CN111489077A - Reliability assessment method for power communication system - Google Patents
Reliability assessment method for power communication system Download PDFInfo
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Abstract
The invention discloses a reliability evaluation method for an electric power communication system, which comprises the following steps: step A: determining an evaluation target of the power communication network, wherein the evaluation target comprises network conditions, node equipment, a communication machine room environment and a transmission medium, and the step B comprises the following steps: constructing a hierarchical structure index system of an evaluation model, conceptualizing the complex problem, and performing a step C: establishing an index weight model of an evaluation model, comparing each index of the same layer with each index of the previous layer pairwise to construct an index judgment matrix, and calculating the maximum characteristic of the index judgment matrix and a corresponding standardized characteristic vector, namely the weight value of the index; the invention has the beneficial effects that: the reliability parameters of the electric power communication system acquired by the background are more comprehensive and reliable, each parameter is judged, when the condition is unqualified, a warning signal is generated and fed back to the background, all the reliability parameters of the electric power communication system are collected and accumulated, and judgment and classification are performed according to the safety reliability evaluation value of the electric power communication network.
Description
Technical Field
The invention relates to the field of electric power communication, in particular to a reliability evaluation method for an electric power communication system, and belongs to the technical field of electric power communication.
Background
The electric power communication is a large-scale complex special communication network with a multi-technology system and a multi-layer network structure, the network structure is complex, transmitted information types are bestowed, the practicability requirement is strong, the network distribution range is wide, the distances among nodes are far and near, many stations are unattended, along with the increasing large scale and the gradual complex structure of the electric power communication, the electric power communication network has to bear larger potential risks while supporting the safe and stable operation of the electric power network better, therefore, quantitative means and systems for evaluating the safety and reliability of the electric power communication network are urgently needed to be established, the electric power communication network is perfected through deletion and optimization, and the safety and reliability of the electric power communication is improved.
The existing power communication system evaluation method lacks an effective safety and reliability evaluation method and quantitative analysis, is difficult to evaluate the operation condition of the communication system more objectively and truly, and cannot evaluate the grade according to parameter indexes of all aspects.
Disclosure of Invention
The technical problem to be solved by the invention is as follows:
(1) how to solve the problem of comprehensively obtaining various parameter indexes when the power communication system runs;
(2) how to judge and process various parameter indexes of the electric power communication system;
(3) how to evaluate the reliability of the whole power communication system according to various parameter indexes.
The purpose of the invention can be realized by the following technical scheme: a reliability evaluation method for a power communication system comprises the following steps:
step A: determining an evaluation target of the power communication network, wherein the evaluation target comprises network conditions, node equipment, a communication machine room environment and a transmission medium;
and B: constructing a hierarchical structure index system of an evaluation model, and conceptualizing a complex problem;
and C: establishing an index weight model of an evaluation model, comparing each index of the same layer with each index of the previous layer pairwise to construct an index judgment matrix, and calculating the maximum characteristic of the index judgment matrix and a corresponding standardized characteristic vector, namely the weight value of the index;
step D: collecting data of the power communication network, wherein the data comprises statistical data of operation and maintenance of a power communication department and fault reports;
step E: index indexing of the power communication network, which comprises carrying out non-dimensionalization processing on the collected data, namely index indexing;
step F: calculating an evaluation target value of the power communication network, and calculating the safety and reliability of each indexed index and the index weight value by using a calculation method of an evaluation model to obtain a final evaluation target value, and expressing the final evaluation target value in a percentile score form;
step G: according to the evaluation target value and a preset standard value, carrying out grade evaluation on the reliability of the power communication;
wherein the calculating step of calculating the evaluation target value of the power communication network comprises:
1) the network condition security evaluation formula is expressed as:
U1＝∑ω1mh×U1∞h；
in the formula of U1∞hExpressed as a network risk value, ∑ ω1mhCarrying out forward processing on the risk value;
2) the node equipment reliability evaluation formula is expressed as:
U2＝∑ω21h×(1-U21h),(h＝1,2,…,9)；
wherein, when h is 1, U211Representing the failure rate of the optical equipment, when h is 2, U212Representing the failure rate of the access equipment, when h is 3, U213Representing the failure rate of the communication power supply, when h is 4, U214Representing the failure rate of the synchronous clock, when h is 5, U215Representing the failure rate of the switching system, when h is 6, U216Representing the failure rate of the network equipment, when h is 7, U217Representing the failure rate of the wiring system, when h is 8, U218Representing the failure rate of the carrier system, when h is 9, U219Representing the failure rate of the microwave system, since the contribution of the failure rate of the equipment to the safety reliability is reversed, by the formula ∑ ω21hCarrying out forward processing;
3) the environment formula of the communication machine room is expressed as follows:
U3＝∑ω31h×U31h,(h＝1,2,…,5)；
wherein when h is 1, U311Representing the rate of unqualified temperature in the machine room, when h is 2, U is312Representing the humidity unqualified rate of the machine room, when h is 3, U is313Representing the unqualified rate of the cleanliness of the machine room, and when h is 4, U is added314Representing the unqualified lightning grounding rate of the machine room, and when h is 5, U is315Representing the rate of unqualified fire prevention and theft prevention in the machine room through a formula ∑ omega31hCarrying out forward processing;
4) the transmission medium reliability equation is expressed as:
U4＝ω321×(1-U321)+ω322×U322；
in the formula of U321Representing the cable defect rate, U322Representing the type of cable, passing through ω321、ω322The data is processed in a forward mode, and the defect rate of the optical cable is expressed as
5) Preset network conditional Security Standard Mark
Preset node device reliability criteria flag
Preset communication room environment standard mark
Preset transport medium standard mark
Judging and processing the network condition security, the node equipment reliability, the communication machine room environment and the transmission medium reliability respectively, wherein the judging and processing steps are as follows;
when in use
Judging as a network condition primary index;
when in use
Judging the secondary index of the network condition, and generating a network condition warning signal;
when in use
Judging as a node equipment primary index;
when in use
Judging as a node equipment secondary index, and generating a node equipment warning signal;
when in use
Judging as a first-level index of the environment of the communication machine room;
when in use
Judging the environment secondary index of the communication machine room, and generating an environment warning signal of the communication machine room;
when in use
Determining a first-level index of a transmission medium;
when in use
Judging as a transmission medium secondary index, and generating a transmission medium warning signal;
6) the safety and reliability assessment formula of the power communication network is represented as follows:
U＝ω1×U1+ω2×U2+ω3×U3+ω4×U4；
in the formula of U1Indicates the network condition, U2Representing node devices, U3Represents an environmental factor, U4Representing the reliability of the transmission medium, ω1、ω2、ω3、ω4Are respectively U1、U2、U3、U4The weight value of (2).
Further, the method comprises the following steps: the hierarchical index system of the evaluation model is divided into a target layer, an index layer and an index basis layer, wherein the target layer is the highest layer in the index system structure, the index layer is the middle layer in the index system structure, and the index basis layer is the lowest layer in the index system structure.
Further, the method comprises the following steps: the target layer comprises four primary indexes which are respectively network conditions, node equipment, environmental factors and transmission media.
Further, the method comprises the following steps: the network conditions mainly include the survivability, the survivability and the real-time performance of the network, the scale coverage of key equipment and services and the surplus condition of network resources, the network conditions are divided into network anti-risk indexes, service anti-risk indexes and network resource surplus indexes, the node equipment mainly reflects the influence of network elements on the safety and reliability, the node equipment comprises the fault rate, the redundancy and the communication power redundancy of each equipment, the power-saving equipment indexes are divided into equipment reliability indexes, equipment redundancy indexes and communication power redundancy indexes, the environmental factors mainly aim at the environment where the network is located, and the environmental factor indexes are divided into communication machine room environment indexes, transmission medium reliability indexes and site geographical environment indexes.
The index judging matrix is an improvement on a relative comparison method and also belongs to an experience scoring method, all indexes are listed to form an N × N square matrix, then each index is compared pairwise and scored, and finally the scores of each index are summed and subjected to normalization processing.
Further, the method comprises the following steps: the non-dimensionalization means that a part or all of a unit of an equation relating to a physical quantity is removed by a suitable variable substitution for the purpose of simplifying experiments or calculations.
Further, the method comprises the following steps: the weight value of the index refers to the quantitative value of the value of each investigation index of a tested object in the whole, the relatively important degree and the occupied proportion.
Further, the method comprises the following steps: the step of evaluating the reliability level of the power communication in the step G includes:
s01: acquiring a safety reliability evaluation value of the power communication network;
s02: judging according to the safety reliability evaluation value of the power communication network and a preset standard value:
when the safety reliability evaluation value of the power communication network is equal to a preset standard value, judging that the power communication network is in a qualified state;
when the safety reliability evaluation value of the power communication network is less than a preset standard value, judging the power communication network to be in a defect state;
when the safety reliability evaluation value of the power communication network is larger than a preset standard value, the power communication network is judged to be in an ideal state;
and when the (preset standard value-electric power communication network safety reliability assessment value) is 0, determining that the electric power communication network safety reliability assessment value is in a paralyzed state.
Compared with the prior art, the invention has the beneficial effects that:
1. the method comprises the steps of respectively obtaining network condition safety parameters, node equipment reliability parameters, communication machine room environment parameters and transmission medium reliability parameters, wherein the node equipment reliability parameters are determined according to specific objects, specifically can be optical equipment operation normal indexes, communication power supply normal indexes, synchronous clock operation normal indexes, switching system operation normal indexes, network equipment operation normal indexes, wiring system operation normal indexes, carrier system operation normal indexes and microwave system operation normal indexes, the communication machine room environment parameters are determined according to the specific objects, specifically can be machine room temperature standard reaching rates, machine room lightning protection grounding standard reaching rates and machine room fire and theft prevention standard reaching rates, and the reliability parameters of the electric power communication system obtained by a background are more comprehensive and reliable.
2. When the network condition security parameter is greater than or equal to the corresponding preset value, the network condition primary index is judged to represent that the network condition is in a reliable state at present, when the network condition safety parameter is less than the corresponding preset value, the network condition secondary index is judged to represent that the network condition is in an unreliable state at present, a network condition warning signal is generated and sent to a background, when the reliability parameter of the node equipment is larger than or equal to the corresponding preset value, the node equipment is judged as a primary index, which indicates that the power-saving equipment is in a reliable state currently, when the reliability parameter of the node equipment is smaller than the corresponding preset value, the node equipment is judged to be a secondary index of the node equipment, the power-saving equipment is represented to be in an unreliable state, a node equipment warning signal is generated and sent to a background, and by analogy, each parameter is judged, and when the condition is unqualified, a warning signal is generated and fed back to the background.
3. Collecting and accumulating all reliability parameters of the power communication system, wherein the accumulated parameters are the safety reliability assessment value of the power communication network, judging and classifying according to the safety reliability assessment value of the power communication network and a preset standard value, judging to be in a qualified state when the safety reliability assessment value of the power communication network is equal to the preset standard value, generating a qualified signal and sending the qualified signal to a background, when the safety reliability evaluation value of the power communication network is less than a preset standard value, the power communication network is judged to be in a defect state, a defect signal is generated and sent to a background, when the safety reliability evaluation value of the power communication network is larger than a preset standard value, the power communication network is judged to be in an ideal state, an ideal signal is generated and sent to a background, and when the preset standard value-the electric power communication network safety reliability evaluation value is 0, judging that the electric power communication network is in a paralyzed state, generating a paralyzed signal and an alarm prompt, and sending the paralyzed signal and the alarm prompt to a background.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A reliability evaluation method for a power communication system comprises the following steps:
step A: determining an evaluation target of the power communication network, wherein the evaluation target comprises network conditions, node equipment, a communication machine room environment and a transmission medium;
and B: constructing a hierarchical structure index system of an evaluation model, and conceptualizing a complex problem;
and C: establishing an index weight model of an evaluation model, comparing each index of the same layer with each index of the previous layer pairwise to construct an index judgment matrix, and calculating the maximum characteristic of the index judgment matrix and a corresponding standardized characteristic vector, namely the weight value of the index;
step D: collecting data of the power communication network, wherein the data comprises statistical data of operation and maintenance of a power communication department and fault reports;
step E: index indexing of the power communication network, which comprises carrying out non-dimensionalization processing on the collected data, namely index indexing;
step F: calculating an evaluation target value of the power communication network, and calculating the safety and reliability of each indexed index and the index weight value by using a calculation method of an evaluation model to obtain a final evaluation target value, and expressing the final evaluation target value in a percentile score form;
step G: according to the evaluation target value and a preset standard value, carrying out grade evaluation on the reliability of the power communication;
the calculation step of calculating the evaluation target value of the power communication network comprises the following steps:
1) the network condition security evaluation formula is expressed as:
U1＝∑ω1mh×U1∞h；
in the formula of U1∞hExpressed as a network risk value, ∑ ω1mhCarrying out forward processing on the risk value;
2) the node equipment reliability evaluation formula is expressed as:
U2＝∑ω21h×(1-U21h),(h＝1,2,…,9)；
wherein, when h is 1, U211Representing the failure rate of the optical equipment, when h is 2, U212Representing the failure rate of the access equipment, when h is 3, U213Representing the failure rate of the communication power supply, when h is 4, U214Representing the failure rate of the synchronous clock, when h is 5, U215Representing the failure rate of the switching system, when h is 6, U216Representing the failure rate of the network equipment, when h is 7, U217Representing the failure rate of the wiring system, when h is 8, U218Representing the failure rate of the carrier system, when h is 9, U219Representing microwave systemsFailure rate, since the contribution of equipment failure rate to safety reliability is reversed, by the formula ∑ ω21hCarrying out forward processing;
3) the environment formula of the communication machine room is expressed as follows:
U3＝∑ω31h×U31h,(h＝1,2,...,5)；
wherein when h is 1, U311Representing the rate of unqualified temperature in the machine room, when h is 2, U is312Representing the humidity unqualified rate of the machine room, when h is 3, U is313Representing the unqualified rate of the cleanliness of the machine room, and when h is 4, U is added314Representing the unqualified lightning grounding rate of the machine room, and when h is 5, U is315Representing the rate of unqualified fire prevention and theft prevention in the machine room through a formula ∑ omega31hCarrying out forward processing;
4) the transmission medium reliability equation is expressed as:
U4＝ω321×(1-U321)+ω322×U322；
in the formula of U321Representing the cable defect rate, U322Representing the type of cable, passing through ω321、ω322The data is processed in a forward mode, and the defect rate of the optical cable is expressed as
5) Preset network conditional Security Standard Mark
Preset node device reliability criteria flag
Preset communication room environment standard mark
Preset transport medium standard mark
Judging and processing the network condition security, the node equipment reliability, the communication machine room environment and the transmission medium reliability respectively, wherein the judging and processing steps are as follows;
when in use
Judging as a network condition primary index;
when in use
Judging the secondary index of the network condition, and generating a network condition warning signal;
when in use
Judging as a node equipment primary index;
when in use
Judging as a node equipment secondary index, and generating a node equipment warning signal;
when in use
Judging as a first-level index of the environment of the communication machine room;
when in use
Judging the environment secondary index of the communication machine room, and generating an environment warning signal of the communication machine room;
when in use
Determining a first-level index of a transmission medium;
when in use
Judging as a transmission medium secondary index, and generating a transmission medium warning signal;
6) the safety and reliability assessment formula of the power communication network is represented as follows:
U＝ω1×U1+ω2×U2+ω3×U3+ω4×U4；
in the formula of U1Indicates the network condition, U2Representing node devices, U3Represents an environmental factor, U4Representing the reliability of the transmission medium, ω1、ω2、ω3、ω4Are respectively U1、U2、U3、U4The weight value of (2).
The hierarchical structure index system of the evaluation model is divided into a target layer, an index layer and an index basis layer, wherein the target layer is the highest layer in the index system structure, the index layer is the middle layer in the index system structure, and the index basis layer is the lowest layer in the index system structure;
the target layer comprises four primary indexes which are respectively network conditions, node equipment, environmental factors and transmission media; the network conditions mainly include the survivability, survivability and instantaneity of the network, the scale coverage of key equipment and services and the surplus condition of network resources, the network conditions are divided into network anti-risk indexes, service anti-risk indexes and network resource surplus indexes, the node equipment mainly reflects the influence of network elements on the safety and reliability, the node equipment comprises the fault rate, the redundancy and the communication power redundancy of each equipment, the power-saving equipment indexes are divided into equipment reliability indexes, equipment redundancy indexes and communication power redundancy indexes, the environmental factors mainly aim at the environment where the network is located, and the environmental factor indexes are divided into communication machine room environmental indexes, transmission medium reliability indexes and site geographical environment indexes;
the index judgment matrix is an improvement on a relative comparison method and also belongs to an experience scoring method, and is characterized in that all indexes are listed to form an N × N square matrix, then each index is compared pairwise and scored, finally the scores of each index are summed and normalized, wherein dimensionless refers to that a part or all units of an equation related to physical quantity are removed through appropriate variable substitution so as to achieve the purpose of simplifying experiments or calculating;
the weight value of the index refers to the quantitative value of the value and relative importance degree of each survey index of a measured object in the whole and the proportion, according to the statistical principle, the sum of the weight of each index contained in a certain object is regarded as 1 (namely 100%), the weight of each index is expressed by decimal number and is called as a weight coefficient, the comprehensive evaluation weight of the whole constitution is 1, the comprehensive evaluation weight of the whole constitution comprises three index series, the weight coefficient of a morphological part is 0.2, the weight coefficient of a functional part is 0.2, and the weight coefficient of a quality part is 0.6;
the step G of evaluating the reliability level of the power communication comprises the following steps:
s01: acquiring a safety reliability evaluation value of the power communication network;
s02: judging according to the safety reliability evaluation value of the power communication network and a preset standard value:
when the safety reliability evaluation value of the power communication network is equal to a preset standard value, judging that the power communication network is in a qualified state;
when the safety reliability evaluation value of the power communication network is less than a preset standard value, judging the power communication network to be in a defect state;
when the safety reliability evaluation value of the power communication network is larger than a preset standard value, the power communication network is judged to be in an ideal state;
and when the (preset standard value-electric power communication network safety reliability assessment value) is 0, determining that the electric power communication network safety reliability assessment value is in a paralyzed state.
When the invention is used, the network condition security U is respectively obtained1Node equipment reliability U2Communication machine room environment U3Reliability of transmission medium U4The network condition security evaluation formula is expressed as U1＝∑ω1mh×U1∞hIn the formula, U1∞hExpressed as a network risk value, ∑ ω1mhCarrying out forward processing on the risk value, and expressing the node equipment reliability evaluation formula as U2＝∑ω21h×(1-U21h) (h 1, 2.., 9), when h is 1, U211Representing the failure rate of the optical equipment, U2Indicating the normal operation index of the optical device, when h is 2, U212Representing access device failure rate, U2The normal operation index of the access equipment is shown, and when h is 3, U213Representing the failure rate of the communication power supply, U2The normal index of the communication power supply is shown, and when h is 4, U is214Representing the failure rate of the synchronous clock, U2Indicates that the synchronous clock runs at a normal index, when h is 5, U215Representing switching system failure rate, U2The normal operation index of the switching system is shown, and when h is 6, U216Representing the failure rate of the network device, U2The normal operation index of the network equipment is shown, and when h is 7, U217Representing the wiring system failure rate, U2The normal operation index of the wiring system is shown, and when h is 8, U is218Representing the carrier system failure rate, U2The normal operation index of the carrier system is shown, and when h is 9, U219Representing the failure rate, U, of the microwave system2The normal operation index of the microwave system is shown, and the environment formula of the communication machine room is shown as U3＝∑ω31h×U31h(h 1,2, 5), wherein, when h 1, U is a radical311Representing the rate of unqualified temperature in the machine room, when h is 2, U is312Representing the humidity unqualified rate of the machine room, when h is 3, U is313Representing the unqualified rate of the cleanliness of the machine room, and when h is 4, U is added314Representing the unqualified lightning grounding rate of the machine room, and when h is 5, U is315Representing the rate of unqualified fire prevention and theft prevention of the machine room, the reliability formula of the transmission medium is expressed as U4＝ω321×(1-U321)+ω322×U322In the formula, U321Representing the cable defect rate, U322Representing the type of cable, passing through ω321、ω322The data is processed in a forward mode, and the defect rate of the optical cable is expressed as
Wherein
After obtaining U1、U2、U3、U4Then, through power communication network securityReliability evaluation formula U ═ ω1×U1+ω2×U2+ω3×U3+ω4×U4U represents the power communication network safety reliability index, wherein U represents1Indicates the network condition, U2Representing node devices, U3Represents an environmental factor, U4Representing the reliability of the transmission medium, ω1、ω2、ω3、ω4Are respectively U1、U2、U3、U4The weighted value is judged according to the safety reliability evaluation value of the power communication network and a preset standard value, when the safety reliability evaluation value of the power communication network is equal to the preset standard value, the weighted value is judged to be in a qualified state, a qualified signal is generated and sent to a background, when the safety reliability evaluation value of the power communication network is smaller than the preset standard value, the weighted value is judged to be in a defective state, a defective signal is generated and sent to the background, when the safety reliability evaluation value of the power communication network is larger than the preset standard value, the weighted value is judged to be in an ideal state, an ideal signal is generated and sent to the background, when the safety reliability evaluation value of the power communication network is larger than the preset standard value-the safety reliability evaluation value of the power communication network is equal to 0
Preset node device reliability criteria flag
Preset communication room environment standard mark
Preset transport medium standard mark
Respectively judging and processing the network condition security, the node equipment reliability, the communication machine room environment and the transmission medium reliability when the network condition security, the node equipment reliability, the communication machine room environment and the transmission medium reliability are judged and processed
When the network condition is judged to be a primary index, the network condition is in a reliable state at present, and when the network condition is judged to be a primary index, the network condition is in a reliable state at present
When the network condition is judged to be a secondary index, the network condition is represented to be in an unreliable state at present, a network condition warning signal is generated and sent to a background, and when the network condition warning signal is generated, the network condition secondary index is judged to be in an unreliable state at present
When the node equipment is judged to be in the first-level index, the node equipment indicates that the power-saving equipment is in the reliable state currently, and when the node equipment is in the reliable state
Judging as a node equipment secondary index, representing the current unreliable state of the power-saving equipment, generating a node equipment warning signal, and judging as the node equipment secondary index is in the unreliable state
Judging to be a first-level index of the environment of the communication machine room, indicating that the environment of the communication machine room is in a reliable state currently, and judging to be a second-level index of the environment of the communication machine room when the environment of the communication machine room is in a reliable state
Judging to be a secondary index of the environment of the communication machine room, indicating that the environment of the communication machine room is in an unreliable state at present, generating an environment warning signal of the communication machine room and sending the environment warning signal to a background, and when the environment warning signal is in an unreliable state
Judging as a primary index of the transmission medium, indicating that the transmission medium is currently in a reliable state when
And judging as a secondary index of the transmission medium, indicating that the transmission medium is in an unreliable state at present, generating a transmission medium warning signal and sending the transmission medium warning signal to the background.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (8)
1. A reliability evaluation method for an electric power communication system is characterized by comprising the following steps:
step A: determining an evaluation target of the power communication network, wherein the evaluation target comprises network conditions, node equipment, a communication machine room environment and a transmission medium;
and B: constructing a hierarchical structure index system of an evaluation model, and conceptualizing a complex problem;
and C: establishing an index weight model of an evaluation model, comparing each index of the same layer with each index of the previous layer pairwise to construct an index judgment matrix, and calculating the maximum characteristic of the index judgment matrix and a corresponding standardized characteristic vector, namely the weight value of the index;
step D: collecting data of the power communication network, wherein the data comprises statistical data of operation and maintenance of a power communication department and fault reports;
step E: index indexing of the power communication network, which comprises carrying out non-dimensionalization processing on the collected data, namely index indexing;
step F: calculating an evaluation target value of the power communication network, and calculating the safety and reliability of each indexed index and the index weight value by using a calculation method of an evaluation model to obtain a final evaluation target value, and expressing the final evaluation target value in a percentile score form;
step G: according to the evaluation target value and a preset standard value, carrying out grade evaluation on the reliability of the power communication;
wherein the calculating step of calculating the evaluation target value of the power communication network comprises:
1) the network condition security evaluation formula is expressed as:
U1＝∑ω1mh×U1∞h；
in the formula of U1∞hExpressed as a network risk value, ∑ ω1mhCarrying out forward processing on the risk value;
2) the node equipment reliability evaluation formula is expressed as:
U2＝∑ω21h×(1-U21h),(h＝1,2,...,9)；
wherein, when h is 1, U211Representing the failure rate of the optical equipment, when h is 2, U212Representing the failure rate of the access equipment, when h is 3, U213Representing the failure rate of the communication power supply, when h is 4, U214Representing the failure rate of the synchronous clock, when h is 5, U215Representing the failure rate of the switching system, when h is 6, U216Representing the failure rate of the network equipment, when h is 7, U217Representing the failure rate of the wiring system, when h is 8, U218Representing the failure rate of the carrier system, when h is 9, U219Representing the failure rate of the microwave system, since the contribution of the failure rate of the equipment to the safety reliability is reversed, by the formula ∑ ω21hCarrying out forward processing;
3) the environment formula of the communication machine room is expressed as follows:
U3＝∑ω31h×U31h,(h＝1,2,...,5)；
wherein when h is 1, U311Representing the rate of unqualified temperature in the machine room, when h is 2, U is312Representing the humidity unqualified rate of the machine room, when h is 3, U is313Representing the unqualified rate of the cleanliness of the machine room, and when h is 4, U is added314Representing the unqualified lightning grounding rate of the machine room, and when h is 5, U is315Representing the rate of unqualified fire prevention and theft prevention in the machine room through a formula ∑ omega31hCarrying out forward processing;
4) the transmission medium reliability equation is expressed as:
U4＝ω321×(1-U321)+ω322×U322；
in the formula of U321Representing the cable defect rate, U322Representing the type of cable, passing through ω321、ω322The data is processed in a forward mode, and the defect rate of the optical cable is expressed as
Wherein
5) Preset network condition security standard tag U1bzThe preset node equipment reliability standard mark is U2bzPresetting the environmental standard mark of the communication machine room as U3bzThe preset transmission medium standard mark is U4bzRespectively judging and processing the network condition security, the node equipment reliability, the communication machine room environment and the transmission medium reliability, wherein the judging and processing steps are as follows;
when U is turned1≥U1bzJudging as a network condition primary index;
when U is turned1＜U1bzJudging the secondary index of the network condition, and generating a network condition warning signal;
when U is turned2≥U2bzJudging as a node equipment primary index;
when U is turned2＜U2bzJudging as a node equipment secondary index, and generating a node equipment warning signal;
when U is turned3≥U3bzJudging as a first-level index of the environment of the communication machine room;
when U is turned3＜U3bzJudging the environment secondary index of the communication machine room, and generating an environment warning signal of the communication machine room;
when U is turned4≥U4bzJudging as a first-level index of the transmission medium;
when U is turned4＜U4bzJudging as a transmission medium secondary index, and generating a transmission medium warning signal;
6) the safety and reliability assessment formula of the power communication network is represented as follows:
U＝ω1×U1+ω2×U2+ω3×U3+ω4×U4；
in the formula of U1Indicates the network condition, U2Representing node devices, U3Represents an environmental factor, U4Representing the reliability of the transmission medium, ω1、ω2、ω3、ω4Are respectively U1、U2、U3、U4The weight value of (2).
2. The reliability assessment method for electric power communication system according to claim 1, wherein the hierarchical index system of the assessment model is divided into a target layer, an index layer and an index-dependent layer, wherein the target layer is the highest layer in the index system structure, the index layer is the middle layer in the index system structure, and the index-dependent layer is the lowest layer in the index system structure.
3. The reliability assessment method for the power communication system according to claim 2, wherein the target layer comprises four primary indexes, which are network conditions, node devices, environmental factors, and transmission media.
4. The reliability assessment method for the power communication system according to claim 3, wherein the network conditions mainly include survivability and real-time performance of the network, scale coverage of key devices and services, and surplus conditions of network resources, the network conditions mainly include a network risk resistance index, a service risk resistance index, and a network resource redundancy index, the node devices mainly reflect the influence of network elements on safety and reliability, including failure rate, redundancy, and communication power redundancy of each device, the power saving device indexes mainly include a device reliability index, a device redundancy index, and a communication power redundancy index, the environmental factors mainly aim at the environment where the network is located, and the environmental factor indexes mainly include a communication machine room environment index, a transmission medium reliability index, and a site geographic environment index.
5. The method as claimed in claim 1, wherein the index determination matrix is an improvement of a relative comparison method and is also an empirical scoring method, and all indexes are listed to form an N × N square matrix, then each index is compared with each other and scored, and finally the scores of each index are summed and normalized.
6. The reliability assessment method for electric power communication system according to claim 1, wherein the non-dimensionalization means removing part or all of a unit of an equation relating to physical quantities by a suitable variable substitution for the purpose of simplifying experiment or calculation.
7. The method as claimed in claim 1, wherein the weighted value of the index is a quantitative value of the overall value and relative importance of each survey index of a measured object.
8. The reliability assessment method for power communication system according to claim 1, wherein the step of assessing the reliability level of power communication in step G comprises:
s01: acquiring a safety reliability evaluation value of the power communication network;
s02: judging according to the safety reliability evaluation value of the power communication network and a preset standard value:
when the safety reliability evaluation value of the power communication network is equal to a preset standard value, judging that the power communication network is in a qualified state;
when the safety reliability evaluation value of the power communication network is less than a preset standard value, judging the power communication network to be in a defect state;
when the safety reliability evaluation value of the power communication network is larger than a preset standard value, the power communication network is judged to be in an ideal state;
and when the (preset standard value-electric power communication network safety reliability assessment value) is 0, determining that the electric power communication network safety reliability assessment value is in a paralyzed state.
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