CN116826942A - Novel uninterruptible power supply system and control method thereof - Google Patents
Novel uninterruptible power supply system and control method thereof Download PDFInfo
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- CN116826942A CN116826942A CN202111280418.9A CN202111280418A CN116826942A CN 116826942 A CN116826942 A CN 116826942A CN 202111280418 A CN202111280418 A CN 202111280418A CN 116826942 A CN116826942 A CN 116826942A
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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
- H02J9/062—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 AC powered loads
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Abstract
The invention provides a novel uninterruptible power supply system and a control method thereof, which utilize the energy storage controlled voltage source controlled synchronous operation and the multi-power supply real-time switching control technology to realize the controlled voltage source mode support and regulate and control the conversion of different power supplies in real time, complete the power supply switching function of the near-zero millisecond uninterruptible power supply, abandon the conventional technical means of twice power conversion, break the system architecture fixed mode of the prior art scheme, innovate the uninterruptible power supply which adopts the controlled voltage source converter energy storage system connected in parallel at the load input end of the power supply, realize the regulation and control of the online switching of different power supplies and the continuous support, change the resource waste and the economic burden caused by the two-stage conversion of the prior UPS uninterruptible power supply, become the hematopoietic machine for realizing the power peak regulation and revenue generation, effectively solve the defects of the prior art application and the system architecture, and provide the beneficial effects of energy conservation, high efficiency and revenue generation for the data center and the power load requiring the uninterruptible power supply.
Description
Technical Field
The invention belongs to the technical field of uninterruptible power supply, and particularly relates to a novel uninterruptible power supply system and a control method thereof.
Background
With the progress of human society and the technological development of modernization and informatization, various industries and people's life and work are not separated from the need for electric power, and in particular, stable and uninterrupted power supply is required. Under the condition that the current power grid supplies power for users in an alternating current mode, the uninterrupted power supply technical means still adopts a UPS uninterrupted power supply system. In contrast, the fifth printing plate in 2021 of the green data center power supply system published by the scientific press, the heavy printing plate in 2020 of the bank data center infrastructure construction and operation and maintenance management published by the mechanical industry press, the third printing plate in 2020 of the data center hot spot technical analysis published by the people's post and telecommunications press, and the third printing plate in 2021 of the UPS power supply technology and application published by the chemical industry press; the above publications all disclose the technical solution of UPS uninterruptible power supply systems in detail, and explicitly point out that in the case that the existing power grid supplies power to an ac power grid, the data center, the place where uninterruptible power supply is needed, and the power load are basically connected with ac power, where the main sources of power supply are ac power supplied by the power grid and ac power supplied by a backup diesel generator, and when different ac power supplies need to be converted, the frequency and phase inconsistency can cause faults and power failure conditions in the switching process of different power supply systems and the risk of accidents.
Therefore, when the power supply fails and different power supplies are converted, the failed power supply is converted into another standby power supply through the STS power supply conversion switch which is turned on after being turned off, the power supply is interrupted during the power supply conversion, the power consumption requirements of the data center and the power consumption load which needs uninterrupted power supply scene cannot be met, the risk that the load equipment stops running due to temporary power failure exists, and unnecessary and immeasurable loss is caused.
For this reason, the UPS uninterruptible power supply system of the related art is widely used. However, the UPS uninterrupted power supply system generates power loss of two times of conversion through two times of power conversion from alternating current to direct current and vice versa; meanwhile, in the alternating current-direct current-alternating current process of the UPS uninterrupted power supply system in the prior art, a battery system is hung on the direct current side and used as standby electric energy, the battery system needs to be maintained and charged in a floating mode, a large amount of manpower and material resource is occupied, and the battery system becomes a zombie asset consuming resources in a long-term standby period. Therefore, industry attempts to change the current situation and improve the technology and system, but the UPS uninterruptible power supply system scheme and system architecture mainly adopting ac-to-dc and dc-to-ac power conversion are still adopted at present.
Disclosure of Invention
In order to solve the application problem of the uninterruptible power supply system and the defects of the system architecture, the invention provides a novel uninterruptible power supply system and a control method thereof, which mainly comprise the following steps: the device comprises a controlled voltage source bidirectional converter unit, an energy storage battery unit, a power supply side electric parameter sampling circuit, a monitoring communication line, an electric load, a power supply line, a battery management system, a battery monitoring wiring harness, a converter communication line, an upper computer management system, an upper computer communication line, a power supply power line on-off switch, a load side power supply parameter sampling circuit, a controlled power switch and a direct current switch and protection circuit;
the power supply is connected with a power load through a power supply line connected with a power line on-off switch of the power supply, and a power path for supplying power to the load by the power supply is formed;
meanwhile, the controlled voltage source bidirectional converter unit is connected in parallel to a power supply power line at the load side of an on-off switch of a power supply power line through a controlled power switch, and forms a power path for supplying uninterrupted power to a power load and charging and discharging a power supply and the load connected with the power supply power line through an energy storage battery unit;
the controlled voltage source bidirectional converter unit is respectively connected with the power supply side electric parameter sampling circuit, the load side electric parameter sampling circuit and the power supply side electric parameter sampling circuit on the power supply line on-off switch power supply side, and then is respectively connected with the power supply side electric parameter sampling circuit, the power supply line on-off switch and the load side electric parameter sampling circuit through the monitoring communication line to form a communication link for monitoring and judging and controlling the seamless switching of the controlled voltage source bidirectional converter unit to provide uninterrupted power supply for the load and control the power supply;
the operation control method of the novel uninterruptible power supply system comprises the following steps:
step 100: the controlled voltage source bidirectional converter unit monitors the voltage and the frequency of the power supply through a power supply side electrical parameter sampling circuit (4) and keeps synchronous operation;
step 101: is the voltage and frequency of the power supply source to monitor in real time within the normal allowable range? Yes, execution 111, otherwise, execution 121;
step 111: the controlled voltage source bidirectional converter unit tracks the voltage and frequency of the power supplied by the power supply source and synchronously operates;
step 112: monitoring whether a control instruction sent by an upper computer management and control system exists or not in real time, if so, executing 113, otherwise executing 101;
step 113: the controlled voltage source bidirectional converter unit executes a control instruction sent by the upper computer control system, and starts to run from 101 after executing the control instruction;
step 121: the controlled voltage source bidirectional converter unit controls the on-off switch of the power line of the power supply to break through the monitoring communication line, cuts off the power supply connection path of the power supply and continuously and independently operates to supply power to the power utilization load continuously;
step 122: monitoring whether a control instruction sent by an upper computer management and control system exists in real time, if so, executing 113, otherwise executing 123;
step 123: the controlled voltage source bidirectional converter unit monitors whether the power supply is recovered to normal power supply or not in real time through the power supply side electric parameter sampling circuit, if yes, the step 124 is executed, and otherwise, the step 121 is executed;
step 124: the controlled voltage source bidirectional converter unit monitors the voltage and the frequency and the phase of the power supply through the power supply side power supply parameter sampling circuit, and monitors the frequency and the phase of the power load through the load side power supply parameter sampling circuit, and the controlled voltage source bidirectional converter unit slowly adjusts the frequency and the phase of the output power in real time so that the frequency and the phase of the output power are synchronous with each other;
step 125: in the process of adjusting the frequency and the phase, the controlled voltage source bidirectional converter unit monitors the frequency and the phase of the power supply through the power supply side electric parameter sampling circuit in real time, compares the frequency and the phase of the power supply with the frequency and the phase of the power consumption load monitored through the load side power supply parameter sampling circuit, detects whether the frequency and the phase are synchronous, if yes, then the operation 126 is executed, otherwise, the operation 124 is executed;
step 126: the controlled voltage source bidirectional converter unit controls the on-off switch of the power supply power line to be closed through the monitoring communication line, the power supply power is supplied to the power utilization load through the on-off switch of the power supply power line and the power supply power line, and meanwhile the controlled voltage source bidirectional converter unit and the power supply synchronously operate.
The novel uninterrupted power supply system and the control method thereof are characterized in that the controlled voltage source bidirectional converter unit has a virtual synchronous machine operation function, and independently monitors a power supply line on-off switch of a power supply connected with a control power supply line in real time.
The novel uninterruptible power supply system and the control method thereof are characterized in that the battery management system is connected with an energy storage battery unit through a battery monitoring wire harness, and is connected with a controlled voltage source bidirectional converter unit through a converter communication wire at the same time to form a dynamic monitoring management system of the battery unit.
The novel uninterruptible power supply system and the control method thereof are characterized in that an energy storage battery unit connected with a battery management system is connected with a controlled voltage source bidirectional converter unit through a direct current switch and a protection circuit to form the battery energy storage and power supply system for providing uninterruptible power supply supporting power for switching and conversion of a power supply.
The novel uninterrupted power supply system and the control method thereof are characterized in that the upper computer management and control system is respectively connected with the battery management system, the controlled voltage source bidirectional converter unit and the controlled power switch through upper computer communication lines to form the management and control system for the whole safe operation of the novel uninterrupted power supply system.
The invention provides a novel uninterruptible power supply system and a control method thereof, which utilize the energy storage controlled voltage source controlled synchronous operation and the multi-power supply real-time switching control technology to realize the controlled voltage source mode support and regulate and control the conversion of different power supplies in real time, save a power supply switching switch of a cut-off-before-turn-on STS power supply, complete the power supply switching function of near zero millisecond uninterruptible power supply, abandon the conventional technical means of twice power conversion and break the system architecture fixed type of the prior art scheme, innovate the uninterruptible power supply which adopts the regulation and control of the on-line switching of different power supplies and continuous support by connecting the controlled voltage source converter energy storage system with the load input end of the power supply, and the electric energy regulating function which is controlled to carry out charging and discharging, change the technical scheme of the existing UPS uninterruptible power supply and the burden situation that the UPS battery energy storage becomes a dead body asset, become hematopoietic machines for realizing power peak regulation and revenue generation, effectively solve the problems of the prior art and system architecture, and provide the beneficial effects of energy saving, high efficiency and revenue generation for a data center and a power load which needs uninterruptible power supply.
Drawings
Fig. 1 is a schematic diagram of a system architecture formed by a novel uninterruptible power supply system.
Fig. 2 is a control method and a flowchart of a novel uninterruptible power supply system.
Detailed Description
As an example, a novel uninterruptible power supply system and a control method thereof are described with reference to the accompanying drawings, but the described embodiments are some, but not all, embodiments in which the present invention is applied to a novel uninterruptible power supply system and a control method thereof. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. The technique and scheme of the present invention are not limited to those given in the present embodiment example.
As shown in fig. 1, a novel uninterruptible power supply system and a control method thereof mainly include: the device comprises a controlled voltage source bidirectional converter unit (1), an energy storage battery unit (2), a power supply (3), a power supply side electric parameter sampling circuit (4), a monitoring communication line (5), an electric load (6), a power supply power line (7), a battery management system (8), a battery monitoring wire harness (9), a converter communication line (10), an upper computer management system (11), an upper computer communication line (12), a power supply power line on-off switch (13), a load side power supply parameter sampling circuit (14), a controlled power switch (15) and a direct current switch and protection circuit (16);
the power supply (3) is connected with an electric load (6) through a power supply power line (7) connected with a power supply power line on-off switch (14) to form a power path for supplying power to the load by the power supply;
meanwhile, the controlled voltage source bidirectional converter unit (1) is connected in parallel with a power supply power line (7) connected with the load side of a power supply power line on-off switch (14) through a controlled power switch (15) to form a power path for supplying uninterrupted power to a power supply load (6) and charging and discharging a power supply connected with the power supply power line (7) and the load through an energy storage battery unit (2);
the controlled voltage source bidirectional converter unit (1) is respectively connected with a power supply side electric parameter sampling circuit (4) at a power supply side of a power supply power line on-off switch (14) connected with a power supply power line (7), is connected with a load side electric parameter sampling circuit (14) at a load side of the power supply power line on-off switch (14), and is respectively connected with the power supply side electric parameter sampling circuit (4), the power supply power line on-off switch (14) and the load side electric parameter sampling circuit (14) through a monitoring communication line (5) by the controlled voltage source bidirectional converter unit (1), so that a communication link for uninterrupted power supply and seamless switching monitoring, judgment and management control of a control power supply is formed for the load by the controlled voltage source bidirectional converter unit (1);
the operation control method of the novel uninterruptible power supply system comprises the following steps:
step 100: the controlled voltage source bidirectional converter unit (1) monitors the voltage and the frequency of the power supply (3) through the power supply side electric parameter sampling circuit (4) and keeps synchronous operation;
step 101: is the voltage and frequency of the power supplied by the power supply source (3) monitored in real time within the normal allowable range? Yes, execution 111, otherwise, execution 121;
step 111: the controlled voltage source bidirectional converter unit (1) tracks the voltage and the frequency of the power supplied by the power supply (3) and synchronously operates;
step 112: monitoring whether a control instruction sent by an upper computer management and control system (11) exists or not in real time, if so, executing 113, otherwise executing 101;
step 113: the controlled voltage source bidirectional converter unit (1) executes a control instruction sent by the upper computer control system (11), and starts to run from 101 after executing;
step 121: the controlled voltage source bidirectional converter unit (1) controls the on-off switch (13) of the power line of the power supply to open through the monitoring communication line (5), cuts off the power supply connection path of the power supply (3), and continuously and independently operates to supply power to the power utilization load (6) continuously;
step 122: monitoring whether a control instruction sent by an upper computer management and control system (11) exists or not in real time, if so, executing 113, otherwise executing 123;
step 123: the controlled voltage source bidirectional converter unit (1) monitors whether the power supply (3) is recovered to normal power supply or not in real time through the power supply side electric parameter sampling circuit (4), if yes, the step 124 is executed, and if not, the step 121 is executed;
step 124: the controlled voltage source bidirectional converter unit (1) monitors the voltage, the frequency and the phase of the power supply (3) through the power supply side electric parameter sampling circuit (4), and simultaneously monitors the frequency and the phase of the power consumption load (6) through the load side power supply parameter sampling circuit (14), and the controlled voltage source bidirectional converter unit (1) slowly adjusts the frequency and the phase of the output power in real time so that the frequency and the phase of the output power are synchronous with the frequency and the phase of the power supply (3);
step 125: in the process of adjusting the frequency and the phase, the controlled voltage source bidirectional converter unit (1) monitors the frequency and the phase of the power supply (3) through the power supply side electric parameter sampling circuit (4) in real time, compares the frequency and the phase of the power utilization load (6) monitored through the load side power supply parameter sampling circuit (14), detects whether the frequency and the phase are synchronous, if yes, then the operation is performed 126, otherwise, the operation is performed 124;
step 126: the controlled voltage source bidirectional converter unit (1) controls the on-off switch (13) of the power supply power line to be closed through the monitoring communication line (5), the power supply power source (3) supplies power to the power utilization load (6) through the on-off switch (13) of the power supply power line and the power supply power line (7), and meanwhile the controlled voltage source bidirectional converter unit (1) and the power supply power source (3) synchronously operate.
The novel uninterruptible power supply system and the control method thereof are characterized in that the controlled voltage source bidirectional converter unit (1) has a virtual synchronous machine operation function and independently monitors a power supply line on-off switch (13) for connecting a power supply and a control power supply line (7) in real time.
The novel uninterruptible power supply system and the control method thereof are characterized in that a battery management system (8) is connected with an energy storage battery unit (2) through a battery monitoring wire harness (9), and is connected with a controlled voltage source bidirectional converter unit (1) through a converter communication wire (10) at the same time to form a dynamic monitoring management system of the battery unit.
The novel uninterruptible power supply system and the control method thereof are characterized in that an energy storage battery unit (2) connected with a battery management system (8) is connected with a controlled voltage source bidirectional converter unit (1) through a direct current switch and a protection circuit (16), and the novel uninterruptible power supply system is a battery energy storage and power supply system for providing uninterruptible power supply support power for switching and conversion of a power supply.
The novel uninterrupted power supply system and the control method thereof are characterized in that an upper computer management and control system (11) is respectively connected with a battery management system (8), a controlled voltage source bidirectional converter unit (1) and a controlled power switch (15) through an upper computer communication line (12), so that the overall safe operation management and control system of the novel uninterrupted power supply system is formed.
The invention provides a novel uninterruptible power supply system and a control method thereof, which utilize the synchronous operation of an energy storage controlled voltage source and the real-time switching control technology of multiple power supplies to realize the support of the controlled voltage source mode and uninterrupted regulation and control of the conversion of different power supplies, save a STS power supply change-over switch which is switched on and off before completing the power supply switching function of the near zero millisecond uninterruptible power supply, abandon the conventional technical means and break through the system architecture setting of the prior art scheme, innovate the adoption of the energy storage system of a controlled voltage source converter connected in parallel with the load input end of the power supply, realize the uninterrupted power supply of the regulation and continuous support of different power supplies, and the electric regulation function of controlling the electric peak regulation and frequency regulation, change the technical scheme of the two-stage conversion of the conventional UPS and the burden situation that the energy storage of UPS battery becomes a dead body asset, lead the energy storage part of the novel uninterruptible power supply system to become a hematopoietic machine for peak regulation, frequency regulation and revenue generation, effectively solve the problems of the application of the prior art and the system architecture, and provide the energy saving, high efficiency and revenue generation effects for a data center and a consumer load requiring uninterruptible power supply.
The system structure, the organization relation and the control method of the novel uninterruptible power supply system are provided, but the configuration of the novel uninterruptible power supply system and the battery energy storage unit system and the internal structure thereof are not limited to the corresponding components, such as the configuration of a battery string monitoring device, the type of an energy storage unit and the like, which form the energy storage unit system with the same function.
Specific embodiments are given above, but the invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various modifications, formulas, and parameters can be devised in accordance with the principles and concepts of the invention without the need for inventive faculty, and variations, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and concepts of the invention.
Claims (5)
1. A novel uninterruptible power supply system and a control method thereof mainly comprise: the device comprises a controlled voltage source bidirectional converter unit, an energy storage battery unit, a power supply side electric parameter sampling circuit, a monitoring communication line, an electric load, a power supply line, a battery management system, a battery monitoring wiring harness, a converter communication line, an upper computer management system, an upper computer communication line, a power supply power line on-off switch, a load side power supply parameter sampling circuit, a controlled power switch and a direct current switch and protection circuit;
the power supply is connected with a power load through a power supply line connected with a power line on-off switch of the power supply, and a power path for supplying power to the load by the power supply is formed;
meanwhile, the controlled voltage source bidirectional converter unit is connected in parallel to a power supply power line at the load side of an on-off switch of a power supply power line through a controlled power switch, and forms a power path for supplying uninterrupted power to a power load and charging and discharging a power supply and the load connected with the power supply power line through an energy storage battery unit;
the controlled voltage source bidirectional converter unit is respectively connected with the power supply side electric parameter sampling circuit, the load side electric parameter sampling circuit and the power supply side electric parameter sampling circuit on the power supply line on-off switch power supply side, and then is respectively connected with the power supply side electric parameter sampling circuit, the power supply line on-off switch and the load side electric parameter sampling circuit through the monitoring communication line to form a communication link for monitoring and judging and controlling the seamless switching of the controlled voltage source bidirectional converter unit to provide uninterrupted power supply for the load and control the power supply;
the operation control method of the novel uninterruptible power supply system comprises the following steps:
step 100: the controlled voltage source bidirectional converter unit monitors the voltage and the frequency of the power supply through a power supply side electrical parameter sampling circuit (4) and keeps synchronous operation;
step 101: is the voltage and frequency of the power supply source to monitor in real time within the normal allowable range? Yes, execution 111, otherwise, execution 121;
step 111: the controlled voltage source bidirectional converter unit tracks the voltage and frequency of the power supplied by the power supply source and synchronously operates;
step 112: monitoring whether a control instruction sent by an upper computer management and control system exists or not in real time, if so, executing 113, otherwise executing 101;
step 113: the controlled voltage source bidirectional converter unit executes a control instruction sent by the upper computer control system, and starts to run from 101 after executing the control instruction;
step 121: the controlled voltage source bidirectional converter unit controls the on-off switch of the power line of the power supply to break through the monitoring communication line, cuts off the power supply connection path of the power supply and continuously and independently operates to supply power to the power utilization load continuously;
step 122: monitoring whether a control instruction sent by an upper computer management and control system exists in real time, if so, executing 113, otherwise executing 123;
step 123: the controlled voltage source bidirectional converter unit monitors whether the power supply is recovered to normal power supply or not in real time through the power supply side electric parameter sampling circuit, if yes, the step 124 is executed, and otherwise, the step 121 is executed;
step 124: the controlled voltage source bidirectional converter unit monitors the voltage and the frequency and the phase of the power supply through the power supply side power supply parameter sampling circuit, and monitors the frequency and the phase of the power load through the load side power supply parameter sampling circuit, and the controlled voltage source bidirectional converter unit slowly adjusts the frequency and the phase of the output power in real time so that the frequency and the phase of the output power are synchronous with each other;
step 125: in the process of adjusting the frequency and the phase, the controlled voltage source bidirectional converter unit monitors the frequency and the phase of the power supply through the power supply side electric parameter sampling circuit in real time, compares the frequency and the phase of the power supply with the frequency and the phase of the power consumption load monitored through the load side power supply parameter sampling circuit, detects whether the frequency and the phase are synchronous, if yes, then the operation 126 is executed, otherwise, the operation 124 is executed;
step 126: the controlled voltage source bidirectional converter unit controls the on-off switch of the power supply power line to be closed through the monitoring communication line, the power supply power is supplied to the power utilization load through the on-off switch of the power supply power line and the power supply power line, and meanwhile the controlled voltage source bidirectional converter unit and the power supply synchronously operate.
2. The novel uninterruptible power supply system and the control method thereof according to claim 1, wherein the controlled voltage source bidirectional converter unit has a virtual synchronous machine operation function and independently monitors a power supply line on-off switch of a power supply connected with a control power supply line in real time.
3. The novel uninterruptible power supply system and the control method thereof according to claim 1 are characterized in that the battery management system is connected with the energy storage battery unit through a battery monitoring wire harness and is connected with the controlled voltage source bidirectional converter unit through a converter communication wire at the same time to form a dynamic monitoring management system of the battery unit.
4. The novel uninterruptible power supply system and the control method thereof according to claim 1 are characterized in that an energy storage battery unit connected with a battery management system is connected with a controlled voltage source bidirectional converter unit through a direct current switch and a protection circuit to form a battery energy storage and power supply system for providing uninterruptible power supply support power for switching and conversion of a power supply.
5. The novel uninterruptible power supply system and the control method thereof according to claim 1 are characterized in that the upper computer management and control system is respectively connected with the battery management system, the controlled voltage source bidirectional converter unit and the controlled power switch through upper computer communication lines to form the management and control system for the whole safe operation of the novel uninterruptible power supply system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111280418.9A CN116826942A (en) | 2021-11-02 | 2021-11-02 | Novel uninterruptible power supply system and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111280418.9A CN116826942A (en) | 2021-11-02 | 2021-11-02 | Novel uninterruptible power supply system and control method thereof |
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| Publication Number | Publication Date |
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| CN116826942A true CN116826942A (en) | 2023-09-29 |
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| CN202111280418.9A Pending CN116826942A (en) | 2021-11-02 | 2021-11-02 | Novel uninterruptible power supply system and control method thereof |
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