CN112366805B - Uninterruptible power supply parallel control equipment, uninterruptible power supply parallel control method and inverter power supply system - Google Patents
Uninterruptible power supply parallel control equipment, uninterruptible power supply parallel control method and inverter power supply system Download PDFInfo
- Publication number
- CN112366805B CN112366805B CN202011083677.8A CN202011083677A CN112366805B CN 112366805 B CN112366805 B CN 112366805B CN 202011083677 A CN202011083677 A CN 202011083677A CN 112366805 B CN112366805 B CN 112366805B
- Authority
- CN
- China
- Prior art keywords
- power supply
- parallel
- uninterruptible power
- power supplies
- parameters
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
Abstract
The invention relates to uninterruptible power supply parallel control equipment, a method and an inverter power supply system. The detection module is used for detecting whether the power supply parameters of the parallel uninterrupted power supplies are synchronous or not and whether the loads are current-sharing or not; the control module is used for generating control signals according to the detection result of the detection module and the power supply parameters of the uninterruptible power supplies connected in parallel, and controlling the uninterruptible power supplies according to the control signals so as to synchronize the power supply parameters of the uninterruptible power supplies connected in parallel and equalize loads. The uninterrupted power supply parallel control equipment has strong practicability and reliability.
Description
Technical Field
The invention relates to the technical field of power supply control, in particular to an uninterruptible power supply parallel control device, an uninterruptible power supply parallel control method and an inverter power supply system.
Background
With the development of modern high technology, a great deal of electric equipment such as computers and high-precision instruments are used, so that the electric equipment has higher and higher requirements on a power grid, and the interference of high-order harmonics, instantaneous power failure and high-energy surge are unacceptable. Modern electric equipment has raised requirements on power supply reliability and power supply quality, so that high-performance uninterruptible power supplies are widely applied. However, with the improvement of power supply capacity and power supply reliability, a single uninterruptible power supply cannot meet the requirements of a large number of electric devices, and a plurality of uninterruptible power supplies need to be connected in parallel to expand the power supply capacity of an uninterruptible power supply system.
In the conventional art, each parallel uninterruptible power supply is controlled by using a centralized controller. However, such a control method is less reliable.
Disclosure of Invention
Based on this, it is necessary to provide an uninterruptible power supply parallel control apparatus, method, and inverter power supply system in view of the above-described technical problems.
In one aspect, an embodiment of the present application provides an uninterruptible power supply parallel control apparatus, where the uninterruptible power supply parallel control apparatus includes a plurality of control devices, each control device is connected to a different uninterruptible power supply, and the control device includes: the device comprises a detection module and a control module;
the detection module is used for detecting whether the power supply parameters of the parallel uninterrupted power supplies are synchronous or not and whether the loads are current-sharing or not;
the control module is used for generating control signals according to the detection result of the detection module and the power supply parameters of the uninterruptible power supplies connected in parallel, and controlling the uninterruptible power supplies according to the control signals so as to synchronize the power supply parameters of the uninterruptible power supplies connected in parallel and equalize loads.
In one embodiment, the detection module includes:
the first detection unit is connected with the control module and used for acquiring power supply parameters of all the parallel uninterruptible power supplies, determining whether the power supply parameters of all the parallel uninterruptible power supplies are synchronous or not based on the power supply parameters, obtaining a first detection result, and sending the first detection result to the control module, wherein the power supply parameters comprise frequency, amplitude and phase of output voltage of all the parallel uninterruptible power supplies;
the second detection unit is connected with the control module and used for acquiring the working state of each parallel uninterrupted power supply, determining whether the loads of each parallel uninterrupted power supply are current-sharing or not based on the working state, obtaining a second detection result, and sending the second detection result to the control module, wherein the working state comprises the running state of each parallel uninterrupted power supply, the total output current and the load current of each uninterrupted power supply.
In one embodiment, the detection module further includes:
the third detection unit is connected with the second detection unit and is used for detecting the states of the switches of the uninterruptible power supplies in parallel to obtain a third detection result, and the third detection result is sent to the second detection unit, so that the second detection unit determines the number of the uninterruptible power supplies in parallel according to the running states of the uninterruptible power supplies in parallel and the third detection result.
In one embodiment, the control module includes:
the signal generating unit is connected with the detection module and used for generating a control signal according to the detection result and the power supply parameters of the uninterruptible power supplies connected in parallel;
the driving unit is connected with the signal generating unit and used for driving the uninterruptible power supplies according to the control signals so as to synchronize the power supply parameters of the uninterruptible power supplies connected in parallel and equalize the loads of the uninterruptible power supplies connected in parallel.
In one embodiment, the control module further comprises:
and the shaping and filtering unit is connected between the signal generating unit and the driving unit and is used for shaping and filtering the control signal.
In another aspect, an embodiment of the present application provides an inverter power system, including:
the uninterruptible power supply parallel control device provided by the embodiment;
and a plurality of parallel uninterruptible power supplies, wherein each uninterruptible power supply is provided with a control device.
In still another aspect, an embodiment of the present application further provides an uninterruptible power supply parallel control method, which is applied to the uninterruptible power supply parallel control device provided in the foregoing embodiment, and the method includes:
detecting whether the power supply parameters of all parallel uninterruptible power supplies are synchronous or not and whether loads are current-sharing or not to obtain a detection result;
generating a control signal according to the detection result and the power supply parameters of each parallel uninterrupted power supply;
and controlling the uninterruptible power supplies based on the control signals so as to synchronize the power supply parameters of the uninterruptible power supplies connected in parallel and equalize loads.
In one embodiment, detecting whether the power supply parameters of each parallel uninterruptible power supply are synchronous and whether the loads are current-sharing includes:
acquiring power supply parameters and working states of all parallel uninterruptible power supplies;
determining whether the power supply parameters of the parallel uninterruptible power supplies are synchronous or not based on the power supply parameters;
and determining whether loads of the parallel uninterruptible power supplies are current-sharing or not based on the working state.
In one embodiment, the method further comprises:
acquiring the state of a switch of each parallel uninterrupted power supply;
and determining the number of the parallel uninterruptible power supplies according to the states of the switches.
In one embodiment, before detecting whether the power supply parameters of the parallel uninterruptible power supplies are synchronous and whether the loads are current-sharing, the method further comprises:
obtaining input parameters of the uninterruptible power supplies connected in parallel;
determining whether each parallel uninterrupted power supply normally operates according to the input parameters;
if yes, executing the step of detecting whether the power supply parameters of the parallel uninterrupted power supplies are synchronous and whether the loads are current-sharing.
The application provides uninterruptible power supply parallel control equipment, an uninterruptible power supply parallel control method and an inverter power supply system. The uninterruptible power supply parallel control equipment comprises a plurality of control devices, wherein each control device is respectively connected with different uninterruptible power supplies. The uninterruptible power supply parallel control equipment provided by the embodiment detects whether the power supply parameters of all parallel uninterruptible power supplies are synchronous or not and whether loads are current-sharing or not through the detection module; the control device generates control signals according to the detection result of the detection module and the power supply parameters of the uninterruptible power supplies connected in parallel, and controls the uninterruptible power supplies according to the control signals so as to synchronize the power supply parameters of the uninterruptible power supplies connected in parallel and equalize loads. By using the uninterruptible power supply parallel control equipment provided by the embodiment, the control device corresponding to each uninterruptible power supply can acquire information such as power supply parameters and load currents of other uninterruptible power supplies, and the uninterruptible power supplies can be dynamically controlled according to the information, so that the power supply parameters of the uninterruptible power supplies in parallel are kept synchronous, and the load is uniform, so that the uninterruptible power supply parallel control equipment has high practicability and reliability.
Drawings
In order to more clearly illustrate the technical solutions of embodiments or conventional techniques of the present application, the drawings that are required to be used in the description of the embodiments or conventional techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for different persons skilled in the art.
Fig. 1 is a schematic structural diagram of an uninterruptible power supply parallel control device according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of an uninterruptible power supply parallel control device according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of an uninterruptible power supply parallel control device according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of an inverter power system according to an embodiment of the present disclosure;
fig. 5 is a schematic step flow diagram of an uninterruptible power supply parallel control method according to an embodiment of the present application;
fig. 6 is a schematic step flow diagram of an uninterruptible power supply parallel control method according to an embodiment of the present application;
fig. 7 is a schematic step flow diagram of an uninterruptible power supply parallel control method according to an embodiment of the present application;
fig. 8 is a schematic step flow diagram of an uninterruptible power supply parallel control method according to an embodiment of the present application.
Reference numerals illustrate:
10. the uninterrupted power supply is connected with the control equipment in parallel; 11. a control device; 20. an uninterruptible power supply; 30. an inverter power supply system; 100. a detection module; 110. a first detection unit; 120. a second detection unit; 130. a third detection unit; 200. a control module; 210. a signal generating unit; 220. a driving unit; 230. and a shaping and filtering unit.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.
The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The terms "coupled" and "connected," as used herein, are intended to encompass both direct and indirect coupling (coupling), unless otherwise indicated. In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or refer to an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
The uninterruptible power supply parallel control equipment can be applied to a scene of using uninterruptible power supplies to control a plurality of uninterruptible power supplies which are connected in parallel.
Referring to fig. 1, an embodiment of the present application provides an uninterruptible power supply parallel control apparatus 10, where the uninterruptible power supply parallel control apparatus 10 includes a plurality of control devices 11, and each control device 11 is connected to a different uninterruptible power supply 20. In other words, one ups 20 corresponds to one control device 11, the control device 11 is used for controlling the ups 20, and the control device 11 may receive information sent by the control device 11 corresponding to the other ups 20, where the information may be related information of the other ups 20. The control device 11 includes a detection module 100 and a control module 200. The detection module 100 and the control module 200 may be connected wirelessly or by wire. The connection mode can be selected by a worker according to the types and structures of the detection module 100 and the control module 200, and the connection mode of the detection module 100 and the control module 200 is not limited in this embodiment, so long as the information transmission between the detection module 100 and the control module 200 can be realized.
The detection module 100 is used for detecting whether the power supply parameters of each parallel ups 20 are synchronous and whether the loads are current-sharing. The power supply parameters may include frequency, amplitude, phase, etc. of the output voltage of the ups 20. The current of the load refers to the current provided by the ups 20 to the load. Each parallel ups 20 refers to a plurality of parallel ups 20 that operate simultaneously. The detection module 100 may detect the power supply parameters of the ups 20 corresponding to the detection module, or may receive the power supply parameters sent by the control device 11 corresponding to the ups 20 connected in parallel, and compare the power supply parameters to obtain a detection result. The detection module 100 compares the corresponding power supply parameters of the ups 20 with the power supply parameters of the other ups 20 connected in parallel to determine whether the power supply parameters of the ups 20 connected in parallel are synchronous. Similarly, the detection module 100 may detect the current provided by the corresponding ups 20, and may also receive the current sent by the control device 11 corresponding to the ups 20 connected in parallel. The detection module 100 compares the current provided by the corresponding ups 20 with the current of the other ups 10 connected in parallel to determine whether the loads of the ups 20 connected in parallel are current-sharing. The detection module 100 may be a voltage and current measurement chip or an oscilloscope. The power supply parameters and the current can be read by a worker through the oscilloscope, the oscilloscope can be connected with the control chip, and the reading of the oscilloscope can be obtained through the control chip. The present embodiment does not limit the kind and structure of the detection module 100, as long as the function thereof can be realized.
The control module 200 is configured to generate a control signal according to the detection result of the detection module 100 and the power supply parameters of each parallel ups 20, and control the ups 20 according to the control signal, so that the power supply parameters of each parallel ups 20 are synchronized, and the loads are equalized. The detection result may be that the power supply parameters of the ups 20 are synchronized and the loads are equalized, or that the power supply parameters of the ups 20 are not synchronized and the loads are equalized. Since the output voltage of the ups 20 is proportional to the current supplied to the load, i.e., the output voltage varies, the current supplied to the load also varies, the detection result may not be that the power supply parameters of the ups 20 are synchronized, the loads are not balanced, or the power supply parameters of the ups 20 are not synchronized, and the loads are balanced. The control signal may be a pulse signal, a spectrum signal, or the like. If the detection result is that the power supply parameters of the ups 20 are synchronous and the load is equalized, the control module 200 may or may not generate an empty control signal. If the detection result is that the power supply parameters of the ups 20 are not synchronized and the load is not equalized, the control module 200 generates a control signal according to the difference between the corresponding power supply parameters of the ups 20 and the power supply parameters of the other ups 20, so as to control the power variation loop in the ups 20 corresponding to the control module 200, so that the power supply parameters of the ups 20 are synchronized with the power supply parameters of the other ups 20 and the load is equalized. Specifically, the control signal may be used to control a switching tube in a power variation loop of the ups 20, and the adjustment of the power supply parameters of the ups 20 is achieved by changing the duty cycle of the switching tube, etc. The control module 200 may be a computer device, a micro-processing chip or other device, wherein the computer device may be, but is not limited to, an industrial computer, a notebook computer, a smart phone, a tablet computer, a portable wearable device, etc. The kind and structure of the control module 200 and the kind of the control signal are not limited in this embodiment, as long as the functions thereof can be realized.
Specifically, it is assumed that there are 3 uninterruptible power supplies and 3 corresponding control devices that are connected in parallel and that are operated simultaneously, namely, uninterruptible power supply a and corresponding control device a, uninterruptible power supply B and corresponding control device B, and uninterruptible power supply C and corresponding control device C. The control device A can send information such as power supply parameters and current of the uninterruptible power supply A to the control device B and the control device C; the control device B may send information such as the power supply parameters and the current of the uninterruptible power supply B to the control device a and the control device C. The detection module A in the control device A can detect whether the power supply parameters of the uninterrupted power supply A, the uninterrupted power supply B and the uninterrupted power supply C are synchronous or not, and whether loads are current-sharing or not. If the obtained detection result is: the uninterruptible power supply A is not synchronous with the power supply parameters of the uninterruptible power supply B and the uninterruptible power supply C, and the loads are not uniform, after receiving the detection result, the control module A in the control device A generates a control signal according to the difference between the power supply parameters of the uninterruptible power supply A and the power supply parameters of the uninterruptible power supply B or the uninterruptible power supply C, and controls a power change loop in the uninterruptible power supply A so that the power supply parameters of the uninterruptible power supply A are synchronous with the power supply parameters of the uninterruptible power supply B and the power supply parameters of the uninterruptible power supply C, and the loads are uniform.
The uninterruptible power supply parallel control device 10 provided in this embodiment detects whether the power supply parameters of each parallel uninterruptible power supply 20 are synchronous and whether the loads are current-sharing through the detection module 100; the control device 200 generates control signals according to the detection result of the detection module 100 and the power supply parameters of the parallel uninterruptible power supplies, and controls the uninterruptible power supplies 20 according to the control signals so as to synchronize the power supply parameters of the parallel uninterruptible power supplies 20 and equalize loads. With the uninterruptible power supply parallel control device 10 provided in this embodiment, the control device 11 corresponding to each uninterruptible power supply 20 can obtain information such as power supply parameters and load currents of other uninterruptible power supplies 20, and can dynamically control the uninterruptible power supplies 20 according to the information, so that the power supply parameters of each uninterruptible power supply 20 in parallel are kept synchronous, and loads are equalized. In addition, when any one uninterruptible power supply in the parallel uninterruptible power supplies 20 is withdrawn or other uninterruptible power supplies are connected, the operation of the whole inverter power supply system is not influenced, and the practicability and the reliability are high.
Referring to fig. 2, in one embodiment, the detection module 100 includes a first detection unit 110 and a second detection unit 120.
The first detection unit 110 is connected to the control module 200, and is configured to obtain power supply parameters of each parallel ups 20, determine whether the power supply parameters of each parallel ups 20 are synchronous based on the power supply parameters, obtain a first detection result, and send the first detection result to the control module 200. The power supply parameters comprise the frequency, the amplitude and the phase of the output voltage of each parallel uninterrupted power supply. The first detecting unit 110 and the control module 200 may be connected wirelessly or by wire, which is not limited in this embodiment. In a specific embodiment, the first detection unit 110 may include an ac voltage detection circuit and a logic determination circuit, and the logic determination circuit and the ac voltage detection circuit are electrically connected. The ac voltage detection circuit can detect the power supply parameters of the ups 20 corresponding to the ac voltage detection circuit, and the logic determination circuit can receive the power supply parameters of the ups 20 corresponding to the ac voltage detection circuit and the power supply parameters of other ups 20 connected in parallel, determine whether the power supply parameters of the ups 20 corresponding to the ac voltage detection circuit are synchronous with the power supply parameters of other ups 20, and output the first detection result. The first detection result may be a level signal, and specifically, if the power supply parameter of the uninterruptible power supply is synchronous with the power supply parameters of other uninterruptible power supplies, the first detection result is 0; if the power supply parameters of the uninterruptible power supply are not synchronous with the power supply parameters of other uninterruptible power supplies, the first detection result is 1. The present embodiment does not impose any limitation on the specific structure of the first detection unit 110 as long as the function thereof can be achieved.
The second detection unit 120 is connected to the control module 200, and is configured to obtain a working state of each parallel ups 20, determine whether loads of each parallel ups 20 are equal in current or not based on the working state, obtain a second detection result, and send the second detection result to the control module 200. The operating states include the operating states of the parallel ups 20, the total output current, and the load current of each ups. The operation state of each of the parallel uninterruptible power supplies 20 refers to a state of whether the uninterruptible power supplies are operated, and the operation state can be judged by detecting whether the uninterruptible power supplies 20 have output currents. If the output current exists in a certain uninterruptible power supply, the uninterruptible power supply is indicated to be a parallel uninterruptible power supply which works simultaneously. The second detecting unit 120 and the control module 200 may be connected by wire or wirelessly, which is not limited in this embodiment. In a specific embodiment, the second detecting unit 120 includes a current detecting circuit and a logic judging circuit, and the logic judging circuit is electrically connected to the current detecting circuit. The current detection circuit may detect the current of the ups 20 corresponding thereto, and the logic determination circuit may receive the current of the ups 20 corresponding thereto and the current of the other ups 20, determine whether the current of the ups 20 corresponding thereto is the same as the current of the other ups 20, and output the second detection result. The second detection result may be a level signal or a pulse signal, which is not limited in this embodiment. The kind of the second detection result may be set according to the structure of the second detection unit 120. The specific structure of the second detecting unit 120 of the present embodiment is not limited at all as long as the function thereof can be achieved.
With continued reference to fig. 2, in one embodiment, the detection module 100 further includes a third detection unit 130.
The third detecting unit 130 is connected to the second detecting unit 120, and is configured to detect a state of a switch of the ups 20, obtain a third detection result, and send the third detection result to the second detecting unit 120, so that the second detecting unit 120 determines the number of parallel ups 20 according to the running state of the ups 20 and the third detection result. Each ups 20 is provided with a switch that can control whether the ups 20 is operating in parallel with other ups 20. The third detecting unit 130 may determine the number of the ups 20 that are simultaneously operating by detecting the state of the switch of the ups 20, and the third detection result is the number of the ups 20 that are simultaneously operating determined according to the state of the switch. The second detecting unit 120 may determine the number of parallel ups 20 that are simultaneously operated according to the operation state of each of the parallel ups 20, and compare the number with the third detection result to determine the number of parallel ups 20 that are simultaneously operated. In a specific embodiment, the third detecting unit 130 may be a position detecting device, and the switch state is determined by detecting the position of the switch of the uninterruptible power supply 20 through the position detecting device. In this embodiment, the second detecting unit 120 may determine whether the number of parallel uninterruptible power supplies 20 that are simultaneously operated is correct when determining whether the loads are current-sharing according to the third detection result detected by the third detecting unit 130, so that the accuracy of determining whether the loads are current-sharing may be improved.
Referring to fig. 3, in one embodiment, the control module 200 includes a signal generating unit 210 and a driving unit 220.
The signal generating unit 210 is connected to the detection module 100, and is configured to generate a control signal according to the detection result and the power supply parameters of each parallel ups 20. In a particular embodiment, the signal generating unit 210 includes a selector and an SPWM signal generator, the selector including an input and first and second outputs. The input end of the selector is connected with the detection module 100, the first output end of the selector is connected with the SPWM signal generator, and the second output end of the selector is grounded. If the detection result is that the power supply parameters of the parallel uninterruptible power supplies 20 are synchronous and the loads are equalized, the power supply parameters of the parallel uninterruptible power supplies 20 are output from the second output end of the selector; if the detection result is that the power supply parameters of the parallel uninterruptible power supplies 20 are not synchronous and the loads are not uniform, the power supply parameters of the parallel uninterruptible power supplies 20 are output to the SPWM signal generator from the first output end of the selector. The SPWM signal generator generates a control signal based on a supply parameter. The present embodiment does not impose any limitation on the specific structure of the signal generating unit 210 as long as the functions thereof can be realized.
The driving unit 220 is connected to the signal generating unit 210, and is configured to drive the ups 20 according to the control signal, so that the power supply parameters of the ups 20 connected in parallel are synchronized, and the loads of the ups 20 connected in parallel are equalized. In a specific embodiment, the driving unit 220 may be a driving circuit that may drive the switching tube in the power variation loop of the uninterruptible power supply 20 to be turned on, off, or the time for which the switching tube is turned on and off according to the control signal. The present embodiment does not impose any limitation on the specific structure of the driving unit 220 as long as the function thereof can be achieved.
With continued reference to fig. 3, in one embodiment, the control module 200 further includes a shaping filter unit 230.
The shaping filter unit 230 is connected between the signal generating unit 210 and the driving unit 220, and is used for shaping and filtering the control signal. The shaping filter unit 230 is used to filter out the interference signals in the control signals and smooth the control signals, so that the signals received by the driving unit 220 are more accurate, the switching tubes in the uninterruptible power supply 20 can be controlled more accurately, the synchronization of the power supply parameters of the uninterruptible power supplies 20 connected in parallel can be realized with high efficiency, and the load is equalized. The specific structure of the integer filter unit 230 is not limited in this embodiment as long as the functions thereof can be realized. In a specific embodiment, the shaping filter unit 230 is a shaping filter.
Referring to fig. 4, an embodiment of the present application provides an inverter power system 30 including an uninterruptible power supply parallel control device 10 and a plurality of uninterruptible power supplies 20 connected in parallel as provided in the above embodiment, where each uninterruptible power supply 20 is provided with a control device 11. Since the inverter power system 30 includes the ups parallel control apparatus 10, the inverter power system 30 has all the structures and advantages of the ups parallel control apparatus 10, and will not be described herein.
Referring to fig. 5, an embodiment of the present application provides an uninterruptible power supply parallel control method, which is implemented by applying the uninterruptible power supply parallel control device provided in the foregoing embodiment, and includes the specific steps of:
s100, detecting whether the power supply parameters of all the parallel uninterruptible power supplies are synchronous or not and whether the loads are current-sharing or not, and obtaining a detection result.
S200, generating a control signal according to the detection result and the power supply parameters of the uninterruptible power supplies connected in parallel.
S300, controlling the uninterruptible power supply based on the control signals so as to synchronize the power supply parameters of the uninterruptible power supplies connected in parallel and equalize loads.
And detecting whether the power supply parameters of a plurality of parallel uninterruptible power supplies working simultaneously are synchronous or not and whether loads are current-sharing or not by using the detection module. Specifically, the detection module detects the power supply parameters of the uninterruptible power supply corresponding to the uninterruptible power supply, receives related information sent by the control device corresponding to other uninterruptible power supplies, wherein the related information comprises the power supply parameters and the load current of the uninterruptible power supply corresponding to the control device, and compares the power supply parameters and the load current to obtain a detection result. The control module generates control signals according to the detection result, the power supply parameters of the uninterruptible power supply corresponding to the detection result and the power supply parameters of other uninterruptible power supplies. When the power supply parameters of the uninterruptible power supply corresponding to the control module are synchronous with the power supply parameters of other uninterruptible power supplies, the control signal can be a null signal and does not carry any useful information. When the power supply parameters of the uninterruptible power supply corresponding to the control module are not synchronous with the power supply parameters of other uninterruptible power supplies, the control module controls a power change loop in the uninterruptible power supply according to the control signal so as to enable the power supply parameters of the parallel uninterruptible power supplies which work simultaneously to be synchronous and load current sharing. For a specific description of the detection result, reference may be made to the description in the uninterruptible power supply parallel control device described above, which is not described herein.
The uninterruptible power supply parallel control method provided by the embodiment is implemented by using the uninterruptible power supply parallel control device, so that the control method has all the beneficial effects of the uninterruptible power supply parallel control device and is not repeated herein.
Referring to fig. 6, in one embodiment, step S100 detects whether the power supply parameters of each parallel ups are synchronized and whether the loads are current-sharing, including:
s110, acquiring power supply parameters and working states of all parallel uninterruptible power supplies;
s120, determining whether the power supply parameters of all parallel uninterruptible power supplies are synchronous or not based on the power supply parameters;
s130, determining whether loads of all parallel uninterruptible power supplies are current-sharing or not based on the working state.
The power supply parameters of each uninterruptible power supply can comprise the frequency, the amplitude and the phase of the output voltage of the uninterruptible power supply, and each detection module can detect the output voltage of the uninterruptible power supply corresponding to the detection module and then solve the frequency, the amplitude and the phase according to the output voltage. The operating state of the uninterruptible power supplies may include an operating state of each uninterruptible power supply, a total output current of each of the uninterruptible power supplies in parallel operating simultaneously, and an output current of each of the uninterruptible power supplies. Each detection module can determine the running state of the uninterruptible power supply by detecting the output current of the uninterruptible power supply corresponding to the detection module. Each control module can compare the power supply parameters of the corresponding uninterruptible power supply with the power supply parameters of other uninterruptible power supplies, and judge whether the power supply parameters of the uninterruptible power supply corresponding to the control module are synchronous with the power supply parameters of other uninterruptible power supplies. Meanwhile, each control module can judge whether the uninterrupted power supply corresponding to the control module and other uninterrupted power supplies are subjected to load sharing according to the load current of the uninterrupted power supply corresponding to the control module, the load current of other uninterrupted power supplies and the total output current. The method for specifically determining whether the power supply parameters are synchronous or whether the loads are current-sharing may refer to the description in the above embodiment, and will not be repeated here.
Referring to fig. 7, in one embodiment, the uninterruptible power supply parallel control method further includes:
s400, acquiring the state of a switch of each parallel uninterrupted power supply;
s500, determining the number of the parallel uninterruptible power supplies according to the states of the switches.
For a specific description of the ups switch and the status of the switch for obtaining each parallel ups, reference may be made to the description in the foregoing embodiments, which is not repeated herein. In this embodiment, the number of parallel uninterruptible power supplies that are operated simultaneously is determined by the states of the switches. The number can be used for judging whether the number of the parallel uninterrupted power supplies in the current sharing of the load is correct, so that the accuracy of judging whether the load is current sharing can be improved.
Referring to fig. 8, in one embodiment, before step S100 detects whether the power supply parameters of each parallel ups are synchronized and whether the loads are current-sharing, the method further includes:
s101, obtaining input parameters of each parallel uninterruptible power supply;
s102, determining whether each parallel uninterruptible power supply operates normally or not according to input parameters;
if yes, executing the step of detecting whether the power supply parameters of the parallel uninterrupted power supplies are synchronous or not and whether the loads are current-sharing or not.
The input parameter may include an input current. Each detection module can determine whether the uninterrupted power supply can normally operate by detecting the input current of the uninterrupted power supply corresponding to the detection module. If the uninterrupted power supply does not have input current, the uninterrupted power supply cannot normally operate, and the uninterrupted power supply has faults and needs to be maintained by staff. If there is output current in the ups, indicating that the ups can operate normally, the ups and other ups can be connected in parallel at any time in actual operation, and then step S100 is executed. In the embodiment, by detecting the input parameters of each uninterruptible power supply, the fault uninterruptible power supply can be maintained in time, and meanwhile, the normal operation of each uninterruptible power supply can be started immediately when needed, so that the practicability and reliability of the method can be improved.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. An uninterruptible power supply parallel control apparatus, wherein the uninterruptible power supply parallel control apparatus includes a plurality of control devices, each of the control devices being connected to a different uninterruptible power supply, respectively, the control device comprising: the device comprises a detection module and a control module;
the detection module is used for detecting whether the power supply parameters of the uninterruptible power supplies connected in parallel are synchronous or not and whether loads are current-sharing or not;
the control module is used for generating control signals according to the detection result of the detection module and the power supply parameters of the uninterruptible power supplies connected in parallel, and controlling the uninterruptible power supplies according to the control signals so as to synchronize the power supply parameters of the uninterruptible power supplies connected in parallel and equalize loads;
the detection module comprises:
the first detection unit is connected with the control module and is used for acquiring power supply parameters of the uninterruptible power supplies in parallel, determining whether the power supply parameters of the uninterruptible power supplies in parallel are synchronous or not based on the power supply parameters to obtain a first detection result, and sending the first detection result to the control module, wherein the power supply parameters comprise frequency, amplitude and phase of output voltage of the uninterruptible power supplies in parallel;
the second detection unit is connected with the control module and used for acquiring the working state of each parallel uninterrupted power supply, determining whether the loads of each parallel uninterrupted power supply are uniform or not based on the working state to obtain a second detection result, and sending the second detection result to the control module, wherein the working state comprises the running state of each parallel uninterrupted power supply, the total output current and the load current of each uninterrupted power supply;
the third detection unit is connected with the second detection unit and is used for detecting the state of the switch of each parallel uninterrupted power supply to obtain a third detection result, and the third detection result is sent to the second detection unit so that the second detection unit can determine the number of the parallel uninterrupted power supplies according to the running state of each parallel uninterrupted power supply and the third detection result.
2. The apparatus of claim 1, wherein the control module comprises:
the signal generating unit is connected with the detection module and used for generating a control signal according to the detection result and the power supply parameters of the uninterruptible power supplies which are connected in parallel;
and the driving unit is connected with the signal generating unit and is used for driving the uninterruptible power supplies according to the control signals so as to synchronize the power supply parameters of the uninterruptible power supplies which are connected in parallel and equalize the loads of the uninterruptible power supplies which are connected in parallel.
3. The apparatus of claim 2, wherein the control module further comprises:
and the shaping and filtering unit is connected between the signal generating unit and the driving unit and is used for shaping and filtering the control signal.
4. The apparatus of claim 1, wherein the third detection unit is a position detection device.
5. The apparatus of claim 1, wherein the first detection unit comprises an alternating voltage detection circuit and a logic determination circuit, the logic determination circuit being electrically connected to the alternating voltage detection circuit.
6. An inverter power system, comprising:
the uninterruptible power supply parallel control apparatus according to any one of claims 1 to 5;
and the uninterruptible power supplies are connected in parallel, and each uninterruptible power supply is provided with the control device.
7. A parallel uninterruptible power supply control method, characterized by applying the parallel uninterruptible power supply control apparatus according to any one of claims 1 to 5, the method comprising:
detecting whether the power supply parameters of all parallel uninterruptible power supplies are synchronous or not and whether loads are current-sharing or not to obtain a detection result;
generating a control signal according to the detection result and the power supply parameters of the uninterruptible power supplies connected in parallel;
and controlling the uninterruptible power supply based on the control signals so as to synchronize the power supply parameters of the uninterruptible power supplies connected in parallel and equalize loads.
8. The method of claim 7, wherein detecting whether the power supply parameters of each parallel ups are synchronized and whether the loads are current sharing comprises:
acquiring power supply parameters and working states of the uninterruptible power supplies connected in parallel;
determining whether the power supply parameters of the uninterruptible power supplies connected in parallel are synchronous or not based on the power supply parameters;
and determining whether loads of the uninterruptible power supplies connected in parallel are current-sharing or not based on the working state.
9. The method as recited in claim 7, further comprising:
acquiring the state of each switch of the uninterruptible power supply connected in parallel;
and determining the number of the uninterruptible power supplies connected in parallel according to the states of the switches.
10. The method of claim 7, further comprising, prior to said detecting whether the power supply parameters of each parallel ups are synchronized and whether the loads are current sharing:
obtaining input parameters of the uninterruptible power supplies connected in parallel;
determining whether each parallel uninterrupted power supply normally operates according to the input parameters;
if yes, the step of detecting whether the power supply parameters of the parallel uninterrupted power supplies are synchronous and whether the loads are current-sharing is executed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011083677.8A CN112366805B (en) | 2020-10-12 | 2020-10-12 | Uninterruptible power supply parallel control equipment, uninterruptible power supply parallel control method and inverter power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011083677.8A CN112366805B (en) | 2020-10-12 | 2020-10-12 | Uninterruptible power supply parallel control equipment, uninterruptible power supply parallel control method and inverter power supply system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112366805A CN112366805A (en) | 2021-02-12 |
| CN112366805B true CN112366805B (en) | 2023-05-02 |
Family
ID=74506669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011083677.8A Active CN112366805B (en) | 2020-10-12 | 2020-10-12 | Uninterruptible power supply parallel control equipment, uninterruptible power supply parallel control method and inverter power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112366805B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023050175A1 (en) * | 2021-09-29 | 2023-04-06 | 深圳市华思旭科技有限公司 | Control system, load device, and power tool system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006042530A (en) * | 2004-07-28 | 2006-02-09 | Densei Lambda Kk | Uninterruptible power supply device and its parallel operation system |
| CN102122896A (en) * | 2011-04-15 | 2011-07-13 | 国网电力科学研究院 | Sine wave inverter parallel system with variable current ratio |
| KR102376604B1 (en) * | 2018-07-23 | 2022-03-18 | 도시바 미쓰비시덴키 산교시스템 가부시키가이샤 | uninterruptible power supply |
-
2020
- 2020-10-12 CN CN202011083677.8A patent/CN112366805B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN112366805A (en) | 2021-02-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102480169B (en) | Method and system for quickly switching standby power supplies of multi-channel power supplies | |
| US9825487B2 (en) | Apparatus and electric power control method | |
| US9806631B2 (en) | Apparatus for controlling paralleled inverter | |
| KR101804469B1 (en) | UPS having 3 Phase 4 wire inverter with 3-leg | |
| KR101223260B1 (en) | Battery charge system and method for parallel uninterruptible power supply devices | |
| WO2017175535A1 (en) | Ground fault detection device, method for controlling same, and control program | |
| EP1834395A1 (en) | System for controlling voltage balancing in a plurality of litium-ion cell battery packs and method thereof | |
| CN109655703B (en) | Self-checking method, device and equipment for parallel power modules and storage medium | |
| KR20130078060A (en) | Apparatus and method for detecting failure of switching device in inverter | |
| CN112366805B (en) | Uninterruptible power supply parallel control equipment, uninterruptible power supply parallel control method and inverter power supply system | |
| KR20160050546A (en) | Apparatus for controlling inverter | |
| KR101198638B1 (en) | Parallel Operation Apparatus using Magnetic Load Sharing Transformer | |
| CN115184838B (en) | Relay short circuit failure detection method and device | |
| CN116345614A (en) | Abnormality detection method, energy storage device, and storage medium | |
| CN112858898B (en) | Relay fault detection method | |
| CN104518677A (en) | Matrix converter | |
| CN113777429A (en) | Filter capacitor failure early warning method and control device | |
| CN101345485A (en) | Simulation power supply of four-quadrant electric network | |
| CN214795020U (en) | Phase-loss detection circuit and electronic equipment | |
| CN216144919U (en) | Microcomputer relay protection testing arrangement | |
| CN215732943U (en) | Control cabinet | |
| CN115373324B (en) | Board card power supply time sequence control and monitoring method and device based on micro control unit | |
| WO2022219805A1 (en) | Uninterruptible power supply device | |
| US20230366953A1 (en) | Detection method and related apparatus | |
| KR20190068887A (en) | Ac output voltage parallel operation control device of aps in railway |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |