CN109450074B - UPS parallel operation segmented power supply energy-saving configuration system - Google Patents
UPS parallel operation segmented power supply energy-saving configuration system Download PDFInfo
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- CN109450074B CN109450074B CN201811510090.3A CN201811510090A CN109450074B CN 109450074 B CN109450074 B CN 109450074B CN 201811510090 A CN201811510090 A CN 201811510090A CN 109450074 B CN109450074 B CN 109450074B
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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
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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
The invention discloses an energy-saving configuration system for a UPS parallel operation segmented power supply, and relates to the technical field of power supply configuration. The UPS system adopts parallel operation sectional configuration, UPS load rate is constantly detected through the current monitoring system, the switching control system realizes flexible allocation of two UPS loads according to the load rate, so that the output efficiency of each UPS is maximized, on the other hand, the two UPSs are mutually redundant and standby, any one UPS can be switched to be a host UPS through a change-over switch, so that the two UPSs and a battery can run in a balanced manner, and the running efficiency of the UPSs and the service life of the battery are improved. Therefore, the system of the invention can adjust the input and the exit of the UPS or the UPS function module according to the UPS load. And when the load is heavy, part of the UPS hosts or the UPS functional modules are put into operation.
Description
Technical Field
The invention relates to the technical field of power supply configuration, in particular to an energy-saving configuration system for a UPS parallel operation segmented power supply.
Background
A UPS (Uninterruptible Power System/Uninterruptible Power Supply), i.e., an Uninterruptible Power Supply, functions to rectify ac Power into dc Power and then invert the dc Power into stable ac Power without impurities to Supply Power to a load when ac Power input is normal. In the process that the UPS supplies power to the load, the load is not in a full-load condition for a long time, but is in a changing condition according to actual needs. The output efficiency of the UPS is nonlinear with the load capacity, and the relationship can be seen in fig. 1, where it can be seen that the efficiency drops sharply when the load capacity of the UPS is less than 30%. UPS prohibits long-term overload operation.
At present, in order to ensure that a load is continuously and reliably powered, the UPS adopts redundancy configuration, and the 2 UPS and load redundancy configuration connection systems mainly include the following: (refer to DL/T1074-2007 DC and AC integrated UPS device for electric power)
1. Tandem redundant UPS configuration: (see the attached figure 2 for a configuration diagram)
The configuration of the serial standby redundant UPS is that one UPS is used as a power supply main machine to supply power to a load, the other UPS is used as a standby machine, and the output of the standby machine UPS is used as the bypass input of the host UPS. Under normal conditions, the main machine runs with load, the standby machine is in a waiting working state, and the load is zero. When the main UPS fails, the standby UPS is quickly switched to operate with load.
The configuration of the serial redundant UPS has the following disadvantages:
the standby UPS machine is in a standby state for a long time, and the battery of the standby UPS machine is in a floating charging state for a long time, so that the service life of the battery is seriously influenced.
When the load is larger than the output capacity of the UPS of the main machine, the UPS can send out an alarm signal, although the standby machine is in standby operation and has zero load carrying rate, a user also needs to cut off the excess load and then can normally operate.
2. A standby parallel standby redundant UPS configuration: (see the attached figure 3 for a configuration diagram)
The redundant UPS configuration is characterized in that the output of two UPSs is respectively used as the input of two paths of power supplies of a dual-power switch, then the power is supplied to a load through the output of the dual-power switch, the UPS which is output to a dual-power main power supply loop is a main machine, and the UPS which is output to a dual-power standby loop is a standby machine. Under normal conditions, the main machine runs with load through the dual-power switch, the standby machine is in a waiting working state, and the load is zero. When the main UPS fails, the main UPS is switched to the standby UPS to operate with load through the dual-power switch.
The one-use-one-standby parallel standby redundant UPS configuration mainly has the following disadvantages:
the standby UPS machine is in a standby state for a long time, and the battery of the standby UPS machine is in a floating charging state for a long time, so that the service life of the battery is seriously influenced.
When the load is larger than the output capacity of the UPS of the main machine, the UPS can send out an alarm signal, although the standby machine is in standby operation and has zero load carrying rate, a user also needs to cut off the excess load and then can normally operate.
3. Two redundant UPS configurations each with one section each other: (see the attached figure 4 for a configuration diagram)
The two UPS with one section for each other are configured to divide the load into two parts and the two parts are powered separately with two sections of bus. The output of each UPS of the two UPSs is respectively used as the main power input of the 1 dual-power switch and the standby power input of the other dual power. The two double-power switches are respectively provided with a section of bus to supply power to the section of load. Under the normal condition, every UPS all supplies power for this section load through this section dual switch, when one UPS broke down, on the dual switch fast switch over to the output of another UPS of trouble UPS end, another UPS drove two sections load operation through two dual switch promptly.
The two redundant UPS configurations with one section of each other mainly have the following disadvantages:
when the two loads total no more than the output capacity of a single UPS, the efficiency of the UPS drops to almost 60% or less when each load is less than 50% and less than the output capacity of a single UPS, and still two UPS's operate with one section each.
4. 1+1 parallel redundant UPS configuration: (see the attached figure 5 for a configuration diagram)
The 1+1 parallel redundant UPS configuration is that two UPSs supply power to a load simultaneously through a parallel operation function, and each UPS bears 50% load capacity. Under normal conditions, two UPS supply power to the load simultaneously, when one UPS breaks down, another UPS supplies power to all loads.
The 1+1 parallel redundant UPS configuration mainly has the following disadvantages:
when the load is less than 50% of the output capacity of a single UPS and lower, the two UPSs still share half the load and operate simultaneously, and the efficiency of the UPS is almost reduced to 60% and below. .
Disclosure of Invention
The invention aims to provide an energy-saving configuration system for a UPS parallel operation segmented power supply, so as to solve the problems in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a UPS parallel operation segmented power supply energy-saving configuration system comprises a UPS configuration system, a current monitoring system and a switching control system, wherein the UPS configuration system adopts parallel operation segmented configuration, each UPS is connected with one segment of a load, a feeder contactor and a three-phase current detection device are arranged in a connecting circuit of each UPS and the corresponding segmented load, all the connecting circuits are connected through a communication contactor,
the current detection device for the same phase and a comparator form a current comparison and summation circuit of the phase, and the current comparison circuit of the three phases forms an OR gate and then forms the current monitoring system with a relay;
the normally closed point of the feeder contactor is connected with the auxiliary normally closed point of the relay in parallel, and the auxiliary normally open point of the relay is connected with the normally closed point of the contact contactor in parallel and then connected with the change-over switch to form a switching control system.
Preferably, the UPS configuration system includes two parallel UPS, UPS1 and UPS2, wherein the output of UPS1 is connected to the input of contactor CJ1, the output of contactor CJ1 is connected to a segment of bus terminal or busbar connected to a segment of load AC1, the output of contactor CJ1 is connected to the output of contactor CJ 8538, phase a, phase B and phase C are respectively installed with current detection devices HG1, HG3 and HG5, the output of UPS2 is connected to the input of contactor CJ2, the output of contactor CJ2 is connected to a segment of bus terminal or busbar connected to a segment of load AC2, the output of contactor CJ2 is connected to a, phase B and phase C are respectively installed with current detection devices HG2, HG4 and HG6, and the segment of bus terminal or busbar is connected with the segment of bus terminal or busbar through contactor CJ 3.
Preferably, the current detection devices HG1-HG6 are composed of a precision current transformer and a voltage division terminal, and are respectively used for detecting the current of the loads carried by the UPSs 1 and 2 in real time.
Preferably, the current detection devices HG1 and HG2, HG3 and HG4, and HG5 and HG6 respectively constitute a phase a, a phase B, and a phase C sampling circuits of a load current carried by the UPS1 and a load current carried by the UPS2, the phase a, the phase B, and the phase C sampling circuits respectively constitute current summation comparison circuits with the IC1, the IC2, the IC3, and peripheral elements, and the three current summation comparison circuits form a current monitoring system with the relay J1 after passing through an or gate formed by the IC 4.
Preferably, when HG1 and HG2 sampled currents are added to each other and the current value is less than 90% of the rated output current of a single UPS, IC1 outputs a low level indicating that the phase a of a two-stage total load is no more than 90%; when HG3 and HG4 sample currents are added, and the current value is less than 90% of the rated output current of a single UPS, IC2 outputs low level, which indicates that the B phase of a two-section total load is not more than 90%; when HG5 and HG6 sample currents are added, and the current value is less than 90% of the rated output current of a single UPS, IC3 outputs low level, which indicates that the C phase of a two-stage total load is not more than 90%; when the IC1, the IC2 and the IC3 are all at low level, the total load is not more than 90% of the output capacity of a single UPS, the output of the IC4 is at low level, and the coil of the relay J1 loses power and is released; when HG1 and HG2 sample currents are added, and the current value addition is greater than 95% of the rated output current of the UPS, IC1 outputs high level, which indicates that the phase A of one two-section total load is greater than 95%; when HG3 and HG4 sample currents are added, and the current value addition is greater than 95% of the rated output current of the UPS, IC2 outputs high level, which indicates that the B phase of a two-section total load is greater than 95%; when HG5 and HG6 sample currents are added, and the current value addition is greater than 95% of the rated output current of the UPS, the IC3 outputs high level, which indicates that the C phase of a two-section total load is greater than 95%; when one of the IC1, the IC2 and the IC3 is at a high level, the total load is larger than 95% of the output capacity of the single UPS, the output of the IC4 is at a high level, and the coil of the relay J1 is electrified and attracted.
Preferably, when the load current is less than 90% of the output capacity of a single UPS, the coil of a relay J1 in the current monitoring system loses power and is released, the relay J1 assists the closing of a normally-open point J1-2 contact, the coil of a contactor CJ3 is electrified, the contactor CJ3 is closed, the CJ3 assists the opening of a normally-closed point CJ3-1, the coil of the contactor CJ2 loses power, the contactor CJ2 is opened, and after the contactor CJ3 is closed, a CJ3 main contact connects a first-stage load AC1 with a second-stage load AC 2; the CJ2 contactor is disconnected, a power output loop of the UPS2 is disconnected, and the first-stage load AC1 and the second-stage load AC2 are both supplied with power by the UPS 1; when the load current is greater than 95% of the output capacity of a single UPS, a coil of a relay J1 in the current monitoring system is electrified and closed, a J1 auxiliary normal close point J1-1 contact is opened, a coil of a contactor CJ3 loses electricity, the contactor CJ3 is opened, an auxiliary normal close point CJ3-1 of CJ3 is closed, a coil of the contactor CJ2 is electrified, the contactor CJ2 is closed, after the contactor CJ3 is opened, a CJ3 main contact disconnects a first-section load AC1 and a second-section load AC2, after the contactor CJ2 is closed, CJ2 supplies power to a second-section load AC2, and the contactor CJ1 supplies power to a first-section load AC 1.
The invention has the beneficial effects that: the UPS parallel operation segmented power supply energy-saving configuration system provided by the invention comprises a UPS configuration system, a current monitoring system and a switching control system, wherein the UPS configuration system adopts parallel operation segmented configuration, detects the UPS load rate constantly through the current monitoring system, and flexibly allocates two UPS loads according to the load rate through the switching control system, so that the output efficiency of each UPS is maximized, on the other hand, the two UPSs are mutually redundant and standby, and any one UPS can be switched to be a host UPS through a change-over switch, so that the two UPSs and batteries can run in a balanced manner, and the running efficiency of the UPSs and the service life of the batteries are improved. Therefore, the system provided by the invention can adjust the input and the exit of the UPS or the UPS function module according to the UPS load. When the UPS is in light load, part of the UPS hosts or the UPS functional modules are stopped to operate, and when the UPS is in heavy load, part of the UPS hosts or the UPS functional modules are put into operation, so that the purposes of saving energy of the UPS and improving the efficiency of the UPS are achieved.
Drawings
FIG. 1 is a schematic diagram of a UPS efficiency versus load curve;
FIG. 2 is a schematic diagram of a serial redundant configuration of UPSs;
FIG. 3 is a schematic diagram of a one-use-one-standby parallel redundant UPS configuration;
FIG. 4 is a schematic diagram of a configuration of two redundant UPSs each having a section in backup with each other;
FIG. 5 is a schematic diagram of a 1+1 parallel redundant UPS configuration;
FIG. 6 is a schematic diagram of a UPS configuration system provided by the present invention;
FIG. 7 is a schematic diagram of a current monitoring system according to the present invention;
fig. 8 is a schematic structural diagram of a handover control system according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
The main purpose of the invention is to adjust the configuration of the UPS according to the actual load rate by setting the load section by section and detecting the load change by the intelligent IC, thereby solving the problems that the service life of the battery is shortened, the load capacity is overlarge, the redundant UPS is idle, the load capacity is undersize, and two UPSs simultaneously run in low efficiency due to the long-term standby of the redundant UPS in the current UPS configuration.
As shown in fig. 6 to 8, an embodiment of the present invention provides an energy saving configuration system for a UPS parallel-operation segmented power supply, including a UPS configuration system, a current monitoring system and a switching control system, where the UPS configuration system adopts a parallel-operation segmented configuration, each UPS is connected to one segment of a load, a feeder contactor and a three-phase current detection device are disposed in a connection line between each UPS and the corresponding segmented load, all the connection lines are connected through a tie contactor,
the current detection device for the same phase and a comparator form a current comparison and summation circuit of the phase, and the current comparison circuit of the three phases forms an OR gate and then forms the current monitoring system with a relay;
the normally closed point of the feeder contactor is connected with the auxiliary normally closed point of the relay in parallel, and the auxiliary normally open point of the relay is connected with the normally closed point of the contact contactor in parallel and then connected with the change-over switch to form a switching control system.
In a preferred embodiment of the present invention, the UPS configuration system includes two parallel UPS, UPS1 and UPS2, wherein an output of UPS1 is connected to an input of contactor CJ1, an output of contactor CJ1 is connected to a segment of bus terminal or bus bar connected to a segment of load AC1, outputs a, B, and C of contactor CJ1 are respectively installed with current detection devices HG1, HG3, and HG5, an output of UPS2 is connected to an input of contactor CJ2, an output of contactor CJ2 is connected to a segment of bus terminal or bus bar connected to a segment of load AC2, outputs a, B, and C of contactor CJ2 are respectively installed with current detection devices HG2, HG4, and HG6, and the segment of bus terminal or bus bar is connected to the segment of bus terminal or bus bar through contactor CJ 3.
The current detection devices HG1-HG6 are composed of precision current transformers and voltage division terminals, and are respectively used for detecting the current of loads carried by the UPS1 and the UPS2 in real time.
The current detection devices HG1 and HG2, HG3 and HG4, HG5 and HG6 respectively form a phase A, phase B and phase C sampling circuits of a section of load current carried by the UPS1 and a section of load current carried by the UPS2, the phase A, phase B and phase C sampling circuits respectively form a current summation comparison circuit with the IC1, the IC2, the IC3 and peripheral elements, and the three current summation comparison circuits form an OR gate through the IC4 and then form a current monitoring system with the relay J1.
When HG1 and HG2 sample currents are added, and the current value is less than 90% of the rated output current of a single UPS, IC1 outputs low level, which indicates that the phase A of a two-stage total load is not more than 90%; when HG3 and HG4 sample currents are added, and the current value is less than 90% of the rated output current of a single UPS, IC2 outputs low level, which indicates that the B phase of a two-section total load is not more than 90%; when HG5 and HG6 sample currents are added, and the current value is less than 90% of the rated output current of a single UPS, IC3 outputs low level, which means that the C phase of a two-phase total load is not more than 90%. When the IC1, the IC2 and the IC3 are all at low level, the total load is not more than 90% of the output capacity of a single UPS, the output of the IC4 is at low level, and the coil of the relay J1 loses power and is released; when HG1 and HG2 sample currents are added, and the current value addition is greater than 95% of the rated output current of the UPS, IC1 outputs high level, which indicates that the phase A of one two-section total load is greater than 95%; when HG3 and HG4 sample currents are added, and the current value addition is greater than 95% of the rated output current of the UPS, IC2 outputs high level, which indicates that the B phase of a two-section total load is greater than 95%; when HG5 and HG6 sample currents are added, and the current value addition is greater than 95% of the rated output current of the UPS, the IC3 outputs high level, which indicates that the C phase of a two-section total load is greater than 95%; when one of the IC1, the IC2 and the IC3 is at a high level, the total load is larger than 95% of the output capacity of the single UPS, the output of the IC4 is at a high level, and the coil of the relay J1 is electrified and attracted.
When the load current is smaller than 90% of the output capacity of a single UPS, the coil of a relay J1 in the current monitoring system loses power and is released, the contact of a relay J1 auxiliary normally-open point J1-2 is closed, the coil of a contactor CJ3 is electrified, the contactor CJ3 is closed, the auxiliary normally-closed point CJ3-1 of CJ3 is disconnected, the coil of the contactor CJ2 loses power, the contactor CJ2 is disconnected, and after the contactor CJ3 is closed, a CJ3 main contact connects a first-section load AC1 with a second-section load AC 2; the CJ2 contactor is disconnected, a power output loop of the UPS2 is disconnected, and the first-stage load AC1 and the second-stage load AC2 are both supplied with power by the UPS 1; when the load current is greater than 95% of the output capacity of a single UPS, a coil of a relay J1 in the current monitoring system is electrified and closed, a J1 auxiliary normal close point J1-1 contact is opened, a coil of a contactor CJ3 loses electricity, the contactor CJ3 is opened, an auxiliary normal close point CJ3-1 of CJ3 is closed, a coil of the contactor CJ2 is electrified, the contactor CJ2 is closed, after the contactor CJ3 is opened, a CJ3 main contact disconnects a first-section load AC1 and a second-section load AC2, after the contactor CJ2 is closed, CJ2 supplies power to a second-section load AC2, and the contactor CJ1 supplies power to a first-section load AC 1.
When the system is used, when the load current is less than 90% of the output capacity of a single UPS, the first-stage load AC1 and the second-stage load AC2 can both provide power for the UPS1, so that the problem that the two UPSs still operate inefficiently when the load capacity is too small is effectively solved. Moreover, since the contactor CJ3 is closed and then the contactor CJ2 is opened, uninterrupted power supply of the load is guaranteed.
In addition, when the load current is greater than 95% of the output capacity of a single UPS, the contactor CJ2 supplies power to the secondary load AC2, and the contactor CJ1 supplies power to the primary load AC 1. Therefore, the problem that the redundant UPS is idle due to overlarge load is solved. Normally, the UPS1 operates as a main machine, the UPS2 operates as a redundant standby, the UPS1 can be switched to operate as a redundant standby through the change-over switch, and the UPS2 operates as a main machine, so that the problem that the service life of a battery of a long expected machine of the redundant standby machine is shortened can be effectively solved.
Therefore, the UPS load rate is constantly detected by the current monitoring system, the flexible allocation of two UPS loads is realized by the switching control system according to the load rate, so that the output efficiency of each UPS is maximized, on the other hand, the two UPSs are mutually redundant and standby, and any one UPS can be switched to be a host UPS by the change-over switch, so that the two UPSs and the battery can run in balance, and the running efficiency of the UPSs and the service life of the battery are improved.
Compared with the configuration of a serial standby redundant UPS and the configuration of a one-use one-standby parallel standby redundant UPS in the prior art, the UPS has the remarkable advantages of switching between the main machine and the standby machine, prolonging the service life of the battery of the standby machine, performing segmented operation on two UPS machines during overload and the like, and solves the problems that the service life of the standby UPS in the configuration of the serial standby redundant UPS and the configuration of the one-use one-standby parallel standby redundant UPS is shortened for a long time, and the load is required to be reduced during overload of the UPS; compared with the configuration of two redundant UPSs with sections of mutual backup and the configuration of a 1+1 parallel redundant UPS in the prior art, the UPS has the obvious advantages of flexible load allocation and high UPS operation efficiency. In the invention, the UPS operates in sections during overload and operates in a single machine during light load, thereby solving the problem that two UPS machines still operate in low efficiency during light load in the configuration of two redundant UPS with sections of mutual backup and the configuration of 1+1 parallel redundant UPS.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
When a certain power project is in three-phase line access, the total load power is 128KW, and the battery capacity meets the requirement of full-load operation for 30min after power failure, the UPS configuration is carried out by adopting the system provided by the invention, firstly, the total load power 128KW is divided into two sections for power supply according to the on-site load condition with a user, and each section of load is 64 KW. Two UPS configurations are adopted, and the capacity of each UPS needs to meet the requirement of total load power of 128KW, so that two CPS-200 types are adopted for the UPS. Each UPS outlet feeder contactor and the contact contactor are configured according to full load, and CJX1-400A alternating current contactors are adopted as the contactors.
The UPS configuration diagram can be seen in fig. 6. The structure of the current monitoring system can be seen in fig. 7, and the structure of the switching control system can be seen in fig. 8.
The load rate of the two UPSs is controlled by releasing and pulling in the contactors CJ1, CJ2 and CJ3 in the switching control system. Therefore, when the light load is carried out, part of the UPS host or the UPS functional modules stops running, and when the heavy load is carried out, part of the UPS host or the UPS functional modules is put into running, so that the purposes of energy conservation of the UPS and improvement of the UPS efficiency are achieved.
By adopting the technical scheme disclosed by the invention, the following beneficial effects are obtained: the UPS parallel operation segmented power supply energy-saving configuration system provided by the invention comprises a UPS configuration system, a current monitoring system and a switching control system, wherein the UPS configuration system adopts parallel operation segmented configuration, detects the UPS load rate constantly through the current monitoring system, and flexibly allocates two UPS loads according to the load rate through the switching control system, so that the output efficiency of each UPS is maximized, on the other hand, the two UPSs are mutually redundant and standby, and any one UPS can be switched to be a host UPS through a change-over switch, so that the two UPSs and batteries can run in a balanced manner, and the running efficiency of the UPSs and the service life of the batteries are improved. Therefore, the system provided by the invention can adjust the input and the exit of the UPS or the UPS function module according to the UPS load. When the UPS is in light load, part of the UPS hosts or the UPS functional modules are stopped to operate, and when the UPS is in heavy load, part of the UPS hosts or the UPS functional modules are put into operation, so that the purposes of saving energy of the UPS and improving the efficiency of the UPS are achieved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements should also be considered within the scope of the present invention.
Claims (4)
1. A UPS parallel operation segmented power supply energy-saving configuration system is characterized by comprising a UPS configuration system, a current monitoring system and a switching control system, wherein the UPS configuration system adopts parallel operation segmented configuration, each UPS is connected with one section of a load, a feeder contactor and a three-phase current detection device are arranged in a connecting circuit of each UPS and the corresponding segmented load, all the connecting circuits are connected through a communication contactor,
the current detection device for the same phase and a comparator form a current comparison and summation circuit of the phase, and the current comparison and summation circuit of the three phases forms an OR gate and then forms the current monitoring system with a relay;
the normally closed point of the feeder line contactor is connected with the auxiliary normally closed point of the relay in parallel, and the auxiliary normally open point of the relay is connected with the normally closed point of the contact contactor in parallel and then connected with the change-over switch to form a switching control system;
the UPS configuration system comprises two UPSs which are connected in parallel and are respectively a UPS1 and a UPS2, wherein the output of the UPS1 is connected to the input end of a contactor CJ1, the output end of the contactor CJ1 is connected to a section of bus terminal or a bus bar and is connected to a section of load AC1, the output ends A, B and C of the contactor CJ1 are respectively provided with current detection devices HG1, HG3 and HG5, the output of the UPS2 is connected to the input end of the contactor CJ2, the output end of the contactor CJ2 is connected to a section of bus terminal or a bus bar and is connected to a section of load AC2, the output ends A, B and C of the contactor CJ2 are respectively provided with current detection devices HG2, HG4 and HG6, and the section of bus terminal or the bus bar and the section of bus bar are connected through a contactor CJ 3;
when the load current is smaller than 90% of the output capacity of a single UPS, the coil of a relay J1 in the current monitoring system loses power and is released, the contact of a relay J1 auxiliary normally-open point J1-2 is closed, the coil of a contactor CJ3 is electrified, the contactor CJ3 is closed, the auxiliary normally-closed point CJ3-1 of CJ3 is disconnected, the coil of the contactor CJ2 loses power, the contactor CJ2 is disconnected, and after the contactor CJ3 is closed, a CJ3 main contact connects a first-section load AC1 with a second-section load AC 2; the CJ2 contactor is disconnected, a power output loop of the UPS2 is disconnected, and the first-stage load AC1 and the second-stage load AC2 are both supplied with power by the UPS 1; when the load current is greater than 95% of the output capacity of a single UPS, a coil of a relay J1 in the current monitoring system is electrified and closed, a J1 auxiliary normal close point J1-1 contact is opened, a coil of a contactor CJ3 loses electricity, the contactor CJ3 is opened, an auxiliary normal close point CJ3-1 of CJ3 is closed, a coil of the contactor CJ2 is electrified, the contactor CJ2 is closed, after the contactor CJ3 is opened, a CJ3 main contact disconnects a first-section load AC1 and a second-section load AC2, after the contactor CJ2 is closed, CJ2 supplies power to a second-section load AC2, and the contactor CJ1 supplies power to a first-section load AC 1.
2. The energy-saving configuration system for the UPS parallel operation segmented power supply of claim 1, wherein the current detection devices HG1-HG6 are composed of a precision current transformer and a voltage division terminal, and are respectively used for detecting the current magnitude of the loads carried by the UPS1 and the UPS2 in real time.
3. The UPS parallel operation segmented power supply energy-saving configuration system of claim 1, wherein the current detection devices HG1 and HG2, HG3 and HG4, HG5 and HG6 respectively constitute A-phase, B-phase and C-phase sampling circuits of a segment of load current carried by the UPS1 and a segment of load current carried by the UPS2, the A-phase, B-phase and C-phase sampling circuits respectively constitute current comparison and summation circuits with IC1, IC2, IC3 and peripheral elements, and the three current comparison and summation circuits form a current monitoring system with the relay J1 after being formed by an OR gate through IC 4.
4. The UPS parallel operation segmented power supply energy-saving configuration system according to claim 3, wherein when the current value is less than 90% of the rated output current of a single UPS when HG1 and HG2 are added, IC1 outputs a low level, which indicates that the A phase of a two-segment total load is not more than 90%; when HG3 and HG4 sample currents are added, and the current value is less than 90% of the rated output current of the single UPS, IC2 outputs low level to indicate that the B phase of the two-section total load is not more than 90%, and when HG5 and HG6 sample currents are added, and the current value is less than 90% of the rated output current of the single UPS, IC3 outputs low level to indicate that the C phase of the two-section total load is not more than 90%; when the IC1, the IC2 and the IC3 are all at low level, the total load is not more than 90% of the output capacity of a single UPS, the output of the IC4 is at low level, and the coil of the relay J1 loses power and is released; when HG1 and HG2 sample currents are added, and the current value addition is greater than 95% of the rated output current of the UPS, IC1 outputs high level, which indicates that the phase A of one two-section total load is greater than 95%; when HG3 and HG4 sample currents are added, and the current value addition is greater than 95% of the rated output current of the UPS, IC2 outputs high level, which indicates that the B phase of a two-section total load is greater than 95%; when HG5 and HG6 sample currents are added, and the current value addition is greater than 95% of the rated output current of the UPS, the IC3 outputs high level, which indicates that the C phase of a two-section total load is greater than 95%; when one of the IC1, the IC2 and the IC3 is at a high level, the total load is larger than 95% of the output capacity of the single UPS, the output of the IC4 is at a high level, and the coil of the relay J1 is electrified and attracted.
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| CN111541251B (en) * | 2020-04-28 | 2021-11-02 | 国家计算机网络与信息安全管理中心 | Power distribution method and system for micro bus power supply system of data machine room |
| CN113178940A (en) * | 2021-04-21 | 2021-07-27 | 中国人民解放军海军工程大学 | Automatic switching device, control system, method and application of marine uninterruptible power supply |
| CN115347661A (en) * | 2022-07-28 | 2022-11-15 | 科华数据股份有限公司 | Dormancy control method and control terminal of UPS system |
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