CN112421667A - High-voltage working method and working device of high-voltage direct-current transmission converter station - Google Patents
High-voltage working method and working device of high-voltage direct-current transmission converter station Download PDFInfo
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/268—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for dc systems
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- 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
- H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
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- 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
- H02J3/01—Arrangements for reducing harmonics or ripples
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- 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
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- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention provides a high-voltage working method and a working device of a high-voltage direct-current transmission converter station, wherein an alternating-current PLC filter of the high-voltage direct-current transmission converter station is separated; adjusting a reactor and a tuning element thereof in the high-voltage direct-current transmission converter station based on the alternating-current PLC filter; simulating the running states of the alternating current PLC filter, the reactor and the tuning element thereof respectively, and decomposing through simulation analysis; the alternating current PLC filter is provided with a bypass switch and an isolation switch, when any one of the alternating current PLC filter, the reactor and the tuning element breaks down, the bypass circuit breaker is quickly closed to bypass and isolate the broken PLC equipment, so that the high-voltage direct current power transmission system is isolated from the faults without power outage, the equipment fault emergency maintenance is carried out, and the direct current transmission power is not influenced.
Description
Technical Field
The invention relates to the field of high-voltage direct-current transmission, in particular to a high-voltage working method and a working device of a high-voltage direct-current transmission converter station.
Background
High voltage direct current transmission systems are very important energy transmission systems in power systems. In order to avoid interference of high frequency harmonics generated by a High Voltage Direct Current (HVDC) converter valve on power carrier communication, a PLC filter is generally installed at an ac/dc side of a converter station. The typical value of the power line carrier communication frequency range adopted by China is 40 kHz-500 kHz.
The PLC filter is mainly designed to reduce high-frequency harmonic noise of a power carrier frequency band of an alternating current bus output by a converter valve, however, due to overheating of a line and burnout of a tuning capacitor, a direct current system is shut down.
Disclosure of Invention
The invention aims to provide a high-voltage working method and a working device of a high-voltage direct-current transmission converter station, which solve the problem of shutdown of a direct-current system in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
according to one aspect of the invention, the invention provides a high-voltage operation method of a high-voltage direct-current transmission converter station, which comprises the following steps: separating an alternating current PLC filter of the high-voltage direct current transmission converter station; adjusting a reactor and a tuning element thereof in the high-voltage direct-current transmission converter station based on the alternating-current PLC filter; simulating the running states of the alternating current PLC filter, the reactor and the tuning element thereof respectively, and decomposing through simulation analysis; and a bypass switch and an isolation switch are arranged on the alternating current PLC filter, and when any one of the alternating current PLC filter, the reactor and the tuning element fails, the failed PLC device is bypassed and isolated by quickly closing the bypass breaker switch, so that the high-voltage direct-current power transmission system is isolated from the failure without power outage.
According to an aspect of the present disclosure, there is provided a high voltage operation device of a high voltage direct current transmission converter station, comprising: the separation module is used for separating an alternating current PLC filter of the high-voltage direct current transmission converter station; the adjusting module is used for adjusting the reactor and the tuning element thereof in the high-voltage direct-current transmission converter station based on the alternating-current PLC filter; the simulation module is used for simulating the running states of the alternating current PLC filter, the reactor and the tuning element thereof respectively, and decomposing the running states through simulation analysis; and the isolation module is used for installing a bypass switch and an isolation switch on the alternating current PLC filter, and after any one of the alternating current PLC filter, the reactor and the tuning element breaks down, the bypass of the broken PLC equipment is quickly closed and isolated by the bypass breaker, so that the high-voltage direct-current power transmission system is isolated from the fault without power outage.
According to an aspect of the present disclosure, there is provided a computer readable program medium storing computer program instructions which, when executed by a computer, cause the computer to perform the method according to the above.
According to an aspect of the present disclosure, there is provided an electronic apparatus including: a processor; a memory having computer readable instructions stored thereon which, when executed by the processor, implement the method described above.
According to the technical scheme, the embodiment of the invention at least has the following advantages and positive effects:
in the technical solutions provided by some embodiments of the present invention, an ac PLC filter of a hvdc transmission converter station is separated; adjusting a reactor and a tuning element thereof in the high-voltage direct-current transmission converter station based on the alternating-current PLC filter; simulating the running states of the alternating current PLC filter, the reactor and the tuning element thereof respectively, and decomposing through simulation analysis; the alternating current PLC filter is provided with a bypass switch and an isolation switch, when any one of the alternating current PLC filter, the reactor and the tuning element breaks down, the bypass circuit breaker is quickly closed to bypass and isolate the broken PLC equipment, so that the high-voltage direct current power transmission system is isolated from the faults without power outage, the equipment fault emergency maintenance is carried out, and the direct current transmission power is not influenced.
Drawings
Fig. 1 is a flow chart illustrating a method of high voltage operation of a hvdc transmission converter station according to an exemplary embodiment.
Fig. 2 is a schematic flow diagram illustrating the separation of an ac PLC filter of a hvdc transmission converter station according to an exemplary embodiment.
Fig. 3 is a schematic view of a conventional converter station arrangement.
Fig. 4 is a schematic diagram showing the interference level at the ac outlet end and the voltage and current of the noise filter after the L1 reactor and its tuning element TDL1 are removed.
Fig. 5 is a schematic diagram of the interference level at the end of the outgoing line and the voltage and current of the noise filter after the L1 reactor and tuning elements TDL1, TDL2 are eliminated.
Fig. 6 is a block diagram illustrating an integrated control device of a substation according to an exemplary embodiment.
FIG. 7 is a hardware diagram illustrating an electronic device according to an example embodiment.
Fig. 8 is a computer readable storage medium illustrating a method of high voltage operation of a hvdc transmission converter station in accordance with an exemplary embodiment.
Detailed Description
Exemplary embodiments that embody features and advantages of the invention are described in detail below in the specification. It is to be understood that the invention is capable of other embodiments and that various changes in form and details may be made therein without departing from the scope of the invention and the description and drawings are to be regarded as illustrative in nature and not as restrictive.
High voltage direct current transmission systems are very important energy transmission systems in power systems. In order to avoid interference of high frequency harmonics generated by a High Voltage Direct Current (HVDC) converter valve on power carrier communication, a PLC filter is generally installed at an ac/dc side of a converter station. The typical value of the power line carrier communication frequency range adopted by China is 40 kHz-500 kHz.
The PLC filter is mainly designed to reduce high-frequency harmonic noise of a power carrier frequency band of an alternating current bus output by a converter valve, however, due to overheating of a line and burnout of a tuning capacitor, a direct current system is shut down.
In addition, since 2016, a direct current power transmission system in gold is put into operation, 3 direct current system shutdown events caused by overheating of leads of alternating current PLC noise filtering tuning elements and burning of tuning capacitors occur in sequence. In the south power grid system, the smoke and fire accidents of the alternating current PLC filter tuning elements of the converter stations occur in recent years, and equipment faults all occur in the period of full load operation of the direct current system in summer at the peak. After the alternating current PLC filter breaks down, the direct current system fault pole operation is required to be powered off, then the fault can be processed, the whole maintenance process probably needs 12 hours, the electric quantity loss is about 1900 kilowatt hours, and the water in the Yunnan hydropower station is seriously abandoned.
According to an embodiment of the present disclosure, there is provided a high voltage operation method of a hvdc transmission converter station, as shown in fig. 1 to 5, including:
step S110, separating an alternating current PLC filter of the high-voltage direct current transmission converter station;
step S120, adjusting a reactor and a tuning element thereof in the high-voltage direct-current transmission converter station based on the alternating-current PLC filter;
step S130, simulating the running states of the alternating current PLC filter, the reactor and the tuning element thereof, and decomposing through simulation analysis;
and S140, installing a bypass switch and an isolation switch on the alternating current PLC filter, and when any one of the alternating current PLC filter, the reactor and the tuning element breaks down, quickly closing the bypass breaker to bypass and isolate the failed PLC device, so that the high-voltage direct-current power transmission system is isolated from the fault without power outage.
As shown in fig. 1 to 5, in some embodiments of the present invention, based on the foregoing scheme, an ac PLC filter of the hvdc transmission converter station is separated; adjusting a reactor and a tuning element thereof in the high-voltage direct-current transmission converter station based on the alternating-current PLC filter; simulating the running states of the alternating current PLC filter, the reactor and the tuning element thereof respectively, and decomposing through simulation analysis; the alternating current PLC filter is provided with a bypass switch and an isolation switch, when any one of the alternating current PLC filter, the reactor and the tuning element breaks down, the bypass circuit breaker is quickly closed to bypass and isolate the broken PLC equipment, so that the high-voltage direct current power transmission system is isolated from the faults without power outage, the equipment fault emergency maintenance is carried out, and the direct current transmission power is not influenced.
These steps are described in detail below.
In step S110, an ac PLC filter of the hvdc transmission converter station is separated;
the alternating current PLC filter is used as a part of the high-voltage direct-current transmission converter station, the alternating current PLC filter is separated from the high-voltage direct-current transmission converter station, so that subsequent modeling of the alternating current PLC filter is facilitated, and subsequent simulation measurement and calculation are conducted on the basis of the alternating current PLC filter as a model.
As shown in fig. 1 to 5, the ac PLC filter for separating the hvdc transmission converter station includes:
step S111, establishing a high-frequency model of the alternating current PLC filter;
and S112, carrying out simulation calculation on the high-frequency harmonic voltage distribution of the alternating current bus through Matlab, wherein the alternating current system adopts a system equivalent model to replace a line model, and a limit value is set for the high-frequency noise level according to the research on the power line carrier interference of the high-frequency harmonic of the converter valve.
According to a high-frequency voltage spectrum of a 12-pulse converter valve adopted in a PLC filter research report in direct-current engineering and high-frequency models of equipment such as a converter transformer, an alternating-current filter and the like, simulation calculation is carried out on high-frequency harmonic voltage distribution of an alternating-current bus through Matlab, wherein a system equivalent model is adopted for replacing a line model in an alternating-current system, and a limit value is set for a high-frequency noise level according to the research on power line carrier interference of high-frequency harmonics of the converter valve.
The high-frequency model of the alternating current PLC filter is a high-frequency voltage frequency spectrum of a 12-pulse converter valve and an equipment model of the converter transformer and the alternating current filter.
As shown in fig. 1 to 5, in step S120, the reactor and its tuning element in the hvdc transmission converter station are adjusted based on the ac PLC filter.
The reactor and the tuning element thereof have the adjusting effect as the electronic components of the high-voltage direct-current transmission converter station, wherein the reactor and the tuning element thereof have two models respectively, the reactor has a model L1 and a model L2, and the tuning element has a model TDL1 and a model TDL 2.
As shown in fig. 1 to 5, in step S130, the operating states of the ac PLC filter, the reactor and the tuning element thereof are simulated and decomposed by simulation analysis.
And adjusting the reactor and the tuning element thereof in the high-voltage direct-current transmission converter station based on the alternating-current PLC filter. The optimization research of the reactor and the tuning element TDL of the AC PLC filter is calculated through modeling and simulated analysis, the high-frequency harmonic generated by the converter valve is obtained, and the good high-frequency harmonic suppression effect is still achieved after the reactors L1 and L2 and the tuning elements TDL1 and TDL2 of the AC PLC filter are cancelled, so that the influence on a PLC communication system on an AC inlet/outlet line of a converter station of a high-voltage DC power transmission system or a PLC communication system used by other power transmission projects is avoided.
The simulation of the running states of the alternating current PLC filter, the reactor and the tuning element thereof respectively and the decomposition through simulation analysis comprises the following steps:
eliminating the reactor and the tuning element thereof;
and limiting the noise range of the alternating current PLC filter to be more than 40 kHz.
Simulation calculation shows that for high-frequency harmonics generated by the converter valve, good high-frequency harmonic suppression effect is still achieved after the L1 reactor and tuning elements TDL1 and TDL2 are eliminated. The high-frequency harmonic out-of-limit condition exists near 30kHz, but the normal work of carrier communication is not influenced. Meanwhile, comparing the electrical quantity responses of the complete PLC filter and the filter after the element is cancelled, the fact that under the same harmonic voltage source, after the L1 reactor is cancelled, the currents and voltages in the remaining elements L2 and C2 are smaller, and the actual operation requirements are met under the condition that the equipment parameters are not changed. The current voltage of L2 and C2 is increased by only 20% after the TDL2 tuning element is removed, and is still lower than the rated level of the device.
In addition, the scheme of eliminating the L1 reactor and the tuning element TDL1 can effectively limit high-frequency noise above 40 kHz; in the interval of 30 kHz-40 kHz, although the high-frequency harmonic interference level is out of limit, the harmonic wave of the frequency band does not influence the carrier communication of an alternating current station connected with a converter station in the middle. Meanwhile, the C2 coupling capacitor, the L2 reactor and the tuning element TDL2 thereof have no overvoltage or overcurrent.
As shown in fig. 1 to 5, in step S140, when a fault occurs in any one of the ac PLC filter, the reactor, and the tuning element, the ac PLC filter is provided with a bypass switch and an isolation switch, and the bypass breaker is quickly turned on to bypass and isolate the faulty PLC device, so as to isolate the fault without power outage in the high voltage dc power transmission system, including:
by quickly closing the isolation disconnecting link, the high-voltage direct-current power transmission system can be subjected to fault maintenance treatment while being not powered off, and an alternating-current PLC can be put into operation of the direct-current system on line after the fault treatment is finished.
The feasibility analysis of PLC filters L1 and L2 reactors and tuning elements TDL1 and TDL2 is cancelled through simulation analysis, after any element in alternating current PLC filters L1 and L2 and tuning elements TDL1 and TDL2 breaks down, a bypass switch is quickly turned on and knife switches on two sides are pulled open to bypass and isolate the failed PLC equipment, the high-voltage direct-current transmission system is isolated from the fault without power outage, emergency overhaul of the equipment fault is carried out, and direct-current transmission power is not affected.
Furthermore, after any element in alternating current PLC filter reactors L1 and L2 and tuning elements TDL1 and TDL2 breaks down, a failed PLC device is bypassed and isolated by researching rapid closing of a bypass breaker, the high-voltage direct current power transmission system is isolated from the fault without power outage, and the power transmission capacity and the power transmission reliability are not influenced.
In addition, by closing the grounding knife of the alternating current PLC equipment, the high-voltage direct current power transmission system can be subjected to fault maintenance treatment while being not powered off, and the alternating current PLC can be put into operation of the direct current system on line after the fault treatment is finished. The direct current system is shut down and overhauled due to the fact that the alternating current PLC is failed, single time is saved by 12 hours approximately, the electric quantity is conveyed by 1900 ten thousand kilowatts, water loss of Yunnan hydropower is greatly reduced, and good social reputation is won for enterprises.
At the interchange PLC wave filter installs bypass switch and isolation switch, after arbitrary equipment broke down in interchange PLC wave filter, reactor and tuning element, through closing fast the PLC equipment bypass and the isolation of trouble are with the bypass circuit breaker, realize that high voltage direct current transmission system does not have a power failure and keep apart the trouble, still include:
the bypass cut-off switch isolates the ac PLC filter so that the ac PLC filter is separated from the faulty PLC device.
The alternating current PLC filter is isolated through the bypass breaker switch, and is separated from the failed PLC device, so that the alternating current PLC filter is independent and controllable, and is effectively isolated by the bypass breaker switch.
Through research, an alternating current PLC filter bypass switch and a disconnecting link are arranged, after any element in alternating current PLC filter reactors L1 and L2 and tuning elements TDL1 and TDL2 breaks down, a bypass breaker is quickly closed to bypass and isolate the failed alternating current PLC equipment, the direct current system is enabled to carry out fault maintenance processing without power outage by closing a grounding switch of the disconnecting switch, and after the fault processing is finished, the alternating current PLC can be put into the direct current system in operation on line, so that the power transmission capacity and the power transmission reliability are not affected. The direct current system is shut down and overhauled due to the fact that the alternating current PLC is failed, single time is saved by 12 hours approximately, the electric quantity is conveyed by 1900 ten thousand kilowatts, water loss of Yunnan hydropower is greatly reduced, and good social reputation is won for enterprises.
In addition, the optimization research of the reactor for canceling the alternating current PLC filter and the tuning element TDL thereof through modeling calculation and simulation analysis obtains that the interference level at the end part of the outlet wire of the converter station and the voltage and the current of the noise filter are still in a limited range after the high-frequency harmonic wave generated by the converter valve is cancelled by canceling the reactors L1 and L2 of the alternating current PLC filter and the tuning elements TDL1 and TDL2, the harmonic wave still has good high-frequency harmonic wave suppression effect, and the high-frequency harmonic wave suppression effect cannot influence a PLC communication system on the alternating current outlet wire of the converter station or a PLC communication system used by other power transmission projects.
According to the technical scheme, the embodiment of the invention at least has the following advantages and positive effects:
in the technical solutions provided by some embodiments of the present invention, an ac PLC filter of a hvdc transmission converter station is separated; adjusting a reactor and a tuning element thereof in the high-voltage direct-current transmission converter station based on the alternating-current PLC filter; simulating the running states of the alternating current PLC filter, the reactor and the tuning element thereof respectively, and decomposing through simulation analysis; the alternating current PLC filter is provided with a bypass switch and an isolation switch, when any one of the alternating current PLC filter, the reactor and the tuning element breaks down, the bypass circuit breaker is quickly closed to bypass and isolate the broken PLC equipment, so that the high-voltage direct current power transmission system is isolated from the faults without power outage, the equipment fault emergency maintenance is carried out, and the direct current transmission power is not influenced.
And after any element in the alternating current PLC filter reactors L1 and L2 and the tuning elements TDL1 and TDL2 breaks down, a bypass switch is quickly turned on and knife switches on two sides are pulled open to bypass and isolate the failed PLC equipment, the alternating current PLC equipment grounding knife is turned on, the high-voltage direct current power transmission system can be subjected to fault maintenance treatment while the high-voltage direct current power transmission system is not powered off, the alternating current PLC can be put into the direct current system on line during operation after the fault treatment is finished, the high-voltage direct current power transmission system is enabled to be subjected to fault isolation and maintenance treatment without the power off, and the power transmission capacity and the power transmission reliability are not influenced.
The above detailed description is specific to possible embodiments of the present invention, and the embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the scope of the present invention are intended to be included within the scope of the present invention.
As shown in fig. 6, in one embodiment, the integrated control device 200 of the substation further includes:
the separation module 210 is configured to separate an ac PLC filter of the hvdc transmission converter station;
an adjusting module 220, configured to adjust a reactor and a tuning element thereof in the high-voltage dc transmission converter station based on the ac PLC filter;
the simulation module 230 is used for simulating the running states of the alternating current PLC filter, the reactor and the tuning element thereof respectively, and decomposing the running states through simulation analysis;
and the isolation module 240 is used for installing a bypass switch and an isolation switch on the alternating-current PLC filter, and after any one of the alternating-current PLC filter, the reactor and the tuning element fails, the bypass of the failed PLC device is bypassed and isolated by quickly closing the bypass breaker switch, so that the high-voltage direct-current power transmission system is isolated from the failure without power outage.
An electronic device 40 according to this embodiment of the present invention is described below with reference to fig. 7. The electronic device 40 shown in fig. 4 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiment of the present invention.
As shown in fig. 7, electronic device 40 is embodied in the form of a general purpose computing device. The components of electronic device 40 may include, but are not limited to: the at least one processing unit 41, the at least one memory unit 42, and a bus 43 connecting the various system components (including the memory unit 42 and the processing unit 41).
Wherein the storage unit stores program code executable by the processing unit 41 to cause the processing unit 41 to perform the steps according to various exemplary embodiments of the present invention described in the section "example methods" above in this specification.
The storage unit 42 may include readable media in the form of volatile memory units, such as a random access memory unit (RAM)421 and/or a cache memory unit 422, and may further include a read only memory unit (ROM) 423.
The storage unit 42 may also include a program/utility 424 having a set (at least one) of program modules 425, such program modules 425 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may comprise an implementation of a network environment.
The electronic device 40 may also communicate with one or more external devices (e.g., keyboard, pointing device, bluetooth device, etc.), with one or more devices that enable a user to interact with the electronic device 40, and/or with any devices (e.g., router, modem, etc.) that enable the electronic device 40 to communicate with one or more other computing devices. Such communication may be through an input/output (I/O) interface 45. Also, the electronic device 40 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the Internet) via the network adapter 46. As shown in FIG. 7, the network adapter 46 communicates with the other modules of the electronic device 40 via the bus 43. It should be appreciated that although not shown in FIG. 7, other hardware and/or software modules may be used in conjunction with electronic device 40, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, among others.
Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein may be implemented by software, or by software in combination with necessary hardware. Therefore, the technical solution according to the embodiments of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a usb disk, a removable hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which may be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to the embodiments of the present disclosure.
There is also provided, in accordance with an embodiment of the present disclosure, a computer-readable storage medium having stored thereon a program product capable of implementing the above-described method of the present specification. In some possible embodiments, aspects of the invention may also be implemented in the form of a program product comprising program code means for causing a terminal device to carry out the steps according to various exemplary embodiments of the invention described in the above section "exemplary methods" of the present description, when said program product is run on the terminal device.
Referring to fig. 8, a program product 50 for implementing the above method according to an embodiment of the present invention is described, which may employ a portable compact disc read only memory (CD-ROM) and include program code, and may be run on a terminal device, such as a personal computer. However, the program product of the present invention is not limited in this regard and, in the present document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
A computer readable signal medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., through the internet using an internet service provider).
Furthermore, the above-described figures are merely schematic illustrations of processes involved in methods according to exemplary embodiments of the invention, and are not intended to be limiting. It will be readily understood that the processes shown in the above figures are not intended to indicate or limit the chronological order of the processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, e.g., in multiple modules.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is only limited by the appended claims.
Claims (9)
1. A high-voltage working method of a high-voltage direct-current transmission converter station is characterized by comprising the following steps:
separating an alternating current PLC filter of the high-voltage direct current transmission converter station;
adjusting a reactor and a tuning element thereof in the high-voltage direct-current transmission converter station based on the alternating-current PLC filter;
simulating the running states of the alternating current PLC filter, the reactor and the tuning element thereof respectively, and decomposing through simulation analysis;
and a bypass switch and an isolation switch are arranged on the alternating current PLC filter, and when any one of the alternating current PLC filter, the reactor and the tuning element fails, the failed PLC device is bypassed and isolated by quickly closing the bypass breaker switch, so that the high-voltage direct-current power transmission system is isolated from the failure without power outage.
2. The method of high voltage operation of a hvdc transmission converter station in accordance with claim 1 wherein said isolating said ac PLC filter of said hvdc transmission converter station comprises:
establishing a high-frequency model of the alternating current PLC filter;
and carrying out simulation calculation on the high-frequency harmonic voltage distribution of the alternating-current bus by Matlab, wherein the alternating-current system adopts a system equivalent model to replace a line model, and a limit value is set for the high-frequency noise level according to the research on the power line carrier interference of the high-frequency harmonic of the converter valve.
3. The method of high voltage operation of a hvdc transmission converter station according to claim 2 wherein said high frequency model of said ac PLC filter is a 12-pulse converter valve high frequency voltage spectrum and a converter transformer, ac filter plant model.
4. The high voltage operation method of the hvdc transmission converter station in accordance with claim 3, wherein said simulating the operation status of said ac PLC filter and said reactor and its tuning element, respectively, and decomposing by simulation analysis comprises:
eliminating the reactor and the tuning element thereof;
and limiting the noise range of the alternating current PLC filter to be more than 40 kHz.
5. The high voltage operation method of the hvdc transmission converter station in accordance with claim 1, wherein said ac PLC filter is installed with a bypass switch and an isolation switch, and when any one of said ac PLC filter, said reactor and said tuning element is failed, said bypass breaker is quickly turned on to bypass and isolate the failed PLC device, thereby isolating the failure of the hvdc transmission system without power outage, comprising:
by quickly closing the isolation disconnecting link, the high-voltage direct-current power transmission system can be subjected to fault maintenance treatment while being not powered off, and an alternating-current PLC can be put into operation of the direct-current system on line after the fault treatment is finished.
6. The high voltage operation method of the hvdc transmission converter station in accordance with claim 5, wherein a bypass switch and an isolation switch are installed on said ac PLC filter, and when any one of said ac PLC filter, said reactor and said tuning element fails, said bypass breaker is quickly closed to bypass and isolate the failed PLC device, thereby achieving non-stop isolation of the fault in the hvdc transmission system, further comprising:
the bypass cut-off switch isolates the ac PLC filter so that the ac PLC filter is separated from the faulty PLC device.
7. A high voltage operation arrangement for a hvdc transmission converter station, comprising:
the separation module is used for separating an alternating current PLC filter of the high-voltage direct current transmission converter station;
the adjusting module is used for adjusting the reactor and the tuning element thereof in the high-voltage direct-current transmission converter station based on the alternating-current PLC filter;
the simulation module is used for simulating the running states of the alternating current PLC filter, the reactor and the tuning element thereof respectively, and decomposing the running states through simulation analysis;
and the isolation module is used for installing a bypass switch and an isolation switch on the alternating current PLC filter, and after any one of the alternating current PLC filter, the reactor and the tuning element breaks down, the bypass of the broken PLC equipment is quickly closed and isolated by the bypass breaker, so that the high-voltage direct-current power transmission system is isolated from the fault without power outage.
8. A computer-readable program medium, characterized in that it stores computer program instructions which, when executed by a computer, cause the computer to perform the method according to any one of claims 1 to 6.
9. An electronic device, comprising:
a processor;
a memory having stored thereon computer readable instructions which, when executed by the processor, implement the method of any of claims 1 to 6.
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| CN114552644A (en) * | 2022-03-02 | 2022-05-27 | 中国南方电网有限责任公司超高压输电公司柳州局 | Converter station alternating current filter phase selection and closing effect discrimination method based on wave recording data |
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