CN114977204A - Static and dynamic reactive power configuration method and device for multi-direct-current feed-in power grid - Google Patents
Static and dynamic reactive power configuration method and device for multi-direct-current feed-in power grid Download PDFInfo
- Publication number
- CN114977204A CN114977204A CN202210642505.2A CN202210642505A CN114977204A CN 114977204 A CN114977204 A CN 114977204A CN 202210642505 A CN202210642505 A CN 202210642505A CN 114977204 A CN114977204 A CN 114977204A
- Authority
- CN
- China
- Prior art keywords
- power grid
- grid system
- power
- reactive power
- dynamic reactive
- 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.)
- Pending
Links
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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
-
- 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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1842—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters
-
- 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)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The application provides a static and dynamic reactive power configuration method and a static and dynamic reactive power configuration device for a multi-direct-current feed-in power grid, which relate to the field of power systems and are used for configuring static reactive power compensation of the power grid system by obtaining the static reactive power compensation of the power grid system; voltage reactive power disturbance checking is carried out on each converter station to determine that a first target station is provided with a dynamic reactive power compensation device; acquiring a multi-feed-in short-circuit ratio of a direct current converter station accessed to a power grid system, determining a second target station according to the multi-feed-in short-circuit ratio to check the transient state N-2, and adjusting the configuration of a dynamic reactive power compensation device; performing blocking fault check on direct current entering a power grid system and adjusting the configuration of a dynamic reactive power compensation device; and checking the short-circuit current of each converter station, adjusting the configuration of the dynamic reactive power compensation device until no converter station with the over-standard short-circuit current exists, and determining a static and dynamic reactive power configuration scheme of the multi-direct-current feed-in power grid. The static and dynamic reactive compensation configuration capacity and the installation position of the multi-direct-current feed-in power grid can be preliminarily judged, and reference judgment basis is provided for reasonable planning.
Description
Technical Field
The application relates to the field of power systems, in particular to a static and dynamic reactive configuration method and device for a multi-direct-current feed-in power grid.
Background
The dynamic reactive compensation is mainly used for improving the dynamic reactive support capability of a system, wherein the dynamic reactive compensation of a 220kV or above voltage class power grid is mainly used for providing dynamic reactive support in the transient process of the system, reducing the risk of feeding-in direct current commutation failure and improving the voltage stability level of the power grid. The dynamic reactive power equipment can quickly send out reactive power under the fault condition, supports the voltage of the system and is favorable for the stability of a multi-direct-current feed-in system.
Disclosure of Invention
The present application is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, an object of the present application is to provide a static and dynamic reactive power configuration method for a multiple dc feed-in power grid, by obtaining a static reactive power compensation configuration of a power grid system; performing voltage reactive power disturbance checking on each converter station of the power grid system to check whether the reactive voltage of the power grid meets the operation requirement, determining a first target station based on the reactive response degree of each converter station in response to the fact that the reactive voltage of the power grid meets the operation requirement, and configuring a dynamic reactive power compensation device at the first target station; acquiring a multi-feed-in short-circuit ratio of a direct current converter station accessed to a power grid system, determining a second target station according to the multi-feed-in short-circuit ratio, and performing transient N-2 check on the second target station to determine whether a weak link of dynamic reactive power support exists in the power grid system, and if so, adjusting the configuration of a dynamic reactive power compensation device until the weak link of dynamic reactive power support does not exist; performing blocking fault check on direct current entering a power grid system, determining whether a weak link of dynamic reactive power support exists in the power grid system, and if so, adjusting the configuration of a dynamic reactive power compensation device until the weak link of dynamic reactive power support does not exist; and checking short-circuit current of each converter station of the power grid system, determining whether the power grid system has the converter station with the short-circuit current exceeding the standard, if so, adjusting the configuration of the dynamic reactive power compensation device until the converter station with the short-circuit current exceeding the standard does not exist, and if not, determining a static and dynamic reactive power configuration scheme of the multi-direct-current feed-in power grid.
The static and dynamic reactive power configuration method applicable to the multi-direct-current feed-in power grid can preliminarily judge the static and dynamic reactive power compensation configuration capacity and the installation position of the multi-direct-current feed-in power grid, and provides a reference judgment basis for reasonably planning the static and dynamic reactive power configuration and other problems of the multi-direct-current feed-in power grid.
A second objective of the present application is to provide a static and dynamic reactive configuration device for multiple dc feeds into a power grid, including: the acquisition module is used for acquiring the static reactive power compensation configuration of the power grid system; the reactive power disturbance checking module is used for performing voltage reactive power disturbance checking on each converter station of the power grid system to check whether the reactive voltage of the power grid meets the operation requirement, if the reactive voltage of the power grid meets the operation requirement, a first target station is determined based on the reactive power response degree of each converter station, and a dynamic reactive power compensation device is configured at the first target station; the transient state checking module is used for acquiring a multi-feed-in short circuit ratio of a direct current converter station accessed to the power grid system, determining a second target station according to the multi-feed-in short circuit ratio, performing transient state N-2 checking on the second target station to determine whether a weak link of the dynamic reactive power support exists in the power grid system, and if so, adjusting the configuration of the dynamic reactive power compensation device until the weak link of the dynamic reactive power support does not exist; the locking fault checking module is used for checking locking faults of direct current entering the power grid system, determining whether the power grid system has a weak link of dynamic reactive power support, and if so, adjusting the configuration of the dynamic reactive power compensation device until the weak link of the dynamic reactive power support does not exist; and the short-circuit current checking module is used for checking the short-circuit current of each converter station of the power grid system, determining whether the converter station with the over-standard short-circuit current exists in the power grid system, if so, adjusting the configuration of the dynamic reactive power compensation device until the converter station with the over-standard short-circuit current does not exist, and if not, determining a static and dynamic reactive power configuration scheme of the multi-direct-current feed-in power grid.
A third object of the present application is to provide an electronic device, comprising: at least one processor; and a memory communicatively coupled to the at least one processor; the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to implement the static and dynamic reactive power configuration method for multiple direct current fed power grids according to the embodiment of the first aspect of the present application.
A fourth object of the present application is to provide a non-transitory computer-readable storage medium storing computer instructions for implementing the method for configuring static and dynamic reactive power of a multiple dc feed grid as embodied in the first aspect of the present application.
A fifth object of the present application is to propose a computer program product, comprising a computer program, which when executed by a processor, implements the method for static and dynamic reactive configuration of a multiple direct current feed grid as embodied in the first aspect of the present application.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flowchart of a static and dynamic reactive configuration method for a multiple dc feed power grid according to an embodiment of the present application.
Fig. 2 is a schematic diagram of a static and dynamic reactive configuration method of a multiple dc feed power grid according to an embodiment of the present application.
Fig. 3 is a schematic diagram of a static and dynamic reactive configuration device of a multiple dc feed power grid according to an embodiment of the present application.
Fig. 4 is a schematic diagram of an electronic device according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present application and should not be construed as limiting the present application.
Fig. 1 is an exemplary implementation of a static and dynamic reactive configuration method for a multiple dc feed-in power grid according to an embodiment of the present application, where the static and dynamic reactive configuration method for the multiple dc feed-in power grid, as shown in fig. 1, includes the following steps:
and S101, obtaining static reactive compensation configuration of the power grid system.
In order to reduce the transmission loss of reactive power and improve the efficiency of power transmission and distribution equipment, the configuration of reactive compensation equipment needs to be performed on a power grid system, and before the configuration of the reactive compensation equipment is performed on the power grid system, the static reactive compensation configuration of the power grid system needs to be acquired.
Illustratively, when static reactive compensation configuration of a power grid system is obtained, research data of the power grid system can be set up, transient N-1 stability checking is carried out on the power grid system based on the research data, a transient N-1 stability checking result is obtained, the research data is adjusted based on the checking result until the stability requirement of the power grid system is met, the requirement of the power grid system on the static reactive compensation is determined through reactive balance analysis, and the static reactive compensation configuration is carried out on the power grid system according to the principle of layered partition balance.
In this application, the total reactive compensation capacity Q of the grid system Supplement device The calculation formula is as follows:
Q supplement device ＝Q Static state +Q Dynamic state
In the formula, Q Supplement device To total reactive compensation capacity, Q Static state For static reactive compensation capacity, Q Dynamic state Is dynamic reactive compensation capacity.
S102, voltage reactive power disturbance checking is carried out on each converter station of the power grid system to check whether the reactive voltage of the power grid meets the operation requirement, if the reactive voltage of the power grid meets the operation requirement, a first target station is determined based on the reactive response degree of each converter station, and a dynamic reactive power compensation device is configured at the first target station.
After static reactive power compensation configuration is carried out on the power grid system, voltage reactive power disturbance checking is carried out on each converter station of the power grid system so as to check whether the reactive voltage of the power grid meets the operation requirement.
If the reactive voltage of the power grid meets the operation requirement, a first target station is determined based on the reactive response degree of each converter station, and dynamic reactive compensation devices such as a phase modulator, a Static Var Compensator (SVC), a Static Synchronous Compensator (STATC Synchronous Compensator, STATCOM or SVG) and the like are configured at the first target station.
For example, when the first target station is determined based on the reactive response degree of each converter station, reactive voltage action factors of each converter station may be obtained, the reactive voltage action factors are sorted from large to small, and the first N converter stations are selected as the first target station. Optionally, the value of N may be 5, that is, 5 converter stations are selected to configure dynamic reactive power compensation devices such as a phase modulator, an SVC, and a STATCOM (SVG). The reactive voltage action factor is used for reflecting the reactive response degree of the converter station.
When the reactive response degree of each converter station to the reactive power is obtained, the reactive compensation configuration of the introduced converter station I is used for configuring the reactive voltage action factor I of the converter station j ji The calculation formula is as follows:
in the formula I ji Is reactive voltage action factor, i is self-disturbance bus, j is observation bus, Δ S i The reactive disturbance quantity of the AC bus of the converter station is about 1 percent, delta U j The voltage variation of the ac bus for converter station j.
S103, acquiring a multi-feed-in short-circuit ratio of a direct current converter station accessed to the power grid system, determining a second target station according to the multi-feed-in short-circuit ratio, performing transient N-2 checking on the second target station to determine whether a weak link of the dynamic reactive power support exists in the power grid system, and if so, adjusting the configuration of the dynamic reactive power compensation device until the weak link of the dynamic reactive power support does not exist.
Acquiring the multi-feed short-circuit ratio of a direct current converter station accessed to a power grid system, and introducing a multi-feed interaction factor I of a converter station I to a converter station j MIIFji The calculation formula is as follows:
in the formula, i is a self-disturbance bus, j is an observation bus, and delta U i The voltage disturbance amount of the AC bus of the converter station i is about 1 percent, delta U j The voltage variation of the ac bus for converter station j.
Wherein, I MIIFji The degree of mutual coupling between the ac busbars of the converter station is described.
Multiple feed-in short-circuit ratio I of converter station I MIESCRi Meter for measuringThe calculation formula is as follows:
in the formula, S ci For three-phase short-circuit capacity, Q, of the AC busbar of the converter station i cNi Reactive power provided by an AC filter and a parallel capacitor in a converter station when the AC bus voltage of the converter station is rated, I MIIFji For multiple feed interaction factors, P, of converter station i to converter station j dcNi And the rated power of the ith return direct current transmission line is obtained.
After the multi-feed short-circuit ratios of the direct current converter stations accessed to the power grid system are determined, the multi-feed short-circuit ratios are sequenced from small to large, M converter stations with the lowest multi-feed short-circuit ratios are used as second target stations, wherein the M value can be the same as or different from the N value, and if the M value is the same as the N value, namely the M value is 5, transient N-2 checking is performed on the selected 5 second target stations to determine whether a weak link of dynamic reactive power support exists in the power grid system. And if the weak link of the dynamic reactive power support exists, adjusting the configuration of dynamic reactive power compensation devices such as a phase modulator, an SVC (static var compensator), an STATCOM (SVG) and the like until the weak link of the dynamic reactive power support does not exist.
And S104, performing blocking fault check on the direct current entering the power grid system, determining whether the power grid system has a weak link of the dynamic reactive power support, and if so, adjusting the configuration of the dynamic reactive power compensation device until the weak link of the dynamic reactive power support does not exist.
And (3) carrying out blocking fault check on the direct current entering the power grid system, determining whether the power grid system has a weak link of the dynamic reactive power support, and if so, adjusting the configuration of dynamic reactive power compensation devices such as a phase modulator, an SVC (static var compensator), an STATCOM (SVG) and the like until the weak link of the dynamic reactive power support does not exist.
And S105, carrying out short-circuit current check on each converter station of the power grid system, determining whether the power grid system has the converter station with the over-standard short-circuit current, if so, adjusting the configuration of the dynamic reactive power compensation device until the converter station with the over-standard short-circuit current does not exist, and if not, determining a static and dynamic reactive power configuration scheme of the multi-direct-current feed-in power grid.
Carrying out short-circuit current check on each converter station of a power grid system, determining whether the power grid system has a station with the standard-exceeding short-circuit current, and if the converter station with the standard-exceeding short-circuit current exists, adjusting the configuration of dynamic reactive power compensation devices such as a phase modulator, an SVC (static var compensator), an STATCOM (static var compensator) (SVG) and the like until the converter station with the standard-exceeding short-circuit current does not exist so as to obtain a static and dynamic reactive power configuration scheme of the multi-direct-current feed-in power grid; and if the converter station with the over-standard short-circuit current does not exist, directly determining a static and dynamic reactive power configuration scheme of the multi-direct-current feed-in power grid.
The static and dynamic reactive power configuration method applicable to the multi-direct-current feed-in power grid can preliminarily judge the static and dynamic reactive power compensation configuration capacity and the installation position of the multi-direct-current feed-in power grid, and provides a reference judgment basis for reasonably planning the static and dynamic reactive power configuration and other problems of the multi-direct-current feed-in power grid.
Further, in step S102, voltage reactive power disturbance checking is performed on each converter station of the grid system to check whether the grid reactive voltage meets the operation requirement, and if the grid reactive voltage does not meet the operation requirement, the configuration of the static reactive power compensation capacity is modified until the operation requirement is met, and then a first target station is determined based on the reactive power response degree of each converter station, and a dynamic reactive power compensation device is configured at the first target station.
Further, after performing transient N-2 checking at the second target site to determine whether the power grid system has a weak link of dynamic reactive power support in step S103, if the power grid system does not have a weak link of dynamic reactive power support, step S104 is directly performed.
Further, after the dc power of the power grid system is checked for blocking faults in step S104 and it is determined whether there are other weak links of the dynamic reactive power support in the power grid system, if there are no weak links of the dynamic reactive power support in the power grid system, step S105 is directly executed.
Fig. 2 is an exemplary schematic diagram of a static and dynamic reactive configuration method for a multiple direct-current feed-in power grid shown in an embodiment of the present application, and as shown in fig. 2, in the process of obtaining the static and dynamic reactive configuration method for the multiple direct-current feed-in power grid, power grid research data needs to be set up, transient N-1 stability checking is performed based on the power grid research data, whether a power grid system meets a stability requirement is judged based on a checking result, and if the power grid system meets the stability requirement, static reactive compensation configuration is performed; and if the power grid system does not meet the stability requirement, modifying the power grid research data until the power grid system meets the stability requirement, and performing static reactive compensation configuration.
As shown in fig. 2, after static reactive power compensation configuration is performed, it is determined whether reactive voltage in a power grid system meets an operation requirement, if the reactive voltage meets the operation requirement, voltage reactive power disturbance checking is performed on each site of the power grid, sequencing is performed according to reactive power response degrees of each site, and configuration of dynamic reactive power compensation devices such as a phase modulator, an SVC, and a STATCOM (SVG) is performed at 5 sites with the largest response; and if the reactive voltage does not meet the operation requirement, modifying the static reactive compensation configuration until the reactive voltage meets the operation requirement.
As shown in fig. 2, after the configuration of dynamic reactive power compensation devices such as a phase modulator, an SVC, and a STATCOM (SVG) is performed, a preliminary configuration of the dynamic reactive power compensation device is obtained, a multi-feed short-circuit ratio calculation is performed on a dc converter station connected to a power grid, a multi-feed short-circuit ratio is obtained according to a calculation result, 5 stations with the lowest ratio are selected to perform transient N-2 verification, whether a weak link of a dynamic reactive power support exists in the power grid system is determined, and if the weak link of the dynamic reactive power support exists in the power grid system, the configuration of the dynamic reactive power compensation devices such as the phase modulator, the SVC, and the STATCOM (SVG) is adjusted until the weak link of the dynamic reactive power support does not exist; and if the power grid system does not have the weak link of the dynamic reactive power support, directly entering direct current blocking fault checking.
As shown in fig. 2, when the dc blocking fault is checked for the power grid system, according to the check result, it is determined whether the power grid system has other weak links of the dynamic reactive power support, and if the power grid system has the weak links of the dynamic reactive power support, the configurations of dynamic reactive power compensation devices such as a phase modulator, an SVC, and a STATCOM (SVG) are adjusted until the weak links of the dynamic reactive power support do not exist; and if the power grid system does not have the weak link of the dynamic reactive power support, directly entering short-circuit current check.
As shown in fig. 2, when the short-circuit current of the power grid system is checked, according to the checking result, it is determined whether the power grid system has a station with an excessive short-circuit current, and if the station with the excessive short-circuit current exists, the configurations of dynamic reactive power compensation devices such as a phase modulator, an SVC, and a STATCOM (SVG) are adjusted until the station with the excessive short-circuit current does not exist; and if the power grid system does not have a station with the short-circuit current exceeding the standard, acquiring a static and dynamic reactive comprehensive configuration scheme of the multi-direct-current feed-in power grid.
Fig. 3 is a schematic diagram of a static and dynamic reactive configuration device of a multiple dc feed power grid shown in the present application, and as shown in fig. 3, the static and dynamic reactive configuration device 300 of the multiple dc feed power grid includes: the acquisition module 31, the reactive power disturbance checking module 32, the transient checking module 33, the blocking fault checking module 34, and the short-circuit current checking module 35, wherein:
and the obtaining module 31 is configured to obtain a static reactive compensation configuration of the power grid system.
And the reactive power disturbance checking module 32 is configured to perform voltage reactive power disturbance checking on each converter station of the power grid system to check whether the reactive voltage of the power grid meets the operation requirement, determine a first target station based on the reactive response degree of each converter station if the reactive voltage of the power grid meets the operation requirement, and configure a dynamic reactive power compensation device at the first target station.
The transient checking module 33 is configured to obtain a multi-feed short-circuit ratio of a dc converter station connected to the power grid system, determine a second target site according to the multi-feed short-circuit ratio, perform transient N-2 checking on the second target site, and determine whether a weak link of the dynamic reactive power support exists in the power grid system, and if the weak link of the dynamic reactive power support does not exist, adjust the configuration of the dynamic reactive power compensation device until the weak link of the dynamic reactive power support does not exist.
And the blocking fault checking module 34 is used for checking blocking faults of direct current entering the power grid system, determining whether the power grid system has a weak link of the dynamic reactive power support, and if so, adjusting the configuration of the dynamic reactive power compensation device until the weak link of the dynamic reactive power support does not exist.
And the short-circuit current checking module 35 is configured to perform short-circuit current checking on each converter station of the power grid system, determine whether the power grid system has a converter station with an excessive short-circuit current, adjust the configuration of the dynamic reactive power compensation device until no converter station with an excessive short-circuit current exists, and determine a static and dynamic reactive power configuration scheme of the multi-direct-current feed-in power grid if no converter station with an excessive short-circuit current exists.
Further, the obtaining module 31 is further configured to: building research data of a power grid system; transient N-1 stability checking is carried out on the power grid system, and research data are adjusted based on a checking result until the stability requirement of the power grid system is met; and determining the requirement of the power grid system on static reactive compensation through reactive balance analysis, and performing static reactive compensation configuration on the power grid system according to the principle of layered and partitioned balance.
Further, the reactive disturbance checking module 32 is further configured to: and in response to the reactive voltage of the power grid not meeting the operation requirement, modifying the configuration of the static reactive compensation capacity until the operation requirement is met and executing the subsequent steps.
Further, the transient checking module 33 is further configured to: and responding to the fact that the power grid system does not have the weak link of the dynamic reactive power support, and performing locking fault check and subsequent steps on the direct current of the power grid system.
Further, the lockout fault checking module 34 is further configured to: and in response to the fact that the power grid system does not have a weak link of the dynamic reactive power support, performing short-circuit current checking and subsequent steps on each converter station of the power grid system.
Further, the reactive disturbance checking module 32 is further configured to: obtaining reactive voltage action factors of each converter station, wherein the reactive voltage action factors are used for reflecting the reactive response degree of the converter stations; and sequencing reactive voltage action factors according to a descending order, and selecting the first N converter stations as first target stations.
Further, the transient checking module 33 is further configured to: acquiring the multi-feed-in short-circuit ratio of each converter station; and sequencing the multi-feed short circuit ratios from small to large, and selecting the first M converter stations as second target stations.
In order to implement the foregoing embodiments, an embodiment of the present application further provides an electronic device 400, as shown in fig. 4, where the electronic device 400 includes: a processor 401 and a memory 402 communicatively coupled to the processor, the memory 402 storing instructions executable by the at least one processor, the instructions being executable by the at least one processor 401 to implement the method for configuring static and dynamic reactive power of a multiple direct current fed grid as described in the above embodiments.
In order to implement the foregoing embodiments, the present application further provides a non-transitory computer-readable storage medium storing computer instructions, where the computer instructions are configured to enable a computer to implement the static and dynamic reactive power configuration method for a multiple direct current feeding grid as shown in the foregoing embodiments.
In order to implement the foregoing embodiments, the present application further provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the computer program implements the static and dynamic reactive power configuration method for a multiple direct current fed power grid as shown in the foregoing embodiments.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means 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 application. 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.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. A static and dynamic reactive power configuration method of a multi-direct current feed-in power grid is characterized by comprising the following steps:
obtaining static reactive compensation configuration of a power grid system;
performing voltage reactive power disturbance checking on each converter station of the power grid system to check whether the reactive voltage of the power grid meets the operation requirement, determining a first target station based on the reactive response degree of each converter station in response to the fact that the reactive voltage of the power grid meets the operation requirement, and configuring a dynamic reactive power compensation device at the first target station;
acquiring a multi-feed-in short-circuit ratio of a direct current converter station accessed to the power grid system, determining a second target station according to the multi-feed-in short-circuit ratio, performing transient N-2 check on the second target station to determine whether a weak link of dynamic reactive power support exists in the power grid system, and if so, adjusting the configuration of the dynamic reactive power compensation device until the weak link of dynamic reactive power support does not exist;
performing blocking fault check on direct current accessed to the power grid system, determining whether a weak link of dynamic reactive power support exists in the power grid system, and if so, adjusting the configuration of the dynamic reactive power compensation device until the weak link of dynamic reactive power support does not exist;
and checking short-circuit current of each converter station of the power grid system, determining whether the power grid system has converter stations with over-standard short-circuit current, if so, adjusting the configuration of the dynamic reactive power compensation device until no converter stations with over-standard short-circuit current exist, and if not, determining a static and dynamic reactive power configuration scheme of the multi-direct-current feed-in power grid.
2. The method of claim 1, wherein obtaining the static reactive compensation configuration for the grid system comprises:
building research data of a power grid system;
performing transient N-1 stability checking on the power grid system, and adjusting the research data based on a checking result until the stability requirement of the power grid system is met;
and determining the requirement of the power grid system on static reactive compensation through reactive balance analysis, and performing static reactive compensation configuration on the power grid system according to the principle of layered and partitioned balance.
3. The method according to claim 2, wherein after the performing voltage reactive power disturbance checking on each converter station of the grid system to check whether the grid reactive voltage meets the operation requirement, the method further comprises:
and in response to the reactive voltage of the power grid not meeting the operation requirement, modifying the configuration of the static reactive compensation capacity until the operation requirement is met and executing the subsequent steps.
4. The method of claim 3, wherein after performing a transient N-2 check at the second target site to determine whether a weak link of dynamic reactive support exists in the grid system, further comprising:
and responding to the fact that the power grid system does not have the weak link of the dynamic reactive power support, and performing blocking fault check and subsequent steps on the direct current accessed to the power grid system.
5. The method of claim 4, wherein after performing blocking fault checking on the direct current accessed to the power grid system and determining whether other weak links of the dynamic reactive power support exist in the power grid system, the method further comprises:
and in response to the fact that the power grid system does not have the weak link of the dynamic reactive power support, performing short-circuit current checking and subsequent steps on each converter station of the power grid system.
6. The method of claim 1, wherein determining the first target site based on the reactive power response of each converter station comprises:
obtaining reactive voltage action factors of each converter station, wherein the reactive voltage action factors are used for reflecting the reactive response degree of the converter stations;
and sequencing the reactive voltage action factors in a descending order, and selecting the first N converter stations as first target stations.
7. The method according to claim 1, wherein the obtaining a multi-feed short-circuit ratio of a dc converter station accessing the grid system, and determining a second target station according to the multi-feed short-circuit ratio comprises:
acquiring the multi-feed-in short-circuit ratio of each converter station;
and sequencing the multi-feed-in short circuit ratios from small to large, and selecting the first M converter stations as second target stations.
8. A static and dynamic reactive power configuration device for a multi-direct current feed-in power grid is characterized by comprising:
the acquisition module is used for acquiring the static reactive compensation configuration of the power grid system;
the reactive power disturbance checking module is used for performing voltage reactive power disturbance checking on each converter station of the power grid system to check whether the reactive voltage of the power grid meets the operation requirement, if the reactive voltage of the power grid meets the operation requirement, determining a first target station based on the reactive power response degree of each converter station, and configuring a dynamic reactive power compensation device at the first target station;
the transient state checking module is used for acquiring a multi-feed-in short-circuit ratio of a direct current converter station accessed to the power grid system, determining a second target station according to the multi-feed-in short-circuit ratio, performing transient state N-2 checking on the second target station to determine whether a weak link of dynamic reactive power support exists in the power grid system, and if so, adjusting the configuration of the dynamic reactive power compensation device until the weak link of dynamic reactive power support does not exist;
the blocking fault checking module is used for checking blocking faults of direct current accessed to the power grid system, determining whether the power grid system has a weak link of dynamic reactive power support, and if so, adjusting the configuration of the dynamic reactive power compensation device until the weak link of dynamic reactive power support does not exist;
and the short-circuit current checking module is used for checking the short-circuit current of each converter station of the power grid system, determining whether the power grid system has the converter station with the exceeding short-circuit current, if so, adjusting the configuration of the dynamic reactive power compensation device until the converter station with the exceeding short-circuit current does not exist, and if not, determining a static and dynamic reactive power configuration scheme of the multi-direct-current feed-in power grid.
9. An electronic device, comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein, the first and the second end of the pipe are connected with each other,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-7.
10. A non-transitory computer readable storage medium having stored thereon computer instructions for causing the computer to perform the method of any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210642505.2A CN114977204A (en) | 2022-06-08 | 2022-06-08 | Static and dynamic reactive power configuration method and device for multi-direct-current feed-in power grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210642505.2A CN114977204A (en) | 2022-06-08 | 2022-06-08 | Static and dynamic reactive power configuration method and device for multi-direct-current feed-in power grid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114977204A true CN114977204A (en) | 2022-08-30 |
Family
ID=82962598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210642505.2A Pending CN114977204A (en) | 2022-06-08 | 2022-06-08 | Static and dynamic reactive power configuration method and device for multi-direct-current feed-in power grid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114977204A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024093152A1 (en) * | 2022-11-03 | 2024-05-10 | 浙江大学 | Distributed voltage clamping method for 100%-new-energy sending-end power grid |
-
2022
- 2022-06-08 CN CN202210642505.2A patent/CN114977204A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024093152A1 (en) * | 2022-11-03 | 2024-05-10 | 浙江大学 | Distributed voltage clamping method for 100%-new-energy sending-end power grid |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Haque et al. | A review of high PV penetrations in LV distribution networks: Present status, impacts and mitigation measures | |
| CN103094905B (en) | Selection method of dynamic reactive power compensation configuration point | |
| CN108400609B (en) | Method for suppressing multi-feed-in direct current commutation failure site selection suitable for phase modulator | |
| CN102403716A (en) | Dynamic equalizing method for multi-infeed alternating/direct-current power grid | |
| CN110138002B (en) | Offshore wind power reactive power configuration method and device, computer equipment and storage medium | |
| CN113381445A (en) | Phase modulator optimal configuration method and system for restraining transient overvoltage of new energy | |
| CN114977204A (en) | Static and dynamic reactive power configuration method and device for multi-direct-current feed-in power grid | |
| CN103078329B (en) | Output reactive compensation analysis method for long-distance 200kV submarine cable of offshore wind plant | |
| Ismail et al. | Analytical approaches on optimal placement of STATCOM under contingency occasions | |
| CN106451446A (en) | Constant volume method of urban power grid district-dividing interconnection device based on flexible direct current technology | |
| CN106845852B (en) | Voltage stability evaluation fault set forming method for multi-direct current feed-in receiving end alternating current system | |
| CN108964120A (en) | Low pressure distributed photovoltaic access capacity optimal control method | |
| CN105262077A (en) | Control method for optimizing power flow of direct-current distribution network | |
| CN109726482B (en) | Construction method and related device of high-load-density power grid | |
| CN113852142B (en) | Multi-voltage-level static and dynamic reactive power configuration method for multi-direct-current feed-in power grid | |
| CN105846447B (en) | Multiple-circuit line Inverter Station dynamic passive compensation configures the determination method of order of priority | |
| Shinde et al. | Investigation of effects of solar photovoltaic penetration in an IEEE 13-bus radial low-voltage distribution feeder system | |
| CN111030160B (en) | Method and device for evaluating distributed power supply accepting capacity of power distribution network | |
| Rabbi et al. | Performance comparison of STATCOM and BESS for restoring voltage under post fault scenario | |
| CN111668815B (en) | Method and system for determining distance protection fixed value of alternating current power system | |
| CN205212429U (en) | Optimize control system of DC distribution net trend | |
| CN110148968A (en) | Photovoltaic DC grid-connected system fault recovery control method | |
| Li et al. | Power-quality of distribution networks with high penetrated intermittent distributed generation: A survey | |
| Perera et al. | Distributed DSTATCOMs for distribution line enhancement | |
| Alayande et al. | Power quality considerations for distributed generation integration in the nigerian distribution network using neplan software |
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 |