CN202535071U - Parallel connection system of power grid and wind power station by flexible direct current system - Google Patents
Parallel connection system of power grid and wind power station by flexible direct current system Download PDFInfo
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- CN202535071U CN202535071U CN 201220128377 CN201220128377U CN202535071U CN 202535071 U CN202535071 U CN 202535071U CN 201220128377 CN201220128377 CN 201220128377 CN 201220128377 U CN201220128377 U CN 201220128377U CN 202535071 U CN202535071 U CN 202535071U
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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
- 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]
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Abstract
The utility model discloses a parallel connection system of a power grid and a wind power station by a flexible direct current system. The system comprises a 35-KV switch station, a 35-KV wind power station, a first 35-KV convertor station and a second 35-KV convertor station. Specifically, the 35-KV wind power station is connected with the 35-KV switch station by an alternating current line circuit; the first 35-KV convertor station and the second 35-KV convertor station are connected by direct current line serial connection, wherein the first 35-KV convertor station is connected with the 35-KV wind power station by an alternating current line circuit and the second 35-KV convertor station is connected with the 35-KV switch station by an alternating current line circuit. Beside, the first 35-KV convertor station and the second 35-KV convertor station form a flexible flexibility treatment system. According to the utility model, the power grid can be connected with the wind power station by alternating current lines and the flexible flexibility treatment system, thereby improving reliability of grid-connected operation of the wind power station. The flexible direct current power transmission enables various effects on frequency voltage adjustment and dynamic stability by a wind power access system to be eliminated; dynamic reactive power reserve of the system can be increased; the power quality can be improved; and adverse effects on the system caused by wind power grid connection can be eliminated.
Description
Technical field
The utility model relates to a kind of network system, is specifically related to a kind of electrical network through flexible direct current system and wind energy turbine set and welding system.
Background technology
At present, the voltage of the present stable state of quality table of wind power generation, stable frequency, safe continuously power supply and minimizing are polluted power grid environment.The position multidigit of wind energy turbine set is in remote districts, away from electrical network, for the wind energy smooth delivery of power is gone out; In the actual motion, the general employing maked somebody a mere figurehead or two kinds of outlet methods of cable, according to the separate unit fan capacity; There is the shared case of two typhoon machines to become, or form of maybe networking such as case change of the corresponding use of a blower fan, in design process; In line with reducing project cost, improve the principle of power supply reliability, in conjunction with the electric position that receives of wind energy turbine set connecting system; Feasible and the economy of transmission line capability, transmission distance is confirmed wind energy turbine set outlet electric pressure and feeder number, simultaneously according to the wind energy turbine set planning of finally installing, and considers wind energy turbine set geography, landform, reaches actual conditions such as outlet; Multiple networking mode is carried out Technological Economy relatively, the optimum way of selected wind energy turbine set area power grid power supply.
The wind-powered electricity generation net is that to the shortcoming of mains supply it is to the impact of net capacity, and the generated output of wind-powered electricity generation depends on wind-force fully; Wind-force itself changes big, and is under-supply in the time of possibly causing the electrical network shortcoming, when network load is low; High like generated output, then unnecessary electricity can only cause the fluctuation of electrical network by artificial raising load; The whole distract dispatching of power netwoks is posed a big pressure the harm power grid security.
The utility model content
The utility model provides a kind of electrical network through flexible direct current system and wind energy turbine set and welding system, has improved wind farm grid-connected reliability of operation, overcomes wind-powered electricity generation and inserts the influence in voltage to frequency adjustment and dynamic stability to system.
For realizing above-mentioned purpose, the utility model provides a kind of electrical network through flexible direct current system and wind energy turbine set and welding system, is characterized in that this system comprises:
35 kilovolts of switchyards;
35 kilovolts of wind energy turbine set, it is connected through the ac line circuit with 35 kilovolts of switchyards;
Through the one 35 kilovolt of current conversion station and the 2 35 kilovolt of current conversion station that ac line is connected in series, the one 35 kilovolt of current conversion station connects 35 kilovolts of wind energy turbine set through the ac line circuit, and the 2 35 kilovolt of current conversion station connects 35 kilovolts of switchyards through the ac line circuit;
The one 35 kilovolt of current conversion station and the 2 35 kilovolt of current conversion station are formed flexibility and are controlled gentle system.
35 kilovolts of above-mentioned switchyards comprise 35 kilovolts of buses of 35 kilovolts of buses of first switchyard and second switch station;
Be connected in series with 35 kilovolts of switches of switchyard between 35 kilovolts of bus outside electric power network of above-mentioned first switchyard system, itself and network system; 35 kilovolts of buses of this first switchyard also are connected with the 2 35 kilovolt of current conversion station circuit, are connected in series with 35 kilovolts of switches of switchyard and transformer between itself and the 2 35 kilovolt of current conversion station;
Be connected in series with 35 kilovolts of switches of switchyard between the above-mentioned second switch station 35 kilovolts of bus outside electric power network system, itself and network system; The 35 kilovolts of buses in this second switch station also are connected with 35 kilovolts of wind energy turbine set circuit, are connected in series with 35 kilovolts of switches of switchyard and transformer between itself and 35 kilovolts of wind energy turbine set;
35 kilovolts of switches of above-mentioned switchyard are in running status.
Above-mentioned the one 35 kilovolt of current conversion station and the 2 35 kilovolt of current conversion station comprise the 35 kilovolts of buses of current conversion station that are connected in series, 35 kilovolts of switches, change of current change and converter valve;
The one 35 kilovolt of current conversion station is connected through the ac line circuit with the converter valve of the 2 35 kilovolt of current conversion station;
35 kilovolts of bus circuits of the current conversion station of the one 35 kilovolt of current conversion station connect 35 kilovolts of wind energy turbine set;
35 kilovolts of bus circuits of the current conversion station of the 2 35 kilovolt of current conversion station connect 35 kilovolts of switchyards;
Above-mentioned converter valve adopts the voltage-source type converter valve based on the modular multilevel technology.
35 kilovolts of above-mentioned wind energy turbine set comprise 35 kilovolts of buses of first wind energy turbine set and the 35 kilovolts of buses of second wind energy turbine set that are connected in series, and the 10 kilovolts of buses of first wind energy turbine set that are connected in series and 10 kilovolts of buses of second wind energy turbine set;
Circuit is connected with the stand-by heat switch between 35 kilovolts of buses of above-mentioned first wind energy turbine set and 35 kilovolts of buses of second wind energy turbine set; 35 kilovolts of buses of the 35 kilovolts of buses of this first wind energy turbine set and second wind energy turbine set are connected the one 35 kilovolt of current conversion station and 35 kilovolts of switchyards through 35 kilovolts of switching circuits respectively;
Circuit is connected with the stand-by heat switch between above-mentioned 10 kilovolts of buses of first wind energy turbine set and 10 kilovolts of buses of second wind energy turbine set; Circuit is connected with several wind-driven generators on 10 kilovolts of buses of this first wind energy turbine set and 10 kilovolts of buses of second wind energy turbine set;
Above-mentioned 10 kilovolts of buses of the 35 kilovolts of buses of first wind energy turbine set and first wind energy turbine set are connected through 35/10 kv transformer circuit;
Above-mentioned 10 kilovolts of buses of the 35 kilovolts of buses of second wind energy turbine set and second wind energy turbine set are connected through 35/10 kv transformer circuit.
Electrical network links to each other through two loops with wind energy turbine set; Wherein 35 kilovolts of switchyards of a route directly insert 35 kilovolts of buses of second wind energy turbine set of 35 kilovolts of wind energy turbine set through ac line; And link to each other with wind-driven generator by 35/10 kv transformer, realize being incorporated into the power networks of wind-driven generator and system;
35 kilovolts of switchyards of an other route insert flexible the 2 35 kilovolt of current conversion station controlling gentle system earlier and convert direct current into; The ac line of passing through of the 2 35 kilovolt of current conversion station converter valve links to each other with the converter valve of the one 35 kilovolt of current conversion station; Direct current is converted into interchange; And be converted into 35 kilovoltage grades through change of current change once more; Insert 35 kilovolts of buses of first wind energy turbine set of 35 kilovolts of wind energy turbine set again through ac line, and link to each other with wind-driven generator, realize being incorporated into the power networks of wind-driven generator and system by 35/10 kv transformer.
The utility model electrical network is compared with prior art with wind energy turbine set and welding system through flexible direct current system; Its advantage is; The utility model makes electrical network control gentle system through ac line and flexibility to link to each other with wind energy turbine set, both improved wind farm grid-connected reliability of operation, simultaneously flexible DC power transmission can overcome again wind-powered electricity generation insert to system voltage to frequency adjust and dynamic stability aspect many influences of bringing; Increase the system dynamic reactive-load deposit; Improve the quality of power supply, solve the problem that nonlinear-load, impact load and three railway carriage or compartment imbalances etc. produce, solved the adverse effect that causes to system behind the wind-electricity integration to a certain extent.
Description of drawings
Fig. 1 is the circuit module figure of the utility model electrical network through flexible direct current system and wind energy turbine set and welding system;
Fig. 2 is the circuit theory diagrams of the utility model electrical network through 35 kilovolts of switchyards of flexible direct current system and wind energy turbine set and welding system;
Fig. 3 is the circuit theory diagrams of the utility model electrical network through 35 kilovolts of current conversion stations of flexible direct current system and wind energy turbine set and welding system;
Fig. 4 is the circuit theory diagrams of the utility model electrical network through 35 kilovolts of wind energy turbine set of flexible direct current system and wind energy turbine set and welding system.
Embodiment
Below in conjunction with accompanying drawing, further specify the specific embodiment of the utility model.
As shown in Figure 1; The utility model discloses a kind of electrical network through flexible direct current system and wind energy turbine set and welding system; This system comprises 1,35 kilovolts of wind energy turbine set of 35 kilovolts of switchyards the 2, the 1 kilovolt of current conversion station 3 and the 2 35 kilovolt of current conversion station 4, and electrical network links to each other through two loops with wind energy turbine set.
Wherein the ac line circuit through overhead transmission line or cable line is connected between one tunnel, 35 kilovolts of switchyards 1 and the 35 kilovolts of wind energy turbine set 2.
Another road, 35 kilovolts of switchyards 1 ac line circuit through overhead transmission line or cable line connects the ac line circuit of 4,35 kilovolts of wind energy turbine set 2 of the 2 35 kilovolt of current conversion station through overhead transmission line or cable line and connects the one 35 kilovolt of current conversion station 3.Connect through direct current cables or overhead wire circuit between the one 35 kilovolt of current conversion station 3 and the 2 35 kilovolt of current conversion station 4, the one 35 kilovolt of current conversion station 3 and the 2 35 kilovolt of current conversion station 4 are formed flexibility and are controlled gentle system.
As shown in Figure 2,35 kilovolts of switchyards 1 include the two-way circuit, include 35 kilovolts of buses 13 of first switchyard in one the tunnel, and this route road circuit connects the flexibility that 35 kilovolts of current conversion stations form and controls gentle system.Include the 35 kilovolts of buses 14 in second switch station in another road, this circuit directly connects 35 kilovolts of wind energy turbine set 2 through ac line.
35 kilovolts of buses 13 of first switchyard are connected with the outside electric power network circuit system, are connected in series with 35 kilovolts of switches 11 of switchyard between 35 kilovolts of buses 13 of first switchyard and the network system.35 kilovolts of buses 13 of this first switchyard also are connected with the 2 35 kilovolt of current conversion station 4 circuit that flexibility is controlled gentle system, are connected in series with 35 kilovolts of switches of switchyard 11 and transformer 12 between itself and the 2 35 kilovolt of current conversion station 4.35 kilovolts of switches of this switchyard 11 are 35 kilovolts of switches of HD4 type (running status), and it is in running status.Transformer 12 is a SZ9-20000/35 type transformer.
The 35 kilovolts of buses 14 in second switch station are the outside electric power network system also, is connected in series with 35 kilovolts of switches 11 of switchyard between itself and the network system.The 35 kilovolts of buses 14 in this second switch station are connected with 35 kilovolts of wind energy turbine set 2 circuit, are connected in series with 35 kilovolts of switches of switchyard 11 and transformer 12 between itself and the 35 kilovolts of wind energy turbine set 2.35 kilovolts of switches of this switchyard 11 are 35 kilovolts of switches of HD4 type (running status), and it is in running status.Transformer 12 is a SZ9-20000/35 type transformer.
As shown in Figure 3, form flexible the one 35 kilovolt of current conversion station 3 and the 2 35 kilovolt of current conversion station 4 of controlling gentle system and comprise 31,35 kilovolts of switches 32 of 35 kilovolts of buses of current conversion station, change of current change 33 and the converter valve 34 that is connected in series.The change of current becomes 33 and adopts the change of current of ZZS-20000/36.5 type to become, the voltage-source type converter valve (M60) that converter valve 34 adopts based on modular multilevel (MMC) technology.
The converter valve 34 of the one 35 kilovolt of current conversion station 3 is connected with the ac line circuit of the converter valve 34 of the 2 35 kilovolt of current conversion station 4 through direct current cables or overhead wire.35 kilovolts of buses 31 of the current conversion station of the one 35 kilovolt of current conversion station 3 are connected with 35 kilovolts of wind energy turbine set 2 circuit.35 kilovolts of buses 31 of the current conversion station of the 2 35 kilovolt of current conversion station 4 are connected with 35 kilovolts of switchyard 1 circuit.
As shown in Figure 4,35 kilovolts of wind energy turbine set 2 comprise 35 kilovolts of buses 21 of first wind energy turbine set and the 35 kilovolts of buses 22 of second wind energy turbine set that are connected in series, and the 10 kilovolts of buses 23 of first wind energy turbine set that are connected in series and 10 kilovolts of buses 24 of second wind energy turbine set.
Connect through stand-by heat switch 26 circuit between 35 kilovolts of buses 21 of first wind energy turbine set and 35 kilovolts of buses 22 of second wind energy turbine set, stand-by heat switch 26 is 35 kilovolts of switches of HD4 type (hot stand-by duty).
Connect through stand-by heat switch 26 circuit between 10 kilovolts of buses 23 of first wind energy turbine set and 10 kilovolts of buses 24 of second wind energy turbine set, stand-by heat switch 26 is 35 kilovolts of switches of HD4 type (hot stand-by duty).
10 kilovolts of bus 23 circuit of the 35 kilovolts of buses 21 of first wind energy turbine set and first wind energy turbine set are connected to an electric energy transmitting circuit: 35 kilovolts of buses 21 of first wind energy turbine set are connected flexible one 35 kilovolts of current conversion stations 3 controlling gentle system through 5 kilovolts of switching circuits.Circuit is connected with several wind-driven generators 25 on 10 kilovolts of buses 23 of first wind energy turbine set.Circuit is connected with one 35/10 kv transformer between 35 kilovolts of buses 21 of first wind energy turbine set and 10 kilovolts of buses 23 of first wind energy turbine set, and these transformer two ends are connected with 35 kilovolts of switches respectively.
10 kilovolts of buses 24 tunnel of the 35 kilovolts of buses 22 of second wind energy turbine set and second wind energy turbine set are connected to another electric energy transmitting circuit: 35 kilovolts of buses of second wind energy turbine set 22 are crossed the ac line that 5 kilovolts of switch direct circuits are connected overhead transmission line, and directly connect 35 kilovolts of switchyards 1 through ac line.Circuit is connected with several wind-driven generators 25 on 10 kilovolts of buses 24 of second wind energy turbine set.Circuit is connected with one 35/10 kv transformer between 35 kilovolts of buses 22 of second wind energy turbine set and 10 kilovolts of buses 24 of second wind energy turbine set, and these transformer two ends are connected with 35 kilovolts of switches respectively.
Above-mentioned wind-driven generator 25 adopts GE1.5S wind-driven generator (speed-changing oar-changing double-fed blower fan).
The utility model electrical network is following through the workflow of flexible direct current system and wind energy turbine set and welding system:
Electrical network links to each other through two loops with wind energy turbine set; Wherein 35 kilovolts of outlets of 35 kilovolts of switchyards 1 of a route (or 35 kilovolts of outlets of transformer station); Insert 35 kilovolts of buses 22 of second wind energy turbine set of 35 kilovolts of wind energy turbine set 2 through 35 kilovolts of overhead transmission lines or cable line; And link to each other with wind-driven generator 25 by 35/10 kv transformer, realize being incorporated into the power networks of wind-driven generator 25 and system.
35 kilovolts of outlets of 35 kilovolts of switchyards 1 of an other route (or 35 kilovolts of outlets of transformer station); Insert flexible 35 kilovolts of buses controlling the 2 35 kilovolt of current conversion station 4 of gentle system through 35 kilovolts of overhead transmission lines or cable line earlier; Become 33 by 35 kilovolts of changes of current and be converted into 30 specified kilovoltage grades of direct current system, and convert direct current into through voltage-source type converter valve 34, this process is called rectification; And link to each other with the converter valve 34 of the one 35 kilovolt of current conversion station 3 through direct current cables or overhead wire; Direct current is converted into this process of interchange is called inversion, and be converted into 35 kilovoltage grades through 35 kilovolts of changes of current changes 33 once more, again through exchanging 35 kilovolts of buses 21 of first wind energy turbine set that overhead wire or cable insert 35 kilovolts of wind energy turbine set 2; And link to each other with wind-driven generator 25 by 35/10 kv transformer, realize being incorporated into the power networks of wind-driven generator 25 and system.
Although the content of the utility model has been done detailed introduction through above-mentioned preferred embodiment, will be appreciated that above-mentioned description should not be considered to the restriction to the utility model.After those skilled in the art have read foregoing, for the multiple modification of the utility model with to substitute all will be conspicuous.Therefore, the protection range of the utility model should be limited appended claim.
Claims (4)
1. an electrical network is characterized in that through flexible direct current system and wind energy turbine set and welding system this system comprises:
35 kilovolts of switchyards (1);
35 kilovolts of wind energy turbine set (2), it is connected through the ac line circuit with described 35 kilovolts of switchyards (1);
The one 35 kilovolt of current conversion station (3) and the 2 35 kilovolt of current conversion station (4) that are connected in series through ac line; The one 35 kilovolt of current conversion station (3) connects 35 kilovolts of wind energy turbine set (2) through the ac line circuit, and the 2 35 kilovolt of current conversion station (4) connects 35 kilovolts of switchyards (1) through the ac line circuit;
The one 35 kilovolt of current conversion station (3) and the 2 35 kilovolt of current conversion station (4) are formed flexibility and are controlled gentle system.
2. electrical network as claimed in claim 1 is characterized in that through flexible direct current system and wind energy turbine set and welding system described 35 kilovolts of switchyards (1) comprise 35 kilovolts of buses of first switchyard (13) and the 35 kilovolts of buses in second switch station (14);
Be connected in series with 35 kilovolts of switches of switchyard (11) between said 35 kilovolts of buses of first switchyard (13) the outside electric power network system, itself and network system; 35 kilovolts of buses of this first switchyard (13) also are connected with the 2 35 kilovolt of current conversion station (4) circuit, are connected in series with 35 kilovolts of switches of switchyard (11) and transformer (12) between itself and the 2 35 kilovolt of current conversion station (4);
Be connected in series with 35 kilovolts of switches of switchyard (11) between the 35 kilovolts of buses in said second switch station (14) the outside electric power network system, itself and network system; The 35 kilovolts of buses in this second switch station (14) also are connected with 35 kilovolts of wind energy turbine set (2) circuit, are connected in series with 35 kilovolts of switches of switchyard (11) and transformer (12) between itself and the 35 kilovolts of wind energy turbine set (2);
35 kilovolts of switches of described switchyard (11) are in running status.
3. electrical network as claimed in claim 1 is through flexible direct current system and wind energy turbine set and welding system; It is characterized in that described the one 35 kilovolt of current conversion station (3) and the 2 35 kilovolt of current conversion station (4) comprise the 35 kilovolts of buses of current conversion station (31), 35 kilovolts of switches (32), the change of current that are connected in series and become (33) and converter valve (34);
The one 35 kilovolt of current conversion station (3) is connected through the ac line circuit with the converter valve (34) of the 2 35 kilovolt of current conversion station (4);
35 kilovolts of buses of the current conversion station of the one 35 kilovolt of current conversion station (3) (31) circuit connects 35 kilovolts of wind energy turbine set (2);
35 kilovolts of buses of the current conversion station of the 2 35 kilovolt of current conversion station (4) (31) circuit connects 35 kilovolts of switchyards (1);
Described converter valve (34) adopts the voltage-source type converter valve based on the modular multilevel technology.
4. electrical network as claimed in claim 1 is through flexible direct current system and wind energy turbine set and welding system; It is characterized in that; Described 35 kilovolts of wind energy turbine set (2) comprise 35 kilovolts of buses of first wind energy turbine set (21) and the 35 kilovolts of buses of second wind energy turbine set (22) that are connected in series, and the 10 kilovolts of buses of first wind energy turbine set (23) that are connected in series and 10 kilovolts of buses of second wind energy turbine set (24);
Circuit is connected with stand-by heat switch (26) between said 35 kilovolts of buses of first wind energy turbine set (21) and the 35 kilovolts of buses of second wind energy turbine set (22); 35 kilovolts of buses of this first wind energy turbine set (21) are connected the one 35 kilovolt of current conversion station (3) and 35 kilovolts of switchyards (1) through 35 kilovolts of switching circuits respectively with 35 kilovolts of buses of second wind energy turbine set (22);
Circuit is connected with stand-by heat switch (26) between described 10 kilovolts of buses of first wind energy turbine set (23) and the 10 kilovolts of buses of second wind energy turbine set (24); 10 kilovolts of buses of this first wind energy turbine set (23) and 10 kilovolts of buses of second wind energy turbine set (24) are gone up circuit and are connected with several wind-driven generators (25);
Described 35 kilovolts of buses of first wind energy turbine set (21) are connected through 35/10 kv transformer circuit with 10 kilovolts of buses of first wind energy turbine set (23);
Described 35 kilovolts of buses of second wind energy turbine set (22) are connected through 35/10 kv transformer circuit with 10 kilovolts of buses of second wind energy turbine set (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220128377 CN202535071U (en) | 2012-03-30 | 2012-03-30 | Parallel connection system of power grid and wind power station by flexible direct current system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220128377 CN202535071U (en) | 2012-03-30 | 2012-03-30 | Parallel connection system of power grid and wind power station by flexible direct current system |
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| CN202535071U true CN202535071U (en) | 2012-11-14 |
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| CN 201220128377 Expired - Lifetime CN202535071U (en) | 2012-03-30 | 2012-03-30 | Parallel connection system of power grid and wind power station by flexible direct current system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103296692A (en) * | 2013-06-21 | 2013-09-11 | 国家电网公司 | Control device and method for putting converter station into flexible direct current power transmission system |
| CN103414182A (en) * | 2013-06-04 | 2013-11-27 | 南方电网科学研究院有限责任公司 | Smooth switching method for switching flexible direct current transmission system from parallel operation into isolated island operation |
| CN112531779A (en) * | 2020-12-07 | 2021-03-19 | 国网新疆电力有限公司昌吉供电公司 | Multi-area power grid connection method |
-
2012
- 2012-03-30 CN CN 201220128377 patent/CN202535071U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414182A (en) * | 2013-06-04 | 2013-11-27 | 南方电网科学研究院有限责任公司 | Smooth switching method for switching flexible direct current transmission system from parallel operation into isolated island operation |
| CN103414182B (en) * | 2013-06-04 | 2016-06-29 | 南方电网科学研究院有限责任公司 | A kind of flexible direct current power transmission system is from the smooth-switching method transferring islet operation side by side to |
| CN103296692A (en) * | 2013-06-21 | 2013-09-11 | 国家电网公司 | Control device and method for putting converter station into flexible direct current power transmission system |
| CN112531779A (en) * | 2020-12-07 | 2021-03-19 | 国网新疆电力有限公司昌吉供电公司 | Multi-area power grid connection method |
| CN112531779B (en) * | 2020-12-07 | 2024-01-23 | 国网新疆电力有限公司昌吉供电公司 | Multi-region power grid wiring method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20121114 |