CN205544333U - Electrified ability quality monitoring's anti - isolated island device - Google Patents
Electrified ability quality monitoring's anti - isolated island device Download PDFInfo
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- CN205544333U CN205544333U CN201620336846.7U CN201620336846U CN205544333U CN 205544333 U CN205544333 U CN 205544333U CN 201620336846 U CN201620336846 U CN 201620336846U CN 205544333 U CN205544333 U CN 205544333U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
The utility model discloses an electrified ability quality monitoring's anti - isolated island device, including quick -witted case and bus board, the bus board sets up at quick -witted incasement, be connected with the CPU plug -in components on the bus board, exchange collection plug -in components, IO plug -in components and operation circuit plug -in components, the CPU plug -in components respectively with exchange and gather plug -in components, IO plug -in components and operation circuit plug -in components control connection, the operation circuit plug -in components are connected with anti - isolated island return circuit in the photovoltaic circuit, exchange and gather plug -in components collection electric energy mass parameter, the IO plug -in components are connected with control device, control device passes through CPU plug -in components order -driven the operation circuit plug -in components, open / closing of anti - isolated island switch in the anti - isolated island return circuit of operation circuit plug -in components control. The utility model provides an among the prior art electric energy quality detection device and anti - isolated island device independently lay wire, cause the problem that the secondary circuit wiring is complicated, occupation space is big, the investment cost is big.
Description
Technical field
This utility model relates to parallel network power generation technical field, is specifically related to the anti-of a kind of band electric energy quality monitoring
Isolated island device.
Background technology
The quality of power supply includes frequency departure, voltage deviation, voltage fluctuation and flicker, three-phase imbalance, instantaneous
Or transient overvoltage, wave distortion (harmonic wave), voltage dip, interruption, temporarily liter and power supply continuity etc..
When the island phenomenon of photovoltaic system refers to electrical network decompression, photovoltaic plant still keeps certain in decompression electrical network
A part of circuit continues the state of power supply, and the upkeep operation on this circuit is constituted a serious threat by this state.
It is incorporated to power distribution network now with a large amount of distributed photovoltaics on the spot with 220V/380V, brings to the operation of power distribution network
Following impact: 1, distributed photovoltaic may cause the change of distribution network electric energy quality；2, stop at power distribution network
When electric-examination is repaiied, distributed photovoltaic may produce island phenomenon.Accordingly, it would be desirable to points of common connection PCC electric energy
Parameter (such as voltage, electric current, active power, reactive power, power factor etc.) is monitored, and takes precautions against
Island phenomenon.
In prior art, anti-islanding device mainly has passive type and active two kinds, and the former is by comparing PCC
(the point of common coupling) voltage at place, frequency and the size of setting valve, when virtual voltage, frequently
During rate deviation setting valve, tripping distributed photovoltaic power switchs, and then makes distributed photovoltaic depart from island state；
The latter is by arranging an interference resistance at PCC on bus, when islet operation, put into interference resistance,
Accelerate photovoltaic DC-to-AC converter shutdown by breaking the power-balance of distributed photovoltaic system, and then make distributed system
System departs from island state.Owing to passive type exists operating dead zone (when generated output, load power balance),
And active this problem of can avoiding, the most active obtained in low-voltage distribution network anti-islanding wide should
With.
And the basic configuration of existing Power Quality Detection and isolated island effect prevention is equipment for monitoring power quality, anti-
Isolated island protection device is each a set of, and above-mentioned two covering device function singlenesses, the operating condition according to distributed photovoltaic is only
Vertical work.When distributed photovoltaic is properly functioning, equipment for monitoring power quality is responsible for electrical energy parameter at PCC
Collection, monitoring；When distributed photovoltaic islet operation, anti-islanding device performs corresponding relay protective scheme,
Although basic configuration complete function, the division of labor clearly, but have the disadvantage in that
1, two covering devices gather identical electric current, voltage, but separate cabling, cause second loop return wiring multiple
Miscellaneous, it is not easy to field adjustable and regular maintenance；
2, two complete equipments take bigger installing space, for power distribution cabinet, the box type transformer of limited space,
Installation difficulty；
3, the investment cost that equipment is total is bigger.
In view of this, special proposition this utility model.
Utility model content
This utility model technical issues that need to address are: provide a kind of that Power Quality Detection function is lonely with anti-
The device that island effector function combines, solves two covering device separate cablings in prior art, causes secondary circuit
Wiring is complicated, take up room the problem big, investment cost is big.
For solving the problems referred to above, this utility model adopts the following technical scheme that
The anti-islanding device of a kind of band electric energy quality monitoring, including cabinet and bus board, described bus board is arranged
In cabinet, described bus board connects and has CPU card, exchange to gather plug-in unit, IO plug-in unit and operation circuit
Plug-in unit, described CPU card controls even with described collection plug-in unit, IO plug-in unit and the operation circuit plug-in unit of exchanging respectively
Connecing, described operation circuit plug-in unit is connected with the anti-islanding loop in photovoltaic circuit, and described exchange gathers plug-in unit
Gathering power quality parameter, described IO plug-in unit connects control device, and described control device is inserted by CPU
Operation circuit plug-in unit described in part order-driven, described operation circuit plug-in unit controls the anti-islanding in anti-islanding loop
Switch is opening/closing.
Preferably, described control device includes that relay, described relay are connected with described operation circuit plug-in unit
Connect.Relay plays a part to be automatically adjusted in circuit, safeguard protection, change-over circuit.
Preferably, described exchange gathers plug-in unit connection mutual induction of voltage sensor and Current Mutual Inductance sensor.
Preferably, described bus board connects oriented monitoring backstage and scheduling station send quality of power supply information and
Anti-islanding protection information the remote control of scheduling station and the communication plug-in unit of information inquiry, described communication plug-in unit with
CPU card is connected, and is connected with monitoring backstage and scheduling station signal by Ethernet interface and serial ports.
Preferably, described cabinet is provided with display floater, described display floater is provided with LED.
Preferably, described cabinet being provided with control button, described control button is connected with described CPU card
Connect.Control button for operations such as user carry out that parameter is arranged.
Preferably, described IO plug-in unit connects position sensor, and described position sensor gathers in photovoltaic circuit
Distribution transforming low side switch position, the anti-islanding position of the switch.
Preferably, described anti-islanding loop includes disturbing resistance, when described anti-islanding switch is in opening,
Described interference resistance and described anti-islanding loop are in access state, and described anti-islanding switch is closed
Time, described interference resistance is off with described anti-islanding loop.
Preferably, described interference resistance is trimmable resistance.
Preferably, also include that remote control unit, described remote control unit are connected with described CPU card signal.Remote control
User-friendly device of device.
After using technique scheme, this utility model compared with prior art has the advantages that
This utility model is integrated with electric energy quality monitoring, anti-islanding protection function, meets distributed photovoltaic and exists
Functional requirement under properly functioning, island state, simplifies secondary connection, saves installing space, solves
Two covering device separate cablings in prior art, cause that second loop return wiring is complicated, it is big to take up room, investment
Expensive problem.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the anti-islanding device of this utility model embodiment band electric energy quality monitoring；
Fig. 2 is the logical flow chart that this utility model embodiment carries out Power Quality Detection；
Fig. 3 is the schematic diagram of this utility model embodiment anti-islanding circuit；
Fig. 4 is the logical flow chart that this utility model embodiment carries out sending out isolated island action.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearer, new below in conjunction with this practicality
Accompanying drawing in type embodiment, carries out clear, complete description to the technical scheme in embodiment, below implements
Example is used for illustrating this utility model, but is not limited to scope of the present utility model.
The anti-islanding device of band electric energy quality monitoring as shown in Figure 1, including cabinet and bus board, bus board
It is arranged in cabinet, bus board connects and has CPU card, exchange to gather plug-in unit, IO plug-in unit and operation circuit
Plug-in unit, CPU card gathers plug-in unit, IO plug-in unit and operation circuit plug-in unit respectively and controls to be connected with exchange.Operation
Loop plug-in unit is connected with the anti-islanding loop in photovoltaic circuit, and exchange gathers plug-in unit and gathers power quality parameter,
Exchange gathers plug-in unit connection mutual induction of voltage sensor and Current Mutual Inductance sensor.IO plug-in unit connects controller
Part and position sensor, position sensor gathers the distribution transforming low side switch position in photovoltaic circuit, anti-islanding is opened
Off position；Control device and control anti-by CPU card order-driven operation circuit plug-in unit, operation circuit plug-in unit
It is opening/closing that anti-islanding in isolated island loop switchs.In the present embodiment, control device and include relay, relay
It is connected with operation circuit plug-in unit.Relay play in circuit be automatically adjusted, safeguard protection, change-over circuit
Effect.
Favourable, bus board connects oriented monitoring backstage and scheduling station sends quality of power supply information and anti-orphan
Information the remote control of scheduling station and the communication plug-in unit of information inquiry, communication plug-in unit and CPU card are protected in island
It is connected, and is connected with monitoring backstage and scheduling station signal by Ethernet interface and serial ports.
In the present embodiment, cabinet is provided with display floater and controls button, display floater is provided with LED
Lamp.Control button to be connected with CPU card.Control button for operations such as user carry out that parameter is arranged.
IO plug-in unit connects has anti-islanding loop to include disturbing resistance, when anti-islanding switch is in opening, dry
Disturb resistance and anti-islanding loop and be in access state, when anti-islanding switch is closed, interference resistance with
Anti-islanding loop is off.Favourable, this interference resistance is trimmable resistance.
In the present embodiment, also include that remote control unit, remote control unit are connected with CPU card signal.Remote control fills
Put user-friendly device.
Below in conjunction with effect, the relation function to the anti-islanding device of band electric energy quality monitoring between above-mentioned parts
It is further detailed.
Electric energy quality monitoring function: CPU card module processes, by bus, the signal that AC sampling plug-in unit is sent here,
Be calculated quality of power supply information at PCC (voltage, electric current, frequency, reactive power, reactive power,
Power factor, harmonic content, degree of unbalancedness etc.), when harmonic content exceed standard, frequency anomaly, degree of unbalancedness more
In limited time, device display floater produces warning information, and is uploaded to information monitor backstage, scheduling station.As
Shown in Fig. 2, in order to ensure power quality parameter accurately and reliably, only it is in non-isolated island at distributed photovoltaic
When operation, minimum bus voltage are more than or equal to the system nominal voltage of 80%, just start electric energy quality monitoring；
When the conditions set forth above are not met, quality of power supply supervision is no longer carried out.
Anti-islanding protection function: as shown in figs. 1 and 3, CPU card by bus process AC sampling plug-in unit,
The signal sent on IO plug-in unit, when judging that distributed photovoltaic is in islet operation, drives the relay in IO plug-in unit
Device, this relay tip can be accessed by the closing circuit in operation circuit plug-in unit, starts anti-islanding switch and closes a floodgate.
After anti-islanding switch closes a floodgate successfully, external disturbance resistance puts into operation, breaks the power-balance at PCC,
Accelerate inverter anti-isolated island protection act and shut down, thus release island state.As shown in Figure 4, this device
Possess manual, automatic, three kinds of control modes of remote control, under any one control mode above-mentioned, if distribution transforming is low
Switch point position, side, bus maximum line voltage exceed anti-islanding voltage definite value of adjusting, then through time delay definite value of adjusting,
Anti-islanding protection action.
Telemechanical communication function: as it is shown in figure 1, CPU card carries out information alternately by bus and communication plug-in unit,
Quality of power supply information, anti-islanding protection information are sent to monitoring backstage, scheduling by Ethernet interface, serial ports
Main website, and accept to monitor the operations such as backstage, the remote control of scheduling station, information inquiry.CPU card is built-in rich
Rich communications protocol storehouse, support IEC60870-5-101 stipulations, IEC60870-5-103 stipulations,
IEC60870-5-104 communication protocol, MODBUS stipulations etc., can realize and all kinds of monitoring systems, scheduling master
The communication stood.
It should be noted that above example can be further combined and replace, and embodiment is only to this reality
It is described with novel preferred embodiment, not spirit and scope of the present utility model is defined,
On the premise of this utility model design philosophy, those skilled in the art are to technical side of the present utility model
The changes and improvements that case is made, belong to protection domain of the present utility model.
Claims (10)
1. the anti-islanding device of a band electric energy quality monitoring, it is characterised in that include cabinet and bus board,
Described bus board is arranged in cabinet, described bus board connects and has CPU card, exchange to gather plug-in unit, IO
Plug-in unit and operation circuit plug-in unit, described CPU card exchanges collection plug-in unit, IO plug-in unit and operation with described respectively
Loop plug-in unit controls to connect, and described operation circuit plug-in unit is connected with the anti-islanding loop in photovoltaic circuit, institute
Stating exchange and gather plug-in unit collection power quality parameter, described IO plug-in unit connects control device, described controller
Part is by operation circuit plug-in unit described in CPU card order-driven, and described operation circuit plug-in unit controls anti-islanding and returns
It is opening/closing that anti-islanding in road switchs.
The anti-islanding device of band electric energy quality monitoring the most according to claim 1, it is characterised in that institute
State control device and include that relay, described relay are connected with described operation circuit plug-in unit.
The anti-islanding device of band electric energy quality monitoring the most according to claim 1, it is characterised in that institute
State exchange collection plug-in unit connection and have mutual induction of voltage sensor and Current Mutual Inductance sensor.
The anti-islanding device of band electric energy quality monitoring the most according to claim 1, it is characterised in that institute
State and on bus board, connect oriented monitoring backstage and scheduling station transmission quality of power supply information and anti-islanding protection letter
Breath the remote control of scheduling station and the communication plug-in unit of information inquiry, described communication plug-in unit is connected with CPU card
Connect, and be connected with monitoring backstage and scheduling station signal by Ethernet interface and serial ports.
The anti-islanding device of band electric energy quality monitoring the most according to claim 1, it is characterised in that institute
State and on cabinet, be provided with display floater, described display floater is provided with LED.
The anti-islanding device of band electric energy quality monitoring the most according to claim 5, it is characterised in that institute
Stating and be provided with control button on cabinet, described control button is connected with described CPU card.
The anti-islanding device of band electric energy quality monitoring the most according to claim 1, it is characterised in that institute
Stating IO plug-in unit and connect position sensor, described position sensor gathers the distribution transforming low side switch in photovoltaic circuit
Position, the anti-islanding position of the switch.
The anti-islanding device of band electric energy quality monitoring the most according to claim 1, it is characterised in that institute
State anti-islanding loop and include disturbing resistance, when described anti-islanding switch is in opening, described interference resistance
It is in access state with described anti-islanding loop, when described anti-islanding switch is closed, described interference
Resistance is off with described anti-islanding loop.
The anti-islanding device of band electric energy quality monitoring the most according to claim 8, it is characterised in that institute
Stating interference resistance is trimmable resistance.
The anti-islanding device of band electric energy quality monitoring the most according to claim 1, it is characterised in that
Also include that remote control unit, described remote control unit are connected with described CPU card signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620336846.7U CN205544333U (en) | 2016-04-20 | 2016-04-20 | Electrified ability quality monitoring's anti - isolated island device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620336846.7U CN205544333U (en) | 2016-04-20 | 2016-04-20 | Electrified ability quality monitoring's anti - isolated island device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205544333U true CN205544333U (en) | 2016-08-31 |
Family
ID=56796772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620336846.7U Active CN205544333U (en) | 2016-04-20 | 2016-04-20 | Electrified ability quality monitoring's anti - isolated island device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205544333U (en) |
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2016
- 2016-04-20 CN CN201620336846.7U patent/CN205544333U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Chen Jing Inventor after: Rao Jianbo Inventor after: Chen Xu Inventor after: Li Jin Inventor after: Wang Xuehu Inventor after: Gao Fuchun Inventor after: Zhang Jinkui Inventor after: Hu Lice Inventor after: Fang Shouxian Inventor before: Rao Jianbo Inventor before: Chen Xu Inventor before: Li Jin Inventor before: Wang Xuehu Inventor before: Gao Fuchun Inventor before: Zhang Jinkui Inventor before: Hu Lice Inventor before: Fang Shouxian |
|
| CB03 | Change of inventor or designer information |