CN102332729A - Inverter parallel system based on zigbee technology - Google Patents
Inverter parallel system based on zigbee technology Download PDFInfo
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- CN102332729A CN102332729A CN201110320041A CN201110320041A CN102332729A CN 102332729 A CN102332729 A CN 102332729A CN 201110320041 A CN201110320041 A CN 201110320041A CN 201110320041 A CN201110320041 A CN 201110320041A CN 102332729 A CN102332729 A CN 102332729A
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Abstract
The invention discloses an inverter parallel system based on a zigbee technology. The inverter parallel system comprises an alternating current bus, a bus controller which is connected to the alternating current bus, and a group of inverter modules which are connected to the alternating current bus in parallel, wherein the bus controller comprises a bus controller zigbee radio frequency chip CC2430, a bus controller detection circuit and a bus controller wireless transmitting and receiving circuit; the inverter modules respectively comprise an inverter which is connected to the alternating current bus, and an inverter controller; and the inverter controller comprises an inverter controller zigbee radio frequency chip CC2430, a digital signal processing (DSP) chip, a memory, a peripheral input unit, an output display unit and an inverter controller wireless transmitting and receiving circuit. By adoption of the inverter parallel system provided by the invention, a fault can be self-diagnosed; a fault inverter module is quickly positioned; the fault inverter module is cut off from the parallel system; a load current is uniformly allocated to each inverter; and hot-plug can be realized.
Description
Technical field
The present invention relates to a kind of inverter parallel technology, relate in particular to a kind of inverter parallel system based on the zigbee technology.
Background technology
Along with the development and the demand of society, a lot of load equipments require increasingly to the inverter power capacity, and the extendibility of single module inverter and reliability have received very big restriction, so design the parallel connection of multimode inverter and generate electricity by way of merging two or more grid systems and seem particularly important.A plurality of inverter parallels are the effective way of the capacity of expansion inverter, and the inverter parallel connection mainly contains following advantage: (1) can enlarge the capacity of inverter system flexibly; (2) can form parallel redundant system, improve reliability of system operation, and when fault, can change very easily or keep in repair.But the inverter parallel connection also has many technical barriers to need to be resolved hurrily, and produces the meeting phase difference during such as a plurality of inverter parallel, with regard to considering synchronous problem, especially how to avoid the generation of circulation to have become an important topic.
Several kinds of control methods commonly used at present have centralized control, principal and subordinate's control, 3C control, distributed logic control and do not have interconnection line Parallel Control mode; But all there was certain defective in control mode during these were several: centralized control is owing to exist more holding wire; Make to be subject to each other disturb, thereby reliability is not high; Principal and subordinate's control mode can not realize the equity of principal and subordinate's module fully; The enhancing that influences each other in the 3C control mode between the module, the control difficulty of parallelly connected scheme is bigger; Owing to the existence of interconnection line, system is vulnerable to certain interference in the distributed logic control mode; Up to the present be not merely theoretical research and there is interconnection line Parallel Control mode, actual not having successfully used case.
Summary of the invention
Goal of the invention: in order to overcome the deficiency that exists in the prior art; The present invention provides a kind of inverter parallel system based on the zigbee technology that can realize that each inverter load current of parallel connection is divided equally; It can realize the self diagnosis of fault; The fault location inverter module excises it from parallel system fast, and gives other modules with the load current uniform distribution; And can realize hot plug.
Technical scheme: for solving the problems of the technologies described above, the technical scheme that the present invention adopts is:
A kind of inverter parallel system based on zigbee technology, the bus controller that comprises ac bus, is connected on the ac bus and the voltage on the ac bus, frequency and phase signal are gathered and be connected in parallel on one group of inverter module on the ac bus; Said bus controller comprises bus controller zigbee radio frequency chip CC2430, is connected bus controller testing circuit and bus controller wireless transceiver circuit on the bus controller zigbee radio frequency chip CC2430, and bus controller is connected with ac bus through the bus controller testing circuit; Said inverter module comprises the circuit control device that is connected the inverter on the ac bus and is connected on the inverter and the voltage on the inverter, frequency and phase signal are gathered; Said circuit control device comprises circuit control device zigbee radio frequency chip CC2430, is connected dsp chip (the Digital Signal Processing on the circuit control device zigbee radio frequency chip CC2430; Digital signal processor), the circuit control device wireless transceiver circuit that is used to store the memory that correction factor is set, peripheral input unit, output display unit and communicates with the bus controller wireless transceiver circuit, said inverter is connected with circuit control device through dsp chip.
Bus controller at first detects the energy information of ac bus through the bus controller testing circuit; Through bus controller zigbee radio frequency chip CC2430 the energy information of gathering is handled then and produced control information (such as synchronizing signal and equal flow valuve), through the bus controller wireless transceiver circuit control information is sent to inverter module at last.Output display unit and peripheral input unit (such as press key input device) are as the man-machine communication window in the inverter module; Can realize peripheral control; Information such as correction factor can be input among the circuit control device zigbee radio frequency chip CC2430 through peripheral input unit; And sending dsp chip to, the energy information of the detected inverter of dsp chip can be sent among the circuit control device zigbee radio frequency chip CC2430, shows through display unit; In addition; The circuit control device wireless transceiver circuit receives the synchronizing signal and equal flow valuve that the bus controller wireless transceiver circuit sends; And send dsp chip to, realize output current control by dsp chip, and then accomplish inverter parallel system sharing control task; For the synchronizing signal that receives, inverter module can adopt phase-locked loop to guarantee that output voltage and synchronizing signal are consistent.
Said bus controller zigbee radio frequency chip CC2430 is provided with the inverter module number statistical unit and the electric current mean value computation unit of normal operation; Bus controller zigbee radio frequency chip CC2430 is as the radio communication main frame; Number to the inverter module of normal operation on the ac bus is added up; In conjunction with each phase current of detected bus; Carry out current-sharing and calculate (with the number of the total load current of ac bus divided by the inverter module of normal operation, the equal flow valuve that obtains is as the reference current signal of each inverter), and adopt communication that current-sharing result of calculation is sent to each inverter module; Circuit control device detects the output current of affiliated module and calculates current error simultaneously, realizes sharing control.Circuit control device is compared the control information that the energy information that collects and bus controller send,, can't be adjusted to reference value, explain that then this inverter module breaks down, need to break off itself and being connected of bus if deviation is bigger.
Said circuit control device zigbee radio frequency chip CC2430 is provided with the UART communication interface, and said dsp chip is connected with circuit control device zigbee radio frequency chip CC2430 through the UART communication interface.
Said bus controller zigbee radio frequency chip CC2430 carries 8 passages, 8 ~ 14 bit A/D converters; Said bus controller testing circuit is connected with bus controller zigbee radio frequency chip CC2430 through the ADC pin of this AD converter, and the analog-to-digital conversion of each phase electric power signal need not to add the A/D chip.
Beneficial effect: a kind of inverter parallel system provided by the invention based on the zigbee technology; Carry out the synchronizing signal transmission and the transmission of current-sharing current signal of inverter parallel system with zigbee radio frequency chip CC2430; Holding wire is more when having avoided the employing wired connection, is prone to produce shortcomings such as interference; In circuit control device, adopt zigbee radio frequency chip CC2430 to substitute single-chip microcomputer, both can realize original function, can carry out radio communication again as interpersonal mutual main control chip; Replace the communication mode of CAN bus etc. and main frame, and need not external radio communication circuit, neither increased cost, can improve the stability of a system again.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the bus controller structural representation;
Fig. 3 is the circuit control device structural representation;
Fig. 4 is the control principle figure of circuit control device.
Embodiment
Below in conjunction with accompanying drawing the present invention is done explanation further.
Be illustrated in figure 1 as a kind of inverter parallel system, the bus controller that comprises ac bus, is connected on the ac bus and the voltage on the ac bus, frequency and phase signal are gathered and be connected in parallel on n inverter module on the ac bus based on zigbee technology.
As shown in Figure 2; Bus controller comprises bus controller zigbee radio frequency chip CC2430, is connected bus controller testing circuit and bus controller wireless transceiver circuit on the bus controller zigbee radio frequency chip CC2430, and bus controller is connected with ac bus through the bus controller testing circuit; On bus controller zigbee radio frequency chip CC2430, be provided with the inverter module number statistical unit and the electric current mean value computation unit of normal operation, the inverter module number statistical unit of said normal operation can be cooperated the circuit of bus controller zigbee radio frequency chip CC2430 to be connected realization by the software program that the technical staff writes with electric current mean value computation unit; Said bus controller testing circuit comprises busbar voltage testing circuit, bus current testing circuit, bus frequency detection circuit and bus phase detecting circuit.Bus controller detects electric power signal such as ac bus voltage, frequency, phase place, and sends synchronous control signal to each circuit control device through the bus controller wireless transceiver circuit.Bus controller detects total load current; And detect the inverter number be connected in parallel on operate as normal on the ac bus through the bus controller wireless transceiver circuit; With the shunt chopper platform number of total load current divided by operate as normal; Obtain the average current size that every inverter should be exported, send synchronous control signal to each circuit control device through the bus controller wireless transceiver circuit then.
Said inverter module comprises the circuit control device that is connected the inverter on the ac bus and is connected on the inverter and the voltage on the inverter, frequency and phase signal are gathered; Said circuit control device as shown in Figure 3 comprises circuit control device zigbee radio frequency chip CC2430, be connected the dsp chip on the UART communication interface of circuit control device zigbee radio frequency chip CC2430, the circuit control device wireless transceiver circuit that is used to store the memory that correction factor is set, peripheral input unit, output display unit and communicates with the bus controller wireless transceiver circuit, and said inverter is connected with circuit control device through dsp chip.Main control chip DSP carries out SPWM control according to given signal to inverter, and detects inverter output signal and whether meet the setting signal requirement, and inverter is regulated.Memory is used to deposit the correction value of the invertor operation parameter of setting; And when each start, read the wherein correction value of storage through circuit control device zigbee radio frequency chip CC2430; Correction factor through the storage of UART interface and dsp chip relatively confirms whether the two is identical, if identical then normally operation; If which different definite selections be as the criterion with, thereby guarantee the fail safe of start.Peripheral input unit is used to export the correction factor of setting, and inverter is operated.The output display unit is used to show the setting of inverter correction factor and the operational factor of inverter.Whether normally circuit control device zigbee radio frequency chip CC2430 sends inverter operation information through the circuit control device wireless transceiver circuit to bus controller; And receive synchronizing signal and the average current value that bus controller sends, as the given signal of inverter.When inverter breaks down; Dsp chip sends to circuit control device zigbee radio frequency chip CC2430 with signal; Circuit control device zigbee radio frequency chip CC2430 sends instruction and breaks off being connected of this TV station inverter and bus controller; And pass through the circuit control device wireless transceiver circuit and send fault-signal to bus controller, when bus controller receives the fault-signal of this machine, normal inverter platform number is subtracted 1; And then recomputate the average current size, send to each circuit control device.
Fig. 4 is the control block diagram of inverter, and inverter adopts voltage, current double closed-loop control, and outer shroud adopts voltage PI control, and interior ring adopts the control of current hysteresis ring.U wherein
RefBe the voltage given signal, be unit operation, directly given signal is provided,, provide by bus controller if be parallel running by dsp chip.U
0ofBe the inverter output voltage feedback signal, the two difference is the output current reference quantity after pi regulator is handled, and wherein UKP is the voltage ratio regulon, and UKI is the voltage integrating meter regulon.I in the current inner loop
0ofBe inverter output current value of feedback, I
AveThe current average that provides for bus controller.The difference of current feedback signal and current average is after Gi (s) amplifies, and through the ring controller processing controls inverter that stagnates, the ac electric of inverter output needs again AC energy to be delivered to ac bus through low pass filter LPF filtering high order harmonic component again.This control system has the static accuracy height, rapid dynamic response speed, and output harmonic wave is little, can not produce characteristics such as influence each other between the inverter.
The above only is a preferred implementation of the present invention; Be noted that for those skilled in the art; Under the prerequisite that does not break away from the principle of the invention, can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (4)
1. inverter parallel system based on zigbee technology is characterized in that: the bus controller that this parallel system comprises ac bus, be connected on the ac bus and the voltage on the ac bus, frequency and phase signal are gathered and be connected in parallel on one group of inverter module on the ac bus; Said bus controller comprises bus controller zigbee radio frequency chip CC2430, is connected bus controller testing circuit and bus controller wireless transceiver circuit on the bus controller zigbee radio frequency chip CC2430, and bus controller is connected with ac bus through the bus controller testing circuit; Said inverter module comprises the circuit control device that is connected the inverter on the ac bus and is connected on the inverter and the voltage on the inverter, frequency and phase signal are detected, control; Said circuit control device comprises circuit control device zigbee radio frequency chip CC2430, is connected the dsp chip on the circuit control device zigbee radio frequency chip CC2430, the circuit control device wireless transceiver circuit that is used to store the memory that correction factor is set, peripheral input unit, output display unit and communicates with the bus controller wireless transceiver circuit, and said inverter is connected with circuit control device through dsp chip.
2. a kind of inverter parallel system based on the zigbee technology according to claim 1, it is characterized in that: said bus controller zigbee radio frequency chip CC2430 is provided with the inverter module number statistical unit and the electric current mean value computation unit of normal operation.
3. a kind of inverter parallel system according to claim 1 based on the zigbee technology; It is characterized in that: said circuit control device zigbee radio frequency chip CC2430 is provided with the UART communication interface, and said dsp chip is connected with circuit control device zigbee radio frequency chip CC2430 through the UART communication interface.
4. a kind of inverter parallel system according to claim 1 based on the zigbee technology; It is characterized in that: said bus controller zigbee radio frequency chip CC2430 is provided with the ADC pin, and said bus controller testing circuit is connected with bus controller zigbee radio frequency chip CC2430 through the ADC pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110320041.5A CN102332729B (en) | 2011-10-20 | A kind of inverter parallel system based on Zigbee-technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110320041.5A CN102332729B (en) | 2011-10-20 | A kind of inverter parallel system based on Zigbee-technology |
Publications (2)
| Publication Number | Publication Date |
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| CN102332729A true CN102332729A (en) | 2012-01-25 |
| CN102332729B CN102332729B (en) | 2016-12-14 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2014008675A1 (en) * | 2012-07-09 | 2014-01-16 | 纽福克斯光电科技（上海）有限公司 | Wireless transceiver module and inversion system thereof |
| CN103713563A (en) * | 2014-01-21 | 2014-04-09 | 青岛经济技术开发区创统科技发展有限公司 | Megawatt converter parallel control method and system |
| CN104660085A (en) * | 2013-11-18 | 2015-05-27 | 华东理工大学 | Wireless synchronous output parallel inverter, inverter set and operating method |
| CN106227032A (en) * | 2015-06-02 | 2016-12-14 | Ls 产电株式会社 | The method controlling inverter |
| CN107797047A (en) * | 2017-09-27 | 2018-03-13 | 深圳和而泰智能控制股份有限公司 | Load state detecting method, device and electronic equipment |
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| CN2591840Y (en) * | 2001-12-07 | 2003-12-10 | 广东志成冠军电子实业有限公司 | Bus controlled parallel uninterruption power source |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014008675A1 (en) * | 2012-07-09 | 2014-01-16 | 纽福克斯光电科技（上海）有限公司 | Wireless transceiver module and inversion system thereof |
| CN104660085A (en) * | 2013-11-18 | 2015-05-27 | 华东理工大学 | Wireless synchronous output parallel inverter, inverter set and operating method |
| CN103713563A (en) * | 2014-01-21 | 2014-04-09 | 青岛经济技术开发区创统科技发展有限公司 | Megawatt converter parallel control method and system |
| CN103713563B (en) * | 2014-01-21 | 2016-04-06 | 青岛经济技术开发区创统科技发展有限公司 | A kind of megawatt converter parallel control method and system |
| CN106227032A (en) * | 2015-06-02 | 2016-12-14 | Ls 产电株式会社 | The method controlling inverter |
| CN106227032B (en) * | 2015-06-02 | 2019-06-14 | Ls 产电株式会社 | The method for controlling inverter |
| US10659536B2 (en) | 2015-06-02 | 2020-05-19 | Lsis Co., Ltd. | Method of controlling inverters |
| CN107797047A (en) * | 2017-09-27 | 2018-03-13 | 深圳和而泰智能控制股份有限公司 | Load state detecting method, device and electronic equipment |
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Address after: 226000 Jiangsu Province, Nantong City Chongchuan District Youth Road No. 105 Applicant after: JIANGSU College OF ENGINEERING AND TECHNOLOGY Address before: 226000 Jiangsu Province, Nantong City Chongchuan District Youth Road No. 105 Applicant before: nantong textile vocational technology college |
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Granted publication date: 20161214 Termination date: 20211020 |