CN104078984A - Digital controller for alternating current power grid low-voltage intelligent dynamic reactive power compensation device - Google Patents
Digital controller for alternating current power grid low-voltage intelligent dynamic reactive power compensation device Download PDFInfo
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- CN104078984A CN104078984A CN201310106684.9A CN201310106684A CN104078984A CN 104078984 A CN104078984 A CN 104078984A CN 201310106684 A CN201310106684 A CN 201310106684A CN 104078984 A CN104078984 A CN 104078984A
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The invention relates to a digital controller for an alternating current power grid low-voltage intelligent dynamic reactive power compensation device. The digital controller comprises two DSP chips which are respectively the first DSP chip for performing communication data processing and the second DSP chip for performing reactive power compensation control, wherein the first DSP chip and the second DSP chip are connected through a double-port RAM and achieve data interaction. Compared with the prior art, the digital controller can accurately produce a drive signal of an inverter circuit according to an input current signal and accordingly achieve efficient reactive power compensation.
Description
Technical field
The present invention relates to a kind of reactive compensation system, especially relate to a kind of for low-voltage distribution system the digitial controller for AC network low-voltage intelligent dynamic reactive compensator.
Background technology
The electrical network of China mainly relies on electric pressure to distinguish, and wherein 66kV/110kV is called as high tension distribution system, and 20kV/10kV/6kV is middle voltage distribution system, and 220V/380V is low voltage distribution system.The problem extensively existing in distribution system is power supply reliability, power quality problem and efficiency of transmission problem.Efficiency of transmission wherein refers to that distribution system is delivered to user's electric energy, with the ratio of the electric energy obtaining from electric power transmission network.Transfer efficiency is relevant to many factors, and one of them major issue is exactly reactive power compensation problem.Alternating current is when by actual loading, because it can not be pure capacitive or pure perception, considerable part electric energy is not done work and be consumed, become reactive power, therefore need the reactive power in circuit to compensate, this is the task that reactive power compensation need to complete.Adopt rational method compensation that power consumption equipment is carried out to reactive power to have following effect: to electric power system provide or from system absorbing reactive power, stablize the voltage of receiving end and electrical network; Improve the stability of transmission system, improve ability to transmit electricity; Improve the meritorious fan-out capability of generator; Reduce various device heating, improve utilization rate of equipment and installations etc.
In regional power grid, it is idle that the mode of general employing classification opening-closing capacitor bank is carried out bucking-out system, improve power factor, this mode can only provide capacitive reactive power to system, and can not realize quick fine adjustment with the variation of load, in ensureing bus power factor, easily cause send to system idle, raise busbar voltage, harm power consumption equipment and the stability of a system.
Summary of the invention
Object of the present invention is exactly to provide a kind of digitial controller for AC network low-voltage intelligent dynamic reactive compensator in order to overcome the defect that above-mentioned prior art exists, this digitial controller can be according to the current signal of input, accurately produce the driving signal of inverter circuit, thereby realize efficient reactive power compensation.
Object of the present invention can be achieved through the following technical solutions:
A kind of digitial controller for AC network low-voltage intelligent dynamic reactive compensator, described digitial controller comprises two dsp chips, be respectively the first dsp chip for carrying out communication data processing and for carrying out the second dsp chip of the control of reactive power compensating, the first described dsp chip is connected by dual port RAM with the second dsp chip, realizes data interaction.
The first described dsp chip is provided with various communication interfaces, is connected with liquid crystal display screen or host computer by described communication interface.
The communication interface of the first dsp chip comprises Ethernet interface, serial clock interface, serial eeprom interface, CAN interface, RS485 interface and RS232 interface.
The second described dsp chip comprises the reactive power resolution unit connecting successively, stagnant chain rate is compared with control unit and driver element, described reactive power resolution unit is carried out idle separation to the digital signal of input digitial controller, reactive power resolution unit parses after reactive power, the reactive power of this reactive power and inverter circuit output is compared compared with control unit by stagnant chain rate, generate drive pulse signal and export driver element to, driver element drives the inverter circuit output compensating power of low-voltage intelligent dynamic reactive compensator according to drive pulse signal output pwm pulse signal.
The second described dsp chip is connected the A/D change-over circuit of low-voltage intelligent dynamic reactive compensator with parallel data line by A/D control line, described A/D control line is for controlling the A/D sampling of A/D change-over circuit, and described parallel data line is for receiving the digital signal after A/D conversion.
Two described dsp chips are TMS320F28335 chip.
Compared with prior art; the present invention adopts two DSP structures; one of them DSP is responsible for the processing of communication data specially; carry out data communication with liquid crystal display screen and host computer; realize data analysis and storage management, improve the operation effect of whole reactive power compensator, another DSP is responsible for logic control, defencive function, input and output processing specially, control algolithm processes and pwm pulse generates; the division of labor is clear and definite, and treatment effeciency is high.Can realize the separation of electric current composition by DSP, therefrom isolate idle composition and offset current and compare, thereby output drive signal is rapidly and accurately controlled inversion module and regulate the output of offset current, reaches best reactive power compensation effect.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is main program flow chart corresponding to the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
As shown in Figure 1, a kind of digitial controller for AC network low-voltage intelligent dynamic reactive compensator, digitial controller comprises two dsp chips, be respectively the first dsp chip 1 for carrying out communication data processing and for carrying out the second dsp chip 2 of the control of reactive power compensating, the first dsp chip 1 is connected by dual port RAM 3 with the second dsp chip 2, realizes data interaction.The first dsp chip 1 is responsible for the processing of communication data specially; carry out data communication with liquid crystal display screen and host computer; realize data analysis and storage management; improve the operation effect of whole reactive power compensator; the second dsp chip 2 is responsible for logic control, defencive function, input and output processing specially, control algolithm processes and pwm pulse generates; two dsp chip division of labor are clear and definite, and treatment effeciency is high.
The first described dsp chip is provided with various communication interfaces, comprise Ethernet interface, serial clock interface, serial eeprom interface, CAN interface, RS485 interface and RS232 interface etc., be connected with liquid crystal display screen or host computer by these communication interfaces, ensure the convenient and swift of transfer of data.
When low-voltage intelligent dynamic reactive compensator carries out reactive-current compensation, gather the current signal of load-side on electrical network by current transformer, being undertaken just inputting the 2nd DSP after A/D conversion by A/D change-over circuit processes, therefore the second dsp chip need to be connected by A/D control line the A/D change-over circuit of low-voltage intelligent dynamic reactive compensator with parallel data line, described A/D control line is for controlling the A/D sampling of A/D change-over circuit, and described parallel data line is for receiving the digital signal after A/D conversion.
The second dsp chip 1 can be divided into following unit: reactive power resolution unit, stagnant chain rate are compared with control unit and driver element, and these unit connect successively.Wherein, reactive power resolution unit is carried out idle separation to the digital signal of input digitial controller, reactive power resolution unit parses after reactive power, the reactive power of this reactive power and inverter circuit output is compared compared with control unit by stagnant chain rate, generate drive pulse signal and export driver element to, driver element drives the inverter circuit output compensating power of low-voltage intelligent dynamic reactive compensator according to drive pulse signal output pwm pulse signal.
In whole control flow, to the direct voltage in low-voltage intelligent dynamic reactive compensator and send offset current and form two closed-loop controls, thereby can stablize and dynamically realize reactive power compensation, its control method adopting is Direct Current Control, and the response speed of Direct Current Control mode and control precision are all higher.Described Direct Current Control, adopts following-up type PWM control technology to carry out FEEDBACK CONTROL to the instantaneous value of current waveform exactly.Following-up type PWM control technology is wherein specially SPWM, adopts triangular wave to compare, and obtains the action moment of inverter circuit switch.
Two dsp chips in the present invention are all selected MS320F28335 chip, and dominant frequency 150MHZ has very strong real-time control ability and ePWM module, particularly aspect the processing of floating number, have sizable superiority.The main program flow that it is corresponding, as shown in Figure 2, can realize the separation of electric current composition by DSP, therefrom isolating idle composition and offset current compares, thereby output drive signal rapidly and accurately, controls the output of inversion module adjusting offset current, reaches best reactive power compensation effect.
Claims (6)
1. the digitial controller for AC network low-voltage intelligent dynamic reactive compensator, it is characterized in that, described digitial controller comprises two dsp chips, be respectively the first dsp chip for carrying out communication data processing and for carrying out the second dsp chip of the control of reactive power compensating, the first described dsp chip is connected by dual port RAM with the second dsp chip, realizes data interaction.
2. a kind of digitial controller for AC network low-voltage intelligent dynamic reactive compensator according to claim 1, it is characterized in that, the first described dsp chip is provided with various communication interfaces, is connected with liquid crystal display screen or host computer by described communication interface.
3. a kind of digitial controller for AC network low-voltage intelligent dynamic reactive compensator according to claim 2, it is characterized in that, the communication interface of the first dsp chip comprises Ethernet interface, serial clock interface, serial eeprom interface, CAN interface, RS485 interface and RS232 interface.
4. a kind of digitial controller for AC network low-voltage intelligent dynamic reactive compensator according to claim 1, it is characterized in that, the second described dsp chip comprises the reactive power resolution unit connecting successively, stagnant chain rate is compared with control unit and driver element, described reactive power resolution unit is carried out idle separation to the digital signal of input digitial controller, reactive power resolution unit parses after reactive power, the reactive power of this reactive power and inverter circuit output is compared compared with control unit by stagnant chain rate, generate drive pulse signal and export driver element to, driver element drives the inverter circuit output compensating power of low-voltage intelligent dynamic reactive compensator according to drive pulse signal output pwm pulse signal.
5. a kind of digitial controller for AC network low-voltage intelligent dynamic reactive compensator according to claim 4, it is characterized in that, the second described dsp chip is connected the A/D change-over circuit of low-voltage intelligent dynamic reactive compensator with parallel data line by A/D control line, described A/D control line is for controlling the A/D sampling of A/D change-over circuit, and described parallel data line is for receiving the digital signal after A/D conversion.
6. a kind of digitial controller for AC network low-voltage intelligent dynamic reactive compensator according to claim 1, is characterized in that, two described dsp chips are TMS320F28335 chip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310106684.9A CN104078984A (en) | 2013-03-28 | 2013-03-28 | Digital controller for alternating current power grid low-voltage intelligent dynamic reactive power compensation device |
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| CN201310106684.9A CN104078984A (en) | 2013-03-28 | 2013-03-28 | Digital controller for alternating current power grid low-voltage intelligent dynamic reactive power compensation device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103972983A (en) * | 2014-06-13 | 2014-08-06 | 江苏方程电力科技有公司 | Inverter control system applied to microgrid and communication method of inverter control system applied to microgrid |
| CN109728936A (en) * | 2018-12-05 | 2019-05-07 | 北京电力自动化设备有限公司 | High-voltage chain type static reacance generator communication management method, apparatus and system |
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| CN101950970A (en) * | 2010-09-03 | 2011-01-19 | 天津理工大学 | Dynamic phase-splitting reactive compensation control system based on DSP |
| CN102437576A (en) * | 2011-12-20 | 2012-05-02 | 安徽鑫龙电器股份有限公司 | Active power filter (APF) controller and control method thereof |
| CN203261034U (en) * | 2013-03-28 | 2013-10-30 | 江苏方程电力科技有限公司 | Digital controller for low-voltage intelligent dynamic reactive power compensation device in alternating current power grid |
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2013
- 2013-03-28 CN CN201310106684.9A patent/CN104078984A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101931240A (en) * | 2010-08-26 | 2010-12-29 | 哈尔滨九洲电气股份有限公司 | Double-PWM vector control double-fed wind power converter |
| CN101950970A (en) * | 2010-09-03 | 2011-01-19 | 天津理工大学 | Dynamic phase-splitting reactive compensation control system based on DSP |
| CN102437576A (en) * | 2011-12-20 | 2012-05-02 | 安徽鑫龙电器股份有限公司 | Active power filter (APF) controller and control method thereof |
| CN203261034U (en) * | 2013-03-28 | 2013-10-30 | 江苏方程电力科技有限公司 | Digital controller for low-voltage intelligent dynamic reactive power compensation device in alternating current power grid |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103972983A (en) * | 2014-06-13 | 2014-08-06 | 江苏方程电力科技有公司 | Inverter control system applied to microgrid and communication method of inverter control system applied to microgrid |
| CN109728936A (en) * | 2018-12-05 | 2019-05-07 | 北京电力自动化设备有限公司 | High-voltage chain type static reacance generator communication management method, apparatus and system |
| CN109728936B (en) * | 2018-12-05 | 2021-10-29 | 北京电力自动化设备有限公司 | Communication management method, device and system for high-voltage chain type static var generator |
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