CN110190601A - A kind of closed loop network turns the method, apparatus and system of power supply - Google Patents
A kind of closed loop network turns the method, apparatus and system of power supply Download PDFInfo
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- CN110190601A CN110190601A CN201910583617.3A CN201910583617A CN110190601A CN 110190601 A CN110190601 A CN 110190601A CN 201910583617 A CN201910583617 A CN 201910583617A CN 110190601 A CN110190601 A CN 110190601A
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000007363 ring formation reaction Methods 0.000 claims abstract description 182
- 238000013461 design Methods 0.000 claims abstract description 61
- 229910001037 White iron Inorganic materials 0.000 claims abstract description 57
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 57
- 239000000956 alloy Substances 0.000 claims abstract description 57
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- 230000005611 electricity Effects 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 8
- 241000208340 Araliaceae Species 0.000 description 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 2
- 235000008434 ginseng Nutrition 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
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Classifications
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- H02J3/005—
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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
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
Abstract
A kind of cyclization turn power supply aid decision-making method disclosed in the embodiment of the present application, apparatus and system, it include: acquisition design impedance, system impedance and cyclization pressure difference, according to design impedance, system impedance and cyclization pressure difference are calculated for carrying electric current and circulating power electric current, it sums it up to obtain Alloy White Iron for carrying electric current and circulating power electric current, obtain breaker protection seting electric current, and by it compared with Alloy White Iron size, if setting current is greater than Alloy White Iron, obtaining can cyclization conclusion, if setting current is less than or equal to Alloy White Iron, then adjust setting current, if setting current adjusted is greater than Alloy White Iron, then obtaining can cyclization conclusion.Using method above-mentioned, by obtaining real-time device parametric and operating parameter online, in line computation Alloy White Iron, realizes the dynamic adjustment of relay protection, prevent false protection situation, improve the real-time and accuracy of Alloy White Iron, improve power supply reliability.
Description
Technical field
This application involves closed loop network technical fields, more particularly to turn method, the dress of power supply with a kind of closed loop network
It sets and system.
Background technique
In the power system, usually using transformer progress voltage transformation, with guarantee transformed voltage can by with
Family is used.For the sake of safety, transformer is usually serially connected with relay protection system, and the breaker in the relay protection system can be examined
The actual current for surveying distribution line in electric system, actual current is compared with preset setting current, if actual current
Greater than the setting current, then breaker control distribution line disconnects.
The network settings that transformer and breaker compose in series are in substation, if the effect of the substation is by high pressure
It is transformed to low pressure, the distribution line before transformer is known as inlet highway, the distribution line after transformer is known as powering
Bus.It is provided with interconnection switch on power supply buses, when power failure one of in Liang Ge substation or maintenance, needs to be closed connection
Network switch, carries out Loop Closing Operation, so that the power supply buses for the substation for wherein having a power failure or overhauling are connected to another substation
Power supply buses complete the load transfer of Liang Ge substation, therefore Loop Closing Operation is also referred to as cyclization and turns power supply.
However, in the cyclization that cyclization turns for electric forming, generating cyclization since there are certain pressure differences on interconnection switch both sides
Electric current can trigger breaker actuation, cyclization is caused to fail if the Alloy White Iron is greater than the setting current of breaker, Jin Eryin
Larger range of power failure is played, power supply reliability is reduced.
Summary of the invention
This application provides a kind of cyclizations to turn power supply aid decision-making method, apparatus and system, is greater than with solving Alloy White Iron
The setting current of breaker can trigger breaker actuation, cyclization is caused to fail, and then cause larger range of power failure, reduce and supply
The technical issues of electric reliability.
In a first aspect, the embodiment of the present application provides a kind of cyclization turn power supply aid decision-making method, the method is applied to close
Ring turns the data processor in power supply aid decision-making system, and the cyclization turns power supply aid decision-making system further include: data acquisition
Equipment, the data acquisition facility are connected with each equipment in Liang Ge substation respectively；
Using interconnection switch position as cyclization point, using cyclization point as separation, cyclization is turned into bearing load after powering
Side as the side m, the other side is as the side p；
The data acquisition facility is used to obtain the device parameter and operating parameter of each equipment in cyclization point two sides, and by institute
It states device parameter and operating parameter is sent to the data processor；
The described method includes:
The target device parameter for obtaining power supply buses to each equipment between cyclization point respectively, by the target device parameter
In impedance adduction, obtain cyclization point two sides design impedance；
The voltage for obtaining the side m and the side p power supply buses respectively, it is poor that two voltages are made, and obtains cyclization pressure difference；
The equivalent impedance for obtaining the inlet highway in the operating parameter of cyclization point two sides respectively, the equivalent impedance is summed it up,
Obtain the system impedance of cyclization point two sides；
According to the cyclization pressure difference, system impedance and design impedance, circulating power electric current is calculated；
According to the system impedance and design impedance, calculate for carrying electric current；
The circulating power electric current is obtained into Alloy White Iron for carrying electric current adduction with described；
The setting current of the side m breaker is obtained, whether the setting current is greater than the Alloy White Iron；
If the setting current is greater than the Alloy White Iron, acquisition can cyclization conclusion.
With reference to first aspect, in one implementation, the method also includes:
If the setting current is less than or equal to the Alloy White Iron, the setting current is adjusted；
Judge whether setting current adjusted is greater than the Alloy White Iron；
It can cyclization conclusion if it is, obtaining.
It is with reference to first aspect, in one implementation, described according to cyclization point pressure difference, system impedance and design impedance,
Calculate circulating power electric current, comprising:
Circulating power electric current is calculated according to the following formula:
Wherein, IxhFor circulating power electric current, Δ U is cyclization pressure difference,For the design impedance of the side m,What it is for the side m is
System impedance,For the design impedance of the side p,For the system impedance of the side p.
With reference to first aspect, in one implementation, described according to system impedance and design impedance, it calculates for carrying electricity
Stream, comprising:
The intersection of route where the intersection and power supply buses branch of power supply buses and each branch and cyclization point is made
For node, active power and reactive power at each node are obtained；
The side m load is calculated according to the following formula:
Wherein, PLoadFor the side m load, PmiFor the active power of each node in the side m, j is imaginary part, QmiFor the nothing of each node in the side m
Function power, k are the number of nodes of the side m；
Power after calculated load dislocation according to the following formula:
Wherein, PIt movesFor the power after load dislocation,For the system impedance of the side m,For the design impedance of the side m,
For the design impedance of the side p,For the system impedance of the side p, i is the node of cyclization point two sides, and n is total node number, PiFor node i
The active power at place, QiFor the reactive power at node i；
It is calculated according to the following formula for carrying power:
PFor carrying=PIt moves-PLoad；
Wherein, PFor carryingFor for carrying power；
It is calculated according to the following formula for carrying electric current:
Wherein, IgzFor for carrying electric current, UeFor rated line voltage at cyclization point.
Second aspect, the embodiment of the present application part provide a kind of cyclization turn power supply aid decision device, and described device is answered
Turn the data processor in power supply aid decision-making system for cyclization, the cyclization turns power supply aid decision-making system further include: number
According to equipment is obtained, the data acquisition facility is connected with each equipment in Liang Ge substation respectively；
Using interconnection switch position as cyclization point, using cyclization point as separation, cyclization is turned into bearing load after powering
Side as the side m, the other side is as the side p；
The data acquisition facility is used to obtain the device parameter and operating parameter of each equipment in cyclization point two sides, and by institute
It states device parameter and operating parameter is sent to the data processor；
Described device includes:
Design impedance obtains module, for obtaining the target device ginseng of power supply buses to each equipment between cyclization point respectively
Number sums it up the impedance in the target device parameter, obtains the design impedance of cyclization point two sides；
Cyclization pressure difference obtains module, and for obtaining the voltage of the side m and the side p power supply buses respectively, it is poor that two voltages are made, and obtains
Obtain cyclization pressure difference；
System impedance obtains module, for obtaining the equivalent resistance of the inlet highway in the operating parameter of cyclization point two sides respectively
It is anti-, the equivalent impedance is summed it up, the system impedance of cyclization point two sides is obtained；
Circulating power current calculation module, for calculating circulation according to the cyclization pressure difference, system impedance and design impedance
Power current；
For carrying current calculation module, for calculating for carrying electric current according to the system impedance and design impedance；
Alloy White Iron computing module obtains cyclization electricity for summing it up the circulating power electric current for carrying electric current with described
Stream；
Comparison module, for obtaining the setting current of the side m breaker, whether the setting current is greater than the cyclization
Electric current；
First determining module, if being greater than the Alloy White Iron for the setting current, acquisition can cyclization conclusion.
In conjunction with second aspect, in one implementation, described device further include:
Setting current adjusts module, if being less than or equal to the Alloy White Iron for the setting current, described in adjustment
Setting current；
Judgment module, for judging whether setting current adjusted is greater than the Alloy White Iron；
Second determining module, for determining that setting current adjusted is greater than the Alloy White Iron in the judgment module
In the case of, acquisition can cyclization conclusion.
In conjunction with second aspect, in one implementation, the circulating power current calculation module, comprising:
First computing unit, for calculating circulating power electric current according to the following formula:
Wherein, IxhFor circulating power electric current, Δ U is cyclization pressure difference,For the design impedance of the side m,What it is for the side m is
System impedance,For the design impedance of the side p,For the system impedance of the side p.
It is in one implementation, described for carrying current calculation module in conjunction with second aspect, comprising:
Power obtaining unit, for obtaining active power and reactive power at each node, wherein by power supply buses with
The intersection of route is as node where the intersection of each branch and power supply buses branch and cyclization point；
Second computing unit, for calculating the side m load according to the following formula:
Wherein, PLoadFor the side m load, PmiFor the active power of each node in the side m, j is imaginary part, QmiFor the nothing of each node in the side m
Function power, k are the number of nodes of the side m；
Third computing unit, for the power after calculated load dislocation according to the following formula:
Wherein, PIt movesFor the power after load dislocation,For the system impedance of the side m,For the design impedance of the side m,
For the design impedance of the side p,For the system impedance of the side p, i is the node of cyclization point two sides, and n is total node number, PiFor node i
The active power at place, QiFor the reactive power at node i；
4th computing unit, for being calculated according to the following formula for carrying power:
PFor carrying=PIt moves-PLoad；
Wherein, PFor carryingFor for carrying power；
5th computing unit, for being calculated according to the following formula for carrying electric current:
Wherein, IgzFor for carrying electric current, UeFor rated line voltage at cyclization point.
The third aspect, the application provide a kind of cyclization turn power supply aid decision-making system, and the cyclization turns power supply aid decision
System includes: data processor and data acquisition facility；
Be connected respectively with each equipment in the Liang Ge substation data acquisition facility of the data acquisition facility is used
In the device parameter and operating parameter of the acquisition each equipment in cyclization point two sides, and the device parameter and operating parameter are sent to
The data processor；
The data processor includes device described in any one of second aspect.
In conjunction with the third aspect, in one implementation, the system also includes: data display equipment, the data are aobvious
Show that equipment is connected with the data processor, the data display equipment is used to show the knot of the data processor output
By.
A kind of cyclization provided by the present application turns power supply aid decision-making method, apparatus and system, using side disclosed in the present application
Case, in line computation Alloy White Iron, is realized the dynamic adjustment of relay protection, is prevented by obtaining real-time device parametric and operating parameter
False protection situation only occurs, improves the real-time and accuracy of Alloy White Iron, improves power supply reliability.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without creative efforts, also
Other drawings may be obtained according to these drawings without any creative labor.
Fig. 1 is the flow diagram that a kind of cyclization provided by the embodiments of the present application turns power supply aid decision-making method；
Fig. 2 is the structural schematic diagram of load dislocation in the application one embodiment；
Fig. 3 is the structural schematic diagram that a kind of cyclization provided by the embodiments of the present application turns power supply aid decision device.
Specific embodiment
In order to make the above objects, features, and advantages of the present application more apparent, with reference to the accompanying drawing and it is specific real
Applying mode, the present application will be further described in detail.
This application provides a kind of cyclizations to turn power supply aid decision-making method, apparatus and system, is greater than with solving Alloy White Iron
The setting current of breaker can trigger breaker actuation, cyclization is caused to fail, and then cause larger range of power failure, reduce and supply
The technical issues of electric reliability.
The embodiment of the present application provides a kind of cyclization turn power supply aid decision-making method, and it is auxiliary that the method is applied to cyclization turn power supply
The data processor in decision system is helped, the cyclization turns power supply aid decision-making system further include: data acquisition facility, the number
It is connected respectively with each equipment in Liang Ge substation according to equipment is obtained；
Using interconnection switch position as cyclization point, using cyclization point as separation, cyclization is turned into bearing load after powering
Side as the side m, the other side is as the side p；
Herein, for the ease of distinguishing, using cyclization point as separation, the side of bearing load is as m after cyclization is turned power supply
Side, the other side do not constitute the restriction to the application as the side p.
The data acquisition facility is used to obtain the device parameter and operating parameter of each equipment in cyclization point two sides, and by institute
It states device parameter and operating parameter is sent to the data processor；
Wherein, data acquisition facility obtains device parameter and operating parameter, equipment ginseng from the database to ring system
Number is equipment nominal parameter, including capacity, rated power, voltage rating, nominal transformation ratio, design impedance and equivalent line impedance
Deng；Operating parameter is the parameter, including working voltage, current active power and current reactive power etc. of equipment in operation.Pass through
It is online to obtain device parameter and equipment on-line operating parameter, improve real-time and accuracy.
Work flow diagram shown in referring to Fig.1, the embodiment of the present application provide a kind of cyclization turn power supply aid decision-making method packet
Include following steps:
Step 101, the target device parameter for obtaining power supply buses to each equipment between cyclization point respectively, by the target
Impedance adduction in device parameter, obtains the design impedance of cyclization point two sides；
In this step, set first from the target for obtaining power supply buses to each equipment between cyclization point in device parameter
It include design impedance of the power supply buses to each equipment between cyclization point in target component for parameter, each design impedance adduction is
For the design impedance in ring system.
Step 102, the voltage for obtaining the side m and the side p power supply buses respectively, it is poor that two voltages are made, and obtains cyclization pressure difference；
In this step, the virtual voltage of cyclization point two sides power supply buses is obtained from equipment operating parameter, two sides are for the goddess of lightning
The difference of the virtual voltage of line is cyclization pressure difference.
Step 103, the equivalent impedance for obtaining the inlet highway in the operating parameter of cyclization point two sides respectively, by the equivalent resistance
Anti- adduction obtains the system impedance of cyclization point two sides；
In this step, the inlet highway equivalent impedance parameter of cyclization point two sides is obtained, by the equivalent impedance of cyclization point two sides
Adduction, can be obtained the system impedance of cyclization.
Step 104, according to the cyclization pressure difference, system impedance and design impedance, circulating power electric current is calculated；
In this step, according to cyclization pressure difference, system impedance and the design impedance obtained in step 101,102 and 103, calculate
Circulating power electric current.
Optionally, circulating power electric current is calculated according to the following formula:
Wherein, IxhFor circulating power electric current, Δ U is cyclization pressure difference,For the design impedance of the side m,What it is for the side m is
System impedance,For the design impedance of the side p,For the system impedance of the side p.
Step 105, it according to the system impedance and design impedance, calculates for carrying electric current；
In this step, according to the system impedance and design impedance obtained in step 101 and 103, calculate for carrying electric current.
Wherein, load transposition method is used at last for carrying galvanometer, that is, the load of each node in economic cooperation circling point two sides is equivalent
It is displaced at one, convenient for calculating, load is that active power and reactive power sum it up.Specifically, being carried after calculating cyclization first negative
Power after the total load of lotus side, then calculated load dislocation is calculated according to the power meter after total load and dislocation for carrying power,
Finally calculate according to for carrying power and route voltage rating for carrying electric current.
Optionally, by route where the intersection and power supply buses branch of power supply buses and each branch and cyclization point
Intersection obtains the active power and reactive power at each node as node；
The side m load is calculated according to the following formula:
Wherein, PLoadFor the side m load, PmiFor the active power of each node in the side m, j is imaginary part, QmiFor the nothing of each node in the side m
Function power, k are the number of nodes of the side m；
Power after calculated load dislocation according to the following formula:
Wherein, PIt movesFor the power after load dislocation,For the system impedance of the side m,For the design impedance of the side m,
For the design impedance of the side p,For the system impedance of the side p, i is the node of cyclization point two sides, and n is total node number, PiFor node i
The active power at place, QiFor the reactive power at node i；
It is calculated according to the following formula for carrying power:
PFor carrying=PIt moves-PLoad；
Wherein, PFor carryingFor for carrying power；
It is calculated according to the following formula for carrying electric current:
Wherein, IgzFor for carrying electric current, UeFor rated line voltage at cyclization point.
Step 106, the circulating power electric current is summed it up with described for carrying electric current, obtains Alloy White Iron；
In this step, circulating power electric current that step 104 and step 105 are calculated and for carrying electric current adduction can obtain cyclization
Electric current.
Step 107, the setting current of the side m breaker is obtained, whether the setting current is greater than the Alloy White Iron；
If the setting current is greater than the Alloy White Iron, 108 operation is thened follow the steps, otherwise, executes the operation of step 109.
Step 108, if the setting current is greater than the Alloy White Iron, acquisition can cyclization conclusion.
Step 107, first by obtaining the setting current (setting valve) of system break road device, then will acquire in 108
To setting current compared with the Alloy White Iron being calculated in step 106 size, if the setting current be greater than cyclization electricity
Stream, then obtain can cyclization conclusion, by comparing the size of breaker setting valve and Alloy White Iron before cyclization, increase cyclization can
By property.
Step 109, if the setting current is less than or equal to the Alloy White Iron, the setting current is adjusted；
Step 110, judge whether setting current adjusted is greater than the Alloy White Iron；
It can cyclization conclusion if it is, obtaining.
Step 109 is in 110, when Alloy White Iron calculated in step 106 is greater than the setting current of breaker, if by force
Row cyclization, then will lead to circuit breaker trip, the application by comparing Alloy White Iron and the setting current of breaker size, if
Alloy White Iron be greater than setting current, then can directly obtain can cyclization conclusion, if Alloy White Iron be greater than setting current, online
Adjust breaker setting valve (setting current), when setting current adjusted be greater than Alloy White Iron when, acquisition can cyclization conclusion, adopt
It is realized the dynamic adjustment of relay protection by on-line tuning relay setting with preceding method, places relay protection and miss
Movement.
A kind of cyclization turn power supply aid decision-making method disclosed in the embodiment of the present application, comprising: obtain design impedance, system resistance
Anti- and cyclization pressure difference is calculated for carrying electric current and circulating power electric current according to design impedance, system impedance and cyclization pressure difference, is supplied
It carries electric current and circulating power electric current to sum it up to obtain Alloy White Iron, obtains breaker protection seting electric current, and by itself and Alloy White Iron
Compare size, if setting current be greater than Alloy White Iron, obtain can cyclization conclusion, if setting current be less than or equal to cyclization electricity
Stream, then adjust setting current, if setting current adjusted is greater than Alloy White Iron, it is concluded that can cyclization conclusion.Using above-mentioned
Method, in line computation Alloy White Iron, realizes the dynamic tune of relay protection by obtaining real-time device parametric and operating parameter online
It is whole, prevent false protection situation, improve the real-time and accuracy of Alloy White Iron, improves power supply reliability.
In order to which clearer paraphrase supplies current-carrying calculating, as an example, Fig. 2 is for carrying the load dislocation etc. that electric current calculates
Schematic diagram is imitated, in Fig. 2, A is cyclization schematic diagram, and B is the equivalent schematic of A, and C is the schematic diagram in B after load dislocation, it is assumed that is closed
The side p load is gone into the side m after ring operation, therefore, for carrying power as the difference of m lateral load before the power of the side m after cyclization and cyclization.
In Fig. 2, P1+jQ1For the load at p side system impedance, P2+jQ2For for the load at p side apparatus impedance, P3+jQ3For m side system
Load at impedance, P4+jQ4For the load at m side apparatus impedance, the load after load dislocation at cyclization point is folded for all loads
Add, that is, all loads are displaced at one, which is system impedance and design impedance summation.Therefore,
For current-carrying specific calculating process are as follows:
Firstly, the side m total load are as follows:
Pm=P3+P4+j(Q3+Q4)；
Wherein, there are two node, P for the side mmFor the side m load, P3And P4Active power respectively at the node of the side m two, j are
Imaginary part, Q3And Q4Reactive power respectively at the node of the side m two；
Secondly, the power after load dislocation are as follows:
Wherein, there are four node, P in total for cyclization point two sidesIt movesFor power after load dislocation, P1And P2The respectively section of the side p two
Active power at point, j is imaginary part, Q1And Q2Reactive power respectively at the node of the side p two；It is hindered for the system of the side p
It is anti-,For the design impedance of the side p,For the design impedance of the side m,For the system impedance of the side m.
Then, for carrying power are as follows:
PFor carrying=PIt moves-Pm；
Wherein, PFor carryingFor for carrying power；
Finally, for carrying electric current are as follows:
Wherein, IgzFor for carrying electric current, UeFor rated line voltage at cyclization point.
Second aspect, the embodiment of the present application part provide a kind of cyclization turn power supply aid decision device, and described device is answered
Turn the data processor in power supply aid decision-making system for cyclization, the cyclization turns power supply aid decision-making system further include: number
According to equipment is obtained, the data acquisition facility is connected with each equipment in Liang Ge substation respectively；
Using interconnection switch position as cyclization point, using cyclization point as separation, cyclization is turned into bearing load after powering
Side as the side m, the other side is as the side p；
The data acquisition facility is used to obtain the device parameter and operating parameter of each equipment in cyclization point two sides, and by institute
It states device parameter and operating parameter is sent to the data processor；
Referring to structural schematic diagram shown in Fig. 3, the embodiment of the present application provides a kind of cyclization turn power supply aid decision device, institute
Stating device includes:
Design impedance obtains module 301, and the target for obtaining power supply buses to each equipment between cyclization point respectively is set
Standby parameter, the impedance in the target device parameter is summed it up, and obtains the design impedance of cyclization point two sides；
Cyclization pressure difference obtains module 302, and for obtaining the voltage of the side m and the side p power supply buses respectively, two voltages are made
Difference obtains cyclization pressure difference；
System impedance obtains module 303, for obtaining the equivalence of the inlet highway in the operating parameter of cyclization point two sides respectively
Impedance sums it up the equivalent impedance, obtains the system impedance of cyclization point two sides；
Circulating power current calculation module 304, for calculating according to the cyclization pressure difference, system impedance and design impedance
Circulating power electric current；
For carrying current calculation module 305, for calculating for carrying electric current according to the system impedance and design impedance；
Alloy White Iron computing module 306 obtains cyclization for summing it up the circulating power electric current for carrying electric current with described
Electric current；
Comparison module 307, for obtaining the setting current of the side m breaker, whether the setting current is greater than described
Alloy White Iron；
First determining module 308, if being greater than the Alloy White Iron for the setting current, acquisition can cyclization knot
By.
In conjunction with second aspect, in one implementation, described device further include:
Setting current adjusts module 309, if being less than or equal to the Alloy White Iron for the setting current, adjusts institute
State setting current；
Judgment module 310, for judging whether setting current adjusted is greater than the Alloy White Iron；
Second determining module 311, for determining that setting current adjusted is greater than the cyclization electricity in the judgment module
In the case where stream, acquisition can cyclization conclusion.
In conjunction with second aspect, in one implementation, the circulating power current calculation module, comprising:
First computing unit, for calculating circulating power electric current according to the following formula:
Wherein, IxhFor circulating power electric current, Δ U is cyclization pressure difference,For the design impedance of the side m,What it is for the side m is
System impedance,For the design impedance of the side p,For the system impedance of the side p.
It is in one implementation, described for carrying current calculation module in conjunction with second aspect, comprising:
Power obtaining unit, for obtaining active power and reactive power at each node, wherein by power supply buses with
The intersection of route is as node where the intersection of each branch and power supply buses branch and cyclization point；
Second computing unit, for calculating the side m load according to the following formula:
Wherein, PLoadFor the side m load, PmiFor the active power of each node in the side m, j is imaginary part, QmiFor the nothing of each node in the side m
Function power, k are the number of nodes of the side m；
Third computing unit, for the power after calculated load dislocation according to the following formula:
Wherein, PIt movesFor the power after load dislocation,For the system impedance of the side m,For the design impedance of the side m,
For the design impedance of the side p,For the system impedance of the side p, i is the node of cyclization point two sides, and n is total node number, PiFor node i
The active power at place, QiFor the reactive power at node i；
4th computing unit, for being calculated according to the following formula for carrying power:
PFor carrying=PIt moves-PLoad；
Wherein, PFor carryingFor for carrying power；
5th computing unit, for being calculated according to the following formula for carrying electric current:
Wherein, IgzFor for carrying electric current, UeFor rated line voltage at cyclization point.
The third aspect, the application provide a kind of cyclization turn power supply aid decision-making system, and the cyclization turns power supply aid decision
System includes: data processor and data acquisition facility；
Be connected respectively with each equipment in the Liang Ge substation data acquisition facility of the data acquisition facility is used
In the device parameter and operating parameter of the acquisition each equipment in cyclization point two sides, and the device parameter and operating parameter are sent to
The data processor；
The data processor includes device described in any one of second aspect.
In conjunction with the third aspect, in one implementation, the system also includes: data display equipment, the data are aobvious
Show that equipment is connected with the data processor, the data display equipment is used to show the knot of the data processor output
By.
It wherein, include that user interface is shown and handled at the data by human-computer interaction in data display equipment
Manage device output conclusion, for example, processing data processor output can cyclization conclusion and setting current adjustment etc. conclusions.Operation side
Just, strong real-time.
Same and similar part may refer to each other between each embodiment in this specification.Implement especially for device
For example, since it is substantially similar to the method embodiment, so being described relatively simple, related place is referring in embodiment of the method
Explanation.
Combine detailed description and exemplary example that the application is described in detail above, but these explanations are simultaneously
It should not be understood as the limitation to the application.It will be appreciated by those skilled in the art that without departing from the application spirit and scope,
A variety of equivalent substitution, modification or improvements can be carried out to technical scheme and embodiments thereof, these each fall within the application
In the range of.The protection scope of the application is determined by the appended claims.
Claims (10)
1. a kind of cyclization turns power supply aid decision-making method, which is characterized in that the method is applied to cyclization and turns power supply aid decision
Data processor in system, the cyclization turn power supply aid decision-making system further include: data acquisition facility, the data acquisition
Equipment is connected with each equipment in Liang Ge substation respectively；
Using interconnection switch position as cyclization point, using cyclization point as separation, cyclization is turned one of bearing load after powering
Side is as the side m, and the other side is as the side p；
The data acquisition facility is used to obtain the device parameter and operating parameter of each equipment in cyclization point two sides, and sets described
Standby parameter and operating parameter are sent to the data processor；
The described method includes:
Acquisition power supply buses, will be in the target device parameter to the target device parameter of each equipment between cyclization point respectively
Impedance adduction, obtains the design impedance of cyclization point two sides；
The voltage for obtaining the side m and the side p power supply buses respectively, it is poor that two voltages are made, and obtains cyclization pressure difference；
The equivalent impedance for obtaining the inlet highway in the operating parameter of cyclization point two sides respectively, the equivalent impedance is summed it up, and is obtained
The system impedance of cyclization point two sides；
According to the cyclization pressure difference, system impedance and design impedance, circulating power electric current is calculated；
According to the system impedance and design impedance, calculate for carrying electric current；
The circulating power electric current is obtained into Alloy White Iron for carrying electric current adduction with described；
The setting current of the side m breaker is obtained, whether the setting current is greater than the Alloy White Iron；
If the setting current is greater than the Alloy White Iron, acquisition can cyclization conclusion.
2. the method according to claim 1, wherein the method also includes:
If the setting current is less than or equal to the Alloy White Iron, the setting current is adjusted；
Judge whether setting current adjusted is greater than the Alloy White Iron；
It can cyclization conclusion if it is, obtaining.
3. the method according to claim 1, wherein described hinder according to cyclization point pressure difference, system impedance and equipment
It is anti-, calculate circulating power electric current, comprising:
Circulating power electric current is calculated according to the following formula:
Wherein, IxhFor circulating power electric current, Δ U is cyclization pressure difference,For the design impedance of the side m,It is hindered for the system of the side m
It is anti-,For the design impedance of the side p,For the system impedance of the side p.
4. calculating is for carrying the method according to claim 1, wherein described according to system impedance and design impedance
Electric current, comprising:
Using the intersection of route where the intersection and power supply buses branch of power supply buses and each branch and cyclization point as section
Point obtains active power and reactive power at each node；
The side m load is calculated according to the following formula:
Wherein, PLoadFor the side m load, PmiFor the active power of each node in the side m, j is imaginary part, QmiFor the idle function of each node in the side m
Rate, k are the number of nodes of the side m；
Power after calculated load dislocation according to the following formula:
Wherein, PIt movesFor the power after load dislocation,For the system impedance of the side m,For the design impedance of the side m,For the side p
Design impedance,For the system impedance of the side p, i is the node of cyclization point two sides, and n is total node number, PiFor having at node i
Function power, QiFor the reactive power at node i；
It is calculated according to the following formula for carrying power:
PFor carrying=PIt moves-PLoad；
Wherein, PFor carryingFor for carrying power；
It is calculated according to the following formula for carrying electric current:
Wherein, IgzFor for carrying electric current, UeFor rated line voltage at cyclization point.
5. a kind of cyclization turns power supply aid decision device, which is characterized in that described device is applied to cyclization and turns power supply aid decision
Data processor in system, the cyclization turn power supply aid decision-making system further include: data acquisition facility, the data acquisition
Equipment is connected with each equipment in Liang Ge substation respectively；
Using interconnection switch position as cyclization point, using cyclization point as separation, cyclization is turned one of bearing load after powering
Side is as the side m, and the other side is as the side p；
The data acquisition facility is used to obtain the device parameter and operating parameter of each equipment in cyclization point two sides, and sets described
Standby parameter and operating parameter are sent to the data processor；
Described device includes:
Design impedance obtains module, for obtaining the target device parameter of power supply buses to each equipment between cyclization point respectively,
By the impedance adduction in the target device parameter, the design impedance of cyclization point two sides is obtained；
Cyclization pressure difference obtains module, and for obtaining the voltage of the side m and the side p power supply buses respectively, it is poor that two voltages are made, and is closed
Ring pressure difference；
System impedance obtains module, will for obtaining the equivalent impedance of the inlet highway in the operating parameter of cyclization point two sides respectively
The equivalent impedance adduction, obtains the system impedance of cyclization point two sides；
Circulating power current calculation module, for calculating circulating power according to the cyclization pressure difference, system impedance and design impedance
Electric current；
For carrying current calculation module, for calculating for carrying electric current according to the system impedance and design impedance；
Alloy White Iron computing module obtains Alloy White Iron for summing it up the circulating power electric current for carrying electric current with described；
Comparison module, for obtaining the setting current of the side m breaker, whether the setting current is greater than the cyclization electricity
Stream；
First determining module, if being greater than the Alloy White Iron for the setting current, acquisition can cyclization conclusion.
6. device according to claim 5, which is characterized in that described device further include:
Setting current adjusts module, if being less than or equal to the Alloy White Iron for the setting current, adjusts the adjusting
Electric current；
Judgment module, for judging whether setting current adjusted is greater than the Alloy White Iron；
Second determining module, for determining the case where setting current adjusted is greater than the Alloy White Iron in the judgment module
Under, acquisition can cyclization conclusion.
7. device according to claim 5, which is characterized in that the circulating power current calculation module, comprising:
First computing unit, for calculating circulating power electric current according to the following formula:
Wherein, IxhFor circulating power electric current, Δ U is cyclization pressure difference,For the design impedance of the side m,It is hindered for the system of the side m
It is anti-,For the design impedance of the side p,For the system impedance of the side p.
8. device according to claim 5, which is characterized in that described for carrying current calculation module, comprising:
Power obtaining unit, for obtaining active power and reactive power at each node, wherein by power supply buses and each
The intersection of route is as node where the intersection on road and power supply buses branch and cyclization point；
Second computing unit, for calculating the side m load according to the following formula:
Wherein, PLoadFor the side m load, PmiFor the active power of each node in the side m, j is imaginary part, QmiFor the idle function of each node in the side m
Rate, k are the number of nodes of the side m；
Third computing unit, for the power after calculated load dislocation according to the following formula:
Wherein, PIt movesFor the power after load dislocation,For the system impedance of the side m,For the design impedance of the side m,For the side p
Design impedance,For the system impedance of the side p, i is the node of cyclization point two sides, and n is total node number, PiFor having at node i
Function power, QiFor the reactive power at node i；
4th computing unit, for being calculated according to the following formula for carrying power:
PFor carrying=PIt moves-PLoad；
Wherein, PFor carryingFor for carrying power；
5th computing unit, for being calculated according to the following formula for carrying electric current:
Wherein, IgzFor for carrying electric current, UeFor rated line voltage at cyclization point.
9. a kind of cyclization turns power supply aid decision-making system, which is characterized in that it includes: number that the cyclization, which turns power supply aid decision-making system,
According to processor and data acquisition facility；
The data acquisition facility is connected the data acquisition facility for obtaining with each equipment in Liang Ge substation respectively
It takes the device parameter and operating parameter of each equipment in cyclization point two sides, and the device parameter and operating parameter is sent to described
Data processor；
The data processor includes device described in any one of claim 5~8.
10. system according to claim 9, which is characterized in that the system also includes: data display equipment, the number
It is connected according to display equipment with the data processor, the data display equipment is used to show the data processor output
Conclusion.
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