CN106208083B - A kind of method and device obtaining THE UPFC configuration - Google Patents
A kind of method and device obtaining THE UPFC configuration Download PDFInfo
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- CN106208083B CN106208083B CN201610879312.3A CN201610879312A CN106208083B CN 106208083 B CN106208083 B CN 106208083B CN 201610879312 A CN201610879312 A CN 201610879312A CN 106208083 B CN106208083 B CN 106208083B
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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
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Abstract
An embodiment of the present invention provides a kind of method and devices of acquisition THE UPFC configuration.This method includes：It is distributed according to the trend of circuit, determines the configure the line of at least two THE UPFC UPFC；Determine the method for operation of the UPFC configure the lines and the configuration parameter of UPFC；Accident analysis is carried out to the UPFC configure the lines according to the identified method of operation and configuration parameter, obtains the power flow transfer state of the UPFC configure the lines after a failure；The corresponding UPFC configure the lines of the most preferably described power flow transfer state are determined as final configuration mode.The embodiment of the present invention is distributed rationally by the UPFC of multichannel and a variety of methods of operation, and the balanced trend distribution of section improves thermostabilization nargin, improves ability to transmit electricity to greatest extent.
Description
Technical field
The present invention relates to technical field of power systems, more particularly to a kind of acquisition THE UPFC (Unified
Power Flow Controller, UPFC) configuration method and device.
Background technology
In the evolution of electric system, the advantage of Power System Interconnection gradually displays.Power System Interconnection helps to realize
Two things diametrically opposed to each other and region are complementary, achieve the purpose that more reasonably to utilize the energy.China's power grid has realized national network at present, and
Actively development exchange 1000kV and direct current ± 800kV extra-high voltage projects, purpose are exactly to further strengthen between each power grid
Contact, realize distributing rationally for resource.Also produce that such as interconnection tie power fluctuation, accident are chain involves electricity after Power System Interconnection
The problems such as magnet ring net circulation.These problems bring new challenge to the operation control of power grid, often draw in extreme circumstances
The chain reaction of the system failure is sent out, the range that causes the accident expands.
With further strengthening for China's 500kV main grid structures, the interconnection between each province is strengthened therewith.However,
Near extra-high voltage drop point, trend, which is collected or sent out, more to be concentrated, and the trend in each channel in province's discontinuity surface is caused to be unevenly distributed weighing apparatus.
When N-1 failures (being disconnected after a line fault) occurs for the heavier double-circuit line of trend, power is mainly transferred to and its electricity
Other loop line road on the closer same channel of gas distance, leads to the heavy duty of other loop line road or overload, and due to circuit
The limitation of the thermostabilization limit, trend is unevenly distributed weighing apparatus so that end face causes defeated from making full use of the ability to transmit electricity of circuit between saving
Electric energy power declines.Wherein, the thermostabilization limit is the current-carrying capability of circuit, and the maximum temperature that can bear for a long time by circuit is determined
It is fixed.
UPFC is flexible AC transmitting system (Flexible Alternative Current Transmission
Systems, FACTS) it is most complicated in family be also a kind of most attractive compensator, it combines many FACTS devices
Flexible control means, it is considered to be it is most creative, and the FACTS elements that function is most powerful.UPFC is by one by the change of current
The alternating voltage that device generates is sealed in and is added in power transmission line phase voltage, make its amplitude and phase angle can consecutive variations, to realize line
Road is active and the accurate of reactive power is adjusted, it can be achieved that balanced trend distribution, raising electric network transportation ability and damping system are shaken
The effect swung.
Therefore, rational UPFC configurations how are obtained in power grid and carry out balanced trend distribution, and then are improved power grid and conveyed energy
Power just becomes particularly important.
Invention content
The embodiment of the present invention provides a kind of method and device obtaining unified UPFC configurations, can balanced trend distribution, into
And improve electric network transportation ability.
To solve the above-mentioned problems, the invention discloses a kind of methods of acquisition THE UPFC configuration, including：
It is distributed according to the trend of circuit, determines the configure the line of at least two THE UPFC UPFC；
Determine the method for operation of the UPFC configure the lines and the configuration parameter of UPFC；
Accident analysis is carried out to the UPFC configure the lines according to the identified method of operation and configuration parameter, described in acquisition
The power flow transfer state of UPFC configure the lines after a failure；
The corresponding UPFC configure the lines of the most preferably described power flow transfer state are determined as final configuration mode.
Further, described to be distributed according to the trend of circuit, determine the layout line of at least two THE UPFC UPFC
Road, including：
According to the trend and the thermostabilization limit before the line fault, the load state of the circuit is determined；
According to the trend and the thermostabilization limit after the line fault, the thermostabilization nargin of the circuit is counted；
Determine configuration UPFC's according to the load state and the thermostabilization nargin in the circuit for meeting preset condition
Circuit；
On the circuit of the configuration UPFC, it is distributed according to the highly resistance of the direction of tide of circuit and circuit, described in determination
The installation position of UPFC.
Further, described to be determined according to the load state and the thermostabilization nargin in the circuit for meeting preset condition
The circuit of UPFC is configured, including：
According to the load state and the thermostabilization in the circuit that flexible AC transmitting system FACTS equipment is not configured
Nargin determines the circuit of configuration UPFC.
Further, the method for operation of the determination UPFC configure the lines and the configuration parameter of UPFC, including：
According to the through-flow electric current of the UPFC, the capacity of the reference voltage and the UPFC of the UPFC is determined；
According to the trend distribution of the circuit before the configuration UPFC, the control model and circuit at UPFC series connection end are determined
The initial value of control parameter；
The control model of the UPFC parallel connected ends is determined according to the reactive power exchange of the UPFC and system.
Further, the control model of the UPFC parallel connected ends is to determine Reactive Power Control pattern.
Further, the method for operation determined by the basis and configuration parameter carry out failure point to the UPFC configure the lines
Analysis, obtains the power flow transfer state of the UPFC configure the lines after a failure, including：
According to the identified method of operation and configuration parameter, the double-circuit line trend of the UPFC configure the lines is adjusted, is united
Count the thermostabilization nargin of an other loop line in the double-circuit line after N-1 failures；
Obtain the ratio of the thermostabilization nargin and the UPFC capacity, wherein the ratio is for characterizing the trend
Transfering state.
The invention also discloses a kind of devices of acquisition THE UPFC configuration, including：
Circuit determination unit determines at least two THE UPFC UPFC's for being distributed according to the trend of circuit
Configure the line；
Parameter determination unit, the configuration parameter of the method for operation and UPFC for determining the UPFC configure the lines；
Analytic unit, for carrying out failure to the UPFC configure the lines according to the identified method of operation and configuration parameter
Analysis, obtains the power flow transfer state of the UPFC configure the lines after a failure；
Determination unit is configured, it is final for the corresponding UPFC configure the lines of the most preferably described power flow transfer state to be determined as
Configuration mode.
Further, the circuit determination unit includes：
Determination subelement is loaded, for according to the trend and the thermostabilization limit before the line fault, determining the circuit
Load state；
Subelement is counted, for according to the trend and the thermostabilization limit after the line fault, counting the heat of the circuit
Stability margin；
Route determination subelement, in the circuit for meeting preset condition according to the load state and the thermostabilization
Nargin determines the circuit of configuration UPFC；
Location determination subelement, for the circuit in the configuration UPFC, according to the direction of tide of circuit and circuit
Highly resistance is distributed, and determines the installation position of the UPFC.
Further, the route determination subelement, in the circuit that flexible AC transmitting system FACTS equipment is not configured
The middle circuit that configuration UPFC is determined according to the load state and the thermostabilization nargin.
Further, the parameter determination unit includes：
First determination subelement determines reference voltage and the institute of the UPFC for the through-flow electric current according to the UPFC
State the capacity of UPFC；
Second determination subelement determines the UPFC strings for being distributed according to the trend of the circuit before the configuration UPFC
Join the control model at end and the initial value of circuit control parameter；
Third determination subelement, the control for determining the UPFC parallel connected ends according to the reactive power exchange of the UPFC and system
Molding formula.
Further, the control model of the UPFC parallel connected ends is to determine Reactive Power Control pattern.
Further, the analytic unit includes：
Subelement is adjusted, for according to the identified method of operation and configuration parameter, adjusting the UPFC configure the lines
Double-circuit line trend counts the thermostabilization nargin of an other loop line in the double-circuit line after N-1 failures；
Obtain subelement, the ratio for obtaining the thermostabilization nargin and the UPFC capacity, wherein the ratio is used
In the characterization power flow transfer state.
Compared with prior art, the embodiment of the present invention includes following advantages：
The embodiment of the present invention is distributed rationally by the UPFC of multichannel and a variety of methods of operation, the balanced trend of section
Distribution, improves thermostabilization nargin, improves ability to transmit electricity to greatest extent.
Description of the drawings
Fig. 1 is a kind of step flow chart of the embodiment of the method for acquisition UPFC configurations of the present invention；
Fig. 2 is a kind of step flow chart of the embodiment of the method for acquisition UPFC configuration routes；
Fig. 3 is certain year Hebei electric system rack schematic diagram；
The step of Fig. 4 is the embodiment of the method for a kind of method of operation of determining UPFC configure the lines and the configuration parameter of UPFC
Flow chart；
Fig. 5 is a kind of step flow for the embodiment of the method obtaining the power flow transfer state of UPFC configure the lines after a failure
Figure；
Fig. 6 is that UPFC distributes preceding Lucheng-Xin An N-1 failures rear portion separated time road active power song rationally under certain year basal profile
Line；
Fig. 7 is under certain year basal profile using Lucheng-Xin An N-1 failures rear portion after UPFC configuration methods of the embodiment of the present invention
Separated time road active power curves；
Fig. 8 is a kind of structure diagram of the device embodiment of acquisition THE UPFC configuration；
Fig. 9 is a kind of structure diagram of the embodiment of circuit determination unit；
Figure 10 is a kind of structure diagram of the embodiment of parameter determination unit；
Figure 11 is a kind of structure diagram of the embodiment of analytic unit.
Specific implementation mode
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is described in further detail.
Referring to Fig.1, the step flow chart for showing the embodiment of the method for acquisition UPFC of the present invention a kind of, can specifically wrap
Include following steps：
Step 101, it is distributed according to the trend of circuit, determines at least two UPFC configure the lines.
The embodiment of the present invention is unevenly distributed weighing apparatus to solve important line section tidal current in power grid, to meet the thermostabilization limit
It is required that and the problem of cause section ability to transmit electricity to decline, distributed rationally by the UPFC of multi-line and a variety of methods of operation, it is real
The ability to transmit electricity for improving circuit to greatest extent is showed.
In this step, first have to filter out that be likely to result in important section circuit heavy duty super in existing network system
The circuit of stability limit is overheated, UPFC configurations are then carried out on these circuits, carrys out balanced trend distribution.
The method for determining configure the line has very much, is distributed according to the trend of each circuit to determine that UPFC matches
Set circuit.
As shown in Fig. 2, the method that UPFC configures route is obtained for one of which, including：
Step 201, according to the trend and the thermostabilization limit before line fault, the load state of circuit is determined.
This step is distributed according to the trend before each line fault to determine the loading condition of each circuit first, is that underloading is gone back
It is heavy duty.The trend distribution of circuit can specifically include the trend of circuit and the thermostabilization limit of the circuit.Wherein, line fault
Preceding trend can be obtained by existing tidal current survey (such as RTU, remote terminal terminal, data acquisition device) and computational methods,
It can specifically include one of following or arbitrary combination：Voltage and current (amplitude, phase angle), active power and the idle work(of circuit
Rate etc..The thermostabilization limit of circuit can be arranged according to the thermostabilization limit of circuit itself to be obtained.
After the trend and the thermostabilization limit for knowing each circuit, you can according to the size of trend and its corresponding thermostabilization
Limit size judges the loading condition of circuit, such as can be previously according to settings such as the ratios of trend and the thermostabilization limit
The standard of underloading and load, underloading or heavy duty are divided by each circuit.
Step 202, according to the trend and the thermostabilization limit after line fault, the thermostabilization nargin of circuit is counted.
This step can obtain the trend and the thermostabilization limit of circuit, and then calculate and obtain after N-1 failures occur for circuit
The thermostabilization nargin of circuit.Thermostabilization nargin calculation formula is as follows：
Thermostabilization nargin=1- trends/thermostabilization limit
In the formula, if thermostabilization nargin is more than zero, then it represents that N-1 failures under which, the in addition trend on a loop line road
Level disclosure satisfy that long-term running requirement.If being less than zero, then it represents that under which, in addition the trend level of circuit alreadys exceed
The thermostabilization limit, and will be inversely proportional therewith reduction according to the throughput time beyond horizontal difference, circuit.
It can also be carried out at the same time without inevitable sequencing between step 201 and step 202.
Step 203, determine configuration UPFC's according to load state and thermostabilization nargin in the circuit for meeting preset condition
Circuit.
In this step, in order to avoid influencing each other between different power electronic equipments, string benefit etc. can be not configured
The circuit of configuration UPFC is determined in the circuit of FACTS equipment according to load state and thermostabilization nargin.Specifically, can be lightly loaded
And UPFC circuits are configured on the higher circuit of thermostabilization nargin.
For example, building Hebei electric system research level year mode data as Research foundation, rack schematic diagram such as Fig. 3 institutes
Show.
Wherein Lucheng-Xin An loads 3200MW, and Yangquan-Xibaipo loads 2100MW.It can be seen that the pungent linear load of the Lushui River is heavier, heat is steady
It is relatively low to determine nargin, and Yangquan-Xi Bai line loads are lighter.There is higher thermostabilization nargin in view of Yangquan-Xibaipo circuit, because
And consider in Yangquan-Xibaipo double loop installing UPFC devices and using the tide of its power flowcontrol function optimization Shanxi Ji Sheng discontinuity surface
Flow distribution, to ensure that it is more than thermal stability limit not have heavy-haul line after N-1 failures occur for circuit.
To 500kV circuits in survey region do three forever N-1 analyze, Lucheng station near extra-high voltage drop point, trend send out compared with
To concentrate, each channel trend in province's discontinuity surface is caused to be unevenly distributed.The pungent wire arrangement road post-fault system transient stability in Lucheng-is still
A large amount of power flow transfer to pungent another loop lines of the Lushui River cause Lucheng-Xin Anxianlu to be limited more than thermostabilization.
By the visible Yangquan in other channels-Xibaipo light load on analysis section, fail to make full use of the defeated of circuit
Electric energy power.When N-1 occurs for the heavier double-circuit line of trend, the power transfer born is less and the pungent another loop line heavy duty work(of the Lushui River
Rate is larger, is increased because circuit overheats the steady operation heavier arc sag that generates heat, if handling not in time, it would be possible to cascading failure occur, to being
System operation brings imponderable risk and loss.
Step 204, it on the circuit of configuration UPFC, is distributed, is determined according to the highly resistance of the direction of tide of circuit and circuit
The installation position of UPFC.
In this step, UPFC can be mounted on to the sending end and receiving end of circuit first according to the direction of tide of circuit, and
The case where subsequent classification statistics is mounted on sending end and receiving end.This statistics, it is main to consider that UPFC is separately mounted to sending end or receiving end, it controls
The difference of capacity needed for the effect and UPFC of Line Flow processed.
It can also be distributed according to the existing highly resistance of circuit, UPFC is mounted on line side or bus bar side, and subsequent classification is united
Meter is mounted on the case where line side or bus bar side.This statistics, it is main to consider that UPFC is separately mounted to line side or bus bar side, it controls
The difference of capacity needed for the effect and UPFC of Line Flow.
Specifically, determining the final infields UPFC according to the installed capacity of UPFC and effect.
After determining UPFC configure the lines according to above-mentioned steps, step 102 is continued to execute.
Step 102, the method for operation of UPFC configure the lines and the configuration parameter of UPFC are determined.
In this step it needs to be determined that the initial launch mode of UPFC configure the lines and the initial configuration parameters of UPFC.Specifically
As shown in figure 4, may include：
Step 401, according to the through-flow electric current of UPFC, the reference voltage of UPFC and the capacity of UPFC are determined.
Specifically, after can be according to Load flow calculation, the through-flow electric current of UPFC in power flow solutions, and keeping through-flow electric current big
On the basis of small no more than UPFC capacities of equipment, to determine the series transformer primary side of UPFC and the reference voltage of secondary side
With capacity and the secondary side voltage of the shunt transformer of UPFC.
Step 402, it is distributed according to the trend of the circuit before configuration UPFC, determines the control model and circuit at UPFC series connection end
The initial value of control parameter.
Specifically, be distributed according to the trend of circuit before the requirement of UPFC tide models and configuration UPFC, it can be first by series connection
End control model is set to alignment road power control mode, determines the initial value of the parameters such as circuit control parameter P0, Q0.
Then, according to initial value P0, Q0 of the requirement of UPFC tide models and circuit UPFC control parameters, by the control of series connection end
Molding formula is set to injecting voltage control model, and Load flow calculation obtains the injecting voltage U0 and angle phi 0 of circuit UPFC.
Step 403, the control model of UPFC parallel connected ends is determined according to the reactive power exchange of UPFC and power grid.
According to the reactive power size that parallel connected end after installation UPFC is absorbed from system, to determine the control model of parallel connected end,
Control model in view of determining node voltage is easy to cause that reactive power exchange is excessive, is difficult to control the capacity of UPFC, the parallel connected end
Control model generally determines Reactive Power Control pattern.
It, can be parallel without severe steps sequence between above step 401~403.
Step 103, accident analysis is carried out to UPFC configure the lines according to the identified method of operation and configuration parameter, obtained
The power flow transfer state of UPFC configure the lines after a failure.
It specifically can be with as shown in figure 5, including：
Step 501, according to the identified method of operation and configure parameter adjustment UPFC configure the lines double-circuit line trend,
Count the thermostabilization nargin of an other loop line in double-circuit line after N-1 failures.
Step 502, the ratio of thermostabilization nargin and UPFC capacity is obtained.
Wherein, the ratio of thermostabilization nargin and UPFC capacity can be used for characterizing power flow transfer state.
Thermostabilization nargin/UPFC capacity of multiple UPFC configure the lines can be obtained according to above-mentioned steps 501~502, so
Step 104 is executed afterwards.
Step 104, the corresponding UPFC configure the lines of optimum load flow transfering state are determined as final configuration mode.
This step can be corresponding with the ratio of UPFC capacity by best thermostabilization nargin in each UPFC configure the lines
UPFC configure the lines are determined as final UPFC configuration modes, i.e., in various modes, choose thermostabilization nargin and UPFC capacity
The maximum configuration of ratio, i.e. best configuration.
The embodiment of the present invention is distributed rationally by the UPFC of multichannel and a variety of methods of operation, the balanced trend of section
Distribution, improves thermostabilization nargin, improves ability to transmit electricity to greatest extent.
In another embodiment of the invention, this method can also include：
All section channels are scanned, carrying out UPFC to each section channel according to the method for above-described embodiment distributes rationally, and
Pass through the validity of corresponding failure proof UPFC distributed rationally to improving section ability to transmit electricity.
In the validity distributed rationally to improving section ability to transmit electricity for assessing UPFC, can come in terms of following three
Assessment：
Configure the raising amount of the section Limiting Level of UPFC；The raising amount of different channel configuration UPFC；UPFC is assessed to disconnected
The influence etc. of the face limit.
In a specific example, still to build in a manner of Hebei electric system research level year data as Research foundation, Fig. 3
Shown in for rack schematic diagram.
Using UPFC configuration schemes, it is arranged on light-loaded circuit Yangquan-Xibaipo double loop that Jin Ji saves discontinuity surface
UPFC devices adjust series side voltage magnitude and phase angle, make line by setting the effective power flow and reactive power flow reference value of circuit
Road effective power flow is controlled in designated value.It is no more than thermostabilization constraint to reach after optimization section tidal current distribution meets N-1
Requirement, Yangquan-Xibaipo double loop power flowcontrol of UPFC will be installed in 2*1900MW, to reach the pungent line normal mode of the Lushui River
Lower load reduction occurs to be no more than thermal stability limit after N-1 Fault load flows are transferred to pungent another time of the Lushui River, while being controlled by UPFC
The line power of trend is constant, and then reaches and optimize section tidal current raising thermostabilization nargin and section transmission of electricity energy by installing UPFC
The requirement of power.
Carrying out UPFC, to distribute front and back section tidal current rationally as shown in table 1, before section tidal current is by configuring after configuration UPFC
5360MW is improved to 6140MW, and section ability to transmit electricity improves 14.6%, and trend is less than line after the failure after distributing rationally
The thermal stability limit on road.Fault simulation curve graph is as Figure 6-Figure 7.
The part circuit wattful power that-Xin An N-1 failures in Lucheng are front and back under certain year basal profile of table 1 and UPFC configurations are front and back
Rate contrast table
It should be noted that for embodiment of the method, for simple description, therefore it is all expressed as a series of action group
It closes, but those skilled in the art should understand that, the embodiment of the present invention is not limited by the described action sequence, because according to
According to the embodiment of the present invention, certain steps can be performed in other orders or simultaneously.Secondly, those skilled in the art also should
Know, embodiment described in this description belongs to preferred embodiment, and the involved action not necessarily present invention is implemented
Necessary to example.
With reference to Fig. 8, a kind of structure diagram for the device embodiment obtaining THE UPFC configuration of the present invention is shown,
It can specifically include：
Circuit determination unit 801 determines at least two THE UPFC UPFC for being distributed according to the trend of circuit
Configure the line；
Parameter determination unit 802, the configuration parameter of the method for operation and UPFC for determining the UPFC configure the lines；
Analytic unit 803, for being carried out to the UPFC configure the lines according to the identified method of operation and configuration parameter
Accident analysis obtains the power flow transfer state of the UPFC configure the lines after a failure；
Determination unit 804 is configured, for the corresponding UPFC configure the lines of the most preferably described power flow transfer state to be determined as most
Whole configuration mode.
The embodiment of the present invention realizes that the UPFC of multichannel and a variety of methods of operation is distributed rationally by said units, balanced
The trend distribution of section, improves thermostabilization nargin, improves ability to transmit electricity to greatest extent.
In another embodiment, as shown in figure 9, circuit determination unit 801 may include：
Determination subelement 901 is loaded, for according to the trend and the thermostabilization limit before the line fault, determining the line
The load state on road；
Subelement 902 is counted, for according to the trend and the thermostabilization limit after the line fault, counting the circuit
Thermostabilization nargin；
Route determination subelement 903, in the circuit for meeting preset condition according to the load state and the heat
Stability margin determines the circuit of configuration UPFC；
Location determination subelement 904, for the circuit in the configuration UPFC, according to the direction of tide and circuit of circuit
Highly resistance distribution, determine the installation position of the UPFC.
Wherein, route determination subelement 903, in the circuit that flexible AC transmitting system FACTS equipment is not configured
The circuit of configuration UPFC is determined according to the load state and the thermostabilization nargin.
In another embodiment, as shown in Figure 10, parameter determination unit 802 may include：
First determination subelement 1001 determines the reference voltage of the UPFC for the through-flow electric current according to the UPFC
With the capacity of the UPFC；
Second determination subelement 1002, for being distributed according to the trend of the circuit before the configuration UPFC, described in determination
The control model at UPFC series connection end and the initial value of circuit control parameter；
Third determination subelement 1003, for determining the UPFC parallel connected ends according to the reactive power exchange of the UPFC and system
Control model.
Wherein, the control model of UPFC parallel connected ends can be to determine Reactive Power Control pattern.
In another embodiment, as shown in figure 11, analytic unit 803 may include：
Subelement 1101 is adjusted, for according to the identified method of operation and configuration parameter, adjusting the UPFC layout lines
The double-circuit line trend on road counts the thermostabilization nargin of an other loop line in the double-circuit line after N-1 failures；
Obtain subelement 1102, the ratio for obtaining the thermostabilization nargin and the UPFC capacity, wherein the ratio
Value is for characterizing the power flow transfer state.
For device embodiments, since it is basically similar to the method embodiment, so fairly simple, the correlation of description
Place illustrates referring to the part of embodiment of the method.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with
The difference of other embodiment, the same or similar parts between the embodiments can be referred to each other.
It should be understood by those skilled in the art that, the embodiment of the embodiment of the present invention can be provided as method, apparatus or calculate
Machine program product.Therefore, the embodiment of the present invention can be used complete hardware embodiment, complete software embodiment or combine software and
The form of the embodiment of hardware aspect.Moreover, the embodiment of the present invention can be used one or more wherein include computer can
With in the computer-usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) of program code
The form of the computer program product of implementation.
The embodiment of the present invention be with reference to according to the method for the embodiment of the present invention, terminal device (system) and computer program
The flowchart and/or the block diagram of product describes.It should be understood that flowchart and/or the block diagram can be realized by computer program instructions
In each flow and/or block and flowchart and/or the block diagram in flow and/or box combination.These can be provided
Computer program instructions are set to all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing terminals
Standby processor is to generate a machine so that is held by the processor of computer or other programmable data processing terminal equipments
Capable instruction generates for realizing in one flow of flow chart or multiple flows and/or one box of block diagram or multiple boxes
The device of specified function.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing terminal equipments
In computer-readable memory operate in a specific manner so that instruction stored in the computer readable memory generates packet
The manufacture of command device is included, which realizes in one flow of flow chart or multiple flows and/or one side of block diagram
The function of being specified in frame or multiple boxes.
These computer program instructions can be also loaded into computer or other programmable data processing terminal equipments so that
Series of operation steps are executed on computer or other programmable terminal equipments to generate computer implemented processing, thus
The instruction executed on computer or other programmable terminal equipments is provided for realizing in one flow of flow chart or multiple flows
And/or in one box of block diagram or multiple boxes specify function the step of.
Although the preferred embodiment of the embodiment of the present invention has been described, once a person skilled in the art knows bases
This creative concept, then additional changes and modifications can be made to these embodiments.So the following claims are intended to be interpreted as
Including preferred embodiment and fall into all change and modification of range of embodiment of the invention.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that process, method, article or terminal device including a series of elements not only wrap
Those elements are included, but also include other elements that are not explicitly listed, or further include for this process, method, article
Or the element that terminal device is intrinsic.In the absence of more restrictions, being wanted by what sentence "including a ..." limited
Element, it is not excluded that there is also other identical elements in process, method, article or the terminal device including the element.
Claims (10)
1. a kind of method obtaining THE UPFC configuration, which is characterized in that including：
It is distributed according to the trend of circuit, determines the configure the line of at least two THE UPFC UPFC；
Determine the method for operation of the UPFC configure the lines and the configuration parameter of UPFC；
Accident analysis is carried out to the UPFC configure the lines according to the identified method of operation and configuration parameter, obtains the UPFC
The power flow transfer state of configure the line after a failure；
The corresponding UPFC configure the lines of the most preferably described power flow transfer state are determined as final configuration mode.
2. according to the method described in claim 1, it is characterized in that, described according to the distribution of the trend of circuit, determination at least two
The configure the line of THE UPFC UPFC, including：
According to the trend and the thermostabilization limit before the line fault, the load state of the circuit is determined；
According to the trend and the thermostabilization limit after the line fault, the thermostabilization nargin of the circuit is counted；
The circuit of configuration UPFC is determined according to the load state and the thermostabilization nargin in the circuit for meeting preset condition；
On the circuit of the configuration UPFC, it is distributed according to the highly resistance of the direction of tide of circuit and circuit, determines the UPFC's
Installation position.
3. according to the method described in claim 2, it is characterized in that, described bear in the circuit for meeting preset condition according to described
Load situation and the thermostabilization nargin determine the circuit of configuration UPFC, including：
According to the load state and the thermostabilization nargin in the circuit that flexible AC transmitting system FACTS equipment is not configured
Determine the circuit of configuration UPFC.
4. method as claimed in any of claims 1 to 3, which is characterized in that the determination UPFC layout lines
The method of operation on road and the configuration parameter of UPFC, including：
According to the through-flow electric current of the UPFC, the capacity of the reference voltage and the UPFC of the UPFC is determined；
According to the trend distribution of the circuit before the configuration UPFC, control model and the circuit control at UPFC series connection end are determined
The initial value of parameter；
The control model of the UPFC parallel connected ends is determined according to the reactive power exchange of the UPFC and system.
5. according to the method described in claim 4, it is characterized in that, the control model of the UPFC parallel connected ends is to determine reactive power
Control model.
6. according to the method described in claim 4, it is characterized in that, the method for operation determined by the basis and configuration parameter pair
The UPFC configure the lines carry out accident analysis, obtain the power flow transfer state of the UPFC configure the lines after a failure, including：
According to the identified method of operation and configuration parameter, the double-circuit line trend of the UPFC configure the lines is adjusted, N-1 is counted
After failure in the double-circuit line an other loop line thermostabilization nargin；
Obtain the ratio of the thermostabilization nargin and the UPFC capacity, wherein the ratio is for characterizing the power flow transfer
State.
7. a kind of device obtaining THE UPFC configuration, which is characterized in that including：
Circuit determination unit determines the configuration of at least two THE UPFC UPFC for being distributed according to the trend of circuit
Circuit；
Parameter determination unit, the configuration parameter of the method for operation and UPFC for determining the UPFC configure the lines；
Analytic unit, for carrying out failure point to the UPFC configure the lines according to the identified method of operation and configuration parameter
Analysis, obtains the power flow transfer state of the UPFC configure the lines after a failure；
Determination unit is configured, for the corresponding UPFC configure the lines of the most preferably described power flow transfer state to be determined as final configuration
Mode.
8. device according to claim 7, which is characterized in that the circuit determination unit includes：
Determination subelement is loaded, for according to the trend and the thermostabilization limit before the line fault, determining the negative of the circuit
Load situation；
Subelement is counted, for according to the trend and the thermostabilization limit after the line fault, counting the thermostabilization of the circuit
Nargin；
Route determination subelement, in the circuit for meeting preset condition according to the load state and the thermostabilization nargin
Determine the circuit of configuration UPFC；
Location determination subelement, for the circuit in the configuration UPFC, according to the highly resistance of the direction of tide of circuit and circuit
Distribution, determines the installation position of the UPFC.
9. device according to claim 8, which is characterized in that
The route determination subelement, described in the basis in the circuit that flexible AC transmitting system FACTS equipment is not configured
Load state and the thermostabilization nargin determine the circuit of configuration UPFC.
10. the device according to any one of claim 7 to 9, which is characterized in that the parameter determination unit includes：
First determination subelement, reference voltage for according to the through-flow electric current of the UPFC, determining the UPFC and described
The capacity of UPFC；
Second determination subelement determines UPFC series connection end for being distributed according to the trend of the circuit before the configuration UPFC
Control model and circuit control parameter initial value；
Third determination subelement, the control mould for determining the UPFC parallel connected ends according to the reactive power exchange of the UPFC and system
Formula；
The control model of the UPFC parallel connected ends is to determine Reactive Power Control pattern；
The analytic unit includes：
Subelement is adjusted, for according to the identified method of operation and configuration parameter, adjusting the double back of the UPFC configure the lines
Line Flow counts the thermostabilization nargin of an other loop line in the double-circuit line after N-1 failures；
Obtain subelement, the ratio for obtaining the thermostabilization nargin and the UPFC capacity, wherein the ratio is used for table
Levy the power flow transfer state.
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| CN108306300B (en) * | 2018-01-30 | 2020-09-01 | 中国电力科学研究院有限公司 | Method and system for determining capacity of unified power flow controller on main network section |
| CN111564846A (en) * | 2020-05-21 | 2020-08-21 | 国网江西省电力有限公司电力科学研究院 | Green scheduling-oriented power flow optimization control method |
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