傅里叶变换算法、加二阶汉宁卷积窗校正方法以及拉格朗日插值计算方法，得到挂网电子式互感器和正常运行常规互感器输出的保护、测量、计量通道数据的精确幅值和精确相位，比对常规互感器和电子式互感器相同相别采样数据的幅值差和相位差，最小时间间隔不小于20ms，比对过程中采样数据的幅值差和相位差超过设定的定值时实时监测装置会产生告警信息，并记录下告警时刻的幅值差和相位差以及电子式互感器自身的状态信息，监测信息和比对分析结果可本地存储展示并上传至监控主站。In this embodiment, a real-time monitoring device is used to process and compare and analyze the data collected from conventional transformers and electronic transformers. The hardware of the real-time monitoring device is based on a high-speed data bus, including a gigabit fiber acquisition card and a high-performance embedded CPU board. And large-capacity storage devices, and external printers, liquid crystal displays, keyboards, mice and other equipment, the hardware architecture of the device is shown in Figure 2. The software of the real-time monitoring device adopts an embedded operating system. The software modules are composed of a data acquisition module, a communication processing module, a server data processing module and a client data output module. The software architecture is shown in Figure 3. The data acquisition module in the real-time monitoring device receives the IEC 61850-9-2LE sampling value message data and GOOSE message transmitted by the two merging units through the optical fiber Ethernet interface, and the data acquisition module transmits the collected data through the internal high-speed bus It is transmitted to the server-side data processing module. The data synthesis and comparison software function in the server-side data processing module adopts the fast Fourier transform algorithm, the second-order Hanning convolution window correction method and the Lagrangian interpolation calculation method to obtain the hanging network. The precise amplitude and precise phase of the protection, measurement and metering channel data output by the electronic transformer and the normal operation conventional transformer, compared with the amplitude difference and phase difference of the same sampling data of the conventional transformer and the electronic transformer, The minimum time interval is not less than 20ms. When the amplitude difference and phase difference of the sampling data during the comparison process exceed the set value, the real-time monitoring device will generate an alarm message, and record the amplitude difference and phase difference at the alarm time and the electronic The status information of the transformer itself, monitoring information and comparison analysis results can be stored and displayed locally and uploaded to the monitoring master station.
上面结合附图对本发明专利的实施进行了描述，但是本发明专利并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本发明专利的启示下，在不脱离本发明专利宗旨和权利要求所保护的范围情况下，还可做出很多形式，这些均属于本发明专利的保护范围之内。The implementation of the patent of the present invention has been described above in conjunction with the accompanying drawings, but the patent of the present invention is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are only illustrative, rather than restrictive. Those of ordinary skill in the art Under the enlightenment of the patent of the present invention, many forms can also be made without departing from the scope of protection of the patent of the present invention and the claims, and these all belong to the protection scope of the patent of the present invention.
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