CN108092270B - Short-circuit current control method and device - Google Patents
Short-circuit current control method and device Download PDFInfo
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Abstract
The invention discloses a short-circuit current control method and a short-circuit current control device. Wherein, the method comprises the following steps: determining a power grid to be accessed to an extra-high voltage area; the method comprises the following steps of obtaining a connection mode of transmission lines among power plants in a power grid, wherein the connection mode of the transmission lines among the power plants in the power grid comprises the following steps: single-circuit lines and double-circuit lines; and controlling short-circuit current based on the connection mode of the power transmission lines between the power plants. The invention solves the technical problem that the power grid is closely connected due to the access of extra-high voltage in the related technology, and the current level is easy to exceed the standard due to the short circuit of the power grid.
Description
Technical Field
The invention relates to the field of power systems, in particular to a short-circuit current control method and device.
Background
Compared with the traditional high-voltage transmission technology, the ultra-high-voltage transmission can improve the transmission capacity and increase the economic transmission distance, and meanwhile, the ultra-high-voltage transmission also has obvious advantages in the aspects of reducing transmission loss, saving occupied land of a line corridor, saving engineering investment and the like. In addition, the extra-high voltage transmission can also greatly improve the safety, reliability, flexibility and economy of the power grid, reduce the pressure of railway transportation and has remarkable social benefit.
With the promotion of national policies, the trend of replacing coal by electricity and replacing oil by electricity is more obvious, the demand of electric energy replacement is further increased, and then an extra-high voltage power transmission channel is built in a specific area according to actual conditions, so that the method has important significance for guaranteeing energy safety, improving energy efficiency, promoting ecological civilization construction and particularly solving the haze problem. However, although some places belong to important power grids and typical receiving end power grids, the requirement on safety and reliability is high, the power transmission network structure adopts a double loop network, and each subarea is supported by a power plant. After the extra-high voltage is connected, the external power receiving capacity of the power receiving end can be increased, and basic parameters and structures of a power grid are changed. Therefore, the access of extra-high voltage transmission can be caused, the power grid connection is tight, and the problem of exceeding the current level caused by short circuit of the power grid is caused.
Aiming at the problem that the power grid is closely connected due to the access of extra high voltage in the related technologies, and the current level exceeds the standard easily caused by the short circuit of the power grid, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a short-circuit current control method and a short-circuit current control device, which are used for at least solving the technical problem that the power grid is closely connected due to the access of extra-high voltage in the related technology, so that the current level generated by the short circuit of the power grid is easy to exceed the standard.
According to an aspect of an embodiment of the present invention, there is provided a short-circuit current control method including: determining a power grid to be accessed to an extra-high voltage area; acquiring the connection mode of the transmission lines among the power plants in the power grid, wherein the connection mode of the transmission lines among the power plants in the power grid comprises the following steps: single-circuit lines and double-circuit lines; and controlling short-circuit current based on the connection mode of the power transmission lines between the power plants.
Optionally, the obtaining of the connection mode of the power transmission lines between the power plants in the power grid includes: judging the connection mode of the power transmission lines among the power plants; classifying the power plant based on the judgment result to obtain a classification result, wherein the classification result comprises: a single-loop line set and a double-loop line set, the single-loop line set including: the connection mode of the power transmission lines between the power plants is a single-circuit line, and the double-circuit line set comprises: the connection mode of the power transmission lines between the power plants is a double-circuit line; and acquiring the connection mode of the power transmission lines among the power plants in the power grid based on the classification result.
Optionally, the controlling the short-circuit current based on the connection mode of the power transmission lines between the power plants includes: determining a power plant with a power generation level lower than a set threshold value in the single-circuit line set; judging whether a power plant with a power generation level lower than a set threshold value in the single-circuit line set belongs to a ring network structure, wherein the ring network structure is formed by connecting power grids in the power grids; and if so, disconnecting the single-circuit line corresponding to the power plant with the power generation level lower than the set threshold value in the single-circuit line set.
Optionally, controlling the short-circuit current based on a connection mode of the power transmission lines between the power plants further includes: acquiring a double-circuit line in the double-circuit line set; a series reactor is connected to the double-circuit line; controlling line parameters of the double-circuit line by using the series reactor, wherein the line parameters comprise: voltage, current, and power; and controlling the short-circuit current based on the control of the series reactor on the double circuit line.
According to another aspect of the embodiments of the present invention, there is also provided a short-circuit current control apparatus including: the determining unit is used for determining a power grid to be accessed to an extra-high voltage area; the acquisition unit is used for acquiring the connection mode of the transmission lines among the power plants in the power grid, wherein the connection mode of the transmission lines among the power plants in the power grid comprises the following steps: single-circuit lines and double-circuit lines; and the control unit is used for controlling the short-circuit current based on the connection mode of the power transmission lines between the power plants.
Optionally, the obtaining unit includes: the first judgment module is used for judging the connection mode of the power transmission lines between the power plants; the classification module is used for classifying the power plant based on the judgment result to obtain a classification result, wherein the classification result comprises: a single-loop line set and a double-loop line set, the single-loop line set including: the connection mode of the power transmission lines between the power plants is a single-circuit line, and the double-circuit line set comprises: the connection mode of the power transmission lines between the power plants is a double-circuit line; and the first acquisition module is used for acquiring the connection mode of the power transmission lines among the power plants in the power grid based on the classification result.
Optionally, the control unit comprises: the determining module is used for determining a power plant with a power generation level lower than a set threshold value in the single-circuit line set; the second judgment module is used for judging whether a power plant with the power generation level lower than a set threshold value in the single-circuit line set belongs to a ring network structure, wherein the ring network structure is formed by interconnection of power grids in the power grids; and the disconnection module is used for disconnecting the single circuit line corresponding to the power plant with the power generation level lower than the set threshold value in the single circuit line set under the condition that the judgment result is yes.
Optionally, the control unit further comprises: the second acquisition module is used for acquiring the double-circuit lines in the double-circuit line set; the access module is used for accessing a series reactor on the double-circuit line; a first control module configured to control a line parameter of the double-circuit line using the series reactor, wherein the line parameter includes: voltage, current, and power; and the second control module is used for controlling the short-circuit current based on the control of the series reactor on the double-circuit line.
According to an aspect of an embodiment of the present invention, there is provided a storage medium including a stored program, wherein the program executes the short-circuit current control method of any one of the above.
According to an aspect of the embodiments of the present invention, there is provided a processor for executing a program, wherein the program executes the short-circuit current control method according to any one of the above.
In the embodiment of the present invention, the connection mode of the transmission lines between the electric fields in the power grid may be obtained by determining the power grid to be connected to the extra-high voltage region, where the connection mode of the transmission lines between the power plants in the power grid may include: the short-circuit current is controlled based on the connection mode of the power transmission lines between power plants, so that the access of extra-high voltage in an extra-high voltage area to be accessed is effectively reduced, the connection of a power grid is tighter, the value that the short-circuit current level in the extra-high voltage area exceeds the standard is caused to be accessed, the purpose of controlling the tightness degree of the power grid in the extra-high voltage area to be accessed is realized, the effect of controlling the short-circuit current exceeding index of the extra-high voltage area to be accessed is achieved, the technical problem that the current level exceeds the standard due to the fact that the power grid is tightly connected due to the access of extra-high voltage in the related technology is solved, and the user experience is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a flow chart of a short circuit current control method according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a short circuit current control apparatus according to an embodiment of the present invention;
FIG. 3 is a preferred schematic diagram of a short circuit current control apparatus according to an embodiment of the present invention;
FIG. 4 is a preferred schematic diagram of a short circuit current control apparatus according to yet another embodiment of the present invention;
fig. 5 is a preferred schematic diagram of another short-circuit current control device according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
For convenience of description, some terms or data appearing in the present invention are explained below:
a series reactor: the harmonic suppression circuit is generally connected with a capacitor bank or an intensive capacitor in series, suppresses higher harmonics, limits switching-on inrush current, and prevents harmonic from excessively amplifying power grid harmonics and generating resonance.
In accordance with an embodiment of the present invention, there is provided a method embodiment of a short circuit current control method, it should be noted that the steps illustrated in the flowchart of the accompanying drawings may be performed in a computer system, such as a set of computer executable instructions, and that while a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than that presented herein.
Fig. 1 is a flowchart of a short-circuit current control method according to an embodiment of the present invention, as shown in fig. 1, the short-circuit current control method includes the steps of:
and S102, determining a power grid to be accessed to an extra-high voltage area.
Step S104, obtaining the connection mode of the transmission lines among the power plants in the power grid, wherein the connection mode of the transmission lines among the power plants in the power grid comprises the following steps: single circuit line, double circuit line.
And S106, controlling short-circuit current based on the connection mode of the power transmission lines between the power plants.
Through the steps, the power grid to be connected into the extra-high voltage area can be determined, and the connection mode of the power transmission lines between the electric fields in the power grid is obtained, wherein the connection mode of the power transmission lines between the power plants in the power grid can include: the short-circuit current is controlled based on the connection mode of the power transmission lines between power plants, so that the access of extra-high voltage in an extra-high voltage area to be accessed is effectively reduced, the connection of a power grid is tighter, the value that the short-circuit current level in the extra-high voltage area exceeds the standard is caused to be accessed, the purpose of controlling the tightness degree of the power grid in the extra-high voltage area to be accessed is realized, the effect of controlling the short-circuit current exceeding index of the extra-high voltage area to be accessed is achieved, the technical problem that the current level exceeds the standard due to the fact that the power grid is tightly connected due to the access of extra-high voltage in the related technology is solved, and the user experience is improved.
In the above steps S102 to S106, the problem of the exceeding of the short-circuit current is controlled based on the connection mode of the power transmission line between the power plants by studying the connection mode of the power transmission line between the power grids to be connected to the extra-high voltage region, so that the power grid to be connected to the extra-high voltage region can be ensured to be operated safely and stably after being connected to the extra-high voltage region.
The control of the problem that the short-circuit current exceeds the standard can be started from two aspects of changing the structure of a power grid and changing the line parameters of a transmission line accessed to an extra-high voltage area, and two modes of account checking are respectively explained in detail by combining with a specific embodiment.
In one aspect, the control of the short-circuit current value can be realized by changing the structure of the power grid, the connection mode of the power transmission lines between the power plants in the power grid is acquired, the connection mode between each power plant and other power plants in the power grid needs to be judged, and then, the connection mode of the power transmission lines between the power plants in the power grid can include: judging the connection mode of the power transmission lines between the power plants; classifying the power plant based on the judgment result, and obtaining a classification result, wherein the classification result may include: the single-circuit line set and the double-circuit line set, the single-circuit line set includes: the connected mode of the transmission line between the power plants is a single-circuit line, and the double-circuit line set comprises: the connection mode of the power transmission lines between the power plants is a double-circuit line; and acquiring the connection mode of the power transmission lines among the power plants in the power grid based on the classification result.
Wherein, controlling the short-circuit current based on the connection mode of the power transmission lines between the power plants may include: determining a power plant with a power generation level lower than a set threshold value in the single-circuit line set; judging whether a power plant with a power generation level lower than a set threshold value in the single-circuit line set belongs to a ring network structure, wherein the ring network structure is formed by connecting all power grids in the power grids; and if the judgment result is yes, disconnecting the single circuit line corresponding to the power plant with the power generation level lower than the set threshold value in the single circuit line set. For example, if there are many power plants in the power grid to be connected to the extra-high voltage area, and if the power plant 1 is connected to the power plant 3, the connection between the power plant 1 and other power plants in the power grid is a single-circuit line, and the power plant 1 also belongs to a ring network structure formed by several power plants in the power grid, further, the power generation level of the power plant 1 is lower than that of other power plants, so that the power plant 1 can provide relatively small power for the power grid, and by combining the above factors, the power transmission line between the power plant 1 and the power plant 3 can be considered, and the power transmission line between the power plants connected thereto can be adopted for other power plants in the power grid structure which satisfy the same conditions as the power plant 1, the purpose of controlling the index of the over-standard short-circuit current can be achieved by changing the structure of the power grid to a certain extent, and therefore the safe and stable operation of the power grid connected into an extra-high voltage area can be guaranteed.
In another aspect, the control of the exceeding value of the short-circuit current may be performed by changing line parameters of the transmission line connected to the extra-high voltage region, and the control of the short-circuit current based on the connection mode of the transmission line between the power plants may further include: acquiring a double-circuit line in a double-circuit line set; a series reactor is connected to the double-circuit line; controlling line parameters of the double-circuit line by using the series reactor, wherein the line parameters comprise: voltage, current, and power; and controlling the short-circuit current based on the control of the series reactor on the double-circuit line. For example, the connection mode of the transmission lines between the power plant 3 and the power plant 5 in the power grid is a double-circuit line, so that a series reactor may be connected between the power plant 3 and the power plant 5, and when a short circuit occurs between the power plant 3 and the power plant 5 in the power grid, the short-circuit current may be reduced through the series reactor, so as to achieve a value that controls the short-circuit current connected to the extra-high voltage region to exceed the standard, so that the short-circuit current is within a safe range, specifically, the short-circuit current may be reduced from 64kA to 61kA, and further meet the requirement of safe and stable operation of the power grid.
In this preferred embodiment, a short-circuit current control device is further provided, and it should be noted that the short-circuit current control device in this embodiment of the present application may be used to execute the method for short-circuit current control provided in this embodiment of the present application. The following describes a short-circuit current control device provided in an embodiment of the present application.
Fig. 2 is a schematic diagram of a short-circuit current control apparatus according to an embodiment of the present invention, as shown in fig. 2, including: a determining unit 21, an acquiring unit 23 and a control unit 25. The short-circuit current control device will be described in detail below.
The determining unit 21 is configured to determine a power grid to be connected to an extra-high voltage area.
An obtaining unit 23, connected to the determining unit 21, configured to obtain a connection manner of power transmission lines between power plants in the power grid, where the connection manner of the power transmission lines between the power plants in the power grid includes: single circuit line, double circuit line.
And the control unit 25 is connected with the acquisition unit 23 and is used for controlling the short-circuit current based on the connection mode of the power transmission lines between the power plants.
According to the electromagnetic ultrasonic sensor control device provided by the embodiment of the invention, the power grid to be accessed to the extra-high voltage area is determined through the determining unit 21; the obtaining unit 23 obtains a connection mode of the transmission lines between the power plants in the power grid, where the connection mode of the transmission lines between the power plants in the power grid includes: single-circuit lines and double-circuit lines; the control unit 25 controls the short-circuit current based on the connection of the transmission lines between the power plants. The effect of controlling the over-standard index of the short circuit current to be connected into the extra-high voltage area is achieved, the technical problem that the current level exceeds the standard due to the fact that the power grid is connected tightly due to the fact that extra-high voltage is connected in the related technology is solved, and user experience is improved.
Fig. 3 is a preferred schematic diagram of a short-circuit current control device according to an embodiment of the present invention, and as shown in fig. 3, the short-circuit current control device includes an obtaining unit 23: a first determining module 31, a classifying module 33 and a first obtaining module 35. The acquisition unit 23 in the short-circuit current control device will be described in detail below.
And the first judging module 31 is used for judging the connection mode of the power transmission lines between the power plants.
The classification module 33, together with the first determination module 31, is configured to classify the power plant based on the determination result, and obtain a classification result, where the classification result includes: the single-circuit line set and the double-circuit line set, the single-circuit line set includes: the connected mode of the transmission line between the power plants is a single-circuit line, and the double-circuit line set comprises: the connection mode of the transmission lines between the power plants is a double-circuit line.
And the first obtaining module 35 is connected with the classifying module 33 and is used for obtaining the connection mode of the power transmission lines between the power plants in the power grid based on the classification result.
Fig. 4 is a preferred schematic diagram of a short-circuit current control device according to an embodiment of the present invention, and as shown in fig. 4, a control unit 25 in the short-circuit current control device includes: a determination module 41, a second decision module 43 and a disconnection module 45. The control unit 25 in the short-circuit current control device will be described in detail below.
And the determining module 41 is used for determining the power plants in the single-circuit line set, wherein the power generation level of the power plants is lower than a set threshold value.
And a second judging module 43, connected to the determining module 41, for judging whether the power plant with the power generation level lower than the set threshold in the single-circuit line set belongs to a ring network structure, where the ring network structure is formed by connecting each power grid in the power grids.
And a disconnection module 45, connected to the second determination module 43, for disconnecting, if the determination result is yes, the single circuit line corresponding to the power plant with the power generation level lower than the set threshold in the single circuit line set.
Fig. 5 is a preferred schematic diagram of a short-circuit current control device according to an embodiment of the present invention, and as shown in fig. 5, the control unit 25 in the short-circuit current control device further includes: a second acquisition module 51, an access module 53, a first control module 55 and a second control module 57. Next, the control unit 25 in the short-circuit current control device will be further described.
And a second obtaining module 51, configured to obtain a double-circuit line in the double-circuit line set.
And an access module 53, which is connected to the second obtaining module 51, and is configured to access a series reactor on the double-circuit line.
A first control module 55, connected to the access module 53, for controlling a line parameter of the double-circuit line by using a series reactor, wherein the line parameter includes: voltage, current, and power.
And a second control module 57, connected to the first control module 55, for controlling the short-circuit current based on the control of the series reactor on the double-circuit line.
According to an aspect of an embodiment of the present invention, there is provided a storage medium including a stored program, wherein the program executes any one of the above-described short-circuit current control methods.
According to an aspect of the embodiments of the present invention, there is provided a processor for executing a program, wherein the program executes any one of the above short-circuit current control methods.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware, and also can be implemented in the form of software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A short circuit current control method, comprising:
determining a power grid to be accessed to an extra-high voltage area;
acquiring the connection mode of the transmission lines among the power plants in the power grid, wherein the connection mode of the transmission lines among the power plants in the power grid comprises the following steps: single-circuit lines and double-circuit lines;
controlling short-circuit current based on the connection mode of the power transmission lines between the power plants;
wherein, obtaining the connection mode of the power transmission lines between the power plants in the power grid comprises:
judging the connection mode of the power transmission lines among the power plants;
classifying the power plant based on the judgment result to obtain a classification result, wherein the classification result comprises: a single-loop line set and a double-loop line set, the single-loop line set including: the connection mode of the power transmission lines between the power plants is a single-circuit line, and the double-circuit line set comprises: the connection mode of the power transmission lines between the power plants is a double-circuit line;
acquiring a connection mode of the power transmission lines among the power plants in the power grid based on the classification result;
wherein controlling the short-circuit current based on a connection mode of the power transmission lines between the power plants comprises:
determining a power plant with a power generation level lower than a set threshold value in the single-circuit line set;
judging whether a power plant with a power generation level lower than a set threshold value in the single-circuit line set belongs to a ring network structure, wherein the ring network structure is formed by connecting power grids in the power grids;
and if so, disconnecting the single-circuit line corresponding to the power plant with the power generation level lower than the set threshold value in the single-circuit line set.
2. The method of claim 1, wherein controlling the short circuit current based on a manner of connection of transmission lines between the power plants further comprises:
acquiring a double-circuit line in the double-circuit line set;
a series reactor is connected to the double-circuit line;
controlling line parameters of the double-circuit line by using the series reactor, wherein the line parameters comprise: voltage, current, and power;
and controlling the short-circuit current based on the control of the series reactor on the double circuit line.
3. A short circuit current control device, comprising:
the determining unit is used for determining a power grid to be accessed to an extra-high voltage area;
the acquisition unit is used for acquiring the connection mode of the transmission lines among the power plants in the power grid, wherein the connection mode of the transmission lines among the power plants in the power grid comprises the following steps: single-circuit lines and double-circuit lines;
the control unit is used for controlling short-circuit current based on the connection mode of the power transmission lines between the power plants;
wherein the acquisition unit includes:
the first judgment module is used for judging the connection mode of the power transmission lines between the power plants;
the classification module is used for classifying the power plant based on the judgment result to obtain a classification result, wherein the classification result comprises: a single-loop line set and a double-loop line set, the single-loop line set including: the connection mode of the power transmission lines between the power plants is a single-circuit line, and the double-circuit line set comprises: the connection mode of the power transmission lines between the power plants is a double-circuit line;
the first obtaining module is used for obtaining the connection mode of the power transmission lines among the power plants in the power grid based on the classification result;
wherein the control unit includes:
the determining module is used for determining a power plant with a power generation level lower than a set threshold value in the single-circuit line set;
the second judgment module is used for judging whether a power plant with the power generation level lower than a set threshold value in the single-circuit line set belongs to a ring network structure, wherein the ring network structure is formed by interconnection of power grids in the power grids;
and the disconnection module is used for disconnecting the single circuit line corresponding to the power plant with the power generation level lower than the set threshold value in the single circuit line set under the condition that the judgment result is yes.
4. The apparatus of claim 3, wherein the control unit further comprises:
the second acquisition module is used for acquiring the double-circuit lines in the double-circuit line set;
the access module is used for accessing a series reactor on the double-circuit line;
a first control module configured to control a line parameter of the double-circuit line using the series reactor, wherein the line parameter includes: voltage, current, and power;
and the second control module is used for controlling the short-circuit current based on the control of the series reactor on the double-circuit line.
5. A storage medium characterized by comprising a stored program, wherein the program executes the short-circuit current control method according to any one of claims 1 to 2.
6. A processor, characterized in that the processor is configured to run a program, wherein the program is configured to execute the short-circuit current control method according to any one of claims 1 to 2 when running.
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US6737837B1 (en) * | 2002-11-25 | 2004-05-18 | Abb Ab | Device and a method for control of power flow in a transmission line |
CN105846422A (en) * | 2015-01-13 | 2016-08-10 | 国家电网公司 | Large-capacity power gird short-circuit current control measure optimization configuration method |
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US6737837B1 (en) * | 2002-11-25 | 2004-05-18 | Abb Ab | Device and a method for control of power flow in a transmission line |
CN105846422A (en) * | 2015-01-13 | 2016-08-10 | 国家电网公司 | Large-capacity power gird short-circuit current control measure optimization configuration method |
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