CN103913719A - Method for judging mistaken powering-down fault causes of single-phase carrier intelligent electric meter - Google Patents
Method for judging mistaken powering-down fault causes of single-phase carrier intelligent electric meter Download PDFInfo
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- CN103913719A CN103913719A CN201410157463.9A CN201410157463A CN103913719A CN 103913719 A CN103913719 A CN 103913719A CN 201410157463 A CN201410157463 A CN 201410157463A CN 103913719 A CN103913719 A CN 103913719A
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Abstract
The invention discloses a method for judging mistaken powering-down fault causes of a single-phase carrier intelligent electric meter. The mistaken powering-down fault causes are judged by detecting the secondary side voltage of a transformer in the meter, the load capacity of the electric meter and dynamic power consumption of a carrier communication module. The method is implemented through a device for judging the mistaken powering-down fault causes of the single-phase carrier intelligent electric meter, and the device is composed of a three-phase standard source, a meter reading controller, a contactor, a control unit, a conditioning circuit, a load box, a PC, a direct-current power source analysis meter and a site working condition simulation unit. According to the method, analysis of mistaken powering-down faults of the single-phase carrier intelligent electric meter is achieved by means of a DSP, specific causes, for example, damage of the transformer, the insufficient load capability of the electric meter and overhigh dynamic power consumption of the carrier communication module, for mistaken powering-down faults can be analyzed accurately, and analysis and troubleshooting of the faults are facilitated. According to the method, a site communication environment can be simulated, and the dynamic power consumption of the carrier communication module in the single-phase carrier intelligent electric meter is detected and analyzed under actual site working conditions.
Description
technical field
The present invention relates to a kind of method that judges single-phase carrier intelligent electric meter mistake power down failure cause, belong to Electric Energy Metering Technology field.
background technology
Power line carrier communication has become a kind of usual way that completes concentrator and electric energy meter communication, and the single-phase carrier intelligent electric meter with carrier communication function is also widely used in intelligent grid.The standard Q/GDW1364-2013 of Guo Wang incorporated business " single-phase intelligent electric energy meter technical manual " regulation: when the voltage terminal voltage of electric energy meter lower than its reference voltage 60% time, ammeter is answered power down and is recorded power loss event.But find at the scene: in the time that the voltage terminal voltage of part ammeter is its reference voltage, power down still occurs ammeter, and this phenomenon of the failure not only causes the increase of platform district line loss to bring huge economic loss to electric company, also can cause the generation of metering dispute.
The power down of bug list judges that sampled voltage is taken at the direct supply voltage place of electric energy meter supply carrier module.Therefore transformer damages, the factor such as excessive, the electric energy meter load capacity deficiency of carrier module power consumption all can drag down this place's voltage.In the time that voltage is pulled down to below the power down threshold values of setting, CPU judges ammeter power down, corresponding interrupt routine in trigger table, and the generation of power loss event and end time also have power loss event total degree to be recorded and to be stored in CPU.For the fault of single-phase carrier intelligent electric meter mistake power down, also do not have concrete method and apparatus to judge failure cause at present.
Summary of the invention
The object of the invention is to have overcome the deficiencies in the prior art, a kind of method that judges single-phase carrier intelligent electric meter mistake power down failure cause is provided, for the concrete reason of discriminatory analysis single-phase carrier electric energy meter mistake power down fault, be convenient to investigate in time fault.
In order to solve the problems of the technologies described above, the present invention is achieved through the following technical solutions:
The present invention judges that by detecting the load capacity of the alternating voltage of Circuit Fault on Secondary Transformer in tested table, tested table and the dynamic power consumption analysis of tested table intercarrier communication module the reason of mistake power down fault occurs tested table, and energy simulated field communication environment, detect the dynamic power consumption of analyzing single-phase carrier intelligent ammeter intercarrier communication module under on-the-spot actual condition; The inventive method is to realize by a kind of device that judges single-phase carrier intelligent electric meter mistake power down failure cause.
The transformer of supplying with carrier communication module power in table is damaged, and can cause the secondary side voltage of transformer lower than normal value, and the magnitude of voltage after rectifier bridge is accordingly lower than normal value, and mistake power down fault occurs ammeter.Can judge this type of failure cause of investigation by detecting the alternating voltage of this Circuit Fault on Secondary Transformer in tested table.
When electric energy meter and concentrator generation carrier communication, due to the load capacity deficiency of tested table, the dynamic power consumption of carrier communication module normal consumption can be pulled down to its DC power supply voltage below power down threshold values, and mistake power down fault occurs ammeter.Can judge this type of failure cause of investigation by detecting the load capacity of electric energy meter.
Ammeter and concentrator are in the time carrying out carrier communication, and the dynamic power consumption of carrier communication module is crossed conference its DC power supply voltage is pulled down to below power down threshold values, and mistake power down occurs ammeter.Can investigate this type of failure cause by the dynamic power consumption that detects tested table intercarrier communication module.
The present invention also provides a kind of device that judges single-phase carrier intelligent electric meter mistake power down failure cause:
This device by three-phase standard source, copy control device, contactor, control module, modulate circuit, load box, PC, direct supply analyser and field working conditions analogue unit and form.
Copy control device and carry out carrier communication according to parameter and the single-phase carrier wave meter set, thereby complete the collection to related data in ammeter.
Control module is mainly made up of DSP and AD module.The TMSF2812 chip that DSP adopts, carries out AD conversion by the each interchange collecting, DC voltage value by AD modular converter, and DSP carries out Treatment Analysis by the data after conversion again, realizes fault analysis and judgement.The magnitude of voltage allowing due to AD conversion module input end is less, therefore can realize the adjustment to input voltage by modulate circuit, and then be met the input voltage of requirement.DSP to Data Management Analysis after, by controlling the achieve a butt joint control of the closed and off state of tentaculum of GPIO pin output low and high level.
The pure resistive resistance that load box is 96 Ω (precision is ± 5%) by several resistances forms, for detection of the load capacity of electric energy meter.
Field working conditions analogue unit comprises: input port, output port, signal attenuator, line of electric force capacitive load simulator, line of electric force inductive load simulator and contactless contactor (K1 and K2).
Signal attenuator, line of electric force capacitive load simulator and the parallel connection of line of electric force inductive load simulator are connected between input interface and output interface by contactless contactor K1 and K2.A pair of contactor KM1 and KM2 are for whether access carrier module DC power output end of controlling resistance case in addition.
Three-phase standard source connects respectively a winding copying transformer in control device and tested ammeter; Control module connects two road modulate circuits; Wherein two of a road input ports are connected in parallel on the transformer secondary winding in tested ammeter; Two, another road input port is connected in the output terminal of tested ammeter rectifier bridge in parallel; Load box is connected the output terminal of tested ammeter rectifier bridge with KM2 by contactor KM1;
PC is connected with direct supply analyser data communication port by USB interface, controls direct supply analyser and reads and record power consumption data; Direct supply analyser ripple communication module is connected, and provides direct supply to it.Ammeter is connected with carrier communication module by light current interface and realizes the exchanges data between the two; Field working conditions analogue unit respectively with carrier communication module with copy control device be connected; Copy control device and be connected with PC by RS232 interface, copy control device by PC control, the interior related data of the required ammeter reading and the time interval of reading when test is set.
Compared with prior art, the invention has the beneficial effects as follows: the present invention utilizes DSP to realize the mistake power down fault analysis of single-phase carrier intelligent electric energy meter, can accurate analysis cause the concrete reason of such fault, as transformer damages, ammeter load capacity deficiency and communication module dynamic power consumption excessive, be convenient to analysis and the investigation of fault.The present invention can also simulated field communication environment, detects the dynamic power consumption of analyzing single-phase carrier intelligent ammeter intercarrier communication module under on-the-spot actual condition.
Brief description of the drawings
Fig. 1 is apparatus structure schematic diagram of the present invention; Fig. 2 is field working conditions analogue unit schematic diagram of the present invention;
Fig. 3 is fault judgment method process flow diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail:
Shown in Fig. 1, be apparatus structure schematic diagram of the present invention, while being detection shown in dotted line is interior, with the related tested ammeter structure division of this device, dotted line is depicted as the body construction of device outward.
Three-phase standard source provides single-phase carrier intelligent meter (copying control device) required single-phase (three-phase) standard reference alternating voltage, this alternating voltage is converted into less secondary side alternating voltage by the transformer in ammeter, obtain by rectifier bridge the DC voltage that amplitude is 12V, the carrier module that this DC voltage is ammeter provides direct current output, and the power loss event of ammeter adopts voltage to be taken at herein.By 7805 stabilivolt voltage stabilizings, the value of obtaining is about the DC voltage of 5.7V, and this voltage becomes by the step-down of diode the direct current that numerical value is 5V, for other funtion part of ammeter provides direct supply.
Take off the carrier module of ammeter, secondary side at transformer is measured ac voltage, by the analyzing and processing of DSP, if this end ac voltage (offers voltage and the desirable no-load voltage ratio of transformer of transformer primary side in ammeter lower than setting initial value according to three-phase standard source, set this numerical value and leave certain nargin), the mistake power down fault that can judge this ammeter is to be damaged and caused by transformer in table.
If DSP has judged that the transformer function in ammeter is normal, the load capacity of ammeter is tested.Contactor KM1 and KM2 are in closed original state, now at the direct supply place of carrier module, being equivalent to access a resistance is the pure resistive resistance of 96 Ω (precision ± 5%), by the analyzing and processing of DSP, if this DC voltage value is not within the scope of (12 ± 1) V, the mistake power down fault of judging this ammeter is to be caused by ammeter load capacity deficiency.
If DSP has judged the load capacity of ammeter and has met the demands, on tested ammeter, carrier communication module is installed, data type and acquisition time interval in the tested electric energy meter that needs to gather is set by PC, then according to the parameter of setting, copies control device and start to carry out carrier communication with tested ammeter.Now contactor KM1 and KM2 switch to off-state by closure, DSP carries out analyzing and processing to the direct supply voltage of carrier module, if this DC voltage is lower than 11V, judge that the mistake power down fault of this ammeter, by excessive the causing of dynamic power consumption of carrier communication module, now measures the dynamic power consumption under different operating modes of carrier communication module.
By the connection of USB port, PC can be controlled direct supply analyser parameters, and the data of ammeter, by carrier module, through field working conditions analogue unit, receive and return to PC by RS485 data by copying control device.Change the type of field working conditions analogue unit, corresponding carrier module power can change, and then obtain the actual dynamic power consumption of carrier communication module under this operating mode, this power consumption data can directly read from direct supply analyser panel, also can be read by PC data the storage of direct supply analyser, be convenient to the data analysis to collecting.
Fig. 2 is the schematic diagram of field working conditions analogue unit of the present invention.Field working conditions analogue unit comprises: contactless contactor K1 and K2, carrier wave attenuator, line of electric force capacitive load simulator, line of electric force inductive load simulator.
Carrier wave attenuator, line of electric force capacitive load simulator and the parallel connection of line of electric force inductive load simulator are connected between input interface and output interface by switch.Contactless contactor K1 and K2 are used for selecting the field working conditions of required simulation.Line of electric force capacitive load simulator is used for simulating the field working conditions in the time that the load of actual power line equivalent electrical circuit is capacitive; Line of electric force inductive load simulator is used for simulating the field working conditions in the time that the load of actual power line equivalent electrical circuit is perception; The attenuation coefficient of signal attenuator should be adjustable, be used for analog carrier signal through in various degree decay after field working conditions.
Shown in Fig. 3, be fault judgment method process flow diagram of the present invention, its concrete steps are as follows:
Step 1: three-phase standard source boosts, provides the reference voltage of standard to copying control device and tested single-phase carrier intelligent meter;
Step 2: detect the Circuit Fault on Secondary Transformer voltage in voltage sample loop in ammeter, damage and cause by transformer in ammeter if this magnitude of voltage lower than initial set value, is judged mistake power down fault;
Step 3: if the magnitude of voltage in step 2 higher than initial set value, contactor KM1 and KM2 closure;
Step 4: the direct supply voltage that utilizes direct supply analyser to offer carrier module to electric energy meter detects, if this magnitude of voltage not within the scope of (12 ± 1) V, judges that mistake power down fault is caused by ammeter load capacity deficiency;
Step 5: if magnitude of voltage is within the scope of (12 ± 1) V in step 4, contactor KM1 and KM2 disconnect;
Step 6: copy control device and carry out carrier communication according to parameter and the electric energy meter set;
Step 7: the direct supply voltage that electric energy meter is offered to carrier module detects, if this magnitude of voltage lower than 11V, judges that mistake power down fault causes by carrier communication module dynamic power consumption is excessive;
Step 8: enter detected carrier communication module dynamic power consumption process of measurement, measure under Different field operating mode, the dynamic power consumption of carrier communication module, records and save data by PC;
Step 9: in step 7, if the magnitude of voltage recording is not less than 11V, three-phase voltage source step-down, test finishes.
By a kind of method that judges single-phase carrier intelligent electric meter mistake power down failure cause of the present invention, can carry out the concrete analysis of causes and judgement for the mistake power down fault of single-phase carrier intelligent electric energy meter, and carrier communication module dynamic power consumption is detected.Not only ensure the operation accurately and reliably of electric energy meter, also avoided the metering dispute between electric company and electricity consumption client.
Claims (3)
1. one kind judges the method for single-phase carrier intelligent electric meter mistake power down failure cause, it is characterized in that, described method judges that by detecting the load capacity of the alternating voltage of Circuit Fault on Secondary Transformer in tested table, tested table and the dynamic power consumption analysis of tested table intercarrier communication module the reason of mistake power down fault occurs tested table, and energy simulated field communication environment, detect the dynamic power consumption of analyzing single-phase carrier intelligent ammeter intercarrier communication module under on-the-spot actual condition; Described method is to realize by a kind of device that judges single-phase carrier intelligent electric meter mistake power down failure cause.
2. a kind of method that judges single-phase carrier intelligent electric meter mistake power down failure cause according to claim 1, it is characterized in that, described device by three-phase standard source, copy control device, contactor, control module, modulate circuit, load box, PC, direct supply analyser and field working conditions analogue unit and form; Three-phase standard source connects respectively a winding copying transformer in control device and tested ammeter; Control module connects two road modulate circuits; Wherein two of a road input ports are connected in parallel on the transformer secondary winding in tested ammeter; Two, another road input port is connected in the output terminal of tested ammeter rectifier bridge in parallel; Load box is connected the output terminal of tested ammeter rectifier bridge with KM2 by contactor KM1; PC is connected with direct supply analyser data communication port by USB interface, controls direct supply analyser and reads and record power consumption data; Direct supply analyser is connected with carrier communication module, provides direct supply to it; Ammeter is connected with carrier communication module by light current interface and realizes the exchanges data between the two; Field working conditions analogue unit respectively with carrier communication module with copy control device be connected; Copy control device and be connected with PC by RS232 interface, copy control device by PC control, the interior related data of the required ammeter reading and the time interval of reading when test is set.
3. a kind of method that judges single-phase carrier intelligent electric meter mistake power down failure cause according to claim 2, it is characterized in that, described field working conditions analogue unit comprises input port, output port, carrier wave attenuator, line of electric force capacitive load simulator, line of electric force inductive load simulator and contactless contactor K1 and K2; Carrier wave attenuator, line of electric force capacitive load simulator and the parallel connection of line of electric force inductive load simulator are connected between input interface and output interface by contactless contactor K1 and K2.
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| CN114114130A (en) * | 2021-09-18 | 2022-03-01 | 宁夏隆基宁光仪表股份有限公司 | Electric energy meter testing method, system and device based on actual load on simulation site |
| CN114114130B (en) * | 2021-09-18 | 2024-05-14 | 宁夏隆基宁光仪表股份有限公司 | Electric energy meter testing method, system and device based on simulation site actual load |
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Effective date of registration: 20180801 Address after: 330096 No. 88, min Qiang Road, private science and Technology Park, Nanchang, Jiangxi Co-patentee after: State Grid Corporation of China Patentee after: Power Science Research Institute of Jiangxi Electric Power Co., Ltd. Address before: 100761 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing Co-patentee before: State's net Jiangxi Province Electric power Science Academe Patentee before: State Grid Corporation of China |