CN109842122A - A kind of low-voltage platform area low-voltage administering method - Google Patents
A kind of low-voltage platform area low-voltage administering method Download PDFInfo
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- CN109842122A CN109842122A CN201711203659.7A CN201711203659A CN109842122A CN 109842122 A CN109842122 A CN 109842122A CN 201711203659 A CN201711203659 A CN 201711203659A CN 109842122 A CN109842122 A CN 109842122A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The present invention relates to a kind of low-voltage platform area low-voltage administering methods, comprising the following steps: step 1: raw data acquisition: collecting platform area basic data: obtaining the monitoring data of Distribution transformer, including three-phase voltage, three-phase current from metering automation system；End monitoring point monitoring voltage；Transformer station high-voltage side bus gear；From dispatch automated system, the load monitoring data of 10kV route whole year in described area are obtained, count voltage when maximum average minimum load, active power, reactive power；The model and capacity of distribution transformer, conductor cross-section, line topological figure.Step 2 determines the low-voltage platform area with low-voltage phenomenon；Situation is acquired by above-mentioned data, obtains the platform area of low-voltage phenomenon.Step 3 judges low-voltage genetic analysis, and administer according to reason: judging the reason of generating platform area low-voltage according to platform area low-voltage parser；The reason of generating route low-voltage is judged according to 10kv circuit analysis algorithm；Output generates the measure of low-voltage.
Description
Technical field
The present invention relates to low-voltage fields, and in particular to a kind of low-voltage platform area low-voltage administering method.
Background technique
As an important indicator of power quality, quality of voltage can directly reflect what power supply department provided a user
Whether electric energy is qualified, and superiority and inferiority directly can be to user (especially Medical Devices, automation equipment, communication apparatus and computer etc.
Sensitive users) it has an immense impact on, if not taking suitable mitigation strategy, voltage disturbance will affect the normal work of these equipment
Even cause the damage of equipment.
Domestic power supply company has carried out a large amount of work in distribution network voltage quality management, but especially due to distribution
The actual conditions of user side data volume are sufficiently complex, these projects are not directed to low-voltage platform area be transformed at present, still concentrate one's energy
In medium voltage distribution network and the reactive compensation of part route etc., run in the advanced applied analysis of voltage data, reactive apparatus
Management, reactive voltage intellectual analysis and aid decision etc. are related to relatively fewer.And low-voltage platform area is 10kV power grid, distribution
Transformer, low-voltage network and the common result of load.Power supply enterprise typically simply will when finding low-voltage problem at present
Reason is classified as that transformer overload, line footpath are meticulous, excessive three reasons of radius of electricity supply, has no clearly quantitative analysis tool and side
Method.
Summary of the invention
1, technical problem to be solved:
The technical problems to be solved by the invention are just to provide a kind of low-voltage platform area low-voltage administering method, according to the side 10kV
Voltage, head end voltage deviation, terminal voltage deviation and line voltage distribution loss, calculate in discovery platform area by algorithm and exist
The position of low-voltage phenomenon, and practical low-voltage phenomenon solution is combined, a set of control measures are generated, are field personnel
Platform area is analyzed and is set up the project, effective help is provided.
2, technical solution:
A kind of low-voltage platform area low-voltage administering method, it is characterised in that: the following steps are included:
Step 1: raw data acquisition: platform area basic data is collected, comprising: from metering automation system, it is whole to obtain distribution transformer monitoring
The monitoring data at end, including three-phase voltage, three-phase current；End monitoring point monitoring voltage；Transformer station high-voltage side bus gear；Certainly from scheduling
Dynamicization system obtains the load monitoring data of 10kV route whole year in described area, counts maximum, is averaged, when minimum load
Voltage, active power, reactive power；The model and capacity of distribution transformer, conductor cross-section, line topological figure.
Step 2: the low-voltage platform area with low-voltage phenomenon is determined；Situation is acquired by above-mentioned data, has obtained low electricity
Press the platform area of phenomenon.
Step 3: judge low-voltage genetic analysis, and administer according to reason: according to platform area low-voltage parser
Judgement generates the reason of platform area low-voltage；The reason of generating route low-voltage is judged according to 10kv circuit analysis algorithm；Output produces
The measure of raw low-voltage.
The process of the low-voltage analysis of the step 3 is to model to divide respectively according to the sequence of power distribution station and 10kV route
Analysis；The following steps are included:
Step 1: according to platform area head end three-phase voltage, three-phase current, distribution transforming gear, calculating the side 10kV voltage U0, head end
Δ U12 is lost in voltage deviation U1, terminal voltage deviation U2 and line voltage distribution.
Step 2: if the side 10kV voltage U0 is not less than 9.3kV, and the Δ U12 of line voltage distribution loss at this time is not less than
10%, further distribution transforming analytic process: the distribution transforming analytic process includes following procedure.
Step 2-1: if balanced distribution transforming three-phase load, terminal voltage at this time is higher than 0.9kv, then exports " distribution transforming three-phase
It is load unbalanced " it is the reason of causing low-voltage, control measures are adjustment platform area three-phase load.
Step 2-2: if improving distribution transforming gear, terminal voltage at this time is higher than 0.9kv, then exports " distribution transforming gear is improper "
It is the reason of causing low-voltage, control measures are adjustment distribution transforming gear.
Step 2-3: if balanced distribution transforming three-phase load and improving distribution transforming gear, terminal voltage at this time is just higher than 0.9, then
" distribution gear improper and three-phase load unbalance " is the reason of causing low-voltage, and control measures are adjustment distribution transforming gear and adjustment
Platform area three-phase load.
Step 3: if the side 10kV voltage U0 is not less than 9.3kV, and line voltage distribution loss at this time is less than 10%: first at this time
Hold deviation less than 0, then successively further distribution transforming analytic process and circuit analysis process below.
The distribution transforming analytic process includes:
I) distribution transforming gear is improved, if head end deviation is not less than 0 at this time, exports " distribution transforming gear is improper ".
Ii) balanced distribution transforming three-phase load exports " distribution transforming three-phase load unbalance " if head end deviation is not less than 0 at this time.
Iii) it improves distribution transforming gear and balanced distribution transforming three-phase load exports " distribution transforming if head end deviation is not less than 0 at this time
Gear is improper and three-phase load unbalance ".
The circuit analysis process includes: iv) balanced low-voltage circuit three-phase load, if line voltage distribution loss at this time is less than
0.1, then export " three-phase load unbalance.
V) if above-mentioned condition iv) is unsatisfactory for, by 95mm2 or less conductor cross-section improve 3 grades, at this time if
Line voltage distribution loss is higher than less than 0.1, then exports " low-voltage circuit section is small ".
Vi) if above-mentioned condition v) is unsatisfactory for, by 120mm2 or more conducting wire cutover load, at this time if line voltage distribution
Loss is higher than less than 0.1, then exports " low-voltage circuit load weight ".
Vii) if above-mentioned condition vi) is unsatisfactory for, place platform area is split as 2 areas Ge Tai, at this time if line electricity
Crushing consumption is higher than less than 0.1, then exports " radius of electricity supply is long ".
The result of above-mentioned distribution transforming analytic process and circuit analysis process is merged, and exports result；
Step 4: if the side 10kV voltage U0 is not less than 9.3kV, and line voltage distribution loss at this time is less than 10%；If head end deviation
Not less than 0, then further circuit analysis process below:.
Step 4-1: balanced low-voltage circuit three-phase load exports " three-phase load injustice if terminal voltage is higher than 0.9
Weighing apparatus.
Step 4-2: improving 3 grades for 95mm2 or less conductor cross-section backbone, defeated if terminal voltage is higher than 0.9
" low-voltage circuit section is small " out.
Step 4-3: 120mm2 or more conducting wire cutover load is exported into " low-voltage circuit if terminal voltage is higher than 0.9
Load weight ".
Step 4-4:: if aforesaid way can not make terminal voltage be higher than 0.9, being split as 2 areas Ge Tai, if end electricity at this time
Pressure is higher than 0.9, then exports " radius of electricity supply is long ".
If the side 10kV voltage is less than 9.3kV in step 2 described in step 5., the side 10kV voltage is adjusted to 9.3kV, into one
Walk process below:
Step 5-1: if line voltage distribution loss is less than 10%, terminal voltage is higher than 0.9, then exporting " side 10kV low voltage " is
The main reason for causing low-voltage；
Step 5-2: if line voltage distribution loss is less than 10%, terminal voltage is not higher than 0.9, executes and matches variation as described in step 2
Analysis process；Merge the analysis of " side 10kV low voltage " and distribution transforming analytic process as a result, output is the main original for causing low-voltage
Cause.
Step 5-3: if line voltage distribution loss is greater than 10%, head end deviation is less than 0 at this time: executing and matches described in step 3
Become analytic process and circuit analysis process, and the output result of combined analysis process；If head end deviation is greater than 0 at this time: executing such as
The circuit analysis process of step 4, exports the result of analysis.
Further, the 10kv circuit analysis algorithm the following steps are included:
Step A: judge the influence of the idle voltage-to-ground of route:
Step A-1: calculating the power factor of 10kV outlet according to busy hour active power, reactive power first, if
Power factor then provides corresponding reactive power compensation system as control measures according to idle accurate second moment algorithm less than 0.9；
Step A-2: if power factor be greater than 0.9, judge each node voltage of 10kV route whether all higher than 9.3kV, if
There are lower voltage nodes, then continue to judge voltage after increasing capacitor according to route actual conditions, if whole node voltages close
Lattice are, it is concluded that reactive compensation resolution；
Step A-3: if obtaining route low-voltage there are still having node voltage lower than 9.3kV after increasing idle capacitor
It is not to be influenced by idle, carries out next 10kV circuit analysis subprocess.
Step B: line load judges voltage influence:
Step B-1: according to the power of 10kV transmission line of electricity economical transport in " the economic transmission powers of voltage electricity nets at different levels " and
Peak load in route is compared, and is caused node voltage lower than 9.3kV if load is excessive, is determined that low-voltage is drawn by load
It rises, and provides parallel powering or load changes and cuts control measures；
Step B-2: if load, within the scope of economic transmission capacity, voltage is caused by load is excessive, then enter lower step
Rapid C.
Step C: radius of electricity supply judges voltage influence:
Step C-1: the peak load, average load, minimum load for increasing route in circuit emulation carry out sharing calculating or fine equally
It calculates, determines whether each node voltage of route is lower than 9.3kV, whether radius of electricity supply meets 4-15 as defined in directive/guide kilometers, if
Ungratified judgement low-voltage is caused by radius of electricity supply is too long, provides increase route pressure regulator or newly-built power supply point is solution party
Method；
Step C-2: it is lower than 9.3kV if there is node voltage, radius of electricity supply meets 4-15 as defined in directive/guide kilometers, and entrance is next
A circuit analysis subprocess.
Step D: line conductor judges voltage influence:
By simulated line node, there are voltages to be lower than 9.3kV, traverses each section lead, judges whether the load of its first and last section surpasses
The corresponding maximum economical operation load of its sectional area is crossed；
Step D-1: if having exceeded maximum economical operation load, conducting wire is needed to change, is usually changed to trunk cross-sectional area
185mm2, branch cross-sectional area are changed to 120mm2；
Step D-2: recalculating after restringing, checks each node voltage whether all in 9.3kV or more, if each node voltage
In 9.3kV or more, then low-voltage is since pressure drop caused by wire diameter is too small causes greatly, and control measures are restringings；
Step D-3: if being still then lower than the node of 9.3kV, using the scheme that subprocess above is combined to improvement, until
Voltage is qualified.
3, the utility model has the advantages that
The present invention calculates by algorithm according to head end voltage of courts, terminal voltage and voltage loss and finds that there are low in platform area
The position of voltage phenomenon generates the best intelligent control measures of a set of economy, is in conjunction with practical low-voltage phenomenon solution
Field personnel analyzes and sets up the project to platform area, provides effective help.
Detailed description of the invention
Fig. 1 is the flow chart that low-voltage is administered in the present invention；
Fig. 2 is that low-voltage analyzes main flow chart in the present invention；
Fig. 3 is the distribution transforming analytic process in the present invention；
Fig. 4 is the circuit analysis process in the present invention.
Specific embodiment
The present invention will be described with reference to the accompanying drawing.
By attached drawing it can be seen that the present invention is by the survey voltage to platform area, first terminal voltage and voltage loss propose one kind
Low-voltage platform area low-voltage administering method including raw data acquisition, determines the low-voltage platform area with low-voltage phenomenon, judgement
Low-voltage genetic analysis.
If attached drawing 1 is main flow chart of the invention, including process below: step 1: according to platform area head end three-phase voltage,
Three-phase current, distribution transforming gear calculate the side 10kV voltage U0, head end voltage deviation U1, terminal voltage deviation U2 and route
Voltage loss Δ U12.
Step 2: if the side 10kV voltage U0 is not less than 9.3kV, and the Δ U12 of line voltage distribution loss at this time is not less than
10%, further distribution transforming analytic process as shown in Fig. 2: the distribution transforming analytic process includes following procedure.
Step 2-1: if balanced distribution transforming three-phase load, terminal voltage at this time is higher than 0.9kv, then exports " distribution transforming three-phase
It is load unbalanced " it is the reason of causing low-voltage, control measures are adjustment platform area three-phase load.
Step 2-2: if improving distribution transforming gear, terminal voltage at this time is higher than 0.9kv, then exports " distribution transforming gear is improper "
It is the reason of causing low-voltage, control measures are adjustment distribution transforming gear.
Step 2-3: if balanced distribution transforming three-phase load and improving distribution transforming gear, terminal voltage at this time is just higher than 0.9, then
" distribution gear improper and three-phase load unbalance " is the reason of causing low-voltage, and control measures are adjustment distribution transforming gear and adjustment
Platform area three-phase load.
Step 3: if the side 10kV voltage U0 is not less than 9.3kV, and line voltage distribution loss at this time is less than 10%: first at this time
Hold deviation less than 0, then successively further distribution transforming analytic process as shown in Fig. 2 below and attached circuit analysis shown in Fig. 3
Process.
As the distribution transforming analytic process of attached drawing 2 includes:
I) distribution transforming gear is improved, if head end deviation is not less than 0 at this time, exports " distribution transforming gear is improper ".
Ii) balanced distribution transforming three-phase load exports " distribution transforming three-phase load unbalance " if head end deviation is not less than 0 at this time.
Iii) it improves distribution transforming gear and balanced distribution transforming three-phase load exports " distribution transforming if head end deviation is not less than 0 at this time
Gear is improper and three-phase load unbalance ".
The circuit analysis process includes:
Iv) balanced low-voltage circuit three-phase load, if line voltage distribution loss at this time exports " three-phase load unbalance less than 0.1.
V) if above-mentioned condition iv) is unsatisfactory for, by 95mm2 or less conductor cross-section improve 3 grades, at this time if
Line voltage distribution loss is higher than less than 0.1, then exports " low-voltage circuit section is small ".
Vi) if above-mentioned condition v) is unsatisfactory for, by 120mm2 or more conducting wire cutover load, at this time if line voltage distribution
Loss is higher than less than 0.1, then exports " low-voltage circuit load weight ".
Vii) if above-mentioned condition vi) is unsatisfactory for, place platform area is split as 2 areas Ge Tai, at this time if line electricity
Crushing consumption is higher than less than 0.1, then exports " radius of electricity supply is long ".
The result of above-mentioned distribution transforming analytic process and circuit analysis process is merged, and exports result；
Step 4: if the side 10kV voltage U0 is not less than 9.3kV, and line voltage distribution loss at this time is less than 10%；If head end deviation
Not less than 0, then further circuit analysis process as shown in Fig. 3 below:.
Step 4-1: balanced low-voltage circuit three-phase load exports " three-phase load injustice if terminal voltage is higher than 0.9
Weighing apparatus.
Step 4-2: improving 3 grades for 95mm2 or less conductor cross-section backbone, defeated if terminal voltage is higher than 0.9
" low-voltage circuit section is small " out.
Step 4-3: 120mm2 or more conducting wire cutover load is exported into " low-voltage circuit if terminal voltage is higher than 0.9
Load weight ".
Step 4-4:: if aforesaid way can not make terminal voltage be higher than 0.9, being split as 2 areas Ge Tai, if end electricity at this time
Pressure is higher than 0.9, then exports " radius of electricity supply is long ".
If the side 10kV voltage is less than 9.3kV in step 2 described in step 5., the side 10kV voltage is adjusted to 9.3kV, into one
Walk process below:
Step 5-1: if line voltage distribution loss is less than 10%, terminal voltage is higher than 0.9, then exporting " side 10kV low voltage " is
The main reason for causing low-voltage；
Step 5-2: if line voltage distribution loss is less than 10%, terminal voltage is not higher than 0.9, executes and matches variation as described in step 2
Analysis process；Merge the analysis of " side 10kV low voltage " and distribution transforming analytic process as a result, output is the main original for causing low-voltage
Cause.
Step 5-3: if line voltage distribution loss is greater than 10%, head end deviation is less than 0 at this time: executing and matches described in step 3
Become analytic process and circuit analysis process, and the output result of combined analysis process；If head end deviation is greater than 0 at this time: executing such as
The circuit analysis process of step 4, exports the result of analysis.
Further, the 10kv circuit analysis algorithm the following steps are included:
Step A: judge the influence of the idle voltage-to-ground of route:
Step A-1: calculating the power factor of 10kV outlet according to busy hour active power, reactive power first, if
Power factor then provides corresponding reactive power compensation system as control measures according to idle accurate second moment algorithm less than 0.9；
Step A-2: if power factor be greater than 0.9, judge each node voltage of 10kV route whether all higher than 9.3kV, if
There are lower voltage nodes, then continue to judge voltage after increasing capacitor according to route actual conditions, if whole node voltages close
Lattice are, it is concluded that reactive compensation resolution；
Step A-3: if obtaining route low-voltage there are still having node voltage lower than 9.3kV after increasing idle capacitor
It is not to be influenced by idle, carries out next 10kV circuit analysis subprocess.
Step B: line load judges voltage influence: according to 10kV in " the economic transmission powers of voltage electricity nets at different levels "
Peak load in the power and route of transmission line of electricity economical transport is compared, and causes node voltage to be lower than if load is excessive
9.3kV determines that low-voltage is caused by load, and provides parallel powering or load changes and cuts control measures.If load is economical defeated
It send within range of capacity, voltage is caused by load is excessive, then enters lower step.
Step C: radius of electricity supply judges voltage influence: increasing the peak load of route, average load, most in circuit emulation
Smaller load carries out sharing calculating or Exact calculation equally, determines whether each node voltage of route is lower than 9.3kV, and whether radius of electricity supply meets
It 4-15 as defined in directive/guide kilometers, if ungratified judgement low-voltage is caused by radius of electricity supply is too long, provides and increases route pressure regulation
Device or newly-built power supply point are solutions；It is lower than 9.3kV if there is node voltage, radius of electricity supply meets 4-15 as defined in directive/guide
Kilometer, into next circuit analysis subprocess.
Step D: line conductor judges voltage influence: by simulated line node, there are voltages to be lower than 9.3kV, and traversal is every
One section lead judges whether the load of its first and last section has been more than the corresponding maximum economical operation load of its sectional area；If exceeded
Maximum economical operation load, then need to change conducting wire, trunk cross-sectional area be usually changed to 185mm2, branch cross-sectional area is changed to
120mm²；It is recalculated after restringing, checks each node voltage whether all in 9.3kV or more, if each node voltage exists
9.3kV or more, then low-voltage is since pressure drop caused by wire diameter is too small causes greatly, and control measures are restringings；If still
Then it is lower than the node of 9.3kV, then using the scheme that subprocess above is combined to improvement, until voltage qualification.
Although the present invention has been described by way of example and in terms of the preferred embodiments, they be not it is for the purpose of limiting the invention, it is any ripe
This those skilled in the art is practised, without departing from the spirit and scope of the invention, can make various changes or retouch from working as, therefore guarantor of the invention
Shield range should be subject to what claims hereof protection scope was defined.
Claims (3)
1. a kind of low-voltage platform area low-voltage administering method, it is characterised in that: the following steps are included:
Step 1: raw data acquisition:
Collect platform area basic data, comprising:
From metering automation system, the monitoring data of Distribution transformer, including three-phase voltage, three-phase current are obtained；End prison
Measuring point monitoring voltage；Transformer station high-voltage side bus gear；
From dispatch automated system, the load monitoring data of 10kV route whole year in described area are obtained, maximum is counted, put down
, voltage when minimum load, active power, reactive power；The model and capacity of distribution transformer, conductor cross-section, route are opened up
Flutter figure；
Step 2: the low-voltage platform area with low-voltage phenomenon is determined；
Situation is acquired by above-mentioned data, obtains the platform area of low-voltage phenomenon
Step 3: judge low-voltage genetic analysis, and administer according to reason:
The reason of generating platform area low-voltage is judged according to platform area low-voltage parser；
The reason of generating route low-voltage is judged according to 10kv circuit analysis algorithm；
Output generates the measure of low-voltage.
2. a kind of low-voltage platform area according to claim 1 low-voltage administering method, it is characterized in that:
The process of the low-voltage analysis of the step 3 is to distinguish modeling analysis according to the sequence of power distribution station and 10kV route；Packet
Include following steps:
Step 1: according to platform area head end three-phase voltage, three-phase current, distribution transforming gear, calculating the side 10kV voltage U0, head end
Δ U12 is lost in voltage deviation U1, terminal voltage deviation U2 and line voltage distribution；
Step 2: if the side 10kV voltage U0 is not less than 9.3kV, and the Δ U12 of line voltage distribution loss at this time is not less than 10%, into
One step distribution transforming analytic process: the distribution transforming analytic process includes following procedure:
Step 2-1: if balanced distribution transforming three-phase load, terminal voltage at this time is higher than 0.9kv, then exports " distribution transforming three-phase load
It is uneven " it is the reason of causing low-voltage, control measures are adjustment platform area three-phase load；
Step 2-2: if improving distribution transforming gear, terminal voltage at this time is higher than 0.9kv, then exporting " distribution transforming gear is improper " is to make
The reason of at low-voltage, control measures are adjustment distribution transforming gear；
Step 2-3: if balanced distribution transforming three-phase load and improving distribution transforming gear, terminal voltage at this time is just higher than 0.9, then " matches
Electric gear is improper and three-phase load unbalance " it is the reason of causing low-voltage, control measures are adjustment distribution transforming gear and adjustment platform
Area's three-phase load；
Step 3: if the side 10kV voltage U0 is not less than 9.3kV, and line voltage distribution loss at this time is less than 10%: head end is inclined at this time
Difference less than 0, then successively further distribution transforming analytic process and circuit analysis process below:
The distribution transforming analytic process includes:
I) distribution transforming gear is improved, if head end deviation is not less than 0 at this time, exports " distribution transforming gear is improper "；
Ii) balanced distribution transforming three-phase load exports " distribution transforming three-phase load unbalance " if head end deviation is not less than 0 at this time；
Iii) it improves distribution transforming gear and balanced distribution transforming three-phase load exports " distribution transforming gear if head end deviation is not less than 0 at this time
Improper and three-phase load unbalance "；
The circuit analysis process includes:
Iv) balanced low-voltage circuit three-phase load, if line voltage distribution loss at this time exports " three-phase load unbalance less than 0.1；
V) if above-mentioned condition iv) is unsatisfactory for, 95mm2 or less conductor cross-section is improved into 3 grades, at this time if route
Voltage loss is higher than less than 0.1, then exports " low-voltage circuit section is small "；
Vi) if above-mentioned condition v) is unsatisfactory for, by 120mm2 or more conducting wire cutover load, at this time if line voltage distribution is lost
Higher than less than 0.1, then exporting " low-voltage circuit load weight "；
Vii) if above-mentioned condition vi) is unsatisfactory for, place platform area is split as 2 areas Ge Tai, at this time if line electricity crushing
Consumption is higher than less than 0.1, then exports " radius of electricity supply is long "；
The result of above-mentioned distribution transforming analytic process and circuit analysis process is merged, and exports result；
Step 4: if the side 10kV voltage U0 is not less than 9.3kV, and line voltage distribution loss at this time is less than 10%；If head end deviation
Not less than 0, then further circuit analysis process below::
Step 4-1: balanced low-voltage circuit three-phase load exports " three-phase load unbalance if terminal voltage is higher than 0.9；
Step 4-2: 95mm2 or less conductor cross-section backbone is improved into 3 grades, if terminal voltage is higher than 0.9, is exported
" low-voltage circuit section is small "；
Step 4-3: by 120mm2 or more conducting wire cutover load, if terminal voltage is higher than 0.9, " low-voltage circuit load is exported
Weight "；
Step 4-4:: if aforesaid way can not make terminal voltage be higher than 0.9, being split as 2 areas Ge Tai, if terminal voltage is high at this time
In 0.9, then " radius of electricity supply is long " is exported；
If the side 10kV voltage is less than 9.3kV in step 2 described in step 5., the side 10kV voltage is adjusted to 9.3kV, further
Process below:
Step 5-1: if line voltage distribution loss is less than 10%, terminal voltage is higher than 0.9, then exporting " side 10kV low voltage " is
The main reason for causing low-voltage；
Step 5-2: if line voltage distribution loss is less than 10%, terminal voltage is not higher than 0.9, executes and matches variation as described in step 2
Analysis process；Merge the analysis of " side 10kV low voltage " and distribution transforming analytic process as a result, output is the main original for causing low-voltage
Cause；
Step 5-3: if line voltage distribution loss is greater than 10%, head end deviation is less than 0 at this time: executing and matches variation described in step 3
Analysis process and circuit analysis process, and the output result of combined analysis process；If head end deviation is greater than 0 at this time: executing such as step 4
Circuit analysis process, export the result of analysis.
3. a kind of low-voltage platform area according to claim 1 low-voltage administering method, it is characterized in that: the 10kv route point
Analyse algorithm the following steps are included:
Step A: judge the idle influence to low-voltage of route
Step A-1: calculating the power factor of 10kV outlet according to busy hour active power, reactive power first, if
Power factor then provides corresponding reactive power compensation system as control measures according to idle accurate second moment algorithm less than 0.9；
Step A-2: if power factor be greater than 0.9, judge each node voltage of 10kV route whether all higher than 9.3kV, if
There are lower voltage nodes, then continue to judge voltage after increasing capacitor according to route actual conditions, if whole node voltages close
Lattice are, it is concluded that reactive compensation resolution；
Step A-3: if obtaining route low-voltage there are still having node voltage lower than 9.3kV after increasing idle capacitor
It is not to be influenced by idle, carries out next 10kV circuit analysis subprocess；
Step B: line load judges voltage influence:
Step B-1: according to the power of 10kV transmission line of electricity economical transport in " the economic transmission powers of voltage electricity nets at different levels " and
Peak load in route is compared, and is caused node voltage lower than 9.3kV if load is excessive, is determined that low-voltage is drawn by load
It rises, and provides parallel powering or load changes and cuts control measures；
Step B-2: if load, within the scope of economic transmission capacity, voltage is caused by load is excessive, then enter lower step
Rapid C；
Step C: radius of electricity supply judges voltage influence:
Step C-1: the peak load, average load, minimum load for increasing route in circuit emulation carry out sharing calculating or fine equally
It calculates, determines whether each node voltage of route is lower than 9.3kV, whether radius of electricity supply meets 4-15 as defined in directive/guide kilometers, if
Ungratified judgement low-voltage is caused by radius of electricity supply is too long, provides increase route pressure regulator or newly-built power supply point is solution party
Method；
Step C-2: it is lower than 9.3kV if there is node voltage, radius of electricity supply meets 4-15 as defined in directive/guide kilometers, and entrance is next
A circuit analysis subprocess；
Step D: line conductor judges voltage influence:
By simulated line node, there are voltages to be lower than 9.3kV, traverses each section lead, judges whether the load of its first and last section surpasses
The corresponding maximum economical operation load of its sectional area is crossed；
Step D-1: if having exceeded maximum economical operation load, conducting wire is needed to change, is usually changed to trunk cross-sectional area
185mm2, branch cross-sectional area are changed to 120mm2；
Step D-2: recalculating after restringing, checks each node voltage whether all in 9.3kV or more, if each node voltage
In 9.3kV or more, then low-voltage is since pressure drop caused by wire diameter is too small causes greatly, and control measures are restringings；
Step D-3: if being still then lower than the node of 9.3kV, using the scheme that subprocess above is combined to improvement, until
Voltage is qualified.
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