CN104267374A - Online detecting and state assessing system of metering device - Google Patents

Online detecting and state assessing system of metering device Download PDF

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Publication number
CN104267374A
CN104267374A CN201410557288.2A CN201410557288A CN104267374A CN 104267374 A CN104267374 A CN 104267374A CN 201410557288 A CN201410557288 A CN 201410557288A CN 104267374 A CN104267374 A CN 104267374A
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source
gateway meter
evaluating
data
meter
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CN104267374B (en
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张龙飞
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CHENGDU SIHAN TECHNOLOGY Co Ltd
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CHENGDU SIHAN TECHNOLOGY Co Ltd
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Abstract

The invention discloses an online detecting and state assessing system of a metering device. The online detecting and state assessing system comprises a master meter, a master meter assessing device, a data concentrator and a master station server. The data concentrator obtains internal collected electric quantity data of the master meter in a centralized mode and uploads the internal collected electric quantity data to the master station server; the master meter assessing device collects electric quantity data of a power grid master node in real time, reads the internal collected electric quantity data of the master meter, carries out the data statistics and comparison analysis, conducts online detection and state assessment on the master meter, and gives an alarm for the system abnormal situation; the master station server carries out remote monitoring and state assessing on the master meter. The system is low in cost, convenient to install, easy to operate and maintain, and capable of online detecting the voltage, the current, the power, the electric quantity and other data of the metering device, the real-time online error detecting and alarming, the secondary voltage drop testing, the secondary current and voltage load testing on the master meter are achieved, and an existing manual patrolling mode is replaced.

Description

Measuring apparatus on-line checkingi and status assessing system
Technical field
The present invention relates to a kind of measuring apparatus supervisory system, particularly a kind of on-line checkingi of measuring apparatus and status assessing system.
Background technology
Energy metering device be between country, between regional power grid, between provincial power network, between area power grid, electricity power enterprise's online, charging or the examination electrical energy metering equipment such as mega-corporation user, comprise gate energy meter, voltage transformer pt, Current Transmit and secondary circuit etc.In order to ensure the accuracy of measuring, the said equipment needs regularly to carry out detection check, the way generally adopted now is that artificial cycle carries specialized detection and patrols and examines to scene, the manpower dropped into and expense is large, testing amount is large, workflow very complicated, cycle are long, cannot grasp the running status of equipment in real time, also cannot carry out effective monitor and managment to numerous electric energy measuring equipments, the equipment alarm information that breaks down is difficult to be fed back in time.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency existing in prior art, a kind of measuring apparatus on-line checkingi and status assessing system are provided, this system is based on the CPU technology of a new generation, adopt large scale integrated circuit, Applied Digital sampling processing technology and SMT technique, and be furnished with the network management system of complete advanced person, it is low that system has cost, easy for installation, the features such as operation maintenance is simple, the voltage of energy on-line checkingi measuring apparatus, electric current, power, the data such as electricity, achieve the real-time online error-detecting to Source of Gateway Meter and alarm, voltage secondary voltage drop is tested, current/voltage secondary load is tested, instead of existing artificial inspection pattern.
In order to realize foregoing invention object, the invention provides following technical scheme:
The on-line checkingi of measuring apparatus and status assessing system, comprise Source of Gateway Meter, Source of Gateway Meter apparatus for evaluating, data concentrator and main website server; Described Source of Gateway Meter is connected with power network with Source of Gateway Meter apparatus for evaluating, and described Source of Gateway Meter is connected successively with data concentrator, main website server, and described Source of Gateway Meter apparatus for evaluating is connected with Source of Gateway Meter, main website server; The inside of described Source of Gateway Meter collection electric quantity data is concentrated and is obtained and be uploaded to main website server by described data concentrator; The electric quantity data of described Source of Gateway Meter apparatus for evaluating Real-time Collection power network critical point node the inside of reading described Source of Gateway Meter gathers electric quantity data, carry out data statistics and comparative analysis, on-line checkingi and state estimation are carried out to described Source of Gateway Meter, alarm is provided for abnormal conditions system, statistics and comparative analysis result are uploaded to main website server; Described main website server gathers the statistics of electric quantity data and described Source of Gateway Meter apparatus for evaluating according to the inside of the described Source of Gateway Meter obtained and comparative analysis result carries out remote monitoring and state estimation to described Source of Gateway Meter.
Preferably, the on-line checkingi of described measuring apparatus and status assessing system also comprise PT harvester, described PT harvester is connected with Source of Gateway Meter apparatus for evaluating with voltage transformer pt, described PT harvester gathers PT voltage data and returns to Source of Gateway Meter apparatus for evaluating, and Source of Gateway Meter apparatus for evaluating is monitored secondary circuit voltage drop according to the Source of Gateway Meter side voltage data of described PT voltage data and collection.
Preferably, the on-line checkingi of described measuring apparatus and status assessing system also comprise CT harvester, described CT harvester is connected with Source of Gateway Meter apparatus for evaluating with Current Transmit, and described Source of Gateway Meter apparatus for evaluating is monitored the PT load of secondary circuit, CT load according to the electric current and voltage data of described PT harvester and the collection of CT harvester.
Preferably, described Source of Gateway Meter apparatus for evaluating comprises analogue collection module, Source of Gateway Meter communication module, pulsed quantity acquisition module, switching value acquisition module, PT/CT communication module, main website communication module, clock module, field maintemance module, local memory module, LED display module.
Preferably, described clock module comprises real-time clock module and GPS module.
Preferably, described Source of Gateway Meter apparatus for evaluating carries out monitoring according to the Source of Gateway Meter side voltage data of described PT voltage data and collection to secondary circuit voltage drop and comprises, PT harvester measures the effective value of PT voltage by being wirelessly transmitted to Source of Gateway Meter apparatus for evaluating, contrast with the Source of Gateway Meter side voltage effective value of Source of Gateway Meter apparatus for evaluating collection, draw the amplitude error of PT secondary circuit voltage drop.
Preferably, described Source of Gateway Meter apparatus for evaluating carries out monitoring to secondary circuit voltage drop and comprises, by the GPS module of Source of Gateway Meter apparatus for evaluating, time synchronized is carried out to PT harvester and Source of Gateway Meter apparatus for evaluating, the phase measurement enabling signal simultaneously producing PT harvester and Source of Gateway Meter apparatus for evaluating realizes the synchro measure of phase place, to draw the phase error of PT secondary circuit voltage drop.
Preferably, the described GPS module by Source of Gateway Meter apparatus for evaluating is carried out time synchronized to PT harvester and Source of Gateway Meter apparatus for evaluating and is comprised, and described GPS module obtains the synchronous pps pulse per second signal of GPS as phase measurement enabling signal.
Preferably, the communication of described main website server and Source of Gateway Meter apparatus for evaluating adopts wired ethernet or wireless network.
Preferably, the communication of described Source of Gateway Meter communication module and described Source of Gateway Meter adopts RS485 bus, and described PT/CT communication module and PT harvester adopt Zigbee wireless telecommunications with communicating of CT harvester.
compared with prior art, beneficial effect of the present invention:
1. substitute existing artificial inspection pattern, cost of labor is low, easy for installation, operation maintenance is simple, can the data such as voltage, electric current, power, electricity of on-line checkingi measuring apparatus, realize the real-time online error-detecting of Source of Gateway Meter and alarm, the test of voltage secondary voltage drop, the test of current/voltage secondary load.
2. support to organize monitoring function, a Source of Gateway Meter apparatus for evaluating simultaneously to 12 measurement loop monitoring, can provide the functions such as the storage of abundant circuit monitoring, data, communication, man-machine interface, telemanagement more.
3. Source of Gateway Meter side adopts wireless communication mode to gather PT, CT side electric current and voltage data, and eliminate traditional long lead metering system, equipment is easy for installation.
4. system adds GPS module to carry out time synchronized at secondary circuit voltage drop part of detecting, thus ensures the phase error accurately measuring secondary circuit voltage drop, more accurate than traditional mode that generally only can detect secondary circuit voltage drop amplitude error.
5. the main website server of power network measurement centre supports long-range true-time operation Source of Gateway Meter apparatus for evaluating, integrate monitoring, warning, display, analytic statistics, communication, administration configuration function, system both can realize the Data Comparison in real-time sampling moment, also can do the analysis of statistical value in one section of event.
Accompanying drawing explanation
Fig. 1 is system architecture schematic diagram of the present invention
Fig. 2 is Source of Gateway Meter apparatus for evaluating structural representation of the present invention.
Embodiment
Below in conjunction with test example and embodiment, the present invention is described in further detail.But this should be interpreted as that the scope of the above-mentioned theme of the present invention is only limitted to following embodiment, all technology realized based on content of the present invention all belong to scope of the present invention.
As shown in Figure 1, the on-line checkingi of measuring apparatus and status assessing system comprise Source of Gateway Meter, Source of Gateway Meter apparatus for evaluating, data concentrator and main website server; Source of Gateway Meter is all connected with power network circuit with Source of Gateway Meter apparatus for evaluating, and Source of Gateway Meter is connected successively with data concentrator, main website server, and Source of Gateway Meter apparatus for evaluating is connected with Source of Gateway Meter, main website server; The inside of Source of Gateway Meter collection electric quantity data is concentrated and is obtained and be uploaded to main website server by data concentrator; Source of Gateway Meter apparatus for evaluating possesses high precision monitor circuit, the information about power data of Real-time Collection power network critical point node, support that the inside image data that various stipulations can read critical point ammeter carries out data statistics and comparative analysis simultaneously, on-line checkingi and state estimation are carried out to described Source of Gateway Meter, alarm is provided for abnormal conditions system, statistics and comparative analysis result is uploaded to main website server simultaneously; The main website server of power network measurement centre gathers the statistics of electric quantity data and described Source of Gateway Meter apparatus for evaluating according to the Source of Gateway Meter inside obtained and comparative analysis result carries out remote monitoring and state estimation to Source of Gateway Meter.
System needs can match when monitoring PT, CT installs PT harvester and CT harvester, does not need monitoring PT, CT then can install separately Source of Gateway Meter apparatus for evaluating.
PT harvester is installed in power network PT cabinet, be connected with Source of Gateway Meter apparatus for evaluating with voltage transformer pt (not shown), PT three-phase voltage is done high precision collecting by PT harvester on the spot, and by data back to Source of Gateway Meter apparatus for evaluating, the voltage of the collection point of Source of Gateway Meter side can also be done accurate measurement by Source of Gateway Meter apparatus for evaluating, and background system can monitor the situation of secondary circuit voltage drop according to the data between 2 measurement points.Test PT secondary circuit voltage drop, needs the voltage fetching two ends, road to contrast, obtains the number percent that pressure drop accounts for signal.Traditional way is, with long lead, PT side signal is guided to instrument side, by the amplitude error between pressure reducing instrument test PT side and two, instrument side signal and phase error.The present invention, in order to the convenience of installing, employs wireless mode.Measure the effective value of voltage in PT side by PT harvester, the ammeter side voltage effective value collected with it by the Source of Gateway Meter apparatus for evaluating being wirelessly transmitted to ammeter side is contrasted, and draws the amplitude error of PT secondary circuit voltage drop.Further, the present invention also carries out time synchronized by the GPS module of Source of Gateway Meter apparatus for evaluating to PT harvester and Source of Gateway Meter apparatus for evaluating, the phase measurement enabling signal simultaneously producing PT harvester and Source of Gateway Meter apparatus for evaluating realizes the synchro measure of phase place, to draw the phase error of PT secondary circuit voltage drop.Because phase test needs to be accurate to point, corresponding time delay is at about 1uS, therefore native system adds GPS module to carry out time synchronized (time service precision 1uS), obtain the synchronous pps pulse per second signal of GPS as phase measurement enabling signal by GPS module, thus ensure the phase error measuring secondary circuit voltage drop.
CT harvester is installed in power network CT cabinet, be connected with Source of Gateway Meter apparatus for evaluating with Current Transmit (not shown), the voltage of secondary circuit PT side and the current signal of this circuit is recorded by PT harvester, the electric current of CT side and the voltage signal of this circuit of secondary circuit is recorded by CT harvester, Source of Gateway Meter apparatus for evaluating obtains above-mentioned data obtain secondary circuit PT load, CT load by process, thus realizes the PT load of secondary circuit, the on-line monitoring of CT load.
As shown in Figure 2, Source of Gateway Meter apparatus for evaluating comprises analogue collection module, Source of Gateway Meter communication module, pulsed quantity acquisition module, switching value acquisition module, PT/CT communication module, main website communication module, clock module, field maintemance module, local memory module, LED display module.Monitoring function is organized in one table apparatus support more, and every table apparatus supports at most 12 measurement loop monitoring.Device inner every road pilot signal adopts three current transformer of linear characteristic and voltage dividers of three precision resistances being with compensation.Device adopts 32 Cotex-M3 kernels at a high speed, and performance reaches 70Mips, provides the functions such as the storage of abundant circuit monitoring, data, communication, man-machine interface, telemanagement.System possesses massive store, supports international IEC standard and the relevant ammeter communication protocol of state's net electric power: DL/T614, DL/T645 stipulations.
Analogue collection module is responsible for the ac analog collection in 12 loops, wherein every loop 3 voltage 3 electric current, and the mode of connection is 3P4L or 3P3L.Data processing obtains the parameters of electric power such as each loop voltage, electric current, active power, reactive power, applied power, active energy, reactive energy, frequency, phase angle.
Source of Gateway Meter communication module is responsible for the data acquisition of 12 pieces of Source of Gateway Meter, obtain the parameters of electric power such as voltage, electric current, active power, reactive power, applied power, active energy, reactive energy, frequency, phase angle of every block Source of Gateway Meter, obtain data by RS485 bus communication.
Pulsed quantity acquisition module, switching value acquisition module realize 12 road pulsed quantity or switch acquisitions, are mainly used in the measurement of electrical energy pulse, or the sampling of line switching signal.
PT/CT communication module realizes carrying out wireless networking with 12 CT equipment and 4 PT equipment, and realize Wireless Data Transmission, communication wireless telecommunications adopt Zigbee to realize.
Main website communication module realizes carrying out data interaction with main website, and main website carries out optimum configurations, status monitoring, sampled data and assessment raw data by this module to equipment and obtains.Communication modes is power communication wired ethernet mode or operator 2G, 3G, 4G wireless network.
Clock module realizes the operation of equipment clock time, the reservation of power down time, comprises real-time clock module and GPS module.The built-in 32.768KHz crystal unit of real-time clock module, has the functions such as moment, calendar, various measuring ability, interruption.GPS module is a complete satnav receiving equipment, and possess comprehensive function, positioning time, cold start-up was less than 27s, time service precision 1us, and output information comprises UTC time, longitude and latitude, pulse per second (PPS).
Field maintemance module and LED display module primary responsibility complete presence states instruction by the on-the-spot pilot lamp of LED, realize PC field maintemance operation, comprise parameters, read data etc. by serial ports.
Local memory module is mainly used in the preservation of device configuration parameter, the preservation of sampling correcting data, the preservation of history freezing data, and event occurs to preserve.
The main website server of power network measurement centre runs long-range background system software, the various data that acquisition Source of Gateway Meter and Source of Gateway Meter apparatus for evaluating are uploaded, the function managed Back ground Information is provided, relevant rudimentary information and the operation maintenance information of measuring apparatus can be reflected.Back ground Information comprises substation information, power plant or customer information, electric energy meter information, mutual inductor information, secondary loop information, line information, bus information, end message, transformer information etc.The operational factor collection of Source of Gateway Meter is stored, forms the historical record of the operation conditions of electric energy meter.System according to condition can go out field apparatus (electric energy meter, voltage transformer (VT), current transformer) machine account information, amr message (voltage, electric current, power, power factor (PF), phasing degree, electric energy meter event, maximum demand, freeze electricity, rate that electric energy meter date-time, cell voltage, electric energy meter have been arranged and period) by express statistic, and EXCEL form statistical form can be derived, and can printout form (printing ammeter graph of errors, PT secondary voltage drop curve, CT and secondary circuit alien frequencies mechanical admittance curves figure thereof).System provides various exception and overproof, overload alarm (can carry out alarm threshold setting), alarm comprises: electric energy meter decompression, defluidization, disconnected phase, the alarm of ammeter battery undervoltage, electric energy meter error are transfinited, secondary circuit voltage drop transfinites, secondary load abnormal, system self abnormal (PT/CT harvester is abnormal, and Source of Gateway Meter apparatus for evaluating is abnormal).And support to preserve, show and print every alarm content.Print What comprises the content and time of origin etc. of alert data.System carries out the function of sound, light prompting to the alarm produced, alarm graphics mode display (comprising Real time graph, data list, histogram, pie chart); Automatic spring prompting function is had to the new alarm produced.System support, by different alarm level, arranges the color of alarm display.System has the default value of an alarm level color, supports User Defined simultaneously.When system acceptance is to new alarm, according to different alarm levels, produce different sound, prompting user has new alarm to produce, and notes solving in time.System has default alarm sound, and support that User Defined is as Source of Gateway Meter running status exception or bad border abnormal parameters, can report to the police immediately, managerial personnel checked Source of Gateway Meter in the very first time simultaneously.
Main website server also supports long-range true-time operation Source of Gateway Meter apparatus for evaluating, integrate monitoring, warning, display, analytic statistics, communication, administration configuration function, system both can realize the Data Comparison in real-time sampling moment, also can do the analysis of statistical value in one section of event.
Measuring apparatus on-line monitoring of the present invention and status assessing system be patrol and examine for gate energy meter, system that the problem such as detection is researched and developed, thus solve manual inspection, testing amount is large, the problems such as workflow is loaded down with trivial details, complicated.System is based on the CPU technology of a new generation, adopt large scale integrated circuit, Applied Digital sampling processing technology and SMT technique, and be furnished with the network management system of complete advanced person, the gate energy meter supervisory system with the complete set of modern advanced level manufactured designed by user's request.

Claims (10)

1. the on-line checkingi of measuring apparatus and status assessing system, is characterized in that, comprise Source of Gateway Meter, Source of Gateway Meter apparatus for evaluating, data concentrator and main website server; Described Source of Gateway Meter is connected with power network with Source of Gateway Meter apparatus for evaluating, and described Source of Gateway Meter is connected successively with data concentrator, main website server, and described Source of Gateway Meter apparatus for evaluating is connected with Source of Gateway Meter, main website server; The inside of described Source of Gateway Meter collection electric quantity data is concentrated and is obtained and be uploaded to main website server by described data concentrator; The electric quantity data of described Source of Gateway Meter apparatus for evaluating Real-time Collection power network critical point node the inside of reading described Source of Gateway Meter gathers electric quantity data, carry out data statistics and comparative analysis, on-line checkingi and state estimation are carried out to described Source of Gateway Meter, alarm is provided for abnormal conditions system, statistics and comparative analysis result are uploaded to main website server; Described main website server gathers the statistics of electric quantity data and described Source of Gateway Meter apparatus for evaluating according to the inside of the described Source of Gateway Meter obtained and comparative analysis result carries out remote monitoring and state estimation to described Source of Gateway Meter.
2. the on-line checkingi of measuring apparatus according to claim 1 and status assessing system, it is characterized in that, also comprise PT harvester, described PT harvester is connected with Source of Gateway Meter apparatus for evaluating with voltage transformer pt, described PT harvester gathers PT voltage data and returns to Source of Gateway Meter apparatus for evaluating, and Source of Gateway Meter apparatus for evaluating is monitored secondary circuit voltage drop according to the Source of Gateway Meter side voltage data of described PT voltage data and collection.
3. the on-line checkingi of measuring apparatus according to claim 2 and status assessing system, it is characterized in that, also comprise CT harvester, described CT harvester is connected with Source of Gateway Meter apparatus for evaluating with Current Transmit, and described Source of Gateway Meter apparatus for evaluating is monitored the PT load of secondary circuit, CT load according to the electric current and voltage data of described PT harvester and the collection of CT harvester.
4. according to on-line checkingi and the status assessing system of the arbitrary described measuring apparatus of claim 1-3, it is characterized in that, described Source of Gateway Meter apparatus for evaluating comprises analogue collection module, Source of Gateway Meter communication module, pulsed quantity acquisition module, switching value acquisition module, PT/CT communication module, main website communication module, clock module, field maintemance module, local memory module, LED display module.
5. the on-line checkingi of measuring apparatus according to claim 4 and status assessing system, it is characterized in that, described clock module comprises real-time clock module and GPS module.
6. the on-line checkingi of measuring apparatus according to claim 2 and status assessing system, it is characterized in that, described Source of Gateway Meter apparatus for evaluating carries out monitoring according to the Source of Gateway Meter side voltage data of described PT voltage data and collection to secondary circuit voltage drop and comprises, PT harvester measures the effective value of PT voltage by being wirelessly transmitted to Source of Gateway Meter apparatus for evaluating, contrast with the Source of Gateway Meter side voltage effective value of Source of Gateway Meter apparatus for evaluating collection, draw the amplitude error of PT secondary circuit voltage drop.
7. the on-line checkingi of measuring apparatus according to claim 4 and status assessing system, it is characterized in that, described Source of Gateway Meter apparatus for evaluating carries out monitoring to secondary circuit voltage drop and comprises, by the GPS module of Source of Gateway Meter apparatus for evaluating, time synchronized is carried out to PT harvester and Source of Gateway Meter apparatus for evaluating, the phase measurement enabling signal simultaneously producing PT harvester and Source of Gateway Meter apparatus for evaluating realizes the synchro measure of phase place, to draw the phase error of PT secondary circuit voltage drop.
8. the on-line checkingi of measuring apparatus according to claim 7 and status assessing system, it is characterized in that, the described GPS module by Source of Gateway Meter apparatus for evaluating is carried out time synchronized to PT harvester and Source of Gateway Meter apparatus for evaluating and is comprised, and described GPS module obtains the synchronous pps pulse per second signal of GPS as phase measurement enabling signal.
9. the on-line checkingi of measuring apparatus according to claim 3 and status assessing system, it is characterized in that, the communication of described main website server and Source of Gateway Meter apparatus for evaluating adopts wired ethernet or wireless network.
10. the on-line checkingi of measuring apparatus according to claim 3 and status assessing system, it is characterized in that, the communication of described Source of Gateway Meter communication module and described Source of Gateway Meter adopts RS485 bus, and described PT/CT communication module and PT harvester adopt Zigbee wireless telecommunications with communicating of CT harvester.
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