GYDZ Electronic Transformer Calibrator This product complies with the national standard 20847.7/8 electronic transformer standard and IEC61850 communication standard. Based on virtual instruments, it can realize the ratio difference between the analog and digital output of electronic transformers. , calibration and recording of angle differences, and can also be applied to the calibration of traditional current and voltage transformers and the offline calibration of electronic transformers. Provide a movable electronic transformer calibration device for the majority of electric power testing, measurement, and construction units.
The electronic transformer calibrator is the most important underlying key equipment of the digital substation. At present, electronic transformers have been applied in demonstration projects of digital substations, showing unique advantages over traditional transformers. However, the principle differences between electronic transformers and traditional transformers also introduce new practical problems in equipment calibration. In current substations, traditional transformers only provide analog current or voltage signals, and A/D conversion is completed by subsequent secondary equipment such as electronic energy meters and protection devices. However, in digital substations, all A/D conversions are performed in Completed in electronic transformer. Due to the use of electronic transformers, the A/D conversion is moved forward and transferred from the original secondary equipment to primary equipment. The characteristics of this new signal conversion process have caused great concern about the long-term operating performance of electronic transformers. This paper The electronic transformer online calibrator produced by the company is developed to observe and understand the long-term operating performance of electronic transformers. Through online calibration, it provides a means of non-power outage and real-time monitoring of electronic transformers, which replaces the previous The regular maintenance method of transformers is changed to the condition maintenance method, thereby discovering potential equipment faults, preventing early equipment failure, and improving equipment operating efficiency.
The electronic transformer calibrator can not only complete the calibration of current transformers, but also can be used to calibrate voltage transformers. The block diagram of its calibration system is shown in Figure 1. The system is divided into current standard channel, voltage standard channel, current measured channel, voltage measured channel, and calibrator data processing platform. The current standard channel consists of a sensing part, a collector, a transmission module, and a power management module. The current measured channel is composed of the calibrated transformer, signal converter, and transmission module. In the absence of power outage, the sensing part converts the current on the transmission line into a voltage signal. The calibrator obtains the electrical parameters of the standard current sensor and the calibrated current sensor through the collector, and uploads these electrical parameters to the computer in a standard format. , The computer data processing platform compares and processes two signals at the same time, calculates the error of the current sensor being calibrated, and displays and records the measurement results. The voltage standard channel consists of a sensing part, a collector, a transmission module, and a power management module. The voltage measured channel is composed of the calibrated transformer, signal converter, and transmission module. The working principle is the same as the current calibration system.
●Conforms to G/T 20847.7 /8, IEC61850-9-1 standards;
●Powerful, suitable for electronic current and voltage mutual inductance based on G/T 20847.7 /8 The calibration of the analog output interface and digital output interface of the device is also suitable for the calibration of traditional current and voltage transformers;
●Based on the design of virtual instruments, the operation is simple, the configuration is flexible, and the system is stable;
●High accuracy and strong reliability. The accuracy level reaches 0.05 level and has S-level calibration function, which can be used to compare and verify 0.2S-level electronic current transformers and 0.2-level electronic voltage transformers.
●Using patented technology to specially design high-accuracy air-core coils to achieve online calibration of electronic transformers.
●The high-precision interpolation method is used for synchronization to ensure that the data collected by the calibrated transformer and the standard transformer are synchronized in strict timing, greatly improving the reliability and practicality.
Product functions
●Flexible configuration, traditional current transformer calibration/traditional voltage transformer calibration/electronic current transformer calibration/electronic type can be configured according to different needs Voltage transformer calibration;
●Calculate the ratio and angle difference between the current/voltage effective values ??of the calibrated transformer and the standard transformer;
●Display the current primary conductor current, Voltage, frequency and other related information facilitates comprehensive evaluation of the parameters being calibrated;
●Displays the real-time waveform output by the calibrated transformer, as well as related settings, and automatically saves the calibration data and generates reports;
●Flexibly configure test parameters, test range, test times, sampling points and other related information. Mace is afraid of harming Ban Xun