CN105207244B - Detection can feed-in receiving end AC system direct current scale method and system - Google Patents
Detection can feed-in receiving end AC system direct current scale method and system Download PDFInfo
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- CN105207244B CN105207244B CN201510564174.5A CN201510564174A CN105207244B CN 105207244 B CN105207244 B CN 105207244B CN 201510564174 A CN201510564174 A CN 201510564174A CN 105207244 B CN105207244 B CN 105207244B
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Abstract
The present invention relates to a kind of method and system for detecting receiving end AC system feed-in direct current transportation scale.Method includes：Based on the balance of electric power and ener result of each subregion of power network, determine that power network receiving end AC system needs the direct current of feed-in to return number N, select the direct current drop point of every time direct current；Calculate the interaction index of each direct current, according to interaction index successively from N return direct current in selection can feed-in K return direct currents；Calculate feed-in K to return after direct current, many effective short-circuit ratioes of feed-in are compared, judge whether receiving end AC system can bear the direct current feed-in by the effective short-circuit ratio of many feed-ins of the direct current of all feed-ins with predetermined threshold value；If so, checking the stability that K returns power network after direct current feed-in according to judged result, if meeting grid stability condition, receive K and return direct current feed-in；By all direct currents for meeting grid stability condition be set to can feed-in receiving end AC system direct current scale.
Description
Technical field
The present invention relates to technical field of electric power, more particularly to detection can feed-in receiving end AC system direct current scale side
Method and system.
Background technology
HVDC Transmission Technology is particularly suitable for high-power, long distance power transmission, for the thousands of kilometers of transmission distance, transmission capacity
Up to ten million kilowatts of the West-to-East Electricity Transmission Project, can realize long distance power transmission using direct current transportation.When DC transmission system feed-in exchange
When in system, the interaction property between ac and dc systemses will become considerably complicated, and distant view year load intensive area may go out
The situation of existing feed-in multiple-circuit line, it is this under the conditions of, if after receiving end AC system voltage support scarce capacity, fault in ac transmission system
Recover difficulty to increase, alternating current-direct current influences each other outstanding problem, the performance of whole power network will be influenceed.Therefore, how to be handed over according to receiving end
Streaming system voltage support ability, determine receiving end AC system can feed-in direct current scale, be the major issue that Electric Power Network Planning need to be solved.
At present, Electric Power Network Planning personnel typically rule of thumb detection can feed-in receiving end AC system direct current scale, Ran Houzai
Stability check is carried out, if wanting to determine optimal direct current transportation planning, just effectively evaluating can only be lacked by continuous trial and error
Index, inefficiency.Although domestic and foreign scholars are proposed using the effective short-circuit ratio index of many feed-ins and its threshold value as alternating current-direct current
The strong and weak evaluation index of receiving end AC system in parallel running power network, but this index is not applied to and instructs power network to advise in practice
Draw.In actual applications, how effectively to detect can the direct current scale of feed-in receiving end AC system be current direct current transportation planning
The major issue faced.
The content of the invention
Based on this, it is necessary to for prior art efficiency it is low the problem of there is provided one kind detection can feed-in receiving end AC system
Direct current scale method and system.
A kind of detection can feed-in receiving end AC system direct current scale method, comprise the following steps：
Based on the balance of electric power and ener result of each subregion of power network, determine that power network receiving end AC system needs the direct current of feed-in to return number
N, selectes the direct current drop point of every time direct current；N is positive integer；
The interaction index of each direct current is calculated, and is selected successively from N times direct currents according to the interaction index of each direct current
Select receiving end AC system can feed-in K return direct currents；1≤K≤N；
Calculate receiving end AC system feed-in K to return after direct current, all direct currents of feed-in receiving end AC system are fed with more
Short-circuit ratio is imitated, many effective short-circuit ratioes of feed-in are compared with presetting many effective short-circuit ratio threshold values of feed-in, judges that receiving end is handed over
Whether streaming system can bear K and return direct current feed-in；If so, then entering next step；
The stability that K returns power network after direct current feed-in is checked according to judged result, if meeting grid stability condition, connect
Direct current feed-in is returned by K；
By all direct currents for meeting grid stability condition be set to can feed-in receiving end AC system direct current scale.
A kind of detection can feed-in receiving end AC system direct current website system, including：
Determining device, for the balance of electric power and ener result based on each subregion of power network, determines that power network receiving end AC system is needed
The direct current of feed-in returns number N, selectes the direct current drop point of every time direct current；N is positive integer；
Selection device, the interaction index for calculating each direct current, and according to the interaction index of each direct current successively
From N return direct current in selection receiving end AC system can the K of feed-in return direct currents；1≤K≤N；
Judgment means, are returned after direct currents for calculating receiving end AC system feed-in K, feed-in receiving end AC system it is all straight
The effective short-circuit ratio of many feed-ins of stream, many effective short-circuit ratioes of feed-in are compared with presetting many effective short-circuit ratio threshold values of feed-in
Compared with, judge receiving end AC system whether can bear K return direct current feed-in；If so, then performing the function of capacity checking device；
Capacity checking device, for checking the stability that K returns power network after direct current feed-in according to judged result, if it is steady to meet power network
Qualitative condition, then receive K and return direct current feed-in；
Setting device, for by all direct currents for meeting grid stability condition be set to can feed-in receiving end AC system it is straight
Stream scale.
Above-mentioned detection can feed-in receiving end AC system direct current scale method and system, the effective short-circuit ratio of many feed-ins is referred to
Mark applies in actual electric network planning, by the way that the effective short-circuit ratio index of many feed-ins of all feed-in direct currents is fed with more with default
Effect short-circuit ratio metrics-thresholds are compared, and judge whether receiving end AC system can bear the direct current feed-in, improving detection can
The efficiency of the direct current scale of feed-in receiving end AC system.
Brief description of the drawings
Fig. 1 for one embodiment detection can feed-in receiving end AC system direct current scale method flow diagram；
Fig. 2 judges whether receiving end AC system can bear the method flow diagram that K returns direct current feed-in for one embodiment；
Fig. 3 for one embodiment detection can feed-in receiving end AC system direct current scale system structure diagram；
Fig. 4 is one embodiment for judging whether receiving end AC system can bear the device of K times direct current feed-ins
Structural representation.
Embodiment
Technical scheme is described further with reference to accompanying drawing of the present invention.
Fig. 1 for one embodiment detection can feed-in receiving end AC system direct current scale method flow diagram, including with
Lower step：
S1, based on the balance of electric power and ener result of each subregion of power network, determines that power network receiving end AC system needs the direct current of feed-in
Number N is returned, the direct current drop point of every time direct current is selected；N is positive integer；
Direct current scale described in this step and full text remaining part can be characterized with D.C. capacity.
In this step, the balance of electric power and ener result, i.e., the difference being available between electric power and power load of each subregion
Value, and can be between delivery and power consumption difference.
Based on the balance of electric power and ener result of each subregion of power network, determine that power network receiving end AC system needs the direct current of feed-in always to hold
Amount, single time D.C. capacity, and direct current time number N is obtained according to direct current total capacity, single time D.C. capacity.
The direct current drop point can dissolve principle nearby to select according to electric power, and now direct current drop point pays the utmost attention to electric power vacancy
Larger region.Or, can consider system by electric energy power, whether occur congestion phenomenon, voltage stability, overvoltage etc. come
Select direct current drop point.In addition, also needing to take into account the economy of system operation during selection direct current drop point.
S2, calculates the interaction index of each direct current, and according to the interaction index of each direct current successively from N returns direct current
Select receiving end AC system can the K of feed-in return direct currents；1≤K≤N；
This step is returned to N by calculating direct current interaction index and it is expected that the direct current of feed-ins carries out priority ranking, so that
Being prevented effectively from influences the larger too early feed-in of direct current on the stabilization of power grids, hinders follow-up direct current feed-in, reduction power network can feed-in direct current
Scale.Direct current interaction index may include：
(a) capacity of short circuit index, i.e., the capacity of short circuit of DC converter station to be selected, the bigger direct current priority of capacity of short circuit is more
It is high；
(b) single-point interaction index, i.e., direct current to be selected and MIESCR (Multi Infeed in existing DC converter station
Effective Short Circuit Ratio, many effective short-circuit ratioes of feed-in) minimum website interaction factor MIIFm,
MIIFmSmaller website priority is higher；Wherein, MIESCR calculation formula is as follows：
In formula, i numbers for DC loop, MSCRiFor the effective short-circuit ratio of many feed-ins of numbering i DC loop, SaciTo compile
Equivalent dc power after number, PdiAnd PdjRespectively numbering is i and the nominal DC power of j DC loop, ZeqiiFor numbering
For the impedance matrix of i DC loop, ZeqijThe impedance matrix for being i between j DC loop for numbering.
(c) overall interaction index：The average value of i.e. each direct current to be selected and the interaction factor of the existing direct current of the whole network
MIIFa, MIIFaSmaller website priority is higher；
(d) comprehensive index for selection：Comprehensive capacity of short circuit index, single-point interaction index and overall interaction index,
Form direct current drop point and integrate index for selectionThe minimum point of M (i) values is as excellent
Select direct current drop point.Wherein, the computational methods of comprehensive index for selection M (i) are as follows：
In formula,
A, b, c are constant, and a+b+c=1.
S3, calculates receiving end AC system feed-in K and returns after direct current, many feed-ins of all direct currents of feed-in receiving end AC system
Effective short-circuit ratio, many effective short-circuit ratioes of feed-in are compared with presetting many effective short-circuit ratio threshold values of feed-in, receiving end is judged
Whether AC system can bear K and return direct current feed-in；If so, then entering next step；
Referring to Fig. 2, this step embodiment is as follows：
S31, calculates the effective short-circuit ratio of many feed-ins that J+K returns direct current, and J is the existing direct current of receiving end AC system before this planning
Number is returned, K plans that the direct current of feed-in receiving end AC system returns number, 1≤K≤N for this；
Before this planning, there is the direct current of feed-in in possible receiving end AC system.This step need to consider that this is advised
Before drawing influence of the whole direct currents of feed-in to receiving end AC system is needed in whole direct currents of feed-in and this planning.
S32, all J+K effective short-circuit ratioes of many feed-ins for returning direct current are compared with setting many effective short-circuit ratio threshold values of feed-in
Compared with, judge whether a direct current the effective short-circuit ratio of many feed-ins be less than given threshold；
S33, if so, by this plan in can feed-in direct current scale be defined as K-1 return direct current total capacities；
S34, if the effective short-circuit ratio of many feed-ins of all direct currents is all higher than given threshold, judges whether K is equal to N；
S35, if K ＜ N, the direct current for selecting K+1 feedbacks to enter repeats previous step；
S36, if K=N, receives whole N times direct current feed-ins, during this is planned can the direct current scale of feed-in be defined as N
Return direct current total capacity.
In this step, if the MIESCR for having a website is less than given threshold, illustrate that receiving end AC system is unsatisfactory for
K returns direct current feed-in requirement, therefore, and the capacity summation that K-1 returns direct current is that receiving-end system can feed-in direct current scale；If whole K
The MIESCR of individual website is all higher than given threshold, then illustrates that receiving end AC system meets K and returns direct current feed-in requirement, therefore, K is returned
The capacity summation of direct current is that receiving-end system can feed-in direct current scale；If K=N, the capacity summation that whole N returns direct current be by
End system can feed-in direct current scale.
In one embodiment, the given threshold can be 1.6.
S4, the stability that K returns power network after direct current feed-in is checked according to judged result, if meeting grid stability condition,
Then receive K and return direct current feed-in.
Grid stability can resist the ability of catastrophe failure by power network to evaluate.In one embodiment, school can be passed through
Core K returns after direct current feed-in in the whole network receiving end AC system N-1, N-2, three-phase shortcircuit switch failure failure stability to check electricity
Net stability, wherein, receiving end AC system N-1, N-2 have an equipment fault out of service in expression system respectively and system in
There are two equipment simultaneous faults out of service.
S5, by all direct current total capacities for meeting grid stability condition be set to can feed-in receiving end AC system direct current advise
Mould.
Below in conjunction with the accompanying drawings to the present invention detection receiving end AC system feed-in direct current transportation scale system embodiment
It is illustrated.
As shown in figure 3, the system of the detection receiving end AC system feed-in direct current transportation scale of the present invention includes：
Determining device 110, for the balance of electric power and ener result based on each subregion of power network, determines power network receiving end AC system
Need the direct current of feed-in to return number N, select the direct current drop point of every time direct current；N is positive integer；
The balance of electric power and ener result, i.e., the difference being available between electric power and electricity and power load and electricity of each subregion
Value.
Based on the balance of electric power and ener result of each subregion of power network, determine that power network receiving end AC system needs the direct current of feed-in always to hold
Amount, single time D.C. capacity, and direct current time number N is obtained according to direct current total capacity, single time D.C. capacity.
The direct current drop point can dissolve principle nearby to select according to electric power, and now direct current drop point pays the utmost attention to electric power vacancy
Larger region.Or, can consider system by electric energy power, whether occur congestion phenomenon, voltage stability, overvoltage etc. come
Select direct current drop point.In addition, also needing to take into account the economy of system operation during selection direct current drop point.
Selection device 120, the interaction index for calculating each direct current, and according to the interaction index of each direct current according to
It is secondary from N return direct current in selection receiving end AC system can the K of feed-in return direct currents；1≤K≤N；
The selection device 120 returns to N by calculating direct current interaction index and it is expected that the direct current of feed-ins carries out priority
Sequence, so that being prevented effectively from influences the larger too early feed-in of direct current on the stabilization of power grids, hinders follow-up direct current feed-in, reduction power network can
Feed-in direct current scale.Direct current interaction index may include：
(a) capacity of short circuit index, i.e., the capacity of short circuit of DC converter station to be selected, the bigger website priority of capacity of short circuit is more
It is high；
(b) single-point interaction index, i.e., direct current to be selected and MIESCR (Multi Infeed in existing DC converter station
Effective Short Circuit Ratio, many effective short-circuit ratioes of feed-in) minimum website interaction factor MIIFm,
MIIFmSmaller website priority is higher；Wherein, MIESCR calculation formula is as follows：
In formula, i numbers for DC loop, MSCRiFor the effective short-circuit ratio of many feed-ins of numbering i DC loop, SaciTo compile
Equivalent dc power after number, PdiAnd PdjRespectively numbering is i and the nominal DC power of j DC loop, ZeqiiFor numbering
For the impedance matrix of i DC loop, ZeqijThe impedance matrix for being i between j DC loop for numbering.
(c) overall interaction index：The average value of i.e. each direct current to be selected and the interaction factor of the existing direct current of the whole network
MIIFa, MIIFaSmaller website priority is higher；
(d) comprehensive index for selection：Comprehensive capacity of short circuit index, single-point interaction index and overall interaction index,
Form direct current drop point and integrate index for selectionThe minimum point of M (i) values is as excellent
Select direct current drop point.Wherein：
A, b, c are constant, and a+b+c=1.
Judgment means 130, are returned after direct current, the institute of feed-in receiving end AC system for calculating receiving end AC system feed-in K
There is the effective short-circuit ratio of many feed-ins of direct current, many effective short-circuit ratioes of feed-in are carried out with default many effective short-circuit ratio threshold values of feed-in
Compare, judge whether receiving end AC system can bear K and return direct current feed-in；If so, then performing the function of capacity checking device；
Referring to Fig. 4, the judgment means 130 include：
Computing unit 1301, the effective short-circuit ratio of many feed-ins of direct current is returned for calculating J+K, and J hands over for receiving end before this planning
The existing direct current of streaming system returns number, and K plans that the direct current of feed-in receiving end AC system returns number, 1≤K≤N for this；
Comparing unit 1302, it is effectively short with setting many feed-ins for all J+K to be returned to the effective short-circuit ratio of many feed-ins of direct current
Road is compared than threshold value, judges whether that the effective short-circuit ratio of many feed-ins of a direct current is less than given threshold, if so, then not
Receive K return direct current feed-in, during this is planned can feed-in direct current scale be defined as K-1 return direct current total capacities；If all straight
The effective short-circuit ratio of many feed-ins of stream is all higher than given threshold, then judges whether K is equal to N；
If K ＜ N, the direct current for selecting K+1 feedbacks to enter, and perform the function of computing unit；
If K=N, receive whole N and return direct current feed-in, during this is planned can the direct current scale of feed-in be defined as N and return directly
Flow total capacity.
In one embodiment, the given threshold can be 1.6.
Capacity checking device 140, for checking the stability that K returns power network after direct current feed-in according to judged result, if meeting electricity
Net stability condition, then receive K and return direct current feed-in.
Grid stability can resist the ability of catastrophe failure by power network to evaluate.In one embodiment, capacity checking device
140 can be steady by switch failure failure in the whole network receiving end AC system N-1, N-2, three-phase shortcircuit after K times direct current feed-ins of check
It is qualitative to check grid stability, wherein, receiving end AC system N-1, N-2 has the equipment fault to exit in expression system respectively
There are two equipment simultaneous faults out of service in operation and system.
Setting device 150, for be set to all direct currents for meeting grid stability condition can feed-in receiving end AC system
Direct current scale.
The present invention detection can feed-in receiving end AC system direct current scale system with the present invention detection can feed-in by
Hold AC system direct current scale method correspond, above-mentioned detection can feed-in receiving end AC system direct current scale side
The technical characteristic and its advantage that the embodiment of method is illustrated be applied to detection can feed-in receiving end AC system direct current scale
System embodiment in, hereby give notice that.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that coming for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of detection can feed-in receiving end AC system direct current scale method, it is characterised in that comprise the following steps：
Based on the balance of electric power and ener result of each subregion of power network, determine that power network receiving end AC system needs the direct current of feed-in to return number N, choosing
The direct current drop point of fixed every time direct current；N is positive integer；
Calculate the interaction index of each direct current, and according to the interaction index of each direct current successively from N return direct current in select by
Hold AC system can feed-in K return direct currents；1≤K≤N；
Calculate receiving end AC system feed-in K to return after direct current, many feed-ins of all direct currents of feed-in receiving end AC system are effectively short
Road ratio, many effective short-circuit ratioes of feed-in are compared with presetting many effective short-circuit ratio threshold values of feed-in, judge receiving end exchange system
Whether system can bear K and return direct current feed-in；If so, then entering next step；
The stability that K returns power network after direct current feed-in is checked according to judged result, if meeting grid stability condition, receives the
K returns direct current feed-in；
By all direct currents for meeting grid stability condition be set to can feed-in receiving end AC system direct current scale.
2. detection according to claim 1 can feed-in receiving end AC system direct current scale method, it is characterised in that it is each
The interaction index of direct current includes：The capacity of short circuit of DC converter station to be selected, direct current to be selected are fed with more with existing direct current
Imitate the minimum direct current interaction factor MIIF of short-circuit ratiom, each direct current and the whole network to be selected existing direct current interaction factor
Average value MIIFaAnd/or comprehensive index for selection M (i).
3. detection according to claim 2 can feed-in receiving end AC system direct current scale method, it is characterised in that also
Including：
Comprehensive index for selection M (i) is calculated according to equation below：
In formula,
A, b, c are constant, and a+b+c=1；
In formula, MIIFmFor the direct current interaction factor that direct current to be selected is minimum with many effective short-circuit ratioes of feed-in in existing direct current；
MIIFaFor each direct current to be selected and the average value of the interaction factor of the existing direct current of the whole network, K represents receiving end AC system feed-in
K returns direct current, and i represents that DC loop is numbered, SacRepresent equivalent dc power.
4. detection according to claim 1 can feed-in receiving end AC system direct current scale method, it is characterised in that institute
State calculating receiving end AC system feed-in K to return after direct current, many feed-ins of all direct currents of feed-in receiving end AC system are effectively short-circuit
Than many effective short-circuit ratioes of feed-in are compared with presetting many effective short-circuit ratio threshold values of feed-in, receiving end AC system is judged
The step of whether the direct current feed-in being born includes：
The effective short-circuit ratio of many feed-ins that J+K returns direct current is calculated, J returns number, K for the existing direct current of receiving end AC system before this planning
Plan that the direct current of feed-in receiving end AC system returns number, 1≤K≤N for this；
All J+K effective short-circuit ratioes of many feed-ins for returning direct current are compared with setting many effective short-circuit ratio threshold values of feed-in, judged
The effective short-circuit ratio of many feed-ins with the presence or absence of a direct current is less than given threshold, if so, not receiving K then returns direct current feed-in, will
This planning in can feed-in direct current scale be defined as K-1 return direct current total capacities；If the effective short-circuit ratio of many feed-ins of all direct currents
Given threshold is all higher than, then judges whether K is equal to N；
If K ＜ N, the direct current for selecting K+1 feedbacks to enter repeats previous step；
If K=N, receive whole N and return direct current feed-in, during this is planned can the direct current scale of feed-in to be defined as N times direct currents total
Capacity.
5. detection according to claim 1 can feed-in receiving end AC system direct current scale method, it is characterised in that institute
It is 1.6 to state the effective short-circuit ratio threshold value of default many feed-ins.
6. detection according to claim 1 can feed-in receiving end AC system direct current scale method, it is characterised in that institute
Stating the step of checking the stability of power network after K times direct current feed-ins according to judged result includes：K is checked to return after direct current feed-in entirely
Switch failure failure stability in net receiving end AC system N-1, receiving end AC system N-2, three-phase shortcircuit.
7. a kind of detection can feed-in receiving end AC system direct current scale system, it is characterised in that including：
Determining device, for the balance of electric power and ener result based on each subregion of power network, determines that power network receiving end AC system needs feed-in
Direct current return number N, select every time direct current direct current drop point；N is positive integer；
Selection device, the interaction index for calculating each direct current, and returned successively from N according to the interaction index of each direct current
Selected in direct current receiving end AC system can the K of feed-in return direct currents；1≤K≤N；
Judgment means, are returned after direct current for calculating receiving end AC system feed-in K, all direct currents of feed-in receiving end AC system
Many effective short-circuit ratioes of feed-in, many effective short-circuit ratioes of feed-in are compared with presetting many effective short-circuit ratio threshold values of feed-in, sentenced
Whether disconnected receiving end AC system can bear K and return direct current feed-in；If so, then performing the function of capacity checking device；
Capacity checking device, for checking the stability that K returns power network after direct current feed-in according to judged result, if meeting grid stability
Condition, then receive K and return direct current feed-in；
Setting device, for by all direct currents for meeting grid stability condition be set to can feed-in receiving end AC system direct current advise
Mould.
8. detection according to claim 7 can feed-in receiving end AC system direct current scale system, it is characterised in that institute
Stating judgment means includes：
Computing unit, the effective short-circuit ratio of many feed-ins of direct current is returned for calculating J+K, and J has planned preceding receiving end AC system for this
There is direct current to return number, K plans that the direct current of feed-in receiving end AC system returns number, 1≤K≤N for this；
Comparing unit, for all J+K to be returned to the effective short-circuit ratio of many feed-ins of direct current with setting many effective short-circuit ratio threshold values of feed-in
It is compared, judges whether that the effective short-circuit ratio of many feed-ins of a direct current is less than given threshold, if so, not receiving K then
Return direct current feed-in, during this is planned can feed-in direct current scale be defined as K-1 return direct current total capacities；If many feedbacks of all direct currents
Enter effective short-circuit ratio and be all higher than given threshold, then judge whether K is equal to N；
If K ＜ N, the direct current for selecting K+1 feedbacks to enter, and perform the function of computing unit；
If K=N, receive whole N and return direct current feed-in, during this is planned can the direct current scale of feed-in to be defined as N times direct currents total
Capacity.
9. detection according to claim 7 can feed-in receiving end AC system direct current scale system, it is characterised in that institute
It is 1.6 to state the effective short-circuit ratio threshold value of default many feed-ins.
10. detection according to claim 7 can feed-in receiving end AC system direct current scale system, it is characterised in that
The capacity checking device includes：
Unit is checked, is refused for checking to switch in the whole network receiving end AC system N-1, N-2, three-phase shortcircuit after K times direct current feed-ins
Dynamic failure stability.
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| CN108173295B (en) * | 2016-12-07 | 2021-05-25 | 国家电网公司 | Selection method for determining multi-feed-in direct current drop point |
| CN106786557B (en) * | 2017-01-23 | 2023-08-18 | 中国电力科学研究院 | Extra-high voltage layered direct current capacity and drop point selection method and system |
| CN109103916B (en) * | 2018-09-20 | 2019-12-10 | 清华大学 | method for evaluating voltage supporting capability of receiving-end power grid of multi-direct-current feed-in system |
| CN112417629B (en) * | 2020-11-23 | 2023-02-17 | 中国能源建设集团浙江省电力设计院有限公司 | 1000/500kV layered partition planning method for multi-DC feed-in block receiving-end power grid |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101567558A (en) * | 2009-02-27 | 2009-10-28 | 中国南方电网有限责任公司电网技术研究中心 | Model and method for evaluating voltage stability of converter busbars of DC transmission systems |
| CN102723726A (en) * | 2012-06-01 | 2012-10-10 | 中国电力科学研究院 | Method for determining maximal direct current receiving quantity in alternating current receiving system |
| CN101969206B (en) * | 2010-09-03 | 2013-08-28 | 中国电力科学研究院 | Evaluation method for judging influence of grid structure on alternating current/direct current (AC/DC) system |
| CN103986151A (en) * | 2014-03-20 | 2014-08-13 | 国家电网公司 | Alternating-current receiving end grid direct-current receiving scale calculation method |
| CN104319760A (en) * | 2014-06-30 | 2015-01-28 | 南方电网科学研究院有限责任公司 | Assessment method and system for voltage supporting capability of multi-DC-feed AC power grid |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9188109B2 (en) * | 2012-02-16 | 2015-11-17 | Spyros James Lazaris | Virtualization, optimization and adaptation of dynamic demand response in a renewable energy-based electricity grid infrastructure |
-
2015
- 2015-09-06 CN CN201510564174.5A patent/CN105207244B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101567558A (en) * | 2009-02-27 | 2009-10-28 | 中国南方电网有限责任公司电网技术研究中心 | Model and method for evaluating voltage stability of converter busbars of DC transmission systems |
| CN101969206B (en) * | 2010-09-03 | 2013-08-28 | 中国电力科学研究院 | Evaluation method for judging influence of grid structure on alternating current/direct current (AC/DC) system |
| CN102723726A (en) * | 2012-06-01 | 2012-10-10 | 中国电力科学研究院 | Method for determining maximal direct current receiving quantity in alternating current receiving system |
| CN103986151A (en) * | 2014-03-20 | 2014-08-13 | 国家电网公司 | Alternating-current receiving end grid direct-current receiving scale calculation method |
| CN104319760A (en) * | 2014-06-30 | 2015-01-28 | 南方电网科学研究院有限责任公司 | Assessment method and system for voltage supporting capability of multi-DC-feed AC power grid |
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