CN203537070U - Distributed power supply grid connection interface device - Google Patents
Distributed power supply grid connection interface device Download PDFInfo
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- CN203537070U CN203537070U CN201320625139.6U CN201320625139U CN203537070U CN 203537070 U CN203537070 U CN 203537070U CN 201320625139 U CN201320625139 U CN 201320625139U CN 203537070 U CN203537070 U CN 203537070U
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- 238000005070 sampling Methods 0.000 claims abstract description 19
- 238000004891 communication Methods 0.000 claims abstract description 17
- 230000001012 protector Effects 0.000 claims description 15
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001681 protective Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a distributed power supply grid connection interface device which comprises a shell. A field control panel and a display panel are disposed on the shell. A bus plate is disposed in the shell. A power supply plug-in provided with working voltage is disposed on the bus plate. A CPU plug-in, an alternating current sampling plug-in, a smart I/O plug-in, a remote communication plug-in and a serial communication plug-in are also disposed on the bus plate. The CPU plug-in is in signal connection with the alternating current sampling plug-in, the smart I/O plug-in, the remote communication plug-in and the serial communication plug-in respectively. According to the utility model, circuit signals of secondary equipment in grid connection circuits can be processed in a centralized manner, grid connection circuit wiring can be optimized, secondary equipment intensification is facilitated, detection and maintenance by a user are facilitated, and popularization is facilitated.
Description
Technical field
The utility model relates to distributed power source interconnection technology, the grid-connected interface arrangement of especially a kind of distributed power source.
Background technology
Distributed power generation, typically refer to generated output at several kilowatts to small modular, the distributings of hundreds of megawatts, be arranged near generator unit user, high efficient and reliable, its core is various types of distributed power sources, the power supply of the renewable energy power generations such as the wind energy mainly referring to, solar energy, water energy, natural gas, geothermal energy, oceanic energy, biomass energy.After a large amount of distributed power source access electrical networks, electrical network is affected, therefore need to and the voltage of site, electric current, meritorious, idle, power factors etc. are monitored, and local power scheduling department will be sent in associated electrical tolerance data, power scheduling department moves by telecontrol system straighforward operation electrical network circuit, therefore, in existing parallel network circuit, need numerous secondary devices (as protective relaying device, measure and control device, Communications Management Units, telemechanical apparatus, equipment for monitoring power quality), owing to not having special interface equipment to focus on, caused secondary device separate cabling separately, difficulty is installed, secondary circuit is loaded down with trivial details, and equipment investment expense is large, be unfavorable for applying of distributed photovoltaic power generation.
Utility model content
The purpose of this utility model is to provide the grid-connected interface arrangement of a kind of distributed power source, can focus on the circuit signal of secondary device in parallel network circuit, and then optimize parallel network circuit wiring, be conducive to secondary device intensive, person easy to use detects maintenance, popularization easy to use.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme: the grid-connected interface arrangement of a kind of distributed power source, comprise a housing, housing is provided with field control panel and display floater, in housing, be provided with a bus board, described bus board has connected the power insert that operating voltage is provided, and has also connected CPU card on described bus board, integrated relay protector, observing and controlling meter, power quality monitor and protocol converter; AC sampling plug-in unit: be used for detecting power grid points of common connection voltage and current; Intelligence I/O plug-in unit: be used for to controlled switch collection and transmitted signal; Telecommunication plug-in unit: be used for communicating by letter with scheduling station telemechanical; Serial communication plug-in unit: be used for communicating by letter with inverter, header box and environment monitor in distributed power station; Described CPU card is electrically connected to AC sampling plug-in unit, intelligent I/O plug-in unit, telecommunication plug-in unit, serial communication plug-in unit respectively.In CPU card; integrated relay protector, observing and controlling meter, power quality monitor and protocol converter; the secondary device relating in parallel network circuit is all concentrated in a device and processed; can Optimization Design of Electronic Circuits; convenient detection keeped in repair; be convenient to each secondary device intensively, be arranged on popularization easy to use in same housing.
Wherein, described CPU card realizes collection, calculating, fault judgement, the communication function of data, and sends control signal.
Described power insert is connected with CPU card by bus board, and accessing high level power supply and converting low level to provides working power to each plug-in unit;
Described AC sampling plug-in unit is connected with CPU card by bus board, is used for accessing the grid-connected points of common connection voltage transformer of distributed power generation summation current transformer, converts voltage, current signal to voltage small-signal;
Described intelligent I/O plug-in unit is connected with CPU card by bus board, is used for gathering switch position signal and sending breaker tripping and closing order to controlled switch;
Described telecommunication plug-in unit is connected with CPU card by bus board, is used for and scheduling station wireless GPRS/cdma communication, realize power station internal information on send the acceptance with scheduling station control command.
Described serial communication plug-in unit is connected with CPU card by bus board, be used for distributed power station in the devices communicating such as inverter, header box, environment monitor.
As preferably, described observing and controlling meter has comprised controller and the meter that mutual signal connects.Controller calculates meritorious idle data, and data-signal is passed to meter, and the meritorious idle data that meter calculates based on controller, calculate the data such as four-quadrant electric flux and load curve.
As preferably; described AC sampling plug-in unit has been electrically connected to respectively relay protector, controller and power quality monitor; described relay protector and controller have been electrically connected to respectively intelligent I/O plug-in unit, and described controller, meter and power quality monitor have been electrically connected to respectively telecommunication plug-in unit.AC sampling plug-in unit collects after electric current and voltage amount from current transformer and voltage transformer; by internal bus, be delivered to relay protector, controller and power quality monitor; described controller, meter and power quality monitor are sent to scheduling station by the data-signal calculating separately through telecommunication plug-in unit, are convenient to the unified processing of scheduling station.
As preferably, described AC sampling plug-in unit, intelligent I/O plug-in unit, telecommunication plug-in unit have all been connected the plug receptacle connecting on housing with serial communication plug-in unit.AC sampling plug-in unit, intelligent I/O plug-in unit and telecommunication plug-in unit need to be connected with external equipment, so need to stay plug receptacle on housing.
As preferably, described field control panel and display floater are positioned at housing front, and each described plug receptacle is positioned at the back side of described housing.Housing front is the one side of operating personnel's normal running, and the back side is relative one side.
As preferably, described CPU card has also comprised protocol converter, and described protocol converter on the one hand signal has connected inverter, header box and environment monitor, has been electrically connected on the other hand telecommunication plug-in unit.In order more comprehensively to detect grid-connection device, CPU card can be gathered the current and voltage signals of inverter and header box and signal is synchronously uploaded to scheduling station by protocol converter.
Adopt after technique scheme; the utlity model has following outstanding advantages: the integrated processing of function that relay protector, observing and controlling meter, power quality monitor and protocol converter are carried out; in the mode of plug-in unit, concentrate and be connected on same bus plate; then be positioned in same housing; optimized circuit design; convenient detect maintenance, be convenient to each secondary device intensively, be arranged on popularization easy to use in same housing.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further:
Fig. 1 is the utility model system construction drawing
Fig. 2 is the utility model circuit signal connection layout;
Fig. 3 is the utility model front schematic view.
Embodiment
As Figure 1-3, the grid-connected interface arrangement of a kind of distributed power source, comprise a housing, housing is provided with field control panel 1 and display floater 2, in housing, be provided with a bus board, described bus board is provided with the power insert that operating voltage is provided, on described bus board, be also provided with CPU card, AC sampling plug-in unit, intelligence I/O plug-in unit and telecommunication plug-in unit and serial communication plug-in unit, wherein CPU card is integrated relay protector, observing and controlling meter, power quality monitor and protocol converter, described observing and controlling meter has comprised controller and the meter that signal connects, AC sampling plug-in unit is used for detecting power grid points of common connection voltage and current, intelligence I/O plug-in unit is used for to controlled switch collection and transmitted signal, described controlled switch generally adopts the tripping operation of relay and feed motion control parallel network circuit to turn on and off, telecommunication plug-in unit is used for communicating by letter with scheduling station telemechanical, described CPU card respectively with AC sampling plug-in unit, intelligence I/O plug-in unit, telecommunication plug-in unit is connected with serial communication plug-in unit and has a signal transitive relation, described serial communication plug-in unit is connected with CPU card by bus board, be used for distributed power station in inverter, header box, the devices communicatings such as environment monitor.Described intelligent I/O plug-in unit comprise DC power supply, switching value open into, output and the operation circuit of breaker signal transmission, described intelligent I/O plug-in unit transmission open into switch and output switch open into and output signal, the described signal of opening is sent in CPU card and processes through intelligent I/O plug-in unit, in CPU card, processes by intelligent I/O plug-in unit and is sent to and outputs switch and output signal.
For signal transitive relation is described, first CPU card is formed below and very the annexation of other plug-in units do and specifically introduce.
Relay protector is done protection calculation according to electric parameters such as the frequency of the position signalling of controlled switch and current parallel network circuit, voltage, electric currents, when fault occurs, sends signal to intelligent I/O plug-in unit, outlet tripping controlled switch; Controller calculates the meritorious idle data of parallel network circuit, and data-signal is passed to meter, and the meritorious idle data that meter calculates based on controller, calculate the data such as four-quadrant electric flux and load curve; The data such as the harmonic data of power quality monitor calculating and analytical voltage electric current and degree of unbalance.Described AC sampling plug-in unit has been electrically connected to respectively relay protector, controller and power quality monitor; described relay protector and controller have been electrically connected to respectively intelligent I/O plug-in unit, and described controller, meter and power quality monitor have been electrically connected to respectively telecommunication plug-in unit.
As Fig. 2; signal transitive relation is: AC sampling plug-in unit collects after electric current and voltage amount from current transformer PT and voltage transformer CT; by internal bus, be delivered to relay protector, controller and power quality monitor; described controller, meter and power quality monitor are sent to scheduling station by the data-signal calculating separately through telecommunication plug-in unit, are convenient to the unified processing of scheduling station.Above-mentioned internal bus can adopt CAN bus 4 forms, and telecommunication plug-in unit can be matched wireless GPRS/cdma communication according to actual needs.
By above-mentioned mode; the integrated processing of function that relay protector, observing and controlling meter and power quality monitor are carried out; in the mode of plug-in unit, concentrate and be connected on same bus plate; optimized circuit design; convenient detection keeped in repair; be convenient to each secondary device intensively, be arranged on popularization easy to use in same housing.
In order further to detect grid-connection device, described CPU card has also comprised protocol converter, described protocol converter on the one hand signal has connected inverter, header box and environment monitor, has been electrically connected on the other hand telecommunication plug-in unit and has sent a signal to the unified processing of scheduling station.Inverter, header box and environment monitor out signal by RS485 bus 5(or 232 buses) pick out, with Modbus stipulations, be connected to protocol converter, protocol converter is sent to scheduling station again by signal after Modbus stipulations are converted to IEC104 stipulations.
Described AC sampling plug-in unit, intelligent I/O plug-in unit have all been connected the plug receptacle connecting on housing with telecommunication plug-in unit.Shown in Fig. 1, Fig. 2 and Fig. 3, described field control panel 1 and display floater 2 are positioned at housing front, in this preferred embodiment, described display floater 2 comprises LCDs and LED lamp, each described plug receptacle is positioned at the back side of described housing, described plug receptacle includes debug port RJ45, I/O signaling interface, 232 serial ports that drive LCDs and ETH interface (Ethernet abbreviation, Chinese is translated into Ethernet interface).The side of facing when housing front should be operating personnel's concrete operations, for handled easily, field control panel 1 and display floater 2 are arranged on to housing front, field control panel 1 is mainly to have for example control mode switch button 3 of various field control buttons, certainly also have other to arrange according to actual needs, display floater 2 is mainly to show that the utility model running status convenient operation personnel check, mainly comprise that LED lamp carries out state indication.
Except above preferred embodiment, the utility model also has other execution mode, those skilled in the art can make various changes and distortion according to the utility model, only otherwise depart from spirit of the present utility model, all should belong to the defined scope of the utility model claims.
Claims (6)
1. the grid-connected interface arrangement of distributed power source, comprises a housing, and housing is provided with field control panel (1) and display floater (2), is provided with a bus board in housing, and described bus board has connected the power insert that operating voltage is provided, and it is characterized in that:
On described bus board, also connected CPU card, integrated relay protector, observing and controlling meter, power quality monitor and protocol converter;
AC sampling plug-in unit: be used for detecting power grid points of common connection voltage and current;
Intelligence I/O plug-in unit: be used for gathering switch position signal and sending breaker tripping and closing order to controlled switch;
Telecommunication plug-in unit: be used for communicating by letter with scheduling station telemechanical;
Serial communication plug-in unit: be used for communicating by letter with inverter, header box and environment monitor in distributed power station;
Described CPU card is connected with AC sampling plug-in unit, intelligent I/O plug-in unit, telecommunication plug-in unit and serial communication plug-in unit signal respectively.
2. the grid-connected interface arrangement of distributed power source according to claim 1, is characterized in that: described observing and controlling meter has comprised controller and the meter that signal connects.
3. the grid-connected interface arrangement of distributed power source according to claim 2; it is characterized in that: described AC sampling plug-in unit has been electrically connected to respectively relay protector, controller and power quality monitor; described relay protector and controller have been electrically connected to respectively intelligent I/O plug-in unit, and described controller, meter and power quality monitor have been electrically connected to respectively telecommunication plug-in unit.
4. the grid-connected interface arrangement of distributed power source according to claim 1, is characterized in that: described AC sampling plug-in unit, intelligent I/O plug-in unit, telecommunication plug-in unit have all been connected the plug receptacle connecting on housing with serial communication plug-in unit.
5. the grid-connected interface arrangement of distributed power source according to claim 4, is characterized in that: described field control panel (1) and display floater (2) are positioned at housing front, and each described plug receptacle is positioned at the back side of described housing.
6. the grid-connected interface arrangement of distributed power source according to claim 1, it is characterized in that: described CPU card has also comprised protocol converter, described protocol converter on the one hand signal has connected inverter, header box and environment monitor, has been electrically connected on the other hand telecommunication plug-in unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320625139.6U CN203537070U (en) | 2013-10-10 | 2013-10-10 | Distributed power supply grid connection interface device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320625139.6U CN203537070U (en) | 2013-10-10 | 2013-10-10 | Distributed power supply grid connection interface device |
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| Publication Number | Publication Date |
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| CN203537070U true CN203537070U (en) | 2014-04-09 |
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| CN201320625139.6U Expired - Fee Related CN203537070U (en) | 2013-10-10 | 2013-10-10 | Distributed power supply grid connection interface device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545926A (en) * | 2013-10-10 | 2014-01-29 | 国家电网公司 | Distributed power supply grid connection interface device |
| CN104113076A (en) * | 2014-06-27 | 2014-10-22 | 国家电网公司 | Distributed photovoltaic power generation grid-connected interface device |
-
2013
- 2013-10-10 CN CN201320625139.6U patent/CN203537070U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103545926A (en) * | 2013-10-10 | 2014-01-29 | 国家电网公司 | Distributed power supply grid connection interface device |
| CN103545926B (en) * | 2013-10-10 | 2016-01-20 | 国家电网公司 | A kind of distributed power source grid connection interface device |
| CN104113076A (en) * | 2014-06-27 | 2014-10-22 | 国家电网公司 | Distributed photovoltaic power generation grid-connected interface device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140409 Termination date: 20201010 |