CN202042911U - Micro grid control device - Google Patents
Micro grid control device Download PDFInfo
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- CN202042911U CN202042911U CN2011200528438U CN201120052843U CN202042911U CN 202042911 U CN202042911 U CN 202042911U CN 2011200528438 U CN2011200528438 U CN 2011200528438U CN 201120052843 U CN201120052843 U CN 201120052843U CN 202042911 U CN202042911 U CN 202042911U
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Abstract
Provided is a micro grid control device. A digital signal processor (DSP) (1) is connected with a micro control unit (MCU) (2) through a recommend standard (RS) 232 communication. The DSP is connected with an analog quantity input interface (4) through an analog/digital channel and connected with a frequency collection interface (5) through a counter after filter shaping. The DSP (1) is connected with a switching value input interface (8) and a switching value output interface (9) respectively through an input/output (I/O) leading foot. The micro grid control device integrates main control functions of the micro grid and has the remarkable advantages of being high in automation and controlling precision and integral in functions.
Description
Technical field
The utility model relates to the control device in distributed power generation field, refers in particular to a kind of microgrid control device.
Background technology
A kind of mode that microgrid is used as distributed power generation is now carried out the engineering application stage.But for the control of being incorporated into the power networks of microgrid, also lack at present have that piconet island detects, the control of microgrid mode switch, microgrid and wherein the synchronous generator simultaneous interconnecting control incorporate device, be difficult to realize microgrid concentrated, coordinates control.Simultaneously, existing synchronous device designs at the high-voltage power system, and it is not strong to be applied to this class low-voltage system practicality of microgrid.
Summary of the invention
The purpose of this utility model is just in order to overcome above-mentioned existing deficiency, and a kind of microgrid control device is proposed, it has, and electric network fault/power failure judgement, microgrid mode switch, microgrid inter-sync generator synchronously are incorporated into the power networks, microgrid simultaneous interconnecting, generator start and stop controlled function.
Function of the present utility model is achieved by the following technical solution.
Adopt the DSP+MCU structure, link to each other with MCU by the RS232 communication by DSP; DSP connects the analog quantity input interface by the A/D passage, connects the frequency collection interface by counter through filter shape; DSP connects switch value input interface, switching value output interface by the I/O pin.
The utility model DSP is connected with Ethernet interface, exterior storage by bus control unit.
The switch value input interface that the utility model links to each other with DSP has 24 way switch amount input channels, the switching value output interface has 16 way switch amount output channels.
The analog quantity input interface that the utility model and DSP are connected to has 8 road alternating voltage analog input channels, 8 road alternating current analog input channels.
The utility model MCU is connected with display unit, button, RS485 mouth.
DSP gathers switching value input signal, alternating voltage, ac current signal, by calculating voltage, phase place, the impedance at microgrid and site place, and in conjunction with the frequency quantity of frequency collection unit, comprehensively judges whether fault/power failure of external electrical network.When external electrical network fault/power failure, the instruction of grid side circuit breaker trip is sent in the output of DSP control switch amount, and control switch amount output interface sends the instruction of microgrid mode switch simultaneously.
Breaker closing for the generating pusher side, DSP is after putting the same period that detects its both sides voltage, send out reclosing command, realize the asynchronous switch-on function: by analog quantity input interface and frequency collection interface gather the same period dot system side and the synchronous voltage signal of subject side and the same period frequency, behind pid algorithm, obtain adjusting the amplitude and the frequency values of subject side voltage, send the pulse regulation order to the switching value output interface; When the synchronous voltage difference in magnitude and after the same period, difference on the frequency satisfied condition, the microgrid control device stops to send the pulse regulation order, sends the order of closing a floodgate.
For the grid side breaker closing, DSP is after putting the same period that detects its both sides voltage, send out reclosing command, realize the asynchronous switch-on function: boost by sending out, step-down, speedup, deceleration pulse to generator, make and put both sides voltage amplitude value difference and difference on the frequency the same period, sending the order of closing a floodgate then less than the limit value requirement.
DSP also can carry out separating brake, generator is started, stops control generator circuit breaker according to imposing a condition.The integrated microgrid major control of the utility model function has automaticity height, control precision advantages of higher.
Further set forth the utility model content below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is a microgrid control device interface schema;
Fig. 3 is the structural representation of the utility model practical application;
Fig. 4 is a microgrid control device analog acquisition block diagram.
Embodiment
As Fig. 1, the utility model adopts the DSP+MCU structure, is linked to each other with MCU2 by the RS232 communication by DSP1; DSP1 connects analog quantity input interface 4 by the A/D passage, connects frequency collection interface 5 by counter through filter shape 6; DSP connects switch value input interface 8, switching value output interface 9 by the I/O pin.The utility model DSP is connected with Ethernet interface 10, exterior storage 7 by bus control unit.The switch value input interface that the utility model links to each other with DSP1 has 24 way switch amount input channels, the switching value output interface has 16 way switch amount output channels.The analog quantity input interface that the utility model and DSP are connected to has 8 road alternating voltage analog input channels, 8 road alternating current analog input channels.The utility model MCU2 is connected with display unit 11, button 12, RS485 mouth 13.Wherein, pass through the RS32 swap data between DSP and MCU; Bus control unit connects exterior storage and Ethernet interface; Plan amount input interface comprises grid side voltage U a, Ub, Uc, Un, electric current I a, Ib, Ic, In, microgrid busbar voltage Us, generator voltage Ug; The frequency collection interface is gathered grid side frequency F, microgrid bus frequency Fs, generator end frequency Fg; Switch value input interface is gathered circuit breaker position signal, generator operation/halted state signal, device enable signal.The startup of the divide-shut brake of switching value Output Interface Control circuit breaker, generator speed and voltage adjustment, generator and stop, the mode switch of microgrid.MCU links to each other with LED with the LCD of display unit, and accepts the defeated information of button.
As Fig. 2, this microgrid control device is gathered grid side voltage U a, Ub, Uc, Un and electric current I a, Ib, Ic, In, by calculating voltage, phase place, the impedance at microgrid and site place, and in conjunction with the mains frequency value of frequency collection unit, variable quantity according to each characteristic value carries out compound judgement, determines whether fault/power failure of external electrical network.When electrical network had fault/power failure, the instruction of this device power generating network side breaker open operation realized the off-the-line of microgrid and big electrical network and the instruction of output microgrid mode switch; After the microgrid off-the-line, this device can judge whether generator puts into operation in conjunction with imposing a condition, and imposes a condition to allow and the generator off-duty, then installs to generator and sends " startup " instruction.
When microgrid is incorporated into the power networks, if impose a condition the automatic starter-generator of claimed apparatus, then install after generator speed and voltage reach limit value, start the audit function same period: gather microgrid busbar voltage Us and generator voltage Ug by the alternating voltage input unit, and by frequency collection interface collection microgrid busbar voltage Fs and generator voltage Fg, then by obtaining adjusting the amplitude and the frequency values of subject side voltage behind the pid algorithm, send the pulse regulation order to the switching value output interface, send out to generator boost, step-down, speedup, deceleration pulse; When the synchronous voltage difference in magnitude and after the same period, difference on the frequency satisfied condition, the microgrid control device stops to send the pulse regulation order, sends the order of closing a floodgate.
When the lonely network operation of microgrid switches to when being incorporated into the power networks, gather microgrid busbar voltage Us and line voltage U by the analog quantity input interface, and by frequency collection interface collection microgrid busbar voltage Fs and mains frequency F, then by obtaining voltage-regulation amount and frequency regulating amount behind the pid algorithm, send the pulse regulation order to the switching value output interface, send out to generator boost, step-down, speedup, deceleration pulse; When the synchronous voltage difference in magnitude and after the same period, difference on the frequency satisfied condition, the microgrid control device stops to send the pulse regulation order, sends the order of closing a floodgate.
When microgrid was incorporated into the power networks, if it is satisfied to impose a condition, this device can send the instruction that has a power failure to generator, realizes the control of generator automatic start-stop.
As Fig. 3, this microgrid control device is applied to the control of being incorporated into the power networks, the control of the generator in the microgrid of microgrid: by separating brake, the combined floodgate of control grid side circuit breaker, realize the off-the-line and the simultaneous interconnecting operation of microgrid; By separating brake, the combined floodgate of control generating side circuit breaker, realize the off-the-line and the simultaneous interconnecting operation of synchronous generator.
As Fig. 4, the analog quantity input interface is changed the voltage/current signals of electrical network, microgrid, generator end through the voltage/current instrument transformer, obtain the signal of range ability; After wave circuit carries out filtering and ratio add circuit after filtration again, send into the A/D acquisition channel of DSP.
Display unit comprises by LED and LCD and forming that important state, LCD that LED is used for display device then are the man-machine interfaces of device, adopts figure and literal to realize man-machine interaction.
Claims (5)
1. a microgrid control device is characterized in that, is linked to each other with MCU (2) by the RS232 communication by DSP (1); DSP connects analog quantity input interface (4) by the A/D passage, connects frequency collection interface (5) by counter through filter shape (6); DSP (1) connects switch value input interface (8), switching value output interface (9) respectively by the I/O pin.
2. a kind of microgrid control device according to claim 1 is characterized in that, DSP (1) is connected with Ethernet interface (10), exterior storage (7) by bus control unit (3).
3. a kind of microgrid control device according to claim 1 is characterized in that, the switch value input interface (8) that links to each other with DSP (1) has 24 way switch amount input channels, switching value output interface (9) has 16 way switch amount output channels.
4. a kind of microgrid control device according to claim 1 is characterized in that, the analog quantity input interface (4) that is connected to DSP (1) has 8 road alternating voltage analog input channels, 8 road alternating current analog input channels.
5. a kind of microgrid control device according to claim 1 is characterized in that, MCU (2) is connected with display unit (11), button (12), RS485 mouth (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200528438U CN202042911U (en) | 2011-03-02 | 2011-03-02 | Micro grid control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200528438U CN202042911U (en) | 2011-03-02 | 2011-03-02 | Micro grid control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202042911U true CN202042911U (en) | 2011-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200528438U Expired - Lifetime CN202042911U (en) | 2011-03-02 | 2011-03-02 | Micro grid control device |
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| CN (1) | CN202042911U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157961A (en) * | 2011-03-02 | 2011-08-17 | 云南电力试验研究院(集团)有限公司 | Micro-net control device |
| CN103178540A (en) * | 2011-12-26 | 2013-06-26 | 新奥科技发展有限公司 | Microgrid and ceaseless microgrid-connecting method thereof |
| WO2014086147A1 (en) * | 2012-12-05 | 2014-06-12 | 江苏省电力公司常州供电公司 | Method for detecting and controlling island of distributed energy source of safety automatic control system |
| CN106787207A (en) * | 2017-01-17 | 2017-05-31 | 深圳供电局有限公司 | Micro-grid integrated device and control method |
-
2011
- 2011-03-02 CN CN2011200528438U patent/CN202042911U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157961A (en) * | 2011-03-02 | 2011-08-17 | 云南电力试验研究院(集团)有限公司 | Micro-net control device |
| CN103178540A (en) * | 2011-12-26 | 2013-06-26 | 新奥科技发展有限公司 | Microgrid and ceaseless microgrid-connecting method thereof |
| WO2014086147A1 (en) * | 2012-12-05 | 2014-06-12 | 江苏省电力公司常州供电公司 | Method for detecting and controlling island of distributed energy source of safety automatic control system |
| CN106787207A (en) * | 2017-01-17 | 2017-05-31 | 深圳供电局有限公司 | Micro-grid integrated device and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111116 |