CN112686772A - Method for determining flexible and straight transformation time sequence of multi-feed receiving-end power grid - Google Patents
Method for determining flexible and straight transformation time sequence of multi-feed receiving-end power grid Download PDFInfo
- Publication number
- CN112686772A CN112686772A CN202011473222.7A CN202011473222A CN112686772A CN 112686772 A CN112686772 A CN 112686772A CN 202011473222 A CN202011473222 A CN 202011473222A CN 112686772 A CN112686772 A CN 112686772A
- Authority
- CN
- China
- Prior art keywords
- direct current
- direct
- converter station
- transformation
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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]
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
Abstract
The invention discloses a method for determining flexible direct-current transformation time sequence of a multi-feed-in receiving-end power grid, which is characterized in that a linear weighting model is established on the basis of calculating a direct-current side evaluation index value, an alternating-current side evaluation index value and an economic evaluation index value after each conventional direct-current flexible direct-current transformation, a comprehensive weighting method is adopted to obtain a weight coefficient of each evaluation index, so that the comprehensive evaluation value of each conventional direct-current flexible direct-current transformation is calculated, and the flexible direct-current transformation of the conventional direct current is carried out according to the sequence of the comprehensive evaluation from high to low. The method has clear logic, convenient operation and strong practicability, and has important guiding significance for performing flexible and direct transformation on the conventional direct current engineering.
Description
Technical Field
The invention belongs to the technical field of power system planning, and particularly relates to a method for determining flexible and straight transformation time sequence of a multi-feed receiving-end power grid.
Background
The imbalance of energy distribution and load demand in China makes high-voltage direct-current transmission be vigorously developed. At present, 11 times of conventional direct current system feed-in is carried out on the east China power grid, and a typical multi-feed-in receiving-end power grid is formed; the structure of the whole receiving-end power grid becomes more complex due to the feeding-in of the multi-loop direct-current system, the safety and stability of the power grid are greatly threatened, multiple loops of direct current can be caused to simultaneously cause commutation failure or even direct-current locking due to serious alternating-current system faults, large-range power flow transfer of the receiving-end power grid is caused, the dynamic reactive power of the receiving-end power grid is further caused to be insufficient, and the voltage safety of the receiving-end power grid is threatened.
Compared with a conventional direct-current transmission system, the voltage source converter-based flexible direct-current transmission system (VSC-HVDC) has the advantages that no power grid commutation is needed, power can be supplied to a weak alternating-current system, active power and reactive power can be independently controlled, a reactive compensation device does not need to be additionally installed, commutation failure does not exist, and the like. Different from current source converter type high-voltage direct-current transmission based on a phase control commutation technology, a converter in flexible direct-current transmission is a voltage source converter, and the flexible direct-current transmission is mainly characterized in that a turn-off device (usually an IGBT) and a high-frequency modulation technology are adopted, and output active power and reactive power can be independently controlled by adjusting the amplitude of outlet voltage of the converter and the power angle difference between the outlet voltage of the converter and system voltage. Therefore, the mutual transmission of active power between two alternating current networks can be realized by controlling the converter stations at the two ends, and simultaneously, the converter stations at the two ends can independently adjust the reactive power absorbed or emitted by the converter stations respectively, so that the connected alternating current system is supported in a reactive mode.
In recent years, a high-capacity flexible direct-current transmission technology is rapidly developed, and the establishment and commissioning of the Zhangbei flexible direct-current demonstration project further mark that a flexible direct-current transmission system enters a high-capacity era; in the early conventional direct current transmission project, the operation age is long, the problem of equipment aging is serious, and system failure caused by equipment problems occurs occasionally, so that the development of related transformation is urgently needed.
The soft and direct transformation is carried out on the multi-feed receiving-end power grid, so that the interconnection among other conventional direct current systems can be weakened, and the risk of phase change failure caused by multiple direct currents due to the fault of an alternating current system is reduced; and the safety and stability of the receiving-end power grid can be improved by reasonably controlling the reactive power injected into the alternating current system in the dynamic process after the alternating current system fails by utilizing the dynamic reactive power characteristic of the flexible direct current converter station. Therefore, the flexible direct-current transmission system is a future development trend of multi-feed receiving-end power grids in China.
At present, research aiming at carrying out flexible and direct transformation on a conventional direct current transmission system mainly focuses on the aspects of a VSC converter station submodule topological structure, a system main wiring mode, a direct current line fault processing method and the like, safety and stability analysis of the system is only carried out on a transformed receiving-end power grid from the angles of a multi-feed effective short-circuit ratio and a power grid instability risk, an effective evaluation index is lacked for the improvement effect of receiving-end power grid bus voltage and the economy of flexible and direct transformation in a transient process, and a systematic research is lacked for a time sequence scheme for carrying out flexible and direct transformation on the multi-feed receiving-end power grid. Therefore, it is necessary to develop an effective design method for time-sequence scheme.
Disclosure of Invention
In view of the above, the invention provides a method for determining the flexible-direct transformation time sequence of a multi-feed receiving-end power grid from three aspects of a direct-current side evaluation index, an alternating-current side evaluation index and an economic evaluation index.
A method for determining the flexible and straight transformation time sequence of a multi-feed receiving-end power grid comprises the following steps:
(1) for any direct current converter station A in the multi-feed receiving end power grid system, calculating a direct current side evaluation index value F after flexible direct current transformationdc；
(2) Calculating an alternating current side evaluation index value F after the soft-direct transformation of the direct current converter station Aac；
(3) Calculating an economic evaluation index value F after the A flexible and direct transformation of the direct current converter stationec；
(4) According to Fdc、FacAnd FecCalculating a comprehensive score value of the DC convertor station A after flexible-direct transformation by adopting a comprehensive weighting method;
(5) and (4) according to the steps (1) to (4), performing traversal calculation to obtain the comprehensive score value of each direct current converter station in the system, and sequencing the score values from large to small to obtain the transformation time sequence of each direct current converter station of the system.
The multi-feed-in receiving-end power grid system is a regional power grid system for transmitting power from different energy bases to the same load center by a plurality of conventional direct currents.
Further, the specific implementation manner of the step (1) is as follows:
1.1 calculating the average multi-feed interaction factor F of the rest direct current converter stations in the system after the direct current converter station A is transformedmiif；
1.2 calculating the average multi-feed effective short-circuit ratio F of the rest direct current converter stations in the system after the direct current converter station A is transformedscr；
1.3 according to FmiifAnd FscrCalculating a direct current side evaluation index value F after the soft-direct transformation of the direct current converter station A by adopting a comprehensive weighting methoddc。
Further, the average multi-feed interaction factor F is calculated in said step 1.1miifThe method comprises the following steps: firstly, calculating multi-feed interaction factors among other direct current converter stations in the system through the following formula;
the average multi-feed interaction factor F is then calculated by the following formulamiif；
Wherein: MIIFjiFor a multi-feed interaction factor, delta V, between the jth DC converter station and the ith DC converter station in the systemiFor the voltage disturbance of the AC bus of the ith DC converter station, Δ VjThe voltage disturbance quantity of the AC bus of the jth DC converter station is i and j which are natural numbers, i is more than or equal to 1 and is less than or equal to n, j is more than or equal to 1 and is less than or equal to n, i is not equal to j and is not equal to k, n is the number of the DC converter stations in the system, and k is the serial number of the DC converter station A.
Further, the average multi-feed effective short-circuit ratio F is calculated in said step 1.2scrThe method comprises the following steps: firstly, calculating the multi-feed-in effective short-circuit ratio of the rest direct current converter stations in the system by the following formula;
then, the average multi-feed effective short circuit ratio F is calculated by the following formulascr；
Wherein: MIESCRiFor a multi-feed effective short-circuit ratio, S, of the ith DC converter station in the systemciFor three-phase short-circuit capacity, Q, of the i-th DC converter station AC busciRated reactive power, P, supplied to the AC filter and the parallel capacitor inside the ith DC converter stationdNiIs rated active power, P, of the ith DC converter stationdNjAnd the j and i are natural numbers, i is more than or equal to 1 and less than or equal to n, j is more than or equal to 1 and less than or equal to n, i is not equal to j is not equal to k, n is the number of the DC converter stations in the system, and k is the serial number of the DC converter station A.
Further, in the step (2), the AC side evaluation index value F is calculated by the following formulaac；
Wherein: m is an alternating current bus set covered by a system backbone network, M is the number of alternating current buses in the set M, q is any alternating current bus in the set M, K is an alternating current bus set with serious voltage disturbance (the voltage drop is less than 0.5p.u. after N-1 fault occurs) in a system before the transformation of a direct current converter station A, p is any alternating current bus in the set K, and U is a bus in the setBEpqTransforming the lowest voltage, U, of the bus p during the fault period of the front bus q for the DC converter station AAFpqFor the lowest voltage W of the bus p in the fault period of the bus q after the transformation of the direct current converter station ApIs a preset weighting factor for the bus p.
Further, in the step (3), the economic evaluation index value F is calculated by the following formulaec；
Wherein: svscIs the transport capacity of the dc converter station a.
Aiming at the application scene of performing flexible direct-current transformation on a multi-feed receiving-end power grid, the flexible direct-current transformation time sequence determination method can quickly and effectively determine a conventional direct-current engineering time sequence table for performing flexible direct-current transformation on the receiving-end power grid on the basis of considering the transient voltage improvement effect and the economy of the receiving-end power grid. Meanwhile, the method makes up the blank of the conventional flexible-direct transformation time sequence research, is simple and convenient to implement, has strong logicality, and has important guiding significance for flexible-direct transformation of the conventional direct current engineering.
Drawings
Fig. 1 is a schematic structural diagram of a typical four-feed receiving-end power grid system.
Fig. 2 is a schematic structural diagram of a power grid system after a conventional direct current DC1 is subjected to softening and straightening transformation.
Detailed Description
In order to more specifically describe the present invention, the following detailed description is provided for the technical solution of the present invention with reference to the accompanying drawings and the specific embodiments.
A typical four-feed receiving end grid system is shown in fig. 1, wherein A, B, C, D is the ac bus of each conventional dc converter station. Aiming at the receiving-end power grid, the method for determining the flexible and direct transformation time sequence of the multi-feed receiving-end power grid is adopted, and the specific steps are as follows:
(1) calculating direct current side evaluation index value F of each conventional direct current flexible direct current transformationdc。
1.1 calculating the average multi-feed interaction factor F of the rest conventional direct currents after each conventional direct current soft direct current transformationmiif(ii) a Taking the conventional DC1 softening and straightening transformation as an example, as shown in fig. 2, the specific calculation method is as follows:
first, the multi-feed interaction factor MIIF between the remaining conventional direct currents DC2, DC3, DC4 can be determined by the following formula:
in the formula: Δ ViThe voltage disturbance quantity of an alternating current bus of a converter station i is about 1%; Δ VjThe voltage variation of the ac bus of the converter station j is shown, where i, j is 2,3,4 and i is not equal to j.
The average multi-feed for the remaining conventional DC can then be calculated according to the following formulaFactor F of interactionmiif：
In the formula: n is the number of conventional direct currents, and in this example n is 4.
1.2 calculating the average multi-feed effective short circuit ratio F of the rest conventional direct currents after the conventional direct current soft direct current transformationscr(ii) a Taking the conventional direct current DC1 flexible direct transformation as an example, the specific calculation method is as follows:
first, the multi-feed effective short circuit ratio MIESCR between the remaining conventional direct currents DC2, DC3, DC4 can be determined by the following equation:
in the formula: sciThe three-phase short-circuit capacity of an alternating current bus of a converter station i is obtained; qciRated reactive power provided for an alternating current filter and a parallel capacitor inside the converter station i; pdNiFor rated DC power, P, of the converter station idNjIs the rated dc power of the converter station j.
Then, the average multi-feed effective short-circuit ratio F of the conventional dc can be calculated according to the following formulascr：
1.3 combining the two sub-indexes, calculating the direct current side evaluation index value F after the conventional direct current soft-direct transformation by adopting a comprehensive weighting methoddc。
The decision matrix X for each conventional dc soft dc reconstruction can be derived from the calculations of steps 1.1 and 1.2 as follows:
in the formula: x is the number ofi1And xi2Respectively representing the ith conventional DC softening and straightening transformation FmiifAnd FscrAn index value; the decision matrix X is normalized, Xi1Normalized by the following formula:
xi2normalized by the following formula:
wherein: x is the number ofjmin＝min{x1j,…,x4j}，xjmax＝max{x1j,...,x4j}，i＝1,2,3,4，j＝1,2。
The normalized decision matrix R is represented as:
the objective weight coefficient may be determined by:
the subjective weight coefficient may be determined by:
ω″1＝k1/(1+k1)
ω″2＝1/(1+k1)
in the formula: k is a radical of1Is an index FmiifRelative to the index FscrThe degree of importance of.
The integrated weight coefficient may be determined by:
ωj＝αω'j+(1-α)ω″j
direct current side evaluation index value F of ith conventional direct current softening and direct current transformationdciCan be determined by the following formula:
(2) carrying out N-1 fault simulation on 500kV lines of a backbone network, and calculating an alternating-current side evaluation index value F of each conventional direct-current flexible direct-current transformationacThe specific calculation formula is as follows:
in the formula: m represents the number of selected faulty lines, UBEjiRepresents the lowest voltage, U, of bus j during a fault of line i before the transformation of the flexibilizationAFjiThe lowest voltage of a bus j during the fault period of the line i after the flexible and direct transformation is shown, K is the bus number of the key bus of the receiving-end power grid, and WjIs the weighting factor for the bus j, which may typically take 1.0.
(3) Calculating the economic evaluation index value F of each conventional direct current flexible direct current transformationecThe specific calculation formula is as follows:
in the formula: svscThe transmission capacity of the flexible direct current transmission system VSC-HVDC is disclosed.
(4) And calculating a comprehensive score value F of each conventional direct current for performing softening and straightening transformation, and preferentially performing softening and straightening transformation on the conventional direct current according to the height of the comprehensive score.
The decision matrix X of each conventional direct current soft and direct transformation obtained by the calculation of the steps (1) to (3) is as follows:
in the formula: x is the number ofi1、xi2And xi3Respectively representing the ith conventional DC softening and straightening transformation Fdc、FacAnd FecAn index value; the decision matrix X is normalized, XijNormalized by the following formula:
wherein: x is the number ofjmin＝min{x1j,...,x4j}，xjmax＝max{x1j,...,x4j}，i＝1,2,3,4，j＝1,2。
The normalized decision matrix R is represented as:
the objective weight coefficient may be determined by:
the subjective weight coefficient may be determined by:
ω″1＝k1k2/(1+k2+k1k2)
ω″2＝k2/(1+k2+k1k2)
ω″3＝1/(1+k2+k1k2)
in the formula: k is a radical of1Is an index FdcRelative to the index FacDegree of importance of, k2Is an index FacRelative to the index FecDegree of importance of, k1、k2Can take 1.2 and 1.4 respectively.
The integrated weight coefficient may be determined by:
ωj＝αω'j+(1-α)ω″j
comprehensive score value F of ith conventional direct current soft and direct transformationiCan be determined by the following formula:
and finally, performing conventional direct current flexible direct current transformation according to the sequence of the comprehensive score from high to low.
The embodiments described above are presented to enable a person having ordinary skill in the art to make and use the invention. It will be readily apparent to those skilled in the art that various modifications to the above-described embodiments may be made, and the generic principles defined herein may be applied to other embodiments without the use of inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications to the present invention based on the disclosure of the present invention within the protection scope of the present invention.
Claims (8)
1. A method for determining the flexible and straight transformation time sequence of a multi-feed receiving-end power grid comprises the following steps:
(1) for any direct current converter station A in the multi-feed receiving end power grid system, calculating a direct current side evaluation index value F after flexible direct current transformationdc；
(2) Calculating an alternating current side evaluation index value F after the soft-direct transformation of the direct current converter station Aac；
(3) Calculating the A-softening and straightening of a DC converter stationModified economic evaluation index value Fec；
(4) According to Fdc、FacAnd FecCalculating a comprehensive score value of the DC convertor station A after flexible-direct transformation by adopting a comprehensive weighting method;
(5) and (4) according to the steps (1) to (4), performing traversal calculation to obtain the comprehensive score value of each direct current converter station in the system, and sequencing the score values from large to small to obtain the transformation time sequence of each direct current converter station of the system.
2. The method of claim 1, wherein: the specific implementation manner of the step (1) is as follows:
1.1 calculating the average multi-feed interaction factor F of the rest direct current converter stations in the system after the direct current converter station A is transformedmiif；
1.2 calculating the average multi-feed effective short-circuit ratio F of the rest direct current converter stations in the system after the direct current converter station A is transformedscr；
1.3 according to FmiifAnd FscrCalculating a direct current side evaluation index value F after the soft-direct transformation of the direct current converter station A by adopting a comprehensive weighting methoddc。
3. The method of claim 2, wherein: calculating the average multi-feed interaction factor F in said step 1.1miifThe method comprises the following steps: firstly, calculating multi-feed interaction factors among other direct current converter stations in the system through the following formula;
the average multi-feed interaction factor F is then calculated by the following formulamiif；
Wherein: MIIFjiIs a systemA multi-feed interaction factor, Δ V, between the jth DC converter station and the ith DC converter stationiFor the voltage disturbance of the AC bus of the ith DC converter station, Δ VjThe voltage disturbance quantity of the AC bus of the jth DC converter station is i and j which are natural numbers, i is more than or equal to 1 and is less than or equal to n, j is more than or equal to 1 and is less than or equal to n, i is not equal to j and is not equal to k, n is the number of the DC converter stations in the system, and k is the serial number of the DC converter station A.
4. The method of claim 2, wherein: calculating the average multi-feed effective short-circuit ratio F in said step 1.2scrThe method comprises the following steps: firstly, calculating the multi-feed-in effective short-circuit ratio of the rest direct current converter stations in the system by the following formula;
then, the average multi-feed effective short circuit ratio F is calculated by the following formulascr；
Wherein: MIESCRiFor a multi-feed effective short-circuit ratio, S, of the ith DC converter station in the systemciFor three-phase short-circuit capacity, Q, of the i-th DC converter station AC busciRated reactive power, P, supplied to the AC filter and the parallel capacitor inside the ith DC converter stationdNiIs rated active power, P, of the ith DC converter stationdNjAnd the j and i are natural numbers, i is more than or equal to 1 and less than or equal to n, j is more than or equal to 1 and less than or equal to n, i is not equal to j is not equal to k, n is the number of the DC converter stations in the system, and k is the serial number of the DC converter station A.
5. The method of claim 1, wherein: in the step (2), the AC side evaluation index value F is calculated by the following formulaac；
Wherein: m is an alternating current bus set covered by a system backbone network, M is the number of alternating current buses in the set M, q is any alternating current bus in the set M, K is an alternating current bus set with serious voltage disturbance in a system before the transformation of the direct current converter station A, p is any alternating current bus in the set K, UBEpqTransforming the lowest voltage, U, of the bus p during the fault period of the front bus q for the DC converter station AAFpqFor the lowest voltage W of the bus p in the fault period of the bus q after the transformation of the direct current converter station ApIs a preset weighting factor for the bus p.
6. The method of claim 1, wherein: in the step (3), the economic evaluation index value F is calculated by the following formulaec；
Wherein: svscIs the transport capacity of the dc converter station a.
7. The method of claim 1, wherein: according to the method, on the basis of calculating related evaluation index values, a linear weighting model is established, comprehensive grading values of conventional direct current flexible direct current transformation are calculated, and a conventional direct current engineering time sequence table for flexible direct current transformation of a receiving-end power grid is determined according to the height of the comprehensive grading values.
8. The method of claim 1, wherein: on the basis of considering the transient voltage improvement effect and the economy of the receiving-end power grid, the method can quickly and effectively determine the conventional direct-current engineering time sequence table for performing flexible direct-current transformation on the receiving-end power grid, simultaneously fills the blank of the conventional flexible direct-current transformation time sequence research, is simple and convenient to implement, has strong logicality, and has important guiding significance for performing flexible direct-current transformation on the conventional direct-current engineering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011473222.7A CN112686772B (en) | 2020-12-11 | 2020-12-11 | Method for determining flexible and straight transformation time sequence of multi-feed receiving-end power grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011473222.7A CN112686772B (en) | 2020-12-11 | 2020-12-11 | Method for determining flexible and straight transformation time sequence of multi-feed receiving-end power grid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112686772A true CN112686772A (en) | 2021-04-20 |
| CN112686772B CN112686772B (en) | 2022-07-19 |
Family
ID=75447766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011473222.7A Active CN112686772B (en) | 2020-12-11 | 2020-12-11 | Method for determining flexible and straight transformation time sequence of multi-feed receiving-end power grid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112686772B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113141022A (en) * | 2021-05-14 | 2021-07-20 | 国网湖北省电力有限公司电力科学研究院 | Alternating current-direct current series-parallel connection receiving end power grid structure optimization method |
| CN114050594A (en) * | 2021-11-04 | 2022-02-15 | 深圳供电局有限公司 | Method and system for obtaining conventional direct current conversion bus short-circuit ratio |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103345715A (en) * | 2013-07-04 | 2013-10-09 | 广东电网公司电力科学研究院 | Electrical equipment transformation method |
| CN104657550A (en) * | 2015-02-10 | 2015-05-27 | 吉林建筑大学 | Method for assessing reconstruction sequence of old city water supply pipelines |
| CN109378827A (en) * | 2018-10-26 | 2019-02-22 | 南方电网科学研究院有限责任公司 | Configure the method and system of Inverter Station dynamic passive compensation capacity |
| CN110071648A (en) * | 2019-04-29 | 2019-07-30 | 西南交通大学 | The progress control method of PWM rectifier in a kind of city rail traffic tractive power supply system |
| CN110460039A (en) * | 2019-07-11 | 2019-11-15 | 山东电力工程咨询院有限公司 | A kind of the connection plan recommended method and device of back pressure generator access electrical system |
| CN111178634A (en) * | 2019-12-31 | 2020-05-19 | 国网经济技术研究院有限公司 | Method and system for selecting power distribution network construction and transformation scheme |
| CN111898796A (en) * | 2020-06-16 | 2020-11-06 | 国网浙江省电力有限公司绍兴供电公司 | Method for optimizing reliability of multi-service converged power distribution network |
-
2020
- 2020-12-11 CN CN202011473222.7A patent/CN112686772B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103345715A (en) * | 2013-07-04 | 2013-10-09 | 广东电网公司电力科学研究院 | Electrical equipment transformation method |
| CN104657550A (en) * | 2015-02-10 | 2015-05-27 | 吉林建筑大学 | Method for assessing reconstruction sequence of old city water supply pipelines |
| CN109378827A (en) * | 2018-10-26 | 2019-02-22 | 南方电网科学研究院有限责任公司 | Configure the method and system of Inverter Station dynamic passive compensation capacity |
| CN110071648A (en) * | 2019-04-29 | 2019-07-30 | 西南交通大学 | The progress control method of PWM rectifier in a kind of city rail traffic tractive power supply system |
| CN110460039A (en) * | 2019-07-11 | 2019-11-15 | 山东电力工程咨询院有限公司 | A kind of the connection plan recommended method and device of back pressure generator access electrical system |
| CN111178634A (en) * | 2019-12-31 | 2020-05-19 | 国网经济技术研究院有限公司 | Method and system for selecting power distribution network construction and transformation scheme |
| CN111898796A (en) * | 2020-06-16 | 2020-11-06 | 国网浙江省电力有限公司绍兴供电公司 | Method for optimizing reliability of multi-service converged power distribution network |
Non-Patent Citations (1)
| Title |
|---|
| 何英静: "柔性直流输电系统对多直流馈入系统运行性能的改善作用研究", 《电力电容器与无功补偿》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113141022A (en) * | 2021-05-14 | 2021-07-20 | 国网湖北省电力有限公司电力科学研究院 | Alternating current-direct current series-parallel connection receiving end power grid structure optimization method |
| CN113141022B (en) * | 2021-05-14 | 2022-05-03 | 国网湖北省电力有限公司电力科学研究院 | Alternating current-direct current series-parallel connection receiving end power grid structure optimization method |
| CN114050594A (en) * | 2021-11-04 | 2022-02-15 | 深圳供电局有限公司 | Method and system for obtaining conventional direct current conversion bus short-circuit ratio |
| CN114050594B (en) * | 2021-11-04 | 2024-03-19 | 深圳供电局有限公司 | Method and system for obtaining short-circuit ratio of conventional direct-current converter bus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112686772B (en) | 2022-07-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108418255B (en) | Planning method and system suitable for extra-high voltage direct current outgoing power grid containing high-permeability new energy | |
| Hossain et al. | Design of robust distributed control for interconnected microgrids | |
| Li et al. | A coordination control strategy of voltage-source-converter-based MTDC for offshore wind farms | |
| CN112686772B (en) | Method for determining flexible and straight transformation time sequence of multi-feed receiving-end power grid | |
| CN107221945A (en) | A kind of UHVDC Transmission Lines forecast failure aid decision-making method and device | |
| CN107404119B (en) | Control method of electric vehicle load transfer system | |
| CN108808715B (en) | Multi-terminal flexible direct system static safety analysis method considering direct current network fault power | |
| CN107565594A (en) | Power ascension amount distribution method between more direct currents that consideration receiving end voltage deviation influences | |
| CN115733133A (en) | Load model simulation method and system based on distributed electrochemical energy storage | |
| CN113890039B (en) | Multi-terminal flexible direct-current power distribution network power flow scheduling optimization method | |
| CN113097995B (en) | Alternating current/direct current hybrid power distribution network optimization operation method considering multiple time scales | |
| CN110048427B (en) | Multi-end flexible direct-current power distribution network power flow protection constant value calculation method | |
| CN104993466A (en) | Cascading fault fast dynamic simulation method applicable to alternating current-direct current power grid | |
| CN107069747A (en) | A kind of minimum start-up mode based on regional voltage stabilization determines method | |
| CN108599226B (en) | True bipolar MMC-HVDC system line overload emergency control method | |
| CN116345448A (en) | Short-circuit current approximate calculation method for multi-terminal hybrid direct-current transmission system | |
| Rogersten et al. | A quantitative method for the assessment of VSC-HVdc controller simulations in EMT tools | |
| Torres-Olguin et al. | Grid Integration of offshore wind farms using a Hybrid HVDC composed by an MMC with an LCC-based transmission system | |
| CN112600260A (en) | Transient voltage sensitivity sequencing-based unit difference adjustment coefficient optimization method and device | |
| CN113300469A (en) | Distributed voltage control method of alternating current-direct current system considering control signal loss | |
| CN112117766A (en) | Safety constraint optimal power flow control method and system for alternating current-direct current hybrid power grid | |
| CN113659607A (en) | Reactive power control method of multi-converter-unit flexible direct-current transmission system | |
| Geetha et al. | Performance analysis of a voltage source converter HVDC system connected to an independent power generating station | |
| CN115986737B (en) | High-voltage direct-current VDCOL link optimization method based on simulated annealing algorithm | |
| CN112651128B (en) | Random optimization method for output and topological structure of unit of alternating current-direct current system |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |