CN113922365B - Power grid self-healing circuit and method for multiple connecting lines - Google Patents
Power grid self-healing circuit and method for multiple connecting lines Download PDFInfo
- Publication number
- CN113922365B CN113922365B CN202111161049.1A CN202111161049A CN113922365B CN 113922365 B CN113922365 B CN 113922365B CN 202111161049 A CN202111161049 A CN 202111161049A CN 113922365 B CN113922365 B CN 113922365B
- Authority
- CN
- China
- Prior art keywords
- grid
- breaker
- self
- circuit
- healing
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000003990 capacitor Substances 0.000 claims description 18
- 101150013204 MPS2 gene Proteins 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000011217 control strategy Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 7
- 230000007704 transition Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a power grid self-healing circuit for multiple tie lines, which comprises a back-to-back converter, wherein one end of the back-to-back converter is sequentially connected with a converter transformer T1 and a breaker QF1, and one end of the breaker QF1 is connected with the converter transformer T1; the other end of the back-to-back converter is also sequentially connected with a current transformer T2 and a circuit breaker QF2, and one end of the circuit breaker QF2 is connected with the current transformer T2; the other end of the breaker QF2 is sequentially connected with one end of a disconnecting switch GK5 and one end of a series transformer T3, and the adjusting end of the series transformer T3 is further sequentially connected with the disconnecting switch GK4 and the other end of the back-to-back converter. The invention also discloses a power grid self-healing method for the multiple connecting lines. The invention can accelerate the parallel speed between the power grids after an accident, improve the controllability of the interconnection of the power grids and strengthen the self-healing capacity of the interconnection power grids.
Description
Technical Field
The invention belongs to the technical field of power grid control, relates to a power grid self-healing circuit for multiple connecting lines, and further relates to a power grid self-healing method for multiple connecting lines.
Background
The construction of the global energy internet is a trend, and the development of the global energy internet is continuously promoted. With the rapid development of ultra-high voltage technology in China, the power system has become a large-scale interconnected power grid featuring large scale and large capacity. The safety, high quality and high efficiency of large-scale power transmission network operation and the realization of harmonious development with the environment are the development targets of future power transmission networks. The power grid interconnection can effectively reduce economic cost, enhance power transmission capability, improve power quality, comprehensively arrange resources and fully accept clean energy. The power grid interconnection has the characteristics of complex structure, variable operation modes, huge self quantity and the like, more risks and challenges are brought to the operation of the power grid, and higher requirements are provided for the safe and stable operation of the power grid.
The main technical difficulties faced by the current interconnection between power grids include the following aspects:
(1) large parallel impact and long time between electric network
When a 'bottom-up' recovery strategy is adopted after a blackout accident, after a partitioned power system is successfully started in black, all subsystems need to be operated in parallel, but often the frequency and the voltage of all the subsystems are not completely the same, sometimes even the condition that grid connection conditions are not met exists, and at the moment, large impact is caused by parallel operation, and grid connection failure is caused in serious cases.
(2) The grid interconnection controllability and the intelligent degree are low
At present, power grids are interconnected through alternating current connecting lines, along with development of power enterprises and social science and technology, power exchange between the power grids is quite frequent and complex, the connecting lines do not have the capacity of adjusting tide, and the problem of low controllability exists only through connecting line interconnection.
(3) The existing self-healing circuit has complex topological structure
At present, the self-healing circuit research is carried out by the existing team, the existing self-healing circuit can basically realize the conversion of three modes, but the circuit topology adopts a large number of circuit breakers and isolating switches, the integral structure is complex, and the operation during the circuit conversion is complex; the existing self-healing circuit only considers the scene applied to the single connecting lines at two ends, and has a small application range.
Disclosure of Invention
The invention aims to provide a power grid self-healing circuit for multiple connecting lines, which can accelerate the parallel speed between power grids after an accident, improve the controllability of power grid interconnection and strengthen the self-healing capacity of the interconnected power grids.
The technical scheme adopted by the invention is as follows:
the utility model provides a power grid self-healing circuit for many tie lines, includes back-to-back converter, back-to-back converter's one end connects gradually converter transformer T1 and circuit breaker QF1, and circuit breaker QF 1's one end is connected with converter transformer T1, and circuit breaker QF 1's the other end is as the first access end of power grid self-healing circuit;
the other end of the back-to-back converter is also sequentially connected with a current transformer T2 and a breaker QF2, one end of the breaker QF2 is connected with the current transformer T2, and the other end of the breaker QF2 is a third access end;
the third access end is sequentially connected with one end of the isolating switch GK5 and one end of the series transformer T3, the other end of the series transformer T3 is a second access end, and the adjusting end of the series transformer T3 is further sequentially connected with the isolating switch GK4 and the other end of the back-to-back converter.
The invention is also characterized in that:
the back-to-back converter comprises a converter MMC1, a first capacitor is connected between the direct current sides of the converter MMC1, one end of the first capacitor is connected with one end of a second capacitor through a disconnecting switch GK2, the other end of the first capacitor is connected with the other end of the second capacitor through a disconnecting switch GK3, and the second capacitor is connected between the direct current sides of the converter MMC 2.
The current converter MMC1 and the current converter MMC2 are modularized multi-level current converters.
It is another object of the present invention to provide a method for self-healing of a power grid for multiple links.
The invention adopts another technical scheme that:
a power grid self-healing method for multiple connecting lines comprises the following specific steps:
step 1, connecting a power grid self-healing circuit for multiple connecting lines to a grid-connected system and a power grid system to be parallel, wherein the connection mode is as follows:
the bus of the first system to be connected with the grid is sequentially connected with a tie line breaker, an alternating current circuit and the second system to be connected with the grid through a plurality of tie lines, one end of the tie line breaker, which is close to the alternating current circuit, is also connected with one end of a tie line isolating switch, and the other ends of all the tie line isolating switches are connected with a third access end; the first access end is connected with a bus of the first system to be connected with the grid through a disconnecting switch GK1, and the second access end is connected with the bus of the first system to be connected with the grid through a disconnecting switch GK 6;
step 2, when the systems to be connected are in stable operation, the systems need to be connected with each other, and at the moment, the power grid self-healing circuit is applied to a grid connection mode: before grid connection, the breaker QF3 is in an off state, after a control system sends a grid connection instruction, the isolating switch GK1, the isolating switch GK2, the isolating switch GK3 and the interconnecting wire isolating switch are closed, and then the breaker QF1 and the breaker QF2 are respectively closed, so that a circuit structure in a grid connection mode can be formed, as shown in figure 5;
step 3: when the grid connection of the grid-connected system is completed, after the system is stable, the self-healing circuit of the power grid is required to be withdrawn: the two systems to be parallel are connected through back-to-back converters, at the moment, the two systems to be parallel are controlled to transmit active power and reactive power through the back-to-back converters, a corresponding control strategy is used for reducing the frequency difference and the voltage difference of the two systems to be parallel to the two sides until the two systems meet grid connection conditions, then, a contact line breaker is switched on at the moment of searching for the zero crossing of the slip, and the breaker QF1 and the breaker QF2 are switched off, so that the grid connection function is realized, and the step of exiting the self-healing circuit of the power grid is completed;
and 4, after the system is stable, converting the operation mode into a tie-line power control mode so as to realize the function of tie-line power control, wherein the switching mode is as follows: after the grid self-healing circuit completes grid connection operation and exits operation, closing a disconnecting switch GK4, a disconnecting switch GK5 and a disconnecting switch GK6, closing a circuit breaker QF1, and finally opening a connecting line circuit breaker to complete conversion from a grid connection mode to a connecting line power flow control mode;
step 5, when the system is greatly disturbed and out-of-step oscillation occurs, the power grid self-healing circuit works in a disconnection mode: at the moment, the power grid self-healing circuit sends a splitting instruction according to a splitting criterion, performs splitting operation, opens the tie line breaker, and simultaneously stops out-of-step splitting monitoring to complete the splitting operation.
In the step 1, the number of the second systems to be connected in parallel is one or more.
In the step 3, the grid connection condition simultaneously satisfies formulas (1) to (3):
|Δf|＜(0.2％～0.5％)f N (1)
|ΔU|＜(5％～10％)U N (2)
|Δδ|＜10° (3)
wherein Δf is the frequency difference, ΔU is the voltage difference, Δδ is the phase angle difference, f N For nominal frequency, U N Is rated voltage.
The beneficial effects of the invention are as follows:
1. the invention converts the existing FACTS device into the power grid self-healing circuit for multiple connecting lines through corresponding electric operation, adopts a grid-connected control strategy to realize synchronous parallel of the power grids, can expand the functions of the device, improve the utilization rate of the device, realize the maximization target of comprehensive performance and economic benefit, and provide basic conditions for realizing self-healing and grid-connected automation of the intelligent power grid.
2. The invention adopts an interaction mechanism and a control strategy of integrating grid operation disconnection, grid connection and tie line control, realizes the organic smooth transition and the self-healing of the power grid in three operation modes of a grid connection mode, a tie line power flow control mode and a disconnection mode, and improves the intelligent level of the inter-grid control.
3. Compared with the existing self-healing circuit, the circuit structure of the self-healing circuit is optimized, and partial circuit breakers and isolating switches are reduced, so that the self-healing circuit is more concise and efficient; the invention adds a topological structure applied to multiple connecting lines, can realize the organic smooth transition and the self-healing of the power grid of three operation modes of the multiple connecting lines between two subsystems or a plurality of subsystems, and has practical significance for improving the working efficiency and the economy of the self-healing circuit.
Drawings
FIG. 1 is a block diagram of a self-healing circuit for a multi-tie power grid of the present invention;
FIG. 2 is a block diagram of a self-healing circuit for a multi-tie grid applied between two multi-ties of a system to be grid-connected according to the present invention;
FIG. 3 is a block diagram of a self-healing circuit for a multi-tie grid applied between multiple tie lines of a plurality of systems to be grid-connected according to the present invention;
FIG. 4 is a flow chart of a method of grid self-healing for multiple tie lines of the present invention;
FIG. 5 is a circuit block diagram of a grid self-healing method for multiple tie lines of the present invention operating in a grid-tie mode;
FIG. 6 is a circuit block diagram of a self-healing method of the present invention for a multi-link power grid operating in an off-grid self-healing circuit;
FIG. 7 is a circuit block diagram of a tie power control mode in which the grid self-healing method for multiple ties of the present invention operates;
fig. 8 is a circuit configuration diagram of a disconnection mode in which the power grid self-healing method for multiple tie lines of the present invention operates.
Detailed Description
The invention will be described in detail below with reference to the drawings and the detailed description.
The invention relates to a power grid self-healing circuit for multiple tie lines, as shown in figure 1, comprising a back-to-back converter, wherein one end of the back-to-back converter is sequentially connected with a converter transformer T1 and a breaker QF1, one end of the breaker QF1 is connected with the converter transformer T1, and the other end of the breaker QF1 is used as a first access end of the power grid self-healing circuit;
the other end of the back-to-back converter is also sequentially connected with a current transformer T2 and a breaker QF2, one end of the breaker QF2 is connected with the current transformer T2, and the other end of the breaker QF2 is a third access end;
the third access end is sequentially connected with one end of the isolating switch GK5 and one end of the series transformer T3, the other end of the series transformer T3 is a second access end, and the adjusting end of the series transformer T3 is further sequentially connected with the isolating switch GK4 and the other end of the back-to-back converter.
The back-to-back converter comprises a converter MMC1, a first capacitor is connected between the direct current sides of the converter MMC1, one end of the first capacitor is connected with one end of a second capacitor through a disconnecting switch GK2, the other end of the first capacitor is connected with the other end of the second capacitor through a disconnecting switch GK3, the second capacitor is connected between the direct current sides of the converter MMC2, and the converter MMC1 and the converter MMC2 are modularized multi-level converters.
The invention relates to a power grid self-healing method for multiple connecting lines, which comprises the following specific steps:
step 1, connecting a power grid self-healing circuit for multiple connecting lines to a grid-connected system and a power grid system to be parallel, wherein the connection mode is as follows:
the bus of the first system to be connected with the grid is sequentially connected with a tie line breaker, an alternating current circuit and the second system to be connected with the grid through a plurality of tie lines, one end of the tie line breaker, which is close to the alternating current circuit, is also connected with one end of a tie line isolating switch, and the other ends of all the tie line isolating switches are connected with a third access end; the first access end is connected with a bus of the first system to be connected with the grid through a disconnecting switch GK1, and the second access end is connected with the bus of the first system to be connected with the grid through a disconnecting switch GK 6;
in the invention, the number of the second systems to be connected can be one or a plurality of the second systems to be connected, and when the number of the second systems to be connected is one, the invention can realize the organic smooth transition and the self-healing of the power grid of three operation states of multiple connecting lines between the two systems to be connected, as shown in figure 2. When the number of the second systems to be connected is multiple, three operation states of organic smooth transition and self-healing of the power grid of multiple connecting lines among the multiple systems to be connected are realized, as shown in fig. 3.
Step 2, when the systems to be connected are in stable operation, the systems need to be connected with each other, and at the moment, the power grid self-healing circuit is applied to a grid connection mode: before grid connection, the breaker QF3 is in an off state, after a grid connection instruction is sent by the control system, the isolating switch GK1, the isolating switch GK2, the isolating switch GK3 and the interconnecting line isolating switch are closed, and then the breaker QF1 and the breaker QF2 are respectively closed, so that a circuit structure in a grid connection mode can be formed, as shown in figure 5.
Step 3: when the grid connection of the grid-connected system is completed, after the system is stable, the self-healing circuit of the power grid is required to be withdrawn: the two systems to be parallel are connected through the back-to-back converter, at the moment, the two systems to be parallel are controlled to transmit active power and reactive power through the back-to-back converter, the frequency difference and the voltage difference of the two systems to be parallel are reduced to the frequency difference and the voltage difference of the two systems to be parallel by using corresponding control strategies, after the two systems meet grid-connected conditions, the contact line breaker is switched on at the moment of searching for the zero crossing of the slip, and the breaker QF1 and the breaker QF2 are switched off, so that the grid-connected function is realized, and the step of exiting the self-healing circuit of the power grid is completed, as shown in figure 6.
Wherein the grid connection condition simultaneously satisfies formulas (1) to (3):
|Δf|＜(0.2％～0.5％)f N (1)
|ΔU|＜(5％～10％)U N (2)
|Δδ|＜10° (3)
wherein Δf is the frequency difference, ΔU is the voltage difference, Δδ is the phase angle difference, f N For nominal frequency, U N Is rated voltage.
And 4, after the system is stable, converting the operation mode into a tie-line power control mode so as to realize the function of tie-line power control, wherein the switching mode is as follows: after the grid self-healing circuit completes grid connection operation and exits operation, the isolating switch GK4, the isolating switch GK5 and the isolating switch GK6 are switched on, the circuit breaker QF1 is switched on, and finally the tie circuit breaker is switched off, so that conversion from a grid connection mode to a tie power flow control mode is completed, as shown in figure 7.
Step 5, when the system is greatly disturbed and out-of-step oscillation occurs, the power grid self-healing circuit works in a disconnection mode: at this time, the power grid self-healing circuit sends a disconnection instruction according to a disconnection criterion, and performs a disconnection operation, so that the tie line breaker is disconnected, and meanwhile, the out-of-step disconnection monitoring is stopped, so that the disconnection operation is completed, as shown in fig. 8.
Claims (4)
1. The power grid self-healing method for the multi-tie lines is characterized by comprising a power grid self-healing circuit for the multi-tie lines, wherein one end of the back-to-back converter is sequentially connected with a converter transformer T1 and a circuit breaker QF1, one end of the circuit breaker QF1 is connected with the converter transformer T1, and the other end of the circuit breaker QF1 is used as a first access end of the power grid self-healing circuit;
the other end of the back-to-back converter is also sequentially connected with a converter transformer T2 and a breaker QF2, one end of the breaker QF2 is connected with the converter transformer T2, and the other end of the breaker QF2 is a third access end;
the third access end is sequentially connected with one end of the isolating switch GK5 and one end of the series transformer T3, the other end of the series transformer T3 is a second access end, and the adjusting end of the series transformer T3 is further sequentially connected with the isolating switch GK4 and the other end of the back-to-back converter;
the back-to-back converter comprises a converter MMC1, a first capacitor is connected between the direct current sides of the converter MMC1, one end of the first capacitor is connected with one end of a second capacitor through a disconnecting switch GK2, the other end of the first capacitor is connected with the other end of the second capacitor through a disconnecting switch GK3, and the second capacitor is connected between the direct current sides of the converter MMC 2;
the method comprises the following specific steps:
step 1, connecting the power grid self-healing circuit for the multiple connecting lines to a grid-connected system and a power grid system to be parallel, wherein the connection mode is as follows:
the bus of the first system to be connected with the grid is sequentially connected with a tie line breaker, an alternating current circuit and a second system to be connected with the grid through a plurality of tie lines, one end of the tie line breaker, which is close to the alternating current circuit, is also connected with one end of a tie line isolating switch, and the other ends of all the tie line isolating switches are connected with a third access end; the first access end is connected with a bus of the first system to be connected with the grid through a disconnecting switch GK1, and the second access end is connected with the bus of the first system to be connected with the grid through a disconnecting switch GK 6;
step 2, when the systems to be connected are in stable operation, the systems need to be connected with each other, and at the moment, the power grid self-healing circuit is applied to a grid connection mode: before grid connection, the breaker QF3 is in an off state, after a control system sends a grid connection instruction, the isolating switch GK1, the isolating switch GK2, the isolating switch GK3 and the interconnecting wire isolating switch are closed, and then the breaker QF1 and the breaker QF2 are respectively closed, so that a circuit structure in a grid connection mode can be formed;
step 3: when the grid connection of the grid-connected system is completed, after the system is stable, the self-healing circuit of the power grid is required to be withdrawn: the two systems to be parallel are connected through back-to-back converters, at the moment, the two systems to be parallel are controlled to transmit active power and reactive power through the back-to-back converters, a corresponding control strategy is used for reducing the frequency difference and the voltage difference of the two systems to be parallel to the two sides until the two systems meet grid connection conditions, then, a contact line breaker is switched on at the moment of searching for the zero crossing of the slip, and the breaker QF1 and the breaker QF2 are switched off, so that the grid connection function is realized, and the step of exiting the self-healing circuit of the power grid is completed;
and 4, after the system is stable, converting the operation mode into a link power control mode so as to realize the function of link power control, wherein the switching mode is as follows: after the grid self-healing circuit completes grid connection operation and exits operation, closing a disconnecting switch GK4, a disconnecting switch GK5 and a disconnecting switch GK6, closing a circuit breaker QF1, and finally opening a connecting line circuit breaker to complete conversion from a grid connection mode to a connecting line power flow control mode;
step 5, when the system is greatly disturbed and out-of-step oscillation occurs, the power grid self-healing circuit works in a disconnection mode: at the moment, the power grid self-healing circuit sends a splitting instruction according to a splitting criterion, performs splitting operation, opens the tie line breaker, and simultaneously stops out-of-step splitting monitoring to complete the splitting operation.
2. The method for self-healing a multi-link power grid according to claim 1, wherein in step 1, the number of the second systems to be connected to the grid is one or more.
3. The method for self-healing a multi-link power grid according to claim 1, wherein the grid-connected condition in step 3 is that formulas (1) to (3) are satisfied simultaneously:
|Δf|<(0.2％～0.5％)f N (1)
|ΔU|<(5％～10％)U N (2)
|Δδ|<10° (3)
wherein Δf is the frequency difference, ΔU is the voltage difference, Δδ is the phase angle difference, f N For nominal frequency, U N Is rated voltage.
4. A method for grid self-healing for multiple tie lines according to claim 1, wherein the converters MMC1 and MMC2 are modular multilevel converters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111161049.1A CN113922365B (en) | 2021-09-30 | 2021-09-30 | Power grid self-healing circuit and method for multiple connecting lines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111161049.1A CN113922365B (en) | 2021-09-30 | 2021-09-30 | Power grid self-healing circuit and method for multiple connecting lines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113922365A CN113922365A (en) | 2022-01-11 |
| CN113922365B true CN113922365B (en) | 2024-01-30 |
Family
ID=79237617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111161049.1A Active CN113922365B (en) | 2021-09-30 | 2021-09-30 | Power grid self-healing circuit and method for multiple connecting lines |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113922365B (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101436780A (en) * | 2008-12-18 | 2009-05-20 | 国网电力科学研究院 | Self-healing control method for urban power distribution network |
| CN102694381A (en) * | 2011-03-25 | 2012-09-26 | 珠海优特电力科技股份有限公司 | Multistage electrical-network self-healing control device and control method thereof |
| CN104065099A (en) * | 2014-05-29 | 2014-09-24 | 国家电网公司 | AC/DC hybrid modularized microgrid network structure based on hybrid energy storage and networking method of structure |
| CN104393602A (en) * | 2014-12-12 | 2015-03-04 | 新奥科技发展有限公司 | Adjusting method and device for distributed energy resource network |
| EP2863235A1 (en) * | 2012-06-15 | 2015-04-22 | China Electric Power Research Institute | Low voltage ride through detection device for grid-connected photovoltaic inverter |
| CN106159942A (en) * | 2016-07-25 | 2016-11-23 | 许继集团有限公司 | MMC UPFC system and series side inverter stoppage in transit method thereof |
| CN106451457A (en) * | 2016-09-18 | 2017-02-22 | 南京南瑞集团公司 | Method for calculating weak-tie call wire power control strategies of large and small power grids in real time |
| CN106803679A (en) * | 2015-11-26 | 2017-06-06 | 国网智能电网研究院 | A kind of flexible ring net controller and control method for electromagnetic looped network solution inscription of loop |
| CN207625288U (en) * | 2017-12-20 | 2018-07-17 | 南京南瑞继保工程技术有限公司 | A kind of fault disconnection device accessing multiple regional powers suitable for double-bus |
| CN108599244A (en) * | 2018-04-28 | 2018-09-28 | 深圳供电局有限公司 | A kind of power grid isolated island black starting-up device and method based on work frequency variation |
| CN109638813A (en) * | 2018-11-22 | 2019-04-16 | 西安理工大学 | A kind of circuit that realizing power grid self-healing and control method |
| CN110233478A (en) * | 2019-06-06 | 2019-09-13 | 北京四方继保自动化股份有限公司 | Supply network Millisecond method for fast reconstruction and system after electric network fault |
| CN112821403A (en) * | 2021-01-09 | 2021-05-18 | 华北电力大学（保定） | Single-phase or three-phase electromagnetic series-connection type power transmission line power flow control topological circuit |
| CN113381503A (en) * | 2021-06-11 | 2021-09-10 | 广东电网有限责任公司广州供电局 | Control method for improving power supply reliability of distribution network area by adopting mobile power supply |
-
2021
- 2021-09-30 CN CN202111161049.1A patent/CN113922365B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101436780A (en) * | 2008-12-18 | 2009-05-20 | 国网电力科学研究院 | Self-healing control method for urban power distribution network |
| CN102694381A (en) * | 2011-03-25 | 2012-09-26 | 珠海优特电力科技股份有限公司 | Multistage electrical-network self-healing control device and control method thereof |
| EP2863235A1 (en) * | 2012-06-15 | 2015-04-22 | China Electric Power Research Institute | Low voltage ride through detection device for grid-connected photovoltaic inverter |
| CN104065099A (en) * | 2014-05-29 | 2014-09-24 | 国家电网公司 | AC/DC hybrid modularized microgrid network structure based on hybrid energy storage and networking method of structure |
| CN104393602A (en) * | 2014-12-12 | 2015-03-04 | 新奥科技发展有限公司 | Adjusting method and device for distributed energy resource network |
| CN106803679A (en) * | 2015-11-26 | 2017-06-06 | 国网智能电网研究院 | A kind of flexible ring net controller and control method for electromagnetic looped network solution inscription of loop |
| CN106159942A (en) * | 2016-07-25 | 2016-11-23 | 许继集团有限公司 | MMC UPFC system and series side inverter stoppage in transit method thereof |
| CN106451457A (en) * | 2016-09-18 | 2017-02-22 | 南京南瑞集团公司 | Method for calculating weak-tie call wire power control strategies of large and small power grids in real time |
| CN207625288U (en) * | 2017-12-20 | 2018-07-17 | 南京南瑞继保工程技术有限公司 | A kind of fault disconnection device accessing multiple regional powers suitable for double-bus |
| CN108599244A (en) * | 2018-04-28 | 2018-09-28 | 深圳供电局有限公司 | A kind of power grid isolated island black starting-up device and method based on work frequency variation |
| CN109638813A (en) * | 2018-11-22 | 2019-04-16 | 西安理工大学 | A kind of circuit that realizing power grid self-healing and control method |
| CN110233478A (en) * | 2019-06-06 | 2019-09-13 | 北京四方继保自动化股份有限公司 | Supply network Millisecond method for fast reconstruction and system after electric network fault |
| CN112821403A (en) * | 2021-01-09 | 2021-05-18 | 华北电力大学（保定） | Single-phase or three-phase electromagnetic series-connection type power transmission line power flow control topological circuit |
| CN113381503A (en) * | 2021-06-11 | 2021-09-10 | 广东电网有限责任公司广州供电局 | Control method for improving power supply reliability of distribution network area by adopting mobile power supply |
Non-Patent Citations (4)
| Title |
|---|
| 一种电网解列、并列与联络线潮流综合控制方法;刘家军;王锟;谭雅岚;杨松;任娟;;电气传动(第08期);第103-106页 * |
| 基于功率传递的电网间同期并列理论与应用研究综述;刘家军;支建刚;宋潇;;电网与清洁能源(第12期);全文 * |
| 基于背靠背VSC-HVDC同期并列装置转换为UPFC的策略研究;刘家军;任娟;王锟;杨松;;电网与清洁能源(第07期);第8-12页 * |
| 基于背靠背VSC-HVDC电网间同期并列装置实现UPFC的仿真研究;刘家军;王锟;杨松;;电力电容器与无功补偿(第01期);第152-156页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113922365A (en) | 2022-01-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107947221B (en) | Power electronic transformer direct-current fault ride-through method | |
| CN107276125A (en) | A kind of chain type multiport grid connection interface device and control method | |
| WO2021164304A1 (en) | Hybrid mmc having low proportion of full-bridge sub-modules and direct current fault processing method | |
| US20210376594A1 (en) | Resistive sub-module hybrid mmc and direct current fault processing strategy thereof | |
| CN107800298B (en) | Modularized solid-state transformer based on distributed high-frequency transformation and control method thereof | |
| CN101383494A (en) | DC control protection method for line ice melting of extra-high voltage DC transmission system | |
| CN205377273U (en) | Mix direct current transmission system back -to -back | |
| CN110994662A (en) | Start-stop control method for offshore wind power flexible direct current delivery system | |
| CN103023132A (en) | Control method for realizing passive off-network seamless switching by using energy storage converter | |
| CN111463763A (en) | Multi-port hybrid direct-current circuit breaker with power flow control function and control method | |
| CN212183137U (en) | Power plant energy storage black start system | |
| CN113036800B (en) | Flexible interconnection substation structure and control method | |
| CN108429278B (en) | LCC-MMC system single valve bank input control method and DC power transmission system | |
| CN113991670A (en) | Alternating-current flexible loop closing control device for power grid and control method thereof | |
| CN113922365B (en) | Power grid self-healing circuit and method for multiple connecting lines | |
| CN105207260A (en) | Angle-type three-phase alternating-current serial-connection type photovoltaic array | |
| Deng et al. | Coordinated control and application of multi-terminal DC distribution system | |
| CN203813692U (en) | Hybrid energy storage inverter system based on storage battery and super capacitor | |
| Menghan et al. | Flexible multi-state switch application scenario analysis | |
| CN113346500B (en) | Flexible switching converter supporting micro-grid full-autonomous control and control method | |
| Chong et al. | A Power Conversion System For Large-Scale Reversible SOFC Energy Storage System | |
| CN111884246B (en) | Direct-current fault clearing method of layered series-parallel direct-current transmission system | |
| CN115411723A (en) | Network source load multi-terminal interconnection low-voltage distribution network control system based on load migration strategy | |
| Zhao et al. | An overview on application analysis of power electronic technology in smart grid | |
| Liu et al. | Current Status and Key Issues of HVDC Transmission Research: A Brief Review |
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 |