CN104901706A - Digital electric energy quality monitoring terminal monitoring device and data converting method thereof - Google Patents
Digital electric energy quality monitoring terminal monitoring device and data converting method thereof Download PDFInfo
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- CN104901706A CN104901706A CN201510308581.XA CN201510308581A CN104901706A CN 104901706 A CN104901706 A CN 104901706A CN 201510308581 A CN201510308581 A CN 201510308581A CN 104901706 A CN104901706 A CN 104901706A
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Abstract
The present invention relates to a digital electric energy quality monitoring terminal monitoring device. The device includes a terminal to be detected, a digital recorder and a standard source; the digital recorder is connected to the terminal to be detected via a communication terminal; the standard source is connected to the digital recorder via an analog terminal; the standard source is used for inputting voltage and current analog signals into the digital recorder; the digital recorder is used for converting the voltage and current analog signals input by the standard source into sampling value messages, and sending the sampling value messages to the terminal to be detected; and the terminal to be detected is used for receiving the sampling value messages sent by the digital recorder. The voltage and current analog signals of the standard source are converted into 9-1, 9-2 message sampling values via the digital recorder, and then transmitted to the terminal to be detected, so that the accuracy and functions of the terminal to be detected accessing the network are detected, and the cost of the apparatus for outputting the sampling values is reduced at the same time.
Description
Technical field
The present invention relates to a kind of checkout gear and data transfer device thereof, especially a kind of digitalized electric energy quality monitoring terminal checkout gear and data transfer device thereof, belong to electric energy quality monitoring field.
Background technology
DEFLATE is the lossless data compression algorithms simultaneously employing LZ77 algorithm and Huffman encoding (Huffman Coding), the PKZIP that it is at first is him by Phil Katz files the instrument second edition and defines, and is defined in afterwards in RFC 1951 specification.
The key equipment of being correlated with along with intelligent grid, the development of key technology obtain important breakthrough and extensive use, and the construction proportion of intelligent substation progressively strengthens.Relative to traditional transformer station, intelligent substation adopts digital voltage instrument transformer summation current transformer, adopts binary system communication packet to transmit sampled value, a large amount of uses saving cable, cable.For the digital sampled value transmission of intelligent substation, digitalized electric energy quality monitoring terminal must be adopted to carry out power quality index monitoring.And the digital sample values of digitalized electric energy quality monitoring terminal is detected as in order to a new problem.For adopting digital voltage electric energy quality monitoring terminal manufacturer, current transformer comes for digitalized electric energy quality monitoring terminal transmission sampled value, is undoubtedly a high cost for the precision of sense terminals and function, realizes the scheme of circumstance complication.
Summary of the invention
The object of the invention is to: for above-mentioned prior art Problems existing, propose a kind of digitalized electric energy quality monitoring terminal checkout gear, to the sampled value needed for digitalized electric energy quality monitoring terminal output project, precision and the Function detection of terminal can be realized.
In order to reach above object, a kind of digitalized electric energy quality monitoring terminal checkout gear of the present invention, comprise terminal to be measured, digitlization oscillograph and standard source, digitlization oscillograph connects terminal to be measured by communication terminal, standard source is connected with digitlization oscillograph by analog quantity terminal, standard source is used for digitlization oscillograph input voltage and input current analog signals, the electric current and voltage analog signal that digitlization oscillograph is used for standard source inputs is converted into sampling value message, and sampling value message is sent to terminal to be measured, the sampling value message that terminal to be measured sends for receiving digitlization oscillograph, digitlization oscillograph contains:
Data sink, the analog signals data sent in order to standard source described in real-time reception;
Compression storage device, carries out Lossless Compression in order to the analog signals data that received by described receiving system by DEFLATE algorithm and stores;
Decompress(ion) interpolating apparatus, in order to carry out numerical analysis by after the analog signal data decompress(ion) of compression by Lagrangian N interpolation algorithm;
Message conversion equipment, in order to be converted into 9-1 and 9-2 message by interpolated data;
Data output device, exports described terminal to be measured in order to conversion to be obtained 9-1 and 9-2 message.
Digitlization oscillograph comprises Three models, and 1) translative mode, the electric current and voltage analog quantity that standard source inputs is converted to the sampling value message of 9-1,9-2, then sends to terminal to be measured by communication terminal; 2) logging mode, the electric current and voltage analog quantity of stored record standard source input is converted into the sampling value message of 9-1,9-2, and is exported to terminal to be measured by remote management and control message; 3) simulation model, each parameter of electric current and voltage analog quantity according to telemanagement setting transforms out corresponding 9-1,9-2 sampling value message, and sends to terminal to be measured by communication terminal.
Preferred version of the present invention is: digitlization oscillograph comprises memory module and telemanagement, the electric current and voltage analog quantity sampling value message that memory module transforms for preserving digitlization oscillograph, and can export by telemanagement the sampling value message preserved to terminal to be measured.
Preferably, digitlization oscillograph can simulate corresponding sampling value message according to the voltage and current parameter of telemanagement setting, then is sent to terminal to be measured by communication terminal.
Preferably, telemanagement comprises data display interface, optimum configurations interface, start record interface, reading and saving sampling value message interface, storage administration interface and wave shape playback interface, data display interface is for showing each parameter and the sampled value waveform of electric current and voltage analog quantity channel, optimum configurations interface is for arranging each parameter and the memory module record rule of electric current and voltage, start outside input is also recorded at record interface sampled value for the pattern of manually booting, sampling value message interface is for reading the record data stored, storage administration interface is used for managing the data recorded in memory module, wave shape playback interface is used for that the sampled value stored is resolved to waveform and now shows.
Preferably, communication terminal is optic fibre connector and Ethernet terminal.
Preferably, Lagrangian N interpolation algorithm (x in a given k+1 data point
0, y
0) ..., (x
k, y
k), wherein x
jcorrespond to the position of independent variable, and y
jbe the corresponding value of described decompress(ion) interpolating apparatus inner function, the Lagrange interpolation polynomial obtained by Lagrange's interpolation formula is
wherein each
for Lagrangian fundamental polynomials (or claiming Interpolation-Radix-Function),
expression formula be
A kind of data transfer device of digitalized electric energy quality monitoring terminal checkout gear, by terminal to be measured, in the device that digitlization oscillograph and standard source are formed, digitlization oscillograph connects terminal to be measured by communication terminal, standard source is connected with digitlization oscillograph by analog quantity terminal, standard source is used for digitlization oscillograph input voltage and input current analog signals, the electric current and voltage analog signal that digitlization oscillograph is used for standard source inputs is converted into sampling value message, and sampling value message is sent to terminal to be measured, the sampling value message that terminal to be measured sends for receiving digitlization oscillograph, it is characterized in that, comprise the following steps:
Data reception step, the analog signals data sent in order to standard source described in real-time reception;
Compression storing step, carries out Lossless Compression in order to the analog signals data that received by described receiving step by DEFLATE algorithm and stores;
Decompress(ion) interpolation procedure, in order to carry out numerical analysis by after the analog signal data decompress(ion) of compression by Lagrangian N interpolation algorithm;
Message switch process, in order to be converted into 9-1 and 9-2 message by interpolated data;
Data export step, export described terminal to be measured in order to conversion to be obtained 9-1 and 9-2 message.
Preferably, Lagrangian N interpolation algorithm (x in a given k+1 data point
0, y
0) ..., (x
k, y
k), wherein x
jcorrespond to the position of independent variable, and y
jbe the corresponding value of described decompress(ion) interpolating apparatus inner function, the Lagrange interpolation polynomial obtained by Lagrange's interpolation formula is
wherein each
for Lagrangian fundamental polynomials (or claiming Interpolation-Radix-Function),
expression formula be
Beneficial effect of the present invention is: by digitlization oscillograph, the electric current and voltage analog quantity of standard source is converted into 9-1,9-2 packet sampling value, be transferred to terminal to be measured again, the precision that can network to terminal to be measured and Function detection, effectively reduce the cost exporting sampled value equipment simultaneously.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Fig. 1 is structural representation of the present invention.
Fig. 2 is workflow schematic diagram of the present invention.
Embodiment
Embodiment one
A kind of digitalized electric energy quality monitoring terminal checkout gear of the present embodiment, as shown in Figure 1, comprise terminal 1 to be measured, digitlization oscillograph 2 and standard source 3, digitlization oscillograph 2 connects terminal to be measured by optic fibre connector 4 or Ethernet terminal 5, standard source logical 3 is crossed analog quantity terminal 6 and is connected with digitlization oscillograph 2, standard source 3 is for digitlization oscillograph 2 input voltage and input current analog signals, digitlization oscillograph 2 is converted into sampling value message for the electric current and voltage analog signal inputted by standard source 3, and sampling value message is sent to terminal 1 to be measured, the sampling value message that terminal 1 to be measured sends for receiving digitlization oscillograph 2, digitlization oscillograph 2 contains:
Data sink, the analog signals data sent in order to standard source described in real-time reception;
Compression storage device, carries out Lossless Compression in order to the analog signals data that received by described receiving system by DEFLATE algorithm and stores;
Decompress(ion) interpolating apparatus, in order to carry out numerical analysis by after the analog signal data decompress(ion) of compression by Lagrangian N interpolation algorithm;
Message conversion equipment, in order to be converted into 9-1 and 9-2 message by interpolated data;
Data output device, exports described terminal to be measured in order to conversion to be obtained 9-1 and 9-2 message.
Lagrange N interpolation algorithm (x in a given k+1 data point
0, y
0) ..., (x
k, y
k), wherein x
jcorrespond to the position of independent variable, and y
jbe the corresponding value of described decompress(ion) interpolating apparatus inner function, the Lagrange interpolation polynomial obtained by Lagrange's interpolation formula is
wherein each
for Lagrangian fundamental polynomials (or claiming Interpolation-Radix-Function),
expression formula be
In the present embodiment, be every cycle 80 point sampling of 9-1 by every cycle 128 point sampling interpolation, adopt Lagrange 2 interpolation algorithms, N=2.
So each sampled point after interpolation
n is sampling sequence number
Due to before interpolation and interpolation after first sample values completely equal, therefore with second interpolated data be
F example.Get the 2nd sampled point of 128 point samplings, the 3rd sampled point, the 4th sampled point, their f value is f (1)=2.8332, f (2)=5.6595, f (3)=8.4722;
First sampled point of 80 point samplings
Each Lagrangian fundamental polynomials:
Then apply Lagrange's interpolation, just can obtain the expression formula (p is the interpolating function of function f) of p:
p(x)＝f(2)l
0(x)+f(3)l
1(x)+f(4)l
2(x)
As x=1.6, l
0(x)=0.28, l
1(x)=0.84, l
2(x)=-0.12
p(1.6)＝2.8332*0.28+5.6595*0.84+8.4722*(-0.12)＝4.5306
Following table is the functional value table of 128 point samplings
| Sequence number | Function | Value |
| 0 | f(0) | 0.0000 |
| 1 | f(1) | 2.8332 |
| 2 | f(2) | 5.6595 |
| 3 | f(3) | 8.4722 |
| 4 | f(4) | 11.2645 |
| 5 | f(5) | 14.0297 |
| 6 | f(6) | 16.7610 |
| 7 | f(7) | 19.4520 |
| 8 | f(8) | 22.0961 |
| 9 | f(9) | 24.6870 |
| 10 | f(10) | 27.2184 |
| 11 | f(11) | 29.6843 |
| 12 | f(12) | 32.0786 |
| 13 | f(13) | 34.3957 |
| 14 | f(14) | 36.6299 |
| 15 | f(15) | 38.7758 |
| 16 | f(16) | 40.8283 |
| 17 | f(17) | 42.7825 |
| 18 | f(18) | 44.6336 |
| 19 | f(19) | 46.3772 |
| 20 | f(20) | 48.0091 |
| 21 | f(21) | 49.5252 |
| 22 | f(22) | 50.9221 |
| 23 | f(23) | 52.1963 |
| 24 | f(24) | 53.3448 |
| 25 | f(25) | 54.3648 |
| 26 | f(26) | 55.2537 |
| 27 | f(27) | 56.0096 |
| 28 | f(28) | 56.6305 |
| 29 | f(29) | 57.1151 |
| 30 | f(30) | 57.4620 |
| 31 | f(31) | 57.6704 |
| 32 | f(32) | 57.7400 |
| 33 | f(33) | 57.6704 |
| 34 | f(34) | 57.4620 |
| 35 | f(35) | 57.1151 |
| 36 | f(36) | 56.6305 |
| 37 | f(37) | 56.0096 |
| 38 | f(38) | 55.2537 |
| 39 | f(39) | 54.3648 |
| 40 | f(40) | 53.3448 |
| 41 | f(41) | 52.1963 |
| 42 | f(42) | 50.9221 |
| 43 | f(43) | 49.5252 |
| 44 | f(44) | 48.0091 |
| 45 | f(45) | 46.3772 |
| 46 | f(46) | 44.6336 |
| 47 | f(47) | 42.7825 |
| 48 | f(48) | 40.8283 |
| 49 | f(49) | 38.7758 |
| 50 | f(50) | 36.6299 |
| 51 | f(51) | 34.3957 |
| 52 | f(52) | 32.0786 |
| 53 | f(53) | 29.6843 |
| 54 | f(54) | 27.2184 |
| 55 | f(55) | 24.6870 |
| 56 | f(56) | 22.0961 |
| 57 | f(57) | 19.4520 |
| 58 | f(58) | 16.7610 |
| 59 | f(59) | 14.0297 |
| 60 | f(60) | 11.2645 |
| 61 | f(61) | 8.4722 |
| 62 | f(62) | 5.6595 |
| 63 | f(63) | 2.8332 |
| 64 | f(64) | 0.0000 |
| 65 | f(65) | -2.8332 |
| 66 | f(66) | -5.6595 |
| 67 | f(67) | -8.4722 |
| 68 | f(68) | -11.2645 |
| 69 | f(69) | -14.0297 |
| 70 | f(70) | -16.7610 |
| 71 | f(71) | -19.4520 |
| 72 | f(72) | -22.0961 |
| 73 | f(73) | -24.6870 |
| 74 | f(74) | -27.2184 |
| 75 | f(75) | -29.6843 |
| 76 | f(76) | -32.0786 |
| 77 | f(77) | -34.3957 |
| 78 | f(78) | -36.6299 |
| 79 | f(79) | -38.7758 |
| 80 | f(80) | -40.8283 |
| 81 | f(81) | -42.7825 |
| 82 | f(82) | -44.6336 |
| 83 | f(83) | -46.3772 |
| 84 | f(84) | -48.0091 |
| 85 | f(85) | -49.5252 |
| 86 | f(86) | -50.9221 |
| 87 | f(87) | -52.1963 |
| 88 | f(88) | -53.3448 |
| 89 | f(89) | -54.3648 |
| 90 | f(90) | -55.2537 |
| 91 | f(91) | -56.0096 |
| 92 | f(92) | -56.6305 |
| 93 | f(93) | -57.1151 |
| 94 | f(94) | -57.4620 |
| 95 | f(95) | -57.6704 |
| 96 | f(96) | -57.7400 |
| 97 | f(97) | -57.6704 |
| 98 | f(98) | -57.4620 |
| 99 | f(99) | -57.1151 |
| 100 | f(100) | -56.6305 |
| 101 | f(101) | -56.0096 |
| 102 | f(102) | -55.2537 |
| 103 | f(103) | -54.3648 |
| 104 | f(104) | -53.3448 |
| 105 | f(105) | -52.1963 |
| 106 | f(106) | -50.9221 |
| 107 | f(107) | -49.5252 |
| 108 | f(108) | -48.0091 |
| 109 | f(109) | -46.3772 |
| 110 | f(110) | -44.6336 |
| 111 | f(111) | -42.7825 |
| 112 | f(112) | -40.8283 |
| 113 | f(113) | -38.7758 |
| 114 | f(114) | -36.6299 |
| 115 | f(115) | -34.3957 |
| 116 | f(116) | -32.0786 |
| 117 | f(117) | -29.6843 |
| 118 | f(118) | -27.2184 |
| 119 | f(119) | -24.6870 |
| 120 | f(120) | -22.0961 |
| 121 | f(121) | -19.4520 |
| 122 | f(122) | -16.7610 |
| 123 | f(123) | -14.0297 |
| 124 | f(124) | -11.2645 |
| 125 | f(125) | -8.4722 |
| 126 | f(126) | -5.6595 |
| 127 | f(127) | -2.8332 |
| 128 | f(128) | 0.0000 |
| 129 | f(129) | 2.8332 |
| 130 | f(130) | 5.6595 |
Following table is the calculated value table of 80 point samplings
| Sequence number | Function | x0 | x1 | x2 | l0(x) | l1(x) | l2(x) | p(x) |
| 0 | f(0) | 0 | 1 | 2 | 1.0000 | 0.0000 | 0.0000 | 0.0000 |
| 1 | f(1.6) | 1 | 2 | 3 | 1.2800 | 0.8400 | -0.12 | 4.5287 |
| 2 | f(3.2) | 3 | 4 | 5 | 0.7200 | 0.3600 | -0.0800 | 9.0328 |
| 3 | f(4.8) | 5 | 6 | 7 | 1.3200 | -0.4400 | 0.1200 | 13.4786 |
| 4 | f(6.4) | 6 | 7 | 8 | 0.4800 | 0.6400 | -0.1200 | 17.8431 |
| 5 | f(8) | 8 | 9 | 10 | 1.0000 | 0.0000 | 0.0000 | 22.0961 |
| 6 | f(9.6) | 10 | 11 | 12 | 1.6800 | -0.9600 | 0.2800 | 26.2121 |
| 7 | f(11.2) | 11 | 12 | 13 | 0.7200 | 0.3600 | -0.0800 | 30.1693 |
| 8 | f(12.8) | 13 | 14 | 15 | 1.3200 | -0.4400 | 0.1200 | 33.9383 |
| 9 | f(14.4) | 14 | 15 | 16 | 0.4800 | 0.6400 | -0.1200 | 37.4995 |
| 10 | f(16) | 16 | 17 | 18 | 1.0000 | 0.0000 | 0.0000 | 40.8283 |
| 11 | f(17.6) | 18 | 19 | 20 | 1.6800 | -0.9600 | 0.2800 | 43.9049 |
| 12 | f(19.2) | 19 | 20 | 21 | 0.7200 | 0.3600 | -0.0800 | 46.7128 |
| 13 | f(20.8) | 21 | 22 | 23 | 1.3200 | -0.4400 | 0.1200 | 49.2312 |
| 14 | f(22.4) | 22 | 23 | 24 | 0.4800 | 0.6400 | -0.1200 | 51.4469 |
| 15 | f(24) | 24 | 25 | 26 | 1.0000 | 0.0000 | 0.0000 | 53.3448 |
| 16 | f(25.6) | 26 | 27 | 28 | 1.6800 | -0.9600 | 0.2800 | 54.9136 |
| 17 | f(27.2) | 27 | 28 | 29 | 0.7200 | 0.3600 | -0.0800 | 56.1447 |
| 18 | f(28.8) | 29 | 30 | 31 | 1.3200 | -0.4400 | 0.1200 | 57.0291 |
| 19 | f(30.4) | 30 | 31 | 32 | 0.4800 | 0.6400 | -0.1200 | 57.5620 |
| 20 | f(32) | 32 | 33 | 34 | 1.0000 | 0.0000 | 0.0000 | 57.7400 |
| 21 | f(33.6) | 34 | 35 | 36 | 1.6800 | -0.9600 | 0.2800 | 57.5622 |
| 22 | f(35.2) | 35 | 36 | 37 | 0.7200 | 0.3600 | -0.0800 | 57.0291 |
| 23 | f(36.8) | 37 | 38 | 39 | 1.3200 | -0.4400 | 0.1200 | 56.1448 |
| 24 | f(38.4) | 38 | 39 | 40 | 0.4800 | 0.6400 | -0.1200 | 54.9139 |
| 25 | f(40) | 40 | 41 | 42 | 1.0000 | 0.0000 | 0.0000 | 53.3448 |
| 26 | f(41.6) | 42 | 43 | 44 | 1.6800 | -0.9600 | 0.2800 | 51.4475 |
| 27 | f(43.2) | 43 | 44 | 45 | 0.7200 | 0.3600 | -0.0800 | 49.2313 |
| 28 | f(44.8) | 45 | 46 | 47 | 1.3200 | -0.4400 | 0.1200 | 46.7130 |
| 29 | f(46.4) | 46 | 47 | 48 | 0.4800 | 0.6400 | -0.1200 | 43.9055 |
| 30 | f(48) | 48 | 49 | 50 | 1.0000 | 0.0000 | 0.0000 | 40.8283 |
| 31 | f(49.6) | 50 | 51 | 52 | 1.6800 | -0.9600 | 0.2800 | 37.5003 |
| 32 | f(51.2) | 51 | 52 | 53 | 0.7200 | 0.3600 | -0.0800 | 33.9384 |
| 33 | f(52.8) | 53 | 54 | 55 | 1.3200 | -0.4400 | 0.1200 | 30.1696 |
| 34 | f(54.4) | 54 | 55 | 56 | 0.4800 | 0.6400 | -0.1200 | 26.2130 |
| 35 | f(56) | 56 | 57 | 58 | 1.0000 | 0.0000 | 0.0000 | 22.0961 |
| 36 | f(57.6) | 58 | 59 | 60 | 1.6800 | -0.9600 | 0.2800 | 17.8441 |
| 37 | f(59.2) | 59 | 60 | 61 | 0.7200 | 0.3600 | -0.0800 | 13.4788 |
| 38 | f(60.8) | 61 | 62 | 63 | 1.3200 | -0.4400 | 0.1200 | 9.0331 |
| 39 | f(62.4) | 62 | 63 | 64 | 0.4800 | 0.6400 | -0.1200 | 4.5298 |
| 40 | f(64) | 64 | 65 | 66 | 1.0000 | 0.0000 | 0.0000 | 0.0000 |
| 41 | f(65.6) | 66 | 67 | 68 | 1.6800 | -0.9600 | 0.2800 | -4.5287 |
| 42 | f(67.2) | 67 | 68 | 69 | 0.7200 | 0.3600 | -0.0800 | -9.0328 |
| 43 | f(68.8) | 69 | 70 | 71 | 1.3200 | -0.4400 | 0.1200 | -13.4786 |
| 44 | f(70.4) | 70 | 71 | 72 | 0.4800 | 0.6400 | -0.1200 | -17.8431 |
| 45 | f(72) | 72 | 73 | 74 | 1.0000 | 0.0000 | 0.0000 | -22.0961 |
| 46 | f(73.6) | 74 | 75 | 76 | 1.6800 | -0.9600 | 0.2800 | -26.2121 |
| 47 | f(75.2) | 75 | 76 | 77 | 0.7200 | 0.3600 | -0.0800 | -30.1693 |
| 48 | f(76.8) | 77 | 78 | 79 | 1.3200 | -0.4400 | 0.1200 | -33.9383 |
| 49 | f(78.4) | 78 | 79 | 80 | 0.4800 | 0.6400 | -0.1200 | -37.4995 |
| 50 | f(80) | 80 | 81 | 82 | 1.0000 | 0.0000 | 0.0000 | -40.8283 |
| 51 | f(81.6) | 82 | 83 | 84 | 1.6800 | -0.9600 | 0.2800 | -43.9049 |
| 52 | f(83.2) | 83 | 84 | 85 | 0.7200 | 0.3600 | -0.0800 | -46.7128 |
| 53 | f(84.8) | 85 | 86 | 87 | 1.3200 | -0.4400 | 0.1200 | -49.2312 |
| 54 | f(86.4) | 86 | 87 | 88 | 0.4800 | 0.6400 | -0.1200 | -51.4469 |
| 55 | f(88) | 88 | 89 | 90 | 1.0000 | 0.0000 | 0.0000 | -53.3448 |
| 56 | f(89.6) | 90 | 91 | 92 | 1.6800 | -0.9600 | 0.2800 | -54.9136 |
| 57 | f(91.2) | 91 | 92 | 93 | 0.7200 | 0.3600 | -0.0800 | -56.1447 |
| 58 | f(92.8) | 93 | 94 | 95 | 1.3200 | -0.4400 | 0.1200 | -57.0291 |
| 59 | f(94.4) | 94 | 95 | 96 | 0.4800 | 0.6400 | -0.1200 | -57.5620 |
| 60 | f(96) | 96 | 97 | 98 | 1.0000 | 0.0000 | 0.0000 | -57.7400 |
| 61 | f(97.6) | 98 | 99 | 100 | 1.6800 | -0.9600 | 0.2800 | -57.5622 |
| 62 | f(99.2) | 99 | 100 | 101 | 0.7200 | 0.3600 | -0.0800 | -57.0291 |
| 63 | f(100.8) | 101 | 102 | 103 | 1.3200 | -0.4400 | 0.1200 | -56.1448 |
| 64 | f(102.4) | 102 | 103 | 104 | 0.4800 | 0.6400 | -0.1200 | -54.9139 |
| 65 | f(104) | 104 | 105 | 106 | 1.0000 | 0.0000 | 0.0000 | -53.3448 |
| 66 | f(105.6) | 106 | 107 | 108 | 1.6800 | -0.9600 | 0.2800 | -51.4475 |
| 67 | f(107.2) | 107 | 108 | 109 | 0.7200 | 0.3600 | -0.0800 | -49.2313 |
| 68 | f(108.8) | 109 | 110 | 111 | 1.3200 | -0.4400 | 0.1200 | -46.7130 |
| 69 | f(110.4) | 110 | 111 | 112 | 0.4800 | 0.6400 | -0.1200 | -43.9055 |
| 70 | f(112) | 112 | 113 | 114 | 1.0000 | 0.0000 | 0.0000 | -40.8283 |
| 71 | f(113.6) | 114 | 115 | 116 | 1.6800 | -0.9600 | 0.2800 | -37.5003 |
| 72 | f(115.2) | 115 | 116 | 117 | 0.7200 | 0.3600 | -0.0800 | -33.9384 |
| 73 | f(116.8) | 117 | 118 | 119 | 1.3200 | -0.4400 | 0.1200 | -30.1696 |
| 74 | f(118.4) | 118 | 119 | 120 | 0.4800 | 0.6400 | -0.1200 | -26.2130 |
| 75 | f(120) | 120 | 121 | 122 | 1.0000 | 0.0000 | 0.0000 | -22.0961 |
| 76 | f(121.6) | 122 | 123 | 124 | 1.6800 | -0.9600 | 0.2800 | -17.8441 |
| 77 | f(123.2) | 123 | 124 | 125 | 0.7200 | 0.3600 | -0.0800 | -13.4788 |
| 78 | f(124.8) | 125 | 126 | 127 | 1.3200 | -0.4400 | 0.1200 | -9.0331 |
| 79 | f(126.4) | 126 | 127 | 128 | 0.4800 | 0.6400 | -0.1200 | -4.5298 |
| 80 | f(128) | 128 | 129 | 130 | 1.0000 | 0.0000 | 0.0000 | 0.0000 |
Digitlization oscillograph 2 comprises memory module and telemanagement, electric current and voltage analog quantity 9-1,9-2 sampling value message that memory module transforms for preserving digitlization oscillograph, and can export by telemanagement the sampling value message preserved to terminal to be measured.
Digitlization oscillograph 2 has Three models to select, and is respectively:
1) translative mode
Under translative mode, the electric current and voltage analog quantity that standard source cabinet inputs is converted to 9-1 by digitlization oscillograph, the sampling value message of 9-2, is sent to terminal to be measured by optic fibre connector and Ethernet terminal.
2) logging mode
Under logging mode, the electric current and voltage analog quantity that standard source cabinet inputs is converted to 9-1 by digitlization oscillograph, the sampling value message of 9-2, and is kept in the storage medium of digitlization oscillograph.The sampling value message preserved can be exported to terminal to be measured by digital control oscillograph by telemanagement.
3) simulation model
Under simulation model, the parameter simulations such as the effective value set according to telemanagement, phase place are gone out 9-1, the sampling value message of 9-2 by digitlization oscillograph, are sent to terminal to be measured by optic fibre connector and Ethernet terminal.
The telemanagement of digitlization oscillograph is divided into data display interface, optimum configurations interface, starts record interface, sampling value message interface, storage administration interface and wave shape playback interface.
1) data display interface
By data display interface can the voltage of display simulation amount passage, electric current, harmonic wave equivalence size.
The electric current and voltage sampled value waveform in several cycle can be shown.
2) optimum configurations interface
The sampled value sequence number of 9-2 can be set by optimum configurations interface.
Arrange the record rule of logging mode, rule is divided into length records of fixing time, determines the large small records of record block, start by set date record etc.
The parameter such as voltage, electric current, harmonic value under simulation model is set.
3) record interface is started
Logging mode can be started, the sampled value of the outside input of record by the start-up performance starting record interface manual.
4) reading and saving sampling value message interface
The record data stored can be read in reading and saving sampling value message interface, are shown by record data.
5) storage administration interface
Space and vacant space have been used for showing in current storage medium in storage administration interface.For the record data stored, the operations such as cutting, amendment, deletion can be carried out by storage administration interface.
6) wave shape playback interface
The sample values stored can be resolved to waveform and be presented in interface by wave shape playback interface.
A kind of data transfer device of digitalized electric energy quality monitoring terminal checkout gear, by terminal to be measured, in the device that digitlization oscillograph and standard source are formed, digitlization oscillograph connects terminal to be measured by communication terminal, standard source is connected with digitlization oscillograph by analog quantity terminal, standard source is used for digitlization oscillograph input voltage and input current analog signals, the electric current and voltage analog signal that digitlization oscillograph is used for standard source inputs is converted into sampling value message, and sampling value message is sent to terminal to be measured, the sampling value message that terminal to be measured sends for receiving digitlization oscillograph, it is characterized in that, comprise the following steps:
Data reception step, the analog signals data sent in order to standard source described in real-time reception;
Compression storing step, carries out Lossless Compression in order to the analog signals data that received by described receiving step by DEFLATE algorithm and stores;
Decompress(ion) interpolation procedure, in order to carry out numerical analysis by after the analog signal data decompress(ion) of compression by Lagrangian N interpolation algorithm;
Message switch process, in order to be converted into 9-1 and 9-2 message by interpolated data;
Data export step, export described terminal to be measured in order to conversion to be obtained 9-1 and 9-2 message.
As shown in Figure 2, digitlization oscillograph inside has memory device to the present embodiment, can store the original waveform data file of user-defined format.By long-range or panel operation, digitlization oscillograph can adopt circulation, the original waveform data file transform of specifying becomes IEC618509-1 or 9-2 message to send to digitalized electric energy quality monitoring terminal by optic fibre connector or Ethernet by the mode that once sends.After transmission sampled data, digitlization oscillograph will adopt the data 3 number of seconds certificate of MMS (Microsoft Media Server) Protocol reading terminals by optic fibre connector or Ethernet, by judging the data value error of input and output, determine the precision of terminal.
By digitlization oscillograph, the electric current and voltage analog quantity of standard source is converted into 9-1,9-2 packet sampling value, then is transferred to terminal to be measured, the precision that can network to terminal to be measured and Function detection, effectively reduce the cost exporting sampled value equipment simultaneously.
In addition to the implementation, the present invention can also have other execution modes.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection range of application claims.
Claims (8)
1. a digitalized electric energy quality monitoring terminal checkout gear, comprise terminal to be measured, digitlization oscillograph and standard source, described digitlization oscillograph connects described terminal to be measured by communication terminal, described standard source is connected with described digitlization oscillograph by analog quantity terminal, described standard source is used for described digitlization oscillograph input voltage and input current analog signals, the electric current and voltage analog signal that described digitlization oscillograph is used for described standard source to input is converted into sampling value message, and sampling value message is sent to described terminal to be measured, the sampling value message that described terminal to be measured sends for receiving described digitlization oscillograph, it is characterized in that, described digitlization oscillograph contains:
Data sink, the analog signals data sent in order to standard source described in real-time reception;
Compression storage device, carries out Lossless Compression in order to the analog signals data that received by described receiving system by DEFLATE algorithm and stores;
Decompress(ion) interpolating apparatus, in order to carry out numerical analysis by after the analog signal data decompress(ion) of compression by Lagrangian N interpolation algorithm;
Message conversion equipment, in order to be converted into 9-1 and 9-2 message by interpolated data;
Data output device, exports described terminal to be measured in order to conversion to be obtained 9-1 and 9-2 message.
2. a kind of digitalized electric energy quality monitoring terminal checkout gear according to claim 1, it is characterized in that, described digitlization oscillograph also comprises memory module and telemanagement, the electric current and voltage analog quantity sampling value message that described memory module transforms for preserving described digitlization oscillograph, and can export by described telemanagement the sampling value message preserved to terminal to be measured.
3. a kind of digitalized electric energy quality monitoring terminal checkout gear according to claim 1 and 2, it is characterized in that, the voltage and current parameter that described digitlization oscillograph can set according to described telemanagement simulates corresponding sampling value message, then is sent to terminal to be measured by described communication terminal.
4. a kind of digitalized electric energy quality monitoring terminal checkout gear according to claim 2, it is characterized in that, described telemanagement comprises data display interface, optimum configurations interface, start record interface, reading and saving sampling value message interface, storage administration interface and wave shape playback interface, described data display interface is for showing each parameter and the sampled value waveform of electric current and voltage analog quantity channel, described optimum configurations interface is for arranging each parameter and the memory module record rule of electric current and voltage, described startup records outside input is also recorded at interface sampled value for the pattern of manually booting, described sampling value message interface is for reading the record data stored, described storage administration interface is used for managing the data recorded in memory module, described wave shape playback interface is used for that the sampled value stored is resolved to waveform and now shows.
5. a kind of digitalized electric energy quality monitoring terminal checkout gear according to claim 1, is characterized in that, described communication terminal is optic fibre connector and Ethernet terminal.
6. a kind of digitalized electric energy quality monitoring terminal checkout gear according to claim 1, described Lagrangian N interpolation algorithm (x in a given k+1 data point
0, y
0) ..., (x
k, y
k), wherein x
jcorrespond to the position of independent variable, and y
jbe the corresponding value of described decompress(ion) interpolating apparatus inner function, the Lagrange interpolation polynomial obtained by Lagrange's interpolation formula is
wherein each l
jx () is Lagrangian fundamental polynomials (or claiming Interpolation-Radix-Function), l
jx the expression formula of () is
7. the data transfer device based on digitalized electric energy quality monitoring terminal checkout gear according to claim 1, by terminal to be measured, in the device that digitlization oscillograph and standard source are formed, described digitlization oscillograph connects described terminal to be measured by communication terminal, described standard source is connected with described digitlization oscillograph by analog quantity terminal, described standard source is used for described digitlization oscillograph input voltage and input current analog signals, the electric current and voltage analog signal that described digitlization oscillograph is used for described standard source to input is converted into sampling value message, and sampling value message is sent to described terminal to be measured, the sampling value message that described terminal to be measured sends for receiving described digitlization oscillograph, it is characterized in that, comprise the following steps:
Data reception step, the analog signals data sent in order to standard source described in real-time reception;
Compression storing step, carries out Lossless Compression in order to the analog signals data that received by described receiving step by DEFLATE algorithm and stores;
Decompress(ion) interpolation procedure, in order to carry out numerical analysis by after the analog signal data decompress(ion) of compression by Lagrangian N interpolation algorithm;
Message switch process, in order to be converted into 9-1 and 9-2 message by interpolated data;
Data export step, export described terminal to be measured in order to conversion to be obtained 9-1 and 9-2 message.
8. the data transfer device of a kind of digitalized electric energy quality monitoring terminal checkout gear according to claim 7, is characterized in that, described Lagrangian N interpolation algorithm (x in a given k+1 data point
0, y
0) ..., (x
k, y
k), wherein x
jcorrespond to the position of independent variable, and y
jbe the corresponding value of described decompress(ion) interpolating apparatus inner function, the Lagrange interpolation polynomial obtained by Lagrange's interpolation formula is
wherein each l
jx () is Lagrangian fundamental polynomials (or claiming Interpolation-Radix-Function), l
jx the expression formula of () is
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| CN110095743B (en) * | 2019-04-14 | 2024-03-29 | 广西电网有限责任公司南宁供电局 | Distribution network terminal wave recording performance test module and waveform fitting method thereof |
| CN110672969A (en) * | 2019-11-05 | 2020-01-10 | 国网黑龙江省电力有限公司电力科学研究院 | On-site line protection device field test system |
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