CN-121097922-B - Power supply system and power supply method based on modularized UPS (uninterrupted Power supply)

CN121097922BCN 121097922 BCN121097922 BCN 121097922BCN-121097922-B

Abstract

A power supply system and a power supply method based on a modularized UPS (uninterrupted Power supply) comprise the steps of collecting operation parameters of UPS modules, obtaining load bearing priorities of all UPS modules based on the operation parameters, collecting operation power of target loads, obtaining target load power of a power-on UPS module based on the load bearing priorities, the operation parameters and the operation power of all UPS modules, detecting the power-on UPS module in real time, marking the power-on UPS module as a normal state or a fault state according to a real-time detection result, performing trend analysis and secondary detection on the power-on UPS module in the normal state, executing switching operation of the power-on UPS module when the power-on UPS module is marked as the fault state or an early warning state, performing fluctuation detection on the target load, and executing self-adaptive power-on UPS module scheduling operation according to the detection result, thereby remarkably improving the overall efficiency and reliability of the UPS module.

Inventors

CUI XIANFENG
TIAN YANG
Lou Junwang
CHEN BO
CHEN LIXIN

Assignees

天津江天数据科技有限公司

Dates

Publication Date: 20260505
Application Date: 20251111

Claims (4)

1. The power supply system based on the modularized UPS power supply is characterized by comprising a central controller, wherein the central controller is in communication connection with a plurality of UPS modules, a bearing selection module, a load distribution module, a power-on UPS detection module, a module fault response module and a load detection module; The UPS module comprises a local control module and a state monitoring module, wherein the local control module is used for operating the power-on UPS module based on the target load power of the power-on UPS module, the state monitoring module is used for collecting the operation parameters of the UPS module and marking the collection time, and the collection period is set, and the operation parameters comprise rated power, module temperature rise, accumulated operation time and real-time efficiency; The load bearing selection module is used for extracting rated power, real-time efficiency, module temperature rise and accumulated running time of each UPS module from the running parameters of each UPS module as evaluation indexes, setting index weights of the evaluation indexes, and acquiring load bearing priorities of each UPS module according to the evaluation indexes and the index weights; The load distribution module is used for carrying out positive sequence sequencing on the load bearing priority of each UPS module, generating a bearing queue, acquiring a preset load rate and rated power of each UPS module in the bearing queue, acquiring the number K of required UPS modules according to the preset load rate, the rated power of each UPS module and the running power of a target load, carrying out load distribution on the front K UPS modules in the bearing queue according to the rated power of each UPS module, the preset load rate and the running power of the target load, acquiring the target load powers of the front K UPS modules, and marking the front K UPS modules as power-on UPS modules; the power-on UPS detection module is used for detecting the power-on UPS module in real time, marking the power-on UPS module as a normal state or a fault state according to a real-time detection result, carrying out trend analysis and secondary detection on the power-on UPS module in the normal state, and judging whether the power-on UPS module is marked as an early warning state or updating an evaluation index of the bearing selection module according to a secondary detection result; the process for carrying out trend analysis on the power-on UPS module in the normal state comprises the following steps: performing feature extraction on various indexes of the electrified UPS module at the end time stamp of the acquisition period to obtain a feature parameter set, constructing an operation prediction model, obtaining numerical time sequence sequences and feature parameter sets of various indexes of a plurality of UPS modules in a plurality of historical continuous acquisition periods as training data, and training the operation prediction model by utilizing the training data to obtain an operation prediction model which is completed to be trained; Inputting the numerical time sequence and the characteristic parameter set of each type of index of the power-on UPS module in the acquisition period into an operation prediction model, and outputting the predicted numerical time sequence of each type of index of the power-on UPS module in the next acquisition period according to the operation prediction model; The process of carrying out secondary detection on the power-on UPS module in the normal state comprises the following steps: Comparing the estimated value time sequence of each type of index of the power-on UPS module with a preset threshold interval of each type of index, and marking the power-on UPS module as an early warning state if the type index is not located in the corresponding preset threshold interval; if all the types of indexes of the electrified UPS module are located in the corresponding preset threshold value interval, comparing the real-time efficiency and the estimated value time sequence of the module temperature rise in all the types of indexes with the evaluation indexes of the bearing selection module, obtaining the average change amplitude of the evaluation indexes, presetting the upper limit of the change amplitude, and if the average change amplitude of the evaluation indexes is larger than the upper limit of the change amplitude, updating the evaluation indexes of the bearing selection module according to the average change amplitude of the evaluation indexes, and regenerating the load bearing priority and the bearing queue of each UPS module after the update of the evaluation indexes of the bearing selection module is completed; the module fault coping module is used for cutting off the input and output of the power-on UPS module when the power-on UPS module is marked as a fault state or an early warning state, acquiring target load power of the power-on UPS module, acquiring the required number R of the UPS modules based on the target load power of the power-on UPS module, a preset load rate and rated power of each UPS module sequenced after the power-on UPS module in a load sequence, carrying out load distribution based on the rated power of the former R UPS modules sequenced after the power-on UPS module, the target load power of the power-on UPS module and the preset load rate, acquiring the target load power of the former R UPS modules, and marking the former R UPS modules as the power-on UPS module; The load detection module is used for comparing the running power of each moment of the target load with the running power of the last moment, presetting an error redundancy threshold value, acquiring a running power difference value, when the running power difference value is larger than the error redundancy threshold value, acquiring the redundant power of each power-on UPS module based on the rated power and the preset load rate of each power-on UPS module if the running power difference value is positive, judging whether the running power difference value is larger than the sum of the redundant powers of each power-on UPS module, acquiring the required number Q of the UPS modules according to the preset load rate, the rated power of the non-power-on UPS modules in the load bearing queue and the running power difference value, carrying out load distribution according to the preset load rate, the running power difference value and the rated power of the front Q non-power-on UPS modules in the load bearing queue, acquiring the target load power of the front Q UPS modules, and marking the front Q UPS modules as the power-on UPS modules; If the power difference is not larger than the preset power difference, the preset load rate and the redundant power of each power-on UPS module, redundant load distribution is carried out on each power-on UPS module, the redundant load of each power-on UPS module is obtained, and the target load power of the power-on UPS module at the current moment is obtained according to the redundant load of each power-on UPS module.
2. The modular UPS power source based power system of claim 1 wherein the process of real-time detection of powered UPS modules includes: comparing various indexes in the operation parameters of the power-on UPS module with preset threshold intervals of various indexes, marking the power-on UPS module as a normal state if the various indexes of the power-on UPS module are all located in the corresponding preset threshold intervals, and marking the power-on UPS module as a fault state if the type indexes of the power-on UPS module are not located in the corresponding preset threshold intervals.
3. The modular UPS power source based power system of claim 2 wherein if the operating power difference is negative, the predetermined load factor is reduced based on the operating power difference and the power ratings of each powered UPS module.
4. A modular UPS power source-based power supply method, in particular for a modular UPS power source-based power supply system as claimed in any one of claims 1 to 3, comprising Step one, collecting operation parameters of a UPS module, marking the collection time, and setting a collection period; acquiring the load bearing priority of each UPS module based on the operation parameters; Acquiring the running power of a target load, and acquiring the target load power of the electrified UPS module based on the load bearing priority, the running parameters and the running power of each UPS module; The power-on UPS module is detected in real time, the power-on UPS module is marked as a normal state or a fault state according to a real-time detection result, trend analysis and secondary detection are carried out on the power-on UPS module in the normal state, and whether the power-on UPS module is marked as an early warning state or an evaluation index of the bearing selection module is updated is judged according to a secondary detection result; And fifthly, when the power-on UPS module is marked as a fault state or an early warning state, executing switching operation of the power-on UPS module, detecting fluctuation of a target load, and executing dispatching operation of the self-adaptive power-on UPS module according to a detection result.

Description

Power supply system and power supply method based on modularized UPS (uninterrupted Power supply) Technical Field The invention relates to the technical field of Uninterruptible Power Supplies (UPS), in particular to a power supply system and a power supply method based on a modularized UPS power supply. Background Along with the rapid development of digital and informatization technologies, the continuous and stability dependence degree of the power supply system in the fields of data centers, industrial production and the like is increasingly improved, the UPS power supply is used as key power supply guarantee equipment, and the performance of the UPS power supply directly influences the safe operation of load equipment. The traditional UPS power supply mostly adopts a centralized architecture, and has the following technical defects: The expansibility is poor, the power and the capacity of the centralized UPS are fixed, if the load demand is increased, the equipment needs to be replaced integrally, the cost is high, the construction is complex, and the dynamic change of the load cannot be flexibly adapted; The centralized UPS is of a single-body structure, any core component failure can lead to paralysis of the whole system, redundancy backup capacity is avoided, and the requirement of a high-reliability scene is difficult to meet; The load distribution is extensive, namely, depending on a simple current sharing strategy, multidimensional indexes such as module health degree (temperature rise, accumulated running time), real-time efficiency and the like cannot be integrated, so that overload aging of a high-load module and energy waste of a low-load module coexist. The fault response is lagged, namely fault isolation is triggered only by threshold overrun, trend analysis based on time sequence data is lacking, early warning can not be carried out before indexes approach to the threshold, and the fault diffusion risk is high. The dynamic adaptability is insufficient, and the self-adaptive load rate adjustment is lacked in the face of load fluctuation. The prior art lacks "data-driven dynamic cooperative control" -neither optimizing load distribution by multi-source data nor predicting faults based on historical timing, ultimately resulting in the flexibility advantage of modular UPSs being offset by short boards of reliability, efficiency and maintenance costs. Disclosure of Invention In order to solve the technical problems, the invention aims to provide a power supply system based on a modularized UPS power supply, which comprises a central controller, wherein the central controller is in communication connection with a plurality of UPS modules, a bearing selection module, a load distribution module, a power-on UPS detection module, a module fault response module and a load detection module; The UPS module comprises a rectifier, an inverter, a bidirectional DC/DC converter, a local control module and a state monitoring module, wherein the rectifier is used for converting alternating current of mains supply into alternating current required by a load, the inverter is used for converting the direct current into alternating current required by the load, the bidirectional DC/DC converter is used for realizing energy bidirectional flow of the UPS module and an energy storage unit, the local control module is used for operating the power-on UPS module based on target load power of the power-on UPS module, the state monitoring module is used for collecting operation parameters of the UPS module and marking collection time, the collection period is set, the operation parameters comprise rated power, input voltage, input current, output voltage, output current, module temperature rise, accumulated operation time and real-time efficiency, and the real-time efficiency is the ratio of the active power output by the UPS module to the load to the total active power acquired by the UPS module from the input side (the input side comprises the mains supply, the photovoltaic and the energy storage unit); the load bearing selection module is used for acquiring the load bearing priority of each UPS module based on the operation parameters; The load distribution module is used for collecting the running power of the target load and obtaining the target load power of the electrified UPS module based on the load bearing priority, the running parameters and the running power of each UPS module; the power-on UPS detection module is used for detecting the power-on UPS module in real time, marking the power-on UPS module as a normal state or a fault state according to a real-time detection result, carrying out trend analysis and secondary detection on the power-on UPS module in the normal state, and judging whether the power-on UPS module is marked as an early warning state or updating an evaluation index of the bearing selection module according to a secondary detection result; the module fault handling module is used for execut