CN103839187A - Comprehensive assessment index system for power-supplying capacity and operation level of regional power grid - Google Patents
Comprehensive assessment index system for power-supplying capacity and operation level of regional power grid Download PDFInfo
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- CN103839187A CN103839187A CN201210470965.8A CN201210470965A CN103839187A CN 103839187 A CN103839187 A CN 103839187A CN 201210470965 A CN201210470965 A CN 201210470965A CN 103839187 A CN103839187 A CN 103839187A
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Abstract
The invention relates to a comprehensive assessment method for the power-supplying capacity and operation level of regional power grids. The method includes the following steps: (1) establishing a small and medium power-grid comprehensive assessment index system which includes: an equipment level assessment index, a technical level assessment index and an operation level assessment index; (2) establishing an assessment characteristic function of the different indexes in the small and medium power-grid comprehensive assessment index system; (3) establishing a small and medium power-grid comprehensive assessment index math model. Through establishment of the index system and the math model and assistance of an advanced computer network technology level, system software is developed so that enterprise users are helped to perform detail analysis assessment of 33 classified third-grade indexes, 62 basic-type fourth-grade indexes and 17 detailed bottom-layer indexes of power devices under the management of the enterprise users from aspects of power-grid device level, power-grid technological level and power-grid operation level and the like and problems and defects existing in the power grids are pointed out in the form of quantization scoring so that a decision direction basis is provided to follow-up power-grid construction and transformation.
Description
Technical field
The invention belongs to electrical network field, especially a kind of regional power grid power supply capacity and run horizontal comprehensive estimation method.
Background technology
After entering 2000, the medium and small power grid construction of China enters the high speed development stage, electrical network scale is doubled year after year, along with the speed-raising of power grid construction, the data volume that administration of power networks personnel face is more and more huger, each specialty, there is the technical standard of magnanimity in all departments, technology guide rule, and the problem of facing is also more and more, how by Data classification, how to integrate prior art standard, technology guide rule, how to judge present situation grid equipment, operation, management level are that height is low, how to judge that electrical network exists which problem and hidden danger, how to determine existing problem should preferentially solve which etc.
The appearance of above problem, cause and in Electric Power Network Planning, construction, management, have much blindness, the pin pain for the treatment of the head when the head aches is cured pin, shortage system is considered and is long-term, a lot of management in power supply enterprise decision-making sections all propose to need one comprehensively, system, open-and-shut judgment criteria and real-time evaluation system, for solving the problem that partner runs in practical work process, we take up to set up rational electrical network evaluation index system.
Summary of the invention
The present invention is based upon for a long time in a large number on the basis of present situation electrical network analysis, by study of various Electric Power Network Planning, construction, operation technology guide rule, and with various places power department comprehensively, discuss on extensive issues, understand after its real demand, present situation puzzlement, by refining the technical standard that in all kinds of engineering philosophy, power grid construction is had key effect, according to the operation management custom of the attribute of index own and power department, set up index system.
The present invention solves its technical matters and takes following steps to realize:
(1) minor scale power net evaluation index system in foundation, this evaluation index system is by electrical network equipment, electric power network technique level, the horizontal three aspects: of power grid operation, and 33 classification indicators, 62 base class indexs form.
(2) set up in the evaluating characteristic function of each index in minor scale power net evaluation index system;
(3) set up medium and small electric network synthetic and evaluate mathematical model.
Model is according to analytical hierarchy process (AHP), from equipment evaluation index, technical merit evaluation index, 33 classification indicators of operation proficiency assessment index three aspects:, 62 base class indexs, every overall target score of minor scale power net assessment in calculating, count the shared weight of indices, include upper level in, finally draw comprehensive assessment score.Indices full marks are 100 points.Formula the following is
In formula
the score of k+1 layer attribute in representational level structure;
In formula, n represents the number of k straton attribute;
In formula
represent the score of j attribute in k layer;
In formula
represent the weight of j attribute in k layer.
Accompanying drawing explanation
Figure l is regional power grid power supply capacity and the horizontal comprehensive assessment index system of operation schematic diagram;
Fig. 2 is comprehensive assessment schematic flow sheet;
Fig. 3 is evaluating characteristic trigonometric function schematic diagram;
Fig. 4 is evaluating characteristic trapezoidal function schematic diagram;
Embodiment
Below in conjunction with accompanying drawing, the invention process is further described:
Medium and small mains supply ability and run horizontal comprehensive estimation method, comprises the following steps:
1, set up medium and small electric network synthetic evaluation index system, this evaluation index system comprises: equipment evaluation index, technical merit evaluation index, operation proficiency assessment index three aspects:;
As shown in Figure l, this method, according to analytical hierarchy process, is set up the horizontal comprehensive assessment index system of regional power grid power supply capacity and operation, and this assessment indicator system comprises following three class indexs:
(1) equipment evaluation index:
Can electrical network equipment assessment be mainly to consider assessment area grid equipment class and equipment adapt with the region development level of loading, catch up with the construction in city and the development of electric power.Evaluation index mainly comprises the following aspects: the high pressure main transformer operation time limit, reactive-load compensation configuration, medium-voltage line specification conditions, insulating level, the operation time limit, in be press-fitted varying capacity standardization, highly energy-consuming, information acquisition situation, medium voltage switchgear equipment is without oiling level, automatization terminal covering level etc., and each evaluation index is explained as follows in detail:
1. high pressure distribution equipment evaluation index comprises main transformer operation time limit index and reactive-load compensation configuring condition, and wherein main transformer operation time limit index comprises that the operation time limit exceedes 20 years main transformer ratios and the operation time limit exceedes 15 years main transformer ratios, and specific targets are described as follows:
The operation time limit exceedes 20 years main transformer ratios (%): this index is the main transformer situation for reflecting that assessment area is old, is mainly 20 years and above requirement according to main transformer lifetime in main transformer order technical conditions.Operation exceedes the main transformer of 20 years, and economy, security and the energy efficiency indexes of its operation is all very low, directly has influence on the stable operation of electrical network, and its concrete formula is that the time limit that puts into operation exceedes the total number of units of main transformer number of units/main transformer of 20 years.
The operation time limit exceedes 15 years main transformer ratios (%): this index is the main transformer situation for reflecting that assessment area is old.Mainly 15 years and above requirement according to distribution transforming lifetime in distribution transforming order technical conditions.Operation exceedes the distribution transforming of 15 years, and economy, security and the energy efficiency indexes of its operation all declines to some extent, and its concrete formula is that the time limit that puts into operation exceedes the total number of units of main transformer number of units/main transformer of 15 years.
Reactive-load compensation allocation ratio (%): this index has reflected the economic operation level of electrical network, rational idle configuration can guarantee the stable operation of quality of voltage and the electrical network of system, its concrete formula is Substation Reactive-power Compensation total volume/transforming plant main transformer total volume.
2. middle voltage distribution networks equipment evaluation index comprise medium-voltage line, in be press-fitted become and Medium voltage switch or circuit breaker evaluation index, wherein evaluate of lines index mainly comprises medium-voltage line backbone cross section situation, line insulation level, the circuit operation time limit, distribution transforming index mainly comprises capacity of distribution transform Standardization, whether belongs to energy saving transformer, the distribution transforming operation time limit and distribution transforming information acquisition situation, Medium voltage switch or circuit breaker index mainly comprises the switchgear operation time limit, without oiling level and automatization terminal covering level, specific targets are described as follows:
Trunk cross section disqualification rate (%): this index has reflected the situation of middle voltage distribution networks circuit operational reliability, cross section circuit defective or less than normal will affect the safe operation of electrical network, occurs power supply bottleneck.Its formula is that the cross-section of cable is less than backbone length/backbone total length that 240mm2, pole line cross section are less than 185mm2.
Line insulation rate (%): the circuit in this index is overhead transmission line and the cable line in assignment electric line, this index is the length sum/total line length of suspended insulated guide wire and cable.
Overhead transmission line insulation rate (%): overhead insulating rate affects the security of operation of power networks, and overhead insulating level is higher, and operation of power networks is safer, reliable.Length/pole line total length that its concrete formula is aerial insulated wire.
The circuit ratio (%) that the operation time limit is grown partially: this index is the distribution line situation for reflecting that assessment area is old.Exceed the circuit of 20 years working time, the economy of its operation, safety and reliability index all decline to some extent, and its concrete formula is that the time limit that puts into operation exceedes the line length/total line length of 20 years.
The public distribution transforming ratio (%) that the operation time limit is partially long: this index is the distribution transforming situation for reflecting that assessment area is old.Operation exceedes the distribution transforming of 20 years, and economy, security and the energy efficiency indexes of its operation all have very large decline, will threaten the long-term stability and safety operation of electrical network, and its concrete formula is that the time limit that puts into operation exceedes the total number of units of public distribution transforming number of units/public distribution transforming of 20 years.
High loss distribution transforming ratio (%): this index is for substation transformer in assessment electrical network is in the present situation aspect energy-saving and emission-reduction.Highly energy-consuming distribution transforming refers to that S7(contains S8) type and the more distribution transforming of early model, because it has exceeded the efficiency limit value stipulating in GB20052-2006 " Three-Phase Distribution Transformers efficiency limit value and Energy efficiency evaluation value ".
Separate unit capacity nonstandardized technique ratio (%): separate unit capacity nonstandardized technique ratio refers to the total number of units of distribution transforming number of units/distribution transforming beyond 4 kinds of capacity that the most often use in assessment area power distribution network.
The information-based acquisition rate of distribution transforming (%): the information-based acquisition rate of distribution transforming refers to the ratio that can gather the basic operation information of distribution transforming the distribution transforming number of units sum of uploading and the total number of units of distribution transforming, this index is that the operation information of evaluating distribution transforming in electrical network is uploaded situation.
The switch ratio (%) that the operation time limit is grown partially: this index is the switch situation for reflecting that assessment area is old.Operation exceedes the switch of 20 years, and economy, security and the energy efficiency indexes of its operation all declines to some extent, affects the permanently effective operation of electrical network, and its concrete formula is that the time limit that puts into operation exceedes the switch number/total number of switches of 20 years.
Switch is without oiling rate (%): switch refers to the ratio of non-oil switch number of units sum and the total number of units of switch without oiling rate, and this index is to evaluate panel switches in electrical network to transform situation without oiling.
Distribution power automation terminal coverage rate (%): this index is to evaluate the applicable cases in electrical network with the switch of " two is distant " and above function is also the index of evaluating power distribution automation performance.Distribution power automation terminal refers to possess the switch of " two is distant " and above function, and " two is distant " refers to remote signalling and remote measurement, and " three is distant " refers to remote signalling, remote measurement, remote control.
(2) technical merit evaluation index:
1. high pressure distribution technical merit evaluation index mainly comprises substation capacity configuration index and low-voltage side outlet interval index, and wherein substation capacity configuration index comprises single main transformer ratio and the monotropic ratio of single line; Low-voltage side outlet interval index comprises 10kV outgoing line interval utilization factor and user's special line accounting.Specific targets are described as follows:
Single main transformer ratio (%): single main transformer ratio refers to number/transformer station of single main transformer transformer station sum, has reflected the power supply reliability of region inner high voltage distribution, and in the single main transformer situation of transformer station, operation of power networks reliability is lower.
The monotropic ratio of single line (%): the monotropic ratio of single line refers to number/transformer station of the monotropic transformer station of single line sum, and ratio is lower, and operation of power networks reliability is higher.
Outgoing line interval utilization factor (%): 10kV outgoing line interval utilization factor refers to 10kV space-number/10kV interval sum of use, and the too high development to power distribution network of outgoing line interval utilization factor has certain restriction.
User's special line accounting (%): user's special line accounting refers to the ratio of user's special line number and circuit sum.
2. middle voltage distribution networks technical merit evaluation index comprises medium-voltage equipment situation and two aspects of networking mode, and wherein equipment index mainly comprises that radius of electricity supply and circuit articulate capacity of distribution transform situation; Networking mode index mainly comprises looped network ratio, the mode of connection, segmentation situation and networking standardization etc.
Wherein radius of electricity supply control index comprises average radius of electricity supply and the radius of electricity supply circuit accounting situation that exceeds standard; Circuit articulates capacity of distribution transform index and comprises the average attaching capacity of distribution transform of single back line and the higher circuit ratio of attaching capacity of distribution transform; Networking mode evaluation index comprises looped network ratio, the mode of connection, line sectionalizing and networking compliance index, and wherein looped network ratio index comprises contact ratio between overall contact ratio and station; Mode of connection index comprises the matching of mode of connection standardization, the mode of connection and load density, complicated interconnector ratio; Line sectionalizing index comprises overhead transmission line average mark hop count and the average segmentation capacity of overhead transmission line; Networking compliance index comprises differ greatly circuit ratio and articulate the capacity of distribution transform circuit ratio that differs greatly of main line wire gauge.Specific targets are described as follows:
Average radius of electricity supply (km): average radius of electricity supply refers to the mean value of line powering radius.
The radius of electricity supply ratio (%) that exceeds standard: radius of electricity supply exceeds standard, and (radius of electricity supply is considered standard depending on concrete assessment area to circuit number/circuit sum, wherein, the general radius of electricity supply in category-A area is not more than 3km, and category-B area is generally not more than 5km, and C class area is generally not more than 15km).
The average attaching capacity of distribution transform of single back line (kVA): the average attaching capacity of distribution transform of single back line refers to that circuit articulates distribution transforming total volume/circuit total number.
The circuit ratio (%) that attaching capacity of distribution transform is higher: the higher circuit ratio of attaching capacity of distribution transform refers to and articulate circuit number/circuit sum that capacity of distribution transform exceedes 12000kVA, the too high line load that easily causes of attaching capacity of distribution transform is high.
Looped network ratio (%): the integral load transfer ability of looped network ratio reflecting regional power distribution network and property safe and reliable to operation, ratio is higher, and safe operation of electric network reliability is higher, and its concrete formula is the number of lines sum/circuit total number that has contact.Wherein circuit comprises overhead transmission line and cable line.
Contact ratio (%) between standing: between standing, contact ratio refers to the number of lines sum/circuit total number that has contact with different substation.
Mode of connection standardization: mode of connection compliance index mainly refers to whether the selected mode of connection of assessment area power distribution network belongs to the mode of connection of several conventional standards, and whether subsection setup situation, the contact situation of circuit be reasonable.
The mode of connection and load density matching: the mode of connection mainly refers to load density matching whether the mode of connection (radiation, Single-ring network, the multi-joint network of many segmentations, dual-ring network etc.) that assessment area power distribution network is selected mates with region load density level.
Complicated interconnector ratio (%): complicated interconnector ratio refers to the ratio of 4 of contact points Above Transmission Lines number and circuit sum.
Overhead transmission line average mark hop count (section/bar): the equitable subsection of overhead transmission line can effectively be controlled the power failure range under failure condition, this index is mainly examined the average segment level of assessment area overhead transmission line, and its concrete formula is pole line segmentation sum/pole line total number
The average segmentation capacity of overhead transmission line (kVA): the rational segmentation capacity of overhead transmission line contributes to operation circuit fault and reduce economic loss in the time breaking down, its concrete formula is that pole line articulates distribution transforming total volume/pole line segmentation sum.
The main line wire gauge circuit ratio (%) that differs greatly: the main line wire gauge circuit ratio that differs greatly refers to the differ greatly ratio of circuit number and circuit sum of interconnector wire gauge.
Articulate the larger circuit ratio of capacity volume variance (%): articulate the larger circuit ratio of capacity volume variance and refer to that interconnector articulates capacity of distribution transform and differ the ratio of 5000kVA Above Transmission Lines number and circuit sum.
(3) operation proficiency assessment index:
Power grid operation proficiency assessment index mainly comprises high voltage substation loading condition, capacity-load ratio, medium voltage distribution network circuit, distribution transforming loading condition, other operation indicators such as distribution network failure situation, load transfer ability and power supply reliability, rate of qualified voltage, each evaluation index is explained as follows in detail:
1. high pressure distribution operation proficiency assessment index comprises transformer station's load factor and capacity-load ratio situation, and wherein transformer station's load factor comprises the heavily loaded ratio of Substation with Heavy Load ratio and single main transformer transformer station, and specific targets are described as follows:
Substation with Heavy Load ratio (%): this index has reflected regional power grid overall operation level, its concrete formula is that load factor exceedes number/transformer station of transformer station sum of 80%.
Single main transformer transformer station's heavy duty ratio (%): this index has reflected the reliable rate of region transformer station, its concrete formula is that load factor exceedes 80% single main transformer transformer station number/mono-main transformer transformer station sum.
Capacity-load ratio: this index adopts the capacity-load ratio of 35-110kV electric pressure, calculates by the regulation in " State Grid Corporation of China's urban power network planning and design guide rule ".
2. medium-voltage equipment index comprises line load rate index and distribution transforming load factor, and wherein line load rate index comprises circuit Rate of average load, heavy-haul line, overload circuit ratio, circuit heavy duty ratio and light-loaded circuit ratio in 3 years put into operation; Distribution transforming load factor index comprises distribution transforming Rate of average load, heavily loaded distribution transforming ratio and underloading distribution transforming ratio, and specific targets are described as follows:
Circuit Rate of average load (%): circuit Rate of average load is exactly the mean value of line load rate, mainly investigates the horizontal situation of local distribution network circuit average load.
Heavy, overload circuit ratio (%): circuit heavy duty refers to that circuit year maximum load rate is greater than 70% and continue more than 1 hour.Disregard the situation of the heavy load occurring in short-term under circuit abnormal running mode.The concrete formula of this index is that load factor exceedes circuit number/circuit sum of 70%.
Circuit heavy duty ratio (%) in 3 years puts into operation: this index high spot reviews Study on Power Grid Planning level.Its concrete formula be put into operation the time limit in 3 years and load factor exceed 70% circuit number/time limit circuit sum in 3 years puts into operation.
Circuit underloading ratio (%): this index is mainly investigated Study on Power Grid Planning level, in circuit underloading ratio assignment electrical network, load factor is less than 30% circuit number and the ratio of circuit sum.
Distribution transforming Rate of average load (%): the mean value of distribution transforming Rate of average load assignment varying duty rate, mainly investigate assessment area distribution transforming overall operation level.
Heavy duty distribution transforming ratio (%): distribution transforming heavy duty refer to distribution transforming year maximum load rate be greater than 80% and continue more than 2 hours.Disregard the heavy load situation occurring in short-term.Distribution transforming basic data is generally taken from distribution transforming information acquisition terminal, considers that current distribution transforming information acquisition rate is not high, according to physical condition, can choose the distribution transforming load factor of peak day as separate unit distribution transforming year maximum load rate.Its concrete formula is that load factor exceedes distribution transforming number/distribution transforming sum of 80%.
Underloading distribution transforming ratio (%): this index is to investigate distribution transforming operation conditions.Its concrete formula is distribution transforming number/distribution transforming sum that load factor is less than 30%.
Overhead transmission line fault outage rate (inferior/hundred kilometer year): this index refers to annual interior every 100km overhead transmission line fault outage number of times, has reflected power supply reliability in region.
Cable line fault outage rate (inferior/hundred kilometer year): this index refers to annual interior every 100km cable line fault frequency of power cut, has reflected power supply reliability in region.
Distribution transforming fault outage rate (inferior/hundred year): this index refers to annual interior every 100 station power distribution transformer fault frequencies of power cut.
Switchgear fault outage rate (inferior/hundred year): this index refers to the fault outage number of times of annual interior every 100 switchgears.
Outside destroy causes fault outage ratio (%): the ratio being caused by outside destroy in this index high spot reviews grid equipment fault outage reason.Anti-outside destroy work is the important means that electrical network improves power supply reliability, is the importance of the operation of reflection power supply enterprise, management level.Concrete formula is fault outage number of times/annual total failare frequency of power cut that annual outside destroy causes.
Operation exceedes 20 years line outage rates (inferior/hundred kilometer year): this index is the circuit situation for reflecting that assessment area is old, pays close attention to failure rate higher line road in old circuit.Consider in single line, the actual motion time limit of different line segments may be different, and therefore this index is added up by the length of circuit.In the time of statistics, the length that only exceedes the line segment of 20 years to moving the time limit is added up addition.Concrete formula is that operation exceedes the line outage number of times/operation of 20 years and exceedes circuit overall length × 100 of 20 years.
Operation surpasses 20 years distribution transforming fault outage rates (inferior/hundred year): this index is the distribution transforming situation for reflecting that assessment area is old.Mainly 20 years and above requirement according to distribution transforming lifetime in distribution transforming order technical conditions.Operation exceedes the distribution transforming of 20 years, and economy, security and the energy efficiency indexes of its operation all declines to some extent, should pay close attention to the wherein higher distribution transforming of failure rate.Concrete formula is that operation exceedes the distribution transforming fault outage number of times/operation of 20 years and exceedes total number of units × 100 of distribution transforming of 20 years.
The switch fault outage rate (inferior/hundred year) that operation surpasses 20 years: this index is the switch situation for reflecting that assessment area is old.According to mechanical life and the electrical endurance of switch, operation exceedes the switch of 20 years, and its reliability of operation, safety indexes all decline to some extent, should pay close attention to the wherein higher switch of failure rate.Concrete formula is that operation exceedes the switch fault frequency of power cut/operation of 20 years and exceedes total number of units × 100 of switch of 20 years.
Power supply reliability RS1(%): stipulate by " electric power system customer power supply reliability evaluation rules ".
Power supply reliability RS3(%): the reliability of body series emphasis assessment electrical network, do not consider due to not enough the rationing the power supply of causing of system power supply, therefore in the index of concentrated expression power supply reliability, mainly with adopting RS3 index.
Integrated voltage qualification rate (%): stipulate by " State Grid Corporation of China's power system voltage quality and var administrative provisions ".
D class rate of qualified voltage (%): this index definition is referring to State Grid Corporation of China " power system voltage quality and var administrative provisions ", and for directly reflecting electrical network user rate of qualified voltage situation, this index adopts D class rate of qualified voltage to assess.
Comprehensive line loss per unit (%): comprehensive line loss per unit, also referred to as statistical line losses rate, is the ratio of line loss electric weight and delivery, acquires a certain degree of difficulty because line loss electric weight obtains, and can obtain by the difference of delivery and electricity sales amount.
Iteration scheme customer interrupted rate (%): this index, for assessment of power supply enterprise's iteration scheme outage management level, is the importance of reflection operation of power networks level.This index is for repeating scheduled outage 2 times and above number of users divided by total number of users.
3. the transfer ability index of loading comprises main transformer " N-1 " verification, circuit " N-1 " verification and full cut-off verification, and specific targets are described as follows:
Do not meet transformer station's ratio (%) of main transformer " N-1 " verification: main transformer meets the total number of units of number of units sum/main transformer of N-1 safety criterion.
Circuit " N-1 " percent of pass (%): this index is to evaluate the Supply Security of distribution line under single failure condition, the confession ability that turns of high spot reviews circuit.This index is the regulation to circuit N-1 safety criterion by " State Grid Corporation of China's urban power network planning and design guide rule ".Concrete formula is the number of lines/circuit total number that has contact and meet N-1.
Do not meet transformer station's ratio (%) of full cut-off verification: this index is mainly considered the load transfer ability of assessment area power distribution network, in main transformer station's full cut-off situation of considering, only carry out transfer load by distribution, its Computer Corp. is sum/transformer station of the transformer station sum that does not meet full cut-off verification.
2, set up the evaluating characteristic function of each index in medium and small electric network synthetic evaluation index system;
According to the regional power grid power supply capacity described in claim 3,4,5 and run horizontal comprehensive estimation method, it is characterized in that: 66 base class index fundamental functions are all different, but be mainly linear function, trapezoidal function, the trigonometric function of by stages.
3, set up medium and small electric network synthetic evaluation index mathematical model.
According to the medium and small mains supply ability described in claim l and run horizontal comprehensive estimation method, it is characterized in that:
Described mathematical model is
In formula
the score of k+1 layer attribute in representational level structure;
In formula, n represents the number of k straton attribute;
In formula
represent the score of j attribute in k layer;
In formula
represent the weight of j attribute in k layer.
Model is according to analytical hierarchy process (AHP), from equipment evaluation index, technical merit evaluation index, 33 classification indicators of operation proficiency assessment index three aspects:, 62 base class indexs, every overall target score of minor scale power net assessment in calculating, count the shared weight of indices, include upper level in, finally draw comprehensive assessment score.Indices full marks are 100 points.
Table 1 regional power grid comprehensive assessment index system
| Sequence number | Overall target | Index weights |
| A | Equipment | 0.4 |
| A-1 | High pressure distribution | 0.2 |
| A-1-1 | The main transformer operation time limit | 0.5 |
| A-1-1-1 | The operation time limit exceedes 20 years main transformer ratios (%) | 0.7 |
| A-1-1-2 | The operation time limit exceedes 15 years main transformer ratios (%) | 0.3 |
| A-1-2 | Reactive-load compensation allocation ratio (%) | 0.5 |
| A-2 | Medium-voltage line | 0.4 |
| A-2-1 | Basic routing line cross section disqualification rate (%) | 0.4 |
| A-2-2 | Insulation rate | 0.3 |
| A-2-2-1 | Line insulation rate (%) | 0.5 |
| A-2-2-2 | Overhead transmission line insulation rate (%) | 0.5 |
| A-2-3 | The circuit ratio (%) that the operation time limit is greater than 20 years | 0.3 |
| A-3 | In be press-fitted change | 0.2 |
| A-3-1 | The public distribution transforming ratio (%) that the operation time limit is partially long | 0.3 |
| A-3-2 | High loss distribution transforming ratio (%) | 0.5 |
| A-3-3 | Separate unit capacity nonstandardized technique ratio (%) | 0.1 |
| A-3-4 | The information-based acquisition rate of distribution transforming (%) | 0.1 |
| A-4 | Medium voltage switch or circuit breaker | 0.2 |
| A-4-1 | The switch ratio (%) that the operation time limit is grown partially | 0.5 |
| A-4-2 | Switch is without oiling rate (%) | 0.3 |
| A-4-3 | Distribution power automation terminal covers (%) | 0.2 |
| B | Technical merit | 0.3 |
| B-1 | High pressure distribution | 0.3 |
| B-1-1 | Substation capacity configuration | 0.4 |
| B-1-1-1 | Single main transformer ratio (%) | 0.4 |
| B-1-1-2 | The monotropic ratio of single line (%) | 0.6 |
| B-1-2 | Low-voltage side outlet interval | 0.6 |
| B-1-2-1 | 10kV outgoing line interval utilization factor (%) | 0.7 |
| B-1-2-2 | User's special line accounting (%) | 0.3 |
| B-2 | Medium-voltage equipment | 0.3 |
| B-2-1 | Radius of electricity supply control | 0.5 |
| B-2-1-1 | Average radius of electricity supply (km) | 0.5 |
| B-2-1-2 | The radius of electricity supply ratio (%) that exceeds standard | 0.5 |
| B-2-2 | Circuit articulates capacity of distribution transform | 0.5 |
| B-2-2-1 | Single back line attaching distribution transforming average size (kVA) | 0.5 |
| B-2-2-2 | The circuit ratio (%) that attaching capacity of distribution transform is higher | 0.5 |
| B-3 | Networking mode | 0.4 |
| B-3-1 | Looped network ratio | 0.3 |
| B-3-1-1 | Looped network ratio (%) | 0.5 |
| B-3-1-2 | Contact ratio (%) between standing | 0.5 |
| B-3-2 | The mode of connection | 0.3 |
| B-3-2-1 | Mode of connection standardization | 0.4 |
| B-3-2-2 | The mode of connection and load density matching | 0.4 |
| B-3-2-3 | Complicated interconnector ratio (%) | 0.2 |
| B-3-3 | Line sectionalizing | 0.2 |
| B-3-3-1 | Overhead transmission line average mark hop count (section/bar) | 0.5 |
| B-3-3-2 | The average segmentation capacity of overhead transmission line (kVA) | 0.5 |
| B-3-4 | Networking standardization | 0.2 |
| B-3-4-1 | The main line wire gauge circuit ratio (%) that differs greatly | 0.5 |
| B-3-4-2 | Articulate the larger circuit ratio of capacity volume variance (%) | 0.5 |
| C | Operation level | 0.4 |
| C-1 | High pressure distribution | 0.2 |
| C-1-1 | Transformer station's load factor | 0.6 |
| C-1-1-1 | Substation with Heavy Load ratio (%) | 0.6 |
| C-1-1-2 | Single main transformer transformer station's heavy duty ratio (%) | 0.4 |
| C-1-2 | Capacity-load ratio | 0.4 |
| C-2 | Medium-voltage equipment | 0.25 |
| C-2-1 | Line load rate | 0.7 |
| C-2-1-1 | Circuit Rate of average load (%) | 0.3 |
| C-2-1-2 | Heavy, overload circuit ratio (%) | 0.4 |
| C-2-1-3 | Circuit heavy duty ratio (%) in 3 years puts into operation | 0.2 |
| C-2-1-4 | Light-loaded circuit ratio (%) | 0.1 |
| C-2-2 | Distribution transforming load factor | 0.3 |
| C-2-2-1 | Distribution transforming Rate of average load (%) | 0.4 |
| C-2-2-2 | Heavy duty distribution transforming ratio (%) | 0.5 |
| C-2-2-3 | Underloading distribution transforming ratio (%) | 0.1 |
| C-3 | Failure rate | 0.1 |
| C-3-1 | Equipment failure rate | 0.7 |
| C-3-1-1 | Overhead transmission line fault outage rate (inferior/hundred kilometer year) | 0.2 |
| C-3-1-2 | Cable line fault outage rate (inferior/hundred kilometer year) | 0.2 |
| C-3-1-3 | Distribution transforming fault outage rate (inferior/hundred year) | 0.2 |
| C-3-1-4 | Switchgear fault outage rate (inferior/hundred year) | 0.2 |
| C-3-1-5 | Outside destroy causes fault outage ratio (inferior/hundred kilometer year) | 0.2 |
| C-3-2 | Old equipment failure rate | 0.3 |
| C-3-2-1 | Operation exceedes 20 years line outage rates (inferior/hundred kilometer year) | 0.4 |
| C-3-2-2 | Operation exceedes 20 years distribution transforming fault outage rates (inferior/hundred year) | 0.3 |
| C-3-2-3 | Operation exceedes 20 years switch fault outage rates (inferior/hundred year) | 0.3 |
| C-4 | Operation indicator | 0.15 |
| C-4-1 | Power supply reliability | 0.3 |
| C-4-1-1 | Power supply reliability RS1(%) | 0.5 |
| C-4-1-2 | Power supply reliability RS3(%) | 0.5 |
| C-4-2 | Rate of qualified voltage | 0.3 |
| C-4-2-1 | Integrated voltage qualification rate (%) | 0.5 |
| C-4-2-2 | D class rate of qualified voltage (%) | 0.5 |
| C-4-3 | Comprehensive line loss per unit (%) | 0.3 |
| C-4-4 | Iteration scheme customer interrupted rate (%) | 0.1 |
| C-5 | Load transfer ability | 0.3 |
| C-5-1 | Do not meet transformer station's ratio (%) of main transformer " N-1 " verification | 0.3 |
| C-5-2 | Circuit " N-1 " percent of pass (%) | 0.3 |
| C-5-3 | Do not meet transformer station's ratio (%) of full cut-off verification | 0.4 |
It is emphasized that; embodiment of the present invention is illustrative; rather than determinate; therefore the present invention is not limited to the embodiment described in embodiment; every other embodiments that drawn by those skilled in the art's technical scheme according to the present invention, belong to the scope of protection of the invention equally.
Claims (6)
1. regional power grid power supply capacity and run a horizontal comprehensive estimation method, is characterized in that: comprise the following steps:
(1) set up medium and small electric network synthetic evaluation index system, this evaluation index system comprises: equipment evaluation index, technical merit evaluation index, operation proficiency assessment index three aspects:;
(2) set up the evaluating characteristic function of each index in medium and small electric network synthetic evaluation index system;
(3) set up medium and small electric network synthetic evaluation index mathematical model.
2. according to the medium and small mains supply ability described in claim l and run horizontal comprehensive estimation method, it is characterized in that: described medium and small electric network synthetic evaluation index mathematical model is as follows:
In formula
the score of k+1 layer attribute in representational level structure;
represent the
the number of straton attribute;
Model is according to analytical hierarchy process (AHP), from equipment evaluation index, technical merit evaluation index, 33 classification indicators of operation proficiency assessment index three aspects:, 62 base class indexs, every overall target score of minor scale power net assessment in calculating, count the shared weight of indices, include upper level in, finally draw comprehensive assessment score.
3. according to medium and small mains supply ability described in claim l and run horizontal comprehensive estimation method, it is characterized in that: equipment evaluation index mainly comprises:
(1) high pressure distribution equipment evaluation index comprises main transformer operation time limit index and reactive-load compensation configuring condition, and wherein main transformer operation time limit index comprises that the operation time limit exceedes 20 years main transformer ratios and the operation time limit exceedes 15 years main transformer ratios;
(2) middle voltage distribution networks equipment evaluation index comprise medium-voltage line, in be press-fitted and become and Medium voltage switch or circuit breaker evaluation index, wherein evaluate of lines index mainly comprises medium-voltage line backbone cross section situation, line insulation level, the circuit operation time limit; Distribution transforming index mainly comprises capacity of distribution transform Standardization, whether belongs to energy saving transformer, the distribution transforming operation time limit and distribution transforming information acquisition situation; Medium voltage switch or circuit breaker index mainly comprises the switchgear operation time limit, without oiling level and automatization terminal covering level.
4. according to the medium and small mains supply ability described in claim l and run horizontal comprehensive estimation method, it is characterized in that: technical merit evaluation index mainly comprises:
(1) high pressure distribution technical merit evaluation index mainly comprises substation capacity configuration index and low-voltage side outlet interval index, and wherein substation capacity configuration index comprises single main transformer ratio and the monotropic ratio of single line; Low-voltage side outlet interval index comprises 10kV outgoing line interval utilization factor and user's special line accounting;
(2) middle voltage distribution networks technical merit evaluation index comprises medium-voltage equipment situation and two aspects of networking mode, wherein equipment index mainly comprises that radius of electricity supply and circuit articulate capacity of distribution transform situation, and networking mode index mainly comprises looped network ratio, the mode of connection, segmentation situation and networking standardization etc.
5. according to the medium and small mains supply ability described in claim l and run horizontal comprehensive estimation method, it is characterized in that: operation proficiency assessment index mainly comprises:
(1) high pressure distribution operation proficiency assessment index comprises transformer station's load factor and capacity-load ratio situation, and wherein transformer station's load factor comprises the heavily loaded ratio of Substation with Heavy Load ratio and single main transformer transformer station;
(2) medium-voltage equipment index comprises line load rate index and distribution transforming load factor, and wherein line load rate index comprises circuit Rate of average load, heavy-haul line, overload circuit ratio, circuit heavy duty ratio and light-loaded circuit ratio in 3 years put into operation; Distribution transforming load factor index comprises distribution transforming Rate of average load, heavily loaded distribution transforming ratio and underloading distribution transforming ratio;
(3) load transfer ability index comprises main transformer " N-1 " verification, circuit " N-1 " verification and full cut-off verification.
6. according to the regional power grid power supply capacity described in claim 3,4,5 and run horizontal comprehensive estimation method, it is characterized in that: 66 base class index fundamental functions are all different, but be mainly linear function, trapezoidal function, the trigonometric function of by stages.
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