CN102065105B - Framing method of IEC (International Electrotechnical Commission) 61850-9-2 protocol data frame for digital substation - Google Patents
Framing method of IEC (International Electrotechnical Commission) 61850-9-2 protocol data frame for digital substation Download PDFInfo
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Abstract
The invention discloses a framing method of an IEC (International Electrotechnical Commission) 61850-9-2 protocol data frame for a digital substation, comprising the following steps of: (1) respectively and independently framing a Header of an APDU (Application Protocol Data Unit) data frame and (1-n) APDUs; (2) finding out the rule between an elongating parameter and an elongating factor in the APDU data frame; and (3) introducing a learning method among different APDUs in the same APDU data frame and a self-learning method among the APDU data frames with same structure. According to the invention, by adopting the principles of dividing and controlling, the Header of each APDU data frame and the (1-n) APDUs are respectively and independently processed; by introducing the self-learning method among the APDU data frames with the same APDU and the self-learning method among the APDU data frames with the same structure, the complexity of framing the IEC 61850-9-2 protocol data frame is reduced and the processing efficiency of the data can be increased.
Description
Technical field
The present invention relates to a kind of framing method of the IEC61850-9-2 protocol data frame for digital transformer substation.
Background technology
the IEC61850-9-2 protocol data frame is an important component part of digital transformer substation, it has built the particular communication service mapping function in substation communication network and system, yet because IEC61850-9-2 supports flexible configuration, application service data cell ASDU number in its each Application Protocol Data Unit APDU Frame, data cell number in system's unique identification svID length and data set DataSet all may be different, and what IEC61850-9-2 Application Protocol Data Unit APDU Frame used is the ASN.1 coding rule, therefore, the tissue of IEC61850-9-2 Application Protocol Data Unit APDU Frame is more complicated, configure the Frame that forms with complicated coding rule upper framework so flexibly, how to operate accurately and efficiently when separating frame and have much challenge.Also be in for the design of IEC61850-9-2 Application Protocol Data Unit APDU Frame at present and separate and the state of system not, and each R﹠D institution and technological development part are also thorough not to the understanding of the frame processing method of IEC61850-9-2 Application Protocol Data Unit APDU Frame, so, need to be resolved hurrily in the situation that strictly observe the frame processing method of the power industry standard integration IEC61850-9-2 of People's Republic of China (PRC) Application Protocol Data Unit APDU Frame.
Summary of the invention
The object of the present invention is to provide a kind of framing method that can reduce the framing complexity of IEC61850-9-2 protocol data frame and improve the IEC61850-9-2 protocol data frame that is used for digital transformer substation of data-handling efficiency.
The framing method of this IEC61850-9-2 protocol data frame for digital transformer substation provided by the invention comprises the steps:
(1) the head H eader that uses protocol Data Unit APDU Frame is set up object HEAD_APDU, first that use protocol Data Unit APDU Frame set up object ASDU92 to n application service data cell ASDU1～n, described object HEAD_APDU and object ASDU92 all are divided into managerial structure and framing data two parts, described managerial structure is stored value and the displacement of this territory in Application Protocol Data Unit APDU Frame in each territory in this object, managerial structure in described object HEAD_APDU and object ASDU92 and framing data are processed respectively individually,
(2) find out for the analog quantity sampled value protocol Data Unit savPdu, the application service data unit sequence Sequence of ASDU that determine whole Application Protocol Data Unit APDU Frame length and first to the rule between three elongated factors of data cell number of n three elongated parameters of application service data unit sequence Sequence ASDU1～n and application service data cell ASDU number, system's unique identification svID length and data set DataSet, determine the length of computational methods computing application protocol Data Unit APDU Frame;
(3) introduce with the self-learning method between the self-learning method between different application service data unit ASDU in Application Protocol Data Unit APDU Frame and isostructural Application Protocol Data Unit APDU Frame, after first application service data cell ASDU1 framing, second to n application service data cell ASDU2～n uses for reference the structure of described first application service data cell ASDU1, different data fields is inserted into relevant position in second to n application service data cell ASDU2～n each territory, use for reference the structure of this Application Protocol Data Unit APDU Frame that framing is good with the isostructural subsequent applications protocol Data Unit of the Application Protocol Data Unit APDU Frame APDU Frame that framing is good, the framing data of described object HEAD_APDU directly copy to the relevant position of this Application Protocol Data Unit APDU data frame header Header, framing in described object ASDU92 data based its first directly be inserted into first relevant position to n application service data cell ASDU1～n in this Application Protocol Data Unit APDU Frame to the displacement in n application service data cell ASDU1～n each territory.
Framing data described in described framing step (3) in object ASDU92 are first organized in this object, and property copies in this Application Protocol Data Unit APDU Frame first to the relevant position in n application service data cell ASDU1～n each territory again after its all framing data are all organized.
Solution frame method corresponding to described framing method comprises the steps:
(1) the head H eader that uses protocol Data Unit APDU Frame and first are resolved respectively individually to n application service data cell ASDU1～n, resolve its head H eader, set up object HEAD_APDU92, resolve its first to n application service data cell ASDU1～n, set up object ASDUn, described object HEAD_APDU92 comprises the variable nr_asdu for storage application service data cell ASDU number, the variable sz_asdu that is used for storage application service data cell ASDU length, be used for seeking first application service data cell ASDU1 at variable byte_sav_pdu and the variable byte_seqnc_asdu of Application Protocol Data Unit APDU Frame owner pointer, described object ASDUn comprises territory svid, subdomain smpCnt, confRev, smpSynch, territory DataSet,
(2) analytic method of its first application service data cell of second to n the application service data cell ASDU2～n self study ASDU1 in same Application Protocol Data Unit APDU Frame;
(3) adopt different parsing and clone method to using each different piece of protocol Data Unit APDU Frame, carry out direct copying for the part of fixed length, adopt displacement to add the method for insertion for elongated part.
Territory svid described in described solution frame step (1) comprises variable offset that address bit diverts from one use to another, variable number that record length is used and the character string string_array of system identity identification use, described subdomain smpCnt, confRev, smpSynch configure respectively sample rate, counting and sample-synchronous, and described territory DataSet comprises variable offset1 that address bit diverts from one use to another, variable bytes that record length is used and records the data that effective sampled data is used.The analytic method of the ASDU1 of first application service data cell described in described solution frame step (2) comprises the steps: that (1) is according to trying to achieve the owner pointer of first application service data cell ASDU1 in Application Protocol Data Unit APDU Frame for seeking first application service data cell ASDU1 at variable byte_sav_pdu and the variable byte_seqnc_asdu of Application Protocol Data Unit APDU Frame owner pointer in described object HEAD_APDU92; (2) find the solution the variable offset of addressing displacement of territory svid in object ASDUn and the variable number of record length, copy simultaneously the character string string_array that is used for system identity identification in the svid of this territory; (3) try to achieve according to the variable offset in described territory svid the content of directly being responsible for subdomain smpCnt, confRev and smpSynch after displacement; (4) try to achieve displacement and length according to the variable offset1 in described territory DataSet and variable bytes after, copy the efficiently sampling data of designated length in this territory.
The present invention is owing to having adopted the principle of dividing and rule, the head H eader that uses protocol Data Unit APDU Frame and first are processed respectively individually to n application service data cell ASDU1～n, and introduced with the self-learning method between the self-learning method between different application service data unit ASDU in Application Protocol Data Unit APDU Frame and isostructural Application Protocol Data Unit APDU Frame, reduced the framing complexity and the treatment effeciency that has improved data of IEC61850-9-2 protocol data frame.
Description of drawings
Fig. 1 is the structural representation of IEC61850-9-2 Application Protocol Data Unit APDU Frame in the present invention.
Fig. 2 is object LEN_CONTRL data structure diagram in the present invention.
Fig. 3 is the framing method schematic diagram of IEC61850-9-2 Application Protocol Data Unit APDU Frame in the present invention.
Fig. 4 resolves the grand and function of ASN.1 coding rule special use in the present invention.
Fig. 5 is the solution frame method schematic diagram of IEC61850-9-2 Application Protocol Data Unit APDU Frame in the present invention.
Embodiment
Fig. 1 is the structural representation of IEC61850-9-2 Application Protocol Data Unit APDU Frame in the present invention, as can be seen from Figure 1, the length of whole Application Protocol Data Unit APDU Frame depends on analog quantity sampled value protocol Data Unit savPdu, application service data unit sequence Sequence of ASDU and first is to n these three elongated parameters of application service data unit sequence Sequence ASDU1～n, and these three elongated parameter-dependents are in application service data cell ASDU number, these three elongated factors of the number of data units of system's unique identification svID length and data set DataSet, in order to find out elongated parameter and the elongated factor rule between these two, the spy has created object LEN_CONTRL, as shown in Figure 2.
Fig. 2 is object LEN_CONTRL data structure diagram in the present invention, as shown in the figure, first in object LEN_CONTRL is is_modified, whether it is used to refer to the elongated factor and changes, if the elongated factor is changed, recomputate the value of elongated parameter, simultaneously, in order to realize the encapsulation of object LEN_CONTRL, the elongated factor and elongated parameter all are included in object LEN_CONTRL.
Fig. 3 is the framing method schematic diagram of IEC61850-9-2 Application Protocol Data Unit APDU Frame in the present invention, as shown in the APDU_FRAME on the left side in figure (APDU_FRAME is the APDU Frame that can directly send), the framing method of Application Protocol Data Unit APDU Frame has adopted the method for dividing and rule, and its head H eader and first are processed respectively individually to n application service data cell ASDU1 ~ n.as scheme as shown in the right, head H eader for APDU_FRAME sets up object HEAD_APDU, set up object ASDU92 for first in APDU_FRAME to n application service data cell ASDU1～n, object HEAD_APDU and ASDU92 are divided into managerial structure and two parts of framing data, wherein managerial structure is the displacement in Application Protocol Data Unit APDU frame (according to this displacement energy data in this territory of addressing easily) for the value in storage this object each territory and this territory, and the framing data are can directly copy to valid data in Application Protocol Data Unit APDU Frame by what the managerial structure data were calculated.
When framing method begins, at first check whether the is_modified in object LEN_CONTRL is TRUE, if be TRUE, illustrate that the elongated factor changes, clear flag and recomputate elongated parameter, object HEAD_APDU and ASDU92 will recomputate value and the displacement in each territory simultaneously, and this change because of the elongated factor causes that recomputating of above-mentioned each object is referred to as " frame repeatedly changes ", this computing cost larger (in most of situation, the elongated factor is all changeless); if the is_modified in object LEN_CONTRL is FALSE, illustrate that the elongated factor do not change, calculation task in the case is very little, at first the framing data of object HEAD_APDU directly copy to the relevant position of the head H eader of this Application Protocol Data Unit APDU Frame, framing in object ASDU92 data based its first directly be inserted into first relevant position to n application service data cell ASDU1～n in this Application Protocol Data Unit APDU Frame to the displacement in n application service data cell ASDU1～n each territory, framing data in object ASDU92 are first organized in this object, property copies in this Application Protocol Data Unit APDU Frame first to the relevant position in n application service data cell ASDU1～n each territory again after its all framing data are all organized, above-mentioned all operational motions are as shown in the arrow in figure, other application service data cell except first application service data cell ASDU1, i.e. second to n application service data cell ASDU2～n, just can use for reference easily structure and the partial data (as the unique identification svID of system) of first application service data cell ASDU1, namely with the self-learning method of different application service data unit ASDU in Application Protocol Data Unit APDU.
Fig. 4 resolves the grand and function of ASN.1 coding rule special use in the present invention, as shown in the figure, in order to solve the difficulty of ASN.1 decoding, at first define two of GET_BYTES () and Convert () grand, wherein grand GET_BYTES () asks the length of whole encoded byte according to first byte of ASN.1 coding, and grand Convert () finds the solution actual length value according to the pointer of first byte of the ASN.1 coding of input.
Fig. 5 is the solution frame method schematic diagram of IEC61850-9-2 Application Protocol Data Unit APDU Frame in the present invention, as shown in the figure, for the convenient head H eader that resolves Application Protocol Data Unit APDU Frame, set up object HEAD_APDU92, this object comprises the variable nr_asdu for storage application service data cell ASDU number, the variable sz_asdu that is used for storage application service data cell ASDU length, be used for seeking first application service data cell ASDU1 at variable byte_sav_pdu and the variable byte_seqnc_asdu of Application Protocol Data Unit APDU Frame owner pointer, described object ASDUn comprises territory svid, subdomain smpCnt, confRev, smpSynch, territory DataSet, described territory svid comprises the variable offset that address bit is diverted from one use to another, the character string string_array of the variable number that record length is used and system identity identification use, described subdomain smpCnt, confRev, smpSynch is respectively used to configure sample rate, counting and sample-synchronous, described territory DataSet comprises the variable offset1 that address bit is diverted from one use to another, the variable bytes that record length is used and record the data that effective sampled data is used.The parsing of all application service data cell ASDU all is based upon on object ASDUn, and as shown in the figure, the structure of object ASDUn meets to insert and copies with direct copying very much.The analytic method of first application service data cell ASDU1 is as described below: at first, try to achieve the owner pointer of first application service data cell ASDU1 in Application Protocol Data Unit APDU Frame according to being used for seeking first application service data cell ASDU1 in described object HEAD_APDU92 at variable byte_sav_pdu and the variable byte_seqnc_asdu of Application Protocol Data Unit APDU Frame owner pointer; Secondly, find the solution the variable offset of addressing displacement of territory svid in object ASDUn and the variable number of record length, copy simultaneously the character string string_array that is used for system identity identification in the svid of this territory; Then, try to achieve according to the variable offset in described territory svid the content of directly being responsible for subdomain smpCnt, confRev and smpSynch after displacement; At last, after trying to achieve displacement and length according to the variable offset1 in described territory DataSet and variable bytes, copy the efficiently sampling data of designated length in this territory.
Finding the solution of ASDU2～n is just more convenient, because it can directly use for reference the analytic method of above-mentioned first application service data cell ASDU1, at first, sequentially find the solution the pointer of this application service data unit ASDU in APDU_FRAME according to the sz_asdu in object HEAD_APDU92 and p_asdu; Then, that need to resolve only has fixing subdomain smpCnt, confRev, smpSynch and territory DataSet, because these 4 parts have correct displacement (finding the solution) in first application service data cell ASDU1, required work is just inserted and is copied.
Claims (5)
1. a framing method that is used for the IEC61850-9-2 protocol data frame of digital transformer substation, is characterized in that this framing method comprises the steps:
(1) head (Header) of using protocol Data Unit (APDU) Frame is set up object HEAD_APDU, to use protocol Data Unit (APDU) Frame first (ASDU1～n) sets up object ASDU92 to n application service data cell, described object HEAD_APDU and object ASDU92 all are divided into managerial structure and framing data two parts, described managerial structure is stored value and the displacement of this territory in Application Protocol Data Unit (APDU) Frame in each territory in this object, managerial structure in described object HEAD_APDU and object ASDU92 and framing data are processed respectively individually,
(2) find out for the analog quantity sampled value protocol Data Unit (savPdu) of determining whole Application Protocol Data Unit (APDU) Frame length, application service data unit sequence (Sequence of ASDU) and first are to n application service data unit sequence (three elongated parameters of Sequence ASDU1～n) and application service data cell (ASDU) number, rule between three elongated factors of the data cell number of system's unique identification (svID) length and data set (DataSet), determine the length of computational methods computing application protocol Data Unit (APDU) Frame,
(3) introduce self-learning method between the self-learning method between different application service data unit (ASDU) in same Application Protocol Data Unit (APDU) Frame and isostructural Application Protocol Data Unit (APDU) Frame, after first application service data cell (ASDU1) framing, second to n application service data cell (ASDU2～n) use for reference structure of described first application service data cell (ASDU1), different data fields is inserted into second to n the application service data cell (relevant position in ASDU2～n) each territory, use for reference the structure of this Application Protocol Data Unit (APDU) Frame that framing is good with Application Protocol Data Unit (APDU) the isostructural subsequent applications protocol Data Unit of Frame (APDU) Frame that framing is good, the framing data of described object HEAD_APDU directly copy to the relevant position of this Application Protocol Data Unit (APDU) data frame header (Header), framing in described object ASDU92 data based its first (displacement in each territory of ASDU1～n) directly is inserted in this Application Protocol Data Unit (APDU) Frame first to n the application service data cell (relevant position of ASDU1～n) to n application service data cell.
2. the framing method of the IEC61850-9-2 protocol data frame for digital transformer substation according to claim 1, it is characterized in that the framing data in object ASDU92 described in described framing step (3) first organize in this object, property copies in this Application Protocol Data Unit (APDU) Frame first to n the application service data cell (ASDU1～n) relevant position in each territory again after its all framing data are all organized.
3. the solution frame method corresponding to the described framing method of claim 1, comprise the steps:
(1) to the head (Header) of using protocol Data Unit (APDU) Frame and first is to n application service data cell (ASDU1～n) resolve individually respectively, resolve its head (Header), set up object HEAD_APDU92, resolve its first to n application service data cell (ASDU1～n), set up object ASDUn, described object HEAD_APDU92 comprises for storage application service data cell
(ASDU) the variable nr_asdu of number, be used for storage application service data cell
(ASDU) the variable sz_asdu of length, be used for to seek first application service data cell (ASDU1) at variable byte_sav_pdu and the variable byte_seqnc_asdu of Application Protocol Data Unit (APDU) Frame owner pointer, described object ASDUn comprises territory svid, subdomain smpCnt, confRev, smpSynch, territory DataSet;
(2) (the analytic method of its first application service data cell (ASDU1) of self study of ASDU2～n) of second to n application service data cell in same Application Protocol Data Unit (APDU) Frame;
(3) adopt different parsing and clone method to using each different piece of protocol Data Unit (APDU) Frame, carry out direct copying for the part of fixed length, adopt displacement to add the method for insertion for elongated part.
4. solution frame method according to claim 3, it is characterized in that variable offset that territory svid described in described solution frame step (1) comprises address bit and divert from one use to another, variable number that record length is used and the character string (string_array) of system identity identification use, described subdomain smpCnt, confRev, smpSynch configure respectively sample rate, counting and sample-synchronous, and described territory DataSet comprises variable offset1 that address bit diverts from one use to another, variable bytes that record length is used and records the data that effective sampled data is used.
5. solution frame method according to claim 3, is characterized in that the analytic method of first application service data cell (ASDU1) described in described solution frame step (2) comprises the steps:
(1) try to achieve the owner pointer of first application service data cell (ASDU1) in Application Protocol Data Unit (APDU) Frame according to being used for seeking first application service data cell (ASDU1) in described object HEAD_APDU92 at variable byte_sav_pdu and the variable byte_seqnc_asdu of Application Protocol Data Unit (APDU) Frame owner pointer;
(2) find the solution the variable offset of addressing displacement of territory svid in object ASDUn and the variable number of record length, copy simultaneously the character string (string_array) that is used for system identity identification in the svid of this territory;
(3) try to achieve according to the variable offset in described territory svid the content of directly being responsible for subdomain smpCnt, confRev and smpSynch after displacement;
(4) try to achieve displacement and length according to the variable offset1 in described territory DataSet and variable bytes after, copy the efficiently sampling data of designated length in this territory.
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| 《基于IEC61850的数字化变电站通信研究》;刘从洪;《中国优秀硕士学位论文全文数据库》;CNKI;20090131;全文 * |
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