CN113644733B - Scheduling method for temporary power utilization seamless switching and power supply device - Google Patents
Scheduling method for temporary power utilization seamless switching and power supply device Download PDFInfo
- Publication number
- CN113644733B CN113644733B CN202111200673.8A CN202111200673A CN113644733B CN 113644733 B CN113644733 B CN 113644733B CN 202111200673 A CN202111200673 A CN 202111200673A CN 113644733 B CN113644733 B CN 113644733B
- Authority
- CN
- China
- Prior art keywords
- power
- energy storage
- storage battery
- assembly
- power generation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004146 energy storage Methods 0.000 claims abstract description 189
- 238000010248 power generation Methods 0.000 claims abstract description 185
- 239000003921 oil Substances 0.000 claims description 34
- 239000000295 fuel oil Substances 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 4
- 239000013589 supplement Substances 0.000 claims description 4
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 230000002457 bidirectional effect Effects 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/08—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 requiring starting of a prime-mover
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a scheduling method and a power supply device for temporary power utilization seamless switching, which comprises the steps of obtaining temporary power load power required by a terminal load; determining a power supply mode according to the critical load power: when the temporary load power is not greater than the power supply power of the energy storage battery assembly, switching to an off-grid power supply mode; when the temporary load power is in the range of the sum power of the power supply power of the energy storage battery assembly, the power supply power of the energy storage battery assembly and the power supply power of the main power generation assembly, switching to a grid-connected power supply mode; when the power of the temporary load is larger than the sum power of the power supply power of the energy storage battery assembly and the power supply power of the main power generation assembly, the parallel operation power supply mode is switched, and at the moment, the auxiliary power generation assembly, the main power generation assembly and the energy storage battery assembly are adopted for parallel operation power supply. The scheduling method for the temporary power utilization seamless switching achieves the effect of self-adaptive seamless switching no matter how the terminal load changes through reasonable allocation.
Description
Technical Field
The invention relates to the technical field of micro-grids, temporary power utilization and commercial power protection, in particular to a scheduling method for seamless switching of temporary power utilization. The invention also relates to a temporary power utilization and supply device.
Background
With the gradual development of the energy storage technology and the micro-grid technology, the diesel storage power supply system can effectively improve the efficiency of the diesel generator, and becomes a new development direction in the field of temporary power supply.
Currently, the problem of supplying power is solved by means of diesel generators, which are manually operated to increase or decrease the number of diesel generators in the diesel storage system to match the power required by the end load. However, because the field electrical load changes greatly, the start-stop work of the generator is scheduled or the power of the generator is adjusted by manual operation to realize the matching with the load terminal, the efficiency of the oil engine is difficult to be improved, the power generation oil consumption is difficult to be reduced, the maximum utilization efficiency of the fuel oil generator is difficult to be ensured, and the energy waste is caused.
Disclosure of Invention
The invention provides a scheduling method for seamless switching of temporary power utilization, which aims to solve the technical problem that the maximum utilization efficiency of a fuel generator is difficult to ensure due to the fact that the starting and stopping work of the generator is scheduled or the power of the generator is adjusted to be matched with a load terminal by manual operation in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a scheduling method for temporary power utilization seamless switching comprises the following steps: acquiring temporary load power required by a terminal load; determining a power supply mode according to the critical load power: when the temporary load power is not greater than the power supply power of the energy storage battery assembly, switching to an off-grid power supply mode, supplying power by using the energy storage battery assembly, and starting the main power generation assembly or the auxiliary power generation assembly to charge the energy storage battery assembly if the charge state of the energy storage battery assembly reaches a preset lower limit value; if the state of charge of the energy storage battery assembly reaches a preset upper limit value, closing the main power generation assembly or the auxiliary power generation assembly to stop charging the energy storage battery assembly; when the temporary load power is in the range of the sum power of the power supply power of the energy storage battery assembly, the power supply power of the energy storage battery assembly and the power supply power of the main power generation assembly, switching to a grid-connected power supply mode, and at the moment, adopting the energy storage battery assembly and the main power generation assembly for grid-connected power supply; when the temporary load power is larger than the sum power of the power supply power of the energy storage battery assembly and the power supply power of the main power generation assembly, switching to a parallel operation power supply mode, and at the moment, adopting an auxiliary power generation assembly, the main power generation assembly and the energy storage battery assembly to perform parallel operation power supply; the method comprises the steps of obtaining rated power consumption of a main power generation assembly in a full oil state, obtaining total power generation power consumption of the main power generation assembly in a preset time period after the main power generation assembly is filled with oil, determining the current residual oil quantity of the main power generation assembly according to a preset scheme, the total power generation power consumption and the rated power consumption, judging whether the current residual oil quantity is smaller than a target residual oil quantity or not, and sending prompt information of fuel oil supplement when the current residual oil quantity is smaller than the target residual oil quantity; acquiring the charge state of the energy storage battery assembly at a first target time point, and charging the energy storage battery assembly by adopting a main power generation assembly or an auxiliary power generation assembly if the charge state of the energy storage battery assembly does not reach a preset upper limit value; and if the state of charge of the energy storage battery assembly reaches a preset upper limit value, controlling the main power generation assembly or the auxiliary power generation assembly to stop charging the energy storage battery assembly.
Further, when the power of the temporary electric load is greater than the sum power of the power supply power of the energy storage battery assembly and the power supply power of the main power generation assembly, the parallel operation power supply mode is switched to, and the parallel operation power supply of the auxiliary power generation assembly, the main power generation assembly and the energy storage battery assembly at the moment comprises the following steps: when the temporary load power is between the power supply power of the energy storage battery assembly and the power supply power of the main power generation assembly, switching to a grid-connected charging power supply mode, wherein the main power generation assembly is adopted to supply power to the terminal load and charge the energy storage battery assembly, and if the charge state of the energy storage battery assembly reaches a preset upper limit value, stopping supplying power to the energy storage battery assembly; when the temporary load power is between the power of the energy storage battery assembly and the sum power of the energy storage battery assembly and the power of the main power generation assembly, switching to a grid-connected discharging power supply mode, performing parallel operation on the main power generation assembly, the auxiliary power generation assembly and the energy storage battery assembly to supply power, and controlling to start the auxiliary power generation assembly to charge the energy storage battery assembly if the charge state of the energy storage battery assembly reaches a preset lower limit value; and if the state of charge of the energy storage battery assembly reaches a preset upper limit value, controlling to close the auxiliary power generation assembly to stop supplying power to the energy storage battery assembly.
Further, when the power of the temporary load is larger than the sum of the power supply power of the energy storage battery assembly and the power supply power of the main power generation assembly, switching to a parallel operation power supply mode, at the moment, adopting an auxiliary power generation assembly, the main power generation assembly and the energy storage battery assembly to perform parallel operation power supply, and controlling the main power generation assembly or the auxiliary power generation assembly to charge the energy storage battery assembly if the charge state of the energy storage battery assembly does not reach a preset upper limit value; and if the state of charge of the energy storage battery assembly does not reach the preset upper limit value, controlling the main power generation assembly or the auxiliary power generation assembly to stop charging the energy storage battery assembly.
Further, the auxiliary power generation assembly comprises a plurality of auxiliary diesel generators with different powers, and when the power of the temporary electric load is greater than the sum power of the power supply power of the energy storage battery assembly and the power supply power of the main power generation assembly, the auxiliary power generation assembly is switched to a parallel operation power supply mode, and the parallel operation power supply of the auxiliary power generation assembly, the main power generation assembly and the energy storage battery assembly comprises: when the power of the temporary electric load is larger than the sum power of the power supply power of the energy storage battery assembly and the power supply power of the main power generation assembly, switching to a parallel operation power supply mode, and determining a single auxiliary diesel generator or a plurality of auxiliary diesel generators combined in parallel according to the difference power between the power of the temporary electric load and the sum power of the energy storage battery assembly and the power of the main power generation assembly, wherein the single auxiliary diesel generator or the plurality of auxiliary diesel generators are correspondingly required to meet the parallel operation.
Further, the energy storage battery assembly comprises a lithium iron phosphate battery.
The invention also provides a temporary power utilization and supply device, which comprises an energy management system, an energy storage battery assembly, a main power generation assembly, an auxiliary power generation assembly and a bidirectional energy storage converter, wherein the bidirectional energy storage converter is electrically connected with a terminal load; the energy management system is used for acquiring the temporary power load power required by the terminal load and determining a power supply mode according to the temporary power load power, wherein the power supply mode comprises an off-grid power supply mode, a grid-connected power supply mode and a parallel-connected power supply mode; when the off-grid power supply mode is adopted, the energy storage battery assembly is adopted for supplying power, and if the state of charge of the energy storage battery assembly reaches a preset lower limit value, the main power generation assembly or the auxiliary power generation assembly is started to charge the energy storage battery assembly; if the state of charge of the energy storage battery assembly reaches a preset upper limit value, closing the main power generation assembly or the auxiliary power generation assembly to stop charging the energy storage battery assembly; when the grid-connected power supply mode is adopted, the energy storage battery assembly and the main power generation assembly are adopted for grid-connected power supply; and when the power supply mode is in the parallel operation power supply mode, the auxiliary power generation assembly, the main power generation assembly and the energy storage battery assembly are adopted for parallel operation power supply.
The invention has the following beneficial effects:
according to the scheduling method for the seamless switching of the temporary power utilization, the energy storage battery assembly, the main power generation assembly and the auxiliary power generation assembly are matched with each other in a cooperative mode through monitoring the temporary power load power required by the terminal load in real time, so that the power supply power required by the temporary load is matched in a self-adaptive mode, and the technical problems that in the existing temporary power utilization occasion, a plurality of generators are started to work under the heavy load condition to meet the construction requirement, and the generators cannot adapt to the change of the temporary load when the power required by the temporary load is reduced, so that the energy is wasted are solved. The invention fully utilizes the discharge characteristic of 1 to 2 times of nominal capacity of the energy storage battery assembly and the characteristic of instantaneous impact resistance, combines the characteristics with a short plate which has slow starting time of a generator and continuously consumes fuel oil, and achieves the effect of self-adaptive seamless switching no matter how the terminal load changes through reasonable allocation.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flow chart illustrating a scheduling method of temporary seamless power utilization switching according to a preferred embodiment of the present invention;
fig. 2 is a schematic structural diagram of a temporary power consumption unpowered device according to a preferred embodiment of the invention.
Illustration of the drawings:
10. an energy management system; 20. an energy storage battery assembly; 30. a main power generation assembly; 40. an auxiliary power generation assembly; 50. a bidirectional energy storage converter.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the accompanying drawings, but the invention can be embodied in many different forms, which are defined and covered by the following description.
Fig. 1 is one of schematic structural diagrams of a scheduling method for temporary seamless power utilization handover according to a preferred embodiment of the present invention; fig. 2 is a second schematic structural diagram of a scheduling method for temporary seamless power utilization handover according to a preferred embodiment of the present invention.
As shown in fig. 1 and fig. 2, the scheduling method for temporary seamless power utilization switching of the present embodiment includes the following steps: acquiring temporary load power required by a terminal load; determining a power supply mode according to the critical load power: when the temporary load power is not greater than the power supply power of the energy storage battery assembly 20, switching to an off-grid power supply mode, supplying power by using the energy storage battery assembly 20, and starting the main power generation assembly 30 or the auxiliary power generation assembly 40 to charge the energy storage battery assembly 20 if the state of charge of the energy storage battery assembly 20 reaches a preset lower limit value; if the state of charge of the energy storage battery assembly 20 reaches the preset upper limit value, the main power generation assembly 30 or the auxiliary power generation assembly 40 is turned off to stop charging the energy storage battery assembly 20; when the temporary load power is in the range of the sum power of the power supply power of the energy storage battery assembly 20, the power supply power of the energy storage battery assembly 20 and the power supply power of the main power generation assembly 30, switching to a grid-connected power supply mode, and at the moment, grid-connected power supply is carried out by adopting the energy storage battery assembly 20 and the main power generation assembly 30; when the temporary load power is greater than the sum of the power supply power of the energy storage battery assembly 20 and the power supply power of the main power generation assembly 30, the parallel operation power supply mode is switched, and at this time, the auxiliary power generation assembly 40, the main power generation assembly and the energy storage battery assembly 20 are adopted to perform parallel operation power supply.
According to the scheduling method for the seamless switching of the temporary power utilization, the energy storage battery assembly 20, the main power generation assembly 30 and the auxiliary power generation assembly 40 are matched with each other in a coordinated mode through monitoring the temporary power load power required by the terminal load in real time, so that the power supply power required by the temporary load is matched in a self-adaptive mode, and the technical problems that in the existing temporary power utilization occasion, a plurality of generators are started to work under the heavy load condition to meet the construction requirement, and the generators cannot adapt to the change of the temporary load when the power required by the temporary load is reduced, so that the energy is wasted are solved. The invention fully utilizes the discharge characteristic of 1 to 2 times of nominal capacity of the energy storage battery assembly 20 and the characteristic of instantaneous impact resistance, combines the characteristics with the short plate that the starting time of the generator is slow and the fuel is continuously consumed, and achieves the effect of self-adaptive seamless switching no matter how the terminal load changes through reasonable allocation.
Optionally, before determining the power supply mode according to the critical load power, acquiring the power supply power of the energy storage battery assembly.
It can be understood that, in the scheduling method for the temporary seamless power utilization switching provided by the invention, by adopting the optimization control, under the condition of a small load (when the power of the temporary load changes to be not more than the power supply power of the energy storage battery assembly 20), the energy management system 10 controls the energy storage converter to independently work off the grid; under the condition that the state of charge (SOC) of the energy storage battery assembly 20 is too low or the load is large (the critical load power is in a range between the supply power of the energy storage battery assembly 20 and the sum of the supply power of the energy storage battery assembly 20 and the supply power of the main power generation assembly 30), the energy management system 10 schedules the main power generation assembly 30 or the auxiliary power generation assembly 40 to work, and controls the energy storage converter and the power generation assembly to be output in a grid-connected mode. In a time period with large load fluctuation, if the load becomes small in a short time, the bidirectional converter can store the energy of the energy storage converter in the energy storage battery assembly 20, if the load becomes large, the load can be quickly resisted by the instantaneous discharge capacity of the battery, the power supply stability is ensured under the auxiliary work of the main power generation assembly 30 or the auxiliary power generation assembly 40, and under the condition of a large load (the power of the temporary load is larger than the sum power of the power supply power of the energy storage battery assembly 20 and the power supply power of the main power generation assembly 30), the energy management system 10 controls to simultaneously start the auxiliary power generation assembly 40, the main power generation assembly 30 and the energy storage battery assembly 20 for grid-connected power supply. In the invention, the energy storage battery assembly 20 is matched with the energy storage converter to reasonably schedule the start-stop work of the auxiliary power generation assembly 40 and the main power generation assembly 30, thereby realizing seamless switching, ensuring the maximum utilization efficiency of fuel oil and achieving the technical effects of saving energy and reducing carbon emission.
Optionally, under the condition that the power of the temporary electric load is not greater than the power supply power of the energy storage battery assembly and the state of charge of the energy storage battery assembly reaches a preset full charge, the energy storage battery assembly is adopted to supply power to the terminal load.
Further, when the temporary load power is in the range of the sum power of the supply power of the energy storage battery assembly 20, the supply power of the energy storage battery assembly 20 and the supply power of the main power generation assembly 30, switching to a grid-connected power supply mode, and at this time, grid-connected power supply is performed by using the energy storage battery assembly 20 and the main power generation assembly 30: when the temporary load power is between the power supply power of the energy storage battery assembly 20 and the power supply power of the main power generation assembly 30, switching to a grid-connected charging power supply mode, at the moment, supplying power to the terminal load by using the main power generation assembly 30 and charging the energy storage battery assembly 20, and stopping supplying power to the energy storage battery assembly 20 if the state of charge of the energy storage battery assembly 20 reaches a preset upper limit value; when the temporary load power is between the power of the energy storage battery assembly 20 and the sum power of the energy storage battery assembly 20 and the power of the main power generation assembly 30, switching to a grid-connected discharging power supply mode, at the moment, adopting the main power generation assembly 30, the auxiliary power generation assembly 40 and the energy storage battery assembly 20 to be in parallel power supply, and starting the auxiliary power generation assembly 40 to charge the energy storage battery assembly 20 if the charge state of the energy storage battery assembly 20 reaches a preset lower limit value; if the state of charge of the energy storage battery assembly 20 reaches the preset upper limit value, the auxiliary power generation assembly 40 is turned off to stop supplying power to the energy storage battery assembly 20. Specifically, during the grid-connected power supply mode, the temporary electric load power and the state of charge of the energy storage battery assembly 20 are monitored in real time, and the real-time switching is performed according to the temporary electric load power and the state of charge of the energy storage battery assembly 20, so that the waste of energy consumption is avoided while the stable power supply is ensured. In the invention, the diesel generator is monitored and controlled to be turned on or off in real time and the charging and discharging of the energy storage battery assembly 20 are controlled by acquiring data and carrying out logic analysis.
Optionally, if the state of charge of the energy storage battery assembly reaches a preset lower limit value or the battery removes the charging prohibition condition, starting the auxiliary power generation assembly to charge the energy storage battery assembly; and if the state of charge of the energy storage battery assembly reaches the preset upper limit value and the load is reduced, closing the auxiliary power generation assembly to stop supplying power to the energy storage battery assembly.
Further, when the temporary load power is greater than the sum of the power supply power of the energy storage battery assembly 20 and the power supply power of the main power generation assembly 30, switching to a parallel operation power supply mode, at this time, adopting the auxiliary power generation assembly 40, the main power generation assembly 30 and the energy storage battery assembly 20 to perform parallel operation power supply, and controlling the main power generation assembly 30 or the auxiliary power generation assembly 40 to charge the energy storage battery assembly 20 if the state of charge of the energy storage battery assembly 20 does not reach a preset upper limit value; and if the state of charge of the energy storage battery assembly 20 does not reach the preset upper limit value, controlling the main power generation assembly 30 or the auxiliary power generation assembly 40 to stop charging the energy storage battery assembly 20. It is to be understood that, in the present invention, the rated power of the main power generation assembly 30 is larger than the rated power of the battery assembly.
Further, the auxiliary power generation assembly 40 includes a plurality of auxiliary diesel generators with different powers, and when the temporary load power is greater than the sum of the power supply power of the energy storage battery assembly 20 and the power supply power of the main power generation assembly 30, the auxiliary power generation assembly 40, the main power generation assembly 30, and the energy storage battery assembly 20 are switched to the parallel operation power supply mode, and at this time, the parallel operation power supply specifically includes: when the temporary electric load power is greater than the sum power of the power supply power of the energy storage battery assembly 20 and the power supply power of the main power generation assembly 30, switching to a parallel operation power supply mode, and determining a single auxiliary diesel generator or a plurality of auxiliary diesel generators combined in parallel according to the difference power between the temporary electric load power and the sum power of the energy storage battery assembly 20 and the power of the main power generation assembly 30, wherein the single auxiliary diesel generator or the plurality of auxiliary diesel generators are correspondingly satisfied with the parallel operation requirement. It can be understood that, the main power generation assembly 30 includes a main diesel generator, the rated power of two adjacent auxiliary diesel generators can differ by 5KW or 3KW, a single auxiliary diesel generator or a plurality of auxiliary diesel generators combined in parallel corresponding to meet the parallel operation requirement is determined by adopting the difference power between the temporary load power and the sum power of the energy storage battery assembly 20 and the power of the main power generation assembly 30, so as to match the corresponding auxiliary diesel generators to work, the normal power supply of the terminal load is ensured, the energy is saved, and the problem that the auxiliary diesel generators are easy to use and fatigue or be easily damaged due to the fact that a single auxiliary diesel generator is used for a long time is avoided.
Optionally, the rated power of two adjacent auxiliary diesel generators may differ by 0KW, that is, the rated power of all the auxiliary diesel generators is the same, and the controller is used to control the diesel engine power of the auxiliary diesel generators to be randomly matched with the difference power between the critical load power and the sum power of the energy storage battery assembly power and the main power generation assembly power.
According to the invention, the main power generation diesel engine and the auxiliary power generation diesel engine are at the best efficiency point through the energy storage battery assembly, so that the fluctuation of the diesel engines is reduced, and the waste of the diesel engines is reduced.
Preferably, when damage to the corresponding auxiliary diesel generator is detected, an additional auxiliary diesel generator is activated by the energy management system 10 to supply power in parallel with the main power generation assembly 30.
Further, the rated power consumption of the main power generation assembly 30 in the full oil state is obtained, the total power generation power consumption of the main power generation assembly 30 in a preset time period after the full oil state is obtained, the current remaining oil quantity of the main power generation assembly 30 is determined according to a preset scheme, the total power generation power consumption and the rated power consumption, whether the current remaining oil quantity is smaller than the target remaining oil quantity or not is judged, and when the current remaining oil quantity is smaller than the target remaining oil quantity, prompt information of fuel oil supplement is sent. Optionally, in the present invention, the target remaining oil amount may be set as the oil consumption required by the main power generation assembly 30 to operate for two hours at the rated power, the prompt information may be short message information sent to the mobile terminal or a corresponding alarm sound sent by the control buzzer, and the fuel oil is reminded to be replenished by two hours in advance, which is beneficial to prepare in advance with a user or beneficial to judge whether the fuel oil needs to be replenished in advance with the user so as to avoid refueling at night as much as possible. For example, when the user receives the prompt message at eleven hours in the evening, the user selects to add oil to the main power generation assembly 30 immediately according to the actual situation of the user, and when the user receives the prompt message at three hours in the early morning, the user can select to add oil to the main power generation assembly 30 after a half hour, and the prompt message is issued two hours in advance, so that the user can prepare sufficiently.
Preferably, the rated power consumption of the auxiliary diesel engine in a full oil state is acquired, the total power consumption of the auxiliary diesel engine in a preset time period after the auxiliary diesel engine is full oil is acquired, the current remaining oil quantity of the auxiliary diesel engine is determined according to a preset scheme, the total power consumption and the rated power consumption, whether the current remaining oil quantity is smaller than the target remaining oil quantity or not is judged, and when the current remaining oil quantity is smaller than the target remaining oil quantity, prompt information of fuel oil supplement is sent.
Further, in order to avoid charging at night as much as possible, the charge state of the energy storage battery assembly 20 is acquired at a first target time point, and if the charge state of the energy storage battery assembly 20 does not reach a preset upper limit value, the main power generation assembly 30 or the auxiliary power generation assembly 40 is used for charging the energy storage battery assembly 20; and if the state of charge of the energy storage battery assembly 20 does not reach the preset upper limit value, controlling the main power generation assembly 30 or the auxiliary power generation assembly 40 to stop charging the energy storage battery assembly 20. For example, the charge state of the energy storage battery assembly 20 is acquired at ten o' clock in the evening, and if the charge state of the energy storage battery assembly 20 does not reach the preset upper limit value, the main power generation assembly 30 or the auxiliary power generation assembly 40 is adopted to charge the energy storage battery assembly 20; if the state of charge of the energy storage battery assembly 20 does not reach the preset upper limit value, the main power generation assembly 30 or the auxiliary power generation assembly 40 stops charging the energy storage battery assembly 20, and then the state of charge of the energy storage battery assembly 20 does not reach the preset upper limit value at twelve o' clock night, so that the main power generation assembly 30 or the auxiliary power generation assembly 40 is prevented from being started as much as possible to serve as the energy storage battery assembly 20 in the early morning, and noise pollution is reduced.
Further, the energy storage battery assembly 20 includes a lithium iron phosphate battery.
Referring to fig. 2 again, the present invention further provides a temporary power supply device, which includes an energy management system 10, an energy storage battery assembly 20, a main power generation assembly 30, an auxiliary power generation assembly 40, and a bidirectional energy storage converter 50 electrically connected to a terminal load, wherein the main power generation assembly 30 and the auxiliary power generation assembly 40 are connected in parallel and are respectively electrically connected to the bidirectional energy storage converter 50, the energy storage battery assembly 20 is electrically connected to the bidirectional energy storage converter 50, and the bidirectional energy storage converter 50 is connected to the energy management system 10; the energy management system 10 is configured to obtain a temporary power load power required by a terminal load and determine a power supply mode according to the temporary power load power, where the power supply mode includes an off-grid power supply mode, a grid-connected power supply mode, and a parallel-connected power supply mode; when the off-grid power supply mode is in, the energy management system 10 controls the energy storage battery assembly 20 to supply power, and if the state of charge of the energy storage battery assembly 20 reaches a preset lower limit value, the main power generation assembly 30 or the auxiliary power generation assembly 40 is started to charge the energy storage battery assembly 20; if the state of charge of the energy storage battery assembly 20 reaches the preset upper limit value, the main power generation assembly 30 or the auxiliary power generation assembly 40 is turned off to stop charging the energy storage battery assembly 20; when the grid-connected power supply mode is adopted, the energy management system 10 controls the energy storage battery assembly 20 and the main power generation assembly 30 to supply power in a grid-connected mode; when the hybrid power supply mode is used, the auxiliary power generation assembly 40, the main power generation assembly 30 and the energy storage battery assembly 20 are controlled by the energy management system 10 to perform hybrid power supply.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A scheduling method for temporary seamless power utilization switching is characterized by comprising the following steps:
acquiring temporary load power required by a terminal load;
determining a power supply mode according to the critical load power:
when the temporary load power is not greater than the power supply power of the energy storage battery assembly, switching to an off-grid power supply mode, supplying power by using the energy storage battery assembly, and starting a main power generation assembly or an auxiliary power generation assembly to charge the energy storage battery assembly if the charge state of the energy storage battery assembly reaches a preset lower limit value; if the state of charge of the energy storage battery assembly reaches a preset upper limit value, closing the main power generation assembly or the auxiliary power generation assembly to stop charging the energy storage battery assembly;
when the temporary load power is in the range of the sum power of the power supply power of the energy storage battery assembly, the power supply power of the energy storage battery assembly and the power supply power of the main power generation assembly, switching to a grid-connected power supply mode, and at the moment, adopting the energy storage battery assembly and the main power generation assembly for grid-connected power supply;
when the temporary load power is larger than the sum power of the power supply power of the energy storage battery assembly and the power supply power of the main power generation assembly, switching to a parallel operation power supply mode, and at the moment, adopting the auxiliary power generation assembly, the main power generation assembly and the energy storage battery assembly to perform parallel operation power supply;
acquiring rated power consumption of the main power generation assembly in a full oil state, acquiring total power generation power consumption of the main power generation assembly in a preset time period after the main power generation assembly is full of oil, determining the current residual oil quantity of the main power generation assembly according to a preset scheme, the total power generation power consumption and the rated power consumption, judging whether the current residual oil quantity is less than a target residual oil quantity, and sending prompt information of fuel oil supplement when the current residual oil quantity is less than the target residual oil quantity;
acquiring the charge state of the energy storage battery assembly at a first target time point, and charging the energy storage battery assembly by adopting the main power generation assembly or the auxiliary power generation assembly if the charge state of the energy storage battery assembly does not reach a preset upper limit value; and if the state of charge of the energy storage battery assembly reaches a preset upper limit value, controlling the main power generation assembly or the auxiliary power generation assembly to stop charging the energy storage battery assembly.
2. The scheduling method of temporary power seamless handover according to claim 1,
when the temporary load power is greater than the sum power of the power supply power of the energy storage battery assembly and the power supply power of the main power generation assembly, switching to a parallel operation power supply mode, wherein the parallel operation power supply of the auxiliary power generation assembly, the main power generation assembly and the energy storage battery assembly comprises the following steps:
when the temporary load power is between the power supply power of the energy storage battery assembly and the power supply power of the main power generation assembly, switching to a grid-connected charging power supply mode, at the moment, adopting the main power generation assembly to supply power to the terminal load and charge the energy storage battery assembly, and stopping supplying power to the energy storage battery assembly if the charge state of the energy storage battery assembly reaches a preset upper limit value;
when the temporary load power is between the power of the energy storage battery assembly and the sum power of the energy storage battery assembly and the power of the main power generation assembly, switching to a grid-connected discharging power supply mode, at the moment, adopting the main power generation assembly, an auxiliary power generation assembly and the energy storage battery assembly to be connected in parallel for supplying power, and controlling to start the auxiliary power generation assembly to charge the energy storage battery assembly if the charge state of the energy storage battery assembly reaches a preset lower limit value; and if the state of charge of the energy storage battery assembly reaches a preset upper limit value, controlling to close the auxiliary power generation assembly to stop supplying power to the energy storage battery assembly.
3. The scheduling method of temporary power seamless handover according to claim 1,
when the temporary load power is larger than the sum power of the power supply power of the energy storage battery assembly and the power supply power of the main power generation assembly, switching to a parallel operation power supply mode, performing parallel operation power supply by adopting the auxiliary power generation assembly, the main power generation assembly and the energy storage battery assembly, and controlling the main power generation assembly or the auxiliary power generation assembly to charge the energy storage battery assembly if the charge state of the energy storage battery assembly does not reach a preset upper limit value; and if the state of charge of the energy storage battery assembly does not reach a preset upper limit value, controlling the main power generation assembly or the auxiliary power generation assembly to stop charging the energy storage battery assembly.
4. The scheduling method of temporary power seamless handover according to claim 3,
the auxiliary power generation assembly includes a plurality of auxiliary diesel generators of different powers,
when the temporary load power is greater than the sum power of the power supply power of the energy storage battery assembly and the power supply power of the main power generation assembly, switching to a parallel operation power supply mode, wherein the parallel operation power supply of the auxiliary power generation assembly, the main power generation assembly and the energy storage battery assembly comprises the following steps:
when the temporary electric load power is larger than the sum power of the power supply power of the energy storage battery assembly and the power supply power of the main power generation assembly, switching to a parallel operation power supply mode, and determining a single auxiliary diesel generator or a plurality of auxiliary diesel generators in parallel combination which correspondingly meet parallel operation requirements according to the difference power between the temporary electric load power and the sum power of the energy storage battery assembly power and the main power generation assembly power.
5. The scheduling method of temporary power seamless handover according to any one of claims 1 to 4,
the energy storage battery assembly comprises a lithium iron phosphate battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111200673.8A CN113644733B (en) | 2021-10-15 | 2021-10-15 | Scheduling method for temporary power utilization seamless switching and power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111200673.8A CN113644733B (en) | 2021-10-15 | 2021-10-15 | Scheduling method for temporary power utilization seamless switching and power supply device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113644733A CN113644733A (en) | 2021-11-12 |
| CN113644733B true CN113644733B (en) | 2022-02-15 |
Family
ID=78426980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111200673.8A Active CN113644733B (en) | 2021-10-15 | 2021-10-15 | Scheduling method for temporary power utilization seamless switching and power supply device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113644733B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114744706A (en) * | 2022-04-02 | 2022-07-12 | 北京潞电电气设备有限公司 | A temporary power supply power design auxiliary system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916486A (en) * | 2012-09-28 | 2013-02-06 | 南方电网科学研究院有限责任公司 | Intelligent micro-grid diesel-storage coordination control method |
| KR101310312B1 (en) * | 2012-07-04 | 2013-09-23 | 주식회사 조앤파트너스 | Reorganizing method of power supply system for ship |
| CN106208114A (en) * | 2016-08-10 | 2016-12-07 | 天津天大求实电力新技术股份有限公司 | A kind of based on the many scenes application controls method on the basis of the most standing electricity of energy storage |
| WO2017152798A1 (en) * | 2016-03-07 | 2017-09-14 | 中兴通讯股份有限公司 | Method and device for controlling power supply of oil engine and battery |
| CN209497275U (en) * | 2019-04-24 | 2019-10-15 | 深圳市聚能优电科技有限公司 | It is a kind of applied in temporary power bavin storage system can increase-volume energy storage device in parallel |
| CN209497278U (en) * | 2019-04-24 | 2019-10-15 | 深圳市聚能优电科技有限公司 | A kind of energy-storage system improving Efficiency of Diesel Engine |
-
2021
- 2021-10-15 CN CN202111200673.8A patent/CN113644733B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101310312B1 (en) * | 2012-07-04 | 2013-09-23 | 주식회사 조앤파트너스 | Reorganizing method of power supply system for ship |
| CN102916486A (en) * | 2012-09-28 | 2013-02-06 | 南方电网科学研究院有限责任公司 | Intelligent micro-grid diesel-storage coordination control method |
| WO2017152798A1 (en) * | 2016-03-07 | 2017-09-14 | 中兴通讯股份有限公司 | Method and device for controlling power supply of oil engine and battery |
| CN106208114A (en) * | 2016-08-10 | 2016-12-07 | 天津天大求实电力新技术股份有限公司 | A kind of based on the many scenes application controls method on the basis of the most standing electricity of energy storage |
| CN209497275U (en) * | 2019-04-24 | 2019-10-15 | 深圳市聚能优电科技有限公司 | It is a kind of applied in temporary power bavin storage system can increase-volume energy storage device in parallel |
| CN209497278U (en) * | 2019-04-24 | 2019-10-15 | 深圳市聚能优电科技有限公司 | A kind of energy-storage system improving Efficiency of Diesel Engine |
Non-Patent Citations (1)
| Title |
|---|
| 应急微电网中柴储移动电源的协调及均衡控制策略;赵梓杉 等;《电力系统自动化》;20190525;第43卷(第10期);第53-59页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113644733A (en) | 2021-11-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2021189659A1 (en) | Energy control system and control method for hybrid power supply system of communication base station | |
| US10998732B2 (en) | System and method for diverse multi-source energy management | |
| CN102044989B (en) | Hybrid energy power supply system and method based on solar system | |
| CN111313397B (en) | Energy control system and control method for communication base station hybrid power supply system | |
| GB2446694A (en) | Mains rechargeable hybrid electric vehicle | |
| CN109768561A (en) | Electric vehicle control method and system | |
| CN105305541A (en) | Method and device for controlling low-power battery of electric automobile | |
| CN113335140A (en) | Control method, hybrid system, vehicle, and readable storage medium | |
| CN106981914A (en) | A kind of vehicle-mounted energy control method and system based on double cell | |
| CN115885447A (en) | Charging and discharging device, method for charging and discharging battery, and charging and discharging system | |
| CN116316767B (en) | Network side power management control method and device for optical storage system | |
| CN113644733B (en) | Scheduling method for temporary power utilization seamless switching and power supply device | |
| CN114844099A (en) | Battery power supplementing method and terminal based on light storage diesel micro-grid system | |
| CN114094622A (en) | Control method, control device, medium and equipment of off-grid micro-grid system | |
| CN113193645B (en) | Control method of hydrogen fuel cell emergency power supply system | |
| CN114655073B (en) | Electric balance control method and device and electric automobile | |
| CN114513013A (en) | Energy scheduling method, device, control equipment and storage medium | |
| CN106208117B (en) | The control method of energy-storage battery in a kind of isolated microgrid | |
| CN210430931U (en) | Energy storage air conditioning system | |
| JP2002058175A (en) | Independent power supply system | |
| JPH09312935A (en) | Power storage type power supply system and power storage method | |
| CN111525622B (en) | A photoelectric storage and charging integrated microgrid energy management system and method | |
| CN115107538A (en) | Energy management method and device for automobile | |
| CN115021297A (en) | Charging pile operation management system and charging and discharging control method for smart city | |
| CN114301097A (en) | Photovoltaic system and electric energy control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |