CN110556813A - high-reliability operation mode switching method for direct-current power distribution system - Google Patents
high-reliability operation mode switching method for direct-current power distribution system Download PDFInfo
- Publication number
- CN110556813A CN110556813A CN201910786718.0A CN201910786718A CN110556813A CN 110556813 A CN110556813 A CN 110556813A CN 201910786718 A CN201910786718 A CN 201910786718A CN 110556813 A CN110556813 A CN 110556813A
- Authority
- CN
- China
- Prior art keywords
- distribution system
- direct current
- power distribution
- current power
- mode
- 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
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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
-
- 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]
Abstract
The invention provides a method for switching high-reliability operation modes of a direct-current power distribution system. The method realizes the rapid and smooth switching of the operation modes of each controllable device in the direct current power distribution system so as to meet the current topological structure or operation state of the system, improves the power supply reliability of the load in the direct current power distribution system, and ensures the long-term stable work of the direct current power distribution system.
Description
Technical Field
the invention relates to the technical field of electric power, in particular to a high-reliability operation mode switching method for a direct-current power distribution system.
Background
In contrast to the ac distribution network concept, there is also a dc distribution network. The direct-current distribution network provides a direct-current bus for the load, and the direct-current load can be directly supplied with power by the direct-current bus; and the alternating current load needs to be supplied with power after passing through the inverter equipment. If the proportion of the direct current load in the load is larger, the direct current distribution has larger advantages. Compared with an alternating-current power distribution network, the direct-current power distribution network has the advantages of small line loss, high reliability, no need of phase-frequency control and strong distributed power supply accepting capability.
With the wide application of the dc power distribution technology, the research on the dc power distribution system is also increasingly intensive. The direct current distribution system exchanges energy with the alternating current distribution system through the current converter, the voltage source current converters of all ports in the direct current system can supply power to the system, and the rest voltage source current converters can maintain the normal operation of the direct current system when the voltage source current converters at one end or two ends of the direct current system quit the operation. The Voltage Source Converter (VSC) is a converter composed of devices with turn-off capability. Line disconnection and partially controllable equipment exiting operation in a dc power distribution system may result in a change of operation mode. If the direct current distribution system cannot rapidly, accurately and reliably switch the operation modes, the damage of power electronic equipment can be caused, and even the whole direct current distribution system cannot work normally.
Disclosure of Invention
The invention provides a high-reliability operation mode switching method for a direct-current power distribution system, which aims to solve the problem of operation mode switching of the direct-current power distribution system in the prior art.
A high-reliability operation mode switching method for a direct current power distribution system comprises the following steps:
Dividing the operation mode of a direct current power distribution system into a three-terminal power supply mode, a two-terminal isolation mode, a two-terminal power supply mode, a single-terminal power supply mode and a STATCOM mode;
The direct current power distribution system is freely switched among different operation modes according to the change of the topological structure.
Further, the freely switching the direct current power distribution system between different operation modes comprises:
When the direct current power distribution system in a three-terminal power supply mode has a T-connection line fault, the direct current power distribution system is automatically switched to a two-terminal isolation mode, or the T-connection line fault in the direct current power distribution system is recovered, and the direct current power distribution system is automatically switched back to the three-terminal power supply mode from the two-terminal isolation mode; and/or
When any voltage source converter in the direct current power distribution system in a three-terminal power supply mode quits operation, and the other voltage source converters work normally, the operation mode of the direct current power distribution system is automatically switched to a two-terminal power supply mode, or the voltage source converter quitting operation in the direct current power distribution system recovers operation, and the direct current power distribution system is automatically switched back to the three-terminal power supply mode from the two-terminal power supply mode; and/or
Any two voltage source converters in the direct current power distribution system in the three-terminal power supply mode quit operation, only one voltage source converter is left to work normally, the direct current power distribution system is automatically switched into the single-terminal power supply mode, or the two voltage source converters quitting operation in the direct current power distribution system are all recovered to operate, and the direct current power distribution system is automatically switched back to the three-terminal power supply mode from the single-terminal power supply mode; and/or
The direct current power distribution system in the three-terminal power supply mode is disconnected in a distribution network or is stopped running, the direct current power distribution system is automatically switched to the STATCOM mode, or any one voltage source converter in the direct current power distribution system recovers running and drives the other voltage source converters to recover normal work, and the direct current power distribution system is automatically switched back to the three-terminal power supply mode from the STATCOM mode; and/or
When a non-T-connection line fault occurs in the direct current power distribution system in the double-end isolation mode, the direct current power distribution system is automatically switched into a single-end power supply mode, or the non-T-connection line fault in the direct current power distribution system is recovered, and the direct current power distribution system is automatically switched back to the double-end isolation mode from the single-end power supply mode; and/or
The direct current line in the direct current power distribution system in the double-end isolation mode is disconnected, the direct current power distribution system is automatically switched to the STATCOM mode, or the direct current line in the direct current power distribution system is switched on again, and the direct current power distribution system is automatically switched back to the double-end isolation mode from the STATCOM mode; and/or
When any one of the two normally-operated voltage source converters in the direct current power distribution system in the double-end power supply mode is out of operation, the direct current power distribution system is automatically switched into the single-end power supply mode, or when any one of the two out-of-operation voltage source converters in the direct current power distribution system is recovered to operate, the direct current power distribution system is automatically switched back to the double-end power supply mode from the single-end power supply mode; and/or
When a power supply cable fault occurs in the direct current power distribution system in the single-end power supply mode, the direct current power distribution system is automatically switched to the STATCOM mode, or the power supply cable fault in the direct current power distribution system is recovered, and the direct current power distribution system is automatically switched back to the single-end isolation mode from the STATCOM mode.
further, the operation mode division of the direct current power distribution system comprises:
The change of the topological structure of the direct current power distribution system causes the switching of the control modes of the power electronic equipment;
And dividing the operation modes of the direct current power distribution system according to the switching condition of the control modes of the power electronic equipment.
Further, the topology structure change of the direct current power distribution system comprises: one or more of dc line disconnection and restoration, single voltage source converter decommissioning and restoration, and voltage source converter ac side fault and fault restoration.
According to the invention, the operation modes of the direct current power distribution system are divided into a three-terminal power supply mode, a two-terminal isolation mode, a two-terminal power supply mode, a single-terminal power supply mode and a STATCOM mode, and then the system is freely switched among the five operation modes according to the change of a topological structure. The invention realizes the rapid and smooth switching of the operation modes of each controllable device in the direct current power distribution system so as to meet the current topological structure or operation state of the system, improves the power supply reliability of the load in the direct current power distribution system and further ensures the long-term stable work of the direct current power distribution system. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
fig. 1 shows a schematic structural diagram of a dc power distribution system according to an embodiment of the invention;
Fig. 2 is a schematic diagram illustrating an operation mode switching relationship of a dc power distribution system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
fig. 1 shows a schematic structural diagram of a dc power distribution system according to an embodiment of the invention. As shown, the DC distribution system includes three DC buses (a first DC bus DC1, a second DC bus DC2, a third DC bus DC3), three voltage source converters (a first voltage source converter VSC1, a second voltage source converter VSC2, a third voltage source converter VSC3), and a three-terminal AC distribution system (a first AC distribution system AC1, a second AC distribution system AC2, a third AC distribution system AC 3). Wherein the first DC bus DC1 is connected to the first AC distribution system AC1 via a first voltage source converter VSC 1. Like the connection structure of the first direct current bus DC1, the second direct current bus DC2 and the third direct current bus DC3 are connected with the second alternating current distribution system AC2 and the third alternating current distribution system AC3 sequentially through the second voltage source converter VSC2 and the third voltage source converter VSC 3; meanwhile, direct-current breakers are arranged on the three direct-current buses, a first direct-current breaker DCB1 is arranged on the first direct-current bus DC1, a second direct-current breaker DCB2 is arranged on the second direct-current bus DC2, and a third direct-current breaker DCB3 is arranged on the third direct-current bus DC 3; one side that three voltage source converter links to each other with the direct current bus is equipped with direct current breaker, and one side that links to each other with the alternating current distribution system is equipped with alternating current breaker, and the one end that first voltage source converter VSC1 and first direct current bus DC1 are connected sets up direct current breaker DCB4, and the one end that first voltage source converter VSC1 and first alternating current distribution system AC1 are connected sets up alternating current breaker ACB 1. Similar to the structure at two ends of the first voltage source converter VSC1, the two ends of the second voltage source converter VSC2 are connected with a direct current breaker DCB5 and an alternating current breaker ACB2, and the two ends of the third voltage source converter VSC3 are connected with a direct current breaker DCB6 and an alternating current breaker ACB 3. It should be noted that the present invention is exemplified by a dc circuit breaker and an ac circuit breaker, but the present invention is not limited to the dc circuit breaker and the ac circuit breaker, and any device capable of realizing circuit breaking protection can be used in the present invention, for example: a dc switching component, an ac switching component, and the like.
Based on the connection structure of the direct current distribution system, the direct current distribution system is connected with three alternating current distribution systems, and the alternating current distribution systems at the three ends can supply power to the direct current distribution system through a voltage source converter connected with the alternating current distribution systems; meanwhile, when one or more voltage source converters quit operation or break down, the rest voltage source converters maintain the normal operation of the direct current distribution system, and the direct current distribution system is ensured to stably work for a long time. Preferably, in the dc power distribution system according to the embodiment of the present invention, a power electronic device with bidirectional current capacity is selected as a component in the system, for example: the system comprises a voltage source converter, a direct current breaker, an alternating current breaker and the like with bidirectional current capacity, so that the system can automatically adapt to forward or reverse power flow when the operation mode of the system is changed, namely the system has a power bidirectional flow adaptive function.
Fig. 2 is a schematic diagram illustrating an operation mode switching relationship of a dc power distribution system according to an embodiment of the present invention. As shown in the figure, on the basis of the dc power distribution system, the method for switching the operation modes of the dc power distribution system in the embodiment of the present invention first divides the operation modes of the dc power distribution system into five types, i.e., a three-terminal power supply mode, a two-terminal isolation mode, a two-terminal power supply mode, a single-terminal power supply mode, and a STATCOM mode (Static Synchronous Compensator, i.e., a Static Synchronous compensation mode); then the system is freely switched among the five operation modes according to the change of the topological structure.
the division principle of the operation mode of the direct current power distribution system is mainly based on the switching condition of the control mode of the ground power electronic equipment caused by the topological structure change of the direct current power distribution system. The power direction in the system is not used as a judgment standard of the operation mode, and the power direction does not influence the control mode of each power electronic device because the system has an adaptive function of power bidirectional flow. The system topology includes: the direct current line is disconnected and recovered, the single voltage source converter is quitted to operate and is recovered to operate, or the alternating current side of the voltage source converter has faults and fault recovery. According to the operation mode division principle, the topological structure change of the direct current distribution system can cause the system to have the following 5 operation modes: three-terminal power supply mode, two-terminal isolation mode, single-terminal power supply mode and STATCOM mode. The three-terminal power supply mode is that all power electronic equipment in the direct current power distribution system work normally and are connected perfectly, and the direct current power distribution system and the three alternating current power distribution systems supply power normally; the double-end power supply mode is that one alternating current power distribution system quits operation, and the direct current power distribution system and the other two alternating current power distribution systems normally supply power; the single-ended power supply mode is that the two alternating current power distribution systems quit operation, and the direct current power distribution system only carries out normal power supply with the rest one alternating current power distribution system; the double-end isolation mode is based on the fact that when the system is in a three-end power supply mode, a T-connection circuit fault occurs or a direct current breaker on the T-connection circuit needs to be overhauled, and the rest two alternating current power distribution systems supply power through the direct current power distribution system. The T-connection line is a line which is connected from the middle of a line for supplying power from the first party to the second party and supplies power to the third party, and for example, a third direct current bus DC3 shown in FIG. 1; the STATCOM mode of the system is equivalent to a controllable reactive power supply, the reactive current of the system can quickly change along with the change of the load reactive current, the reactive power required by the system is automatically compensated, and the dynamic reactive power compensation is realized on the reactive power of a direct current power distribution system.
After the operation modes of the direct-current power distribution system are divided, the system is freely switched among the five operation modes according to the topological structure change of the system so as to meet the requirement of the changed topological structure of the system. The free switching mode among the five operation modes is as follows:
when the direct current power distribution system works normally, the system supplies power normally between the three alternating current power distribution systems AC1, AC2 and AC3, and the system is in a three-terminal power supply mode. When the direct current distribution system keeps a three-terminal power supply mode, the T-connection line DC3 in the system has a fault and the direct current breaker DCB3 on the T-connection line DC3 needs to be overhauled, the third voltage source converter VSC stops working, the first voltage source converter VSC1 and the second voltage source converter VSC2 still normally operate, and the operation mode of the system is automatically switched from the three-terminal power supply mode to a double-terminal isolation mode, namely the first alternating current distribution system AC1 and the second alternating current distribution system AC2 normally supply power with the direct current distribution system; or when the three AC power distribution systems AC1, AC2, and AC3 are normally powered with the system when the T-line fault is recovered, the system automatically switches back from the double-ended isolation mode to the three-ended power mode.
When the direct current power distribution system is in a three-end power supply mode, any one voltage source converter in the system quits operation, and the other voltage source converters work normally, and the operation mode of the system is automatically switched into a two-end power supply mode; or when the system is in a double-end power supply mode, the voltage source converter quitting operation in the system recovers operation, and the system is automatically switched into a three-end power supply mode.
When the system is in a three-terminal power supply mode, any two voltage source converters in the system quit operation, only one voltage source converter is left to normally work, and the system operation mode is directly switched from the three-terminal power supply mode to a single-terminal power supply mode; or when the system is in the single-end power supply mode, the two voltage source converters which quit the operation in the system are all recovered to operate, and the system is directly switched back to the three-end power supply mode.
When the system distribution network in the three-terminal power supply mode is disconnected or the distribution network is out of operation, the system is disconnected from the three alternating current distribution systems AC1, AC2 and AC3, and the system automatically switches to a STATCOM mode; or when any one voltage source converter in the system recovers to operate and drives the other voltage source converters to recover to normal operation, and the system recovers to be connected with the three alternating current distribution systems AC1, AC2 and AC3, the system automatically switches back to the three-terminal power supply mode from the STATCOM mode.
When a dc power distribution system is in double-ended isolation mode, if a non-T-junction fault occurs in the system again, for example: the second direct current bus DC2 has a non-T wiring fault, only the first alternating current distribution system AC1 and the system supply power normally, and the system automatically switches to a single-ended power supply mode; or when the non-T wiring fault is recovered, the first alternating current distribution system AC1 and the system are normally powered, the second alternating current distribution system AC2 and the system are recovered, and the third alternating current distribution system AC3 and the system are disconnected, the system is automatically switched back to the double-end isolation mode from the single-end power supply mode.
When the system is in double ended isolated mode, if the first DC bus DC1 and the second DC bus DC2 are both open, i.e. the first AC distribution system AC1, the second AC distribution system AC2 and the third AC distribution DC3 are all disconnected from the system, the system switches to STATCOM mode; or when the two direct current buses are reclosed, the system is switched back to the double-end isolation mode from the STATCOM mode.
When the system is in a double-end power supply mode, any one of two normally-working voltage source converters in the system quits operation again, namely only one remaining voltage source converter works normally, and the system is automatically switched to a single-end power supply mode from the double-end power supply mode; or when the system is in the single-end power supply mode, any one of the two voltage source converters which quit operation in the system recovers operation, namely the two voltage source converters normally work, and the system is automatically switched to the double-end power supply mode.
When the dc power distribution system is in single-ended supply mode, if the system supply cable fails, for example: when only the first alternating current distribution system AC1 and the system are normally powered, then the first direct current bus DC1 cable is failed, the first alternating current distribution system AC1 is disconnected with the system, and the system is automatically switched to the STATCOM mode; or when the cable fault of the first direct current bus DC1 is recovered, the first alternating current distribution system AC1 and the system recover power supply, and the second alternating current distribution system AC2 and the third alternating current distribution system AC3 and the system still cannot supply power, the system automatically switches from the STATCOM mode back to the single-end power supply mode.
According to the embodiment of the invention, the operation modes of the direct current power distribution system are divided into a three-terminal power supply mode, a two-terminal isolation mode, a two-terminal power supply mode, a single-terminal power supply mode and a STATCOM mode, and then the system is freely switched among the five operation modes according to the change of a topological structure. The embodiment of the invention realizes the rapid and smooth switching of the operation modes of each controllable device in the direct current power distribution system so as to meet the current topological structure or operation state of the system, improves the power supply reliability of the load in the direct current power distribution system and further ensures the long-term stable work of the direct current power distribution system.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (4)
1. A high-reliability operation mode switching method for a direct current power distribution system is characterized by comprising the following steps:
Dividing the operation mode of a direct current power distribution system into a three-terminal power supply mode, a two-terminal isolation mode, a two-terminal power supply mode, a single-terminal power supply mode and a STATCOM mode;
The direct current power distribution system is freely switched among different operation modes according to the change of the topological structure.
2. The handover method according to claim 1,
The free switching of the direct current power distribution system between different operation modes comprises the following steps:
When the direct current power distribution system in a three-terminal power supply mode has a T-connection line fault, the direct current power distribution system is automatically switched to a two-terminal isolation mode, or the T-connection line fault in the direct current power distribution system is recovered, and the direct current power distribution system is automatically switched back to the three-terminal power supply mode from the two-terminal isolation mode; and/or
when any voltage source converter in the direct current power distribution system in a three-terminal power supply mode quits operation, and the other voltage source converters work normally, the operation mode of the direct current power distribution system is automatically switched to a two-terminal power supply mode, or the voltage source converter quitting operation in the direct current power distribution system recovers operation, and the direct current power distribution system is automatically switched back to the three-terminal power supply mode from the two-terminal power supply mode; and/or
Any two voltage source converters in the direct current power distribution system in the three-terminal power supply mode quit operation, only one voltage source converter is left to work normally, the direct current power distribution system is automatically switched into the single-terminal power supply mode, or the two voltage source converters quitting operation in the direct current power distribution system are all recovered to operate, and the direct current power distribution system is automatically switched back to the three-terminal power supply mode from the single-terminal power supply mode; and/or
The direct current power distribution system in the three-terminal power supply mode is disconnected in a distribution network or is stopped running, the direct current power distribution system is automatically switched to the STATCOM mode, or any one voltage source converter in the direct current power distribution system recovers running and drives the other voltage source converters to recover normal work, and the direct current power distribution system is automatically switched back to the three-terminal power supply mode from the STATCOM mode; and/or
When a non-T-connection line fault occurs in the direct current power distribution system in the double-end isolation mode, the direct current power distribution system is automatically switched into a single-end power supply mode, or the non-T-connection line fault in the direct current power distribution system is recovered, and the direct current power distribution system is automatically switched back to the double-end isolation mode from the single-end power supply mode; and/or
The direct current line in the direct current power distribution system in the double-end isolation mode is disconnected, the direct current power distribution system is automatically switched to the STATCOM mode, or the direct current line in the direct current power distribution system is switched on again, and the direct current power distribution system is automatically switched back to the double-end isolation mode from the STATCOM mode; and/or
When any one of the two normally-operated voltage source converters in the direct current power distribution system in the double-end power supply mode is out of operation, the direct current power distribution system is automatically switched into the single-end power supply mode, or when any one of the two out-of-operation voltage source converters in the direct current power distribution system is recovered to operate, the direct current power distribution system is automatically switched back to the double-end power supply mode from the single-end power supply mode; and/or
when a power supply cable fault occurs in the direct current power distribution system in the single-end power supply mode, the direct current power distribution system is automatically switched to the STATCOM mode, or the power supply cable fault in the direct current power distribution system is recovered, and the direct current power distribution system is automatically switched back to the single-end isolation mode from the STATCOM mode.
3. the handover method according to claim 1,
The operation mode division of the direct current power distribution system comprises the following steps:
The change of the topological structure of the direct current power distribution system causes the switching of the control modes of the power electronic equipment;
And dividing the operation modes of the direct current power distribution system according to the switching condition of the control modes of the power electronic equipment.
4. The handover method according to claim 3,
The topology structure change of the direct current power distribution system comprises the following steps: one or more of dc line disconnection and restoration, single voltage source converter decommissioning and restoration, and voltage source converter ac side fault and fault restoration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910786718.0A CN110556813B (en) | 2019-08-23 | 2019-08-23 | High-reliability operation mode switching method for direct-current power distribution system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910786718.0A CN110556813B (en) | 2019-08-23 | 2019-08-23 | High-reliability operation mode switching method for direct-current power distribution system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110556813A true CN110556813A (en) | 2019-12-10 |
| CN110556813B CN110556813B (en) | 2023-06-06 |
Family
ID=68738058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910786718.0A Active CN110556813B (en) | 2019-08-23 | 2019-08-23 | High-reliability operation mode switching method for direct-current power distribution system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110556813B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170126008A1 (en) * | 2014-03-27 | 2017-05-04 | General Electric Company | System and method for direct current power transmission |
| CN107069821A (en) * | 2017-05-16 | 2017-08-18 | 成都课迪科技有限公司 | A kind of micro-capacitance sensor optimizes smoothness run method |
| CN108199422A (en) * | 2018-01-26 | 2018-06-22 | 南京工程学院 | A kind of operational mode switching system based on both ends flexible direct current power distribution network |
| CN108539776A (en) * | 2018-05-10 | 2018-09-14 | 国网江苏省电力有限公司徐州供电分公司 | One kind being used for low pressure flexibility supplying power allocation system coordination control method |
| CN109638897A (en) * | 2018-12-04 | 2019-04-16 | 国网冀北电力有限公司 | A kind of cooperative control method suitable for alternating current-direct current mixing power distribution network |
| CN109787198A (en) * | 2019-01-31 | 2019-05-21 | 清华大学 | A kind of method of operation switching method of three-port DC breaker |
| CN109936139A (en) * | 2019-04-30 | 2019-06-25 | 国网内蒙古东部电力有限公司 | A kind of power distribution network both-end flexible interconnection distribution system and its distribution method |
-
2019
- 2019-08-23 CN CN201910786718.0A patent/CN110556813B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170126008A1 (en) * | 2014-03-27 | 2017-05-04 | General Electric Company | System and method for direct current power transmission |
| CN107069821A (en) * | 2017-05-16 | 2017-08-18 | 成都课迪科技有限公司 | A kind of micro-capacitance sensor optimizes smoothness run method |
| CN108199422A (en) * | 2018-01-26 | 2018-06-22 | 南京工程学院 | A kind of operational mode switching system based on both ends flexible direct current power distribution network |
| CN108539776A (en) * | 2018-05-10 | 2018-09-14 | 国网江苏省电力有限公司徐州供电分公司 | One kind being used for low pressure flexibility supplying power allocation system coordination control method |
| CN109638897A (en) * | 2018-12-04 | 2019-04-16 | 国网冀北电力有限公司 | A kind of cooperative control method suitable for alternating current-direct current mixing power distribution network |
| CN109787198A (en) * | 2019-01-31 | 2019-05-21 | 清华大学 | A kind of method of operation switching method of three-port DC breaker |
| CN109936139A (en) * | 2019-04-30 | 2019-06-25 | 国网内蒙古东部电力有限公司 | A kind of power distribution network both-end flexible interconnection distribution system and its distribution method |
Non-Patent Citations (2)
| Title |
|---|
| 季一润 等: "一种适用于柔性直流配电网的电压控制策略", 《中国电机工程学报》 * |
| 季一润 等: "柔性直流配电网典型运行方式及切换方法", 《南方电网技术》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110556813B (en) | 2023-06-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100416972C (en) | System for providing assured power to a critical load | |
| CN102403886B (en) | Method for protecting direct current line transient short-circuit fault of modular multiple-level converter | |
| CN103001254B (en) | Alternating current and direct current hybrid micro-grid system | |
| EP3711128B1 (en) | Fault handling in a dc power system | |
| CN105659465A (en) | Electric protection on AC side of HVDC | |
| CN211089218U (en) | High-capacity high-reliability rapid power supply switching device | |
| CN109687569A (en) | Data center's power supply system | |
| CN110091757B (en) | Ground automatic neutral section passing device with redundancy function and control method | |
| CN103986137B (en) | Novel self fault recovery system of multifunctional current limiter and control method of novel self fault recovery system | |
| CN108347056B (en) | AC/DC hybrid micro-grid control method | |
| CN110690755A (en) | Communication power supply system | |
| CN110601168A (en) | High-power high-reliability high-voltage direct-current power supply system | |
| CN110556813A (en) | high-reliability operation mode switching method for direct-current power distribution system | |
| CN113572189B (en) | Bipolar flexible direct current system for offshore wind power and transformer fault switching method thereof | |
| CN116191645A (en) | Priority-based aircraft dual-redundancy power supply anti-parallel circuit | |
| CN114069579A (en) | Method for power supply recovery after flexible direct-current distribution line fault based on injection signal | |
| CN110556794B (en) | Bus bar protection configuration method of multi-end hybrid direct current system | |
| CN109088444B (en) | Optimization method for non-full-phase protection action performance of direct-current receiving-end phase modulator | |
| CN110350650B (en) | High-capacity high-reliability rapid power supply switching device and switching control method thereof | |
| CN219999093U (en) | Main and standby power supply automatic conversion control device for dust removal system and dust removal system | |
| CN111884196A (en) | Method and device for power supply recovery after flexible direct-current distribution line fault | |
| CN208001183U (en) | Backup auto-activating device and system | |
| CN202565018U (en) | Mixing neutral-point grounding system | |
| CN112049728A (en) | Uninterrupted operation system and method based on vehicle-mounted gas turbine generator set | |
| CN101820184B (en) | Communication power supply 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 |