CN104505833A - Method for automatically controlling load capacity of transformer - Google Patents
Method for automatically controlling load capacity of transformer Download PDFInfo
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- CN104505833A CN104505833A CN201510038060.7A CN201510038060A CN104505833A CN 104505833 A CN104505833 A CN 104505833A CN 201510038060 A CN201510038060 A CN 201510038060A CN 104505833 A CN104505833 A CN 104505833A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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Abstract
The invention provides a method for automatically controlling a load capacity of a transformer. The aims of reducing the electric energy consumption of the transformer and improving a power factor of a power supply side to the greatest extent are realized aiming at an automatic optical configuration scheme provided under the condition that a power distribution room is internally provided with two, three or four transformers on the basis of ensuring that the operation of the transformer is safe and the transmission electric quantity meets the production requirements through technical measures of preferentially selecting the optimal operation manner of he transformer, optimizing the load adjustment, optimally combining the operation positions of the transformers, improving the operation conditions of the transformer and the like. The essence of economic operation of the transformer is the energy-saving operation of the transformer under the technological economy allowable conditions.
Description
Technical field
The present invention relates to field of power, specifically be a kind of method that transformer load capacity controls automatically.
Background technology
Its development that automation covers comprehensively has been realized for generation current, major network power transmission and transformation, the percent of automatization of the distribution line between said two devices but only less than 10% level, seriously hinder the raising of power supply reliability and fail safe, along with the development of grid automation, distribution automation becomes one of the function in the urgent need to realizing already.
The basis realizing distribution automation is the power distribution automation realizing power distribution room, in distribution operation, electric energy sends to user's average time five transformations, and distribution transformer is the important main equipment of electric power system, its incredible amount, and National Power System gross generation more than 10% all loss is on the transformer.And along with the fast development of urbanization process, the transformer capacity of the power distribution room of a large amount of newly-built community is all design by saturated power consumption in future, a power distribution room is generally furnished with 2,3 even 4 transformers, but from move in and reach saturated power consumption, this intermediate demand considerable time; And in power load with the large area of seasonal move, the time period that load is less may not need to drop into whole transformers and just can not satisfy the demands, and other transformer may be the state being in zero load or stoppage in transit, considerably increase the loss of transformer loss and supply line; Reduce mains side power factor (PF); Shorten again effective service life of transformer simultaneously.Concrete, for a power distribution room 2 1000KVA transformers, conventional SC (B) 10 type, 11 type 10kV levels are dry becomes transformer, and only no-load loss (iron loss) power reaches 1795W, year iron loss electricity reach 15724 degree.Further, the transformer load volume controlled of prior art needs dependence manually to drop into and exit transformer to realize, and there is inefficient and regulation and control problem not in time.
Prior art is equally at the effective ways that the searching of constantly making great efforts solves the problem, if application number is 201110251476.9, name is called the patent document of " a kind of distribution transformer economy operation criterion algorithm system ", constraints is run by building two station power distribution transformer economic securities, for the purpose of transformer operation power loss is minimum, introduce fluctuation of load coefficient and do dynamic calculation, and the constraints of result of calculation and structure is compared and revises, to obtain transformer economic operation pattern parameter criterion and transformer switching opportunity, realize the basis for estimation of transformer economic operation.But above-mentioned patent document is only the optimal mode of the transformer economic operation being calculated two by pure theory, do not relate to the autocontrol method and the system that specifically how automatically to drop into and exit transformer, or cannot solve the problems of the technologies described above, therefore, be necessary a kind of method providing transformer load capacity automatically to control, to solve the problem.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of method that transformer load capacity controls automatically, for reducing the electric energy loss of transformer and the loss of supply line, improves mains side power factor (PF), extends transformer service life, improve social efficiency.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is:
The method that transformer load capacity controls automatically, is configured with two transformers in power distribution room, form dual transformer when two transformers run simultaneously;
Preset first and judge that the cycle and second judges the cycle, the described first judgement cycle was shorter than for the second judgement cycle;
The power load capacity of operating transformer is detected in real time;
During the preset percentage of the power load capacity when only single transformer runs all the time less than or equal to the rated load capacity of another transformer within the first judgement cycle; Then automatically switch to another transformer described to run;
When power load capacity when only single transformer runs is more than or equal to the preset percentage of self rated load capacity all the time within the first judgement cycle; Then automatically drop into another transformer to run, composition dual transformer;
During the preset percentage of the total power load capacity when two transformers run simultaneously all the time lower than the wherein rated load capacity of a transformer within the second judgement cycle; Then automatically exit another transformer.
Another technical scheme provided by the invention is:
The method that transformer load capacity controls automatically, is configured with three transformers in power distribution room, form dual transformer simultaneously, form three transformers when three transformers run simultaneously when two transformers run; Preset the judgement cycle;
The power load capacity of operating transformer is detected in real time;
During the preset percentage of the power load capacity when only single transformer runs or only two transformers run all the time greater than or equal to the rated load capacity of self single transformer or self two transformer within the judgement cycle, then automatically switch to the single transformer of the power load capacity requirement meeting transformer in current operation, two transformers or three transformers and run;
When preset percentage all the time lower than any two transformers or the rated load capacity of single transformer arbitrarily within the judgement cycle of total power load capacity of operating three transformers, then automatically switch to two transformers meeting transformer power load capacity requirement in current operation and to run or single transformer runs simultaneously.
Beneficial effect of the present invention is: be different from the transformer configured in the power distribution room of prior art and lack effective optimized running allocation plan, in power distribution room, some transformer is often in zero load or shut down condition, and some transformer is owing to being in running status for a long time, thus cause the electric energy loss of transformer greatly to promote, shorten effective service life, the problem such as the loss of power circuit also increases.The present invention is directed to the difference of institute's configuration transformer number of units in power distribution room, adopt the different automatic regulation of optimized running allocation plan realization to running state of transformer in power distribution room, have the following advantages:
1, effectively reduce the electric energy loss of transformer, extend the service life of transformer; According to the rotation of transformer in optimized running scheme automatic control distribution room, increase and throw or subtract the row that puts into operation, avoid the long-time high load capacity running of single transformer, decrease the loss of transformer in power distribution room as much as possible;
2, the loss of power circuit is lowered; By optimizing the operation configuration of transformer in power distribution room, realize effectively reducing by the no-load loss of the initial power circuit of transformer output lines and iron loss;
3, realize the Automatic Control to power distribution room transformer, reduction human input, improves the automation control system of power distribution room;
4, there is good returns of investment and social benefit; If large scale investment uses, will significantly reduce the loss of supply line, there is significant energy-saving effect, and then there is good returns of investment and social benefit.
Accompanying drawing explanation
Fig. 1 is the transformer configuration schematic diagram of the embodiment one of the method that a kind of transformer load capacity of the present invention controls automatically;
Fig. 2 is the transformer configuration schematic diagram of the embodiment two of the method that a kind of transformer load capacity of the present invention controls automatically;
Fig. 3 is the configuration schematic diagram of four transformers in power distribution room in the method that automatically controls of a kind of transformer load capacity of the present invention.
Embodiment
By describing technology contents of the present invention in detail, realized object and effect, accompanying drawing is coordinated to be explained below in conjunction with execution mode.
The design of most critical of the present invention is: using the actual power load capacity of transformer as basis for estimation, the operational mode of transformer in Automated condtrol power distribution room, realizes the economical operation of transformer.
Please refer to Fig. 1 to 3, the invention provides a kind of method that transformer load capacity controls automatically, in power distribution room, be configured with two transformers, when two transformers run, form dual transformer simultaneously;
Preset first and judge that the cycle and second judges the cycle, the described first judgement cycle was shorter than for the second judgement cycle;
The power load capacity of operating transformer is detected in real time;
When preset percentage all the time less than or equal to the rated load capacity of another transformer within the first judgement cycle of the power load capacity of single transformer; Then automatically switch to another transformer described to run;
When the power load capacity of single transformer is more than or equal to the preset percentage of self rated load capacity all the time within the first judgement cycle; Then automatically drop into another transformer to run, composition dual transformer;
During the preset percentage of the total power load capacity when two transformers run simultaneously all the time lower than the wherein rated load capacity of a transformer within the second judgement cycle; Then automatically exit another transformer.
From foregoing description, beneficial effect of the present invention is: the method that a kind of transformer load capacity of the present invention controls automatically, for the situation being configured with two transformers in power distribution room, by detecting in real time the power load capacity of operating single transformer or dual stage transformer, when certain proportion for a long time lower than single transformer rated capacity of the power load of required transformer, only drop into a transformer, and automatic alternate at set intervals; Automatically next transformer is dropped into when power load reaches certain value; When multiple stage transformer runs simultaneously, realize automatically exiting transformer according to the situation of actual power load and run.The present invention can effectively prevent transformer to be in zero load or stoppage in transit or excess load operating state for a long time, significantly reduces the electric energy loss of transformer, and then extends the Acceptable life of transformer; The most important thing is to achieve unmanned automatic control, make transformer automatic operating in allocation optimum state.
It should be noted that, the transformer load capacity automatic control system obtained is derived by transformer load capacity autocontrol method of the present invention, state on the basis of the concrete operations of method in realization, further provided with power distribution room automatic monitored control system, can to the ambient temperature of power distribution room, humidity, cigarette sense, mobile object and gate control system, transformer temperature etc. carry out examinations, further realize the automation control system of power distribution room.
Further, also comprise: during the preset percentage of total power load capacity when two transformers run simultaneously all the time lower than the rated load capacity of arbitrary transformer within the second judgement cycle; Then automatically exit the transformer put into operation at first.
Seen from the above description, in autocontrol method of the present invention, meet if detect simultaneously switch or drop into or the transformer of exit criteria has more than two time, employing is dropped at first and exits at first, exit the principle dropped into the latest at first and allocate, thus realize multiple stage transformer and be in optimized running state as much as possible, and the loss produced is minimum.
Further, described judgement ratio is 70-95%; First judgement cycle was 60-90 minute; The described second judgement cycle is 15-30 hour.
Preferably, judgement ratio be 85%; First judgement cycle was 60 minutes, and the second judgement cycle was 24 hours.
Further, single transformer runs to switch to when another transformer runs and is specially:
Automatic control switch cabinet to close the high voltage side lead-in switch of the transformer that will switch and low-pressure side main transformer switch according to sequencing; Low-pressure side main transformer switch and the high voltage side lead-in switch of the transformer of current operation is disconnected according to sequencing;
Described " automatically dropping into another transformer to run, composition dual transformer " is specially:
Automatic control switch cabinet to close the high voltage side lead-in switch of the transformer that will drop into and low-pressure side main transformer switch according to sequencing; Disconnect the low-pressure side bus interconnection switch of the transformer previously run;
Two transformer operations are exited a wherein transformer and are specially:
Automatic control switch cabinet closes the mother of two transformers; Automatically low-pressure side main transformer switch and the high voltage side lead-in switch of wanted transformer out of service is disconnected according to sequencing.
Seen from the above description, the control method of transformer load capacity of the present invention by with the coordinating of switch cubicle, automatically gather the on off state of each transformer, the basis ensureing transformer switch safety realize the switching of the on off state of transformer.
It should be noted that, power distribution room installs the automation special arrangement realizing transformer load capacity and automatically control, and its control command is transmitted by signal wiring, does not also need to rely on long-haul reliable communication, comparatively speaking more safely with reliable.
Automation special arrangement can also drop at any time as required and exit, and debugging and operation are conveniently.In addition, when possessing SCADA system (data acquisition and supervisor control) condition, result report SCADA main website.
Comprehensive power distribution monitoring basis realizes the running optimizatin of power distribution room transformer simultaneously, had both realized the intellectuality of power distribution room, and reached again effect of saving energy and decreasing loss.
Further, two groups of above-mentioned dual transformers are comprised.
The power distribution room of four transformer situations can be treated by 2 dual transformer power distribution rooms.Four transformer power distribution rooms, need installation two transformer running optimizatin automation equipments, each automation equipment manages the running optimizatin of two transformers.
Another technical scheme provided by the invention is:
The method that transformer load capacity controls automatically, is configured with three transformers in power distribution room, form dual transformer simultaneously, form three transformers when three transformers run simultaneously when two transformers run; Preset the judgement cycle;
The power load capacity of operating transformer is detected in real time;
During the preset percentage of the power load capacity when only single transformer runs or only two transformers run all the time greater than or equal to the rated load capacity of self single transformer or self two transformer within the judgement cycle, then automatically switch to the single transformer of the power load capacity requirement meeting transformer in current operation, two transformers or three transformers and run;
When preset percentage all the time lower than any two transformers or the rated load capacity of single transformer arbitrarily within the judgement cycle of total power load capacity of operating three transformers, then automatically switch to two transformers meeting transformer power load capacity requirement in current operation and to run or single transformer runs simultaneously.
From foregoing description, beneficial effect of the present invention is: the method that transformer load capacity of the present invention controls automatically is the automation allocation plan for proposing when being configured with three or four transformers in power distribution room, transformer economic operation of the present invention is guaranteeing that transformer safety is run, transmission electricity meets on the basis of production requirement, making full use of existing equipment, under the condition that equipment investment is little, by preferentially choosing the optimum operating mode of transformer, the optimization of adjustment of load, the best of breed of transformer run location and improve the technical measures such as transformer service conditions, reach the electric energy loss reducing transformer to greatest extent and the object improving mains side power factor.The essence of transformer economic operation is exactly the transformer power-saving running under Technological Economy enabled condition.
It should be noted that, namely the described power load capacity requirement meeting transformer in current operation can meet the total of the current transformer be in running status and use load capacity demand, and transformer can not be caused to occur the situation of the safety problems such as fully loaded, excess load.
Further, the judgement handoff procedure for single transformer specifically comprises:
Power load capacity when only single transformer runs within the judgement cycle all the time less than or equal to when being in the preset percentage of rated load capacity of single transformer of non-operating state; The single transformer being in non-operating state described in then automatically switching to runs;
When power load capacity when only single transformer runs is more than or equal to the preset percentage of self rated load capacity all the time within the judgement cycle; Then automatically drop into the single transformer being in non-operating state to run, composition dual transformer.
Further, the judgement handoff procedure simultaneously run for two transformers specifically comprises:
During the preset percentage of the total power load capacity when only two transformers run all the time less than or equal to total rated load capacity of the single transformer and operating single transformer that are in non-operating state within the judgement cycle; The single transformer of non-operating state is in described in then automatically dropping into; And exit another transformer be originally in running status to run;
During the preset percentage of the total power load capacity when only two transformers run all the time less than or equal to the rated load capacity of any single transformer within the judgement cycle; Then automatically switch to described single transformer to run;
During the preset percentage of the total power load capacity when only two transformers run all the time greater than or equal to the rated load capacity of self within the judgement cycle; Then automatically drop into the transformer being in non-operating state to run.
Further, judgement handoff procedure when simultaneously running for three transformers specifically comprises:
When preset percentage all the time lower than described two transformers wherein rated load capacity of a transformer within the judgement cycle of total power load capacity of two transformers in operating three transformers; Then automatically switch to the dual transformer be made up of described transformer and the single transformer being in non-operating state to run.
Seen from the above description, the present invention mainly carries out based on following main points the Automated condtrol of transformer:
1, transformer is rotated operation: when power load is for a long time lower than single transformer setting capacity, only drops into a transformer and run, another transformer and every automatic alternate at regular intervals puts into operation;
2, transformer increases throwing: when power load reaches certain value, automatically drop into next transformer;
3, transformer subtracts throwing: when multiple stage transformer runs simultaneously, when power load is for a long time lower than certain value, automatically exits a transformer.
Further, when to meet the transformer that will drop into or switch be more than two, automatically put into operation according to first exiting first the commitment principle;
Described judgement ratio is 70-95%; The described judgement cycle is 60-1200 minute.
Preferred described judgement ratio is 85%, and the described judgement cycle comprises 660 minutes the first judgement cycles and 24 hours the second judgement cycles, carries out adopting for the first judgement cycle when detection judges to single phase transformer; Carry out adopting for the second judgement cycle when detection judges to dual transformer or three transformers.
Preferably, transformer drops into, produces alarm in time, reminder announced dispatcher when exiting; Support that local/remote drops into or exits transformer Automatic Optimal operation function; During manual intervention operation, automatic blocking transformer Automatic Optimal operation function.
Transformer load capacity autocontrol method of the present invention, by the Real-Time Monitoring to transformer actual load, automatically complete the rotation operation of transformer, the increasing of transformer is thrown, subtract and throw control, decrease the transformer loss of community power distribution room as far as possible, extend transformer life, particularly for newly-built community, there is significant energy-saving effect.Realize, to the real-time monitoring of the main switch of power distribution room, realizing the automation of power distribution room, reaching the function of remote monitoring simultaneously.
In a word, the investment of power distribution room transformer load capacity automatic control system is little, and power savings is obvious, applies future vast.
It should be noted that, in electric power system, transformer load capacity=former limit input voltage × primary current × power factor (PF), because input voltage and power factor (PF) are relative changeless concerning same transformer, therefore, the change of transformer load capacity can be considered the change of electric current, directly determines the load capacity of transformer in embodiment one and two with main transformer three-phase current maximum.
Please refer to Fig. 1, embodiments of the invention one are:
A kind of dual transformer running optimizatin control strategy is provided, namely in power distribution room, is configured with the situation of two transformers simultaneously.
(1) control strategy of single phase transformer rotation operation
When main transformer three-phase current maximum (the N minute sliding window values of electric current, N is configurable) continuously certain proportion (as 85%) of regular hour (as 60 days) lower than arbitrary single transformer rated current time, automatically switch to another transformer and run.
Transfer sequence: another high voltage side of transformer service entrance switch that closes, another step down side main transformer switch that closes, disconnect the step down side main transformer switch of current operation, disconnect the high voltage side of transformer service entrance switch of current operation.
(2) single phase transformer runs the control strategy being switched to dual transformer and running
When main transformer three-phase current maximum (the N minute sliding window values of electric current, N is configurable), the regular hour (as 60 minutes) reaches the certain proportion (as 85%) of this transformer rated current continuously, drops into another transformer.
Ordering in launching: another high voltage side of transformer service entrance switch that closes, another step down side main transformer switch that closes, disconnection low-pressure side bus interconnection switch.
(3) dual transformer runs the control strategy being switched to single phase transformer and running
When two maximum phase-splittings of transformer always add electric current (the N minute sliding window values of electric current, N is configurable) continuously certain proportion (as 85%) of regular hour (as 24 hours) lower than certain single transformer rated current time, automatically exit another transformer; During certain proportion (as 85%) lower than any single transformer rated current, automatically exit the transformer dropped in advance.
Transfer sequence: mother of first closing; Disconnect the high voltage side of transformer service entrance switch needing step down side main transformer switch out of service, disconnection needs out of service successively.
Please refer to Fig. 2, embodiments of the invention two are:
A kind of three transformer running optimizatin control strategies are provided, namely in power distribution room, are configured with the situation of three transformers simultaneously.
(1) control strategy of single phase transformer rotation operation
When main transformer three-phase current maximum (the N minute sliding window values of electric current, N is configurable) continuously certain proportion (as 85%) of regular hour (as 60 days) lower than non-operating state transformer rated current time, automatically switch to this transformer and run;
During certain proportion (as 85%) lower than any single transformer rated current, automatically switch to another transformer exited at first and run.
Transfer sequence: close prepare to drop into high voltage side of transformer service entrance switch, close prepare to drop into step down side main transformer switch, disconnect the step down side main transformer switch of current operation, disconnect the high voltage side of transformer service entrance switch of current operation.
(2) single phase transformer runs the control strategy being switched to dual transformer and running
For better understanding, ensure the requirement that each transformer rotation runs simultaneously, when two transformers run, always ensure that 2# transformer is in the state of putting into operation.
When main transformer three-phase current maximum (the N minute sliding window values of electric current, N is configurable), the regular hour (as 60 minutes) reaches the certain proportion (as 85%) of this transformer rated current continuously, automatically drops into another transformer:
If 2# transformer is in the state of putting into operation at present, drop into another transformer according to first exiting the principle first dropped into;
If 1# or 3# transformer is in the state of putting into operation at present, drop into 2# transformer.
Ordering in launching: the step down side main transformer switch that the high voltage side of transformer service entrance switch preparing to drop into that closes, preparation of closing drop into, disconnects association interconnection switch simultaneously.If drop into 1#, 2# transformer, disconnect 400V bus 1# interconnection switch; If drop into 2, No. 3 transformers, disconnect 400V bus 2# interconnection switch.
(3) control strategy of dual transformer rotation operation
When two maximum phase-splittings of transformer always add electric current (the N minute sliding window values of electric current, N is configurable) continuously regular hour (as 60 days) certain proportion (as 85%) with stoppage in transit transformer rated current sum strong lower than 2# transformation time, the operation of automatic alternate 1#, 3# transformer.
1#, 2# transformer runs the transfer sequence being switched to 2#, 3# transformer and running: 400V bus 2# mother of closing, the 3# high voltage side of transformer service entrance switch that closes, the 3# step down side main transformer switch that closes, disconnection 1# high voltage side of transformer service entrance switch, disconnection 1# step down side main transformer switch, disconnection 400V bus 1# mother.
2#, 3# transformer runs the transfer sequence being switched to 1#, 2# transformer and running: 400V bus 1# mother of closing, the 1# high voltage side of transformer service entrance switch that closes, the 1# step down side main transformer switch that closes, disconnection 3# high voltage side of transformer service entrance switch, disconnection 3# step down side main transformer switch, disconnection 400V bus 2# mother.
(4) two transformers are switched to the control strategy of single phase transformer operation
When two transformers run, wherein one is 2# transformer.
When two maximum phase-splittings of transformer always add electric current (the N minute sliding window values of electric current, N is configurable) continuously certain proportion (as 85%) of regular hour (as 24 hours) lower than certain single transformer rated current time, automatically exit another transformer; During certain proportion (as 85%) lower than any single transformer rated current, automatically exit the transformer dropped in advance.
Transfer sequence: the bus connection switch that closes, disconnection need step down side main transformer switch out of service, disconnect needs high voltage side of transformer service entrance switch out of service
(5) dual transformer is switched to the control strategy that three transformers run
When 2# step down side maximum current (the N minute sliding window values of electric current, N is configurable), the regular hour (as 60 minutes) reaches the certain proportion (as 85%) of 2# transformer rated current continuously, drops into the 3rd transformer.
Ordering in launching: the 3rd the high voltage side of transformer service entrance switch that close, the 3rd the step down side main transformer switch that close, disconnect whole low-pressure side bus interconnection switch.
(6) three transformers are switched to the control strategy of dual transformer operation
When the maximum phase-splitting of 1# low-pressure side electric current+2# low-pressure side electric current always adds electric current (the N minute sliding window values of electric current, N is configurable) continuously certain proportion (as 85%) of regular hour (as 24 hours) lower than 2# transformer capacity time, automatically exit 1# transformer, be switched to 2, No. 3 transformers and run.
Transfer sequence: 400V bus 1# mother of closing, disconnection 1# high voltage side of transformer service entrance switch, disconnection 1# step down side main transformer switch.
When the maximum phase-splitting of 3# low-pressure side electric current+2# low-pressure side electric current always adds (the N minute sliding window values of electric current, N is configurable) continuously certain proportion (as 85%) of regular hour (as 24 hours) lower than 2# transformer capacity time, automatically exit 3# transformer, be switched to 1#, 2# transformer and run.
Transfer sequence: 400V bus 2# mother of closing, disconnection 3# high voltage side of transformer service entrance switch, disconnection 3# step down side main transformer switch.
In sum, the method that a kind of transformer load capacity provided by the invention controls automatically, not only realizes the Automatic Control to power distribution room transformer, and reduction human input, improves the automation control system of power distribution room; And effectively reduce the electric energy loss of transformer, extend the service life of transformer; Further, lower the loss of power circuit, there is significant energy-saving effect and good returns of investment and social benefit
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalents utilizing specification of the present invention and accompanying drawing content to do, or be directly or indirectly used in relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. the method that automatically controls of transformer load capacity, is characterized in that, be configured with two transformers in power distribution room, forms dual transformer when two transformers run simultaneously;
Preset first and judge that the cycle and second judges the cycle, the described first judgement cycle was shorter than for the second judgement cycle;
The power load capacity of operating transformer is detected in real time;
During the preset percentage of the power load capacity when only single transformer runs all the time less than or equal to the rated load capacity of another transformer within the first judgement cycle; Then automatically switch to another transformer described to run;
When power load capacity when only single transformer runs is more than or equal to the preset percentage of self rated load capacity all the time within the first judgement cycle; Then automatically drop into another transformer to run, composition dual transformer;
During the preset percentage of the total power load capacity when two transformers run simultaneously all the time lower than the wherein rated load capacity of a transformer within the second judgement cycle; Then automatically exit another transformer.
2. the method that automatically controls of a kind of transformer load capacity according to claim 1, it is characterized in that, also comprise: during the preset percentage of total power load capacity when two transformers run simultaneously all the time lower than the rated load capacity of arbitrary transformer within the second judgement cycle; Then automatically exit the transformer put into operation at first.
3. the method that automatically controls of a kind of transformer load capacity according to claim 1, it is characterized in that, described judgement ratio is 70-95%; First judgement cycle was 60-90 minute; The described second judgement cycle is 15-30 hour.
4. the method that automatically controls of a kind of transformer load capacity according to claim 1 and 2, is characterized in that, single transformer runs to switch to when another transformer runs and is specially:
Automatic control switch cabinet to close the high voltage side lead-in switch of the transformer that will switch and low-pressure side main transformer switch according to sequencing; Low-pressure side main transformer switch and the high voltage side lead-in switch of the transformer of current operation is disconnected according to sequencing;
Described " automatically dropping into another transformer to run, composition dual transformer " is specially:
Automatic control switch cabinet to close the high voltage side lead-in switch of the transformer that will drop into and low-pressure side main transformer switch according to sequencing; Disconnect the low-pressure side bus interconnection switch of the transformer previously run;
Two transformer operations are exited a wherein transformer and are specially:
Automatic control switch cabinet closes the mother of two transformers; Automatically low-pressure side main transformer switch and the high voltage side lead-in switch of wanted transformer out of service is disconnected according to sequencing.
5. the method that automatically controls of transformer load capacity, is characterized in that, comprise two groups of dual transformers according to claim 1 in power distribution room.
6. the method that automatically controls of transformer load capacity, is characterized in that, be configured with three transformers in power distribution room, forms dual transformer simultaneously, form three transformers when three transformers run simultaneously when two transformers run; Preset the judgement cycle;
The power load capacity of operating transformer is detected in real time;
During the preset percentage of the power load capacity when only single transformer runs or only two transformers run all the time greater than or equal to the rated load capacity of self single transformer or self two transformer within the judgement cycle, then automatically switch to the single transformer of the power load capacity requirement meeting transformer in current operation, two transformers or three transformers and run;
When preset percentage all the time lower than any two transformers or the rated load capacity of single transformer arbitrarily within the judgement cycle of total power load capacity of operating three transformers, then automatically switch to two transformers meeting transformer power load capacity requirement in current operation and to run or single transformer runs simultaneously.
7. the method that automatically controls of a kind of transformer load capacity according to claim 6, it is characterized in that, the judgement handoff procedure for single transformer specifically comprises:
Power load capacity when only single transformer runs within the judgement cycle all the time less than or equal to when being in the preset percentage of rated load capacity of single transformer of non-operating state; The single transformer being in non-operating state described in then automatically switching to runs;
When power load capacity when only single transformer runs is more than or equal to the preset percentage of self rated load capacity all the time within the judgement cycle; Then automatically drop into the single transformer being in non-operating state to run, composition dual transformer.
8. the method that automatically controls of a kind of transformer load capacity according to claim 6, it is characterized in that, the judgement handoff procedure simultaneously run for two transformers specifically comprises:
During the preset percentage of the total power load capacity when only two transformers run all the time less than or equal to total rated load capacity of the single transformer and operating single transformer that are in non-operating state within the judgement cycle; The single transformer of non-operating state is in described in then automatically dropping into; And exit another transformer be originally in running status to run;
During the preset percentage of the total power load capacity when only two transformers run all the time less than or equal to the rated load capacity of any single transformer within the judgement cycle; Then automatically switch to described single transformer to run;
During the preset percentage of the total power load capacity when only two transformers run all the time greater than or equal to the rated load capacity of self within the judgement cycle; Then automatically drop into the transformer being in non-operating state to run.
9. the method that automatically controls of a kind of transformer load capacity according to claim 6, it is characterized in that, judgement handoff procedure when simultaneously running for three transformers specifically comprises:
When preset percentage all the time lower than described two transformers wherein rated load capacity of a transformer within the judgement cycle of total power load capacity of two transformers in operating three transformers; Then automatically switch to the dual transformer be made up of described transformer and the single transformer being in non-operating state to run.
10. the method that automatically controls of a kind of transformer load capacity according to claim 6, is characterized in that, when to meet the transformer that will drop into or switch be more than two, automatically puts into operation according to first exiting first the commitment principle;
Described judgement ratio is 70-95%; The described judgement cycle is 60-1200 minute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510038060.7A CN104505833A (en) | 2015-01-26 | 2015-01-26 | Method for automatically controlling load capacity of transformer |
Applications Claiming Priority (1)
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| CN201510038060.7A CN104505833A (en) | 2015-01-26 | 2015-01-26 | Method for automatically controlling load capacity of transformer |
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| CN107134808A (en) * | 2017-07-15 | 2017-09-05 | 王韶晖 | Platform becomes group's automatic control system and control method |
| CN108270214A (en) * | 2016-12-30 | 2018-07-10 | 孙麓轩 | A kind of transformer load diagnostic method and device |
| CN108539777A (en) * | 2018-05-10 | 2018-09-14 | 国网江苏省电力有限公司徐州供电分公司 | A kind of Poewr control method for low pressure flexibility supplying power allocation system |
| CN108539776A (en) * | 2018-05-10 | 2018-09-14 | 国网江苏省电力有限公司徐州供电分公司 | One kind being used for low pressure flexibility supplying power allocation system coordination control method |
| CN108599153A (en) * | 2018-05-10 | 2018-09-28 | 国网江苏省电力有限公司徐州供电分公司 | A kind of off-network for low pressure flexibility supplying power allocation system turns grid-connected Phase angle control method |
| CN108732985A (en) * | 2018-05-21 | 2018-11-02 | 泰豪科技股份有限公司 | A method of control unit first puts into first off-the-line |
| CN110826011A (en) * | 2019-10-11 | 2020-02-21 | 国网安徽省电力有限公司检修分公司 | Method and system for judging whether multiple transformers can be grouped |
| CN114325495A (en) * | 2021-12-20 | 2022-04-12 | 山东汇能电气有限公司 | Operation protection method for distribution transformer based on loss comparison |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108270214A (en) * | 2016-12-30 | 2018-07-10 | 孙麓轩 | A kind of transformer load diagnostic method and device |
| CN107134808A (en) * | 2017-07-15 | 2017-09-05 | 王韶晖 | Platform becomes group's automatic control system and control method |
| CN107134808B (en) * | 2017-07-15 | 2020-08-07 | 王韶晖 | Automatic control system and control method for transformer group |
| CN108539777A (en) * | 2018-05-10 | 2018-09-14 | 国网江苏省电力有限公司徐州供电分公司 | A kind of Poewr control method for low pressure flexibility supplying power allocation system |
| CN108539776A (en) * | 2018-05-10 | 2018-09-14 | 国网江苏省电力有限公司徐州供电分公司 | One kind being used for low pressure flexibility supplying power allocation system coordination control method |
| CN108599153A (en) * | 2018-05-10 | 2018-09-28 | 国网江苏省电力有限公司徐州供电分公司 | A kind of off-network for low pressure flexibility supplying power allocation system turns grid-connected Phase angle control method |
| CN108539776B (en) * | 2018-05-10 | 2021-05-07 | 国网江苏省电力有限公司徐州供电分公司 | Coordination control method for low-voltage flexible distribution network power supply system |
| CN108732985A (en) * | 2018-05-21 | 2018-11-02 | 泰豪科技股份有限公司 | A method of control unit first puts into first off-the-line |
| CN110826011A (en) * | 2019-10-11 | 2020-02-21 | 国网安徽省电力有限公司检修分公司 | Method and system for judging whether multiple transformers can be grouped |
| CN110826011B (en) * | 2019-10-11 | 2023-06-09 | 国网安徽省电力有限公司超高压分公司 | Method and system for judging whether multiple transformers can be grouped |
| CN114325495A (en) * | 2021-12-20 | 2022-04-12 | 山东汇能电气有限公司 | Operation protection method for distribution transformer based on loss comparison |
| CN114325495B (en) * | 2021-12-20 | 2022-09-13 | 山东汇能电气有限公司 | Operation protection method for distribution transformer based on loss comparison |
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