CN108092275B - DSP control system - Google Patents

DSP control system Download PDF

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Publication number
CN108092275B
CN108092275B CN201711416593.XA CN201711416593A CN108092275B CN 108092275 B CN108092275 B CN 108092275B CN 201711416593 A CN201711416593 A CN 201711416593A CN 108092275 B CN108092275 B CN 108092275B
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pin
resistor
chip
capacitor
voltage
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CN108092275A (en
Inventor
王炜
蔡国伟
冯喜强
王洋
刘闯
黃哲洙
李践
李悦悦
张义德
郭东波
杭建国
李妍
宋鹏
隋伯昊
张阔
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State Grid Corp of China SGCC
Northeast Electric Power University
Shenyang Power Supply Co of State Grid Liaoning Electric Power Co Ltd
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State Grid Corp of China SGCC
Northeast Dianli University
Shenyang Power Supply Co of State Grid Liaoning Electric Power Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
    • H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
    • H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
    • H02J3/1842—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters
    • H02J3/1857—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters wherein such bridge converter is a multilevel converter
    • 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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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Ac-Ac Conversion (AREA)
  • Rectifiers (AREA)

Abstract

A DSP control system belongs to the technical field of power distribution network operation power distribution voltage regulation, and particularly relates to a DSP control system. The invention provides a DSP control system which is accurately and reliably controlled by combining with a voltage regulating structure of a power distribution network. The invention comprises a TMS320F28335 chip U500, wherein the pin 74 of the U500 is connected with the pin 2 of the U500 through a resistor R239 and a resistor R236 in sequence, and the pin 75 of the U500 is connected with the pin 141 of the U500 through a resistor R238 and a resistor R237 in sequence; the pin 113 of the U500 is respectively connected with the pin 1 of the 74ACT541 chip U7, the pin 19 of the U7 and one end of a resistor R30, and the other end of the resistor R30 is connected with a V3.3DP power supply; the pin 114 of the U500 is respectively connected with the pin 1 of the 74ACT541 chip U8, the pin 19 of the U8 and one end of a resistor R43, and the other end of the resistor R43 is connected with a V3.3DP power supply.

Description

DSP control system
Technical Field
The invention belongs to the technical field of power distribution network operation, power distribution and voltage regulation, and particularly relates to a DSP control system.
Background
With the rapid development of national economy, the load is rapidly increased, and the problem of power quality deterioration of the power distribution network caused by voltage drop, voltage sudden rise and the like of the power distribution network is increasingly outstanding. Voltage drop and sudden rise can influence normal operation of consumer electric equipment, and especially safety and stability operation of sensitive loads such as industrial process control, precise instruments, computer systems and the like. Although the voltage quality problem of the power distribution network is greatly emphasized, in the current practical application of the voltage regulation of the power distribution network, the voltage regulation through the reactive compensation device and the tap of the transformer has the problems of limited voltage regulation range, poor adaptability, low sensitivity and the like, cannot meet the requirement of real-time tracking compensation of the voltage, and is not applicable to some precise instruments and sensitive equipment; although the dynamic voltage regulator can realize the function of regulating and controlling the voltage of the electric equipment in real time, the voltage regulating range is limited, the depth and long-time voltage regulation cannot be performed, and the size and the cost of the equipment are increased due to the existence of the direct-current energy storage unit. Based on the above, it is necessary to provide a novel, practical, efficient, accurate and stable low-voltage power distribution network voltage regulation device aiming at the power quality problem caused by the current power distribution network voltage drop or sudden rise.
Disclosure of Invention
The invention aims at the problems and provides a DSP control system which is accurately and reliably controlled by combining with a voltage regulating structure of a power distribution network.
In order to achieve the purpose, the invention adopts the following technical scheme that the TMS320F28335 chip U500 is adopted, the pin 74 of the U500 is connected with the pin 2 of the U500 through the resistor R239 and the resistor R236 in sequence, and the pin 75 of the U500 is connected with the pin 141 of the U500 through the resistor R238 and the resistor R237 in sequence;
the pin 113 of the U500 is respectively connected with the pin 1 of the 74ACT541 chip U7, the pin 19 of the U7 and one end of a resistor R30, and the other end of the resistor R30 is connected with a V3.3DP power supply;
the pin 114 of the U500 is respectively connected with the pin 1 of the 74ACT541 chip U8, the pin 19 of the U8 and one end of a resistor R43, and the other end of the resistor R43 is connected with a V3.3DP power supply;
the pins 2 to 7 of the U7 are correspondingly connected with the pins 5, 6, 7, 10, 11 and 12 of the U500 respectively, the pin 8 of the U7 is grounded through a resistor R39, the pin 9 of the U7 is grounded through a resistor R40, the pin 20 of the U7 is connected with one end of a power supply V5DP and one end of a capacitor C44 respectively, and the other end of the capacitor C44 is grounded;
pins 2 to 7 of U8 are correspondingly connected with pins 13, 16, 17, 18, 19 and 20 of U500 respectively, pin 8 of U8 is grounded through a resistor R41, pin 9 of U8 is grounded through a resistor R42, pin 20 of U8 is connected with one end of a power supply V5DP and one end of a capacitor C45 respectively, and the other end of the capacitor C45 is grounded.
As a preferable scheme, the invention further comprises an indication part, wherein the indication part comprises a light emitting diode D12, a light emitting diode D13, a light emitting diode D31 and a light emitting diode D32, the anode of the light emitting diode D12 is connected with a V3.3DP power supply through a resistor R85, the cathode of the light emitting diode D12 is connected with a collector of an NPN triode Q3, a base of the triode Q3 is connected with a 153 pin of U500, and an emitter of the triode Q3 is grounded;
the anode of the light emitting diode D13 is connected with a V3.3DP power supply through a resistor R86, the cathode of the light emitting diode D13 is connected with the collector of an NPN triode Q4, the base of the triode Q4 is connected with the 156 pin of the U500, and the emitter of the triode Q4 is grounded;
the anode of the light emitting diode D31 is connected with a V3.3DP power supply through a resistor R119, the cathode of the light emitting diode D12 is connected with the collector of an NPN triode Q21, the base of the triode Q21 is connected with the pin 157 of the U500, and the emitter of the triode Q21 is grounded;
the anode of the light emitting diode D32 is connected with a V3.3DP power supply through a resistor R120, the cathode of the light emitting diode D32 is connected with the collector of an NPN triode Q22, the base of the triode Q22 is connected with a pin 158 of a U500, and the emitter of the triode Q22 is grounded.
As another preferable scheme, the invention further comprises an AD conversion part, the AD conversion part comprises an AD7865 chip U505, an AD7865 chip U512 and an SN74LVTH162245DGGR chip U506, pin 1 of U505 is connected with pin 162 of U500, pin 3 of U505 is connected with pin 175 of U500, pin 4 of U505 is connected with pin 1 of 74V1G08 chip U513, pin 5 of U505 is connected with pin 149 of U500, and pin 6 of U505 is connected with pin 148 of U500;
pin 1 of U512 is connected to pin 163 of U500, pin 3 of U505 is connected to pin 175 of U500, pin 4 of U505 is connected to pin 2 of U513 of the 74V1G08 chip, pin 5 of U505 is connected to pin 149 of U500, and pin 6 of U505 is connected to pin 148 of U500;
pins 1 and 24 of U506 are connected with pin 148 of U500, and pins 25 and 48 of U506 are connected with pin 4 of U513;
the pin 21 of the U505 is connected with the pin 1 of the TL084 chip U514, the pin 3 of the U514 is respectively connected with one end of a capacitor C122 and one end of a resistor R136, the other end of the capacitor C122 is grounded, the other end of the resistor R136 is respectively connected with one end of a resistor R135 and one end of a capacitor C119, and the other end of the capacitor C119 is respectively connected with the pins 1 and 2 of the U514; the other end of the resistor R135 is connected with the 6 pin of the INA148 chip U117, the 3 pin of the U117 is connected with the positive electrode of the load through the resistor R193, and the 2 pin of the U117 is connected with the negative electrode of the load through the resistor R194.
As another preferable scheme, the pin 42 of the U500 is connected with the output end of the operational amplifier U13 through a resistor R28, and the input end of the operational amplifier U13 is connected with an internal sampling detection port.
As another preferable scheme, the invention also comprises an ADuM5400/SOIC_W chip U3, a pin 3 of the U3 is connected with a pin 72 of a U500, a pin 4 of the U3 is connected with a pin 68 of the U500, a pin 5 of the U3 is connected with a pin 73 of the U500, a pin 14 of the U3 is connected with a pin 5 of a TLV5614IDR chip U10, a pin 13 of the U3 is connected with a pin 4 of the U10, a pin 12 of the U3 is connected with a pin 7 of the U10, a pin 11 of the U3 is connected with a base electrode of an NPN triode Q1, an emitter electrode of the triode Q1 is grounded, and a collector electrode of the triode Q1 is connected with a power supply V5DAC through a light emitting diode D9;
pin 14 of U10 is connected to pin 3 of OPA4350 chip U525, and pin 1 of U525 is connected to the BNC connector through resistor R53.
As another preferable scheme, the invention also comprises a power supply part, wherein the power supply part comprises a TPS767D301 chip U2, a CC6-1205SF-E chip U144 and a CC6-1212DF-E chip U145, the 28 pins of the U2 are respectively connected with one end of a resistor R7 and the 80 pins of a U500 through a resistor R6, and the other end of the resistor R7 is connected with the 22 pins of the U2;
the 1 pin of the U144 is connected with the V24P power end, the 2 pin and the 3 pin of the U144 are connected with the V24N power end, the 7 pin of the U144 is respectively connected with the V5DP_C end, one end of the capacitor C184 and one end of the capacitor C123, the other end of the capacitor C184 is respectively connected with one end R232, the 5 pin of the U144 and the DGND_C end, and the other end of the capacitor C123 is connected with the DGND_C end;
the 1 foot of U145 links to each other with V24P power end, and the 2, 3 feet of U145 link to each other with V24N power end, and the 7 foot of U145 links to each other with V15DP_C end, electric capacity C185 one end, electric capacity C127 one end respectively, and the electric capacity C185 other end links to each other with electric capacity C186 one end, the 5 foot of U145, electric capacity C129 one end, AGND_C end respectively, and the electric capacity C186 other end links to each other with V15DN_C end, resistance R234, the 4 feet of U145, the electric capacity C129 other end respectively.
As another preferable scheme, the 80 pin of the U500 is connected with the EASYDSP_RESET end through a resistor R12; the pin 105 of the U500 is connected with the pin 3 of the OSC chip through a resistor R23, the pin 4 of the OSC chip is respectively connected with one end of a capacitor C36, one end of a capacitor C39 and one end of an inductor L10, the other end of the inductor L10 is connected with the end V3.3DP, and the other end of the capacitor C36 is respectively connected with the other end of the capacitor C39 and the end DGND.
Secondly, the invention also comprises a TL084 chip U522, wherein the 3 pin of the U522 is connected with the cathode end of the BAV99/SOT chip D1 through a resistor R165, the 2 pin of the U522 is connected with the anode end of the D1 through a resistor R166, and the public end of the D1 is connected with the 21 end of the U505;
the 2 pin of U522 is connected with the cathode end of BAV99/SOT chip D2 through resistor R169, the anode end of D2 is connected with the 1 pin of U522, the public end of D2 is connected with the 2 pin of LM293 chip U521 through resistor R185, the 3 pin of U521 is connected with one end of resistor R223, one end of capacitor C180, one end of resistor R221 and the regulating end of varistor R222 respectively, one fixed end of varistor R222 is connected with the AGND end, the other end of resistor R223 and the other end of capacitor C180 respectively, the other end of resistor R221 is connected with the REF10V end, and the 1 pin of U521 is connected with the 21 pin of U500;
the REF10V terminal is connected with pin 1 of the LM2904 chip U520, pin 2 of the U520 is connected with pin 1 of the U520, pin 3 of the U520 is connected with pin 6 of the REF102 chip U141, and pin 2 of the U141 is connected with the V15DP terminal.
In addition, the invention also comprises a TLE6250GV33 chip U17, wherein the 1 pin of the U17 is connected with the 176 pin of the U500, the 4 pin of the U17 is connected with the 1 pin of the U500 through a resistor R47, the 7 pin of the U17 is connected with the 2 pin of the ACT45B-510-2P chip U12, and the 3 pin of the U12 is connected with the CANH end; the 6 pin of U17 links to each other with the 1 pin of U12, and the 4 pin of U12 links to each other with the CANL end, and the CANL end links to each other with the CANH end through resistance R50.
The invention has the beneficial effects that.
According to the invention, through the cooperation of the TMS320F28335 chip and the two 74ACT541 chips, a specific connecting circuit is designed, and a precise and reliable PWM signal is output to drive a switching tube to be combined with a voltage regulating structure of a power distribution network; the distributed flexible voltage regulation of the whole power distribution network is realized, and the voltage quality and the voltage qualification rate of the user side are ensured.
Drawings
The invention is further described below with reference to the drawings and the detailed description. The scope of the present invention is not limited to the following description.
Fig. 1 is a schematic diagram of a single-phase voltage regulation structure of a power distribution network provided by the invention.
Fig. 2 is a voltage regulation topology structure diagram of a power distribution network provided by the invention.
Fig. 3 is a schematic diagram of the invention when regulating voltage drop.
FIG. 4 is a schematic diagram of the regulated voltage surge of the present invention.
Fig. 5 is a schematic diagram of a three-phase voltage regulation structure according to the present invention.
FIG. 6 is a plot of the control signal profile of the DSP of the present invention.
Fig. 7 is a schematic diagram of a modulated signal of a dual buck/boost AC-AC converter module according to the present invention.
FIGS. 8-1, 8-2, 8-3, 8-4, 8-5, 8-6, 8-7, and 8-8 are schematic diagrams of power supply modules of the DSP control system of the present invention.
FIGS. 9-1, 9-2, 9-3 and 9-4 are schematic diagrams of the circuit of the pin module of the DSP chip of the DSP control system of the invention.
FIGS. 10-1, 10-2 and 10-3 are schematic diagrams of the pin module of the DSP chip of the DSP control system of the invention.
FIGS. 11-1, 11-2, 11-3, and 11-4 are schematic diagrams of eight-way buffer/line driver circuits for a DSP control system of the present invention.
Fig. 12-1, fig. 12-2, and fig. 12-3 are schematic circuit diagrams of AD conversion modules of the DSP control system of the present invention.
Fig. 13-1, fig. 13-2, fig. 13-3, fig. 13-4, fig. 13-5, fig. 13-6, fig. 13-7, fig. 13-8 are schematic circuit diagrams of an external sampling module of the AD of the DSP control system of the present invention.
FIGS. 14-1, 14-2, 14-3, 14-4, and 14-5 are schematic diagrams of the DSP control system of the present invention.
FIGS. 15-1, 15-2, 15-3 and 15-4 are schematic diagrams of the internal sampling circuits of the AD control system of the invention.
FIGS. 16-1, 16-2, 16-3, 16-4, 16-5, and 16-6 are schematic circuit diagrams of the DSP control system of the present invention.
FIGS. 17-1 and 17-2 are schematic diagrams of the wiring terminal circuit of the DSP control system of the present invention.
Detailed Description
As shown in the figure, the invention can be applied to a distributed flexible voltage regulating topological structure of a power distribution network based on an AC-AC converter, the distributed flexible voltage regulating topological structure of the power distribution network based on the AC-AC converter comprises a power frequency double-split transformer, a first double-buck/boost type AC-AC converter module, a second double-buck/boost type AC-AC converter module, an inductor L, a capacitor C and a bypass switch S, wherein a first secondary side of the power frequency double-split transformer is connected with an input end of the first double-buck/boost type AC-AC converter module, a second secondary side of the power frequency double-split transformer is connected with an input end of the second double-buck/boost type AC-AC converter module, one end of an output end of the first double-buck/boost type AC-AC converter module is respectively connected with one end of the capacitor C and one end of the bypass switch S, and the other end of the output end of the second double-buck/boost type AC-AC converter module is respectively connected with the other end of the capacitor C and the other end of the bypass switch S;
the power frequency double-split transformer has different identical-name end positions of a first secondary side and a second secondary side, and the input voltage polarities of a first double-buck/boost type AC-AC converter module and a second double-buck/boost type AC-AC converter module are different.
The distributed flexible voltage regulation topological structure of the power distribution network of the direct AC-AC converter has the advantages of large voltage regulation range and high precision, and can achieve the purpose of regulating voltage drop or sudden rise of the power distribution network under the condition of not changing the grid structure of the existing power distribution network, thereby ensuring the qualification rate of the voltage of a user terminal and improving the power supply quality. The power frequency double-split transformer and the 2 double-buck/boost type AC-AC converter modules are coupled in series, so that the single-stage power conversion from bipolar voltage AC to AC is realized. In addition, the grid is connected in series, the existing grid structure is not changed, and voltage drop and voltage sudden rise can be compensated. In addition, as the double buck/boost type AC-AC converter module is adopted, a bidirectional switch is not needed, and the current conversion problem of the traditional AC-AC converter is solved.
The power frequency split transformer adopts a double split transformer with two windings at the secondary side, the high-voltage side of the double split transformer is connected with a certain phase of a power distribution network in parallel, the low-voltage side of the double split transformer is connected with a double buck/boost type AC-AC converter module, and the identical-name end positions of the two split windings at the low-voltage side are different, so that the polarity difference of input voltage is realized, and the aims of compensating voltage drop and voltage surge are fulfilled.
The L, C filter is used for filtering high-frequency harmonic components generated by the double buck/boost type AC-AC converter module and improving the quality of output voltage of the voltage regulating device. The bypass switch S can ensure the switching operation of the voltage regulator, so that the voltage regulator can select whether to operate in the voltage compensation mode or the bypass mode according to the actual operation condition of the power grid.
The invention can realize the single-stage power conversion from bipolar voltage AC to AC, and has high conversion efficiency. And the direct AC-to-AC conversion omits the middle direct current link, and the volume and the cost of the device are greatly reduced.
The voltage regulating device based on the topological structure is connected in series to the power grid, does not change the existing grid structure of the power distribution network, can compensate voltage drop and voltage surge, and achieves the purpose of regulating and controlling the distribution voltage. In addition, the voltage regulating device can achieve large voltage regulating range and high voltage regulating precision, and can achieve deep and long-term voltage regulating.
The invention adopts the double buck/boost type AC-AC converter module, thereby effectively solving the problem of current conversion of the traditional AC-AC converter, and even when the input voltage or current has great distortion, the voltage regulating device can still reliably and stably operate, and the problem of current conversion can not occur. In addition, the capacitor at the input side of the double buck/boost type AC-AC converter does not need to carry out voltage balance control, so that the complexity of converter control is reduced.
The power frequency double-split transformer plays a role in electric isolation on one hand, and on the other hand, input voltage can be provided for the double-buck/boost type AC-AC converter module, wherein the high-voltage side of the power frequency double-split transformer is connected with a certain single phase of the power distribution network in parallel, the two windings on the low-voltage side are respectively connected with the double-buck/boost type AC-AC converter module, and the homonymous end positions of the two windings on the low-voltage side are different, so that the power frequency double-split transformer can provide input voltage with different polarities for the double-buck/boost type AC-AC converter module, and the voltage regulator can regulate sudden voltage rise and voltage drop.
The first dual buck/boost AC-AC converter module includes a filter inductance L f1 Capacitance C 1 Switch tube S 1 Diode D 1 Diode D 2 Coupled inductor CL 1 Switch tube S 2 Switch tube S 3 Diode D 3 Capacitance C 2 Coupled inductor CL 2 Diode D 4 Switch tube S 4 ；
The second dual buck/boost type AC-AC converter module includes a filter inductance L f2 Capacitance C 3 Switch tube S 5 Diode D 5 Diode D 6 Coupled inductor CL 3 Switch tube S 6 Switch tube S 7 Diode D 7 Capacitance C 4 Coupled inductor CL 4 Diode D 8 Switch tube S 8 ；
Inductance L f1 One end of the inductor L is connected with one end of the first secondary side of the power frequency double-split transformer f1 The other end is respectively connected with the capacitor C 1 One end, switch tube S 1 Collector, diode D 1 Cathode is connected with a switch tube S 1 Emitter and diode D respectively 2 Cathode, coupled inductance coil CL 1 One end of the first inductor is connected with the coupling inductance coil CL 1 The other end of the first inductor is respectively connected with the coupled inductor coil CL 1 One end of the second inductor is connected with the inductor L, and the inductor L is coupled 1 The other end of the second inductor is respectively connected with the switch tube S 2 Collector, diode D 1 The anode is connected;
switch tube S 2 Emitter and switch tube S respectively 3 Emitter, diode D 2 Anode, diode D 3 Anode, capacitor C 1 Another end, capacitor C 2 One end is connected with a switch tube S 3 Collector electrodes are respectively connected with the coupled inductance coil CL 2 One end of the first inductor and the diode D 4 Anode is connected with, coupled with inductance coil CL 2 The other end of the first inductor is respectively connected with the coupled inductor coil CL 2 One end of the second inductor is coupled with the inductance coil CL 3 One end of the first inductor is coupled with the inductance coil CL 3 One end of the second inductor is connected with the coupling inductance coil CL 2 The other end of the second inductor is respectively connected with a diode D 3 Cathode, switch tube S 4 Emitter is connected with a switch tube S 4 Collector electrodes are respectively connected with a capacitor C 2 Another end, diode D 4 The cathode and the other end of the first secondary side of the power frequency double-split transformer are connected;
inductance Lf 2 One end of the inductor Lf is connected with one end of the second secondary side of the power frequency double-split transformer 2 The other end is respectively connected with the capacitor C 3 One end, switch tube S 5 Collector, diode D 5 Cathode is connected with a switch tube S 5 Emitter and diode D respectively 6 Cathode, coupled inductance coil CL 3 The other end of the first inductor is connected with the coupling inductance coil CL 3 The other end of the second inductor is respectively connected with the switch tube S 6 Collector, diode D 5 The anode is connected;
switch tube S 6 Emitter and switch tube S respectively 7 Emitter, diode D 6 Anode, diode D 7 Anode, capacitor C 3 Another end, capacitor C 4 One end is connected with a switch tube S 7 Collector electrodes are respectively connected with the coupled inductance coil CL 4 One end of the first inductor and the diode D 8 Anode is connected with, coupled with inductance coil CL 4 The other end of the first inductor is respectively connected with the coupled inductor coil CL 4 One end of the second inductor is connected with the capacitor C, and the inductor coil CL is coupled 4 The other end of the second inductor is respectively connected with a diode D 7 Cathode, switch tube S 8 Emitter is connected with a switch tube S 8 Collector electrodes are respectively connected with a capacitor C 4 Another end, diode D 8 The cathode and the other end of the second secondary side of the power frequency double-split transformer are connected.
The double-buck/boost type AC-AC converter module adopts a novel topological structure, solves the problem of current conversion of the traditional AC-AC converter, and can ensure safe and reliable operation even if the input voltage or current has large harmonic content and large distortion. One end of each of the 2 double buck/boost AC-AC converter modules is connected with two windings on the low-voltage side of the double-split transformer respectively, the other end of each of the 2 double buck/boost AC converter modules is connected with the two modules in series, and the output ends of the 2 double buck/boost AC-AC converter modules are connected with the L, C filter and then connected into a power grid in series.
The topology of the dual buck/boost AC-AC converter of the present invention is shown with reference to fig. 2, which is made up of 2 identical modules, module 1 being made up of 1L f Input filter, 2 capacitors (C 1 、C 2 ) 2 coupled inductance Coils (CL) 1 、CL 2 ) The 4 arms (see arms 1, 2, 3, and 4 shown in fig. 2) form a full-bridge structure. Every 2 bridge arms form an H bridge unit, and for the H bridge unit, the H bridge unit is composed of a front bridge arm (1, 3) and a rear bridge arm (2, 4), and the front bridge arm is respectively composed of 1 full-control power switch tube (S 1 、S 4 ) And 1 diode (D 2 、D 3 The emitter of the full-control power switch tube is connected with the negative polarity of the diode; the rear bridge arm is respectively formed by 1 full-control power switch tube (S) 2 、S 3 (ii) and 1 diode (D) 1 、D 4 ) The full-control power switch tube is formed by reverse series connection, the collector electrode of the full-control power switch tube is connected with the positive polarity of the diode, and the full-control power switch tube is preferably an Insulated Gate Bipolar Transistor (IGBT). Each H bridge arm is connected with a capacitor C in parallel, and the purpose of the capacitor C is to provide an energy channel for current when all the fully-controlled power switching tubes are on or off. In addition, 2 coupling inductances (CL 1 、CL 2 ) The module 2 is connected with the upper H bridge arm and the lower H bridge arm respectively, and adopts the same topological structure as the module 1, so that the description is omitted. The input ends of the 2 modules are respectively connected with the low-voltage side of the power frequency double-split transformer, and the output ends of the 2 modules are connected in series and then connected with the L, C low-pass filter, so that parallel input and series output are realized. The use of the module increases the efficiency of the overall voltage regulator, as the module can achieve a single stage power conversion of bipolar voltage AC to AC. In addition, compared with the conventional AC-AC converter, the AC-AC converter formed by the module can effectively solve the problem of current conversion, and the AC-AC converter can reliably and stably operate even when the input voltage/current is distorted. In contrast to a conventional AC-AC converter module, the 2 capacitors C in the module provide a circulating loop for the current in the coupled inductor, and thus the 2 capacitors C in the module do not require voltage balancing control when the fully controlled power switching transistors are all off.
The switch tube S 1 Switch tube S 2 Switch tube S 3 Switch tube S 4 Switch tube S 5 Switch tube S 6 Switch tube S 7 Opening and closingClosing tube S 8 And a full-control power switch tube is adopted.
The inductance L f1 Connection end and inductance L of first secondary side of power frequency double-split transformer f2 The connection end with the second secondary side of the power frequency double-split transformer is a heteronymous end.
The inductor L adopts 400 mu H inductor, the frequency of the switching tube is 20kHz, and the capacitance value of the capacitor C is mu F. The maximum value of the inductance current ripple of the power converter is generally 10% to 30% of the current peak value, and the current ripple Δimax is:wherein V is 0 For the filter input side voltage, T s For the switching period, the high-frequency filter inductance L can be selected to be 400 mu H according to a formula; because the frequency of the power switching tube adopted in the experiment is 20kHz, the cut-off frequency f r The filter inductance is 400 mu H and is 10 to 20 percent of the frequency of the switching tube, and the filter inductance is a resonance formula +.>And the capacitance value is obtained, the calculated value is combined with experiments and simulations, the inductance value and the capacitance value of the final L, C filter are respectively selected to be 400 mu H and 20 mu F, and finally selected parameters enable the designed L, C filter to be small in size, low in cost and good in filtering effect.
The transformation ratio of the primary side, the first secondary side and the second secondary side of the power frequency double-split transformer is N 1 ：N 2 ：N 3 =4: 3:1. at present, in the voltage fluctuation problem of a 10/0.4kV power distribution network, voltage drop is about 92%, voltage sudden rise is only a small part, and the voltage drop amplitude is much larger than the voltage sudden rise amplitude. Therefore, the transformation ratio of the power frequency double-split transformer is designed to be N 1 ：N 2 ：N 3 =4: 3:1, the actual requirement of power distribution network voltage regulation can be met by adopting the transformation ratio design; on the other hand, the volume and the cost of the power frequency double-split transformer can be reduced.
The switch tube S 1 Switch tube S 2 Switch tube S 3 Switch tube S 4 SwitchTube S 5 Switch tube S 6 Switch tube S 7 Switch tube S 8 With anti-parallel diodes.
The fully-controlled power switch tube adopts an insulated gate bipolar transistor IGBT.
When the power grid voltage fluctuates, the bypass switch S is opened, and the voltage regulating device works in a compensation mode to generate the same-phase compensation voltage U C Load side voltage U Load Equal to the grid voltage U in And compensation voltage U C Algebraic sum of (2); when the power grid voltage does not fluctuate, the bypass switch S is closed, the voltage regulating device works in the bypass mode, and the voltage at the load side is equal to the power grid voltage. The L, C filter is connected with the output end of the double buck/boost type AC-AC converter and is used for filtering high-frequency harmonic components generated by the double buck/boost type AC-AC converter module so as to ensure the quality of the generated compensation voltage. The bypass switch S is used for ensuring the switching operation of the voltage regulating device, so that the voltage regulating device can select whether to work in a voltage compensation mode or a bypass mode according to the actual operation condition of the power grid. Referring to fig. 3, when the grid voltage fluctuates, the bypass switch S is turned on, and the voltage regulator operates in the compensation mode to generate the compensation voltage U with the same phase C . Therefore, the load side voltage U Load Equal to the grid voltage U in And compensation voltage U C The algebraic sum of the voltage on the load side is ensured, and the qualification rate of the power supply voltage is ensured; when the power grid voltage does not fluctuate, the bypass switch S is closed, the voltage regulating device works in the bypass mode, and the voltage at the load side is equal to the power grid voltage.
The dual buck/boost type AC-AC converter module adopts dual modulation ratio unipolar pulse width modulation, and the modulation ratio of the first dual buck/boost type AC-AC converter module and the second dual buck/boost type AC-AC converter module is d respectively 1 、d 2 The compensation voltage generated is:
when the modulation ratio isWhen the voltage is 0, the compensation voltage generated by the double buck/boost type AC-AC converter is 0; when the modulation is not equal to 0, the dual buck/boost AC-AC converter generates a compensation voltage U C The method comprises the steps of carrying out a first treatment on the surface of the Referring to fig. 3, when the voltage on the grid side drops, the voltage regulator generates the voltage with the same phase to regulate the voltage, the bypass switch S (which can be manually switched) is opened, and the voltage regulator works in a compensation voltage mode; at this time, the load side peak voltage U acquired by the voltage peak detector Loadm Peak value of reference voltage U refm (U refm Equal to the rated voltage peak value of the power grid) to obtain a difference value delta U, then generating corresponding duty ratios through a PI regulator, and respectively controlling the modulation ratio d of the first dual buck/boost type AC-AC converter module and the second dual buck/boost type AC-AC converter module through a DSP 1 、d 2 The in-phase compensation voltages are generated for a suitable value. Referring to FIG. 3, the modulation ratio d of the module 1 is shown 1 The modulation ratio of the module 2 is d 2 Operating state topology at=0, it is obvious to those skilled in the art from reference to fig. 3 that the two modulation ratios are d 1 、d 2 The following four working states.
When the voltage of the network side rises suddenly, the voltage regulating device needs to generate the same-phase voltage to regulate the voltage, the bypass switch S is opened, the voltage regulating device works in a compensation voltage mode, and the modulation ratio d of the module 1 and the module 2 is controlled respectively 1 、d 2 The in-phase compensation voltages are generated for a suitable value. Referring to FIG. 4, the modulation ratio of module 1 is d 1 =0, modulation ratio of module 2 is d 2 The topology of the operating states at this time is apparent to those skilled in the art from the reference to fig. 4 in that the two modulation ratios are d respectively 1 、d 2 The following four working states.
The invention provides a DSP control system for each phase of three-phase power. Fig. 5 is a schematic diagram of a three-phase voltage regulating structure of the present invention, in which the present invention can be extended to three-phase voltage regulating, each phase is separately connected in series to the distributed flexible voltage regulating device of the present invention (three single-phase voltage regulating structures of the present invention are respectively provided, and are not connected with each other), the three-phase voltage regulating device phase and phase do not interfere with each other, and independently work, each phase can regulate voltage drop or surge, thereby realizing distributed flexible voltage regulation of the whole power distribution network, and guaranteeing voltage quality and voltage qualification rate at the user side.
And the DSP sends PWM signals to drive the IGBT tube through the IGBT driver.
The PWM signal is generated by comparing a modulated wave with a carrier wave.
As shown in fig. 6, the DSP controller sends out PWM signals (the PWM signals sent by the DSP controller are generated by comparing modulated waves with carrier waves, wherein the modulated signals of one module are shown in fig. 7), the sent PWM signals are transferred to the IGBT driver, and the driver controls the turn-on and turn-off of the IGBT switching tube according to the received signals.
The IGBT driver adopts a 2SC0435T driver.
The DSP adopts a TMS320F28335 chip U500, a pin 74 of the U500 is connected with a pin 2 of the U500 through a resistor R239 and a resistor R236 in sequence, and a pin 75 of the U500 is connected with a pin 141 of the U500 through a resistor R238 and a resistor R237 in sequence;
the pin 113 of the U500 is respectively connected with the pin 1 of the 74ACT541 chip U7, the pin 19 of the U7 and one end of a resistor R30, and the other end of the resistor R30 is connected with a V3.3DP power supply;
the pin 114 of the U500 is respectively connected with the pin 1 of the 74ACT541 chip U8, the pin 19 of the U8 and one end of a resistor R43, and the other end of the resistor R43 is connected with a V3.3DP power supply;
the pins 2 to 7 of the U7 are correspondingly connected with the pins 5, 6, 7, 10, 11 and 12 of the U500 respectively, the pin 8 of the U7 is grounded through a resistor R39, the pin 9 of the U7 is grounded through a resistor R40, the pin 20 of the U7 is connected with one end of a power supply V5DP and one end of a capacitor C44 respectively, and the other end of the capacitor C44 is grounded;
pins 2 to 7 of U8 are correspondingly connected with pins 13, 16, 17, 18, 19 and 20 of U500 respectively, pin 8 of U8 is grounded through a resistor R41, pin 9 of U8 is grounded through a resistor R42, pin 20 of U8 is connected with one end of a power supply V5DP and one end of a capacitor C45 respectively, and the other end of the capacitor C45 is grounded.
The invention also comprises an indication part, wherein the indication part comprises a light emitting diode D12, a light emitting diode D13, a light emitting diode D31 and a light emitting diode D32, the anode of the light emitting diode D12 is connected with a V3.3DP power supply through a resistor R85, the cathode of the light emitting diode D12 is connected with the collector of an NPN triode Q3, the base of the triode Q3 is connected with the 153 pin of U500, and the emitter of the triode Q3 is grounded;
the anode of the light emitting diode D13 is connected with a V3.3DP power supply through a resistor R86, the cathode of the light emitting diode D13 is connected with the collector of an NPN triode Q4, the base of the triode Q4 is connected with the 156 pin of the U500, and the emitter of the triode Q4 is grounded;
the anode of the light emitting diode D31 is connected with a V3.3DP power supply through a resistor R119, the cathode of the light emitting diode D12 is connected with the collector of an NPN triode Q21, the base of the triode Q21 is connected with the pin 157 of the U500, and the emitter of the triode Q21 is grounded;
the anode of the light emitting diode D32 is connected with a V3.3DP power supply through a resistor R120, the cathode of the light emitting diode D32 is connected with the collector of an NPN triode Q22, the base of the triode Q22 is connected with a pin 158 of a U500, and the emitter of the triode Q22 is grounded.
The invention also comprises an AD conversion part, wherein the AD conversion part comprises an AD7865 chip U505, an AD7865 chip U512 and an SN74LVTH162245DGGR chip U506, the 1 pin of the U505 is connected with the 162 pin of the U500, the 3 pin of the U505 is connected with the 175 pin of the U500, the 4 pin of the U505 is connected with the 1 pin of the 74V1G08 chip U513, the 5 pin of the U505 is connected with the 149 pin of the U500, and the 6 pin of the U505 is connected with the 148 pin of the U500;
pin 1 of U512 is connected to pin 163 of U500, pin 3 of U505 is connected to pin 175 of U500, pin 4 of U505 is connected to pin 2 of U513 of the 74V1G08 chip, pin 5 of U505 is connected to pin 149 of U500, and pin 6 of U505 is connected to pin 148 of U500;
pins 1 and 24 of U506 are connected with pin 148 of U500, and pins 25 and 48 of U506 are connected with pin 4 of U513;
the pin 21 of the U505 is connected with the pin 1 of the TL084 chip U514, the pin 3 of the U514 is respectively connected with one end of a capacitor C122 and one end of a resistor R136, the other end of the capacitor C122 is grounded, the other end of the resistor R136 is respectively connected with one end of a resistor R135 and one end of a capacitor C119, and the other end of the capacitor C119 is respectively connected with the pins 1 and 2 of the U514; the other end of the resistor R135 is connected with the 6 pins of the INA148 chip U117, the 3 pins of the U117 are connected with the positive electrode of the load through the resistor R193, and the 2 pins of the U117 are connected with the negative electrode of the load through the resistor R194 (the part is an external sampling port used for closed loop control and collecting the quantity to be controlled in the closed loop, including voltage and current digital signals).
And pin 42 of the U500 is connected with the output end of the operational amplifier U13 through a resistor R28, and the input end of the operational amplifier U13 is connected with the internal sampling detection port.
The invention also comprises an ADuM5400/SOIC_W chip U3, a pin 3 of the U3 is connected with a pin 72 of the U500, a pin 4 of the U3 is connected with a pin 68 of the U500, a pin 5 of the U3 is connected with a pin 73 of the U500, a pin 14 of the U3 is connected with a pin 5 of a TLV5614IDR chip U10, a pin 13 of the U3 is connected with a pin 4 of the U10, a pin 12 of the U3 is connected with a pin 7 of the U10, a pin 11 of the U3 is connected with a base electrode of an NPN triode Q1, an emitter electrode of the triode Q1 is grounded, and a collector electrode of the triode Q1 is connected with a power supply V5DAC through a light emitting diode D9;
pin 14 of U10 is connected to pin 3 of OPA4350 chip U525 and pin 1 of U525 is connected to the BNC connector via resistor R53 (this part is a DAC, i.e., a digital-to-analog converter, for converting digital signals to analog signals).
The invention also comprises a power supply part, wherein the power supply part comprises a TPS767D301 chip U2, a CC6-1205SF-E chip U144 and a CC6-1212DF-E chip U145, the 28 pins of the U2 are respectively connected with one end of a resistor R7 and the 80 pins of a U500 through a resistor R6, and the other end of the resistor R7 is connected with the 22 pins of the U2;
the 1 pin of the U144 is connected with the V24P power end, the 2 pin and the 3 pin of the U144 are connected with the V24N power end, the 7 pin of the U144 is respectively connected with the V5DP_C end, one end of the capacitor C184 and one end of the capacitor C123, the other end of the capacitor C184 is respectively connected with one end R232, the 5 pin of the U144 and the DGND_C end, and the other end of the capacitor C123 is connected with the DGND_C end;
the 1 foot of U145 links to each other with V24P power end, and the 2, 3 feet of U145 link to each other with V24N power end, and the 7 foot of U145 links to each other with V15DP_C end, electric capacity C185 one end, electric capacity C127 one end respectively, and the electric capacity C185 other end links to each other with electric capacity C186 one end, the 5 foot of U145, electric capacity C129 one end, AGND_C end respectively, and the electric capacity C186 other end links to each other with V15DN_C end, resistance R234, the 4 feet of U145, the electric capacity C129 other end respectively.
The 80 pin of the U500 is connected with the EASYDSP_RESET end through a resistor R12; the pin 105 of the U500 is connected with the pin 3 of the OSC chip through a resistor R23, the pin 4 of the OSC chip is respectively connected with one end of a capacitor C36, one end of a capacitor C39 and one end of an inductor L10, the other end of the inductor L10 is connected with the end V3.3DP, and the other end of the capacitor C36 is respectively connected with the other end of the capacitor C39 and the end DGND.
The invention also comprises a TL084 chip U522, wherein the 3 pin of the U522 is connected with the cathode end of the BAV99/SOT chip D1 through a resistor R165, the 2 pin of the U522 is connected with the anode end of the D1 through a resistor R166, and the public end of the D1 is connected with the 21 end of the U505;
the 2 pin of U522 is connected with the cathode end of BAV99/SOT chip D2 through resistor R169, the anode end of D2 is connected with the 1 pin of U522, the public end of D2 is connected with the 2 pin of LM293 chip U521 through resistor R185, the 3 pin of U521 is connected with one end of resistor R223, one end of capacitor C180, one end of resistor R221 and the regulating end of varistor R222 respectively, one fixed end of varistor R222 is connected with the AGND end, the other end of resistor R223 and the other end of capacitor C180 respectively, the other end of resistor R221 is connected with the REF10V end, and the 1 pin of U521 is connected with the 21 pin of U500;
the REF10V terminal is connected with pin 1 of the LM2904 chip U520, pin 2 of the U520 is connected with pin 1 of the U520, pin 3 of the U520 is connected with pin 6 of the REF102 chip U141, and pin 2 of the U141 is connected with the V15DP terminal.
The invention also comprises a TLE6250GV33 chip U17, wherein the 1 pin of the U17 is connected with the 176 pin of the U500, the 4 pin of the U17 is connected with the 1 pin of the U500 through a resistor R47, the 7 pin of the U17 is connected with the 2 pin of the ACT45B-510-2P chip U12, and the 3 pin of the U12 is connected with the CANH end; the 6 pin of U17 links to each other with the 1 pin of U12, and the 4 pin of U12 links to each other with the CANL end, and the CANL end links to each other with the CANH end through resistance R50.
Compared with the existing structure, the topology structure provided by the invention realizes single-stage power conversion from bipolar voltage AC to AC, and has high conversion efficiency; compared with the traditional dynamic voltage restorer (Dynamic Voltage RestorerDVR), the invention can realize the fluctuation of the adjusting voltage for a long time and depth, and solve the problems of high and low voltage at the load side from the feeder end of the distribution network; in addition, the voltage regulating structure provided by the invention does not adopt a large-capacity capacitor, so that the volume of the device and the operation and maintenance cost are reduced, and the existing grid structure of the power distribution network is not changed when the voltage regulating structure is connected in series with the power distribution network.
The parameters of the constructed experimental prototype are as follows:
due to limited laboratory conditions, the peak grid voltage is specified to be 155.5V as indicated in the table above, and the actual voltage is adjusted accordingly by the autotransformer according to the mode of operation of the regulator to be verified.
It should be understood that the foregoing detailed description of the present invention is provided for illustration only and is not limited to the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention may be modified or substituted for the same technical effects; as long as the use requirement is met, the invention is within the protection scope of the invention.

Claims (4)

1. A DSP control system comprises a TMS320F28335 chip U500, and is characterized in that a pin 74 of the U500 is connected with a pin 2 of the U500 through a resistor R239 and a resistor R236 in sequence, and a pin 75 of the U500 is connected with a pin 141 of the U500 through a resistor R238 and a resistor R237 in sequence;
the pin 113 of the U500 is respectively connected with the pin 1 of the 74ACT541 chip U7, the pin 19 of the U7 and one end of a resistor R30, and the other end of the resistor R30 is connected with a V3.3DP power supply;
the pin 114 of the U500 is respectively connected with the pin 1 of the 74ACT541 chip U8, the pin 19 of the U8 and one end of a resistor R43, and the other end of the resistor R43 is connected with a V3.3DP power supply;
the pins 2 to 7 of the U7 are correspondingly connected with the pins 5, 6, 7, 10, 11 and 12 of the U500 respectively, the pin 8 of the U7 is grounded through a resistor R39, the pin 9 of the U7 is grounded through a resistor R40, the pin 20 of the U7 is connected with one end of a power supply V5DP and one end of a capacitor C44 respectively, and the other end of the capacitor C44 is grounded;
the pins 2 to 7 of the U8 are correspondingly connected with 13, 16, 17, 18, 19 and 20 of the U500 respectively, the pin 8 of the U8 is grounded through a resistor R41, the pin 9 of the U8 is grounded through a resistor R42, the pin 20 of the U8 is connected with one end of a power supply V5DP and one end of a capacitor C45 respectively, and the other end of the capacitor C45 is grounded;
the LED display device also comprises an indication part, wherein the indication part comprises a light emitting diode D12, a light emitting diode D13, a light emitting diode D31 and a light emitting diode D32, the anode of the light emitting diode D12 is connected with a V3.3DP power supply through a resistor R85, the cathode of the light emitting diode D12 is connected with the collector of an NPN triode Q3, the base of the triode Q3 is connected with the 153 pin of U500, and the emitter of the triode Q3 is grounded;
the anode of the light emitting diode D13 is connected with a V3.3DP power supply through a resistor R86, the cathode of the light emitting diode D13 is connected with the collector of an NPN triode Q4, the base of the triode Q4 is connected with the 156 pin of the U500, and the emitter of the triode Q4 is grounded;
the anode of the light emitting diode D31 is connected with a V3.3DP power supply through a resistor R119, the cathode of the light emitting diode D12 is connected with the collector of an NPN triode Q21, the base of the triode Q21 is connected with the pin 157 of the U500, and the emitter of the triode Q21 is grounded;
the anode of the light emitting diode D32 is connected with a V3.3DP power supply through a resistor R120, the cathode of the light emitting diode D32 is connected with the collector of an NPN triode Q22, the base of the triode Q22 is connected with a pin 158 of U500, and the emitter of the triode Q22 is grounded;
the circuit also comprises an AD conversion part, wherein the AD conversion part comprises an AD7865 chip U505, an AD7865 chip U512 and an SN74LVTH162245DGGR chip U506, the 1 pin of the U505 is connected with the 162 pin of the U500, the 3 pin of the U505 is connected with the 175 pin of the U500, the 4 pin of the U505 is connected with the 1 pin of the 74V1G08 chip U513, the 5 pin of the U505 is connected with the 149 pin of the U500, and the 6 pin of the U505 is connected with the 148 pin of the U500;
pin 1 of U512 is connected to pin 163 of U500, pin 3 of U512 is connected to pin 175 of U500, pin 4 of U512 is connected to pin 2 of U513 of the 74V1G08 chip, pin 5 of U512 is connected to pin 149 of U500, and pin 6 of U512 is connected to pin 148 of U500.
Pins 1 and 24 of U506 are connected with pin 148 of U500, and pins 25 and 48 of U506 are connected with pin 4 of U513;
the pin 21 of the U505 is connected with the pin 1 of the TL084 chip U514, the pin 3 of the U514 is respectively connected with one end of a capacitor C122 and one end of a resistor R136, the other end of the capacitor C122 is grounded, the other end of the resistor R136 is respectively connected with one end of a resistor R135 and one end of a capacitor C119, and the other end of the capacitor C119 is respectively connected with the pins 1 and 2 of the U514; the other end of the resistor R135 is connected with the 6 pin of the INA148 chip U117, the 3 pin of the U117 is connected with the positive electrode of the load through a resistor R193, and the 2 pin of the U117 is connected with the negative electrode of the load through a resistor R194;
the pin 42 of the U500 is connected with the output end of the operational amplifier U13 through a resistor R28, and the input end of the operational amplifier U13 is connected with an internal sampling detection port;
the LED also comprises an ADuM5400/SOIC_W chip U3, a pin 3 of the U3 is connected with a pin 72 of a U500, a pin 4 of the U3 is connected with a pin 68 of the U500, a pin 5 of the U3 is connected with a pin 73 of the U500, a pin 14 of the U3 is connected with a pin 5 of a TLV5614IDR chip U10, a pin 13 of the U3 is connected with a pin 4 of the U10, a pin 12 of the U3 is connected with a pin 7 of the U10, a pin 11 of the U3 is connected with a base electrode of an NPN triode Q1, an emitter electrode of the triode Q1 is grounded, and a collector electrode of the triode Q1 is connected with a power supply V5DAC through a light emitting diode D9;
pin 14 of U10 is connected with pin 3 of OPA4350 chip U525, pin 1 of U525 is connected with BNC connector through resistor R53;
the power supply part comprises a TPS767D301 chip U2, a CC6-1205SF-E chip U144 and a CC6-1212DF-E chip U145, wherein the 28 pins of the U2 are respectively connected with one end of a resistor R7 and the 80 pins of a U500 through a resistor R6, and the other end of the resistor R7 is connected with the 22 pins of the U2;
the 1 pin of the U144 is connected with the V24P power end, the 2 pin and the 3 pin of the U144 are connected with the V24N power end, the 7 pin of the U144 is respectively connected with the V5DP_C end, one end of the capacitor C184 and one end of the capacitor C123, the other end of the capacitor C184 is respectively connected with one end R232, the 5 pin of the U144 and the DGND_C end, and the other end of the capacitor C123 is connected with the DGND_C end;
the 1 foot of U145 links to each other with V24P power end, and the 2, 3 feet of U145 link to each other with V24N power end, and the 7 foot of U145 links to each other with V15DP_C end, electric capacity C185 one end, electric capacity C127 one end respectively, and the electric capacity C185 other end links to each other with electric capacity C186 one end, the 5 foot of U145, electric capacity C129 one end, AGND_C end respectively, and the electric capacity C186 other end links to each other with V15DN_C end, resistance R234, the 4 feet of U145, the electric capacity C129 other end respectively.
2. A DSP control system according to claim 1, wherein pin 80 of U500 is connected to the easyndsp_reset terminal through resistor R12; the pin 105 of the U500 is connected with the pin 3 of the OSC chip through a resistor R23, the pin 4 of the OSC chip is respectively connected with one end of a capacitor C36, one end of a capacitor C39 and one end of an inductor L10, the other end of the inductor L10 is connected with the end V3.3DP, and the other end of the capacitor C36 is respectively connected with the other end of the capacitor C39 and the end DGND.
3. The DSP control system of claim 1 further comprising a TL084 chip U522, pin 3 of U522 being connected to the cathode terminal of BAV99/SOT chip D1 through resistor R165, pin 2 of U522 being connected to the anode terminal of D1 through resistor R166, the common terminal of D1 being connected to terminal 21 of U505;
the 2 pin of U522 is connected with the cathode end of BAV99/SOT chip D2 through resistor R169, the anode end of D2 is connected with the 1 pin of U522, the public end of D2 is connected with the 2 pin of LM293 chip U521 through resistor R185, the 3 pin of U521 is connected with one end of resistor R223, one end of capacitor C180, one end of resistor R221 and the regulating end of varistor R222 respectively, one fixed end of varistor R222 is connected with the AGND end, the other end of resistor R223 and the other end of capacitor C180 respectively, the other end of resistor R221 is connected with the REF10V end, and the 1 pin of U521 is connected with the 21 pin of U500;
the REF10V terminal is connected with pin 1 of the LM2904 chip U520, pin 2 of the U520 is connected with pin 1 of the U520, pin 3 of the U520 is connected with pin 6 of the REF102 chip U141, and pin 2 of the U141 is connected with the V15DP terminal.
4. The DSP control system of claim 1 further comprising TLE6250GV33 chip U17, pin 1 of U17 connected to pin 176 of U500, pin 4 of U17 connected to pin 1 of U500 through resistor R47, pin 7 of U17 connected to pin 2 of ACT45B-510-2P chip U12, pin 3 of U12 connected to the CANH terminal; the 6 pin of U17 links to each other with the 1 pin of U12, and the 4 pin of U12 links to each other with the CANL end, and the CANL end links to each other with the CANH end through resistance R50.
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CN107069785A (en) * 2017-05-25 2017-08-18 河南迎基太阳能科技有限公司 A kind of scheduling system

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CN104362632A (en) * 2014-11-12 2015-02-18 天津理工大学 LADRC-based (linear active disturbance rejection control) compensating current control system of three-level active power filer
CN204681332U (en) * 2015-04-08 2015-09-30 上海天懋道生新能源科技有限公司 A kind of PWM drive circuit
CN107069785A (en) * 2017-05-25 2017-08-18 河南迎基太阳能科技有限公司 A kind of scheduling system

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