CN106877506B - A kind of transport protocol compression method of the out-of-limit monitoring data of distribution network voltage - Google Patents
A kind of transport protocol compression method of the out-of-limit monitoring data of distribution network voltage Download PDFInfo
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- CN106877506B CN106877506B CN201710178648.1A CN201710178648A CN106877506B CN 106877506 B CN106877506 B CN 106877506B CN 201710178648 A CN201710178648 A CN 201710178648A CN 106877506 B CN106877506 B CN 106877506B
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Abstract
本发明属于配电网监测领域，提供一种配电网电压越限监测数据的传输协议压缩方法，应用于配电网电压越限监测数据的高效传输，该方法包括以下步骤：（1）根据配电网电压越限数据精度要求，以额定电压为基准，按百分比对配电网电压监测数据进行等间隔编码，间隔步长为1%；（2）定义DS为“时间区段电压越限点数字节”，用6个二进制字节DS1~DS6的每2个字节的高15位的3位组标记时间区段电压越限点数；等等。本发明配电网电压越限监测数据的传输协议压缩方法，压缩效果明显，能够显著减少通信资费和通信网络的负担。The invention belongs to the field of distribution network monitoring, and provides a transmission protocol compression method for distribution network voltage over-limit monitoring data, which is applied to the efficient transmission of distribution network voltage over-limit monitoring data. The method includes the following steps: (1) According to According to the data accuracy requirements of distribution network voltage exceeding the limit, based on the rated voltage, the distribution network voltage monitoring data is coded at equal intervals by percentage, and the interval step is 1%; Point number byte", mark the number of voltage crossing points in the time segment with the high 15-bit 3-bit group of each 2 bytes of 6 binary bytes DS1~DS6; and so on. The method for compressing the transmission protocol of the monitoring data of the voltage exceeding the limit of the distribution network of the present invention has obvious compression effect, and can significantly reduce the communication tariff and the burden of the communication network.
Description
Technical field
The invention belongs to power distribution networks to monitor field, and in particular to a kind of transport protocol of the out-of-limit monitoring data of distribution network voltage
Compression method, the high efficiency of transmission applied to the out-of-limit monitoring data of distribution network voltage.
Background technique
The out-of-limit the safe and economic operation for directly affecting all kinds of electrical equipments of distribution network voltage, thus it is out-of-limit to distribution network voltage
It is monitored very necessary.Common voltage out-of-limit monitoring data are using equal interval sampling and with double-byte representation voltage value, again
Because power distribution network covering surface is extremely wide, the monitoring that needs to acquire points are numerous, and the data volume for needing to transmit is big, cause to occupy compared with
Big network bandwidth and high post and telecommunication tariff.
Summary of the invention
The purpose of the present invention is to overcome the above deficiencies in the prior art, provides a kind of distribution network voltage and gets over
The transport protocol compression method of monitoring data is limited, compression effectiveness is obvious, can substantially reduce the negative of post and telecommunication tariff and communication network
Load.
The purpose of the present invention is what is be achieved through the following technical solutions.
A kind of transport protocol compression method of the out-of-limit monitoring data of distribution network voltage, comprising the following steps:
(1) voltage out-of-limit data encoding
According to the out-of-limit data precision requirement of distribution network voltage, on the basis of voltage rating, precentagewise is to distribution network voltage
Monitoring data are encoded at equal intervals, interval steps 1%；Defining DP is " voltage percentage Value Data ", considers distribution network voltage
The absolute value of out-of-limit range is not more than 30%, totally 61 percentage values, use low 6 of 1 binary system byte with signed two into
Number expression processed, i.e. d7d6111111~d7d6100001 respectively indicate -31% to -1%, d7d6000001~d7d6011111 respectively indicate+
1% to+31%, d7d6000000 and d7d6100000 two codings indicate 0%；
The distribution network voltage out-of-limit monitoring data sampling period is 1min, and 60 monitoring data, 60 point datas are pressed per hour
Time sequencing is divided into 15 time section S1 ~ S15, and each time section is containing 4 voltage percentage Value Datas and remembers in chronological order
For SX(DP00), SX (DP01), SX (DP10), SX (DP11), out-of-limit voltage data is only recorded, non-out-of-limit data are rejected, to have
Effect reduces transmission data, so, if corresponding time point voltage is not out-of-limit, which will not occur；It is fixed
" the voltage percentage Value Data " of adopted voltage out-of-limit point is " voltage out-of-limit percentage Value Data ", the voltage out-of-limit point of each time section
Time sequencing high two d of " voltage out-of-limit percentage Value Data "7d6Label；For example, the 2nd voltage of time section 5 is got over
It limits, then S5 (DP01)=01xxxxxx, and so on；
So far the voltage out-of-limit data encoding of all more point of accumulation in power distribution network is obtained；
(2) time section voltage out-of-limit points byte code
Defining DS is " time section voltage out-of-limit points byte ", with every 2 bytes of 6 binary system byte DS1 ~ DS6
High 15 3 hytes label time section voltage out-of-limit points, i.e. DS1DS2(d15d14d13d12d11d10d9d8d7d6d5d4d3d2d1d0) d15d14d13Remember voltage out-of-limit points, the d of S1 time section12d11d10The voltage out-of-limit points of note S2 time section,
d9d8d7Remember voltage out-of-limit points, the d of S3 time section6d5d4Remember voltage out-of-limit points, the d of S4 time section3d2d1Remember the S5 time
The voltage out-of-limit points of section, d0Permanent position is 0, DS3DS4, DS5DS6 and so on；
(3) it carries out 1 frame per hour using following data frame to transmit: 7EH E7H 7EH X1 X2 X3 X4 X5 X6 X7
X8 DS1 DS2 DS3 DS4 DS5 DS6 voltage out-of-limit percentage value data field XOR SUM 0DH, wherein 7EH E7H 7EH
For frame head, 3 bytes；X1 is receiving end address, 1 byte；X2 X3 is transmitting terminal address, 2 bytes； X4 X5 X6 X7
For temporal information, 4 bytes, using 8421 binary-coded decimals respectively indicate year, month, day, when, be only with last two decimal data tables
Show, such as: when 28 days 14 October in 2017, being expressed as 17H 10H 28H 14H；X8 is data length, 1 byte；DS1 DS2
DS3 DS4 DS5 DS6 meaning is as described in step (2), 6 bytes；Voltage out-of-limit percentage value data field, which only records, gets over point of accumulation
" voltage out-of-limit percentage Value Data ", if voltage out-of-limit points are N in 1 hour, voltage out-of-limit percentage value data field is total to N number of word
Section；XOR be from X1 to XOR before all bytes exclusive or value, 1 byte；SUM be from X1 to XOR before all bytes cumulative and
Low byte, 1 byte；ODH is postamble, 1 byte.
Compression effectiveness of the invention is described below in detail.
The data frame that the present invention uses: 7EH E7H 7EH X1 X2 X3 X4 X5 X6 X7 X8 DS1 DS2 DS3
DS4 DS5 DS6 voltage out-of-limit percentage value data field XOR SUM 0DH, X8 are data length byte, remember that its numerical value is M, then
Data frame shares 14+M byte per hour.
(A) before uncompressed, voltage value uses double-byte representation, and presses sampling instant journal each point voltage value, M=2*
60=120 bytes, then data frame shares the byte of 14+120=134 per hour；
(B) after compressing, if voltage out-of-limit points are N in 1 hour, voltage out-of-limit percentage value data field is total to N number of byte, and M=
6+N byte, then data frame shares 14+6+N byte, data compression ratio per hour；
The corresponding data compression ratio T of the out-of-limit points N of different voltages is as shown in table 1.The out-of-limit points N of calculation result table prescribed voltage
Fewer, data compression ratio T is smaller, and compression effectiveness is better.
1 different voltages of table get over the corresponding data compression ratio T of point of accumulation N
To sum up, a kind of transport protocol compression method of the out-of-limit monitoring data of distribution network voltage of the present invention, compression effectiveness is obvious,
The burden of post and telecommunication tariff and communication network can be substantially reduced.
Specific embodiment
With specific example, present invention is further described in detail below.
Assuming that carrying out the out-of-limit monitoring of distribution network voltage, 60 points of monitoring numbers to certain 380V power distribution network at 1 day 12 March in 2017
According to as shown in table 2.
Certain the out-of-limit monitoring data of 380V distribution network voltage of table 2
According to the rules, 380V distribution network voltage deviation allowed band is ± 7%, and above-mentioned 60 monitoring data share 18 points of electricity
Out-of-limit data encoding is pressed to be respectively as follows:
S1 (DP01)=01101010, S2 (DP01)=01101000, S2 (DP10)=10101000,
S4 (DP11)=11101001, S5 (DP00)=00101001, S5 (DP01)=01101010,
S6 (DP01)=01101010, S7 (DP01)=01101000, S7 (DP10)=10101000,
S9 (DP11)=11101001, S10 (DP00)=00101001, S10 (DP01)=01101010,
S11 (DP01)=01001010, S12 (DP01)=01001000, S12 (DP10)=10001000,
S14 (DP11)=11001001, S15 (DP00)=00001001, S15 (DP01)=01001010；
And obtain time section voltage out-of-limit points byte code:
DS1DS2=0010100000010100,
DS3DS4=0010100000010100,
DS5DS6=0010100000010100；
Numerical value M=6+18=24 of data length byte；Assuming that receiving end address is 01H, transmitting terminal address is 00H 01H,
Then above-mentioned 60 monitoring data are indicated with the format of data frame are as follows: 7EH E7H 7EH 01H 00H 01H 17H 03H 01H
12H 18H 28H 14H 28H 14H 28H 14H 6AH 68H A8H E9H 29H 6AH 6AH 68H A8H E9H 29H
6AH 4AH 48H 88H C9H 09H 4AH 23H 1DH 0DH。
In conclusion a kind of transport protocol compression method of the out-of-limit monitoring data of distribution network voltage of the present invention, in this implementation
In example, transmitting data frame totally 38 byte per hour, compression ratio 28.4%.
Above embodiments are used for illustrative purposes only, rather than limitation of the present invention, the technology people in relation to technical field
Member, the various transformation or modification made without departing from the spirit and scope of the present invention also should be regarded as in guarantor of the invention
Within the scope of shield, limited by each claim.
Claims (2)
1. a kind of transport protocol compression method of the out-of-limit monitoring data of distribution network voltage, it is characterised in that this method includes following step
It is rapid:
(1) voltage out-of-limit data encoding
According to the out-of-limit data precision requirement of distribution network voltage, on the basis of voltage rating, precentagewise monitors distribution network voltage
Data are encoded at equal intervals, interval steps 1%；Defining DP is " voltage percentage Value Data ", using 1 binary system byte
Low 6 with signed binary number representation, i.e. d7d6111111~d7d6100001 respectively indicate -31% to -1%, d7d6000001
~d7d6011111 respectively indicates+1% to+31%, d7d6000000 and d7d6100000 two codings indicate 0%；
The distribution network voltage out-of-limit monitoring data sampling period is 1min, per hour 60 monitoring data, temporally by 60 point datas
Sequence is divided into 15 time section S1 ~ S15, and each time section is containing 4 voltage percentage Value Datas and is denoted as SX in chronological order
(DP00), SX (DP01), SX (DP10), SX (DP11) only record out-of-limit voltage data, reject non-out-of-limit data；Define voltage
" the voltage percentage Value Data " of more point of accumulation is " voltage out-of-limit percentage Value Data ", the time of the voltage out-of-limit point of each time section
Sequence high two d of " voltage out-of-limit percentage Value Data "7d6Label；
So far the voltage out-of-limit data encoding of all more point of accumulation in power distribution network is obtained；
(2) time section voltage out-of-limit points byte code
Defining DS is " time section voltage out-of-limit points byte ", with the height of every 2 bytes of 6 binary system byte DS1 ~ DS6
15 3 hytes label time section voltage out-of-limit points, i.e. DS1DS2(d15d14d13d12d11d10d9d8d7d6d5d4d3d2d1d0)
D15d14d13Remember voltage out-of-limit points, the d of S1 time section12d11d10Remember voltage out-of-limit points, the d of S2 time section9d8d7Note
The voltage out-of-limit points of S3 time section, d6d5d4Remember voltage out-of-limit points, the d of S4 time section3d2d1Remember S5 time section
Voltage out-of-limit points, d0Permanent position is 0, DS3DS4, DS5DS6 and so on；
(3) it carries out 1 frame per hour using following data frame to transmit: 7EH E7H 7EH X1 X2 X3 X4 X5 X6 X7 X8
DS1 DS2 DS3 DS4 DS5 DS6 voltage out-of-limit percentage value data field XOR SUM 0DH, wherein 7EH E7H 7EH is frame
Head, 3 bytes；X1 is receiving end address, 1 byte；X2 X3 is transmitting terminal address, 2 bytes；When X4 X5 X6 X7 is
Between information, 4 bytes；X8 is data length, 1 byte；DS1 DS2 DS3 DS4 DS5 DS6 meaning such as institute in step (2)
It states, 6 bytes；Voltage out-of-limit percentage value data field only records " the voltage out-of-limit percentage Value Data " of more point of accumulation, if electric in 1 hour
Pressing out-of-limit points is N, then voltage out-of-limit percentage value data field is total to N number of byte；XOR be from X1 to XOR before all bytes exclusive or
Value, 1 byte；SUM be from X1 to XOR before all bytes cumulative sum low byte, 1 byte；ODH is postamble, 1 word
Section.
2. the transport protocol compression method of the out-of-limit monitoring data of distribution network voltage according to claim 1, it is characterised in that:
X4 X5 X6 X7 be temporal information, 4 bytes, using 8421 binary-coded decimals respectively indicate year, month, day, when, be only with end two
Decimal data indicates.
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| CN102427369A (en) * | 2011-10-19 | 2012-04-25 | 广东电网公司电力科学研究院 | Real-time holographic lossless compression method for productive time sequence data |
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| CN102427369A (en) * | 2011-10-19 | 2012-04-25 | 广东电网公司电力科学研究院 | Real-time holographic lossless compression method for productive time sequence data |
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| 基于压缩感知的电能质量扰动信号分析;张烨等;《大连工业大学学报》;20160731;第35卷(第4期);299-303 |
| 数据压缩技术在电力系统通信中的应用;苗世洪等;《电力自动化设备》;19990630;第19卷(第3期);32-33 |
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