CN207691414U - A kind of high pressure protector - Google Patents
A kind of high pressure protector Download PDFInfo
- Publication number
- CN207691414U CN207691414U CN201721334335.2U CN201721334335U CN207691414U CN 207691414 U CN207691414 U CN 207691414U CN 201721334335 U CN201721334335 U CN 201721334335U CN 207691414 U CN207691414 U CN 207691414U
- Authority
- CN
- China
- Prior art keywords
- protection
- main transformer
- switch board
- transformers
- high pressure
- 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.)
- Expired - Fee Related
Links
- 230000001012 protector Effects 0.000 title claims abstract description 25
- 230000004224 protection Effects 0.000 claims abstract description 91
- 238000005259 measurement Methods 0.000 claims abstract description 16
- 230000001681 protective effect Effects 0.000 abstract description 11
- 238000009434 installation Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model provides a kind of high pressure protector; switch board including main transformer; protection screen is set on the switch board, the differential protection unit being connect with the main transformer, back-up protection and measurement and control unit, the low back-up protection of main transformer and measurement and control unit and non-ionizing energy loss unit are set on the protection screen.According to the actual conditions of workshop high voltage protective the high voltage protective to 35KV, 6KV transformer is completed by installing protection location on the switch board of the main transformer of existing high-pressure installation.Protective device realizes the function that various existing relay protections are unable to reach using software programming, has very strong flexibility.
Description
Technical field
The utility model is related to tranformer protection technical fields, and in particular to a kind of high pressure protector.
Background technology
What high pressure protector was protected is the electrical components of high-voltage board, when electric device failure or abnormal work shape
When state, the device can it is automatic, rapid, effectively cut off failure original paper, ensure fault-free circuit normal operation.For example, in circuit
It plays a protective role when short circuit, open circuit or phase shortage.The stable operation of power grid is therefore the most important condition of production stable and antegrade is wanted
The high pressure protector dependable performance of power grid is asked to stablize.
In actual production, electric current undergoes following change electric process before the equipment for entering workshop：The power transformation of the village Chen Jia
Institute --- 35KV high-voltage boards --- 1# 2# main transformers --- 6KV high-voltage boards --- rectifier transformer or power transformation
Device --- onsite application voltage.1# and 2# main transformers are the step-down transformers that 35KV is converted to 6KV, two the using and the reserved, one
It breaks down, another comes into operation.6KV high pressures are depressured to onsite application using rectifier transformer or power transformer
The voltage of 600-400V.Exchange is become direct current by rectifier transformer, and supply In situ DC motor uses, and power transformer is supply
Onsite power cabinet uses voltage.
Currently, workshop high voltage protective still uses relay protection, with the extension of operation hours, relay protection
Device setting valve is easy to happen variation, cannot provide reliable defencive function.Moreover, constantly carrying with workshop production capacity
The potentiality of height, equipment constantly play, and corresponding machine utilization increases, and current protective relaying device does not adapt to currently set
Standby state.Once protective device breaks down, especially the protective device of transformer, replacement debugging process is extremely complex, will
The stable smooth operation of production can significantly be influenced.
In conclusion how to realize that the high voltage protective performance for promoting power grid is a problem to be solved.
Utility model content
The utility model provides a kind of high pressure protector, to solve protection of the existing the means of relay protection to transformer
The poor problem of ability.
The utility model provides a kind of high pressure protector, includes the switch board of main transformer, is set on the switch board
Protection screen is set, the differential protection unit being connect with the main transformer, back-up protection and observing and controlling list are set on the protection screen
Member, the low back-up protection of main transformer and measurement and control unit and non-ionizing energy loss unit.
Preferably, in above-mentioned high pressure protector, the main transformer includes using main transformer and spare main transformer,
It is described using being both provided with the protection screen on the switch board of main transformer and spare main transformer.
Preferably, further include the unit by being arranged on fieldbus and the protection screen in above-mentioned high pressure protector
The standby microcomputer being electrically connected.
Preferably, further include that the 35KV being electrically connected with the input terminal of the main transformer becomes in above-mentioned high pressure protector
Depressor, the switch board of the 35KV transformers are electrically connected with the standby microcomputer.
Preferably, further include the 6KV transformations being electrically connected with the output end of the main transformer in above-mentioned high pressure protector
Device, the switch board of the 6KV transformers are electrically connected with the standby microcomputer.
Preferably, in above-mentioned high pressure protector, further include central equipment screen, be provided with difference on the central equipment screen
It is electrically connected with the switch board of the switch board of the main transformer, the switch board of the 35KV transformers and the 6KV transformers
Control module.
Preferably, in above-mentioned high pressure protector, the control module includes 35KV transformer incoming relay-protection control modules,
The 35KV transformers incoming relay-protection control module is electrically connected with the switch board of 35KV transformers, the ends of incoming cables observing and controlling 35KV parameter.
As it can be seen that high pressure protector provided by the utility model passes through according to the actual conditions of workshop high-pressure installation
Protection location is installed on the switch board of the main transformer of existing high-pressure installation, completes to protect the high pressure of 35KV, 6KV transformer
Shield.Protective device realizes the function that various existing relay protections are unable to reach using software programming, has very strong flexibility.
Description of the drawings
Fig. 1 is the structure diagram of high pressure protector provided by the utility model.
Specific implementation mode
As shown in Figure 1, high pressure protector provided by the utility model, includes the switch board of main transformer, the control
Protection screen is set on cabinet, be arranged on the protection screen differential protection unit being connect with the main transformer, back-up protection and
The low back-up protection of measurement and control unit, main transformer and measurement and control unit and non-ionizing energy loss unit.Illustrate the protection of protection location separately below
Process.
(1) main transformer differential protection unit, fast differential over current protection function and two are installed on main transformer protection screen
The biased differential protection (band CT breakage lock devices function) of subharmonic braking is as follows：
1.1 fast differential over current protection
Differential protection unit detects any phase difference current of main transformer in real time, is flowed when any phase difference current is more than difference
When quick-break definite value, snap action is in exit relay.The protection can be fast when catastrophe failure occurs for 1# 2# main transformers portion
Speed excision failure transformer.
The biased differential protection (band CT breakage lock devices function) of 1.2 secondary harmonic brakes
1.2.1 percentage differential acting characteristic
The protection uses split-phase type, i.e. any phase protection act outlet A, B, C, following criterion is by taking a phase as an example.
I2cd ＜ K2*Iced (2)
When formula (1) (2) while percentage differential element protection action when setting up.Wherein：Isd is quick-break current ration,
Icdqd is differential protection door definite value, and Izd is stalling current, takes each side with phase maximum current, and K is ratio brake
Characteristic slope, K2 are secondary harmonic brake coefficient, and I2cd is the second harmonic component of difference current, and Icd is difference current, by difference
Dynamic protection location detects in real time.
1.2.2 secondary harmonic brake criterion
Secondary harmonic brake uses the principle of single-phase secondary harmonic brake rate of three phase flow differential protection, but if an only phase
There is second harmonic, detect three-phase difference current in real time by differential protection unit, when it crosses definite value, then differential protection acts.
In addition, including by the function that the differential protection unit can also be realized：CT breakage lock devices biased differential protection is simultaneously
Alarm, the alarm of difference stream, overload alarm, overload start air-cooled, overload locking on-load voltage regulation and main body protection signal.It is any of the above
Protection has switch, can put into and exit respectively.According to the actual conditions of workshop, certain protections therein can be selected
Function uses.
(2) the high back-up protection of main transformer and measurement and control unit are installed on main transformer protection screen.Its overload alerts and overload
It is as follows to be latched on-load voltage regulation protection process：
2.1 overloads alert
The high back-up protection of main transformer and measurement and control unit detect the Ihb electric currents of main transformer in real time：High-pressure side B phase currents.
Iset1：Overload alerts electric current；Tset2：Time setting value.
2.2 overload locking on-load voltage regulation
The high back-up protection of main transformer and measurement and control unit detect the Ihb electric currents of main transformer in real time：High-pressure side B phase currents.Iset3
For the protection seting electric current, Tset4For the protection seting time
When the high-pressure sides Ihb B phase currents are more than Iset1Or Iset4, it is more than the setting time Iset of setting2Or Iset4, main transformer
Depressor jumps electricity.
In addition, including by the defencive function that the high back-up protection of the main transformer and measurement and control unit can also be realized：At two section three
Limit composite voltage overcurrent protection (band direction), compound voltage lockout (can arbitrarily select high and low pressure side voltage or high and low pressure side
Voltage simultaneous selection), bus insulation monitoring (high and low pressure side bus), overcurrent start the alarm of air-cooled, CT broken string, PT broken string alarms
(high and low pressure side bus).Any of the above protection has switch, can put into and exit respectively.According to the actual conditions of workshop,
Certain defencive functions therein can be selected to use.
(3) the low back-up protection of main transformer and measurement and control unit are installed on main transformer protection screen.The protection of its PT broken string alarms
Process is as follows：
3.1PT broken string alarms
The low back-up protection of main transformer and measurement and control unit detect Uab and Ubc voltages in real time, if Uab Ubc voltages are less than PT
The voltage definite value of checkout voltage that breaks or Ia electric currents are alerted more than the electric current main transformer of CT inspection no flow setpoints and can all be alerted.So that life
Production personnel have found failure.
In addition, further including by the defencive function that the low back-up protection of the main transformer and measurement and control unit are realized：Two section of three time limit is multiple
Close voltage overcurrent protection (being latched with direction, negative sequence voltage, low-voltage lockout), bus insulation monitors, overcurrent starts air-cooled, overload
It is latched on-load voltage regulation, overload alarm and CT broken string alarms.Any of the above protection has switch, can put into and exit respectively.Root
According to the actual conditions of workshop, certain defencive functions therein can be selected to use.
(4) main transformer non-charge protection location is installed on main transformer protection screen.The protection location is grasped by 3 pieces of breakers
Make module and 1 piece of non-electrical restarting module composition, the following breaker operator module of two kinds of module functions, be suitable for 110KV and with
Lower breaker not split-phase breaker tripping and closing, and with anti-bouncing function.Breaker tripping and closing electric current is adaptive from 0.2A-6A.Non-electrical restarting module master
It is used for moving again for non-ionizing energy loss contact.There are four road non electrical quantity inputs, five tunnels tripping contact output, four road non-electric charge quantity signallings to connect
Point output.Two kinds of module functions are completely independent, and can arbitrarily be combined according to the requirement of work
As it can be seen that high pressure protector provided by the utility model passes through according to the actual conditions of workshop high-pressure installation
Protection location is installed on the switch board of the main transformer of existing high-pressure installation, completes to protect the high pressure of 35KV, 6KV transformer
Shield.Protective device realizes the function that various existing relay protections are unable to reach using software programming, has very strong flexibility.
In actual production, main transformer includes using main transformer 1# and spare main transformer 2#, described to use main transformer
The protection screen is both provided on the switch board of depressor and spare main transformer.Therefore, the connection of above-mentioned main transformer is differential
Protection location, back-up protection and measurement and control unit, the low back-up protection of main transformer and measurement and control unit and non-ionizing energy loss unit, in two masters
There is setting on the protection screen of transformer.
Workshop situation is grasped for the ease of operator on duty, standby microcomputer is arranged on above-mentioned protection screen by fieldbus
Unit be electrically connected, form one protection network, realize centralized control.Operator on duty can intuitively check the fortune of each equipment
Market condition.It is specific as shown, by be provided on central equipment screen respectively with the switch board of the main transformer, the 35KV
The control module of the switch board of the switch board of transformer and 6KV transformers electrical connection realizes centralized control functions.35KV
The switch board of transformer is electrically connected with the input terminal of main transformer and standby microcomputer electrical connection.The switch board of 6KV transformers
It is electrically connected with the output end of main transformer and the standby microcomputer.The control module includes 35KV transformer incoming relay-protection observing and controlling
Module, the 35KV transformers incoming relay-protection control module are electrically connected with the switch board of 35KV transformers, the ends of incoming cables observing and controlling 35KV
Parameter.
The control function of 35KV transformer incoming relay-protection control modules on central equipment screen is as follows, including three-phase (or two
Phase) formula three sect current protection (band after acceleration, low-voltage dead lock, direction protection), three-phase single shot reclosing (uncorresponding start-up, protection
Start, checkout voltage), low-frequency load shedding (band undercurrent be latched, slippage locking), zero-sequence voltage injection (apolegamy), low-voltage load sheding (band acceleration
Function), overload alarm, bus insulation monitoring, PT broken strings, CT break alarms, independent operation circuit and failure wave-recording.More than
Various protections have switch, can put into and exit respectively.
It is excellent that the protection screen of central equipment screen and main transformer all has human-computer interaction interface, can carry out operation data note
The advantages of record, failure logging.Record and one month operation data of retaining device under normal condition, and can call at any time；
Fault logging function is triggered when failure, various data, waveform before and after record failure provide the data foundation of handling failure.
The above is only specific embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these improve and
Retouching also should be regarded as the scope of protection of the utility model.
Claims (7)
1. high pressure protector, which is characterized in that protection screen is arranged on the switch board, institute in the switch board including main transformer
State be arranged on protection screen the differential protection unit being connect with the main transformer, back-up protection and measurement and control unit, main transformer it is low after
Standby protection and measurement and control unit and non-ionizing energy loss unit.
2. high pressure protector according to claim 1, which is characterized in that the main transformer includes using main transformer
It is described using being both provided with the protection screen on the switch board of main transformer and spare main transformer with spare main transformer.
3. high pressure protector according to claim 1, which is characterized in that further include by fieldbus and the protection
The standby microcomputer that the unit being arranged on screen is electrically connected.
4. high pressure protector according to claim 3, which is characterized in that further include the input terminal with the main transformer
The 35KV transformers of electrical connection, the switch board of the 35KV transformers are electrically connected with the standby microcomputer.
5. high pressure protector according to claim 4, which is characterized in that further include the output end with the main transformer
The 6KV transformers of electrical connection, the switch board of the 6KV transformers are electrically connected with the standby microcomputer.
6. high pressure protector according to claim 5, which is characterized in that further include that central equipment screen, the center are set
Be provided on standby screen respectively with the switch board of the main transformer, the switch board of the 35KV transformers and the 6KV transformers
Switch board electrical connection control module.
7. high pressure protector according to claim 6, which is characterized in that the control module include 35KV transformers into
Line protects control module, the 35KV transformers incoming relay-protection control module to be electrically connected with the switch board of 35KV transformers, observing and controlling
The ends of incoming cables 35KV parameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721334335.2U CN207691414U (en) | 2017-10-17 | 2017-10-17 | A kind of high pressure protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721334335.2U CN207691414U (en) | 2017-10-17 | 2017-10-17 | A kind of high pressure protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207691414U true CN207691414U (en) | 2018-08-03 |
Family
ID=62988150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721334335.2U Expired - Fee Related CN207691414U (en) | 2017-10-17 | 2017-10-17 | A kind of high pressure protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207691414U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107611930A (en) * | 2017-10-17 | 2018-01-19 | 山东钢铁股份有限公司 | A kind of high voltage protective system |
-
2017
- 2017-10-17 CN CN201721334335.2U patent/CN207691414U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107611930A (en) * | 2017-10-17 | 2018-01-19 | 山东钢铁股份有限公司 | A kind of high voltage protective system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202353172U (en) | Three-phase power supply automatic reclosure protector | |
| CN104882891A (en) | Low-voltage distribution voltage-regulation equipment | |
| CN110912114A (en) | High-safety low-voltage direct current system | |
| CN101702517B (en) | Energy-saving outdoor grid current limiting device | |
| CN106856332A (en) | A kind of distributed photovoltaic power generation grid-connected system | |
| CN109995015A (en) | 220KV two electricity two charging DC system | |
| CN110912109A (en) | Low-voltage direct-current power supply and distribution equipment and method | |
| CN103515956A (en) | Voltage switching automatic paralleling device | |
| CN107611930A (en) | A kind of high voltage protective system | |
| CN207691414U (en) | A kind of high pressure protector | |
| CN101295000A (en) | A test method for long-distance HVDC transmission transient overload | |
| CN204947341U (en) | Distribution becomes platform intelligent distribution box | |
| CN208874279U (en) | A kind of improved breaker body unbalanced three-phase lines outlet loop | |
| CN104749453B (en) | Reduce the method that outer net singlephase earth fault influences user's voltage dip | |
| CN206759031U (en) | A kind of improved power plant's low-voltage power supply system ground protection warning device | |
| CN214900263U (en) | Integrated mobile power supply device | |
| CN201562957U (en) | Energy-saving outdoor current limiter of electrical network | |
| CN204314645U (en) | A kind of low-voltage distribution system by screen break-make automaton | |
| CN107147081A (en) | A logic optimization method for transformer steady-state ratio differential protection | |
| CN203367840U (en) | Outdoor distribution transformer low-voltage protection switch box | |
| CN203813447U (en) | Substation High Voltage Reactive Power Automatic Compensation Device | |
| CN208420975U (en) | Dual power supply switching equipment testing auxiliary device | |
| CN106159879B (en) | A kind of combined mass circuit breaker system | |
| CN206542181U (en) | Intelligent non-pressure release coil controller | |
| CN222673672U (en) | Low-voltage grid-connected cabinet with fault-removal automatic reclosing function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180803 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |