CN113783220A - Full-band resonance suppression passive device and method for flexible direct current and storage medium - Google Patents
Full-band resonance suppression passive device and method for flexible direct current and storage medium Download PDFInfo
- Publication number
- CN113783220A CN113783220A CN202111105137.XA CN202111105137A CN113783220A CN 113783220 A CN113783220 A CN 113783220A CN 202111105137 A CN202111105137 A CN 202111105137A CN 113783220 A CN113783220 A CN 113783220A
- Authority
- CN
- China
- Prior art keywords
- full
- parallel
- passive device
- band resonance
- resonance suppression
- 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
- 230000001629 suppression Effects 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 43
- 239000003990 capacitor Substances 0.000 claims description 29
- 238000013016 damping Methods 0.000 claims description 19
- 239000002131 composite material Substances 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 25
- 238000010586 diagram Methods 0.000 description 16
- 238000013461 design Methods 0.000 description 12
- 238000004590 computer program Methods 0.000 description 11
- 238000004891 communication Methods 0.000 description 8
- 230000010355 oscillation Effects 0.000 description 7
- 230000006870 function Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 238000010187 selection method Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000036961 partial effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 238000004088 simulation Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
- H02J2003/365—Reducing harmonics or oscillations in HVDC
-
- 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
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
- Filters And Equalizers (AREA)
Abstract
The invention relates to a full-band resonance suppression passive device, a method and a storage medium for flexible direct current, wherein the full-band resonance suppression passive device comprises the following components: setting a feasible topological structure of the full-band resonance suppression passive device; and connecting the full-band resonance suppression passive device in parallel to an alternating current bus of a sending end converter or a receiving end converter of the flexible direct current system. The invention can effectively inhibit the full-band resonance risk of the flexible direct current system and efficiently and conveniently solve the full-band resonance problem of the flexible direct current system. The invention can be widely applied to the technical field of flexible direct current resonance suppression.
Description
Technical Field
The invention relates to the technical field of flexible direct current resonance suppression, in particular to a full-band resonance suppression passive device and method for flexible direct current and a storage medium.
Background
The flexible direct current transmission system is constructed by a large number of power electronic elements, the control characteristics and the operation state are complex, negative damping is possibly presented due to the influence of factors such as control delay and control parameters, and the oscillation risk between the flexible direct current system and a large-scale new energy field station and between the flexible direct current system and an access alternating current system is high.
The existing common resonance suppression method for the flexible direct current system optimizes the impedance characteristic of the flexible direct current converter by means of adjusting control delay and control parameters of the flexible direct current system and the like, but the method is limited by the hardware capability of a control device, the response characteristic requirements of the flexible direct current system and the like, the suppression degree and the suppression effect are limited, and particularly the suppression effect on high-frequency resonance is weak. In addition, the scheme belongs to a post-remediation suppression scheme, and is used for performing targeted suppression after a specific frequency band resonance phenomenon occurs in the field debugging stage of the flexible-direct system, so that the realization process is complex, the consumed time is long, and the debugging working period of the flexible-direct system is greatly influenced.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a passive device, a method and a storage medium for suppressing full-band resonance in a flexible dc system, which can effectively suppress the risk of full-band resonance in the flexible dc system, and efficiently and conveniently solve the problem of full-band resonance in the flexible dc system.
In order to achieve the purpose, the invention adopts the following technical scheme: a method for setting a full-band resonance suppression passive device for flexible direct current comprises the following steps: setting a feasible topological structure of the full-band resonance suppression passive device; and connecting the full-band resonance suppression passive device in parallel to an alternating current bus of a sending end converter or a receiving end converter of the flexible direct current system.
Preferably, the impedance of the full-band resonance suppression passive device is connected in parallel with the ac outlet impedance of the transmitting-side converter or the receiving-side converter of the flexible dc system, so that the ac outlet impedance frequency characteristic of the transmitting-side converter or the receiving-side converter of the flexible dc system exhibits positive damping.
Preferably, the feasible topology of the full-band resonance suppression passive device includes: the parallel loop is formed by connecting a first capacitor C1 and a first reactance L1 in parallel; a first resistor R1, one end of which is connected to one end of the parallel loop, and the other end of the first resistor R1 is grounded; the other end of the parallel loop is connected to the alternating current bus.
Preferably, the feasible topology of the full-band resonance suppression passive device includes: a parallel loop formed by connecting a first reactance L1 and a first resistor R1 in parallel; a first capacitor C1, one end of which is connected to one end of the parallel circuit, and the other end of the first capacitor C1 is connected to the ac bus; the other end of the parallel loop is grounded.
Preferably, the feasible topology of the full-band resonance suppression passive device includes: the first parallel loop is formed by connecting a first reactance L1 and a composite branch in parallel; the first capacitor C1, one end of which is connected to one end of the first parallel loop, and the other end of the first capacitor C1 is connected to the ac bus; the other end of the parallel loop is grounded.
Preferably, the compound branch comprises: the second parallel loop is formed by connecting a second reactance L2 and a second capacitor C2 in parallel; a first resistor R1, one end of which is connected to the second parallel loop, and the other end of the first resistor R1 is connected in parallel with one end of the first reactance L1 and then grounded; the other end of the second parallel loop is connected in parallel with the other end of the first reactance L1 and then connected with one end of the first capacitor C1.
Preferably, the impedance of the full-band resonance suppression passive device is approximately equivalent to a first resistor R1, and the first resistor R1 satisfies the following conditions:
in the formula, Rv is the original soft dc converter ac outlet negative damping, w is the angular velocity, and Lv is the original soft dc converter ac outlet inductance.
A flexible DC suppresses passive device with full band resonance, it includes: the device comprises a topological structure setting module and a connecting module; the topological structure setting module is used for setting a feasible topological structure of the full-band resonance suppression passive device; and the connecting module is used for connecting the full-band resonance suppression passive device in parallel to an alternating current bus of a sending end converter or a receiving end converter of the flexible direct current system.
A computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a computing device, cause the computing device to perform any of the above methods.
A computing device, comprising: one or more processors, memory, and one or more programs stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for performing any of the above-described methods.
Due to the adoption of the technical scheme, the invention has the following advantages:
1. the invention can effectively introduce positive damping to the AC outlet of the soft DC converter, greatly improve the full-band impedance frequency characteristic of the soft DC converter, efficiently and conveniently inhibit the full-band resonance risk of the soft DC converter, and has huge practical value and wide application prospect.
2. Under the condition of normal operation, the invention basically does not influence the operation characteristics of the system and has smaller reactive power exchange and active power consumption.
3. The device has high reliability and economy and meets the requirements of light weight/compactness.
Drawings
Fig. 1 is a schematic overall view of a method for disposing a full-band resonance suppression passive device for flexible dc according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating an installation position of a full-band resonance suppression passive device for a flexible direct-current power transmission system according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a parallel connection between a high-frequency equivalent impedance and a soft dc converter equivalent impedance in a full-band resonance suppression passive device for a flexible dc power transmission system according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a first topology of a full-band resonance suppression passive device for a flexible direct-current power transmission system according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a second topology of a full-band resonance suppression passive device for a flexible direct-current power transmission system according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a third topology of a full-band resonance suppression passive device for a flexible direct-current power transmission system according to an embodiment of the present invention;
fig. 7 is an impedance amplitude-frequency and phase-frequency characteristic curve of a first topology of a full-band resonance suppression passive device for a flexible direct-current power transmission system according to an embodiment of the present invention under typical design parameters;
fig. 8 is an impedance amplitude-frequency and phase-frequency characteristic curve of a second topology of a full-band resonance suppression passive device for a flexible direct-current power transmission system according to an embodiment of the present invention under typical design parameters;
fig. 9 is an impedance amplitude-frequency and phase-frequency characteristic curve of a third topology of the full-band resonance suppression passive device for the flexible direct-current power transmission system according to an embodiment of the present invention under typical design parameters;
fig. 10 is an impedance amplitude-frequency and phase-frequency characteristic curve before and after a first topology of a full-band resonance suppression passive device for a flexible direct-current power transmission system according to an exemplary embodiment of the present invention, where exemplary design parameters are introduced;
fig. 11 is an impedance amplitude-frequency and phase-frequency characteristic curve before and after a second topology of a full-band resonance suppression passive device for a flexible direct-current power transmission system according to an exemplary embodiment of the present invention, where exemplary design parameters are introduced;
fig. 12 is an impedance amplitude-frequency and phase-frequency characteristic curve before and after a third topology of a full-band resonance suppression passive device for a flexible direct-current power transmission system according to an exemplary embodiment of the present invention, where exemplary design parameters are introduced;
fig. 13 is a time domain simulation waveform of the ac bus voltage of the converter before and after the converter is put into the full-band resonance suppression passive device for the hvdc transmission system in an exemplary embodiment of the present invention;
FIG. 14 is a schematic diagram of a computing device in an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In order to efficiently and conveniently solve the full-band resonance problem of a flexible direct current system, based on a preposed active suppression idea, the invention provides a passive device, a method and a storage medium for suppressing full-band resonance for a flexible direct current, wherein the passive device is arranged on an alternating current bus of a converter of the flexible direct current system in parallel, the full-band impedance frequency characteristic of the flexible direct current converter is effectively improved by introducing positive damping to an alternating current outlet of the flexible direct current converter, and the full-band impedance phase-angle difference between the flexible direct current system and a large-scale new energy field station or between the flexible direct current system and an access alternating current system is prevented from exceeding 180 degrees, so that the full-band resonance problem of the flexible direct current system is efficiently and conveniently solved.
In an embodiment of the present invention, as shown in fig. 1, a method for setting a full-band resonance suppression passive device for flexible direct current is provided, where the method includes the following steps:
1) setting a feasible topological structure of the full-band resonance suppression passive device;
2) the full-band resonance suppression passive device is connected in parallel to an ac bus of a transmitting-end converter or a receiving-end converter of the flexible dc system, as shown in fig. 2.
In the above embodiment, the impedance of the full-band resonance suppression passive device is connected in parallel with the ac outlet impedance of the transmitting-side converter or the receiving-side converter of the flexible dc system, so that the ac outlet impedance frequency characteristic of the transmitting-side converter or the receiving-side converter of the flexible dc system exhibits positive damping.
As shown in fig. 3, the impedance of the full-band resonance suppression passive device of the present invention at medium-high frequency is approximately equivalent to a first resistor R1, and is connected in parallel with the impedance-Rv + jwLv of a soft dc converter (i.e., a sending-end converter or a receiving-end converter of a flexible dc system, hereinafter referred to as a soft dc converter), so that the ac outlet impedance frequency characteristic of the soft dc converter presents positive damping, and the full-band impedance phase angle difference between the flexible dc system and a large-scale new energy field station or between the flexible dc system and an access ac system is prevented from exceeding 180 °, thereby effectively suppressing the full-band resonance risk. Wherein Rv is the original soft DC converter AC outlet negative damping, w is the angular velocity, and Lv is the original soft DC converter AC outlet inductance.
In the above embodiments, the feasible topology of the full-band resonance suppression passive device may adopt any one of the following three structures:
the first method comprises the following steps: as shown in fig. 4, a possible topology of the full-band resonance suppression passive device includes:
the parallel loop is formed by connecting a first capacitor C1 and a first reactance L1 in parallel;
a first resistor R1, one end of which is connected to one end of the parallel circuit, and the other end of the first resistor R1 is grounded;
the other end of the parallel loop is connected to the AC bus.
When the system is used, the structure is simplified, active power consumption is avoided under fundamental frequency, reactive power exchange with the system is avoided, and the operation characteristics of the system are not influenced.
And the second method comprises the following steps: as shown in fig. 5, a possible topology of the full-band resonance suppression passive device includes:
a parallel loop formed by connecting a first reactance L1 and a first resistor R1 in parallel;
one end of the first capacitor C1 is connected with one end of the parallel loop, and the other end of the first capacitor C1 is connected with the alternating current bus;
the other end of the parallel loop is grounded.
When the device is used, the structure is simplified, the end-to-end insulation level of the first reactance L1 is low, and the device manufacturing difficulty is avoided.
And the third is that: as shown in fig. 6, a feasible topology of the full-band resonance suppression passive device includes:
the first parallel loop is formed by connecting a first reactance L1 and a composite branch in parallel;
a first capacitor C1, one end of which is connected to one end of the first parallel circuit, and the other end of the first capacitor C1 is connected to the ac bus;
the other end of the parallel loop is grounded.
Wherein, compound branch road includes:
the second parallel loop is formed by connecting a second reactance L2 and a second capacitor C2 in parallel;
a first resistor R1, one end of which is connected to the second parallel loop, and the other end of the first resistor R1 is connected in parallel with one end of the first reactance L1 and then grounded;
the other end of the second parallel loop is connected in parallel with the other end of the first reactance L1 and then connected with one end of the first capacitor C1.
When the three-phase reactance-type three-phase converter is used, the insulation level between the ends of the first reactance L1 and the second reactance L2 in the third structure is small, equipment manufacturing difficulty is avoided, and active power consumption is avoided at fundamental frequency.
The three structures can play a role in effectively inhibiting the flexible direct current full-frequency band resonance risk, and the comprehensive performance of the third structure is optimal.
The parameter design method in the three structures is as follows:
1) for the first configuration:
at the fundamental frequency, by introducing the parallel resonance of the first capacitor C1 and the first reactance L1, the fundamental frequency current flowing into the first resistor R1 is blocked, and the first resistor R1 is ensured to have no fundamental frequency loss. At medium and high frequencies, the first capacitor C1 and the first reactance L1 are approximately equivalent to a short circuit and an open circuit, and the impedance of the full-band resonance suppression passive device is approximately equivalent to a first resistor R1. In order to ensure that the flexible-direct current converter and the full-band resonance suppression passive device have larger positive damping output after being connected in parallel, the value of the first resistor R1 needs to be comprehensively matched with negative damping which can occur under different frequencies. If the ac outlet impedance of the original soft dc converter is-Rv + jwLv, the selected value of the first resistor R1 should satisfy the following calculation formula at different medium and high frequencies:
Re[R1//(-Rv+jwLv)]≥0
the method is simplified and can be obtained:
2) for the second configuration:
at the fundamental frequency, the impedance between the ends of the parallel loop is maintained at a small value by connecting the small first reactance L1 with the first resistor R1 in parallel, and the fundamental frequency voltage is mainly borne by the first capacitor C1, so that the fundamental frequency loss of the first resistor R1 is reduced. At medium and high frequencies, the first capacitor C1 and the first reactance L1 are approximately equivalent to a short circuit and an open circuit, and the impedance of the full-band resonance suppression passive device is approximately equivalent to a first resistor R1. The value selection method of the first resistor R1 is the same as the value selection method of the first resistor R1 in the first topology.
3) For the third configuration:
at fundamental frequency, the impedance between the ends of the parallel loop is maintained at a small value by connecting the small first reactance L1 with the composite branch in parallel, and the fundamental frequency voltage is mainly born by the first capacitor C1, so that the insulation level of the composite branch is reduced; meanwhile, by introducing the fundamental frequency parallel resonance of the second capacitor C2 and the second reactance L2, the fundamental frequency current flowing into the first resistor R1 is blocked, and the resistor R1 is ensured to have no fundamental frequency loss. At medium and high frequencies, the first capacitor C1 and the second capacitor C2 are approximately equivalent to a short circuit, the first reactance L1 and the second reactance L2 are approximately equivalent to an open circuit, and the impedance of the device is approximately equivalent to the first resistor R1. The value selection method of the first resistor R1 is the same as the value selection method of the first resistor R1 in the first topology.
In use, as shown in fig. 7, in the method for setting the full-band resonance suppression passive device for the flexible direct-current transmission system, the impedance of the first topology of the full-band resonance suppression passive device under typical design parameters approximately exhibits pure resistance characteristics at medium and high frequencies.
As shown in fig. 8, in the method for installing the full-band resonance suppression passive device for the flexible direct-current transmission system according to the present invention, the impedance of the second topology of the full-band resonance suppression passive device under typical design parameters approximately exhibits pure resistance characteristics at medium and high frequencies.
As shown in fig. 9, in the method for setting a full-band resonance suppression passive device for a flexible direct-current transmission system according to the present invention, the impedance of the third topology of the full-band resonance suppression passive device under typical design parameters approximately exhibits pure resistance characteristics at medium-high frequencies.
As shown in fig. 10, the original impedance phase angle of the typical flexible direct current converter is greater than 90 ° in a partial frequency band, and exhibits a negative damping characteristic, and after the first topology structure of the full-band resonance suppression passive device for the flexible direct current transmission system under typical design parameters is introduced, the impedance phase angle is less than 90 ° in the full frequency band, and exhibits a positive damping characteristic, and the oscillation risk disappears.
As shown in fig. 11, the original impedance phase angle of the typical soft-dc converter is greater than 90 ° in a partial frequency band, and exhibits a negative damping characteristic, and after the second topology structure of the full-band resonance suppression passive device is introduced, the impedance phase angle is less than 90 ° in the full frequency band, and exhibits a positive damping characteristic, and the oscillation risk disappears.
As shown in fig. 12, the original impedance phase angle of the typical flexible direct current converter is greater than 90 ° in a partial frequency band, and exhibits a negative damping characteristic, and after the third topology structure of the full-band resonance suppression passive device for the flexible direct current transmission system under typical design parameters is introduced, the impedance phase angle is less than 90 ° in the full frequency band, and exhibits a positive damping characteristic, and the oscillation risk disappears.
Example (b):
to further demonstrate the effectiveness and feasibility of the present invention, the invention is further illustrated by the following examples:
a typical flexible direct-current power transmission system model and a model of a third topological structure of a full-band resonance suppression passive device for the flexible direct-current power transmission system are built in power system transient simulation software PSCAD/EMTDC, and time domain simulation comparative analysis before and after the model is put into the full-band resonance suppression passive device for the flexible direct-current power transmission system is carried out.
As shown in fig. 13, the ac bus voltage of the converter of the flexible dc power transmission system before 3s has a 600Hz oscillation phenomenon, and the full-band resonance suppression passive device for the flexible dc power transmission system is put into the converter at the time of 3s, so that the voltage oscillation amplitude is gradually reduced, and the oscillation about 50ms completely disappears, thereby effectively verifying the resonance suppression capability of the full-band resonance suppression passive device for the flexible dc power transmission system.
The embodiment shows that the setting method of the full-band resonance suppression passive device for the flexible direct-current transmission system can effectively introduce positive damping to the alternating-current outlet of the flexible direct-current converter, greatly improves the full-band impedance frequency characteristic of the flexible direct-current converter, efficiently and conveniently suppresses the full-band resonance risk of the flexible direct-current converter, and has huge practical value and wide application prospect.
In one embodiment of the invention, a full-band resonance suppression passive device for flexible direct current is provided, which comprises a topology structure setting module and a connection module;
the topological structure setting module is used for setting a feasible topological structure of the full-band resonance suppression passive device;
and the connecting module is used for connecting the full-band resonance suppression passive device in parallel to an alternating current bus of a sending end converter or a receiving end converter of the flexible direct current system.
The system provided in this embodiment is used for executing the above method embodiments, and for details of the process and the details, reference is made to the above embodiments, which are not described herein again.
As shown in fig. 14, which is a schematic structural diagram of a computing device provided in an embodiment of the present invention, the computing device may be a terminal, and may include: a processor (processor), a communication Interface (communication Interface), a memory (memory), a display screen and an input device. The processor, the communication interface and the memory are communicated with each other through a communication bus. The processor is used to provide computing and control capabilities. The memory includes a non-volatile storage medium, an internal memory, the non-volatile storage medium storing an operating system and a computer program that when executed by a processor implements a setup method; the internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The communication interface is used for carrying out wired or wireless communication with an external terminal, and the wireless communication can be realized through WIFI, a manager network, NFC (near field communication) or other technologies. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on a shell of the computing equipment, an external keyboard, a touch pad or a mouse and the like. The processor may call logic instructions in the memory to implement the functions of the following method:
setting a feasible topological structure of the full-band resonance suppression passive device; and connecting the full-band resonance suppression passive device in parallel to an alternating current bus of a transmitting end converter or a receiving end converter of the flexible direct current system.
In addition, the logic instructions in the memory may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand-alone product. 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 removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Those skilled in the art will appreciate that the architecture shown in fig. 14 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects may be applied, and that a particular computing device may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment of the invention, a computer program product is provided, the computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions that, when executed by a computer, enable the computer to perform the methods provided by the above-described method embodiments, for example, comprising: setting a feasible topological structure of the full-band resonance suppression passive device; and connecting the full-band resonance suppression passive device in parallel to an alternating current bus of a transmitting end converter or a receiving end converter of the flexible direct current system.
In one embodiment of the invention, a non-transitory computer-readable storage medium is provided that stores server instructions that cause a computer to perform the methods provided by the embodiments described above.
The implementation principle and technical effect of the computer-readable storage medium provided by the above embodiments are similar to those of the above method embodiments, and are not described herein again.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for setting a full-band resonance suppression passive device for flexible direct current is characterized by comprising the following steps:
setting a feasible topological structure of the full-band resonance suppression passive device;
and connecting the full-band resonance suppression passive device in parallel to an alternating current bus of a sending end converter or a receiving end converter of the flexible direct current system.
2. The setting method according to claim 1, wherein the impedance of the full-band resonance suppression passive device is connected in parallel with the ac outlet impedance of the transmitting-side converter or the receiving-side converter of the flexible dc system, so that the frequency characteristic of the ac outlet impedance of the transmitting-side converter or the receiving-side converter of the flexible dc system exhibits positive damping.
3. The method of claim 1, wherein the viable topology of the full-band resonance suppression passive device comprises:
the parallel loop is formed by connecting a first capacitor C1 and a first reactance L1 in parallel;
a first resistor R1, one end of which is connected to one end of the parallel loop, and the other end of the first resistor R1 is grounded;
the other end of the parallel loop is connected to the alternating current bus.
4. The method of claim 1, wherein the viable topology of the full-band resonance suppression passive device comprises:
a parallel loop formed by connecting a first reactance L1 and a first resistor R1 in parallel;
a first capacitor C1, one end of which is connected to one end of the parallel circuit, and the other end of the first capacitor C1 is connected to the ac bus;
the other end of the parallel loop is grounded.
5. The method of claim 1, wherein the viable topology of the full-band resonance suppression passive device comprises:
the first parallel loop is formed by connecting a first reactance L1 and a composite branch in parallel;
the first capacitor C1, one end of which is connected to one end of the first parallel loop, and the other end of the first capacitor C1 is connected to the ac bus;
the other end of the parallel loop is grounded.
6. The setup method of claim 5, wherein the compound branch comprises:
the second parallel loop is formed by connecting a second reactance L2 and a second capacitor C2 in parallel;
a first resistor R1, one end of which is connected to the second parallel loop, and the other end of the first resistor R1 is connected in parallel with one end of the first reactance L1 and then grounded;
the other end of the second parallel loop is connected in parallel with the other end of the first reactance L1 and then connected with one end of the first capacitor C1.
7. The method as set forth in any one of claims 3 to 6, wherein the impedance of the full-band resonance suppression passive device is approximately equivalent to a first resistor R1, and the first resistor R1 satisfies the following conditions:
in the formula, Rv is the original soft dc converter ac outlet negative damping, w is the angular velocity, and Lv is the original soft dc converter ac outlet inductance.
8. The utility model provides a flexible direct current suppresses passive device with full frequency channel resonance which characterized in that includes: the device comprises a topological structure setting module and a connecting module;
the topological structure setting module is used for setting a feasible topological structure of the full-band resonance suppression passive device;
and the connecting module is used for connecting the full-band resonance suppression passive device in parallel to an alternating current bus of a sending end converter or a receiving end converter of the flexible direct current system.
9. A computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a computing device, cause the computing device to perform any of the methods of claims 1-7.
10. A computing device, comprising: one or more processors, memory, and one or more programs stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for performing any of the methods of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111105137.XA CN113783220B (en) | 2021-09-22 | 2021-09-22 | Full-band resonance suppression passive device and method for flexible direct current and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111105137.XA CN113783220B (en) | 2021-09-22 | 2021-09-22 | Full-band resonance suppression passive device and method for flexible direct current and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113783220A true CN113783220A (en) | 2021-12-10 |
| CN113783220B CN113783220B (en) | 2024-05-03 |
Family
ID=78852448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111105137.XA Active CN113783220B (en) | 2021-09-22 | 2021-09-22 | Full-band resonance suppression passive device and method for flexible direct current and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113783220B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170140A (en) * | 2011-04-21 | 2011-08-31 | 中国电力科学研究院 | Method for starting flexible high-voltage direct-current (HVDC) system of modularized multi-level converter |
| CN105098779A (en) * | 2014-05-05 | 2015-11-25 | 长沙理工大学 | Resonance active inhibition method in flexible DC power transmission system |
| EP3179622A1 (en) * | 2015-12-08 | 2017-06-14 | ABB Technology AG | Resonant power converter |
| CN111200297A (en) * | 2020-02-03 | 2020-05-26 | 国家电网有限公司 | Amplitude and phase corrector selection method and system for improving impedance characteristics of flexible and straight system |
| CN113162069A (en) * | 2021-04-22 | 2021-07-23 | 武汉大学 | Method for inhibiting high-frequency oscillation of flexible direct current transmission system by active/passive damping |
-
2021
- 2021-09-22 CN CN202111105137.XA patent/CN113783220B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170140A (en) * | 2011-04-21 | 2011-08-31 | 中国电力科学研究院 | Method for starting flexible high-voltage direct-current (HVDC) system of modularized multi-level converter |
| CN105098779A (en) * | 2014-05-05 | 2015-11-25 | 长沙理工大学 | Resonance active inhibition method in flexible DC power transmission system |
| EP3179622A1 (en) * | 2015-12-08 | 2017-06-14 | ABB Technology AG | Resonant power converter |
| CN111200297A (en) * | 2020-02-03 | 2020-05-26 | 国家电网有限公司 | Amplitude and phase corrector selection method and system for improving impedance characteristics of flexible and straight system |
| CN113162069A (en) * | 2021-04-22 | 2021-07-23 | 武汉大学 | Method for inhibiting high-frequency oscillation of flexible direct current transmission system by active/passive damping |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113783220B (en) | 2024-05-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107994606B (en) | Grid-connected inverter stability analysis method under condition of multi-frequency coupling factor coexistence | |
| CN108390395B (en) | Method for online self-adaptive suppression of high-frequency oscillation caused by flexible direct current | |
| CN108039778B (en) | Constant pressure and flow WPT system and its Parameters design based on LCL-LCC compensation network | |
| CN109768565B (en) | Passive impedance adapter parameter design method and device suitable for flexible direct current | |
| CN102521452B (en) | Computing system of large power grid closed loop | |
| CN104505821A (en) | Power grid operation mode optimizing method for controlling short circuit current level | |
| Fang et al. | Control setting of unified power flow controllers through a robust load flow calculation | |
| CN112260302A (en) | Energy storage PCS multi-machine parallel resonance active suppression method of virtual RC branch circuit | |
| CN113783220B (en) | Full-band resonance suppression passive device and method for flexible direct current and storage medium | |
| CN102403728B (en) | Power oscillation suppressor based on controllable transformer and suppressing method of power oscillation suppressor | |
| CN109376392B (en) | Overvoltage calculation method and system for series compensation device | |
| CN109120000B (en) | Method for reducing link delay in flexible direct current system | |
| CN106849079A (en) | Quality of power supply on-line checking and robot control system(RCS) and method based on the grid-connected ship of distributed power source | |
| CN202309095U (en) | Power oscillation suppressor based on controllable transformer | |
| CN113224760B (en) | Parameter design method of series passive impedance adapter suitable for flexible direct current | |
| CN107423921B (en) | Power grid operation risk analysis method based on subdivision theory | |
| CN202602336U (en) | Electromobile charging station | |
| KR102681488B1 (en) | Apparatus for suppressing ac induced voltage of mmc-hvdc system and method thereof | |
| CN113991673B (en) | Multi-port common high frequency electric energy router control method and system | |
| CN115622084A (en) | Flexible direct-current high-frequency oscillation auxiliary automatic control method and system and storage medium | |
| CN104345235B (en) | Method for judging whether distributed power supply access public network model meets national standard | |
| CN111509755B (en) | Method and device for suppressing oscillation on direct current side of hybrid direct current transmission system | |
| CN109033660A (en) | Unbalanced fault analysis method and device | |
| Lizhong et al. | Research on short-circuit current suppression based on equivalent sensitivity | |
| CN203839973U (en) | Standby-type bipolar direct-current power transmission circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Guo Mingqun Inventor after: Huang Caowei Inventor after: Luo Shuhan Inventor after: Li Ming Inventor after: Zhao Zheng Inventor after: Tian Yuanyuan Inventor after: Zhang Tao Inventor after: Xiong Lingfei Inventor after: Li Tan Inventor after: Zheng Kuan Inventor after: Xu Dong Inventor before: Guo Mingqun Inventor before: Huang Caowei Inventor before: Luo Shuhan Inventor before: Li Ming Inventor before: Zhao Zheng Inventor before: Tian Yuanyuan Inventor before: Zhang Tao Inventor before: Xiong Lingfei Inventor before: Li Tan Inventor before: Zheng Kuan Inventor before: Xu Dong |
|
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20221207 Address after: 102209 Beijing Changping District Beiqijia future science and Technology North District Power Grid Corp office area Applicant after: STATE GRID ECONOMIC AND TECHNOLOGICAL RESEARCH INSTITUTE Co.,Ltd. Applicant after: BEIJING WANGLIAN DC ENGINEERING & TECHNOLOGY CO.,LTD. Address before: 102209 Beijing Changping District Beiqijia future science and Technology North District Power Grid Corp office area Applicant before: STATE GRID ECONOMIC AND TECHNOLOGICAL RESEARCH INSTITUTE Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |