CN112803468B - AC/DC complementary resonance suppression control method and device - Google Patents
AC/DC complementary resonance suppression control method and device Download PDFInfo
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- CN112803468B CN112803468B CN202110072282.6A CN202110072282A CN112803468B CN 112803468 B CN112803468 B CN 112803468B CN 202110072282 A CN202110072282 A CN 202110072282A CN 112803468 B CN112803468 B CN 112803468B
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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
- 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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- 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
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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Abstract
The invention discloses an alternating current-direct current complementary resonance suppression control method and device, and relates to a high-voltage direct current transmission project AC (100 Hz) and Z DC (50 Hz), if Z AC (100Hz)》≥Z AC·SET And Z is DC (50Hz)≤Z DC·SET Sending a first control instruction to a near-area power plant control system, wherein the first control instruction is used for requesting the near-area power plant control system to increase starting; and receiving a communication instruction generated by the near-area power plant control system in response to the first control instruction, and if the communication instruction comprises an instruction which cannot meet a starting-up increasing request, sending a second control instruction to the direct-current control system, wherein the second control instruction is used for requesting the direct-current control system to send a bipolar operation locking unipolar instruction or a unipolar operation online metal-turning return line operation instruction. The invention is used for solving the resonance problem between the high-voltage direct-current power transmission system and the alternating-current power grid system and ensuring the safe and stable operation of the direct-current power transmission system and the alternating-current power grid.
Description
Technical Field
The invention relates to a high-voltage direct-current transmission project, in particular to an alternating current-direct current complementary resonance suppression control method and device.
Background
With the development of power grids, the application of high-voltage direct-current transmission engineering is more and more extensive, and the resonance problem between a high-voltage direct-current transmission system and an alternating-current power grid system is more and more prominent. The abnormal event of alternating current and direct current complementary resonance occurs for many times in domestic and foreign power grids, the safe and stable operation of a high-voltage direct current transmission system and an alternating current power grid is seriously threatened, and the alternating current and direct current complementary resonance phenomenon is easy to occur particularly in a direct current transmitting and receiving end weak current grid system.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an alternating current-direct current complementary resonance suppression control method and device, which are used for solving the resonance problem between a high-voltage direct current transmission system and an alternating current grid system and ensuring the safe and stable operation of the direct current transmission system and the alternating current grid system.
In order to realize the purpose, the technical scheme of the invention is as follows:
an alternating current-direct current complementary resonance suppression control method comprises the following steps:
collecting the operation data of the AC power grid in real time and calculating the 2-order positive sequence harmonic impedance Z of the real-time AC system AC (100Hz)；
Collecting the running state of the DC system in real time, and calculating the fundamental frequency impedance Z of the DC system in real time DC (50Hz)；
Real-time to Z AC (100 Hz) and Z DC (50 Hz) if Z AC (100Hz)》≥Z AC·SET And Z is DC (50Hz)≤Z DC·SET Sending a first control instruction to a near-area power plant control system, wherein the first control instruction is used for requesting the near-area power plant control system to increase starting;
and receiving a communication instruction generated by the near-area power plant control system in response to the first control instruction, and if the communication instruction comprises an instruction which cannot meet a starting-up increasing request, sending a second control instruction to the direct-current control system, wherein the second control instruction is used for requesting the direct-current control system to send a bipolar operation locking unipolar instruction or a unipolar operation online metal-turning return line operation instruction.
An AC/DC complementary resonance suppression device comprises an AC system impedance real-time calculation system, a DC system impedance real-time calculation system, a near-zone power plant control system and a DC control system which are respectively connected with self control signals,
the real-time alternating current system impedance calculating system is used for collecting the operation data of the alternating current power grid in real time and calculating the 2-order positive sequence harmonic impedance Z of the real-time alternating current system AC (100Hz)；
The real-time DC system impedance calculating system collects the running state of the DC system in real time and calculates the fundamental frequency impedance Z of the real-time DC system DC (50Hz)；
The AC/DC complementary resonance suppression device is used for real-time Z pair AC (100 Hz) and Z DC (50 Hz), if Z AC (100Hz)》≥Z AC·SET And Z is DC (50Hz)≤Z DC·SET Sending a first control instruction to a near-area power plant control system, wherein the first control instruction is used for requesting the near-area power plant control system to increase starting; and receiving a communication instruction generated by the near-region power plant control system in response to the first control instruction, and if the communication instruction comprises an instruction which cannot meet a starting-up increasing request, sending a second control instruction to the direct-current control system, wherein the second control instruction is used for requesting the direct-current control system to send a bipolar operation locking unipolar instruction or a unipolar operation online metal loop switching operation instruction.
Compared with the prior art, the invention has the beneficial effects that: the invention provides an alternating current-direct current complementary resonance self-adaptive suppression method based on a power grid operation mode, which is used for solving the resonance problem between a high-voltage direct current transmission system and an alternating current power grid system and ensuring the safe and stable operation of the direct current transmission system and an alternating current power grid.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of a method of an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an ac/dc complementary resonance suppression device according to an embodiment of the present invention;
fig. 3 is a system connection diagram of a power grid according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
The embodiment is as follows:
it should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-3, fig. 1 is a flow chart of a method according to an embodiment of the present invention; fig. 2 is a schematic structural diagram of an ac/dc complementary resonance suppression device according to an embodiment of the present invention; fig. 3 is a system connection diagram of a power grid according to an embodiment of the present invention.
The invention provides an alternating current-direct current complementary resonance suppression control method and device, which are used for solving the resonance problem between a high-voltage direct current transmission system and an alternating current grid system and ensuring the safe and stable operation of the direct current transmission system and an alternating current grid.
The invention provides an alternating current-direct current complementary resonance suppression control method, which is based on alternating current-direct current complementary resonance adaptive suppression of a power grid operation mode and specifically comprises the following steps:
(1) The real-time calculation system for the impedance of the AC system collects the operation data of the AC power grid in real time and calculates the 2-order positive-sequence harmonic impedance Z of the real-time AC system AC (100Hz)；
(2) The DC system impedance real-time calculation system acquires the running state of the DC system in real time and calculates the fundamental frequency impedance Z of the DC system in real time DC (50Hz)；
(3) Real-time Z pair of AC/DC complementary resonance suppression device AC (100 Hz) and Z DC (50 Hz), if Z AC (100Hz)≥Z AC Set and Z DC (50Hz)≤Z DC And set, sending out a control measure by the alternating current and direct current complementary resonance suppression device, wherein the control measure is as follows:
(a) The AC/DC complementary resonance suppression device firstly sends a starting-up increasing request to a near-zone power plant control system of the converter station;
(b) If the increased starting-up request of the near-region power plant control system cannot be met, the alternating current and direct current complementary resonance suppression device sends a bipolar operation locking unipolar request or a unipolar operation online metal return line conversion operation request to the direct current control system.
Above Z AC Set is the 2-order positive sequence harmonic impedance constant value of the AC system, which can be taken (in ohm) according to engineering experience, Z DC Set is a direct current systemThe fundamental frequency impedance of the system is constant, and the value (unit ohm) is obtained according to engineering experience.
Examples of applications are as follows: for a practical power grid system shown in fig. 3, if an H-C ac line is tripped during operation, the "ac system impedance real-time calculation system" collects the ac power grid operation data in real time, and calculates the 2-order positive-sequence harmonic impedance Z of the real-time ac system AC (100 Hz), the DC system impedance real-time calculation system collects the running state of the DC system in real time and calculates the fundamental frequency impedance Z of the real-time DC system DC (50 Hz), "AC/DC complementary resonance suppression device" judgment Z AC (100 Hz) and Z DC Whether or not (50 Hz) satisfies a fixed value, if Z AC (100 Hz) is not less than 300 ohm and Z DC If the value of (50 Hz) is less than or equal to 400 ohm, the AC/DC complementary resonance suppression device sends a starting-up increasing request to the power plant A. If the starting request of the A power plant cannot be met, the alternating current-direct current complementary resonance suppression device sends a bipolar operation locking unipolar request or a unipolar operation online metal return line conversion operation request to the direct current engineering converter station.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (2)
1. An alternating current-direct current complementary resonance suppression control method is characterized by comprising the following steps:
collecting the operation data of the AC power grid in real time, and calculating the 2-order positive sequence harmonic impedance of the real-time AC system at the frequency of 100Hz
；
The running state of the direct current system is collected in real time, and the fundamental frequency impedance of the real-time direct current system at the frequency of 50Hz is calculated
；
Real-time judgment pair
And
make a judgment if
And is
Sending a first control instruction to a near-region power plant control system, wherein the first control instruction is used for requesting the near-region power plant control system to increase startup;
and receiving a communication instruction generated by the near-area power plant control system in response to the first control instruction, and if the communication instruction comprises an instruction which cannot meet a starting-up increasing request, sending a second control instruction to the direct-current control system, wherein the second control instruction is used for requesting the direct-current control system to send a bipolar operation locking unipolar instruction or a unipolar operation online metal-turning return line operation instruction.
2. An alternating current-direct current complementary resonance suppression device is characterized by comprising an alternating current system impedance real-time calculation system, a direct current system impedance real-time calculation system, a near-region power plant control system and a direct current control system which are respectively connected with self control signals,
the real-time alternating current system impedance calculating system is used for collecting the operation data of the alternating current power grid in real time and calculating the 2-order positive sequence harmonic impedance of the real-time alternating current system at the frequency of 100Hz
；
The real-time DC system impedance calculating system collects the running state of the DC system in real time and calculates the fundamental frequency impedance of the real-time DC system at the frequency of 50Hz
；
The AC/DC complementary resonance suppression device is used for real-time pairing
And
make a judgment if
And is provided with
Sending a first control instruction to a near-area power plant control system, wherein the first control instruction is used for requesting the near-area power plant control system to increase starting; and receiving a communication instruction generated by the near-area power plant control system in response to the first control instruction, and if the communication instruction comprises an instruction which cannot meet the requirement of increasing the starting, sending a second control instruction to the direct current control system, wherein the second control instruction is used for requesting the direct current control system to send a bipolar operation locking unipolar instruction or unipolar operationAnd (5) converting the metal return wire into an operation instruction on line.
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| CN113098048B (en) * | 2021-05-21 | 2022-05-27 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Protection control method for avoiding bipolar locking of direct-current power transmission system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103544377A (en) * | 2013-09-23 | 2014-01-29 | 南方电网科学研究院有限责任公司 | Calculating and analyzing method for resonance characteristics of direct current circuit of high-voltage direct current power transmission |
| CN105098779A (en) * | 2014-05-05 | 2015-11-25 | 长沙理工大学 | Resonance active inhibition method in flexible DC power transmission system |
| CN106208033A (en) * | 2016-08-03 | 2016-12-07 | 四川大学 | The harmonic instability determination methods of Light HVDC Transmission 12 pulse wave inverter |
| CN107086560A (en) * | 2017-06-23 | 2017-08-22 | 南方电网科学研究院有限责任公司 | The method of locking direct current, system and direct current station control cabinet under a kind of isolated island low-power |
| CN108988375A (en) * | 2018-07-12 | 2018-12-11 | 南方电网科学研究院有限责任公司 | A kind of harmonic instability analysis method counted and bilateral influences |
| CN111541263A (en) * | 2020-06-10 | 2020-08-14 | 南方电网科学研究院有限责任公司 | Harmonic control strategy evaluation method, system and equipment for flexible direct current transmission system |
| WO2020180797A1 (en) * | 2019-03-04 | 2020-09-10 | General Electric Company | Cyber-attack detection and electrical system stability for electric vehicle charging infrastructure |
| CN111969555A (en) * | 2020-07-07 | 2020-11-20 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Harmonic protection method and device for conventional direct current power transmission system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107769172B (en) * | 2017-11-09 | 2019-03-01 | 清华大学 | The system-level protection system and method for secondary/supersynchronous resonance/oscillation |
-
2021
- 2021-01-20 CN CN202110072282.6A patent/CN112803468B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103544377A (en) * | 2013-09-23 | 2014-01-29 | 南方电网科学研究院有限责任公司 | Calculating and analyzing method for resonance characteristics of direct current circuit of high-voltage direct current power transmission |
| CN105098779A (en) * | 2014-05-05 | 2015-11-25 | 长沙理工大学 | Resonance active inhibition method in flexible DC power transmission system |
| CN106208033A (en) * | 2016-08-03 | 2016-12-07 | 四川大学 | The harmonic instability determination methods of Light HVDC Transmission 12 pulse wave inverter |
| CN107086560A (en) * | 2017-06-23 | 2017-08-22 | 南方电网科学研究院有限责任公司 | The method of locking direct current, system and direct current station control cabinet under a kind of isolated island low-power |
| CN108988375A (en) * | 2018-07-12 | 2018-12-11 | 南方电网科学研究院有限责任公司 | A kind of harmonic instability analysis method counted and bilateral influences |
| WO2020180797A1 (en) * | 2019-03-04 | 2020-09-10 | General Electric Company | Cyber-attack detection and electrical system stability for electric vehicle charging infrastructure |
| CN111541263A (en) * | 2020-06-10 | 2020-08-14 | 南方电网科学研究院有限责任公司 | Harmonic control strategy evaluation method, system and equipment for flexible direct current transmission system |
| CN111969555A (en) * | 2020-07-07 | 2020-11-20 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Harmonic protection method and device for conventional direct current power transmission system |
Non-Patent Citations (2)
| Title |
|---|
| 交直流系统互补谐振谐波不稳定的抑制措施;常鹏飞等;《电测与仪表》;20200425;第57卷(第8期);第108-114页 * |
| 金中直流送端系统运行方式优化研究;黄智达等;《高电压技术》;20200131;第46卷(第1期);第161-169页 * |
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