CN201018295Y - Multi-system modular UPS - Google Patents

Abstract

The utility model relates to a multi-standard modular UPS, comprising a display control module, at least one UPS single power module and a centralized bypass control module, wherein the modules are independently arranged in a drawer-type rack and installed in a layer frame; wherein a standard selection part is provided in the UPS single power module, and a required mode is set by a user, and the corresponding output voltage, output phase and output frequency are controlled by an internal program of a central processing unit, and finally an inverter drive signal is output, and sinusoidal alternating current is output after being inverted by a three-level inverter; when the user load needs to increase, it is only necessary to increase the single power module in stages according to the power planning, so as to have more flexible maneuverability and better reliability, and the utility model can be structured into four power supply systems of 3/3 (three-phase input and three-phase output), 1/1, 3/1 and 1/3, and the output frequency can be set to 50Hz or 60Hz, and the output voltage is 220V, 230V and 240V, so as to meet different needs; and the appearance of the whole machine is a layered structure, and the volume is small, so as to be easy to move, transport and place.

Description

Multi-standard modular UPS

technical field

The utility model relates to a UPS (uninterruptible power supply), in particular to a multi-system modularized UPS.

Background technique

The general UPS is a complete machine. When using it, you need to choose UPS power supplies with different powers according to the user's load and input and output power parameters. When the UPS is damaged, it needs to be transferred to the maintenance bypass power supply, so that the load power supply during maintenance is reliable. Performance cannot be guaranteed, and it will be very inconvenient for users to expand the UPS capacity in the future.

Modular UPS itself is a UPS, which contains multiple "module" groups, each module works in parallel, and the number of modules that can be inserted or inserted at will is related to the power. A module includes a rectifier, an inverter, ancillary control circuits, a CPU main control board, and the like. Compared with traditional UPS, its biggest advantage is that it can improve the reliability and availability of the system, because the failure of one module does not affect the normal operation of other modules, and the hot-swappable feature can greatly shorten the installation and repair time of the system. In addition, modular UPS can bring better scalability to users, which also plays a good role in protecting users' investment.

From a technical point of view, modular UPS is already very mature, but from the perspective of user use, one model cannot meet the power supply needs of all users. Different users have different requirements for power supply, such as: input voltage, input frequency, output voltage, output frequency, number of input phases, number of output phases, etc. Therefore, in order to meet the different power supply needs of users, different products must be available to meet different customer requirements, which brings a lot of inconvenience to UPS production and user selection of models.

Utility model content

The purpose of this utility model is to provide a modularization, high efficiency, small size, compact structure, which can meet the requirements of different input and output voltages, output and output frequencies, input and output phase numbers and other electrical parameters, and allows users to A multi-standard modular UPS that can be effectively matched according to needs and budgets.

The technical scheme of the utility model is as follows:

A multi-standard modularized UPS, including a display control module, at least one UPS single power module and a centralized bypass control module, the modules are independently arranged in a drawer-type rack and installed in a layered frame;

The UPS single power module includes a PFC rectification part, an inverter part and a control part; wherein the PFC rectification part is composed of a PFC rectification and battery charging control part, a control detection part and a PFC rectification part power circuit; the PFC rectification and battery The charging control part accepts the control of the DSP processor of the control module, and is used to complete the power factor correction of the mains input and the charging function of the storage battery; the control detection part detects the input voltage of the mains, the battery voltage, the input current of the mains, etc. The detected amount is sent to the control module DSP processor to control it to complete the judgment of the input voltage, the control of the battery charging voltage, the detection of the total input power and other functions; After DC/DC conversion, various power supplies required for the control and detection part are generated;

The inverter part includes an inverter protection part, a three-level inverter, a local current detection part and a power supply circuit; wherein, the inverter protection part detects the overcurrent signal of the three-level inverter to realize three The short-circuit protection of the level inverter detects the temperature of the power tube in the three-level inverter to realize the overheat protection of the power tube; the three-level inverter amplifies the driving signal sent by the DSP processor of the control module to complete the DC to AC conversion. The conversion function of the local inverter; the local current detection part detects the local output current of the three-level inverter, and sends it to the DSP processor of the control module after level conversion and filtering processing to complete the local output current of the three-level inverter. Detection function: the power supply circuit converts the AC input voltage to AC/DC to generate the power supply required for controlling the detection part and the UPS module control part.

The UPS module control part includes a control part power supply circuit, a system selection part, a central processing unit, an output voltage and current detection part, a data communication part, an average current detection part and a control bus between UPS single power modules; wherein, the control part power supply The circuit performs secondary DC/DC conversion on the low voltage after DC/DC conversion to form the high-precision power supply required by each DSP processor part and each detection module part; the standard selection part completes single-phase output, three-phase output, and output frequency , output voltage and other working modes; the output voltage and current detection part detects the inverter output voltage and current to calculate the output power of the module, and the control module stabilizes the output voltage; the DSP processor of the control module is the UPS single power module. The core part is used for the control between the PFC rectification part, the inverter part, and each UPS single power module, and its peripheral circuit is the minimum system for the DSP processor to work; the data communication part is used to complete the UPS single power module and display control module The data communication between the display control module and the UPS single power module is achieved; the average current detection part is used to complete the calculation of the average current from the current sharing control bus, which is sent to the control module DSP to complete the averaging Flow control; the control bus between UPS single power modules is composed of lines and levels, and is used to complete the synchronous detection of the status signals of each module.

The display control module includes a power supply circuit, a display device, an instruction input device, a central processing unit and a data communication part; wherein the power supply circuit supplies power to each part of the display control module; the display device is used to complete the main status of the UPS from the central processing unit Indication of signals and centralized display of real-time data of each module; the instruction input device is used to complete the input of user operation instructions, and after being processed by the central processor, it realizes the control and communication with the UPS single power module and the centralized bypass control module ;The central processing unit is the core part of the whole module, which is completed by the DSP processor, and is used for centralized management of all logic judgments and operations of the display control module, and completes data exchange and control with each UPS single-power module and centralized bypass; the data communication part It is used to complete the data communication between the display control module, the UPS single power module and the centralized bypass control module, and realize the data transmission between the modules.

The centralized bypass module includes: a bypass input detection part, an inverter output detection part, a bypass/inverter switching control part, a data communication part, a central processor and a control bus between modules; wherein the bypass input detection part It is used to detect the bypass input voltage to judge whether the bypass is good or bad. The detected bypass voltage is sent to the display control module through the data communication part for display of the bypass voltage; the inverter output detection part is used to detect the UPS single power module Output the voltage of the busbar to complete the judgment of normal and abnormal inverter; the bypass/inverter switching control part is used to complete the conversion function between UPS inverter to bypass and bypass to inverter; the data communication part is used to complete the centralized The communication and data exchange between the bypass control module and the display control module; the control bus between the modules is mainly composed of lines and levels, and completes the synchronous detection of the status signals of each module and the centralized bypass.

The utility model is a multi-standard modular UPS power supply, which is mainly composed of a centralized bypass control module and one or more UPS single-power modules with a rated capacity of 10KW, and can be expanded at will in the form of hot plugging. When users estimate UPS capacity, they usually underestimate or overestimate. The utility model allows users to carry out construction and investment in stages when the future development direction is not yet clear. When the user load needs to increase, it only needs to increase the power module in stages according to the power planning, which has more flexible mobility and better reliability. The utility model can be constructed into 3/3 (three phases in and three phases out), 1/1, 3/1, 1/3 four power supply systems, and the output frequency can be set to 50Hz or 60Hz, and the output voltage is 220V, 230V , 240V can meet different needs; all UPS single power modules share the built-in battery pack, and can also be installed in a battery redundant structure; output/input terminals have power balance distribution processing; and the appearance of the whole machine is a layered structure, small in size, convenient Move, transport and place. The most prominent advantage of the utility model is that it can realize a combination of various working systems, and can realize multiple working modes such as three-in and three-out, three-in and one-out, and one-in and three-out, which is convenient for users to choose.

Description of drawings

Fig. 1 is a system composition block diagram of the present utility model;

Fig. 2 is a perspective view of the utility model.

Detailed ways

As shown in Figures 1 and 2, a multi-standard modular UPS of the present invention includes a display control module 1, a UPS single power module 2, a centralized bypass control module 3 and a storage battery (not shown in the figure), and the modules are respectively Independently set in the drawer frame 4 and installed in the layer frame 5;

The display control module 1 includes a power supply circuit 11 , a display device 12 , an instruction input device 13 , a central processing unit 14 and a data communication part 15 .

Wherein, the commercial power is input to the power supply circuit 11 through filtering, AC/DC conversion and battery through DC/DC conversion, and is used to supply power to various parts of the display control module 1;

Display device 12: used to complete the indication of the relevant UPS main status signals from the central processing unit 14 and the centralized display of the real-time data of each module, which can be an LCD/LED display;

Instruction input device 13: used to complete the input of user operation instructions and send them to the central processing unit 14 to achieve the purpose of controlling the UPS, and then realize the communication with the UPS single power module 2 and the centralized bypass control module 3. The instruction input device 13 can be a keyboard or a touch screen;

Central processing unit 14: is the core part of the whole module, completed by the DSP processor, used for centralized management of all logic judgments and operations of the display control module 1, and completes data exchange and control with each UPS single power module 2 and centralized bypass;

Data communication part 15: used to complete the data communication between the display control module 1, the UPS single power module 2 and the centralized bypass control module 3, and realize the data transfer between the modules.

The UPS single power module 2 includes a PFC rectification part 21 , an inverter part 22 and a control part 23 .

The PFC rectification part 21 is composed of a mains input slow start module 212 and a battery input slow start module 211 , a PFC rectification and battery charging control part 213 , a control detection part 214 and a PFC rectification module power circuit 215 .

Among them, the mains input slow start module 212: located at the mains input end of the UPS single power module 2, is used to precharge the large impact current generated by the mains on the filter capacitor at the moment of switching on, so as to prevent damage to the connectors and rectifiers ;

Battery input slow start module 211: located at the battery input terminal of UPS single power module 2, used to precharge the large impact current generated by the battery on the capacitor at the moment of switching on, so as to prevent damage to the connector;

PFC rectification and battery charging control part 213: accepts the control of the control module DSP processor 235, and is used to complete the power factor correction of the mains input and the battery charging function;

Control detection part 214: used to detect the input voltage of mains power, input current of mains power, battery voltage, etc. after power factor correction, and send it to the control module DSP processor 235 to control it, so as to complete the judgment of the input voltage level , battery charging voltage control, input total power detection and other functions;

PFC rectification module power supply circuit 215: After the mains power is converted by DC/DC, various power supplies required for control are generated;

The inverter part 22 includes an inverter protection part 221 , a three-level inverter 222 , a local current detection part 223 , an isolation drive part 224 and an inverter part power circuit 225 .

Among them, the inverter protection part 221: accepts the control of the control module DSP processor 235, and is used to detect the overcurrent signal of the three-level inverter 222, realize the short-circuit protection of the three-level inverter 222, and detect the three-level inverter The temperature of the power tube in the transformer 222 realizes the overheating protection of the power tube;

Three-level inverter 222: also known as a three-phase inverter, used to amplify the driving signal sent by the DSP processor 235 of the control module to complete the conversion function from DC to AC;

Local current detection part 223: used to detect the local output current of the three-level inverter 222, and send it to the control module DSP processor 235 after level conversion and filtering processing to complete the three-level inverter 222 local Output current detection function;

Isolation driving part 224: used to drive the power tube in the three-level inverter 222 after performing level conversion and electrical isolation on the three-phase inverter driving signal sent by the control module DSP processor 235 to achieve three-phase inverter Function;

Power supply circuit 225 for the inverter part: used to convert the AC input voltage to AC/DC to generate various power supplies required by the control detection part and the UPS single power module control part.

The control part 23 includes a control part power supply circuit 231, a module communication address selection part 232, a system selection part 233, a module status display 234, a control module DSP processor 235 and its peripheral circuit 236, and an inverter drive level conversion part 237 , the inverter output voltage and current detection part 238, the data communication part 239, the average current detection part 240 and the control bus 241 between the UPS single power modules.

Among them, the power supply circuit 231 of the control part: convert the low voltage of the mains power through DC/DC conversion to a second DC/DC conversion to form the high-precision power supply required by the control module DSP processor 235 and various detection modules.

Module communication address selection part 232: complete the setting of the communication address between the UPS single power module 2 and the display control part 1;

Standard selection part 233: first set the required mode by the user, decode and analyze the parameters to be controlled by the control module DSP processor 235, and finally control the corresponding output voltage, output phase and output frequency by the internal program of the control module DSP processor 235 , and finally output the inverter driving signal, and then output the sine wave AC after being inverted by the three-level inverter 222; During electrical initialization, initialize the corresponding data according to the user's requirements, output the input and output parameters required by the user, and complete the selection function of various working systems;

Module state display 234: the light emitting mode of the LED light emitting diode indicates different working states of the UPS single power module 2 .

Control module DSP processor 235 and its peripheral circuit 236: mainly complete the control of each part of the whole machine, and its peripheral circuit is the minimum system for the control module DSP processor 235 to work;

Inverter drive level conversion part 237: convert the 3.3V tiny signal sent by the control module DSP processor 235 into the +15V power signal required by the power tube in the three-level inverter 222;

Inverter output voltage and current detection part 238: After the output voltage and output current of the three-level inverter 222 are processed by level conversion filtering, they are sent to the control module DSP processor 235 to complete output voltage feedback and current sharing control;

Data communication part 239: used to complete the data communication and data exchange between the UPS single power module 2 and the display control module 1;

The average current detection part 240: used to complete the calculation of the average current, and send it to the control module DSP processor 235 to complete the current equalization control after being processed by level conversion and filtering;

The control bus 241 between UPS single power modules: mainly composed of lines and levels, and completes the synchronous detection of the status signals of each UPS single power module 2.

The centralized bypass control module 3 includes a bypass input detection part 31, an inverter output detection part 32, a bypass/inversion switching control part 33, a centralized bypass control module DSP processor 34, a data communication part 35 and a UPS Control bus 36 between single power modules.

Wherein the bypass input detection module 31: used to detect the bypass input voltage, to achieve the judgment of whether the bypass is good or bad, the detected bypass voltage is sent to the display control module 1 through the data communication part 35, and the display of the bypass voltage is provided;

The inverter output detection part 32: used to detect the voltage of the output bus of the UPS single power module 2, and complete the judgment of whether the inverter is normal or abnormal;

Bypass/inverter switching control part 33: complete the conversion function between UPS inverter to bypass and bypass to inverter;

Data communication part 35: complete the communication and data exchange between the centralized bypass control module 3 and the display control module 1 .

The control bus 36 between UPS single power modules: mainly composed of lines and levels, completes the synchronous detection of the state signals of each UPS single power module and the centralized bypass.

Describe the working principle of the utility model in three kinds of working modes below;

Mains working state; the AC input voltage is sent to the UPS single power module 2 from the "input voltage parallel busbar", wherein the PFC rectification part 21 detects that the mains input voltage is normal, then the PFC rectification part power circuit 215 works to generate UPS single power The required power supply of the module control part 23; the UPS single power module control part 23 starts to reset after the power supply, and the control module DSP processor 235 executes the program real initialization operation. After the charging control part 213 detects the command sent by the control module DSP processor 235, it starts to work and generates +432V, -432V DC voltage signals, which are sent to the three-level inverter 222 of the inverter part 22 through the No. 4 bus to provide DC power. able. The PFC rectification part 21 charges the batteries connected in parallel to the positive and negative DC buses while generating +432V and -432V DC voltages.

After the PFC rectification work is completed, the control module DSP processor 235 just sends the required inverter drive signal of the three-level inverter 222, and at this moment the three-level inverter 222 outputs three-phase or single-phase AC voltage (output voltage The phase depends on the selection signal provided by the system selection part 233) to the output voltage parallel bus to work in parallel with other modules. The inverter voltage and current detection part 238 of the UPS single power module control part 23 detects the output voltage of the inverter 222 and sends it to the control module DSP processor 235 for feedback regulation to achieve the purpose of stabilizing the output voltage. The average current detection part 240 detects the average current of all modules, and sends it to the control module DSP processor 235 to make the output current of each module consistent, so as to achieve the purpose of parallel current sharing.

The AC voltage of the output voltage parallel bus is sent to the inverter input terminal of the centralized bypass control module 3, and then sent to the UPS output after passing through the bypass/inverter switching control part 33 to provide power for the load. When the output is single-phase, The three-phase live wires of the UPS output need to be short-circuited.

Battery working state: when the AC input power fails, the PFC rectifier part 21 stops working. At this time, since the battery is connected in parallel to the positive and negative DC bus bars, the three-level inverter 221 circuit always has DC voltage and continues to convert it into AC voltage. , since the power supply circuit 215 of the PFC rectification part cannot provide power to the UPS single power module control part 23 after the mains power failure, at this time, the UPS single power module control part 23 provides electric energy to the UPS single power module control part 23 by the inverter board power supply . The work of the UPS single power module control part 23 will not be affected by power failure.

The other conditions are the same as the normal conditions of the mains, the AC voltage generated by the inverter 222 is sent to the output voltage parallel bus, and then sent to the inverter input terminal of the centralized bypass control module 3, and then passed through the bypass/inverter switching control part 33 Then it is sent to UPS output to provide power for the load. When the output is single-phase, the three-phase live wires of the UPS output need to be short-circuited.

When the UPS is damaged, such as UPS overload or other fatal failures, the UPS single power module 2 sends out a fault signal, which is sent to each module through the control bus 241 between the modules to achieve the purpose of synchronous switching, and the centralized bypass detects the fault signal. Immediately turn on the bypass power supply and send it to the output through the input voltage parallel bus and the bypass/inversion switching control part 33, so as to achieve the purpose of bypass output. This process can be switched quickly at the uS level, so the output is uninterrupted when switching the bypass power supply.

The display control module 1 is used to display the status and operating parameters of the whole machine. After the user's operation of the whole machine is also completed through the display control module 1, the operating status and real-time parameters of the UPS single power module 2 and the centralized bypass control module 3 , transmitted to the display control module 1 through its data communication part 239, the data communication part 239 adopts the SPI communication mode, and the differential transmission mode is adopted in the signal transmission part, which can improve the anti-interference ability of communication.

Claims (3)

1. multi-mode modular UPS power supply is characterized in that: comprise display control module, the single power model of at least one UPS and concentrated bypass control module, described module independently is arranged in the drawer type frame respectively and is installed in the laminar framework;

The single power model of described UPS comprises PFC rectifying part, inversion part and control section; Wherein the PFC rectifying part is made up of PFC rectification and battery charge control section, control detection part and PFC rectifying part power circuit; Described PFC rectification and battery charge control section are accepted the control of control module dsp processor in the control section; Described control detection partly detects detection limits such as mains input voltage, cell voltage, civil power input current, and the control module dsp processor of sending into control section is controlled it; Described PFC rectifying part power circuit produces the required various power supply of control detection part with civil power after the DC/DC conversion;

Described inversion partly comprises inverter protection part, three-level inverter, this electromechanics stream test section and power circuit; Wherein, inverter protection part detects the temperature of power tube in the over-current signal, three-level inverter of three-level inverter; Three-level inverter amplifies the drive signal that the control module dsp processor is sent into; This machine output current of three-level inverter is detected in this electromechanics stream test section, sends into the control module dsp processor after level conversion and Filtering Processing; Power circuit produces control detection part and the required power supply of UPS module controls part with AC-input voltage after the AC/DC conversion;

Described UPS module controls partly comprises between control section power circuit, standard selection part, control module dsp processor, inverter output voltage current detecting part, data communication part, average current detection part and the single power model of UPS controls bus; Wherein, the low-voltage of control section power circuit after with the DC/DC conversion carried out secondary DC/DC conversion, and control module dsp processor and each detection module part are given in power supply; The standard selection portion is divided the mode data that receives user's setting, through control module dsp processor control respective output voltages, output phase, output frequency, and output inversion drive signal, sine wave output alternating current after the three-level inverter inversion; Inverter output voltage current detecting part after the level conversion Filtering Processing, is sent into the control module dsp processor with the output voltage of three-level inverter, output current; Control module dsp processor control PFC rectifying part, inversion part and the single power model of each UPS; The data communication and the exchanges data of single power model of UPS and display control module partly finished in data communication; Average current detection part is sent into the control module dsp processor after the electric current of sharing control bus is carried out the level conversion Filtering Processing; The control bus is made of the status signal of each module of synchronous detecting between the single power model of UPS line and level.

2. a kind of multi-mode modular UPS power supply according to claim 1 is characterized in that: described display control module comprises power circuit, display unit, instruction inputting device, central processing unit and data communication part; Wherein power circuit is given the power supply of display control module each several part; The display unit centralized displaying is from the index signal of the main state of relevant UPS of central processing unit and the real time data of each module; Instruction inputting device receives the operational order of user's input, after central processing unit is handled, realize with UPS list power model and concentrated bypass control module between control with communicate by letter; Central processing unit is finished by dsp processor, and exchanges data and control with single power model of each UPS and concentrated bypass are finished in centralized management all logic determines of display control module and operation; Data communication is partly controlled display control module and the single power model of UPS, is concentrated data communication and data passes between the bypass control module.

3. a kind of multi-mode modular UPS power supply according to claim 1 is characterized in that: described concentrated bypass module comprises: control bus between bypass input test section, inversion output test section, bypass/inversion switching control part, data communication part, central processing unit and the module; Wherein the bypass input voltage is detected in bypass input test section, judges the good, bad of bypass, and the bypass voltage after the detection is distributed to display control module through data communication section and shows for bypass voltage; The voltage of the single power model output of UPS bus is detected in inversion output test section; Bypass/inversion switching control part finish the UPS inversion to bypass, switch to the conversion between the inversion; Data communication is partly finished and is concentrated communicating by letter and exchanges data of bypass control module and display control module; The control bus mainly is made of the status signal of each module of synchronous detecting and concentrated bypass between the module line and level.

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