CN104124689A - Flexible direct current active power control method for alternating current and direct current hybrid power transmission system - Google Patents
Flexible direct current active power control method for alternating current and direct current hybrid power transmission system Download PDFInfo
- Publication number
- CN104124689A CN104124689A CN201410329502.9A CN201410329502A CN104124689A CN 104124689 A CN104124689 A CN 104124689A CN 201410329502 A CN201410329502 A CN 201410329502A CN 104124689 A CN104124689 A CN 104124689A
- Authority
- CN
- China
- Prior art keywords
- active power
- power
- flexible
- direct current
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
- Rectifiers (AREA)
Abstract
The invention relates to a flexible direct current active power control method for an alternating current and direct current hybrid power transmission system. The flexible direct current active power control method is characterized in that the power transmission system comprises one or more flexible direct current transmission lines which are in parallel operation to one or more alternating current lines; during normal operation, the flexible direct current transmission lines are operated as per set rated active power and reactive power, and active power of the alternating current lines is not reversely transmitted by automatically adjusting active power of the flexible direct current transmission lines. According to the flexible direct current active power control method for the alternating current and direct current hybrid power transmission system, active power control requirements of a flexible direct current device can be met, linear control links are simple, and the method is simple to implement in engineering and good in control stability.
Description
Technical field
The present invention relates to flexible DC power transmission (the Voltage Source Converter based High Voltage Direct Current in electric power system field of power transmission, VSC-HVDC) technical field, especially a kind of flexible direct current active power control method for hybrid AC/DC power transmission systems.
Background technology
Flexible DC power transmission is a kind of high voltage dc transmission technology that starts development the nineties in 20th century, its have active power and reactive power independently fast control, can be to advantages such as passive network power supplies.Existing tens flexible direct current engineerings put into operation in the world at present, and first flexible direct current engineering Shanghai Nanhui flexible DC power transmission engineering of China also put into operation in 2011.
In the engineering of going into operation, not yet occur interchange-flexible direct current hybrid power system as depicted in figs. 1 and 2, but existing Fig. 1 is building with exchanging shown in Fig. 2-flexible direct current hybrid power system at present.In hybrid AC/DC power transmission systems main circuit diagram as shown in Figure 3, in the time of the design of flexible direct current circuit rated power, conventionally depend on workload demand Pload under the large mode of receiving end electrical network.When operation of power networks is during in large mode, AC system power P ac and flexible direct current line power Pdc all flow to receiving end electrical network from sending end electrical network.And when receiving end operation of power networks is during in little mode, may occur that the burden with power Pload of receiving end electrical network is less than the situation of flexible direct current line power transmission power Pdc, now Pdc cannot dissolve completely at receiving end network, to send sending end network back to by alternating current circuit, occur load bypass, AC system power P ac flows back to sending end electrical network by receiving end electrical network.In the time there is this operational mode, in DC line, unnecessary line loss will be produced by the extra power of carrying of DC line, the AC power of simultaneously sending receiving end network back to by alternating current circuit also will produce line loss, obvious this kind of mode increased the network loss of transmission system, both unreasonable also uneconomical.
Based on the problems referred to above, can be by advance load being predicted, the active power set point of adjusting in advance flexible direct current device active power control end reduces the transmission power of flexible direct current circuit, thereby prevents that sending from appearring in alternating current circuit power.But in the time that load increases, need again again to adjust.The method of this artificial adjustment can not realize real-time adjusting, has caused difficulty to operation.Therefore must need a kind of control method automatically to regulate the transmission power of soft straight device, to address the above problem.
Summary of the invention
In view of this, the object of this invention is to provide a kind of flexible direct current active power control method for hybrid AC/DC power transmission systems, by introduce the active power feedback of alternating current circuit in the active power link of soft straight device, soft straight device active power delivery value is automatically adjusted, thereby prevent that alternating current circuit emergent power is reverse.
The present invention adopts following scheme to realize: a kind of flexible direct current active power control method for hybrid AC/DC power transmission systems, it is characterized in that: transmission system comprises one or more rounds flexible DC power transmission circuit, and with one or more rounds alternating current circuit paired running; When normal operation, flexible DC power transmission circuit, by set specified active power and reactive power operation, by the active power of automatic adjusting flexible DC power transmission circuit, makes the active power of alternating current circuit not occur oppositely sending.
In an embodiment of the present invention, the active power of described adjusting flexible DC power transmission circuit comprises the following steps:
S01: obtain alternating current circuit active power value P
ac, described alternating current circuit active power value P
actake from alternating current circuit and be subject to distolateral substation bus bar place, obtain by measurement, to inject receiving end electrical network for just, and value is imported into the control system of flexible direct current converter valve by communication mode;
S02: obtain flexible DC power transmission circuit active power value P
dc, described flexible DC power transmission circuit active power value P
dctake from the change of current of flexible DC power transmission circuit receiving end inversion side and become exit, obtain by measurement, to inject receiving end electrical network for just, and value is imported into the control system of flexible direct current converter valve by communication mode;
S03: obtain active power bid value; By the alternating current circuit active power value P of described step S01 and step S02 acquisition
acwith flexible DC power transmission circuit active power value P
dccarry out algebraically stack, the value P of gained
addsend in comparator and with the active power reference value P of soft straight device
refcompare described P
addwith P
refin smaller value be active power bid value P
ord, flexible DC power transmission circuit active power value P
dcwill be by P
ordcontrol; Therefore, work as P
acfor timing, P
addbe greater than P
ref, now P
ordget P
ref, have P
dc=P
ref; Work as P
acwhen negative, P
addbe less than P
ref, now P
ordget P
add, have P
dc=P
add;
S04: realize active power control; By the active power bid value P obtaining in described step S03
ordas the active power control target in the control of soft straight device outer shroud, by the direct axis component of alternating current is controlled and made the active power of soft straight line path reach bid value.
In an embodiment of the present invention, the concrete grammar of described step S04 is: first by described P
ordwith P
dctry to achieve wattful power rate variance P
error, then by described wattful power rate variance P
errorafter FEEDBACK CONTROL link, obtain the reference value i of the alternating current direct axis component after converter valve inversion
dref, by i
drefsend in the interior ring controller of flexible direct current device, by interior ring control, dq inverse transformation and modulation strategy link, obtain converter valve trigger impulse, by rectification and the inversion of converter valve, thereby make flexible DC power transmission circuit active-power P
dcvalue reaches active power bid value P
ord.
In an embodiment of the present invention, described FEEDBACK CONTROL link is linear PI controlling unit.
The present invention can meet the active power control requirement of soft straight device, and controlling unit is simple, all adopts Linear Control, in engineering, easily realizes, and control stability is good.
Brief description of the drawings
Fig. 1 is interchange-flexible direct current hybrid power system in prior art.
Fig. 2 is the stream hybrid AC/DC power transmission systems arranged side by side with single time flexible direct current that typically singly backcross.
Fig. 3 is hybrid AC/DC power transmission systems equivalence main circuit diagram in prior art.
Fig. 4 is inversion side novel flexible direct current active power control principle block diagram in the present invention.
Fig. 5 is that in the present invention, inversion side is determined ac bus voltage control theory diagram.
Fig. 6 is rectification side constant DC voltage control theory diagram in the present invention.
Fig. 7 is that in the present invention, rectification side is determined ac bus voltage control theory diagram.
Fig. 8 encircles control principle block diagram in flexible direct current control system in the present invention.
Fig. 9 is oscillogram when load is for 1100MW in the present invention.
Figure 10 be in the present invention load for 1100MW transition is during to 900MW, then by 900MW transition oscillogram during to 1100MW.
Embodiment
For making object of the present invention, technical scheme and advantage clearer, below will, by specific embodiment and relevant drawings, the present invention be described in further detail.
Hybrid AC/DC power transmission systems adopts alternating current circuit and flexible direct current circuit side by side to receiving end mains supply, in the time that receiving end causes alternating current circuit to occur that backward power is carried because of reasons such as load reductions, this method by introducing alternating current circuit Feedback of Power and controlling unit in soft straight device active power controlling unit, transmission power to soft straight line path automatically adjusts, and then the power of eliminating alternating current circuit appearance arranged side by side is with it reverse, thereby solve the problem that the trend irrational distribution that hybrid AC/DC power transmission systems occurs, network loss increase.
The present embodiment provides a kind of flexible direct current active power control method for hybrid AC/DC power transmission systems, and transmission system comprises one or more rounds flexible DC power transmission circuit, and with one or more rounds alternating current circuit paired running; When normal operation, flexible DC power transmission circuit, by set specified active power and reactive power operation, by the active power of automatic adjusting flexible DC power transmission circuit, makes the active power of alternating current circuit not occur oppositely sending.
The control method of the active power of described adjusting flexible DC power transmission circuit, can independently apply in each time flexible direct current circuit, alternating current circuit Feedback of Power and controlling unit are introduced, in the time that one or more rounds alternating current circuit power is all carried from sending end electrical network to the passive electrical network of receiving end, flexible direct current line power is controlled by the power in normal when operation of rated power or setting, in the time having alternating current circuit power to occur sending from receiving end electrical network sending end to sending end electrical network, flexible direct current line power reduces, by setting close to the required performance number of actual load, prevent that alternating current circuit emergent power is reverse, as shown in Figure 4, specifically comprise the following steps:
S01: obtain alternating current circuit active power value P
ac, described alternating current circuit active power value P
actake from alternating current circuit and be subject to distolateral substation bus bar place, obtain by measurement, to inject receiving end electrical network for just, and value is imported into the control system of flexible direct current converter valve by communication mode;
S02: obtain flexible DC power transmission circuit active power value P
dc, described flexible DC power transmission circuit active power value P
dctake from the change of current of flexible DC power transmission circuit receiving end inversion side and become exit, obtain by measurement, to inject receiving end electrical network for just, and value is imported into the control system of flexible direct current converter valve by communication mode;
S03: obtain active power bid value; By the alternating current circuit active power value P of described step S01 and step S02 acquisition
acwith flexible DC power transmission circuit active power value P
dccarry out algebraically stack, the value P of gained
addsend in comparator and with the active power reference value P of soft straight device
refcompare described P
addwith P
refin smaller value be active power bid value P
ord, flexible DC power transmission circuit active power value P
dcwill be by P
ordcontrol; Therefore, work as P
acfor timing, P
addbe greater than P
ref, now P
ordget P
ref, have P
dc=P
ref; Work as P
acwhen negative, P
addbe less than P
ref, now P
ordget P
add, have P
dc=P
add;
S04: realize active power control; By the active power bid value P obtaining in described step S03
ordas the active power control target in the control of soft straight device outer shroud, by the direct axis component of alternating current is controlled and made the active power of soft straight line path reach bid value.
Preferably, the concrete grammar of described step S04 is: first by described P
ordwith P
dctry to achieve wattful power rate variance P
error, then by described wattful power rate variance P
errorafter FEEDBACK CONTROL link, obtain the reference value i of the alternating current direct axis component after converter valve inversion
dref, by i
drefsend in the interior ring controller of flexible direct current device, by links such as interior ring control, dq inverse transformation and modulation strategies, obtain converter valve trigger impulse, by rectification and the inversion of converter valve, thereby make flexible DC power transmission circuit active-power P
dcvalue reaches active power bid value P
ord.
Preferably, described FEEDBACK CONTROL link is linear PI controlling unit.
Below in conjunction with example, the present invention will be described in detail.
Typically singly backcross stream and single time direct current hybrid AC/DC power transmission systems arranged side by side as example describes taking Fig. 2, specifically comprise the following steps:
1. the foundation of emulation main circuit.The hybrid AC/DC power transmission systems of analysis chart 2, can obtain the emulation main circuit diagram shown in Fig. 3: sending end electrical network adopts infinitely great ideal source G to carry out equivalence, circuit sending end bus rated voltage V
1for 230kV; Receiving end electrical network is passive network, adopts load model to carry out equivalence, circuit receiving end busbar voltage V
2for 230kV.Flexible direct current main circuit structure adopts traditional pseudo-bipolar flexible direct current main circuit structure, and DC side rated voltage is+320kV.Power in DC line is P
dc, power on alternating current circuit is P
ac.System parameters is chosen by table 1.
Table 1 simulation example system parameters
2. the control of inversion side.The control of inversion side outer shroud, adopts the novel flexible direct current active power control of the present invention's proposition and determines ac bus voltage control link, and control principle block diagram as shown in Figures 4 and 5.Control principle block diagram shown in Fig. 4 is innovative point of the present invention, the active power reference value P setting by soft straight device
refwith alternating current-direct current bus power superposition value P
addcompare, get the active power bid value P of smaller value as soft straight device
ord.P
ordwith P
dcdifference is passed through after PI controlling unit, generation current direct axis component reference value i
drefsend into interior ring control system.
3. the control of rectification side.The control of rectification side outer shroud, adopts constant DC voltage control and determines ac bus voltage control link, and control principle block diagram as shown in Figure 6 and Figure 7.
4. interior ring control.The interior ring control of rectification side and inversion side all adopts dq shaft current decoupling zero control, and control principle block diagram as shown in Figure 8.I in figure
drefand i
qreffor the electric current d-axis and the quadrature axis component reference value that produce by outer shroud control system, i
dand i
qfor converter transformer valve side electric current converts the electric current d-axis and the quadrature axis component that produce by dq, by the required bridge arm voltage modulating wave ac-dc axis component of generation system after interior ring control, generate modulating wave by dq inverse transformation, send into valve Triggering Control System.
5. valve triggers and controls.Produced after modulating wave by interior ring control system, valve Triggering Control System adopts phase shift carrier wave to modulate, and after generation trigger impulse, the IGBT in converter valve is triggered.
6. simulation process.Carry out simulating, verifying according to step 1～5 controlling unit, simulation result is as shown in Fig. 9～Figure 10.Supposing the system is subject to end load to be initially 1100MW, and when 0.4s, flexible direct current circuit drops into, for avoiding producing significantly vibration, initial active power reference value P
refbe made as 0, alternating current circuit power is still 1100MW; P when 0.5s
refbe made as rated power 1000MW, flexible direct current line power is promoted to rapidly 1000MW, and alternating current circuit power is reduced to 100MW; When 1.1s, be subject to end load to reduce to 900MW, if now DC line power remains unchanged, alternating current circuit power is-100MW, but due to the novel flexible direct current active power control strategy that has adopted the present invention to propose, DC line power is reduced to rapidly 900MW, alternating current circuit power reduces to 0, prevents the condition of giving a present, and system load flow is more reasonable.Be subject to end load to increase to 1100MW at 1.3 o'clock, now DC line power returns to rapidly rated power 1000MW, alternating current circuit power 100MW.
Above simulation results show the feasibility of control strategy of the present invention.
Exemplary embodiment is only illustrative, instead of restriction to scope of the present invention, and scope of the present invention is defined by appended claim.
Above-listed preferred embodiment; the object, technical solutions and advantages of the present invention are further described; institute is understood that; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention; within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (4)
1. for a flexible direct current active power control method for hybrid AC/DC power transmission systems, it is characterized in that: transmission system comprises one or more rounds flexible DC power transmission circuit, and with one or more rounds alternating current circuit paired running; When normal operation, flexible DC power transmission circuit, by set specified active power and reactive power operation, by the active power of automatic adjusting flexible DC power transmission circuit, makes the active power of alternating current circuit not occur oppositely sending.
2. the flexible direct current active power control method for hybrid AC/DC power transmission systems according to claim 1, is characterized in that, the active power of described adjusting flexible DC power transmission circuit comprises the following steps:
S01: obtain alternating current circuit active power value P
ac, described alternating current circuit active power value P
actake from alternating current circuit and be subject to distolateral substation bus bar place, obtain by measurement, to inject receiving end electrical network for just, and value is imported into the control system of flexible direct current converter valve by communication mode;
S02: obtain flexible DC power transmission circuit active power value P
dc, described flexible DC power transmission circuit active power value P
dctake from the change of current of flexible DC power transmission circuit receiving end inversion side and become exit, obtain by measurement, to inject receiving end electrical network for just, and value is imported into the control system of flexible direct current converter valve by communication mode;
S03: obtain active power bid value; By the alternating current circuit active power value P of described step S01 and step S02 acquisition
acwith flexible DC power transmission circuit active power value P
dccarry out algebraically stack, the value P of gained
addsend in comparator and with the active power reference value P of soft straight device
refcompare described P
addwith P
refin smaller value be active power bid value P
ord, flexible DC power transmission circuit active power value P
dcwill be by P
ordcontrol; Therefore, work as P
acfor timing, P
addbe greater than P
ref, now P
ordget P
ref, have P
dc=P
ref; Work as P
acwhen negative, P
addbe less than P
ref, now P
ordget P
add, have P
dc=P
add;
S04: realize active power control; By the active power bid value P obtaining in described step S03
ordas the active power control target in the control of soft straight device outer shroud, by the direct axis component of alternating current is controlled and made the active power of soft straight line path reach bid value.
3. the flexible direct current active power control method for hybrid AC/DC power transmission systems according to claim 2, is characterized in that, the concrete grammar of described step S04 is: first by described P
ordwith P
dctry to achieve wattful power rate variance P
error, then by described wattful power rate variance P
errorafter FEEDBACK CONTROL link, obtain the reference value i of the alternating current direct axis component after converter valve inversion
dref, by i
drefsend in the interior ring controller of flexible direct current device, by interior ring control, dq inverse transformation and modulation strategy link, obtain converter valve trigger impulse, by rectification and the inversion of converter valve, thereby make flexible DC power transmission circuit active-power P
dcvalue reaches active power bid value P
ord.
4. the flexible direct current active power control method for hybrid AC/DC power transmission systems according to claim 3, is characterized in that: described FEEDBACK CONTROL link is linear PI controlling unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410329502.9A CN104124689B (en) | 2014-07-11 | 2014-07-11 | For the flexible direct current active power controller method of hybrid AC/DC power transmission systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410329502.9A CN104124689B (en) | 2014-07-11 | 2014-07-11 | For the flexible direct current active power controller method of hybrid AC/DC power transmission systems |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104124689A true CN104124689A (en) | 2014-10-29 |
| CN104124689B CN104124689B (en) | 2016-03-09 |
Family
ID=51770006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410329502.9A Active CN104124689B (en) | 2014-07-11 | 2014-07-11 | For the flexible direct current active power controller method of hybrid AC/DC power transmission systems |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104124689B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104518524A (en) * | 2014-12-29 | 2015-04-15 | 南京南瑞继保电气有限公司 | Method and device for controlling power of withdrawn hierarchically connected direct-current transmission valve group |
| CN106602587A (en) * | 2017-01-13 | 2017-04-26 | 全球能源互联网研究院 | Additional power control method and device suitable for flexible direct current transmission system |
| CN106911134A (en) * | 2017-04-24 | 2017-06-30 | 许继集团有限公司 | A kind of method and system for stabilizing distribution network load busbar voltage fluctuation |
| CN107069736A (en) * | 2017-04-19 | 2017-08-18 | 国网福建省电力有限公司 | For the urgent Poewr control method of AC/DC Hybrid Transmission System containing flexible direct current |
| CN107809118A (en) * | 2016-09-09 | 2018-03-16 | 贵州电网有限责任公司电力调度控制中心 | Design method of ring-opening scheme of electromagnetic ring network |
| CN110165685A (en) * | 2018-02-11 | 2019-08-23 | ***通信集团设计院有限公司 | A kind of batteries to store energy inverter and its control method |
| CN114629126A (en) * | 2022-04-18 | 2022-06-14 | 广东电网有限责任公司电力调度控制中心 | Control method and system for two-area system interconnected by alternating current and multi-loop direct current |
| US11404878B2 (en) | 2018-03-13 | 2022-08-02 | Supergrid Institute | Method for controlling an electrical transmission link including a direct current high voltage line |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3079083B1 (en) * | 2018-03-13 | 2020-04-10 | Supergrid Institute | METHOD FOR CONTROLLING AN ELECTRICAL TRANSMISSION LINK INCLUDING A CONTINUOUS HIGH VOLTAGE LINE |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102361329A (en) * | 2011-10-18 | 2012-02-22 | 山东电力研究院 | Modeling method for performing dynamic characteristic research on hybrid alternating current/direct current (AC/DC) transmission system |
| CN103368173A (en) * | 2013-05-21 | 2013-10-23 | 南方电网科学研究院有限责任公司 | Active power flow optimization distribution method for alternating current-direct current parallel system containing flexible direct current transmission |
| CN103618308A (en) * | 2013-11-27 | 2014-03-05 | 南方电网科学研究院有限责任公司 | Alternating current line power flow automatic control method of alternating current and flexible direct current parallel power transmission system |
| CN103701140A (en) * | 2014-01-06 | 2014-04-02 | 国家电网公司 | Dynamic reactive power reserve optimization method for improving transient voltage stability of alternating-current and direct-current power grid |
-
2014
- 2014-07-11 CN CN201410329502.9A patent/CN104124689B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102361329A (en) * | 2011-10-18 | 2012-02-22 | 山东电力研究院 | Modeling method for performing dynamic characteristic research on hybrid alternating current/direct current (AC/DC) transmission system |
| CN103368173A (en) * | 2013-05-21 | 2013-10-23 | 南方电网科学研究院有限责任公司 | Active power flow optimization distribution method for alternating current-direct current parallel system containing flexible direct current transmission |
| CN103618308A (en) * | 2013-11-27 | 2014-03-05 | 南方电网科学研究院有限责任公司 | Alternating current line power flow automatic control method of alternating current and flexible direct current parallel power transmission system |
| CN103701140A (en) * | 2014-01-06 | 2014-04-02 | 国家电网公司 | Dynamic reactive power reserve optimization method for improving transient voltage stability of alternating-current and direct-current power grid |
Non-Patent Citations (1)
| Title |
|---|
| 陈江澜等: "特高压交直流混合电网协调电压控制策略及仿真研究", 《电力***保护与控制》 * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104518524A (en) * | 2014-12-29 | 2015-04-15 | 南京南瑞继保电气有限公司 | Method and device for controlling power of withdrawn hierarchically connected direct-current transmission valve group |
| CN107809118B (en) * | 2016-09-09 | 2019-06-28 | 贵州电网有限责任公司电力调度控制中心 | Design method of ring-opening scheme of electromagnetic ring network |
| CN107809118A (en) * | 2016-09-09 | 2018-03-16 | 贵州电网有限责任公司电力调度控制中心 | Design method of ring-opening scheme of electromagnetic ring network |
| CN106602587A (en) * | 2017-01-13 | 2017-04-26 | 全球能源互联网研究院 | Additional power control method and device suitable for flexible direct current transmission system |
| CN106602587B (en) * | 2017-01-13 | 2023-01-24 | 全球能源互联网研究院有限公司 | Additional power control method and device suitable for flexible direct current transmission system |
| CN107069736B (en) * | 2017-04-19 | 2019-08-13 | 国网福建省电力有限公司 | For the urgent Poewr control method of AC/DC Hybrid Transmission System containing flexible direct current |
| CN107069736A (en) * | 2017-04-19 | 2017-08-18 | 国网福建省电力有限公司 | For the urgent Poewr control method of AC/DC Hybrid Transmission System containing flexible direct current |
| CN106911134B (en) * | 2017-04-24 | 2020-02-21 | 许继集团有限公司 | Method and system for stabilizing voltage fluctuation of load bus of power distribution network |
| CN106911134A (en) * | 2017-04-24 | 2017-06-30 | 许继集团有限公司 | A kind of method and system for stabilizing distribution network load busbar voltage fluctuation |
| CN110165685A (en) * | 2018-02-11 | 2019-08-23 | ***通信集团设计院有限公司 | A kind of batteries to store energy inverter and its control method |
| CN110165685B (en) * | 2018-02-11 | 2020-12-04 | ***通信集团设计院有限公司 | Storage battery energy storage inverter and control method thereof |
| US11404878B2 (en) | 2018-03-13 | 2022-08-02 | Supergrid Institute | Method for controlling an electrical transmission link including a direct current high voltage line |
| CN114629126A (en) * | 2022-04-18 | 2022-06-14 | 广东电网有限责任公司电力调度控制中心 | Control method and system for two-area system interconnected by alternating current and multi-loop direct current |
| CN114629126B (en) * | 2022-04-18 | 2024-04-26 | 广东电网有限责任公司电力调度控制中心 | Control method and system for two-area system through alternating current and multi-circuit direct current interconnection |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104124689B (en) | 2016-03-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104124689B (en) | For the flexible direct current active power controller method of hybrid AC/DC power transmission systems | |
| CN109980676B (en) | Microgrid control system and microgrid | |
| CN108054789B (en) | It is a kind of to embed idle and voltage security constraint economic dispatch method | |
| CN107123981B (en) | Flexible direct current and direct current power grid electromechanical transient simulation method and system based on MMC | |
| CN109193746B (en) | Virtual synchronous generator seamless switching method based on direct-current power distribution center | |
| US9270194B2 (en) | Controller for controlling a power converter | |
| CN107248756B (en) | Control method for improving parallel power distribution precision of multiple inverters in micro-grid | |
| CN103701155B (en) | A kind of photovoltaic combining inverter active power dispatch control method | |
| CN108767864B (en) | Power distribution network voltage fluctuation out-of-limit inhibition method based on flexible multi-state switch | |
| US20120261917A1 (en) | Black Start of Wind Turbine Devices | |
| CN105552946B (en) | Direct-current voltage control method and system of flexible ring network controller | |
| JP2013048546A (en) | Power conversion system and method | |
| CN105932706A (en) | Coordinated control method for improving hybrid back-to-back DC system | |
| CN105978038A (en) | Pre-synchronization control method based on virtual impedance | |
| CN105183999B (en) | Electric system maximum short circuit current computational methods containing photovoltaic plant | |
| CN110247419B (en) | Control method suitable for multi-end back-to-back flexible straightening | |
| CN110401196B (en) | AC/DC hybrid micro-grid secondary control method based on unified coordination factor | |
| CN104065104A (en) | Micro grid rapid grid connection method based on three-phase independent regulation | |
| CN108173278A (en) | DC voltage control device, method and the optimization method of new energy VSG frequency modulation | |
| CN107508312A (en) | Energy accumulation current converter and off-network mode operation controller and its control method and device | |
| CN110148948A (en) | A kind of device and method improving power grid end photovoltaic DC-to-AC converter generated output | |
| CN106130055A (en) | The lever variable-power control system of HVDC transmission system and method thereof | |
| CN106099935A (en) | The droop control method that busbar voltage deviation compensates automatically and droop control device | |
| CN106961113B (en) | Unified power flow controller system and converter reactive power control method | |
| CN105977995B (en) | A kind of active reactive control method of flexibility looped network device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |