CN118054388A - Three-level uninterruptible power supply mode control system and method based on DC power supply system - Google Patents
Three-level uninterruptible power supply mode control system and method based on DC power supply system Download PDFInfo
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- CN118054388A CN118054388A CN202410139742.6A CN202410139742A CN118054388A CN 118054388 A CN118054388 A CN 118054388A CN 202410139742 A CN202410139742 A CN 202410139742A CN 118054388 A CN118054388 A CN 118054388A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for DC mains or DC distribution networks
- H02J1/10—Parallel operation of DC sources
- H02J1/109—Scheduling or re-scheduling the operation of the DC sources in a particular order, e.g. connecting or disconnecting the sources in sequential, alternating or in subsets, to meet a given demand
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/36—Arrangements for transfer of electric power between AC networks via a high-tension DC link
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- 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
- H02J9/061—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 for DC powered loads
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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Abstract
本发明公开了基于直流电源系统的三级不间断供电模式控制系统，包括：AC/DC整流模块、并联电源组件、直流负载，还包括续流回路，所述续流回路由直流母线、续流二极管与多个并联电源组件串联构成，用于通过拓扑接线更换，切换供电模式。还公开了基于直流电源系统的三级不间断供电模式控制方法，包括以下步骤：S1：提取三级不间断供电电源的关键状态量；S2：判断供电回路的工况；S3：根据当前的供电工况切换三级不间断供电系统的供电模式。本发明基于改进拓扑的三级不间断供电模式灵活切换方法，设计改进的并联型直流电源拓扑结构，使电源可以在正常、异常、极端三种工况下都能够正常且可靠供电，提升供电场景多变情况下供电方案的可靠性。
The present invention discloses a three-level uninterruptible power supply mode control system based on a DC power supply system, including: an AC/DC rectifier module, a parallel power supply component, a DC load, and a freewheeling circuit, wherein the freewheeling circuit is composed of a DC bus, a freewheeling diode and a plurality of parallel power supply components in series, and is used to switch the power supply mode by replacing the topological wiring. A three-level uninterruptible power supply mode control method based on a DC power supply system is also disclosed, including the following steps: S1: extracting key state quantities of a three-level uninterruptible power supply; S2: judging the working condition of the power supply circuit; S3: switching the power supply mode of the three-level uninterruptible power supply system according to the current power supply working condition. The present invention is based on a flexible switching method of a three-level uninterruptible power supply mode with an improved topology, and designs an improved parallel DC power supply topology structure, so that the power supply can be normally and reliably supplied under normal, abnormal and extreme working conditions, thereby improving the reliability of the power supply scheme under the condition of variable power supply scenarios.
Description
Technical Field
The invention relates to the technical field of direct-current power supply system control, in particular to a three-stage uninterrupted power supply mode control system and method based on a direct-current power supply system.
Background
The direct current power supply system is widely applied to the scene that the power supply reliability is high, wherein the storage battery pack formed by connecting a plurality of storage batteries in series is a key for reliable power supply of the direct current power supply system, and the performance degradation of a single storage battery often becomes a short plate for restricting the reliable power supply of the whole storage battery pack and even the direct current power supply system. The three-stage uninterrupted power supply technology is a technology upgrading of a traditional serial direct current power supply system and is a special technology under a storage battery parallel direct current power supply system. A battery parallel type direct current power supply system is a device system in which a plurality of batteries (power supplies) are connected in parallel to provide a higher output voltage or current. Taking a parallel type direct current power supply system based on a power electronic module and an intelligent control technology as an example, the basic idea is that a single battery directly boosts to obtain rated voltage through the power electronic module, the single battery and a charge and discharge management and control module form a power supply component (branch), and a reasonable number of power supply components (branches) are connected in parallel to meet the total capacity requirement of the direct current power supply system. This type of device is widely used in various fields such as substations, power plants, renewable energy fields (stations), rail transit, data centers, etc.
In the prior art, since the conventional series-type direct current power supply system can ensure reliable power supply of the direct current power supply system under normal power supply working conditions only when each single body in the whole group of storage batteries runs healthily, reliable power supply cannot be ensured under abnormal and extreme fault working conditions such as single storage battery faults, and therefore, the circuit structure needs to be improved to ensure the power supply reliability under the abnormal and extreme fault working conditions.
Disclosure of Invention
The invention can flexibly cope with three different working conditions: the three-level uninterrupted power supply mode control system and the method based on the direct current power supply system can at least solve one of the technical problems.
In order to solve the technical problems, the invention adopts the following technical scheme:
A three-stage uninterruptible power supply mode control system based on a direct current power supply system, comprising:
the AC/DC rectifying module is used for providing direct-current power supply power for the direct-current bus and providing charging power for the parallel power supply assembly;
the parallel power supply assembly is provided with a plurality of parallel power supply assemblies which are respectively connected to the direct current bus in parallel through the bidirectional DC-DC grouping management module and are used as standby power supplies in abnormal states of the alternating current units;
A plurality of direct current loads connected in parallel to the direct current buses through air switches respectively;
The power supply system further comprises a follow current loop, wherein the follow current loop is formed by connecting a direct current bus, a follow current diode and a plurality of parallel power supply components in series and is used for switching a power supply mode through topological wiring replacement.
Further, the flywheel diodes are respectively connected in series to two sides of the plurality of parallel power supply components, and are respectively connected in series to the direct current buses.
Further, the parallel power supply assembly includes a plurality of parallel battery packs.
Further, the AC/DC rectification module is connected to a remote alternating current power source.
Further, under normal working conditions, the electric energy flows to: and an alternating current power supply supplies direct current power supply energy to the direct current bus through the AC/DC rectifying module, and supplies charging energy to the parallel power supply assembly, and the follow current loop does not flow current.
Further, under abnormal working conditions, the electric energy flows to: the alternating current power supply stops supplying power, the parallel power supply assembly supplies power to the direct current bus through the bidirectional DC/DC grouping management module, and the follow current loop does not flow current.
Further, under extreme working conditions, the electric energy flows to: the alternating current power supply stops supplying power, the bidirectional DC/DC grouping management module no longer flows current, and the follow current loop transmits current to the direct current bus and supplies power to the direct current load.
The three-stage uninterrupted power supply mode control method based on the direct current power supply system is realized by adopting the three-stage uninterrupted power supply mode control system based on the direct current power supply system, and further comprises the following steps:
s1: extracting key state quantity of a three-stage uninterruptible power supply:
s11: voltage stability:
uw is the voltage stability, ui is the voltage at i time, Is the average voltage at a plurality of moments;
the state quantity reflects the voltage fluctuation condition of the power supply system, and when the fluctuation is large, the power supply reliability is poor, and the switching power supply is needed to be considered;
s12: current stability:
iw is the current stability, ii is the current at the instant i, Average current for a plurality of time instants;
the state quantity reflects the current fluctuation condition of the power supply system, and when the fluctuation is large, the load is represented to have large change, so that the power supply reliability is possibly reduced;
S13: power fluctuation:
Pw is the power stability, pi is the power at i time, Average power for a plurality of time instants;
the state quantity reflects the power fluctuation condition of the power supply system, and when the fluctuation is large, the load is represented to have large change, so that the power supply reliability is possibly reduced;
S14: power capacity sufficiency:
Cw is the capacity stability, ci is the capacity at i time, Average capacity for a plurality of time instants;
This state quantity reflects the condition of sufficient capacity of the power supply system, and when the fluctuation is large, it represents that there is a change in the capacity of the power supply source itself, possibly resulting in a decrease in the power supply reliability.
S2: judging the working condition of a power supply loop:
S21: based on the association relation between the historical working data of the power supply and the state quantities, setting weight coefficients corresponding to different parameters to obtain a corresponding function f of multi-parameter fusion analysis:
f＝ω1Uw+ω2Iw+ω3Pw+ω4Cw
Omega 1～ω4 is a weight coefficient corresponding to each of a plurality of parameters, the correlation sizes of Uw, iw, pw, cw and the power supply state of the power supply are sequentially set, and the correlation sizes are arranged according to Uw > Cw > Iw > Pw, so that the numerical values of omega 1～ω4 are respectively 0.4, 0.2, 0.1 and 0.3;
s22: calculating to obtain the value of the function f, and judging the interval:
f is in the (0, 0.3) interval, and the corresponding power supply working condition is normal;
f is in the interval (0.3, 0.6), and the corresponding power supply working condition is abnormal;
f is in the (0.6,1) interval, and the corresponding power supply working condition is extreme.
S3: and switching the power supply mode of the three-level uninterrupted power supply system according to the current power supply working condition.
The beneficial effects of the invention are as follows:
1. According to the multi-parameter fusion-based power supply working condition classification method, the fusion judgment method is provided according to the association relation between the state quantity and the power supply scheme by extracting the key state quantity of the three-stage uninterrupted power supply system, so that the intelligent judgment of the power supply working condition is realized, a basis is provided for three-stage power supply mode switching, and the problem that the power supply mode is difficult to switch in time is solved.
2. The invention designs an improved parallel direct current power supply topological structure aiming at different power supply working conditions based on the three-stage uninterrupted power supply mode flexible switching method of the improved topology, and can ensure that a power supply can normally and reliably supply power under three working conditions of normal, abnormal and extreme by dynamically switching different topological structures, thereby improving the reliability of a power supply scheme under the condition of changeable power supply scenes.
Drawings
Fig. 1 is a schematic circuit diagram of a parallel dc power supply system.
Fig. 2 is a schematic circuit diagram of a parallel dc power supply system in a three-stage uninterruptible power supply mode according to an embodiment of the invention.
FIG. 3 is a schematic diagram of the flow of electrical energy under normal operating conditions of a three-stage uninterruptible power supply system in accordance with an embodiment of the invention.
FIG. 4 is a schematic diagram of the flow of electrical energy under abnormal conditions of a three-stage uninterruptible power supply system in accordance with an embodiment of the present invention.
FIG. 5 is a schematic diagram of the flow of electrical energy under extreme conditions of a three stage uninterruptible power supply system in accordance with an embodiment of the invention.
FIG. 6 is a schematic flow chart of a control method of a three-stage uninterruptible power supply mode in an embodiment of the invention.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. Embodiments of the application and features of the embodiments may be combined with each other without conflict. It should be noted that, if the meaning of "and/or" appears throughout, it includes three parallel schemes, taking "a and/or B" as an example, including a scheme, or B scheme, or a scheme where a and B meet simultaneously. In addition, "a plurality of" means two or more.
Referring to fig. 1, an embodiment of the present invention provides a three-stage uninterruptible power supply mode control system based on a dc power supply system, including:
the AC/DC rectifying module is used for providing direct-current power supply power for the direct-current bus and providing charging power for the parallel power supply assembly;
the parallel power supply assembly is provided with a plurality of parallel power supply assemblies which are respectively connected to the direct current bus in parallel through the bidirectional DC-DC grouping management module and are used as standby power supplies in abnormal states of the alternating current units;
A plurality of direct current loads connected in parallel to the direct current buses through air switches respectively;
The power supply system further comprises a follow current loop, wherein the follow current loop is formed by connecting a direct current bus, a follow current diode and a plurality of parallel power supply components in series and is used for switching a power supply mode through topological wiring replacement.
The invention designs an improved parallel direct current power supply topological structure aiming at different power supply working conditions based on the three-stage uninterrupted power supply mode flexible switching method of the improved topology, and can ensure that a power supply can normally and reliably supply power under three working conditions of normal, abnormal and extreme by dynamically switching different topological structures, thereby improving the reliability of a power supply scheme under the condition of changeable power supply scenes.
In this embodiment, the parallel power supply assembly includes a plurality of parallel storage battery packs and a bidirectional DC/DC grouping management module matched with each storage battery pack, where the bidirectional DC/DC grouping management module is used to implement grouping management of the storage battery packs and bidirectional feedback of electric energy, and provide a more flexible storage battery charge and discharge management mode for the DC power supply system.
In this embodiment, two freewheeling diodes are respectively connected in series to two sides of the parallel power supply assemblies and respectively connected in series to the dc bus, so as to provide a standby electrical loop connected with the dc bus for the parallel power supply assemblies.
In this embodiment, the AC/DC rectifying module is connected to an AC side power supply in the substation by using a high-frequency rectifying module for power, so as to convert AC into DC, and provide normal power supply for the DC power supply system.
In this embodiment, under normal working conditions, the electric energy flows to: and an alternating current power supply supplies direct current power supply energy to the direct current bus through the AC/DC rectifying module, and supplies charging energy to the parallel power supply assembly, and the follow current loop does not flow current.
In this embodiment, under abnormal conditions, the flow direction of electrical energy is: the alternating current power supply stops supplying power, the parallel power supply assembly supplies power to the direct current bus through the bidirectional DC/DC grouping management module, and the follow current loop does not flow current.
In this embodiment, under the extreme working condition, the electric energy flow direction is: the alternating current power supply stops supplying power, the bidirectional DC/DC grouping management module no longer flows current, and the follow current loop transmits current to the direct current bus and supplies power to the direct current load.
Referring to fig. 2, the embodiment of the invention further provides a three-stage uninterruptible power supply mode control method based on a direct-current power supply system, which is implemented by adopting the three-stage uninterruptible power supply mode control system based on the direct-current power supply system, and further comprises the following steps:
s1: extracting key state quantity of a three-stage uninterruptible power supply:
s11: voltage stability:
uw is the voltage stability, ui is the voltage at i time, Is the average voltage at a plurality of moments;
the state quantity reflects the voltage fluctuation condition of the power supply system, and when the fluctuation is large, the power supply reliability is poor, and the switching power supply is needed to be considered;
s12: current stability:
iw is the current stability, ii is the current at the instant i, Average current for a plurality of time instants;
the state quantity reflects the current fluctuation condition of the power supply system, and when the fluctuation is large, the load is represented to have large change, so that the power supply reliability is possibly reduced;
S13: power fluctuation:
Pw is the power stability, pi is the power at i time, Average power for a plurality of time instants;
the state quantity reflects the power fluctuation condition of the power supply system, and when the fluctuation is large, the load is represented to have large change, so that the power supply reliability is possibly reduced;
S14: power capacity sufficiency:
Cw is the capacity stability, ci is the capacity at i time, Average capacity for a plurality of time instants;
This state quantity reflects the condition of sufficient capacity of the power supply system, and when the fluctuation is large, it represents that there is a change in the capacity of the power supply source itself, possibly resulting in a decrease in the power supply reliability.
The three-level uninterrupted power supply is output by three high-voltage alternating current power supplies, one is a main power supply, the other is a standby power supply, and the other is a diesel generator set for generating power or outputting other emergency power supplies, wherein the main (standby) power supply can realize the voltage conversion of a power supply grid into three-phase low-voltage power supply input through selecting distribution transformers with different specifications, and the diesel generator set can select generator sets with different specifications and types (different power supply capacities) according to corresponding working actual requirements;
By extracting the key state quantity of the three-stage uninterruptible power supply, the method is beneficial to providing data support and decision basis for the decision of a subsequent power supply scheme.
S2: judging the working condition of a power supply loop:
S21: based on the association relation between the historical working data of the power supply and the state quantities, setting weight coefficients corresponding to different parameters to obtain a corresponding function f of multi-parameter fusion analysis:
f＝ω1Uw+ω2Iw+ω3Pw+ω4Cw
Omega 1～ω4 is a weight coefficient corresponding to each of a plurality of parameters, the correlation sizes of Uw, iw, pw, cw and the power supply state of the power supply are sequentially set, and the correlation sizes are arranged according to Uw > Cw > Iw > Pw, so that the numerical values of omega 1～ω4 are respectively 0.4, 0.2, 0.1 and 0.3;
s22: calculating to obtain the value of the function f, and judging the interval:
f is in the (0, 0.3) interval, and the corresponding power supply working condition is normal;
f is in the interval (0.3, 0.6), and the corresponding power supply working condition is abnormal;
f is in the (0.6,1) interval, and the corresponding power supply working condition is extreme.
S3: and switching the power supply mode of the three-level uninterrupted power supply system according to the current power supply working condition.
According to the multi-parameter fusion-based power supply working condition classification method, the fusion judgment method is provided according to the association relation between the state quantity and the power supply scheme by extracting the key state quantity of the three-stage uninterrupted power supply system, so that the intelligent judgment of the power supply working condition is realized, a basis is provided for three-stage power supply mode switching, and the problem that the power supply mode is difficult to switch in time is solved.
It should be understood that the examples and embodiments described herein are for illustrative purposes only and are not intended to limit the present invention, and that various modifications or changes in light thereof will be suggested to persons skilled in the art and are to be included within the spirit and purview of this application.
Claims (8)
1. A three-stage uninterruptible power supply mode control system based on a direct current power supply system, comprising:
the AC/DC rectifying module is used for providing direct-current power supply power for the direct-current bus and providing charging power for the parallel power supply assembly;
the parallel power supply assembly is provided with a plurality of parallel power supply assemblies which are respectively connected to the direct current bus in parallel through the bidirectional DC-DC grouping management module and are used as standby power supplies in abnormal states of the alternating current units;
A plurality of direct current loads connected in parallel to the direct current buses through air switches respectively;
the power supply system is characterized by further comprising a follow current loop, wherein the follow current loop is formed by connecting a direct current bus, a follow current diode and a plurality of parallel power supply components in series and is used for switching a power supply mode through topological wiring replacement.
2. The three-stage uninterruptible power supply mode control system based on a direct current power supply system according to claim 1, wherein the flywheel diodes are connected in series on two sides of the plurality of parallel power supply components respectively and connected to the direct current buses respectively.
3. The three stage uninterruptible power supply mode control system based on a direct current power supply system of claim 1, wherein the parallel power supply assembly includes a plurality of parallel battery packs.
4. The three stage uninterruptible power mode control system based on a direct current power system of claim 1, wherein the AC/DC rectification module is connected to a remote alternating current power source.
5. The three-stage uninterruptible power supply mode control system based on a direct current power supply system according to claim 1, wherein under normal working conditions, the flow direction of electric energy is: and an alternating current power supply supplies direct current power supply energy to the direct current bus through the AC/DC rectifying module, and supplies charging energy to the parallel power supply assembly, and the follow current loop does not flow current.
6. The three-stage uninterruptible power supply mode control system based on a direct current power supply system according to claim 1, wherein under abnormal conditions, the flow direction of electric energy is: the alternating current power supply stops supplying power, the parallel power supply assembly supplies power to the direct current bus through the bidirectional DC/DC grouping management module, and the follow current loop does not flow current.
7. The three-stage uninterruptible power supply mode control system based on a direct current power supply system according to claim 1, wherein under extreme conditions, the power flow direction is: the alternating current power supply stops supplying power, the bidirectional DC/DC grouping management module no longer flows current, and the follow current loop transmits current to the direct current bus and supplies power to the direct current load.
8. The three-stage uninterrupted power supply mode control method based on the direct current power supply system is realized by adopting the three-stage uninterrupted power supply mode control system based on the direct current power supply system according to any one of claims 1-7, and is characterized by further comprising the following steps:
s1: extracting key state quantity of a three-stage uninterruptible power supply:
s11: voltage stability:
uw is the voltage stability, ui is the voltage at i time, Is the average voltage at a plurality of moments;
the state quantity reflects the voltage fluctuation condition of the power supply system, and when the fluctuation is large, the power supply reliability is poor, and the switching power supply is needed to be considered;
s12: current stability:
iw is the current stability, ii is the current at the instant i, Average current for a plurality of time instants;
the state quantity reflects the current fluctuation condition of the power supply system, and when the fluctuation is large, the load is represented to have large change, so that the power supply reliability is possibly reduced;
S13: power fluctuation:
Pw is the power stability, pi is the power at i time, Average power for a plurality of time instants;
the state quantity reflects the power fluctuation condition of the power supply system, and when the fluctuation is large, the load is represented to have large change, so that the power supply reliability is possibly reduced;
S14: power capacity sufficiency:
Cw is the capacity stability, ci is the capacity at i time, Average capacity for a plurality of time instants;
This state quantity reflects the condition of sufficient capacity of the power supply system, and when the fluctuation is large, it represents that there is a change in the capacity of the power supply source itself, possibly resulting in a decrease in the power supply reliability.
S2: judging the working condition of a power supply loop:
S21: based on the association relation between the historical working data of the power supply and the state quantities, setting weight coefficients corresponding to different parameters to obtain a corresponding function f of multi-parameter fusion analysis:
f＝ω1Uw+ω2Iw+ω3Pw+ω4Cw
Omega 1～ω4 is a weight coefficient corresponding to each of a plurality of parameters, the correlation sizes of Uw, iw, pw, cw and the power supply state of the power supply are sequentially set, and the correlation sizes are arranged according to Uw > Cw > Iw > Pw, so that the numerical values of omega 1～ω4 are respectively 0.4, 0.2, 0.1 and 0.3;
s22: calculating to obtain the value of the function f, and judging the interval:
f is in the (0, 0.3) interval, and the corresponding power supply working condition is normal;
f is in the interval (0.3, 0.6), and the corresponding power supply working condition is abnormal;
f is in the (0.6,1) interval, and the corresponding power supply working condition is extreme.
S3: and switching the power supply mode of the three-level uninterrupted power supply system according to the current power supply working condition.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119651526A (en) * | 2025-02-20 | 2025-03-18 | 珠海瓦特电力设备有限公司 | A parallel battery module and management method |
| CN119675231A (en) * | 2025-02-24 | 2025-03-21 | 合肥工业大学 | DC bus voltage stabilization control method and system based on three-level uninterruptible power supply |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050162018A1 (en) * | 2004-01-21 | 2005-07-28 | Realmuto Richard A. | Multiple bi-directional input/output power control system |
| CN102104263A (en) * | 2009-12-17 | 2011-06-22 | 台达电子工业股份有限公司 | High-voltage direct-current uninterruptible power supply system with multiple input power supplies |
| US20130026836A1 (en) * | 2011-07-29 | 2013-01-31 | American Power Conversion Corporation | Non-isolated ac-dc converter having a positive output buck-boost converter and pfc at input supply |
| CN106253358A (en) * | 2016-08-25 | 2016-12-21 | 江西清华泰豪三波电机有限公司 | A kind of uninterrupted vehicle-mounted comprehensive power electric power system of two-output impulse generator |
| CN107222029A (en) * | 2017-08-04 | 2017-09-29 | 广东电网有限责任公司电力科学研究院 | Combined modular movable energy storage system |
| CN107846136A (en) * | 2017-10-31 | 2018-03-27 | 北方智能装备有限公司 | A kind of concentrator of high power density power module |
| US20220140644A1 (en) * | 2011-05-08 | 2022-05-05 | Koolbridge Solar, Inc. | Solar Energy System with Variable Priority Circuit Backup |
| CN115693907A (en) * | 2022-11-24 | 2023-02-03 | 天津铁路信号有限责任公司 | Non-switching uninterrupted railway signal power supply circuit |
-
2024
- 2024-01-31 CN CN202410139742.6A patent/CN118054388B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050162018A1 (en) * | 2004-01-21 | 2005-07-28 | Realmuto Richard A. | Multiple bi-directional input/output power control system |
| CN102104263A (en) * | 2009-12-17 | 2011-06-22 | 台达电子工业股份有限公司 | High-voltage direct-current uninterruptible power supply system with multiple input power supplies |
| US20220140644A1 (en) * | 2011-05-08 | 2022-05-05 | Koolbridge Solar, Inc. | Solar Energy System with Variable Priority Circuit Backup |
| US20130026836A1 (en) * | 2011-07-29 | 2013-01-31 | American Power Conversion Corporation | Non-isolated ac-dc converter having a positive output buck-boost converter and pfc at input supply |
| CN103828187A (en) * | 2011-07-29 | 2014-05-28 | 施耐德电气It公司 | Non-isolated ac-dc converter having positive output buck-boost converter and pfc at input supply |
| CN106253358A (en) * | 2016-08-25 | 2016-12-21 | 江西清华泰豪三波电机有限公司 | A kind of uninterrupted vehicle-mounted comprehensive power electric power system of two-output impulse generator |
| CN107222029A (en) * | 2017-08-04 | 2017-09-29 | 广东电网有限责任公司电力科学研究院 | Combined modular movable energy storage system |
| CN107846136A (en) * | 2017-10-31 | 2018-03-27 | 北方智能装备有限公司 | A kind of concentrator of high power density power module |
| CN115693907A (en) * | 2022-11-24 | 2023-02-03 | 天津铁路信号有限责任公司 | Non-switching uninterrupted railway signal power supply circuit |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119651526A (en) * | 2025-02-20 | 2025-03-18 | 珠海瓦特电力设备有限公司 | A parallel battery module and management method |
| CN119651526B (en) * | 2025-02-20 | 2025-08-19 | 珠海瓦特电力设备有限公司 | Parallel storage battery module and management method |
| CN119675231A (en) * | 2025-02-24 | 2025-03-21 | 合肥工业大学 | DC bus voltage stabilization control method and system based on three-level uninterruptible power supply |
| CN119675231B (en) * | 2025-02-24 | 2025-05-09 | 合肥工业大学 | DC bus voltage stable control method and system based on three-stage uninterrupted power supply |
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