CN207518284U - A kind of accident disconnection device of small power incorporating into power network - Google Patents
A kind of accident disconnection device of small power incorporating into power network Download PDFInfo
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- CN207518284U CN207518284U CN201721273776.6U CN201721273776U CN207518284U CN 207518284 U CN207518284 U CN 207518284U CN 201721273776 U CN201721273776 U CN 201721273776U CN 207518284 U CN207518284 U CN 207518284U
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- 238000005070 sampling Methods 0.000 claims abstract description 13
- 230000003993 interaction Effects 0.000 claims abstract description 6
- 230000000903 blocking effect Effects 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 3
- 239000013307 optical fiber Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000000875 corresponding effect Effects 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
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- 238000001914 filtration Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
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- 238000010248 power generation Methods 0.000 description 1
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Abstract
The utility model provides a kind of accident disconnection device of small power incorporating into power network, for connect power grid and small power supply and under given conditions small power supply from power grid off-the-line, include the electrical parameter sampling module of the connection power grid, the data operation processing module of the connection electrical parameter sampling module, the control output module of the connection data operation processing module and the connection human-computer interaction unit for controlling output module.A kind of accident disconnection device of small power incorporating into power network provided by the utility model ensures effectively excision accident, prevents safety device tripping, reduce accident range.
Description
Technical field
The utility model is related to apply the accident off-the-line in the field of small power incorporating into power network more particularly to a kind of small power incorporating into power network
Device.
Background technology
Small power supply system is important component indispensable in electric system, and a large amount of small power stations pass through 10kV common lines
Road net.As country vigorously supports photovoltaic distributed power supply, small power supply online problem encountered will be protruded more.
The general T of small power supply is connected to 10kV public lines or is directly accessed 110kV substations 10kV intervals.After small power supply power generation, pass through
Main transformer boosts or is directly directly dissolved by 10kV circuits.When 110kV supply lines of 110kV substations dead electricity
When, since 10kV busbares are connected to small power supply system, voltage is counter to be sent to main transformer high-pressure side so that 110kV busbares charge.It is based on
Power supply backup auto-activating device (the automatic throw-in equipment of emergency power supply, by main power source, standby in substation is configured in above-mentioned reason
With the differentiation of the conditions such as supply voltage and mains current come judge main power source whether failure, and confirming failure main power source
Automatic put-in spair power source after isolation to ensure the continuous power supply to user, improves stability.) tripping will be caused (to break down
Shi Kaiguan is failure to actuate) so that 110kV substations lose main power supply, so as to expand accident range, lead to no-voltage of entire station (voltage
It is insufficient) happen.
Utility model content
The purpose of this utility model is to provide a kind of accident disconnection device of Miniature Power Unit access power grid, which ensures
Effectively excision accident, prevents safety device tripping, reduces accident range.
To achieve the above object, the technical solution of the utility model is realized in：A kind of small power incorporating into power network accident solution
Array apparatus includes electrical parameter sampling module, data operation processing module, control output module and human-computer interaction unit.The electricity
Parameter sampling module is used to acquire voltage parameter, current parameters, frequency parameter and the position of the switch of power grid, and will sampling gained
To data be sent to the data operation processing module；The data operation processing module is used for the electrical parameter sampling module
It samples obtained data to be analyzed and logical process, so as to which the state current to the power grid judges；The control
The handling result of the data operation processing module is exported and performed by output module processed, the small power supply and institute after failure generation
State grid disconnection；The human-computer interaction unit can realize related data, the state of checking, set related definite value parameter function；It is described
Small power incorporating into power network accident disconnection device use two CSTR control core, and when optical fiber B codes pair by way of, ensure the time
Accuracy and uniqueness.
Further, the data operation processing module includes zero sequence overvoltage off-the-line, low pressure off-the-line, over-pressed off-the-line, low frequency solution
Row and high frequency off-the-line, each off-the-line, which can independently be thrown, moves back.
The beneficial effects of the utility model：(1) the utility model provides a kind of accident disconnection device of small power incorporating into power network, can
With power grid occur a variety of unfavorable conditions when, quickly and accurately make corresponding judgement, when the grid collapses small power supply from
Solution is listed in power grid, so as to avoid the range of expansion accident.(2) by the way of the utility model is when optical fiber B codes pair, ensure
Accurate unified time reference can recur the feelings of failure within grid collapses and operation, particularly short time
Under condition, it is easily analyzed the reason of studying failure, the substantially process that the type of failure, failure occur, this protects crash analysis
Demonstrate,prove safe operation of power system important in inhibiting；(3) the utility model uses two CSTR control core technology, one of DSP
As master controller, it is responsible for the sampling of the network voltage, electric current, filtering, FFT operations and control in real time, and will processing
Obtained result is stored in dual port RAM, another DSP is used as from controller and data are obtained from dual port RAM, realizes corresponding real
When control, achieve the purpose that human-computer interaction.
Description of the drawings
Fig. 1 is the block diagram of the utility model small power incorporating into power network accident disconnection device.
Fig. 2 is zero sequence overvoltage off-the-line logic diagram in the data operation processing module of the utility model.
Fig. 3 is the data operation processing module mesolow off-the-line logic diagram of the utility model.
Fig. 4 is off-the-line logic diagram over-pressed in the data operation processing module of the utility model.
Fig. 5 is low frequency off-the-line logic diagram in the data operation processing module of the utility model.
Fig. 6 is the data operation processing module medium-high frequency off-the-line logic diagram of the utility model.
Specific embodiment
Further to illustrate technical solution adopted in the utility model and its effect, below in conjunction with the utility model
Preferred embodiment and its attached drawing are described in detail.
As shown in Figure 1, a kind of accident disconnection device 2 of small power incorporating into power network is used to connect power grid 1 and small power supply 3, and supervising
When measuring power grid 1 and breaking down, small power supply 3 from power grid 1 off-the-line.
A kind of accident disconnection device 2 of small power incorporating into power network includes electrical parameter sampling module 4, data operation processing module
5th, output module 6 and human-computer interaction unit 7 are controlled.The electrical parameter sampling module 4 acquires the power grid 1 by collector and runs
Status data, comprising voltage, electric current and frequency, and by collected data transmission to the data operation processing module 5；Institute
It is low including over-pressed 91, two sections of the off-the-lines of two sections of 8, two sections of zero sequence overvoltage off-the-line, 9, two sections of low pressure off-the-lines to state data operation processing module 5
Frequency off-the-line 10 and two sections of high frequency off-the-lines 11, the data operation processing module 5 to the information acquired analyzed and patrolled
Processing is collected, and then the correlated condition of current power grid 1 is judged；Output module 6 is controlled by handling result finally by described
Output performs, small power supply 3 and 1 off-the-line of power grid；The man-machine exchange unit 7 can realize the data for checking power grid 1, state, if
Put the function of related definite value parameter.
As shown in Fig. 2, the data operation processing module 5 is provided with two sections of zero sequence overvoltage off-the-lines 8, two sections of zero sequence mistakes
Pressure off-the-line 8, which can independently be thrown, moves back, and each section of residual voltage and time definite value can be adjusted independently.After performing off-the-line action, off-the-line outlet connects
Auto-returned after point action 400ms.
As shown in figure 3, the data operation processing module 5 is additionally provided with two sections of low pressure off-the-lines 9, two sections of low pressure off-the-lines
9 can independently throw and move back, and each section of voltage and time definite value can be adjusted independently.9 element movement of low pressure off-the-line is had to through once having
Pressure judges, after 9 element movement of low pressure off-the-line return, also to pass through once has pressure to judge, can act again.Off-the-line exports
Auto-returned after contact action 400ms.The low pressure off-the-line 9 is set through current interlock, and the current interlock may be configured as low current
Locking or overcurrent locking.When low current, which is latched, to be put into, any phases line voltage is less than definite value and any phase current is more than definite value
When, perform the action of low pressure off-the-line；When having served as current interlock input, any phases line voltage is less than definite value and three-phase current is respectively less than and determines
During value, the action of low pressure off-the-line is performed.It is put into overcurrent locking if low current is latched, which closes without overcurrent
Lock, as long as meeting any phases line voltage less than definite value, you can action；If low current is exited with overcurrent locking, the low pressure solution
9 element of row, which exits, is failure to actuate.
As shown in figure 4, the data operation processing module 5 is additionally provided with two sections of over-pressed off-the-lines 91, two sections of overvoltages solution
Row 91 can independently be thrown and move back, and each section of voltage and time definite value can be adjusted independently.Auto-returned after off-the-line outlet junctions action 400ms.
As shown in figure 5, the data operation processing module 5 is additionally provided with two sections of low frequency off-the-lines 10, two sections of low frequency solutions
Row 10 can independently be thrown and move back, and each section of low frequency and time definite value can be adjusted independently.Auto-returned after off-the-line outlet junctions action 400ms.
The low frequency off-the-line 10 sets blocking device, the blocking device include can throwing back skating difference blocking device, low-voltage lockout device,
Can throw to move back transfinites blocking device without stream blocking device and frequency measurement.When system jam causes frequency drastically to decline or be
When system and PT loop fault transient processes cause voltage waveform distortion, input, which can throw back skating difference blocking device, can prevent low frequency off-the-line
10 malfunctions.The low-voltage lockout device can prevent other abnormal conditions in PT broken strings and PT circuits, when Uab is closed less than low-voltage
During locking device definite value, it is latched low frequency off-the-line function.It is described throw move back without stream locking can prevent busbar from losing power supply after, by motor
The frequency anomaly that feedback voltage measures when three-phase current, which is respectively less than, is latched definite value without stream, is latched low frequency off-the-line function.Due to dress
It puts frequency measurement and is derived from busbar voltage Uab, when input voltage Uab is less than 15V or measurement frequency beyond the effective models of 45~55Hz
It encloses, device is considered as frequency measurement circuit exception, instantaneous to be latched low frequency off-the-line function.
As shown in fig. 6, the data operation processing module 5 is additionally provided with two sections of high frequency off-the-lines, two sections of high frequency off-the-lines
It can independently throw and move back, each section of high frequency and time definite value can be adjusted independently.Auto-returned after off-the-line outlet junctions action 400ms.This two
Section high frequency off-the-line, which is each equipped with frequency measurement, to transfinite blocking function.
Claims (5)
1. a kind of accident disconnection device of small power incorporating into power network, for connection or off-the-line power grid (1) and small power supply (3), feature
It is：Including connecting the electrical parameter sampling module (4) of the power grid (1), the data fortune of the connection electrical parameter sampling module (4)
It is defeated to calculate processing module (5), the control output module (6) of the connection data operation processing module (5) and the connection control
Go out the human-computer interaction unit (7) of module (6), electrical parameter sampling module (4) the setting voltage collector, current collector and frequency
Rate collector acquires the voltage, electric current and frequency parameter data of the power grid.
2. a kind of accident disconnection device of small power incorporating into power network according to claim 1, it is characterised in that：The data operation
Processing module (5) includes zero sequence overvoltage off-the-line (8), low pressure off-the-line (9), over-pressed off-the-line (91), low frequency off-the-line (10) and high-frequency solution
It arranges (11), independently throws and move back between each off-the-line.
3. a kind of accident disconnection device of small power incorporating into power network according to claim 2, it is characterised in that：The low pressure off-the-line
(9) current interlock is set, when putting into current interlock, by the way that the voltage value of any phase line, current value compared with definite value, are judged
Perform the action of low pressure off-the-line.
4. a kind of accident disconnection device of small power incorporating into power network according to claim 2, it is characterised in that：The low frequency off-the-line
(10) set blocking device and pass through by the electrical parameter sampling module (4) collected system or circuit electric data and phase
Definite value is answered to compare, judges to perform the off-the-line action of locking low frequency.
5. a kind of accident disconnection device of small power incorporating into power network according to claim 1, it is characterised in that：A kind of small electricity
Mode when the grid-connected accident disconnection device setting two CSTR control core in source and optical fiber B codes pair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721273776.6U CN207518284U (en) | 2017-09-29 | 2017-09-29 | A kind of accident disconnection device of small power incorporating into power network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721273776.6U CN207518284U (en) | 2017-09-29 | 2017-09-29 | A kind of accident disconnection device of small power incorporating into power network |
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| CN207518284U true CN207518284U (en) | 2018-06-19 |
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| CN201721273776.6U Expired - Fee Related CN207518284U (en) | 2017-09-29 | 2017-09-29 | A kind of accident disconnection device of small power incorporating into power network |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110707669A (en) * | 2019-10-31 | 2020-01-17 | 南京南瑞继保电气有限公司 | Method and device for controlling filter bank of magnetically controlled high-voltage shunt reactor in circuit reclosing |
| CN114465214A (en) * | 2022-03-17 | 2022-05-10 | 国网浙江省电力有限公司宁波供电公司 | Fault splitting configuration method based on 5G communication technology |
-
2017
- 2017-09-29 CN CN201721273776.6U patent/CN207518284U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110707669A (en) * | 2019-10-31 | 2020-01-17 | 南京南瑞继保电气有限公司 | Method and device for controlling filter bank of magnetically controlled high-voltage shunt reactor in circuit reclosing |
| CN114465214A (en) * | 2022-03-17 | 2022-05-10 | 国网浙江省电力有限公司宁波供电公司 | Fault splitting configuration method based on 5G communication technology |
| CN114465214B (en) * | 2022-03-17 | 2024-05-14 | 国网浙江省电力有限公司宁波供电公司 | Fault disconnection configuration method based on 5G communication technology |
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| CF01 | Termination of patent right due to non-payment of annual fee |