CN104062496B - Portable mobile electric testing recorder and optimization method therefor - Google Patents

Abstract

The invention discloses a portable mobile electric testing recorder and an optimization method therefor, and relates to electric measurement. The recorder and the optimization method are used for power generation management of a power system, and achieve measurement. More specifically, the invention discloses the recorder which is convenient and portable, and has functions of storage and calculation. The recorder comprises a current clamp, a voltage clamp, a housing, and a control circuit board. The current clamp and the voltage clamp are movably inserted in the housing. The control circuit board is provided with a collection and analysis module, a memory database, a central processor, a storage module, and a display module. The other end of the current clamp and the other end of the voltage clamp are connected with a power distribution network, and a basic signal of the power distribution network is collected. The input end of the collection and analysis module is connected with the output end of the current clamp and the output end of the voltage clamp. The memory database is connected with the output end of the collection and analysis module and the central processor. The output end of the central processor is connected with the display module and the storage module.

Description

A portable mobile power test recorder and its optimization method

technical field

The present invention relates to a portable mobile electric quantity test recorder and its optimization method, which relate to electric quantity measurement, and are a device and an optimization method applied to the electric power system for measurement in electric power production management. More specifically, it is a portable mobile, A power test recorder with storage and calculation functions.

Background technique

Power system theoretical line loss calculation requirements: all basic power data are at the same time, and one value per hour. Its purpose is to achieve fine management, reduce loss and save energy. According to the current power system application situation, some use portable meters and manually go to the site to transcribe once every hour. The manual transcribed data is inaccurate, has large errors, heavy workload, and high labor costs. Some directly install ammeters in the station area, and when the data is needed, the manual arrives at the scene and transcribes every hour. In addition to the above-mentioned defects, this method also increases the investment of the power company.

Contents of the invention

The purpose of the present invention is to provide a portable mobile power test recorder and its optimization method in view of the above deficiencies. It adopts a modular design and simplifies the coupling between the modules to the greatest extent, so as to realize the interval of the load lines in the station area. Real-time power measurement, statistics and storage.

A portable mobile power test recorder and its optimization method are realized by adopting the following technical solutions:

A portable mobile electricity test recorder includes a clamp-shaped current clamp, a voltage clamp, a housing and a control circuit board. The current clamp and the voltage clamp are movably inserted into the housing, and the control circuit board is equipped with an acquisition and analysis module, a memory database, The central processing unit, the storage module and the display module, the other end of the clamp current clamp and the voltage clamp are connected to the distribution network, and the basic signals of the distribution network are collected; the basic signals include A-phase voltage, B-phase voltage, and C-phase voltage , A-phase current, B-phase current and C-phase current; the input terminal of the collection and analysis module is connected with the output terminals of the current clamp and the voltage clamp, and the memory database is connected with the output terminal of the collection and analysis module and the central processing unit respectively, and the central processing unit The output end is connected with the display module and the storage module.

The acquisition and analysis module converts the large voltage signal at the input terminal into a small voltage signal from the voltage clamp, and the current clamp converts the large current signals of A-phase current, B-phase current and C-phase current into small current signals in proportion, and then passes through a high-precision The sampling resistance is converted into a voltage signal; converted into a digital signal through the analog-to-digital converter installed in the acquisition and analysis module, and the three-phase voltage and three-phase current values are analyzed and stored in the memory database; the central processing unit will read from the memory database The three-phase voltage and three-phase current values are integrated with time to calculate the power data; the value and curve of the power data are transmitted to the display module for display, and the statistical results are transmitted to the storage module for storage.

The large voltage signal is 57.7V, and the small voltage signal is 5V.

The high current signal is 5A, and the small current signal is 5mA.

The central processor adopts a commercially available TMS320F2812PGFA processor.

The power data includes the total, peak, flat, valley, and peak values of forward active energy, the total, peak, flat, valley, and peak values of reverse active energy, and the total, peak, and peak values of forward reactive energy. , flat, valley, peak value, total, peak, flat, valley, peak value of reverse reactive power, power consumption in time period.

The calculation formula of the power consumption is: power consumption = active energy difference × current ratio × pressure ratio, wherein the current ratio is the ratio between the primary side and the secondary side of the current (for example, 300/5=60); It is the ratio of the voltage primary side to the secondary side (for example, 100000/100=1000).

The storage module is connected with the central processing unit through the bus, and stores the power data for a long time.

The display module is connected with the central processing unit through the bus, receives and displays the numerical value and the curve of the power data.

The bus adopts 485 bus.

The shell, clamp-shaped current clamp and voltage clamp are made of PVC material, which ensures safety and portability. It is safe to use the clamp current clamp to take the current, the human body does not touch the live conductor, the operation is very safe, and the circuit does not need to be disconnected, and the process is very simple. It is convenient and quick to use voltage clamps for wiring.

A data optimization method for a portable mobile power test recorder, comprising the following steps:

1) The current clamp and voltage clamp connected to the distribution network collect the basic signals of the distribution network, and transmit the basic signals to the acquisition and analysis module; the basic signals include A-phase voltage, B-phase voltage, and C-phase voltage , Phase A current, Phase B current and Phase C current;

2) The acquisition and analysis module analyzes the basic signals collected in step (1), and forwards the analysis results to the memory database; and stores them using an optimization method. The optimization formula is: (1+numerator factor÷denominator factor)×basic value, Among them, the numerator factor is represented by 2 bytes, the denominator factor is represented by 4 bytes, and the basic value is represented by 8 bytes;

3) The central processing unit reads the three-phase voltage and three-phase current values in the memory database, and then calculates various power data and forwards them to the storage module and display module;

4) The central processing unit reads the electric energy data in the memory database in real time;

5) The storage module stores the data for a long time according to the data transmitted by the central processing unit;

6) The display module updates and displays these data in real time according to the information transmitted by the central processing unit.

The invention has the advantages of convenient line loss calculation, easy portability and on-site installation, reduces the error of electric quantity data; improves the accuracy of electric quantity data; saves labor cost and reduces labor intensity; test recorder.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing:

Fig. 1 is a schematic flow chart of a portable mobile power test recorder and its optimization method according to the present invention.

detailed description

With reference to accompanying drawing 1, a kind of portable mobile electric quantity test recorder comprises clamp current clamp, voltage clamp, housing and control circuit board, and current clamp and voltage clamp are movably installed and inserted in the housing, and the control circuit board is equipped with acquisition and analysis Module, memory database, central processing unit, storage module and display module, the other end of the clamp-type current clamp and voltage clamp are connected to the distribution network, and the basic signals of the distribution network are collected; the basic signals include A-phase voltage, B-phase Voltage, C-phase voltage, A-phase current, B-phase current and C-phase current; the input terminal of the collection and analysis module is connected to the output terminal of the current clamp and the voltage clamp, and the memory database is respectively connected to the output terminal of the collection and analysis module and the central processing unit , the output terminal of the central processing unit is connected with the display module and the storage module.

The acquisition and analysis module converts the large voltage signal at the input terminal into a small voltage signal from the voltage clamp, and the current clamp converts the large current signals of A-phase current, B-phase current and C-phase current into small current signals in proportion, and then passes through a high-precision The sampling resistance is converted into a voltage signal; converted into a digital signal through the analog-to-digital converter installed in the acquisition and analysis module, and the three-phase voltage and three-phase current values are analyzed and stored in the memory database; the central processing unit will read from the memory database The three-phase voltage and three-phase current values are integrated with time to calculate the power data; the value and curve of the power data are transmitted to the display module for display, and the statistical results are transmitted to the storage module for storage.

The large voltage signal is 57.7V, and the small voltage signal is 5V.

The high current signal is 5A, and the small current signal is 5mA.

The central processor adopts a commercially available TMS320F2812PGFA processor.

The power data includes the total, peak, flat, valley, and peak values of forward active energy, the total, peak, flat, valley, and peak values of reverse active energy, and the total, peak, and peak values of forward reactive energy. , flat, valley, peak value, total, peak, flat, valley, peak value of reverse reactive power, power consumption in time period.

The calculation formula of the power consumption is: power consumption = active energy difference × current ratio × pressure ratio, wherein the current ratio is the ratio between the primary side and the secondary side of the current (for example, 300/5=60); It is the ratio of the voltage primary side to the secondary side (for example, 100000/100=1000).

The storage module is connected with the central processing unit through the bus, and stores the power data for a long time.

The display module is connected with the central processing unit through the bus, receives and displays the numerical value and the curve of the power data.

The bus adopts 485 bus.

The shell, clamp-shaped current clamp and voltage clamp are made of PVC material, which ensures safety and portability. It is safe to use the clamp current clamp to take the current, the human body does not touch the live conductor, the operation is very safe, and the circuit does not need to be disconnected, and the process is very simple. It is convenient and quick to use voltage clamps for wiring.

A data optimization method for a portable mobile power test recorder, comprising the following steps:

1) The current clamp and voltage clamp connected to the distribution network collect the basic signals of the distribution network, and transmit the basic signals to the acquisition and analysis module; the basic signals include A-phase voltage, B-phase voltage, and C-phase voltage , Phase A current, Phase B current and Phase C current;

2) The acquisition and analysis module analyzes the basic signals collected in step (1), and forwards the analysis results to the memory database; and stores them using an optimization method. The optimization formula is: (1+numerator factor÷denominator factor)×basic value, Among them, the numerator factor is represented by 2 bytes, the denominator factor is represented by 4 bytes, and the basic value is represented by 8 bytes; a monitoring point needs to store 20 data at a time, and it needs to be stored 288 times a day. According to conventional storage, Each data is represented by an 8-byte floating-point number, and the storage space is: 20×288×8 = 46080 bytes. However, if the optimized method is used for storage, the storage space is: 20×(2×288+4+8)=11760 bytes. The actual saving is 34320 bytes, and the saving percentage is: (46080－11760)÷46080×100%＝74.48%;

3) The central processing unit reads the three-phase voltage and three-phase current values in the memory database, and then calculates various power data and forwards them to the storage module and display module;

4) The central processing unit reads the electric energy data in the memory database in real time;

5) The storage module stores the data for a long time according to the data transmitted by the central processing unit;

6) The display module updates and displays these data information in real time according to the information transmitted by the central processing unit.

Claims (6)

1. a kind of Portable electric quantity test monitor, it is characterised in that：Including pincerlike current clamp, voltage clamp, housing and control Circuit board processed, current clamp and voltage clamp activity are plugged in housing, are provided with collection analysises module, interior poke in control board It is connected with power distribution network according to the other end of storehouse, central processing unit, memory module and display module, current clamp and voltage clamp, collection is matched somebody with somebody The baseband signal of electrical network；The baseband signal includes that A phase voltages, B phase voltages, C phase voltages, A phase currents, B phase currents are electric with C phases Stream；The input of collection analysises module is connected with the outfan of current clamp and voltage clamp, memory database respectively with collection analysises The outfan and central processing unit of module is connected, and the outfan of central processing unit is connected with display module and memory module；

The big voltage signal of input is converted into small voltage signal from voltage clamp by collection analysises module, current clamp by A phase currents, The high current signal of B phase currents and C phase currents changes into small current signal in proportion, then is turned by a high-precision sampling resistor Into voltage signal；Digital signal is changed into by the analog-digital converter in collection analysises module, three-phase voltage is analyzed With three-phase current numerical value and it is stored in memory database；Central processing unit is by the three-phase voltage and three read from memory database Phase current numerical value and time integral, calculate electric quantity data；The numerical value and curve transmission of electric quantity data are carried out to display module Show, and statistical result is transferred to into memory module and stored；

The data optimization methods of Portable electric quantity test monitor, comprise the steps：

1）The current clamp that is connected with power distribution network, voltage clamp gather the baseband signal of power distribution network net, and the baseband signal is transmitted Give collection analysises module；The baseband signal includes A phase voltages, and B phase voltages, C phase voltages, A phase currents, B phase currents are electric with C phases Stream；

2）Collection analysises module is by step 1）In the baseband signal that collects be analyzed, and analysis result is transmitted to into interior poke According to storehouse；And stored using optimization method, optimization formula is：（1+ molecule factor ÷ denominator factors）× basic numerical value, wherein molecule Factor 2 byte representations, 4 byte representations of denominator factor, 8 byte representations of basic numerical value；

3）Central processing unit reads three-phase voltage and three-phase current numerical value in memory database, then various by calculating Electric quantity data, and it is transmitted to memory module and display module；

4）Central processing unit reads the electric energy data in memory database in real time；

5）The data that memory module is transmitted according to central processing unit, preserve these data for a long time；

6）The information that display module is transmitted according to central processing unit, real-time update show these data messages.

2. Portable electric quantity test monitor according to claim 1, it is characterised in that：The big voltage signal is 57.7V voltages, small voltage signal are 5V voltages.

3. Portable electric quantity test monitor according to claim 1, it is characterised in that：The high current signal is 5A, small current signal are 5mA.

4. Portable electric quantity test monitor according to claim 1, it is characterised in that：The central processing unit is adopted Use TMS320F2812PGFA processors.

5. Portable electric quantity test monitor according to claim 1, it is characterised in that：Described electric quantity data bag Include the total of positive active electrical degree, peak, flat, paddy and sharp value, the total of reverse active electrical degree, peak, flat, paddy and point value, positive idle electricity The total of degree, peak, flat, paddy and point value, reverse the total of idle electric degree, peak, flat, paddy and point value, the power consumption of time period.

6. Portable electric quantity test monitor according to claim 5, it is characterised in that：The calculating of the power consumption Formula is：Power consumption=active electrical degree difference × flow ratio × pressure ratio, wherein flow ratio are the ratios of electric current primary side and secondary side Value；Pressure ratio is the ratio of voltage primary side and secondary side.