CN110729747A - Valve bank locking processing method and device for multi-terminal extra-high voltage direct current transmission system - Google Patents
Valve bank locking processing method and device for multi-terminal extra-high voltage direct current transmission system Download PDFInfo
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- CN110729747A CN110729747A CN201910925828.0A CN201910925828A CN110729747A CN 110729747 A CN110729747 A CN 110729747A CN 201910925828 A CN201910925828 A CN 201910925828A CN 110729747 A CN110729747 A CN 110729747A
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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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- 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 a valve bank locking disposal method and device for a multi-terminal extra-high voltage direct current transmission system, and relates to the technical field of direct current transmission, wherein the method comprises the following steps of 1: setting a direct current power threshold fixed value P _ set; step 2: when a single valve bank is locked at a certain pole of a station, judging whether inter-station communication fails, if the inter-station communication fails, automatically locking another valve bank at the same pole of the station, if the inter-station communication fails, judging whether the locked valve bank is a valve bank of a rectification station, and if the locked valve bank is the valve bank of the rectification station, locking one valve bank at the same pole of other stations; if the blocked valve group is not the valve group of the rectifying station, comparing the power value P _ block of the blocked valve group with the DC power threshold value P _ set, the invention solves the problem of how to realize the optimal treatment effect of the minimum DC power loss under the condition of single valve group blocking of a certain station when one valve group of a certain pole of the certain station has multiple treatment schemes.
Description
Technical Field
The invention relates to the technical field of direct current transmission, in particular to a valve bank locking disposal method and device for a multi-terminal ultra-high voltage direct current transmission system.
Background
The multi-terminal direct-current transmission system is a transmission system formed by three or more converter stations in a certain connection mode, and can realize multipoint power supply and multipoint power receiving. When one converter station quits operation, the direct current cannot be stopped like a direct current transmission system at two ends, and the power can still be exchanged among other converter stations by the multi-end direct current transmission system under the power coordination control, so that the multi-end direct current is a development direction of the current direct current transmission project due to the transmission flexibility.
For an extra-high voltage direct-current transmission system at two ends, when one valve bank of a certain pole of a station is locked, the same pole of another station must lock one valve bank. For a multi-terminal extra-high voltage direct current transmission system, when one valve bank of a certain pole of a certain station is locked, various disposal schemes exist, one valve bank of the same pole of other stations can be selectively locked, another valve bank which runs at the same pole of the station can also be selectively locked, and how to achieve the optimal disposal effect is worth researching.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a valve bank locking treatment method and device for a multi-terminal extra-high voltage direct current transmission system, so as to realize the optimal treatment effect of the minimum direct current power loss under the condition of locking a single valve bank in a certain station.
In order to achieve the purpose, the invention provides a valve bank locking disposal method of a multi-terminal extra-high voltage direct current transmission system, which comprises the following steps:
step 1: setting a direct current power threshold fixed value P _ set;
step 2: when a single valve bank is locked at a certain pole of a station, judging whether the locked valve bank is the valve bank of a rectification station, if the locked valve bank is the valve bank of the rectification station, locking one valve bank at the same pole of other stations; if the blocked valve group is not the valve group of the rectifying station, comparing the power value P _ block of the blocked valve group with the direct current power threshold value P _ set, if the power value P _ block of the blocked valve group is larger than the direct current power threshold value P _ set, adopting a handling mode that one valve group needs to be blocked in the same pole of other stations, and if the power value P _ block of the blocked valve group is smaller than or equal to the direct current power threshold value P _ set, adopting a handling mode that the other valve group in the same pole of the station is blocked.
The valve bank locking disposal method for the multi-terminal extra-high voltage direct current transmission system further includes the following step 2: before judging whether the locked valve bank is the valve bank of the rectifier station, judging whether inter-station communication fails, if the inter-station communication fails, automatically locking the other valve bank of the same pole of the station, and if the inter-station communication fails, judging whether the locked valve bank is the valve bank of the rectifier station.
A device utilizing the valve bank locking processing method of the multi-terminal extra-high voltage direct current transmission system comprises a valve bank locking processing device of the multi-terminal extra-high voltage direct current transmission system, one end of the valve bank locking processing device of the multi-terminal extra-high voltage direct current transmission system is connected with j sending end converter station direct current control devices, the other end of the valve bank locking processing device of the multi-terminal extra-high voltage direct current transmission system is connected with k receiving end converter station direct current control devices, the sum of the number of j and k is not less than 3, the valve bank locking processing device of the multi-terminal extra-high voltage direct current transmission system is connected with a direct current operation control interface, and the direct current operation control; the valve group locking treatment device of the multi-terminal ultra-high voltage direct current transmission system is used for receiving locking and unlocking signals and power values P _ block of direct current control devices of all transmitting-end converter stations and receiving-end converter station direct current control devices in real time, calculating and judging the power values P _ block and direct current power threshold set values P _ set, and then sending locking and unlocking signals to the corresponding transmitting-end converter station direct current control devices or receiving-end converter station direct current control devices for execution.
Compared with the prior art, the invention has the beneficial effects that: the invention solves the problem of how to realize the optimal treatment effect of the minimum direct current power loss under the condition of locking a single valve bank of a certain station when a plurality of treatment schemes exist when one valve bank of a certain pole of the certain station is locked.
Drawings
FIG. 1 is a flow chart of a latch handling method according to an embodiment of the present invention;
FIG. 2 is a topology diagram of a hybrid three terminal DC power transmission system;
fig. 3 is a structural diagram of a valve bank locking disposal device of the multi-terminal extra-high voltage direct current transmission system.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Example (b):
FIG. 1 is a flow chart of a valve block lockout handling method of a multi-terminal ultra-high voltage direct current transmission system according to an embodiment of the present invention, and the method includes the following steps
Step 1: and setting a direct current power threshold fixed value P _ set.
Step 2: when a single valve bank is locked at a certain pole of a station, the single valve bank refers to a high-end valve bank or a low-end valve bank, whether inter-station communication fails or not is judged, if the inter-station communication fails, the other valve bank at the same pole of the station is automatically locked, if the inter-station communication fails, whether the locked valve bank is a valve bank of a rectifier station is judged, and if the locked valve bank is the valve bank of the rectifier station, one valve bank needs to be locked at the same pole of other stations; if the blocked valve group is not a valve group of the rectifier station, in this embodiment, that is, a valve group of the inverter station, the magnitude of the power value P _ block of the blocked valve group is compared with the dc power threshold value P _ set, if the power value P _ block of the blocked valve group is greater than the dc power threshold value P _ set, a handling manner that one valve group needs to be blocked by the same pole of another station is adopted, and if the power value P _ block of the blocked valve group is less than or equal to the dc power threshold value P _ set, a handling manner that another valve group of the same pole of the station is blocked is adopted.
Fig. 2 is a topological diagram of a hybrid three-terminal dc power transmission system, in which a transmitting terminal is a group of rectifying stations, and a receiving terminal is two groups of inverting stations. FIG. 3 is a structural diagram of a valve bank locking processing device of a multi-terminal UHVDC system according to the present invention, and a device using the valve bank locking processing method of the multi-terminal UHVDC system includes the valve bank locking processing device of the multi-terminal UHVDC system, one end of the valve bank locking processing device of the multi-terminal UHVDC system is connected with j sending end converter station DC control devices, the other end is connected with k receiving end converter station DC control devices, the sum of the j and k numbers is not less than 3, the sending end converter station DC control device controls the locking or unlocking of the valve bank of the rectifier station in the method, the receiving end converter station DC control device controls the locking or unlocking of the valve bank of the inverter station in the method, the valve bank locking processing device of the multi-terminal UHVDC system is used for receiving the locking and unlocking signals of the DC control devices of the sending end converter station and the DC control devices of the receiving end converter station in real time, The valve group locking treatment device of the multi-terminal ultra-high voltage direct current transmission system is further connected with a direct current operation control interface, the direct current operation control interface is used for setting a direct current power threshold value P _ set, the direct current power threshold value P _ set is set by an operator on the direct current operation control interface, and the unit MW is used for comparing with the power value of the valve group with the fault to determine which locking treatment method is adopted.
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 (3)
1. A valve bank locking disposal method of a multi-terminal extra-high voltage direct current transmission system is characterized by comprising the following steps:
step 1: setting a direct current power threshold fixed value P _ set;
step 2: when a single valve bank is locked at a certain pole of a station, judging whether the locked valve bank is the valve bank of a rectification station, if the locked valve bank is the valve bank of the rectification station, locking one valve bank at the same pole of other stations; if the blocked valve group is not the valve group of the rectifying station, comparing the power value P _ block of the blocked valve group with the direct current power threshold value P _ set, if the power value P _ block of the blocked valve group is larger than the direct current power threshold value P _ set, adopting a handling mode that one valve group needs to be blocked in the same pole of other stations, and if the power value P _ block of the blocked valve group is smaller than or equal to the direct current power threshold value P _ set, adopting a handling mode that the other valve group in the same pole of the station is blocked.
2. The valve group locking disposal method for the multi-terminal extra-high voltage direct current transmission system according to claim 1, wherein the step 2 further comprises: before judging whether the locked valve bank is the valve bank of the rectifier station, judging whether inter-station communication fails, if the inter-station communication fails, automatically locking the other valve bank of the same pole of the station, and if the inter-station communication fails, judging whether the locked valve bank is the valve bank of the rectifier station.
3. A valve bank locking disposal device of a multi-end extra-high voltage direct current transmission system comprises the valve bank locking disposal device of the multi-end extra-high voltage direct current transmission system, one end of the valve bank locking disposal device of the multi-end extra-high voltage direct current transmission system is connected with j sending end converter station direct current control devices, the other end of the valve bank locking disposal device of the multi-end extra-high voltage direct current transmission system is connected with k receiving end converter station direct current control devices, and the sum of the number of j and k is not less than 3; the valve group locking treatment device of the multi-terminal ultra-high voltage direct current transmission system is used for receiving locking and unlocking signals and power values P _ block of direct current control devices of all transmitting-end converter stations and receiving-end converter station direct current control devices in real time, calculating and judging the power values P _ block and direct current power threshold set values P _ set, and then sending locking and unlocking signals to the corresponding transmitting-end converter station direct current control devices or receiving-end converter station direct current control devices for execution.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910925828.0A CN110729747B (en) | 2019-09-27 | 2019-09-27 | Valve bank locking processing method and device for multi-terminal extra-high voltage direct current transmission system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910925828.0A CN110729747B (en) | 2019-09-27 | 2019-09-27 | Valve bank locking processing method and device for multi-terminal extra-high voltage direct current transmission system |
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| CN110729747A true CN110729747A (en) | 2020-01-24 |
| CN110729747B CN110729747B (en) | 2020-12-04 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111463762A (en) * | 2020-04-10 | 2020-07-28 | 中国南方电网有限责任公司 | Multi-terminal high-voltage direct-current power transmission system composite fault coordination handling method, device and terminal |
| CN111769526A (en) * | 2020-07-07 | 2020-10-13 | 北京四方继保自动化股份有限公司 | Valve group fault exit control method for extra-high voltage multi-terminal hybrid direct-current transmission system |
| WO2022135596A1 (en) * | 2020-12-25 | 2022-06-30 | 中国电力科学研究院有限公司 | Inter-polar power compensation control method for multi-infeed high voltage direct current weak system |
| CN115333098A (en) * | 2022-09-20 | 2022-11-11 | 中国南方电网有限责任公司超高压输电公司昆明局 | Method, device and equipment for sequential locking treatment of double valve banks of multi-terminal direct-current power transmission system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104184138A (en) * | 2014-08-21 | 2014-12-03 | 南京南瑞继保电气有限公司 | Method for one end of multi-end flexible direct-current power transmission system to exit from operation system |
| JP2017011916A (en) * | 2015-06-24 | 2017-01-12 | 株式会社日立製作所 | Multiterminal dc power transmission system |
| CN108879753A (en) * | 2018-07-23 | 2018-11-23 | 南方电网科学研究院有限责任公司 | Extra-high voltage DC transmission system single valve group failure exits method, system and equipment |
| CN108879625A (en) * | 2018-07-19 | 2018-11-23 | 南京南瑞继保电气有限公司 | A kind of parallel connection multiterminal extra-high voltage direct-current transmission valve unit protection action processing method |
-
2019
- 2019-09-27 CN CN201910925828.0A patent/CN110729747B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104184138A (en) * | 2014-08-21 | 2014-12-03 | 南京南瑞继保电气有限公司 | Method for one end of multi-end flexible direct-current power transmission system to exit from operation system |
| JP2017011916A (en) * | 2015-06-24 | 2017-01-12 | 株式会社日立製作所 | Multiterminal dc power transmission system |
| CN108879625A (en) * | 2018-07-19 | 2018-11-23 | 南京南瑞继保电气有限公司 | A kind of parallel connection multiterminal extra-high voltage direct-current transmission valve unit protection action processing method |
| CN108879753A (en) * | 2018-07-23 | 2018-11-23 | 南方电网科学研究院有限责任公司 | Extra-high voltage DC transmission system single valve group failure exits method, system and equipment |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111463762A (en) * | 2020-04-10 | 2020-07-28 | 中国南方电网有限责任公司 | Multi-terminal high-voltage direct-current power transmission system composite fault coordination handling method, device and terminal |
| CN111463762B (en) * | 2020-04-10 | 2022-08-05 | 中国南方电网有限责任公司 | Multi-terminal high-voltage direct-current power transmission system composite fault coordination handling method, device and terminal |
| CN111769526A (en) * | 2020-07-07 | 2020-10-13 | 北京四方继保自动化股份有限公司 | Valve group fault exit control method for extra-high voltage multi-terminal hybrid direct-current transmission system |
| WO2022135596A1 (en) * | 2020-12-25 | 2022-06-30 | 中国电力科学研究院有限公司 | Inter-polar power compensation control method for multi-infeed high voltage direct current weak system |
| CN115333098A (en) * | 2022-09-20 | 2022-11-11 | 中国南方电网有限责任公司超高压输电公司昆明局 | Method, device and equipment for sequential locking treatment of double valve banks of multi-terminal direct-current power transmission system |
| CN115333098B (en) * | 2022-09-20 | 2024-05-31 | 中国南方电网有限责任公司超高压输电公司昆明局 | Method, device and equipment for handling double valve group sequential locking of multi-terminal direct current transmission system |
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