CN109802417A - Reply DC Line Fault impacts the power grid emergency control method and device of weak communication channel - Google Patents
Reply DC Line Fault impacts the power grid emergency control method and device of weak communication channel Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The present invention provides power grid emergency control methods and device that a kind of reply DC Line Fault impacts weak communication channel, comprising: machine limit value is always cut in the general surplus power of overall power loss and weak communication channel after locking failure occurs simultaneously according to more DC lines, determination；Machine demand is cut according to the minimum for occurring to be latched each DC line of failure simultaneously, determines that machine amount distribution coefficient is cut in the addition of every DC line；Machine amount distribution coefficient is cut according to the addition for always cutting machine limit value and every DC line, determines that machine amount is cut in the addition of every DC line, and execute and cut machine control.The adaptability cut machine demand when cutting machine demand and more direct currents while being latched failure, have to multiple faults scene when technical solution provided by the invention can take into account single direct current locking failure；Principle is simple, reliable and stable, operability and practical；Practical value with higher and good market prospects.
Description
Technical field
The present invention relates to a kind of methods of electric power system stability control technical field, and in particular to a kind of reply DC Line Fault
Impact the power grid emergency control method and device of weak communication channel.
Background technique
The feature of contrary distribution is presented in energy resources and load center at present, this is objectively determining current power grid pattern
Have many characteristics, such as big power supply, bulk power grid, large capacity, long distance power transmission.Remote trans-regional HVDC Transmission Technology is held with its conveying
Amount is big, quickly controllable, effective limiting short-circuit current the features such as, it is existing insufficient to compensate for conventional AC transmission of electricity, has obtained extensively
Development.
With the intensive operation of extra-high voltage direct-current transmission engineering, there are following alternating current-direct current typical case power transmission scenes: sending
Exchange weak service channel electricity sent outside with single by a plurality of direct current, in the receiving-end system of a plurality of DC line feed-in, drop point position
It is closer to set spacing, these direct currents can be caused when catastrophe failure occurs for receiving-end system while being latched, is brought to sending very big
Impact.Single direct current locking fault scenes are only considered when previous direct current Safety system design, are closed simultaneously when a plurality of direct current occurs
Failure is locked, is existed because machine amount deficiency is cut in peace control, the superposition of surplus power, which is transferred to, exchanges the wind that weak service channel causes route off-the-line
Danger.
Accordingly, it is desirable to provide a kind of reply DC Line Fault impacts the power grid emergency control method of weak communication channel and device comes
It solves the above problems.
Summary of the invention
Work as the prior art and a plurality of direct current occurs while being latched failure, exists because machine amount deficiency, surplus power are cut in peace control
Superposition, which is transferred to, exchanges the risk that weak service channel causes route off-the-line, and the invention proposes a kind of impact of reply DC Line Fault is weak
The power grid emergency control method and device of communication channel fully consider the steady state stability limit constraint condition of weak communication channel, guarantee foot
Enough cuts machine amount, and weak communication channel off-the-line asks when solution tradition peace control cuts more direct currents that machine method does not consider while being latched failure
Topic.
A kind of reply DC Line Fault impacts the power grid emergency control method of weak communication channel, comprising:
The general surplus power of overall power loss and weak communication channel after locking failure occurs simultaneously according to more DC lines,
Machine limit value is always cut in determination；
Machine demand is cut according to the minimum for occurring to be latched each DC line of failure simultaneously, determines chasing after for every DC line
Add and cuts machine amount distribution coefficient；
Machine amount distribution coefficient is cut according to the addition for always cutting machine limit value and every DC line, determines every DC line
Addition cut machine amount, and execute and cut machine control.
Further, it is described according to more DC lines simultaneously occur be latched failure after overall power loss and weak communication channel
General surplus power, determination always cut machine limit value, comprising:
It is calculated as follows and described always cuts machine limit value:
Pgc_dem=Ploss-Pa_sum
Wherein, Pgc_demAlways to cut machine limit value；PlossFor the overall power loss after failure；Pa_sumFor the total of weak communication channel
Surplus power.
Further, the calculating formula of the overall power loss after the failure is as follows:
Wherein, PdciFor DC operation power；M is while the AC line travel permit number for being latched failure occurs, and m≤n, n are direct current
Route total number；
The calculating formula of the general surplus power of the weak communication channel is as follows:
Pa_sum=kc×(Pst-Ptie0)
Wherein, kcFor nargin coefficient；PstFor the steady state stability limit of weak communication channel；Ptie0For weak communication channel power initial value.
Further, the minimum that each DC line of failure occurs to be latched simultaneously for the basis cuts machine demand, determines every
Machine amount distribution coefficient is cut in the addition of DC line, comprising:
Machine demand is cut according to the minimum for occurring to be latched each DC line of failure simultaneously, each DC line residue is calculated and cuts
Machine amount；
Machine amount is cut according to each DC line residue, determines that machine amount distribution coefficient is cut in the addition of every DC line.
Further, the minimum that each DC line of failure occurs to be latched simultaneously for the basis cuts machine demand, calculates each
DC line residue cuts machine amount, comprising:
Each DC line residue is calculated as follows and cuts machine amount:
Pgc_fi=Pgc_supi-Pgc_Ai
Wherein, Pgc_fiMachine amount is cut for each DC line residue；Pgc_supiIt is current operating conditions for cutting machine amount；Pgc_AiFor
The minimum of each DC line cuts machine demand.
Further, described that machine amount is cut according to each DC line residue, determine that machine is cut in the addition of every DC line
Measure distribution coefficient, comprising:
Machine amount distribution coefficient is cut in the addition that every DC line is calculated as follows:
Wherein, m is while the AC line travel permit number for being latched failure occurs, and m≤n, n are DC line total number.
Further, described that machine amount distribution coefficient is cut according to the addition for always cutting machine limit value and every DC line, really
Machine amount is cut in the addition of fixed every DC line, and is executed and cut machine control, comprising:
Machine amount is cut in the addition that every DC line is calculated as follows:
Wherein, Pgc_inciMachine amount is cut for the addition of every direct current；LiMachine amount distribution coefficient is cut for addition；Pgc_demAlways to cut machine
Limit value；Pgc_AiMachine demand is cut for minimum；M is while the AC line travel permit number for being latched failure occurs, and m≤n, n are DC line
Total number.
A kind of reply DC Line Fault impacts the power grid emergence control of weak communication channel, comprising:
Always cut machine module, for according to more DC lines simultaneously occur be latched failure after overall power loss with it is weak exchange lead to
Machine limit value is always cut in the general surplus power in road, determination；
Distribution coefficient module, for cutting machine demand according to the minimum for occurring to be latched each DC line of failure simultaneously, really
Machine amount distribution coefficient is cut in the addition of fixed every DC line；
Execution module, for cutting machine amount distribution coefficient according to the addition for always cutting machine limit value and every DC line, really
Machine amount is cut in the addition of fixed every DC line, and is executed and cut machine control.
A kind of reply DC Line Fault impacts the power grid emergency control method of weak communication channel:
If locking failure occurs for single DC line, the execution of machine demand is cut according to the minimum of the DC line and cuts machine control
System；
If a plurality of DC line occurs to be latched failure simultaneously, executed using method as claimed in claim 1
Cut machine control.
Further, if locking failure occurs for the single DC line, machine need are cut according to the minimum of the DC line
Machine control is cut in the amount of asking execution, comprising:
Judge under single direct current locking failure whether cut machine amount abundant, if then carrying out in next step, otherwise alerting；
The minimum for meeting safety and stability needs when calculating single direct current locking failure cuts machine demand.
Further, it is described judge under single direct current locking failure whether cut machine amount abundant, comprising: relatively more current operation
State is for cutting machine amount Pgc_supiWith DC operation power Pdci；
If Pgc_supi< Pdci, then it is not abundant to cut machine amount, and the insufficient alarm prompt of machine amount is cut in sending；Otherwise it is abundant to cut machine amount.
A kind of reply DC Line Fault impacts the power grid emergence control of weak communication channel, comprising:
Single direct current lock modules, if locking failure occurs for single DC line, most according to the DC line
It is small cut machine demand execution cut machine control；
More direct current lock modules, if occurring to be latched failure simultaneously for a plurality of DC line, using such as claim 1-7
Machine control is cut in any method execution.
Compared with the latest prior art, technical solution provided by the invention has the advantages that
1, technical solution provided by the invention fully considers the steady state stability limit constraint condition of weak communication channel, guarantees foot
Enough cuts machine amount, and weak communication channel off-the-line asks when solution tradition peace control cuts more direct currents that machine method does not consider while being latched failure
Topic.
2, when technical solution provided by the invention can take into account single direct current locking failure cut machine demand and more direct currents are same
When locking failure when cut machine demand, have to the adaptability of multiple faults scene.
3, technical solution provided by the invention has the advantages that simple principle, reliable and stable, operability and practical,
Practical value with higher and good market prospects.
Detailed description of the invention
Fig. 1 is flow chart of the present invention；
Fig. 2 is the process for the power grid emergency control method that reply DC Line Fault impacts weak communication channel in the embodiment of the present invention
Figure；
Fig. 3 is regional power grid grid structure schematic diagram；
Fig. 4 be DC Line Fault after take the corresponding interconnection active power curves figure of emergency control method.
Specific embodiment
The present invention is described in further details with reference to the accompanying drawing.For purpose, the technical solution for making the embodiment of the present invention
Clearer with advantage, following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out
It clearly and completely describes, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
Its embodiment, shall fall within the protection scope of the present invention.
Fig. 1 is flow chart of the present invention, and a kind of reply DC Line Fault impacts the power grid emergency control method of weak communication channel, packet
It includes:
The general surplus power of overall power loss and weak communication channel after locking failure occurs simultaneously according to more DC lines,
Machine limit value is always cut in determination；
Machine demand is cut according to the minimum for occurring to be latched each DC line of failure simultaneously, determines chasing after for every DC line
Add and cuts machine amount distribution coefficient；
Machine amount distribution coefficient is cut according to the addition for always cutting machine limit value and every DC line, determines every DC line
Addition cut machine amount, and execute and cut machine control.
As shown in Fig. 2, Fig. 2 is the flow chart of the emergency control method of weak communication channel off-the-line under the more DC Line Faults of reply；
The method of the present invention includes the following steps:
Step 1: building reply DC Line Fault impacts the power grid emergency control system of weak communication channel；
Step 2: the steady state stability limit and general surplus power tolerance value of current weak communication channel are calculated；
Step 3: judge to cut whether machine amount fills under single direct current locking failure with machine amount can be cut according to single dc power
It is abundant；
Step 4: the minimum for meeting safety and stability needs when determining single direct current locking failure cuts machine demand；
Step 5: it calculates the peace control when simultaneously failure occurs to be latched for a plurality of direct current and cuts machine amount；
Step 6: power grid emergency control system judges fault message, and machine order is cut in execution.
In step 1, in control centre, configuring direct current safety and stability cuts machine control master station, sends the configuration of type direct current outside a plurality of
Respective safety and stability cuts machine control main website, cuts machine in the configuration of direct current near region power plant and executes station, configures and measure in weak communication channel
Substation, establish a communications link between each control unit channel.
Direct current safety and stability cuts machine control master station and obtains direct current power transmission power information that each DC control main website is sent and right
That answers cuts unit total amount information, and receive the unit of the weak communication channel access that weak communication channel measurement substation is sent, main transformer,
The state and channel power the information whether elements such as string benefit run.
Direct current safety and stability cuts machine control main website and receives the power information that the operating unit that machine execution station is sent is cut by power plant, prison
Survey itself direct current whether failure, and fault message is sent to control master station, receives the addition sent of master station and cut machine order, to cutting
Machine executes station transmission and cuts machine order.
It cuts the order execution that machine execution station is sent according to main website and cuts machine operation.
In step 2, the steady state stability limit and general surplus power tolerance value of current weak communication channel are calculated, comprising the following steps:
S201, weak communication channel power initial value P is obtained by measurement substationtie0；
The state whether elements such as S202, the unit for considering weak communication channel access, main transformer, string benefit run, using sending end
The engineering calculating method for increasing unit output, receiving end reduction unit output, carries out time-domain-simulation, calculates current weak communication channel
Steady state stability limit Pst；
S203, the general surplus power tolerance value P for determining communication channela_sum=kc×(Pst-Ptie0), wherein kcFor nargin system
Number, generally desirable 0.9；
In step 3, for sending type direct current outside in region, machine control main website is cut by direct current safety and stability and is more currently transported
Row state is for cutting machine amount Pgc_supiWith DC operation power PdciIf Pgc_supi< Pdci, then sending is cut the insufficient alarm of machine amount and is mentioned
Show, otherwise carries out in next step；
In step 4, for sending type direct current outside in region, generator rotor angle unstability, voltage stabilization does not occur according near region, does not send out
The not requirement such as off-the-line of raw extensive blower off-grid phenomenon, weak communication channel, is based on time-domain simulation method, steady by the safety of each direct current
Surely it cuts the respective minimum of machine control main website calculating and cuts machine demand Pgc_Ai, and calculate residue and can cut machine amount Pgc_fi=Pgc_supi-
Pgc_Ai；
In step 5, calculates the peace control when simultaneously failure occurs to be latched for a plurality of direct current and cuts machine amount, comprising the following steps:
S501, fault message is collected by control master station, it is total after calculating failure if m direct current breaks down (m≤n) simultaneously
Power loss
Machine limit value P is always cut in S502, determinationgc_dem=Ploss-Pa_sum；
Machine amount distribution coefficient is cut in S503, the addition for calculating every direct currentIt can be cut by every direct current residue
Machine amount Pgc_fiRatio be allocated；
Machine amount is cut in S504, the addition for calculating every direct current
In step 6, power grid emergency control system judges fault message, and machine order is cut in execution, comprising the following steps:
S601, direct current safety and stability cut machine control main website and monitor whether this direct current occurs to be latched failure, if monitored,
Machine demand P is cut by minimumgc_AiMachine order is cut in execution, and is cut machine control master station to direct current safety and stability and sent fault message；
S602, direct current safety and stability cut machine control master station and receive the direct current event that direct current safety and stability cuts the transmission of machine control main website
Hinder information, when monitoring a plurality of direct current while being latched failure, cuts the transmission of machine control main website to each related direct current safety and stability and cut
Except machine amount P is cut in additiongc_inciOrder；
S603, direct current safety and stability cut machine control main website receive direct current safety and stability cut machine control master station send excision chase after
Add and cuts machine amount Pgc_inciOrder, is practiced, guarantees the safe and stable operation of weak communication channel and system.
According to the above method, in conjunction with being described further for practical certain regional power grid A.The signal of regional power grid grid structure
Figure is as shown in Figure 3.
Under regional power grid A typical operation modes, it is connected with regional power grid B by single time extra-high-voltage alternating current interconnection, directly
Stream 1, direct current 2 are simultaneously to region C power transmission, and direct current 3, direct current 4, direct current 5 are from region external power grid by electricity.It is handed under typical operation modes straight
It is as shown in table 1 to flow power.Only consider that communication channel steady state stability limit determines that two are sent outside under the scene of type direct current simultaneous faults, peace
The calculating process of machine amount is cut in control.
1 typical operation modes of table
The emergency control method of weak communication channel off-the-line includes the following steps: under the more DC Line Faults of reply provided by the invention
In step 1, building reply DC Line Fault impacts the power grid emergency control system of weak communication channel, in control centre
Configuring direct current safety and stability cuts machine control master station, configures respective safety and stability in direct current 1, direct current 2 respectively and cuts machine control main website,
Cut machine in direct current 1, the configuration of 2 near region power plant of direct current and execute station, measure substation in the configuration of weak communication channel, and each control unit it
Between establish a communications link channel.
In step 2, the steady state stability limit and general surplus power tolerance value of current weak communication channel are calculated, comprising the following steps:
S201, weak communication channel power initial value P is obtained by measurement substationtie0=5000MW；
S202, consider the unit that weak communication channel nearby accesses do not put into operation, extra-high voltage station each 2 main transformers, extra-high voltages
Stand two sides string mend puts into operation, using increase system A unit output, reduce system B unit output engineering calculating method, into
Row time-domain-simulation, is calculated, the steady state stability limit P of current weak communication channelst=7000MW；
S203, the general surplus power P for determining communication channela_sum=kc×(Pst-Ptie0)=0.9 × (7000-5000)=
1800MW；
In step 3 outside, type direct current is sent for 2 in region, it is more current to cut machine control main website by direct current safety and stability
Operating status is for cutting machine amount Pgc_supiWith the relationship of DC operation power；
Direct current 1:
Pgc_sup1=5080MW > Pdc1=5000MW
Direct current 2:
Pgc_sup2=8600MW > Pdc2=7500MW
Two direct currents are all larger than dc power for cutting machine amount, can carry out in next step；
In step 4, for 2 positive direction direct currents in region, generator rotor angle unstability, voltage stabilization does not occur according near region, no
The not requirement such as off-the-line of extensive blower off-grid phenomenon, weak communication channel occurs, is based on time-domain simulation method, is calculated:
Direct current 1:
Minimum cuts machine demand Pgc_A1=3180MW；
Residue cuts machine amount Pgc_f1=Pgc_sup1-Pgc_A1=5080-3180=1900MW；
Direct current 2:
Minimum cuts machine demand Pgc_A2=4640MW；
Residue cuts machine amount Pgc_f2=Pgc_sup2-Pgc_A2=8600-4640=3960MW；
In step 5, calculates peace control when a plurality of same receiving end direct current is latched simultaneously and cuts machine scheme, comprising the following steps:
S501, fault message is collected by control master station, if 2 direct currents break down simultaneously, general power is damaged after calculating failure
It loses
Machine limit value P is always cut in S502, determinationgc_dem=Ploss-Pa_sum=12500-1800=10700MW；
Every S503, calculating the additional of direct current cut machine amount distribution coefficient Li
Direct current 1:
Direct current 2:
Machine amount P is cut in S504, the addition for calculating every direct currentgc_inci；
Direct current 1:
Direct current 2:
In step 6, control system judges fault message, and machine order is cut in execution, comprising the following steps:
S601, direct current 1, direct current 2 control main website and monitor whether itself direct current occurs to be latched failure, if monitored,
Machine demand P is cut by respective minimumgc_A1=3180MW, Pgc_A2Machine order is cut in=4640MW execution, and is cut to direct current safety and stability
Machine controls master station and sends fault message；
S602, direct current safety and stability cut machine control master station and receive the direct current event that direct current safety and stability cuts the transmission of machine control main website
Hinder information, when monitoring 2 direct currents while being latched failure, cuts machine control main website to each related direct current safety and stability and send excision
Machine amount P is cut in additiongc_inc1=922MW, Pgc_inc2The order of=1958MW；
S603, direct current safety and stability cut machine control main website receive direct current safety and stability cut machine control master station send cut
Machine amount P is cut except additionalgc_inc1=922MW, Pgc_inc2=1958MW order, is practiced, it is ensured that weak communication channel and system
Safe and stable operation.
Take the corresponding interconnection active power curves figure of emergency control method as shown in Figure 4 after DC Line Fault.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, to the greatest extent
Invention is explained in detail referring to above-described embodiment for pipe, it should be understood by those ordinary skilled in the art that: still
It can be with modifications or equivalent substitutions are made to specific embodiments of the invention, and without departing from any of spirit and scope of the invention
Modification or equivalent replacement, are intended to be within the scope of the claims of the invention.
Claims (12)
1. the power grid emergency control method that a kind of reply DC Line Fault impacts weak communication channel characterized by comprising
The general surplus power of overall power loss and weak communication channel after locking failure occurs simultaneously according to more DC lines, determines
Always cut machine limit value；
Machine demand is cut according to the minimum for occurring to be latched each DC line of failure simultaneously, determines that the addition of every DC line is cut
Machine amount distribution coefficient；
Machine amount distribution coefficient is cut according to the addition for always cutting machine limit value and every DC line, determines chasing after for every DC line
Add machine amount of cutting, and executes and cut machine control.
2. a kind of reply DC Line Fault as described in claim 1 impacts the power grid emergency control method of weak communication channel, special
Sign is, the consolidated profit & loss complementary work of the overall power loss occurred to be latched simultaneously according to more DC lines after failure and weak communication channel
Machine limit value is always cut in rate, determination, comprising:
It is calculated as follows and described always cuts machine limit value:
Pgc_dem=Ploss-Pa_sum
Wherein, Pgc_demAlways to cut machine limit value；PlossFor the overall power loss after failure；Pa_sumFor the general surplus of weak communication channel
Power.
3. a kind of reply DC Line Fault as claimed in claim 2 impacts the power grid emergency control method of weak communication channel, special
Sign is,
The calculating formula of overall power loss after the failure is as follows:
Wherein, PdciFor DC operation power；M is while the AC line travel permit number for being latched failure occurs, and m≤n, n are DC line
Total number；
The calculating formula of the general surplus power of the weak communication channel is as follows:
Pa_sum=kc×(Pst-Ptie0)
Wherein, kcFor nargin coefficient；PstFor the steady state stability limit of weak communication channel；Ptie0For weak communication channel power initial value.
4. a kind of reply DC Line Fault as described in claim 1 impacts the power grid emergency control method of weak communication channel, special
Sign is that the minimum that each DC line of failure occurs to be latched simultaneously for the basis cuts machine demand, determines every DC line
Addition cut machine amount distribution coefficient, comprising:
Machine demand is cut according to the minimum for occurring to be latched each DC line of failure simultaneously, each DC line residue is calculated and cuts machine
Amount；
Machine amount is cut according to each DC line residue, determines that machine amount distribution coefficient is cut in the addition of every DC line.
5. a kind of reply DC Line Fault as claimed in claim 4 impacts the power grid emergency control method of weak communication channel, special
Sign is that the minimum that each DC line of failure occurs to be latched simultaneously for the basis cuts machine demand, and it is surplus to calculate each DC line
Cotangent machine amount, comprising:
Each DC line residue is calculated as follows and cuts machine amount:
Pgc_fi=Pgc_supi-Pgc_Ai
Wherein, Pgc_fiMachine amount is cut for each DC line residue；Pgc_supiIt is current operating conditions for cutting machine amount；Pgc_AiIt is each straight
The minimum of Flow Line cuts machine demand.
6. a kind of reply DC Line Fault as claimed in claim 5 impacts the power grid emergency control method of weak communication channel, special
Sign is, described to cut machine amount according to each DC line residue, determines that machine amount distribution coefficient is cut in the addition of every DC line,
Include:
Machine amount distribution coefficient is cut in the addition that every DC line is calculated as follows:
Wherein, m is while the AC line travel permit number for being latched failure occurs, and m≤n, n are DC line total number.
7. a kind of reply DC Line Fault as described in claim 1 impacts the power grid emergency control method of weak communication channel, special
Sign is, described to cut machine amount distribution coefficient according to the addition for always cutting machine limit value and every DC line, determines every direct current
Machine amount is cut in the addition of route, and is executed and cut machine control, comprising:
Machine amount is cut in the addition that every DC line is calculated as follows:
Wherein, Pgc_inciMachine amount is cut for the addition of every direct current；LiMachine amount distribution coefficient is cut for addition；Pgc_demAlways to cut machine limit
Value；Pgc_AiMachine demand is cut for minimum；M is while the AC line travel permit number for being latched failure occurs, and m≤n, n are that DC line is total
Item number.
8. the power grid emergence control that a kind of reply DC Line Fault impacts weak communication channel characterized by comprising
Machine module is always cut, for occurring to be latched overall power loss and weak communication channel after failure simultaneously according to more DC lines
Machine limit value is always cut in general surplus power, determination；
Distribution coefficient module determines every for cutting machine demand according to the minimum for occurring to be latched each DC line of failure simultaneously
Machine amount distribution coefficient is cut in the addition of DC line；
Execution module determines every for cutting machine amount distribution coefficient according to the addition for always cutting machine limit value and every DC line
Machine amount is cut in the addition of DC line, and is executed and cut machine control.
9. the power grid emergency control method that a kind of reply DC Line Fault impacts weak communication channel, it is characterised in that:
If locking failure occurs for single DC line, the execution of machine demand is cut according to the minimum of the DC line and cuts machine control；
If a plurality of DC line occurs to be latched failure simultaneously, machine is cut using method as claimed in claim 1 execution
Control.
10. a kind of reply DC Line Fault as claimed in claim 9 impacts the power grid emergency control method of weak communication channel, special
Sign is, if locking failure occurs for the single DC line, cuts the execution of machine demand according to the minimum of the DC line and cuts
Machine control, comprising:
Judge under single direct current locking failure whether cut machine amount abundant, if then carrying out in next step, otherwise alerting；
The minimum for meeting safety and stability needs when calculating single direct current locking failure cuts machine demand.
11. a kind of reply DC Line Fault as claimed in claim 10 impacts the power grid emergency control method of weak communication channel,
Be characterized in that, it is described judge under single direct current locking failure whether cut machine amount abundant, comprising: compare current operating conditions for
Cut machine amount Pgc_supiWith DC operation power Pdci；
If Pgc_supi< Pdci, then it is not abundant to cut machine amount, and the insufficient alarm prompt of machine amount is cut in sending；Otherwise it is abundant to cut machine amount.
12. the power grid emergence control that a kind of reply DC Line Fault impacts weak communication channel characterized by comprising
Single direct current lock modules are cut if locking failure occurs for single DC line according to the minimum of the DC line
Machine control is cut in the execution of machine demand；
More direct current lock modules, it is any using such as claim 1-7 if occurring to be latched failure simultaneously for a plurality of DC line
Machine control is cut in the method execution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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