CN201828659U

CN201828659U - Inspection device of digitalized electric energy meter

Info

Publication number: CN201828659U
Application number: CN201020223227XU
Authority: CN
Inventors: 殷昌华; 杨晓科; 肖志华; 刘树新; 胡绍刚; 王世辉; 董晓刚; 孙丽娜; 王智海; 葛秀玲; 蒋晓刚; 刘君
Original assignee: State Grid Liaoning Electric Power Co Ltd; Wasion Group Co Ltd
Current assignee: State Grid Liaoning Electric Power Co Ltd; Wasion Group Co Ltd
Priority date: 2010-06-11
Filing date: 2010-06-11
Publication date: 2011-05-11
Anticipated expiration: 2020-06-11

Abstract

The utility model discloses a digital electric energy meter inspection device, which includes a signal source, a standard meter, a pulse acquisition circuit, an error processor, a router, and an optical fiber conversion module. The signal source is a digital signal source, which includes a signal source logic module and signal source data processing module; the standard meter is a digital standard meter, which includes a standard meter logic module and a standard meter data processing module for receiving digital signals and providing standard high-frequency power pulses; the signal source logic module, The standard table logic module and the error processor are connected by RS485 bus; the router is connected with the signal source and distributes the output data frame to the standard table processing module and the optical fiber conversion module; the optical fiber conversion module converts the digital electrical signal into an analog optical signal and sends it to the measured The meter; the pulse acquisition circuit is connected with the error processor, and the collected standard high-frequency pulse and the measured meter pulse are sent to the error processor for comparison and processing. The utility model can be used for testing digital electric energy meters conforming to various protocol standards.

Description

The digitalized electrical energy meter verifying attachment

Technical field

The utility model relates to a kind of device that is used to detect the digital transformer substation electric energy meter.

Background technology

Digitalized electrical energy meter is meant follows IEC61850-9-1, IEC61850-9-2 communication of digitalization transformer substation stipulations and IEC60044-7/8 electronic mutual inductor standard, has the digital signal input interface, is applied to the electric energy meter of digital transformer substation.Because the input port of digitalized electrical energy meter is a digital interface, and traditional simulation calibration equipment can not provide the digit check signal, and the checking signal of simulation can only be provided, as shown in Figure 2, therefore can't be used for the verification of digitalized electrical energy meter.

The IEC61850 standard is based on the international standard of the electric substation automation system of universal network communication platform, and this standard is divided into 3 layers with the transformer substation communication system: substation level, wall and process layer.Network using Abstract Common Service Interface between substation level and wall is mapped to makes message specification, TCP Ethernet or optical networking.Network using single-point between wall and process layer is to the one-way transmission Ethernet of multiple spot.Intelligent electronic device in the transformer station all adopts unified agreement, carries out message exchange by network.

The IEC60044-7/8 standard is the international standard of electronic mutual inductor, has defined the frame format that is transferred to the Frame of merge cells by electronic mutual inductor in this standard, stipulates for the mapping position of every sampled value therein.

Traditional calibrator for watt-hour meter mainly is made up of simulation signal generator generating means, standard scale and error processor, its signal source is to obtain sinusoidal digital quantity by MCU according to the calculation of parameter of setting to be input to 6 road D/A converters, obtain 6 tunnel sine waves that have certain phase relation between mutually respectively, input to power amplifier as the signal of three-phase voltage and three-phase current and obtain UA, UB, UC, IA, IB and IC output.The simulating signal that tested table and standard scale received signal source produce is exported tested table pulse and high-frequency impulse respectively and is given error processor, thereby obtains error amount.

The utility model content

The purpose of this utility model is to provide a kind of verifying attachment that is used for the digitalized electrical energy meter verification, makes the digitalized electrical energy meter of following IEC61850-9-1, IEC61850-9-2 and IEC60044-7/8 consensus standard can access check.

This digitalized electrical energy meter verifying attachment that the utility model provides, comprise signal source, standard scale, pulse acquisition circuit, error processor, also comprise router, fiber optic switching module, described signal source is a derived digital signal, and it comprises signal source logic module and signal source data processing module; Described standard scale is digital standard scale, and it comprises that standard scale logic module and standard scale data processing module are used for receiving digital signals and the pulse of standard high frequency power is provided; Described signal source logic module, standard scale logic module and error processor connect with the RS485 bus; The Frame that router is connected with signal source its output is distributed to standard scale processing module and fiber optic switching module; Fiber optic switching module converts digital electric signal to analog optical signal and delivers to tested table; Pulse acquisition circuit is connected with error processor, error processor is delivered in the standard high-frequency impulse gathered and tested table pulse compared processing.

What described signal source data processing module and standard scale data processing module all adopted is the digital signal processor with network interface and asynchronous serial communication mouth.

The digit check signal of the utility model verifying attachment output is followed the consensus standard of IEC61850-9-1, IEC61850-9-2 and IEC60044-7/8, the concrete form of Frame can be according to the requirement configuration that realizes, and the voltage of output digital signal representative, the amplitude of current signal and phase place can require to be provided with and to revise according to reality, therefore can be used for the check character digitalized electrical energy meter of the various implementations of stating consensus standard that closes.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the prior art constructions synoptic diagram.

Embodiment

As shown in Figure 1, the utility model digital watch calibration equipment is made up of derived digital signal, digital standard scale, router, pulse acquisition circuit, error processor and power module.Signal source is made up of logic function module and data processing module, and wherein the logic function module is made up of 16 single-chip microcomputers and peripheral interface circuit, is responsible for the parameter setting and the management function of signal source; The data processing module of signal source mainly is made up of 16 DSP and network interface chip, and DSP is responsible for data sampling and framing, and by network port output data frame.Digital standard scale is similar with signal source on hardware configuration, mainly realizes different functions by software control.Router, photoelectric conversion module and error processor can be bought from market and obtain, and Fig. 1 is seen in the connection between each module.

Derived digital signal has two kinds of mode of operations, a kind of online mode, and a kind of is offline mode.When being operated in online mode, PC comes control figure signal source, digital standard scale and error processor as main control equipment by the RS485 bus; When being operated in offline mode, the logical block of signal source is come parameter and the control criterion table and the error processor in signalization source as main control equipment.Derived digital signal is according to the signal of set parametric configuration analog electrical network operation situation, according to the sampling rate of setting this signal sampling is quantized, data after the quantification generate the Frame that meets IEC61850-9-1, IEC61850-9-2 or IEC60044-7/8 standard according to parameter request, flow to tested table and digital standard scale by the network port.

The Frame that meets the variety of protocol standard of digital standard scale receiving digital signals source output, the resolution data frame obtains sampled data wherein, carries out electric energy metrical, obtains current performance number, and exports corresponding high-frequency impulse according to the performance number that calculates.

Router is used to receive and transmit the Frame of derived digital signal output, can produce multiple signals to a way word signal branch, uses for a plurality of tested tables simultaneously.Pulse acquisition circuit is used to gather the output pulses of tested table output and be transferred to error processor.

Error processor receives the high-frequency impulse of digital standard scale output and the tested apparent power pulse that pulse acquisition circuit collects, and relatively the two-way input pulse calculates and the display error value.

Power module provides stable working power for each functional module in installing, because the module that relates in the device is numerous, and each module operating voltage is inconsistent, therefore needs power module that various voltage level steady operation power supplys are provided.

According to the different and employed agreement different (IEC61850 agreement or IEC60044 agreements) of the DSP function of derived digital signal and digital standard scale, selected device is difference to some extent.If what use is the IEC60044 agreement, adopt the reception and the transmission of FPGA realization signal, if use is the IEC61850 agreement, adopt the reception and the transmission of the network chip realization signal of light mouth or electricity mouthful (because of the difference difference of tested table signaling interface).

Claims

1. digitalized electrical energy meter verifying attachment, comprise signal source, standard scale, pulse acquisition circuit, error processor, it is characterized in that also comprising router, fiber optic switching module, described signal source is a derived digital signal, and it comprises signal source logic module and signal source data processing module; Described standard scale is digital standard scale, and it comprises standard scale logic module and standard scale data processing module; Described signal source logic module, standard scale logic module and error processor connect with the RS485 bus; The Frame that router is connected with signal source its output is distributed to standard scale processing module and fiber optic switching module; Fiber optic switching module converts digital electric signal to analog optical signal and delivers to tested table; Pulse acquisition circuit is connected with error processor, error processor is delivered in the standard scale high-frequency impulse gathered and tested table pulse compared processing.

2. according to the described digitalized electrical energy meter verifying attachment of claim 1, what it is characterized in that signal source data processing module and standard scale data processing module all adopt is the digital signal processor with network interface and asynchronous serial communication mouth.