CN107591877A - A kind of flexible supplying power allocation system failure control method - Google Patents
A kind of flexible supplying power allocation system failure control method Download PDFInfo
- Publication number
- CN107591877A CN107591877A CN201711000000.1A CN201711000000A CN107591877A CN 107591877 A CN107591877 A CN 107591877A CN 201711000000 A CN201711000000 A CN 201711000000A CN 107591877 A CN107591877 A CN 107591877A
- Authority
- CN
- China
- Prior art keywords
- flexible
- failure
- current transformer
- bus
- supplying power
- 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
Landscapes
- Direct Current Feeding And Distribution (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a kind of flexible supplying power allocation system failure control method, including (1) when there is incoming power failure, maintain system stable using the incoming power faulty control unit in flexible supplying power allocation system failure control unit, control realizes that power failure ac bus recovers normal power supply；(2) when there is mother failure, maintain system stable using the mother faulty control unit in flexible supplying power allocation system failure control unit, control realizes that power failure ac bus recovers normal power supply；(3) when there is flexible current transformer failure, maintain system stable using the current transformer faulty control unit in flexible supplying power allocation system failure control unit.In the present invention when there is incoming power failure, mother failure or flexible current transformer failure, reasonable controlling switch and PCS running status, system stable operation under fault condition is realized；Meanwhile when corresponding to fault recovery, being capable of control system recovery normal power supply, effective lifting electric power system power supply reliability and flexibility.
Description
Technical field
The invention belongs to flexible direct current distribution technique field, more particularly to a kind of flexible supplying power allocation system failure controlling party
Method.
Background technology
In recent years, in low-voltage distribution network electric power system field, with the continuous increase of distributed power source access amount, electric automobile
It is continuously increased and controllable burden increases so that conventional electrical distribution wire side faces many challenges.It is traditional in order to solve this problem
Power network gradually turns to aggressive mode from Passive Mode, wherein forming alternating current-direct current mixing power distribution system using Technology of HVDC based Voltage Source Converter
System, turn into the effective way of power distribution network development.
In traditional supplying power allocation system, when incoming power or mother failure, by control mother or service entrance switch come to
Dead electricity bussed supply, this mode is unfavorable for the flexible allocation of power and power failure process is longer, passes through flexible supplying power allocation system
The reasonable control of fault condition can quickly, be flexibly realized, gives full play to the superiority of flexible supplying power allocation system.Flexibility is matched somebody with somebody
Net electric power system carries out flexible interconnection by accessing flexible current transformer on every section of ac bus, then by dc bus, entirely
Electric power system power electronic equipment increases, and control becomes complicated, and the reliability for how improving electric power system is particularly important.This
Just need to provide a kind of intelligent control method, realize the flexible control of the system under different faults operating mode, when corresponding to fault recovery,
Control system recovers normal power supply.
The content of the invention
In view of the above-mentioned problems, the present invention proposes a kind of flexible supplying power allocation system failure control method, it is electric when there is inlet wire
When source failure, mother failure or flexible current transformer (Power Conversion System, PCS) failure, reasonable controlling switch and
PCS running status, realize system stable operation under fault condition；Meanwhile when corresponding to fault recovery, being capable of control system recovery
Normal power supply, effectively lift electric power system power supply reliability and flexibility.
Above-mentioned technical purpose is realized, reaches above-mentioned technique effect, the present invention is achieved through the following technical solutions：
A kind of flexible supplying power allocation system failure control method, described flexible supplying power allocation system include n platforms flexibility
Current transformer, n bars incoming power, n sections ac bus, (n-1) individual bus connection switch, n service entrance switch and dc bus, the flexibility
The both ends of current transformer connect dc bus and corresponding ac bus respectively, pass through bus connection switch phase between adjacent ac bus
Even；Each service entrance switch be separately positioned on corresponding between flexible current transformer and incoming power；Following steps：
(1) when there is incoming power failure, the incoming power in flexible supplying power allocation system failure control unit is utilized
Faulty control unit maintains system stable, and control realizes that power failure ac bus recovers normal power supply；
(2) when there is mother failure, the mother Fault Control in flexible supplying power allocation system failure control unit is utilized
Unit maintains system stable, and control realizes that power failure ac bus recovers normal power supply；
(3) when there is flexible current transformer failure, the current transformer in flexible supplying power allocation system failure control unit is utilized
Faulty control unit maintains system stable.
Further, according to load and incoming power capacity under the flexible supplying power allocation system accidental conditions
Size, m bar incoming powers are selected to put into operation, it is corresponding to start m platform flexibility current transformers, (n-m) individual bus connection switch is closed, m is whole
Number, 1≤m≤n.
Further, the n is integer, and n >=2,
Further, the step (1) is specially：
1.1：Each incoming power state in detecting system；
1.2：When there is any incoming power failure, if the DC voltage control flag bit of corresponding flexible current transformer is the
During one setting value, then it is point position to control corresponding service entrance switch, starts another flexible current transformer, is at DC voltage control
Pattern controls DC bus-bar voltage, and this TV station flexibility current transformer switches to VF operational modes, between being provided not for failure ac bus
Power-off source；If corresponding flexible current transformer DC voltage control flag bit be the second setting value, the correspondence service entrance switch is controlled to be
Divide position, this TV station flexibility current transformer switches to VF operational modes；
1.3：During incoming power fault recovery, corresponding service entrance switch is controlled to close position, corresponding flexible current transformer switches to PQ
Operational mode.
Further, the step (2) is specially：
2.1：Each bus connection switch state in detecting system；
2.2：When occurring causing the ac bus dead electricity by any mother failure, if the direct current of corresponding flexible current transformer
When voltage-controlled flag bit processed is the first setting value, then it is point position to control corresponding service entrance switch, starts another flexible current transformer, makes it
DC bus-bar voltage is controlled in DC voltage control pattern, this TV station flexibility current transformer switches to VF operational modes, is dead electricity
Bus provides uninterrupted power source；If corresponding flexible current transformer DC voltage control flag bit is the second setting value, control is corresponding
For service entrance switch to divide position, this TV station flexibility current transformer switches to VF operational modes；
2.3：During bus connection switch fault recovery, control corresponding to service entrance switch to close position, corresponding flexible current transformer switches to
PQ operational modes.
Further, the step (3) is specially：
3.1：The state of each flexible current transformer in detecting system；
3.2：Any flexible current transformer failure locking, if its DC voltage control flag bit is the first setting value, is opened
Another flexible current transformer is moved, is at DC voltage control pattern to control DC bus-bar voltage, guarantee system is normally transported
OK；If its DC voltage control flag bit is the second setting value, on system operation without influence, do not deal with；
3.3：During flexible current transformer fault recovery, start flexible current transformer and operate in PQ operational modes.
Further, first setting value is 1, represents flexible current transformer and operates under DC voltage control pattern；The
Two setting values are 0, represent flexible current transformer and do not operate under DC voltage control pattern.
Beneficial effects of the present invention：
A kind of flexible supplying power allocation system failure control method of the present invention, when there is incoming power failure, mother failure
Or during PCS failures, realize system stable operation under fault condition and ensure uninterrupted power supply；During fault recovery, realize automatically extensive
Multiple running status.A whole set of electric power system is relatively reliable, flexible.
Brief description of the drawings
Fig. 1 is the flexible supplying power allocation system schematic of an embodiment of the present invention；
Fig. 2 is the incoming power faulty control unit flow chart of an embodiment of the present invention；
Fig. 3 is the mother faulty control unit flow chart of an embodiment of the present invention；
Fig. 4 is the PCS faulty control unit flow charts of an embodiment of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
The application principle of the present invention is explained in detail below in conjunction with the accompanying drawings.
As shown in figure 1, the invention discloses a kind of flexible supplying power allocation system failure control method, described flexible distribution
Electric power system includes n platform flexibility current transformer PCS, n bar incoming power S, n section ac bus AC_Bus, (n-1) individual mother is opened
Close, n service entrance switch CB and 1 dc bus DC_Bus, the both ends of the flexible current transformer connect dc bus and right respectively
The ac bus answered, it is connected by bus connection switch between adjacent ac bus；Each service entrance switch is separately positioned on corresponding flexibility
Between current transformer and incoming power；Specifically include following steps：
(1) when there is incoming power failure, the incoming power in flexible supplying power allocation system failure control unit is utilized
Faulty control unit maintains system stable, and control realizes that power failure ac bus recovers normal power supply；
As shown in Fig. 2 when it is implemented, due to the corresponding station power distribution transformer of distribution network source, such as transformer capacity
800kVA, long-term load 1000kVA, then 2 distribution transformings of selection input just, stop transport by unnecessary distribution, reduces the unloaded damage of distribution
Consumption, therefore, can initially put into m incoming power according to loading condition, system；When system detectio to incoming power SjFailure
When：
First determine whether PCS corresponding to the inlet wirejDC voltage control flag bit Udc_Ctl_flag whether be 1, if
Udc_Ctl_flag=1, then control service entrance switch CBjTo divide position, while i-th of PCS switches to DC voltage control Udc_Ctl
Pattern (i.e. PCSiFor running status), PCSjSwitch to VF operational modes, there is provided uninterrupted power source；If Udc_Ctl_flag=0,
Then control service entrance switch CBjTo divide position, PCSjSwitch to VF operational modes (i.e. electric voltage frequency pattern), there is provided uninterrupted power source.This
When, system operation is in m-1 incoming power operation operating mode.Work as SjFault recovery, when meeting service condition, PCSjRealize same period work(
Can, close service entrance switch CBj, PCSjIt is incorporated into the power networks, system reverts to m bar incoming power operation operating modes, and above-mentioned i is integer, 1≤i
≤ n, i ≠ j.
(2) when there is mother failure, the mother Fault Control in flexible supplying power allocation system failure control unit is utilized
Unit maintains system stable, and control realizes that power failure ac bus recovers normal power supply；
Shown in Fig. 3, system initially puts into m incoming power, then corresponds to and close (n-m) individual bus connection switch, system detectio arrives
CFjNeed to judge jth section ac bus AC_Bus after failurejDead electricity or AC_Bus(j+1)Dead electricity.If AC_BusjDead electricity, then
Judge PCSjUdc_Ctl_flag whether be 1；If Udc_Ctl_flag=1, it is ensured that CFjTo divide position, PCSiSwitch to direct current
Voltage control Udc_Ctl patterns (PCSiFor running status), PCSjSwitch to VF operational modes, there is provided uninterrupted power source；If
Udc_Ctl_flag=0, it is ensured that CFjTo divide position, PCSjSwitch to VF operational modes, there is provided uninterrupted power source.If AC_
Bus(j+1)Dead electricity, then judge PCS(j+1)Udc_Ctl_flag whether be 1；If Udc_Ctl_flag=1, it is ensured that CFjTo divide
Position, while PCSiSwitch to DC voltage control Udc_Ctl patterns, PCS(j+1)Switch to VF operational modes, there is provided uninterrupted electricity
Source；If Udc_Ctl_flag=0, it is ensured that CFjTo divide position, while PCS(j+1)Switch to VF operational modes, there is provided uninterrupted electricity
Source.Now, system operation is in (n-m-1) individual female joint bit operating condition.Work as CFjFault recovery, when meeting service condition, failure
Operating mode is if AC_BusjDead electricity, then PCSjComplete synchronization function and close CFjSwitch, PCSjSwitch to PQ patterns (i.e. active
Idle operational mode)；Fault condition is if AC_Bus(j+1)Dead electricity, then PCS(j+1)Complete synchronization function and close CFj switches,
PCS(j+1)Switch to PQ patterns.System recovers m incoming power operation operating mode.Above-mentioned i is integer, 1≤i≤n, i ≠ j, i ≠ j+
1。
(3) when there is flexible current transformer failure, the current transformer in flexible supplying power allocation system failure control unit is utilized
Faulty control unit maintains system stable.
Shown in Fig. 4, when it is implemented, according to loading condition, system initially puts into m incoming power, then corresponds to and start m platforms
PCS.System detectio is to PCSjDuring failure, PCS is first determined whetherjUdc_Ctl_flag whether be 1.If Udc_Ctl_flag=
1, i-th of PCS switch to Udc_Ctl patterns (PCSiFor running status) stable DC busbar voltage, while ensure PCSjTo shut down
State；If Udc_Ctl_flag=0, it is ensured that PCSjIt is out of service for stopped status.Now, common (m-1) the platform PCS fortune of system
OK.Work as PCSjFault recovery, when meeting entry condition, start PCSj, PQ patterns are operated in, system reverts to m platforms PCS operation works
Condition.Above-mentioned i is integer, 1≤i≤n, i ≠ j.
In summary：
A kind of flexible supplying power allocation system failure control method of the present invention, when there is incoming power failure, mother failure
Or during flexible current transformer failure, realize system stable operation under fault condition and ensure uninterrupted power supply；During fault recovery, automatically
Realization is resumed operation state.A whole set of electric power system is relatively reliable, flexible.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (7)
1. a kind of flexible supplying power allocation system failure control method, described flexible supplying power allocation system includes the flexible change of n platforms
Flow device, n bars incoming power, n sections ac bus, (n-1) individual bus connection switch, n service entrance switch and dc bus, the flexible change
The both ends of stream device connect dc bus and corresponding ac bus respectively, are connected between adjacent ac bus by bus connection switch；
Each service entrance switch be separately positioned on corresponding between flexible current transformer and incoming power；Characterized in that, following steps：
(1) when there is incoming power failure, the incoming power failure in flexible supplying power allocation system failure control unit is utilized
Control unit maintains system stable, and control realizes that power failure ac bus recovers normal power supply；
(2) when there is mother failure, the mother faulty control unit in flexible supplying power allocation system failure control unit is utilized
Maintenance system is stable, and control realizes that power failure ac bus recovers normal power supply；
(3) when there is flexible current transformer failure, the current transformer failure in flexible supplying power allocation system failure control unit is utilized
Control unit maintains system stable.
A kind of 2. flexible supplying power allocation system failure control method according to claim 1, it is characterised in that：The flexibility
According to load and incoming power amount of capacity under supplying power allocation system accidental conditions, m bars incoming power input is selected
Operation, it is corresponding to start m platform flexibility current transformers, close (n-m) individual bus connection switch, m is integer, 1≤m≤n.
A kind of 3. flexible supplying power allocation system failure control method according to claim 1 or 2, it is characterised in that：N is whole
Number, and n >=2.
A kind of 4. flexible supplying power allocation system failure control method according to claim 1, it is characterised in that：The step
(1) it is specially：
1.1：Each incoming power state in detecting system；
1.2：When there is any incoming power failure, if the DC voltage control flag bit of corresponding flexible current transformer sets for first
During definite value, then it is point position to control corresponding service entrance switch, starts another flexible current transformer, is at DC voltage control pattern
To control DC bus-bar voltage, this TV station flexibility current transformer switches to VF operational modes, and uninterrupted electricity is provided for failure ac bus
Source；If corresponding flexible current transformer DC voltage control flag bit is the second setting value, it is point position to control corresponding service entrance switch,
This TV station flexibility current transformer switches to VF operational modes；
1.3：During incoming power fault recovery, corresponding service entrance switch is controlled to close position, corresponding flexible current transformer switches to PQ to run
Pattern.
A kind of 5. flexible supplying power allocation system failure control method according to claim 1, it is characterised in that：The step
(2) it is specially：
2.1：Each bus connection switch state in detecting system；
2.2：When occurring causing the ac bus dead electricity by any mother failure, if the direct current of corresponding flexible current transformer is voltage-controlled
When flag bit processed is the first setting value, then it is point position to control corresponding service entrance switch, starts another flexible current transformer, is at
DC voltage control pattern controls DC bus-bar voltage, and this TV station flexibility current transformer switches to VF operational modes, be dead electricity bus
Uninterrupted power source is provided；If corresponding flexible current transformer DC voltage control flag bit is the second setting value, corresponding inlet wire is controlled
Switch and switch to VF operational modes for a point position, this TV station flexibility current transformer；
2.3：During bus connection switch fault recovery, control corresponding to service entrance switch to close position, corresponding flexible current transformer switches to PQ to transport
Row mode.
A kind of 6. flexible supplying power allocation system failure control method according to claim 1, it is characterised in that：The step
(3) it is specially：
3.1：The state of each flexible current transformer in detecting system；
3.2：Any flexible current transformer failure locking, if its DC voltage control flag bit is the first setting value, start another
One flexible current transformer, DC voltage control pattern is to control DC bus-bar voltage, ensures system normal operation；Such as
Its DC voltage control flag bit of fruit is the second setting value, then system operation is not dealt with without influence；
3.3：During flexible current transformer fault recovery, start flexible current transformer and operate in PQ operational modes.
7. a kind of flexible supplying power allocation system failure control method according to any one of claim 4-6, its feature exist
In：First setting value is 1, represents flexible current transformer and operates under DC voltage control pattern；Second setting value is 0, generation
Table flexibility current transformer is not operated under DC voltage control pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711000000.1A CN107591877B (en) | 2017-10-24 | 2017-10-24 | Fault control method for power supply system of flexible distribution network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711000000.1A CN107591877B (en) | 2017-10-24 | 2017-10-24 | Fault control method for power supply system of flexible distribution network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107591877A true CN107591877A (en) | 2018-01-16 |
| CN107591877B CN107591877B (en) | 2020-06-09 |
Family
ID=61044096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711000000.1A Active CN107591877B (en) | 2017-10-24 | 2017-10-24 | Fault control method for power supply system of flexible distribution network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107591877B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110752595A (en) * | 2019-09-10 | 2020-02-04 | 国电南瑞科技股份有限公司 | Power distribution station fault support method and device based on flexible decision strategy |
| CN111313539A (en) * | 2020-02-26 | 2020-06-19 | 安徽中电兴发与鑫龙科技股份有限公司 | Automatic switching device and method for spare power automatic switching bus coupler fault of PLC |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201234136Y (en) * | 2008-07-16 | 2009-05-06 | 苏州凯达电器仪表成套有限公司 | Dual power source electricity supply system |
| CN102231564A (en) * | 2011-07-12 | 2011-11-02 | 南京中德保护控制系统有限公司 | Stand-by power supply automatic switch method for multi-stage series connection power supply network |
| CN107039965A (en) * | 2017-05-16 | 2017-08-11 | 南京南瑞继保电气有限公司 | A kind of community's supplying power allocation system |
-
2017
- 2017-10-24 CN CN201711000000.1A patent/CN107591877B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201234136Y (en) * | 2008-07-16 | 2009-05-06 | 苏州凯达电器仪表成套有限公司 | Dual power source electricity supply system |
| CN102231564A (en) * | 2011-07-12 | 2011-11-02 | 南京中德保护控制系统有限公司 | Stand-by power supply automatic switch method for multi-stage series connection power supply network |
| CN107039965A (en) * | 2017-05-16 | 2017-08-11 | 南京南瑞继保电气有限公司 | A kind of community's supplying power allocation system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108539776B (en) * | 2018-05-10 | 2021-05-07 | 国网江苏省电力有限公司徐州供电分公司 | Coordination control method for low-voltage flexible distribution network power supply system |
| CN110752595A (en) * | 2019-09-10 | 2020-02-04 | 国电南瑞科技股份有限公司 | Power distribution station fault support method and device based on flexible decision strategy |
| CN110752595B (en) * | 2019-09-10 | 2021-09-10 | 国电南瑞科技股份有限公司 | Power distribution station fault support method and device based on flexible decision strategy |
| CN111313539A (en) * | 2020-02-26 | 2020-06-19 | 安徽中电兴发与鑫龙科技股份有限公司 | Automatic switching device and method for spare power automatic switching bus coupler fault of PLC |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107591877B (en) | 2020-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109066686B (en) | Flexible switch station interconnection structure with comprehensive distribution of various electric energy | |
| CN110867884B (en) | Energy consumption module, offshore wind power flexible direct current outgoing system and fault ride-through strategy | |
| CN107546844A (en) | A kind of electric power electric transformer concatenated power module redundancy fault tolerant control method | |
| CN102396130A (en) | Uninterruptible power supply system | |
| CN108923409A (en) | DC power-supply system | |
| CN107591877A (en) | A kind of flexible supplying power allocation system failure control method | |
| EP1974432A1 (en) | A converter station | |
| WO2014201809A1 (en) | Uninterrupted direct current deicing device | |
| CN103001254A (en) | Alternating current and direct current hybrid micro-grid system | |
| CN207320834U (en) | A kind of circuit topological structure of alternating current-direct current mixing distribution system | |
| CN107919809A (en) | A kind of energy accumulation current converter system and its control method | |
| CN108879698A (en) | A kind of medium voltage distribution network dual ring topology structure comprising four port flexible switch | |
| CN112103938B (en) | Power supply architecture, method and system based on HVDC equipment | |
| CN206077059U (en) | A kind of terminal lightning protection HVDC no-break power unit | |
| KR20210094630A (en) | Flexible connection substation and control method | |
| CN101714776B (en) | 10KV station electric control system of convertor station adopting selecting 2 from 3 logic | |
| CN107171270B (en) | Intensive deicing device constant current, constant pressure modularization dynamic passive compensation component | |
| CN202772656U (en) | Standby power supply online device | |
| CN104485730B (en) | Take over seamlessly the circuit of power supply | |
| JP6938576B2 (en) | Systems and methods for efficient power supply and backup | |
| CN105759702A (en) | Monitor method and system for DC power grid demonstration system | |
| CN200979995Y (en) | A direct current non-breaking power supply system used by information network equipment | |
| CN102751781A (en) | Stand-by power supply on-line device | |
| CN211908370U (en) | Data center power supply system | |
| CN115360713B (en) | Flexible switching method of factory interconnection power distribution 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 |