CN107565594A - Power ascension amount distribution method between more direct currents that consideration receiving end voltage deviation influences - Google Patents
Power ascension amount distribution method between more direct currents that consideration receiving end voltage deviation influences 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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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Abstract
The invention discloses power ascension amount distribution method between a kind of more direct currents for considering receiving end voltage deviation and influenceing.Wherein, this method includes direct current real-time Transmission power, inverter side change of current busbar voltage, DC solutions blocking and trip protection signal are acquired and measured; after locking failure occurs for power network and meets default locking criterion; by the influence for considering AC network power, power flow transfer; the distribution of active power lifting capacity calculates between having carried out more direct currents that consideration receiving end voltage deviation influences; then carry out power ascension instruction and assigning for machine instruction is cut in steady control, strengthen sending end and receiving-end system frequency, the purpose of voltage stability after reaching direct current locking.The present invention solve the problems, such as after high-capacity direct current locking caused sending overfrequency and avoid power distribution it is unreasonable caused by receiving-end system brownout risk.
Description
Technical field
The invention belongs to the technical field of power system security stability contorting, and in particular to one kind considers receiving end voltage deviation
Power ascension amount distribution method between the more direct currents influenceed.
Background technology
More direct currents are sent out power network and run in a manner of isolated island, and Net Frame of Electric Network is very weak.When monopole or bipolar occurs for direct current
After locking, sending end power network will appear from excessive power, frequency stabilization outstanding problem.FREQUENCY CONTROL means main at present are organic
The primary frequency modulation of group, steady control cut machine, FLC, dc power lifting/return drop etc..Direct current needs in the case of emergency DC power support is carried out
Play direct current capability of overload.Need to dive caused by caused receiving-end system power flow transfer after considering dc power lifting simultaneously
In brownout risk.
By taking the sending end Yunnan Power System of south electric network as an example, untill 2016, Yunnan Power System have 6 times DC transmission systems with
South electric network major network realizes Asynchronous Interconnection.Wherein ox falls from direct current Chu Sui direct currents and general emigrant's big high pressure/extra-high voltage direct-current of direct current three
Enter Guangdong Power Grid.Concentrated because Guangdong Power Grid receiving end current conversion station has drop point, couple the characteristics of close, ac and dc systemses it is mutual
Effect and more DC converter stations intercouple generates significant impact to receiving-end system system safety and stability.If certain direct current occurs
During Large Copacity locking, sending will appear from a large amount of power surplus, trigger sending overfrequency problem.It is urgent using dc power
Enhanced feature, it can effectively alleviate sending end overfrequency problem.But if power ascension amount unreasonable distribution between different direct currents, receiving end system
Trend occurs in system to be shifted on a large scale, it is possible to triggers the too low problem of voltage level in receiving end heavy load area.If therefore after failure
Energy reasonable distribution controlled quentity controlled variable, i.e., reduce receiving-end system power flow transfer amount on the basis of system safe and stable operation is ensured, it will
Positive role is played to the safety and stability of power network.
For the system frequency and voltage problem after high-capacity direct current locking present in current power network, straight-flow system is utilized
Rapidity and controllability, the present invention proposes a kind of effective solution.
The content of the invention
The invention provides power ascension amount distribution method between a kind of more direct currents for considering receiving end voltage deviation and influenceing, so that
Solve the problems, such as that the sending overfrequency after Large Copacity locking occurs for certain direct current less, while avoid due to dc power sendout not
Suitable and existing receiving end voltage level crosses low-risk.
In order to solve the above technical problems, the present invention uses following technical scheme：
Power ascension amount distribution method between a kind of more direct currents for considering receiving end voltage deviation and influenceing, this method include：To straight
Streaming power, inverter side change of current busbar voltage, DC solutions blocking and trip protection signal are acquired and measured, in electricity
After net occurs locking failure and meets default locking criterion, according to direct current locking capacity, sending end power surplus amount P is determinedtotal
And each direct current peak power lifting capacity sum ∑ Pmax；Then carry out considering the active power lifting that receiving end voltage deviation influences
Amount distribution calculates, and then realizes that assigning for machine instruction is cut in power ascension instruction and steady control.
Power ascension amount distribution method between a kind of more direct currents for considering receiving end voltage deviation and influenceing, it is characterised in that described
Power ascension amount distribution method comprises the following steps：
Step 1, direct current transmission power, inverter side change of current busbar voltage, the DC solutions of each DC line are obtained online
Blocking and trip protection signal, monitoring in real time and online differentiation are carried out to direct current blocking；
Step 2, according to direct current locking criterion, direct current latch status is judged, if having one and above DC line closes
It is locked into step 3, otherwise return to step 1；
Step 3, sending end power surplus amount P is determinedtotal, its value is one or more DC line locking capacity；
Step 4, other each direct current peak power lifting capacity sum ∑ P beyond locking DC line are determinedmax, i.e., it is all
Support the maximum transmission power of direct current and the summation of current transmission power difference；
Step 5, judge whether other each DC line inverter side voltages in addition to locking DC line are less than minimum
Value, if detecting, inverter side voltage is less than minimum limit value, and this DC line should exit support, return to step 3, recalculate ∑
Pmax；Otherwise step 6 is entered；
Step 6, the dc power lifting capacity distribution factor η for considering that receiving end voltage deviation influences is calculatedj,i；
Step 7, if Ptotal＞ ∑s Pmax, cut machine principle according to minimum and carry out steady control and cut machine, then, according to cutting machine amount and superfluous
Surplus return to step 3；Otherwise step 8 is entered；
Step 8, if Ptotal≤∑PmaxIf all support direct current actual power lifting capacity summations are Psupport, its value is equal to
Ptotal, then i-th support dc power lifting capacity be：
In formula, i, which is represented, supports DC line, j representing fault locking DC lines, PmaxDC line is supported for i-th
Maximum transmission power and current transmission power difference, ηj,iThe dc power lifting capacity influenceed to consider receiving end voltage deviation is distributed
The factor；
Step 9, assign and perform power ascension instruction and surely control and cut machine instruction, terminate.
The present invention further comprises following preferred scheme：
In step 2, DC line locking includes monopole locking and bipolar locking.
In step 3, if monopole locking, P occur for direct currenttotalFor monopole locking capacity；If bipolar locking occurs for direct current,
Then PtotalFor bipolar locking capacity.
In steps of 5, the preferred 0.8p.u. of the minimum limit value of voltage, wherein p.u. are DC line inverter side voltage indexes one
Value.
In step 6, dc power lifting capacity distribution factor is calculated according to the following formula：
ηj,i=EMIOESCR,i×Kj,i, E in formulaMIOESCR,iFor more feed-in effective operation short-circuit ratioes, Kj.iFor power flow transfer system
Number.
In step 7, first, according to minimum cutting principle, machine amount and ∑ P are cutmaxSum is larger than Ptotal；Secondly, root
According to owing to cut principle, sending should possess certain power redundancy amount；Then, correction sending end work(is returned according to cutting machine amount and amount of redundancy
Rate profit margin Ptotal, its value is equal to the sending end power surplus amount P before correctiontotalSubtract cut machine amount possess with sending it is superfluous
Difference after the sum of surplus；The scope of wherein described certain power redundancy amount is 100MW~500MW.
The present invention has technique effect beneficial below：By to direct current real-time Transmission power, inverter side change of current bus electricity
Pressure, DC solutions blocking and trip protection signal are acquired and measured, after direct current locking is judged, consider by
Power ascension amount distribution calculates between more direct currents of terminal voltage deviation effects, then carries out power ascension instruction and cuts under machine instruction
Reach, realize the emergency DC power support after direct current locking failure, solve caused sending end system after current high-capacity direct current locking
System high frequency problem and avoid power distribution it is unreasonable caused by receiving-end system voltage level deviation cross Risks.
Brief description of the drawings
Fig. 1 is that power ascension amount distribution method flow is illustrated between the present invention considers more direct currents that receiving end voltage deviation influences
Figure；
Fig. 2 is the simplied system structure figure of certain asynchronous interconnected network.
Embodiment
In order that those skilled in the art is better understood from the present invention program, below in conjunction with the embodiment of the present invention
Accompanying drawing, the plans in the embodiment of the present invention are carried out clear, complete to description, it is clear that described embodiment is only
The centralized Control embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
All other embodiment that member is obtained on the premise of creative work is not made, it should all belong to the model that the present invention protects
Enclose.
Embodiment 1
According to embodiments of the present invention, there is provided power ascension amount point between a kind of more direct currents for considering receiving end voltage deviation and influenceing
Method of completing the square embodiment.
Fig. 1 be according to embodiments of the present invention 1 consideration receiving end voltage deviation influence more direct currents between power ascension amount distribute
Method flow diagram, as shown in figure 1, this method specifically comprises the following steps：
Step 1, direct current transmission power, inverter side change of current busbar voltage, the DC solutions of each DC line are obtained online
Blocking and trip protection signal, monitoring in real time and online differentiation are carried out to direct current blocking；
Step 2, according to direct current locking criterion, direct current latch status is judged, if having one and above DC line closes
It is locked into step 3, otherwise return to step 1；
Wherein, DC line locking includes monopole locking and bipolar locking.
Step 3, sending end power surplus amount P is determinedtotal, its implication is one or more DC line locking capacity；
If monopole locking, P occur for direct currenttotalFor monopole locking capacity；If bipolar locking, P occur for direct currenttotalFor
Bipolar locking capacity.
Step 4, other each direct current peak power lifting capacity sum ∑ P beyond locking DC line are determinedmax, its implication
For the maximum transmission power and the summation of current transmission power difference of all support direct currents；
Step 5, judge whether other each DC line inverter side voltages in addition to locking DC line are less than minimum
Value, if detecting, inverter side voltage is less than minimum limit value, and this DC line should exit support, return to step 3, recalculate ∑
Pmax；Otherwise step 6 is entered；The minimum limit value of voltage preferred 0.8p.u., wherein p.u. refer to perunit value.
Step 6, the dc power lifting capacity distribution factor η for considering that receiving end voltage deviation influences is calculatedj,i；
Dc power lifting capacity distribution factor is calculated according to the following formula：
6.1 calculate more feed-in effective operation short-circuit ratio EMIOESCR,i, it is defined as：
In formula, Saco,iThe three-phase shortcircuit capacity under the method for operation is corresponded to for system at Inverter Station i current conversion station buses；Qco,iFor
The actual reactive power that Inverter Station alternating current filter and shunt capacitor provide；Pdc,i、Pdc,jFor DC line i, j actual fortune
Row capacity；For more feed-in interaction factors.
6.2 calculate power flow transfer COEFFICIENT Kj,i, it is defined as follows：
In formula, Zeq_j.iFor the equiva lent impedance between failure direct current j and support direct current i Inverter Station.
6.3 calculate dc power lifting capacity distribution factor ηj,i, it is defined as follows：
ηj,i=EMIOESCR,i×Kj,i
In formula, ηj,iRepresent to support straight-flow system i to failure straight-flow system j support effect, ηj,iIt is bigger, then straight-flow system
Support effects of the i to straight-flow system j is better.If straight-flow system j failures, calculate each bar and support dc power of the direct current to direct current j
Distribution factor, then according to the scale shared by each direct current distribution factor carry out the power ascension amount supporting direct current
Distribution.
Step 7, if Ptotal＞ ∑s Pmax, cut machine principle according to minimum and carry out steady control and cut machine, then, according to cutting machine amount and superfluous
Surplus return to step 3；Otherwise step 8 is entered；First, according to minimum cutting principle, machine amount and ∑ P are cutmaxSum is larger thanSecondly, according to owing to cut principle, sending should possess certain power redundancy amount (100MW~500MW)；Then, according to cutting
Machine amount and amount of redundancy return to correction sending end power surplus amount Ptotal, its value is equal to the sending end power surplus amount P before correctiontotalSubtract
Go to cut the difference after the sum for the amount of redundancy that machine amount is possessed with sending end.
Step 8, if Ptotal≤∑PmaxIf all support direct current actual power lifting capacity summations are Psupport, its value is equal to
Ptotal, then i-th support dc power lifting capacity be：
In formula, i, which is represented, supports direct current, j representing fault direct currents, PmaxBe i-th support direct current maximum transmission power with work as
Preceding transmission power difference, ηj,iTo consider the dc power lifting capacity distribution factor of receiving end voltage deviation influence；
Step 9, assign and perform power ascension instruction and surely control and cut machine instruction, terminate.
Illustrate the above method according to the present embodiment with reference to Fig. 2.
So that Fig. 2 shows three direct current islet operation power networks as an example, DC line 1 is ± 500kV bipolar customary DC, specified
Active power is 2 × 1000MW=2000MW；DC line 2 and 3 is the bipolar customary DC for ± 800kV, specified active
Power is 2 × 1000MW=2000MW；Three DC rectifier sides use Given current controller, and inverter side is controlled using voltage is determined,
It is equipped with dc power limiter, frequency dead band 0.1Hz.1 supporting hydroelectric power plant G1 of sending end power network DC line shares 4 machines, dress
Machine capacity is 4 × 600=2400MW；The supporting hydroelectric power plant G2 of DC line 2 shares 5 machines, and installed capacity is 5 × 600=
The supporting hydroelectric power plant G3 of 3000MW DC lines 3 shares 4 units, and installed capacity is 4 × 700=2800MW.Receiving end power plant G4-G6
It is 12 units, installed capacity is 12 × 600=7200MW, and speed regulator frequency dead band is set to 0.05Hz.Receiving end power network
Burden with power capacity is 2000MW.
After in 5s bipolar locking failure occurs for DC line 1.Step 2 detects that direct current locking occurs, into step 3；
According to step 3, dc power profit margin, i.e. locking capacity 2000MW are determined；According to step 4, calculating direct current maximum support amount is
1000MW；According to step 5, direct current 2,3 inverter side voltages are all higher than limit value, into step 6；According to step 6, direct current 2,3 is calculated
Power allocation factor be respectively 0.67 and 0.33；According to step 7, judge that direct current maximum support amount is less than power surplus amount,
According to minimum cutting principle, two units (1200MW) of excision G1 power plant, according to owing to cut principle, sending end possesses certain power redundancy
Measure (100MW), while return to step 3, it is determined that new power surplus amount 700MW；According to step 7, direct current maximum support amount is judged
It is greater than power surplus amount, into step 8；According to step 8, dc power lifting capacity is determined：The power ascension of DC line 2
469MW, apart from the power ascension 231MW of DC line 3；According to step 9, assign power ascension instruction and cut machine instruction, knot with steady control
Beam.
Applicant is described in detail and described to embodiments of the invention with reference to Figure of description, but this area skill
Art personnel are it should be understood that above example is only the preferred embodiments of the invention, and explanation is intended merely to help reader in detail
More fully understand that the present invention is spiritual, and not limiting the scope of the invention, on the contrary, any invention essence based on the present invention
Any improvement or modification that god is made should all be fallen within the scope and spirit of the invention.
Claims (7)
1. power ascension amount distribution method between a kind of more direct currents for considering receiving end voltage deviation and influenceing, this method include：To direct current
Transimission power, inverter side change of current busbar voltage, DC solutions blocking and trip protection signal are acquired and measured, in power network
Generation locking failure and after meeting default locking criterion, according to direct current locking capacity, determines sending end power surplus amount PtotalAnd
Each direct current peak power lifting capacity sum ∑ Pmax；Then carry out considering the active power lifting capacity that receiving end voltage deviation influences
Distribution calculates, and then realizes that assigning for machine instruction is cut in power ascension instruction and steady control.
A kind of 2. power ascension amount distribution method between more direct currents for considering receiving end voltage deviation and influenceing, it is characterised in that the work(
Rate lifting capacity distribution method comprises the following steps：
Step 1, direct current transmission power, inverter side change of current busbar voltage, the direct current for obtaining each DC line online unblock
State and trip protection signal, monitoring in real time and online differentiation are carried out to direct current blocking；
Step 2, according to direct current locking criterion, judge direct current latch status, enter if having one and above DC line that locking occurs
Enter step 3, otherwise return to step 1；
Step 3, sending end power surplus amount P is determinedtotal, its value is one or more DC line locking capacity；
Step 4, other each direct current peak power lifting capacity sum ∑ P beyond locking DC line are determinedmax, i.e., all supports
The maximum transmission power of direct current and the summation of current transmission power difference；
Step 5, judge whether other each DC line inverter side voltages in addition to locking DC line are less than minimum limit value, if
Detect that inverter side voltage is less than minimum limit value, then this DC line should exit support, return to step 3, recalculate ∑ Pmax；
Otherwise step 6 is entered；
Step 6, the dc power lifting capacity distribution factor η for considering that receiving end voltage deviation influences is calculatedj,i；
Step 7, if Ptotal＞ ∑s Pmax, cut machine principle according to minimum and carry out steady control and cut machine, then, according to cutting machine amount and amount of redundancy
Return to step 3；Otherwise step 8 is entered；
Step 8, if Ptotal≤∑PmaxIf all support direct current actual power lifting capacity summations are Psupport, its value is equal to
Ptotal, then i-th support dc power lifting capacity be：
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In formula, i, which is represented, supports DC line, j representing fault locking DC lines, PmaxFor the maximum of i-th support DC line
Transimission power and current transmission power difference, ηj,iTo consider the dc power lifting capacity distribution factor of receiving end voltage deviation influence；
Step 9, assign and perform power ascension instruction and surely control and cut machine instruction, terminate.
3. power ascension amount distribution method between the more direct currents according to claim 2 for considering receiving end voltage deviation and influenceing, its
It is characterised by：
In step 2, DC line locking includes monopole locking and bipolar locking.
4. power ascension amount distribution method between the more direct currents according to claim 3 for considering receiving end voltage deviation and influenceing, its
It is characterised by：
In step 3, if monopole locking, P occur for direct currenttotalFor monopole locking capacity；If bipolar locking occurs for direct current,
PtotalFor bipolar locking capacity.
5. power ascension amount distribution method between the more direct currents according to claim 2 for considering receiving end voltage deviation and influenceing, its
It is characterised by：
In steps of 5, the preferred 0.8p.u. of the minimum limit value of voltage, wherein p.u. are the values of DC line inverter side voltage indexes one.
6. power ascension amount distribution method between the more direct currents according to claim 2 for considering receiving end voltage deviation and influenceing, its
It is characterised by：
In step 6, dc power lifting capacity distribution factor is calculated according to the following formula：
ηj,i=EMIOESCR,i×Kj,i, E in formulaMIOESCR,iFor more feed-in effective operation short-circuit ratioes, Kj.iFor power flow transfer coefficient.
7. power ascension amount distribution method between the more direct currents according to claim 2 for considering receiving end voltage deviation and influenceing, its
It is characterised by：
In step 7, first, according to minimum cutting principle, machine amount and ∑ P are cutmaxSum is larger than Ptotal；Secondly, according to deficient
Principle is cut, sending should possess certain power redundancy amount；Then, it is full of according to cutting machine amount and amount of redundancy and return to correction sending end power
Surplus Ptotal, its value is equal to the sending end power surplus amount P before correctiontotalSubtract and cut the amount of redundancy that machine amount is possessed with sending
Sum after difference；The scope of wherein described certain power redundancy amount is 100MW~500MW.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107994561A (en) * | 2018-01-10 | 2018-05-04 | 云南电网有限责任公司电力科学研究院 | It is a kind of based on the locking of direct current monopole surely control cut machine cut machine amount optimization method and device |
| CN108923412A (en) * | 2018-08-27 | 2018-11-30 | 云南电网有限责任公司电力科学研究院 | The frequency stabilization control method and device of mostly DC asynchronous sending end power grid |
| CN109103919A (en) * | 2018-10-12 | 2018-12-28 | 深圳供电局有限公司 | The capacity estimation method of flexible HVDC transmission system in a kind of urban distribution network |
| CN111082439A (en) * | 2020-01-07 | 2020-04-28 | 南方电网科学研究院有限责任公司 | Power grid coordination stability control method, system and equipment |
| CN111355255A (en) * | 2020-02-20 | 2020-06-30 | 山东大学 | Virtual modulation-based DC overvoltage suppression method and system after lockout fault |
| CN113904318A (en) * | 2020-07-06 | 2022-01-07 | 南京南瑞继保电气有限公司 | Calculation and generator tripping distribution method for power surplus margin of direct-current power grid in emergency |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103219739A (en) * | 2013-04-26 | 2013-07-24 | 华北电力大学 | Emergent power supporting control method |
| CN103683267A (en) * | 2013-10-29 | 2014-03-26 | 南京南瑞集团公司 | Power support capacity distribution method of different DC lines in multi-DC system |
| CN103762585A (en) * | 2014-01-15 | 2014-04-30 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Multi-direct-current distribution method of long-term overload capacity of high-voltage direct current transmission |
| CN104505866A (en) * | 2014-12-31 | 2015-04-08 | 华南理工大学 | Multi-infeed direct current failure recovery characteristic simulation equivalent uncoupling method |
| CN105048488A (en) * | 2015-09-01 | 2015-11-11 | 华中科技大学 | Flexible DC network DC short-circuit fault ride through method |
| CN105896585A (en) * | 2016-04-28 | 2016-08-24 | 南方电网科学研究院有限责任公司 | AC side fault ride-through control method for hybrid multi-terminal DC transmission system |
| CN106532745A (en) * | 2016-12-15 | 2017-03-22 | 中国南方电网有限责任公司电网技术研究中心 | Frequency coordination control method specific to send-out islands of multiple direct current circuits |
-
2017
- 2017-10-17 CN CN201710966996.5A patent/CN107565594B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103219739A (en) * | 2013-04-26 | 2013-07-24 | 华北电力大学 | Emergent power supporting control method |
| CN103683267A (en) * | 2013-10-29 | 2014-03-26 | 南京南瑞集团公司 | Power support capacity distribution method of different DC lines in multi-DC system |
| CN103762585A (en) * | 2014-01-15 | 2014-04-30 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Multi-direct-current distribution method of long-term overload capacity of high-voltage direct current transmission |
| CN104505866A (en) * | 2014-12-31 | 2015-04-08 | 华南理工大学 | Multi-infeed direct current failure recovery characteristic simulation equivalent uncoupling method |
| CN105048488A (en) * | 2015-09-01 | 2015-11-11 | 华中科技大学 | Flexible DC network DC short-circuit fault ride through method |
| CN105896585A (en) * | 2016-04-28 | 2016-08-24 | 南方电网科学研究院有限责任公司 | AC side fault ride-through control method for hybrid multi-terminal DC transmission system |
| CN106532745A (en) * | 2016-12-15 | 2017-03-22 | 中国南方电网有限责任公司电网技术研究中心 | Frequency coordination control method specific to send-out islands of multiple direct current circuits |
Non-Patent Citations (2)
| Title |
|---|
| 刘崇茹 等: ""幅值自适应的阶梯式紧急功率支援控制技术"", 《电力系统自动化》 * |
| 林桥 等: "基于直流综合支援因子的多直流紧急功率支援策略研究", 《华东电力》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107994561A (en) * | 2018-01-10 | 2018-05-04 | 云南电网有限责任公司电力科学研究院 | It is a kind of based on the locking of direct current monopole surely control cut machine cut machine amount optimization method and device |
| CN108923412A (en) * | 2018-08-27 | 2018-11-30 | 云南电网有限责任公司电力科学研究院 | The frequency stabilization control method and device of mostly DC asynchronous sending end power grid |
| CN108923412B (en) * | 2018-08-27 | 2022-05-20 | 云南电网有限责任公司电力科学研究院 | Frequency stability control method and device for multi-direct-current asynchronous transmitting-end power grid |
| CN109103919A (en) * | 2018-10-12 | 2018-12-28 | 深圳供电局有限公司 | The capacity estimation method of flexible HVDC transmission system in a kind of urban distribution network |
| CN111082439A (en) * | 2020-01-07 | 2020-04-28 | 南方电网科学研究院有限责任公司 | Power grid coordination stability control method, system and equipment |
| CN111355255A (en) * | 2020-02-20 | 2020-06-30 | 山东大学 | Virtual modulation-based DC overvoltage suppression method and system after lockout fault |
| CN113904318A (en) * | 2020-07-06 | 2022-01-07 | 南京南瑞继保电气有限公司 | Calculation and generator tripping distribution method for power surplus margin of direct-current power grid in emergency |
| CN113904318B (en) * | 2020-07-06 | 2024-04-05 | 南京南瑞继保电气有限公司 | Calculation and cut-off distribution method for emergency power surplus of direct-current power grid |
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