The invention discloses a detection method and device. The method comprises the steps that three-phase electric quantity signals are received, wherein the three-phase electric quantity signals include three-phase voltage signals and three-phase current signals; a standard message signal and a detected message signal are acquired, wherein the standard message signal is a message signal outputted by a standard merging unit according to the received three-phase electric quantity signals, the detected message signal is the message signal outputted by equipment to be detected according to the received three-phase electric quantity signals, and the equipment to be detected is equipment in digitalized electric energy metering equipment; and the standard message signal and the detected message signal are compared so that a detection result is obtained. With application of the detection method, problems of low equipment detection efficiency in the digitalized electric energy metering equipment in the related technologies can be solved.

Detection method and device

The invention discloses a watt-hour meter state assessment index selection and quantization method. According to the working principle and operation features of the watt-hour meter, an electric energy metering device online monitoring system such as a power utilization information acquisition system newly promoted by the national grid is combined, assessment indexes are extracted from three aspects of basic information, operation monitoring and operation state information, index selection is wide and complete, classification is distinct, and the operation state of the electric energy metering device can be comprehensively reflected. In addition, influences on the watt-hour meter by each index are researched, technical specification documents related to electric energy metering and management by the national grid are consulted, a corresponding index quantization standard is determined, and quantitative state assessment on the watt-hour meter is facilitated.

Watt-hour meter state assessment index selection and quantization method

The invention provides a piece of digital electric energy metering device calibration equipment and a method thereof. The equipment comprises a voltage regulator 1, a phase-shifted power supply 2, a voltage regulator 3, a booster 4, a large current generator 5, an error calculator 9, a piece of clock synchronization equipment 14, a standard electric energy metering module and a digital electric energy metering module. The error calculator 9 is connected with the standard electric energy metering module and the digital electric energy metering module. According to the invention, the comprehensive error of a substation digital electric energy metering device is measured by an overall check mode, and overall tracing of the digital electric energy metering device is realized. By adopting the equipment and the method of the invention, an intelligent substation digital electric energy metering device composed of an electronic transformer, a merging unit and a digital electric meter can be calibrated, and the calibration quantity value can be traced back to the highest grade of national electric energy standards.

Digital electric energy metering device calibration equipment and method thereof

The invention relates to a nuclear power station simulation instrument control system DCS transformation closed-loop verification system and method. The system comprises a simulation server, an operation display terminal and a virtual DCS server which are connected through network communication. The operation display terminal receives the initial condition and verification operation information inputted by the user and transmits the initial condition and verification operation information to the simulation server and displays the simulation result of the simulation server and the DCS verification simulation result of the virtual DCS server. The simulation server simulates the nuclear power station system equipment state and physical parameters according to the initial condition and based on the full scope simulator process system simulation model and outputs the simulation data. The virtual DCS server receives and processes the simulation data and then returns a DCS operation instruction to the simulation server and outputs the DCS simulation result to the operation display terminal to be displayed. Nuclear power station simulation instrument control system DCS transformation closed-loop test verification can be realized so that the major potential problems of digital transformation can be discovered in advance, controllable upgrade implementation risk and controllable construction period can be realized and the requirements of safe and stable operation of the unit can be met.

Nuclear power station simulation instrument control system DCS transformation closed-loop verification system and method

The invention discloses a digital electric energy measurement performance detection and tracing method and a closed-loop system An A/D converter is implanted in a digital standard electric energy meter, the digital standard electric energy meter becomes a digital and analog measurement device, and a D/A converter is implanted in a virtual power standard source, and the virtual power standard source becomes a digital and analog measurement device Digital measurement performance detection and upward tracing are carried out on the digital electric energy meter A complete and closed-loop measurement and tracing system is provided for digital electric energy measurement, a measurement criterion followed during a detection (standard transfer) measurement process and a standard tracing measurement process are explained, and blankness in the technical field of digital electric energy measurement is filled

Digital electric energy measurement performance detection and tracing method and closed-loop system

The invention provides an accuracy evaluation system for a digital electric energy meter. The system comprises an analogue standard source, an analogue standard electric energy meter, a digital electric energy meter calibrator and a control computer, wherein the control computer is connected with the analogue standard source and the digital electric energy meter calibrator, the analogue standard source is connected with the digital electric energy meter through the digital electric energy meter calibrator, and connected with the analogue standard meter simultaneously; the voltage range output by the analogue standard source is 0-480V, and the current range is 0-100A. The invention provides an accuracy evaluation system for a digital electric energy meter, which solves the problem that the present electric energy meter test device is incapable of testing or accurately testing the reliability and working stability of data reception of the digital electric energy meter.

Accuracy evaluation system for digital electric energy meter

The utility model provides a calibration device of a digital electric energy metering device. The calibration device includes a voltage regulator (1), a phase-shift power supply (2), a voltage regulator (3), a booster (4), a current boosting device (5), an error calculator (8), a clock synchronization device (14), a standard electric energy metering module and a digital electric energy metering module. The standard electric energy metering module includes a standard current transformer (6), a standard voltage transformer (7) and a standard electric energy meter (8). The digital electric energy metering module includes an electronic current transformer (10), an electronic voltage transformer (11), a merging unit (12) and a digital electric energy meter (13). The error calculator (9) is connected with the standard electric energy metering module and the digital electric energy metering module. The merging unit (12) is connected with the clock synchronization device (14). The calibration device adopts an integral calibration method to measure a comprehensive error of a substation digital electric energy metering device, and realizes the overall traceability of the digital electric energy metering device.

Calibration device of digital electric energy metering device

The invention relates to a digital electric energy meter IEC61850 conformance testing method and a system. The method comprises ICD model file static checking and MMS model dynamic detection of a digital electric energy meter. The system comprises a digital electric energy meter tester, a conformance testing controller, a network switch and an optical switch, wherein the digital electric energy meter tester, the optical switch, the tested digital electric energy meter, the network switch and the conformance test controller are sequentially connected; and the conformance test controller comprises a man-machine interaction module, a clock module, a tester control module, a testing case storage module, a result analysis module and an MMS reception module. The technical scheme provided by the invention realizes a test for the digital electric energy meter IEC61850 protocol conformance, so that mutual connection of intelligent transformer station digitalization metering equipment of different manufacturers is ensured; and the technical scheme can be applied to laboratory assessment for the protocol conformance of digitalization metering equipment such as the digital electric energy meter and the like.

Digital electric energy meter IEC61850 conformance testing method and system

The utility model relates to a digital electric energy meter IEC 61850 conformance testing system comprising a digital electric energy meter tester, a conformance testing controller, a network exchanger and a light exchanger; the digital electric energy meter tester, the light exchanger, a tested digital electric energy meter, the network exchanger and the conformance testing controller are connected in sequence; the conformance testing controller comprises a man-machine exchange module, a clock module, a tester control module, a testing case storage module, a result analyze module and a MMS reception module. The digital electric energy meter IEC 61850 protocol conformance test can be realized, so intelligent transformer station digitlization metering equipment of different manufacturers can be mutually connected; the testing system can be used for digitlization metering equipment protocol conformance laboratory assessment like the digitlization electric energy meter.

Xu Yinghui

Papers

Accuracy evaluation system for digital electric energy meter

Digital electric energy metering device calibration equipment and method thereof

Calibration device of digital electric energy metering device

Digital electric energy meter IEC61850 conformance testing method and system

Digital electric energy meter IEC 61850 conformance testing system