TW200525856A - Multi-module inverter control system - Google Patents

Abstract

This invention relates to a multi-module converter control system. It is utilized to control at least a converter module for providing the power needed by a load and redundancy and hot-plug reset functions. It comprises at least a voltage controller, a converter module, a logic unit, a redundancy controller, a reset controller, and at least a reset circuit. The voltage controller connects with a load. The logic unit output a voltage error signal and a synchronous signal to the converter modules. The redundancy controller connects with the logic unit for transmitting a control signal to the logic unit in order to drive the voltage control unit(s). The reset controller connects with the decoder and the converter modules for outputting a reset signal to the decoder. The reset circuit connects with the decoder and the converter modules for resetting the inverter modules.

Description

200525856 V. Description of the invention (1) [Technical field to which the invention belongs] A multi-module inverter control system, especially a multi-module inverter control with redundancy (redundancy) and hot plug reset function system. [Previous technology] In recent years, due to the popularization of uninterruptible power system (U P S), the continuity of load power supply is gradually not affected by power outage. However, due to the increasing demand for electricity, the capacity of a single UPS is no longer sufficient, and it limits the expansion of the system. In order to increase the power supply capacity and reliability of the system, parallel operation of UPS or inverters has become an inevitable trend. Such a parallel system, in addition to improving the power supply capacity of the system, has many important features; such as: Redundant Operation, Modul ar Design ^ Current-Sharing Technology Control Scheme), maintainability and size reduction. The operation of a parallel system must meet the following two main conditions, otherwise the system will generate a circulating current and cause the system to burn: (1) Each converter operating in parallel must be based on their power ratings (p〇wer Rat ings) Distribute the load current. (2) The output voltage of each inverter module must be the same frequency and the same phase. In order to satisfy the above-mentioned characteristics and conditions, it is known that the method used in parallel operation of inverters, 'the best effect is the combination of voltage control and current control for parallel operation' is also the most common. The parallel operation mode of voltage and current combined control is: internal loop current control, which is used to improve the transient response of the system, and external loop voltage control, which is used to improve the stability of the system (stabi 丨 丨 ty).

200525856 V. Description of the invention (2) ------- However, in the conventional parallel architecture, each converter module is an independent and complete system f, and the controller is also included in the system. The advantage of this design is that it has the right to organize and has the flexibility to expand capacity. But the cost is high and hot-plugging is not easy. Even with the hot-swap function, the embedded (piug_in) converter module cannot be guaranteed to operate normally, so the entire parallel system may be affected by the normal module. [Summary of the invention] There is a bell here 'The present invention is a multi-module inverter control system, which is used in a parallel system of multi-module inverters to provide a redundancy (Redun dancy) and hot plug reset Multi-module inverter control system with multiple functions. To achieve the above object, the present invention provides a multi-module inverter control system, which is connected to a load and at least one inverter module and uses at least one voltage control unit to be connected to a logic unit, a load, and the inverters. Converter modules, and sends a voltage error signal and a synchronization signal to the parallel converter modules' for the output voltage adjustment and synchronous operation of each parallel converter module. Several control units are connected to the logic unit and send a control signal to the logic unit to drive the voltage control units. At the same time, the voltage control units are divided into a main voltage according to the output of the voltage error signal and the synchronization signal. The control unit and at least one redundant voltage control unit. The redundant electric control units are introduced into the system through the control of the redundant control unit when the main control voltage control unit is abnormal to provide voltage control. —The reset control unit is connected to a decoding circuit and the inverter modules, which can detect abnormality by receiving abnormal signals transmitted by abnormal inverter modules.

200525856 、 Invention description (3) The position of the converter module, and output to the decode ^ signal After decoding, a reset signal is output, and the decoding circuit transfers the difference to the abnormal converter module to the controller. The circuit is installed, and the multi-module converter control system of the present invention is operated synchronously, and the converter modules are operated synchronously, and the wheel, output, and electric reed system can be provided to control the regulation of the parallel output voltage. Same as two = 1 differential signal, used as an output unit to improve the power supply of the system. ^ For at least one redundant voltage control for hot-plugging of parallel converter modules. The parallel system is not caused by the embedded (Plug—, + a reset circuit to ensure malfunction. Ln) abnormality of the converter module.

Based on the above-mentioned design technology, the multi-mode system of the present invention can reduce the design cost of the parallel operation of the converter. [Embodiment] In order to allow your reviewers to further understand the technology, means and effects used by the present invention to achieve the intended purpose, please refer to the following detailed description and drawings of the present invention. The purpose, characteristics, and features should have a deep and specific understanding. However, the drawings are provided for reference and explanation only, and are not intended to limit the present invention. Referring to the first figure 'is a control architecture block diagram of the multi-module inverter control system of the present invention. The control system 1 of the present invention is connected to a load 3 and at least one inverter module 2. The converter modules 2 are composed of a current weighted distribution control circuit (CWDC), a current controller and a power stage. The current weighted distributed control circuit (CWDC)

Page 7 200525856 V. Description of the invention (4) The inductor current to load 3 is generated according to the power rating (P ower Ra ti ng s) of these converter modules 2 and the weighted current is transmitted. To the current controller. After the current controller obtains the weighted current, it is integrated with the inductor current of the converter modules 2 and the voltage error signal VE: of the voltage control unit to generate a current error signal I E to control the output of the power stage. Furthermore, the control system 1 first sends a synchronization signal to the converter modules 2 to make all the parallel converter modules 2 operate synchronously and obtain one of the output voltage Vo of the load 3 and compare the output After the voltage Vo and a reference voltage Vr ef, a voltage error signal VE is generated and transmitted to the power stages of the converter modules 2 to control the output of the power stage. As described above, the power levels of the inverter modules 2 are used to control the pulse width of the sinusoidal pulse width modulation (SPWM) signal according to the current error signal and the voltage error signal, thereby adjusting the output voltage of the load 3, Current to achieve the effect of output voltage regulation. Referring to the second figure, it is a schematic block diagram of a circuit of a multi-module inverter control system according to the present invention. The control system 1 is connected to a load 3 and at least one converter module 2 and includes: a control module 1 2, a logic unit 14, at least a voltage control unit 16, a decoding circuit 18, and at least One reset circuit 1 9. In the above description, the control module 12 is composed of a redundant control unit 12 0 and a reset control unit 12 2. Referring again to the second figure, the redundant control unit 120 is connected to the logic unit 14 and transmits a control signal to the logic unit 14 to drive at least one voltage control unit 16 connected to the logic unit 14 to operate. The voltage control units 16 are connected to the load 3 and the inverter modules 2 and receive redundant control.

200525856 V. Description of the invention (5) One of the sine pulse width modulation (SPWM) signals transmitted by the unit 120 is used to generate the reference voltage Vref and to obtain the output of load 3 belonging to y. The voltage control unit 16 compares the reference voltage Vref with the output voltage v0 at the same time, and then generates a voltage error signal VE and transmits it to the inverter modules 2 to control the output of the power stage of the inverter modules 2 In order to reach the load 3 output stable magic effect. At the same time, the synchronous operation of the converter modules 2 connected in parallel through the transmission of the synchronization signal will not cause the circulating current to cause the system to burn. Referring again to the second figure, the redundant operation mode of the control system 1 is as follows: When the normal operation of the control system 1 is started, the voltage control units 6 and 6 are output in accordance with the sequence of the voltage error signal VE and the synchronization signal.

Two electric units and at least one redundant voltage control unit. In the above description, on the starting date Γ ′, the voltage mis-suppression unit 16 is firstly controlled by the main control voltage. One, and the voltage control unit 16 of the synchronization signal is a redundant voltage; early, the rest of these voltages The control single main control voltage control unit negatively adds # 'control and synchronous operation, which will send out the voltage conversion signals of the voltage control unit 2 of the converter module 2 and the voltage error signal v E to And these converter modules use internal: two for power transmission: electricity, compensation. In addition, the current error signal IE is output. After the 3 induction motor, the wheel

The power of these converter modules 2 can be used to control the voltage error signal VE, which is used to control the pulse width of the current error signal according to the current error signal, and then adjust the effect of the load 3 output. Tuen! Current to achieve stable output

200525856 V. Description of the invention (6) As mentioned above, the main control voltage control unit will send a synchronous signal of 60HZ to the redundant voltage control units at any time to synchronize with it. In addition, the serial communication method is used to send messages to each other. To see if each other is normal. When an abnormality occurs, the redundant control unit 120 sends a control signal to the logic unit 14 and drives the voltage control units 16 by the logic unit 14 for replacement and change of the main control voltage control unit to It can protect the system when it is abnormal, and improve the reliability of system work. Please refer to the second figure again. The reset control unit 1 2 2 is connected to a decoding circuit 18 and the inverter modules 2, and is used to detect the inverter modules respectively by using a scanning method. Group 2 is used to receive the operation situation when the converter module 2 is embedded in parallel (P 1 ug-i η) system. When an abnormal action occurs in the converter module 2 embedded in (P 1 ug-i η), the module sends an abnormal signal to the reset control unit 1 2 2 and the reset control unit 1 2 2 receives the abnormality. A decoded signal is output to the decoding circuit 18 after the signal, and a reset signal is output after decoding to drive at least one reset circuit 19 connected to the decoding circuit 18. The reset circuits 19 are relatively connected to the inverter modules 2 and are used to reset the abnormal inverter module 2 after receiving the reset signal, so as to ensure that the parallel system does not cause embedding (Plug -in) Malfunction due to abnormality of inverter module 2. Please refer to the third figure, which is a schematic diagram of the redundant voltage control circuit of the multi-module inverter control system of the present invention. Among them, two sets of voltage control units 16 are used for explanation. As shown in the third figure, the redundant control unit 120 series includes at least a DSP-1 control chip and a DSP-2 control chip, which are connected separately.

Page 10 200525856 V. Description of the invention (7) A first voltage control unit 161 and a second series unit 14 are composed of two sets of Nand circuits, which input X points and γ points early and are connected respectively. To transistor Q3 ,. The knife is assumed to be the j (Hi) of the DSP and j control chips at the start of the system, and the 1/0 of the DSP-2 control chip is in your dynasty. The output is X through the inverse (NAND) circuit. Points are low% ', VJ), 丄 ί 别 (Hi). Therefore, the inspection system of the present invention is based on the first voltage :! The bit pressure and the difference signal ^ are sent to the inverter module 2 Π voltage control units. The second electric power ^ is a short circuit of the main number Q4, which is a redundant voltage and voltage error. Redundancy: Λ voltage, the control elements send messages to each other through serial communication,-:: =: yuan cannot receive the main control When the voltage control unit sends "", the main control voltage control unit will be disconnected, and at this time, the step ^ will

The point is the south potential (Hi), and the point γ is the low potential (after the circuit, X VE is generated by the redundant voltage control unit, the main > differential signal circuit '"will not affect the whole and the signal. The special diode is used as a protection to avoid: = * commutation of the signal of the ^^ group to cause damage to the backflow. Heterogeneous electrical reference road test-the first road four-Tuli ,: 'this / Ming multi-module The reset circuit of the inverter control system is not illustrated. Among them, the 'reset circuit i 9 is connected to the power switch 8 and the converter module 2' is composed of at least _ Rc circuit and at least one electrolytic crystal horse. At the same time, the reset circuit 丨 9 is designed in Tuojie's mind and its body, and its 200525856 five 'invention description (8) ----, --- is embedded in abnormal action (P 丨 媪 action. G) Reset the sigma σσ blade. Refer to the fourth figure. The principle of the selection of the reset circuit 19 and the operation principle of I when the I is as follows: First, the number of 适 is about lms, and the ruler is 1Γ1 $. The gate plate is about 10ms. At the time of R3Cl, the number of bands between 1C1 and R is equal to the number of π gate cranes and the force is about ls. Let ’s take R3 > Mori no. 7 ν. When the converter mode%? 1: The reset signal from the 18th round of the full pen circuit is low potential, 2 ,, and 2 are hanging ☆ Jima C 1 short circuit is not charged, so the battery Due to the moment of starting, the body is stopped (of0, so that C2 is charged, Q 〇η), but the transistor 踗 踗 踗 踗--so that the RST signal is high (Hi), the reset circuit 19 has no effect. C1 start bit C reset code circuit 18 rounds ψ &# 1 after 1% packet Q1 ends (0ff). However, because the reset reset of the rotation round is low (Lo), Ganli does not move: 0. RSm number Still maintain high potential (Η〇, reset power: 19 is high potential Yi) group lfi =, the reset signal of the decoding circuit 18 turns off: off), om'sr, & after the day's time will cause Q1 The cutoff becomes low power, 〇, η, at this time C2 is discharged through Q2, so the RST signal is made. 〇, the abnormal inverter module 2 generates a reset voltage, +,.,. The X series uses the addition of redundancy (Redundancy) to the entire parallel unit, to avoid the crash of the n-connection system due to the failure of the main control voltage control unit. The proposed ', in order to be able to adjust flexibly at any time. Capacity of the joint system, the present invention is hot-swappable architecture associated with the movable teach hot-swap (Hotswap) function. During as' in order to ensure embedding (P Shu Ug- i n) of the inverter module 2

Page 12 200525856 V. Description of the invention (9) Normal operation. The present invention provides a reset circuit as a reset when the plug-in converter module 2 operates abnormally (Res et. ) Action, so as to ensure the safety of the hot-swap action and improve the reliability of the system.

Page 13 200525856 Brief description of the drawings (1) The first diagram is a block diagram of the control structure of the multi-module inverter control system of the present invention; the second diagram is a block diagram of the circuit of the multi-module inverter control system of the present invention The third diagram is a schematic diagram of the redundant voltage control circuit of the multi-module inverter control system of the present invention; and the fourth diagram is a schematic diagram of the reset circuit of the multi-module inverter control system of the present invention. (2) Description of drawing number 1 control system 1 2 control module 1 2 0 redundant control unit 1 2 2 reset control unit 1 4 logic unit 1 6 voltage control unit 161 first voltage control unit 16 2 second voltage control unit 1 8 decoding circuit 1 9 reset circuit 2 converter module 3 load Q, Q2, Q3, Q4 transistor DSP-1, DSP-2 control chip

Page 14 200525856 Schematic description of VE voltage error signal

Page 15

Claims (1)

200525856 6. Scope of patent application —_____ 1. A multi-module inverter control system connected to the small—group and a load, including:, ^ —converter module-one control module, connected to these Converter module, digital signal; ,,, u processing and calculating a logic unit connected to the control module for logical operation; at least one voltage control unit of the digital signal is connected to the logic unit and the converters The module is to output a voltage remote load and signal to the converter modules; δ 遽 and—synchronize a decoding circuit, connected to the control module, and to a 21 reset circuit, connected to the decoding circuit And inverter module. 〃 Don't connect these 2 · Π ϊ The multi-module converter control described in item 1 of the scope of the [/, the control module includes: industrial system, more than a few control units, connected to 蛭σ〇_ ^ signal to the logic unit, use two drives == snow, transmit a control and drive the voltage control units with w; a reset control unit slave group, which receives a 1 ^ "decoding circuit and The converter modules 3. If the patent application is issued, the decode signal. Among these voltage control units, the module converter control system, the output r of the step signal is based on the voltage error signal and the same Voltage control unit. Voltage control unit and at least one redundancy. Multi-module inverter control system as described in item 1 of the scope of patent application 200525856 6. Scope of patent application The logic unit is used as inverse (NAND) logic operation. 5. The multi-module inverter control system according to item 1 of the scope of patent application, wherein the reset circuits are composed of at least one RC circuit and at least one transistor. 6. The multi-module inverter control system as described in item 1 of the scope of the patent application, wherein the reset circuits are respectively connected to the inverter modules and are based on a reset signal transmitted by the decoding circuit. Used for resetting the converter modules. 7. The multi-module converter control system as described in item 1 of the scope of patent application, wherein the converter modules are composed of a current weighted distribution control circuit, a current controller, and a power stage. 8. A multi-module inverter control system connected to at least one inverter module and a load, including: at least one voltage control unit connected to the load, the inverter modules and a The logic unit outputs a voltage error signal and a synchronization signal to the inverter modules; a redundant control unit connected to the logic unit transmits a control signal to the logic unit to drive the voltages A control unit; a reset control unit, connected to a decoding circuit and the converter modules, receiving an abnormal signal and outputting a decoding signal to the decoding circuit; at least one reset circuit connected to the decoding circuit and The converter modules are sent according to a reset signal sent by the decoding circuit for resetting the converter modules. Page 17 200525856 6. Scope of patent application 9. The multi-module inverter control system as described in item 8 of the scope of patent application, wherein the voltage control units are based on the voltage error signal and the output of the synchronization signal. It has a main control voltage control unit and at least one redundant voltage control unit. 10. The multi-module inverter control system as described in item 8 of the scope of the patent application, wherein the logic unit is used as a NAND logic operation. 1 1. The multi-module inverter control system according to item 8 of the scope of patent application, wherein the reset circuits are composed of at least one RC circuit and at least one transistor. 12. The multi-module converter control system according to item 8 of the scope of patent application, wherein the converter modules are composed of a current weighted distribution control circuit, a current controller, and a power stage.