CN105404962B - The transformation appraisal procedure of power system relay protection device and its generation system - Google Patents
The transformation appraisal procedure of power system relay protection device and its generation system Download PDFInfo
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Abstract
A kind of Reconstruc-tion policy of power system relay protection device, is characterized in that comprising the following steps：S1, calculates protective relaying device Life cycle cost；S2, determines Reconstruc-tion policy：Try to achieve the whole life costing year value minima of protective relaying device：F (n)=Min (ALCC).The generation system of above-mentioned power system relay protection device Reconstruc-tion policy, is characterized in that：Generate system (server, data base, safety protection equipment and application software) including protective relaying device Reconstruc-tion policy; it connects input method of operation management data base, medium-term and long-term plans data base, EMS system and the asset management system, output relay protection transformation project and program respectively.Beneficial effect：(1) it is worth according to whole life costing off year and determines the transformation time, reduce the loss that protective relaying device fault is brought.(2) generation system can complete the transformation assessment of protective relaying device automatically according to power system situation and historical information, alleviates the workload of artificial assessment.
Description
Technical field
The present invention relates to a kind of transformation appraisal procedure of power system relay protection device.The invention still further relates to described relay
Protection device transforms the generation system of appraisal procedure.
Background technology
Abbreviation and Key Term definition
Protective relaying device：When the force device (as electromotor, circuit etc.) in power system or power system itself are sent out
When having given birth to fault and having jeopardized safe operation of power system, can send warning signal in time to operator or directly to
The chopper being controlled sends trip signal to terminate a kind of measure of automatization and the equipment of the development of these events.
Power system the first line of defence：For ensureing power system normal operating condition and bearing single failure (probability of occurrence
Higher fault) when safety requirements, be made up of primary system facility, relay protection and safety and stability preventive control etc..
Any equipment has life cycle, and after equipment reaches service life, probability of failure can greatly increase, protection device
Malfunction and tripping all can bring serious consequence to power system it is therefore desirable to whether transform to the protection device putting into operation and what
When transformation be estimated.
In order to improve electric grid investment benefit, the transformation of usual power equipment adopts Life cycle cost management (LCC) to manage
Read, Multi-Objective Decision Theory and value chain management thought combine, working assets lifecycle management (Life Cycle
Asset Management) theory formulate power equipment Reconstruc-tion policy.Protective relaying device belongs to secondary equipment in power system
One kind, its transformation generally also in this way.
Because relay protection belongs to the first line of defence of power system, the safe and stable operation to power system and guarantee supply
Electric reliability is extremely important, and the Reconstruc-tion policy therefore formulated from the angle of equipment itself merely, due to not examining
Consider protective relaying device and be arranged on the impact that in power system, position difference is brought it is impossible to react the urgent journey of transformation completely
Degree, needs the other indexs of increase to be weighed；Also have and be exactly, the Reconstruc-tion policy formulated from the angle of equipment itself merely, also not
Consider difference on different time for the protective relaying device operation risk, often only consider the situation of most serious it is impossible to comprehensively anti-
Reflect the urgent degree of scrap build demand.
Prior art one related to the present invention
The technical scheme of prior art one
Chinese patent is announced and disclosed application publication number on bulletin is CN104063551A, entitled《A kind of aviation electronics
The modeling method of system Life cycle unified model》Chinese invention patent application, this invention is related to a kind of aviation electronics system
The modeling method of system Life cycle unified model, including：Avionics system is resolved into system, subsystem, equipment, module
And element；According to development dimension, set up demand model, framework model, Action logic model, man-machine interaction model, ICD mould
Type, hardware model, software model and test model；Set up the annexation between each model, form system-level model, subsystem
Level model, device level model, module level model and Element-Level model；Integrated system level model, subsystem level model, device level mould
Type, module level model and Element-Level model, form unified model.With it, avionics system can be set up exactly
Life cycle unified model, this unified model can be to the overall software/hardware framework of avionics system, function, interface, behavior
Described etc. effectively, support system-level comprehensive simulating, realize the seamless delivery of data in R＆D process.
The shortcoming of prior art one
(1) only from the feature of electronic system itself, set up electronic system Life cycle model, do not consider Department of Electronics
The application places of system, i.e. applied environment；
(2) only from the feature of electronic system itself, do not consider that the system failure or defect cause the cost of consequence；
Prior art two related to the present invention
The technical scheme of prior art two
Chinese patent is announced and disclosed Authorization Notice No. on bulletin is CN204205711U, entitled《Power transformation in transformer station
Primary equipment Life cycle data collecting system》Chinese utility model patent application, this utility model discloses transformer station
Interior power transformation primary equipment Life cycle data collecting system.This system is by radio frequency recognizing electronic label, mobile operation PDA, logical
With universal serial bus, handling of goods and materials work station, production management's work station, backbone switch and device status data collection and management
The server composition of system.This utility model has advantages below：This utility model system makes between power production management personnel
And network interdynamic can be carried out between production management personnel and electrical network and be immediately connected, confluence analysiss are carried out to data message,
Realize data real-time, at a high speed, the general effect of transmitted in both directions, for improving reliability, the availability of power transformation primary equipment, make
Run and management reaches optimization.2. this utility model system promotes the raising further of intelligent grid level, is distributed number
According to collection create necessary condition；And by data interaction realize electrical network Observable, controllable, can spontaneous recovery.
The shortcoming of prior art two
This utility model lays particular emphasis on information gathering and the system design of managed devices, not to how carrying out full Life Cycle
Period management proposes concrete grammar.
Content of the invention
First technical problem to be solved by this invention is it is simply that provide a kind of transformation of power system relay protection device
Appraisal procedure.
Second technical problem to be solved by this invention is it is simply that provide a kind of described protective relaying device to transform assessment side
The generation system of method.
The protective relaying device transformation appraisal procedure that system generates is generated using the transformation appraisal procedure of the present invention, first may be used
Realize the transformation of protective relaying device strategy quantification of targets；Secondly by design relay protection transformation assessment system, enable to continuing
The real-time Risk-warning of electrical protective device running status, system can count and specify risk (such as certain year in the time period as needed
Interior)；Can be also finally relay protection improvement project by setting up the comprehensive evaluation index model of relay protection Reconstruc-tion policy
Decision-making foundation is provided.
Solve above-mentioned first technical problem, the technical solution used in the present invention is as follows：
A kind of transformation appraisal procedure of power system relay protection device, is characterized in that comprising the following steps：
S1, calculates protective relaying device Life cycle cost
The LCC cost structure model of protective relaying device is：
CLCC=CI+CO+CM+CF+CD
In formula：
CLCCRepresent overall life cycle cost；
CIRepresent initial outlay cost, including original equipment cost, traffic expense, warehousing charge and installation and debugging expense；
CORepresent operating cost, including energy consumption cost, operations staff's expense and operational and administrative expenses；
CMRepresent repair and maintenance cost, use including the cost of overhaul and change material installation expense；
CFRepresent breakdown loss cost；Including the direct cost causing because of immediate cause or factor, and social bad shadow
Ring and the impaired indirect loss causing of prestige；
Described direct cost includes：Interruption of power supply failure costs, fault restoration expense, equipment performance and life consumption take
With；
CDRepresent retired cost of disposal, refer to remove the residual value of old engineering cost and used equipment；
Carry out failure cost CFDuring calculating, in addition it is also necessary to calculate probability of malfunction in addition to needing to calculate breakdown loss expense；
Probability of malfunction refers to the number of times of device fails in the regular period, and probability of malfunction is annualized；
CF=CFg×CFf
In formula：
CFgFor fault rate；
CFfFor breakdown loss expense；
(1) fault rate
Fault rate is calculated with the reliability of equipment, and the characteristic quantities of equipment have reliability R (t), lost efficacy
Probability density f (t), cumulative failure probability F (t), crash rate λ (t) and average life MTTF/MTBF；
Wherein fault rate to be represented with cumulative failure probability F (t)；
Cumulative failure probability F (t) is exactly life distribution function, also referred to as unreliable degree, and it is the condition in regulation for the product
The probability losing efficacy down and in the time of regulation, is expressed as：
F (t)=P (T≤t)=1-R (t)；
(2) secondary device breakdown loss expense
The failure costs that secondary device fault produces is personal security incident event, power equipment accident event and power ampere
The loss sum that full accident event causes；
S2, determines transformation appraisal procedure
Year, value class index was according to basic discount rate by Life cycle cost, and the resources flow that each year is occurred is converted and is
The uniform annuity sequence that is equivalent, being distributed in each year end with this net cash flow sequence；
The computing formula that year is worth class index is as follows：
In formula：
ASE represents Life cycle benefit year value；
PSE represents Life cycle benefit present worth；
N represents life cycle；
I represents basic discount rate；
ALCC represents that Life cycle becomes this year value；
PLCC represents Life cycle present value of cost；
It is worth class index from index for year, i.e. whole life costing year value：
LCCjRepresent the income in jth year.
Therefore protective relaying device transformation strategy as try to achieve protective relaying device whole life costing year value
Little value：
F (n)=Min (ALCC).
Solve above-mentioned second technical problem, the technical solution used in the present invention is as follows：
A kind of above-mentioned power system relay protection device transforms the generation system of appraisal procedure, it is characterized in that：Including relay
Protection device Reconstruc-tion policy generates system (server, data base, safety protection equipment and application software) 1, and it connects defeated respectively
Enter method of operation management data base 2, medium-term and long-term plans data base 3, EMS4 and Properties MIS 5, export relay protection
Transformation project and program 6；
Described method of operation management database purchase output power system status information, medium-term and long-term plans data stock
Store up and export information at a specified future date, EMS storage output power system real time status, assets information system to store and export relay protection
Production time (time started of Life cycle), initial outlay cost, operating cost, repair and maintenance cost；
Described protective relaying device Reconstruc-tion policy generates system according to the load condition obtaining from EMS and assets information system
It is calculated breakdown loss cost during the probability of malfunction situation that system obtains, obtained by calculating whole life costing year value minima
To the transformation time of protective relaying device, and according to the real time status information of power system, result is modified.
The beneficial effect that technical solution of the present invention is brought：
(1) formulated the transformation appraisal procedure of protective relaying device, changed according to whole life costing off year value determination
Make the time, reduce the loss that protective relaying device fault is brought.
(2) its generation system is devised according to transformation appraisal procedure, can believe automatically according to power system situation and history
Breath completes the transformation assessment of protective relaying device, alleviates the workload of artificial assessment, automatically generates the item of protection device transformation
Mesh storehouse and program.
Brief description
Fig. 1 is the generation system composition of power system relay protection device transformation appraisal procedure and the annexation of the present invention
Schematic diagram.
Specific embodiment
As shown in figure 1, the power system relay protection device of the present invention transforms the generation system embodiment of appraisal procedure, bag
Include protective relaying device Reconstruc-tion policy and generate system 1, it connects input method of operation management data base 2, medium-term and long-term plans respectively
Data base 3, EMS4 and Properties MIS 5, output relay protection transformation project and program 6.
Method of operation management database purchase output power system status information, medium-term and long-term plans database purchase defeated
Go out information at a specified future date to store and export relay from planning acquisition, EMS storage output power system real time status, assets information system
The production time (time started of Life cycle) of protection, initial outlay cost, operating cost, repair and maintenance cost；Relay
Protection device Reconstruc-tion policy generates the probability of malfunction feelings that system obtains according to the load condition obtaining from EMS and assets information system
It is calculated breakdown loss cost during condition, be worth to changing of protective relaying device by calculating whole life costing year value minimum
Make the time, and according to the real time status information of power system, result is modified.
The transformation appraisal procedure embodiment of the power system relay protection device of the present invention, comprises the following steps：
S1, calculates protective relaying device Life cycle cost
The LCC cost structure model of protective relaying device is：
CLCC=CI+CO+CM+CF+CD
In formula：
CLCCRepresent overall life cycle cost；
CIRepresent initial outlay cost, including original equipment cost, traffic expense, warehousing charge, installation and debugging expense；
CORepresent operating cost, including energy consumption cost, operations staff's expense and operational and administrative expenses；
CMRepresent repair and maintenance cost, use including the cost of overhaul and change material installation expense；
CFRepresent breakdown loss cost；Including the direct cost causing because of immediate cause or factor, and social bad shadow
Ring and the impaired indirect loss causing of prestige；
Described direct cost includes：Interruption of power supply failure costs, fault restoration expense, equipment performance and life consumption take
With；
CDRepresent retired cost of disposal, refer to remove the residual value of old engineering cost and used equipment；
For same type of protective relaying device, such as 500kV line protective devices, its initial outlay cost, run into
Basis, repair and maintenance cost, breakdown loss cost, retired cost of disposal should identical or difference less, breakdown loss cost only
The obvious difference because the installation site of protection equipment, service condition are different.
Carry out failure cost CFDuring calculating, need to calculate breakdown loss expense in addition it is also necessary to calculate probability of malfunction；
Probability of malfunction refers to the number of times of device fails in the regular period, and probability of malfunction is annualized；
CF=CFg×CFf
In formula：
CFgFor fault rate；
CFfFor breakdown loss expense；
(1) fault rate
Fault rate is calculated with the reliability of equipment, and the characteristic quantities of equipment have reliability R (t), lost efficacy
Probability density f (t), cumulative failure probability F (t), crash rate λ (t) and average life MTTF/MTBF；
Wherein fault rate to be represented with cumulative failure probability F (t)；
Cumulative failure probability F (t) is exactly life distribution function, also referred to as unreliable degree, and it is the condition in regulation for the product
The probability losing efficacy down and in the time of regulation, is expressed as：
F (t)=P (T≤t)=1-R (t)；
(2) breakdown loss expense
Secondary device fault may lead to electric power personal injury event, power equipment accident event and electric power safety accident thing
Part, therefore needs to consider personal safety accident event, power equipment accident event and electric power safety accident thing in failure cost
The loss that part causes；
The failure costs that secondary device fault produces is above-mentioned expense sum；
S2, determines transformation appraisal procedure
Year, value class index was according to basic discount rate by Life cycle cost, and the resources flow that each year is occurred is converted and is
The uniform annuity sequence that is equivalent, being distributed in each year end with this net cash flow sequence；
The computing formula that year is worth class index is as follows：
In formula：
ASE represents Life cycle benefit year value；
PSE represents Life cycle benefit present worth；
N represents life cycle；
I represents basic discount rate；
ALCC represents that Life cycle becomes this year value；
PLCC represents Life cycle present value of cost；
Evaluation criterion for Life cycle benefit present worth index is to be the bigger the better；This year value is become for Life cycle
The evaluation criterion of index is the smaller the better；
In order to overcome the problem of the comparison bore that life cycle difference brings, the index of technological transformation Decision-Making Evaluation model selection is
Year is worth class index, i.e. whole life costing year value：
LCCjRepresent the income in jth year.
This index can overcome different cycles problem, it is contemplated that time value on assets.
Because initial outlay cost (CI) is fixing, operating cost (CO), repair and maintenance cost (CM) and life cycle
It is directly proportional, retired cost of disposal (CD) is reduced with the increase of life cycle, once it is determined that protective relaying device is in systems
Position, the increase with life cycle is increased by breakdown loss cost (CF), because the probability of malfunction of protective relaying device
Increasing.
Therefore protective relaying device transformation strategy as try to achieve protective relaying device whole life costing year value
Little value：
F (n)=Min (ALCC).
Claims (2)
1. a kind of transformation appraisal procedure of power system relay protection device, is characterized in that comprising the following steps：
S1, calculates protective relaying device Life cycle cost
The LCC cost structure model of protective relaying device is：
CLCC=CI+CO+CM+CF+CD；
In formula：
CLCCRepresent overall life cycle cost；
CIRepresent initial outlay cost, including original equipment cost, traffic expense, warehousing charge and installation and debugging expense；
CORepresent operating cost, including energy consumption cost, operations staff's expense and operational and administrative expenses；
CMRepresent repair and maintenance cost, use including the cost of overhaul and change material installation expense；
CFRepresent breakdown loss cost；Including the direct cost causing because of immediate cause or factor, and social harmful effect and letter
Praise the impaired indirect loss causing；
Described direct cost includes：Interruption of power supply failure costs, fault restoration expense, equipment performance and life consumption expense；
CDRepresent retired cost of disposal, refer to remove the residual value of old engineering cost and used equipment；
Carry out breakdown loss cost CFDuring calculating, in addition it is also necessary to calculate probability of malfunction in addition to needing to calculate breakdown loss expense；
Probability of malfunction refers to the number of times of device fails in the regular period, annualized；
CF=CFg×CFf；
In formula：
CFgFor fault rate；
CFfFor breakdown loss expense；
(1) fault rate
Fault rate is calculated with the reliability of equipment, and the characteristic quantities of equipment have reliability R (t), failure probability
Density f (t), cumulative failure probability F (t), crash rate λ (t) and average life MTTF/MTBF；
Wherein fault rate to be represented with cumulative failure probability F (t)；
Cumulative failure probability F (t) is exactly life distribution function, also referred to as unreliable degree, it be product under conditions of regulation and
The probability losing efficacy in the time of regulation, is expressed as：
F (t)=P (T≤t)=1-R (t)；
(2) secondary device breakdown loss expense
The failure costs that secondary device fault produces is personal security incident event, power equipment accident event and electric power safety thing
The loss sum that story part causes；
S2, determines Reconstruc-tion policy
Year, value class index was according to basic discount rate by Life cycle cost, and the resources flow that each year is occurred is converted and is and is somebody's turn to do
The uniform annuity sequence that net cash flow sequence is equivalent, be distributed in each year end；
The computing formula that year is worth class index is as follows：
In formula：
ASE represents Life cycle benefit year value；
PSE represents Life cycle benefit present worth；
N represents life cycle；
I represents basic discount rate；
ALCC represents that Life cycle becomes this year value；
PLCC represents Life cycle present value of cost；
It is worth class index from index for year, i.e. whole life costing year value：
LCCjRepresent the income in jth year；
The strategy of protective relaying device transformation as tries to achieve the whole life costing year value minima of protective relaying device：
F (n)=Min (ALCC).
2. a kind of generation system of method as claimed in claim 1, is characterized in that：Generate including protective relaying device Reconstruc-tion policy
System (1), it connects input method of operation management data base (2), medium-term and long-term plans data base (3), EMS (4) and assets respectively
Information management system (5), output relay protection transformation project and program (6)；
Described method of operation management data base (2) storage output power system status information, medium-term and long-term plans data base (3)
Store and export information at a specified future date, EMS (4) storage output power system real time status, Properties MIS (5) stores simultaneously
The production time of output relay protection, initial outlay cost, operating cost and repair and maintenance cost；
Described protective relaying device remodeling method generates system according to the load condition obtaining from EMS (4) and assets information pipe
It is calculated breakdown loss cost, by calculating whole life costing year value during the probability of malfunction situation that reason system (5) obtains
Minimum is worth to the transformation time of protective relaying device, and according to the real time status information of power system, result is modified.
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| CN107247815A (en) * | 2017-07-28 | 2017-10-13 | 中国能源建设集团浙江省电力设计院有限公司 | A kind of thermal power plant's host device Database Systems method for building up based on Life cycle cost |
| CN113076711B (en) * | 2021-03-09 | 2024-03-12 | 中国电力科学研究院有限公司 | Relay protection platform hardware design method and system based on component reliability |
| CN113869538A (en) * | 2021-10-09 | 2021-12-31 | 广东电网有限责任公司 | Value evaluation method and system for direct-current distribution network control and protection device |
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