CN117833323B - High-voltage direct-hanging energy storage system, black start method thereof, electronic equipment and storage medium - Google Patents
High-voltage direct-hanging energy storage system, black start method thereof, electronic equipment and storage medium Download PDFInfo
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Abstract
The invention relates to a high-voltage direct-hanging energy storage system and a black start method, electronic equipment and a storage medium thereof, wherein the high-voltage direct-hanging energy storage system comprises an alternating current bus, a user side breaker, an energy storage side breaker, an alternating current reactor, a PCS power module, a transformer, an uninterruptible power supply UPS and a PCS controller, wherein the alternating current bus is connected with the PCS power module through the user side breaker, the energy storage side breaker and the alternating current reactor, the alternating current bus is also connected with the PCS controller through the user side breaker, the transformer and the uninterruptible power supply, the method is applied to the PCS controller, a first voltage on the alternating current bus, a second voltage between the user side breaker and the energy storage side breaker and a Hall current of the PCS power module are firstly obtained, and then the user side breaker and the energy storage side breaker are controlled according to the first voltage, the second voltage and the Hall current.
Description
Technical Field
The present invention relates to the field of energy storage systems, and in particular, to a high-voltage direct-hanging energy storage system, a black start method thereof, an electronic device, and a storage medium.
Background
The high-voltage direct-hanging energy storage system has been widely used in various fields such as peak regulation, frequency modulation, peak clipping and valley filling, and promotion of new energy grid-connected digestion by virtue of the remarkable advantages of the high-voltage direct-hanging energy storage system, such as large single machine capacity, low grid-connected current harmonic content, flexible power configuration and the like. Particularly in important load areas such as critical infrastructure (e.g. hospitals, data centers, transportation hubs (e.g. airports, railway stations, subway stations) and the like, large industrial enterprises, public service facilities) and the like, the power supply can be used as a stable and reliable supporting power supply. For example, when the power system suffers a serious fault or a full power outage, the energy storage system should be able to independently bear heavy duty, and drive the important load to operate without grid support. At the same time, it should also have the ability to restart those gensets that do not have a self-starting function. By gradually expanding the restoration range, the final goal is to fully restore the power supply of the entire system, i.e., black start.
The black start strategy and design are concentrated in the low-voltage field, the multi-system cooperative control is complex and is easy to cause black start failure, the black start method provided in the high-voltage direct-hanging energy storage system is fewer, the defects of complex control, low reliability and the like exist in specific practical application, the 'black start' design of the high-voltage direct-hanging energy storage system is incomplete, and the control flow is not clear enough.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
Therefore, a first object of the present invention is to provide a black start method of a high-voltage direct-hanging energy storage system, which has the characteristics of intelligence and automation, reduces the possibility of manual intervention and misoperation, and improves the stability and reliability of the system.
A second object of the present invention is to provide a high voltage direct-hanging energy storage system.
A third object of the present invention is to propose an electronic device.
A fourth object of the present invention is to propose a computer readable storage medium.
A fifth object of the invention is to propose a computer programme product.
To achieve the above objective, an embodiment of a first aspect of the present invention provides a black start method of a high-voltage direct-hanging energy storage system, where the high-voltage direct-hanging energy storage system includes an ac bus, a user side circuit breaker, an energy storage side circuit breaker, an ac reactor, a PCS power module, a transformer, an uninterruptible power supply UPS, and a PCS controller, the ac bus is connected to the PCS power module through the user side circuit breaker, the energy storage side circuit breaker, the ac reactor, and the ac bus is also connected to the PCS controller through the user side circuit breaker, the transformer, and the uninterruptible power supply, and the method is applied to the PCS controller, and includes: acquiring a first voltage on the alternating current bus, a second voltage between the user side circuit breaker and the energy storage side circuit breaker, and a Hall current of the PCS power module; and controlling the user side circuit breaker and the energy storage side circuit breaker according to the first voltage, the second voltage and the Hall current.
The high-voltage direct-hanging energy storage system comprises an alternating-current bus, a user side breaker, an energy storage side breaker, an alternating-current reactor, a PCS power module, a transformer, an uninterruptible power supply UPS and a PCS controller, wherein the alternating-current bus is connected with the PCS power module through the user side breaker, the energy storage side breaker and the alternating-current reactor, the alternating-current bus is also connected with the PCS controller through the user side breaker, the transformer and the uninterruptible power supply, the black starting method of the high-voltage direct-hanging energy storage system is applied to the PCS controller, the PCS controller firstly obtains a first voltage on the alternating-current bus, a second voltage between the user side breaker and the energy storage side breaker and a Hall current of the PCS power module, and then controls the user side breaker and the energy storage side breaker according to the first voltage, the second voltage and the Hall current. Therefore, the method has the characteristics of intelligence and automation, reduces the possibility of manual intervention and misoperation, and improves the stability and reliability of the system.
In addition, the black start method of the high-voltage direct-hanging energy storage system provided by the embodiment of the first aspect of the invention can also have the following additional technical characteristics:
According to an embodiment of the present invention, the controlling the user side circuit breaker and the energy storage side circuit breaker according to the first voltage, the second voltage, and the hall current includes:
judging whether the first voltage, the second voltage and the Hall current are abnormal or not;
If at least one of the first voltage, the second voltage and the Hall current is abnormal, the user side breaker and the energy storage side breaker are controlled to be disconnected, the PCS power module is controlled to stop, and stop self-checking and stop timing are carried out; the PCS controller is powered by the uninterruptible power supply UPS in the processes of stopping self-checking and stopping timing.
According to one embodiment of the invention, the method further comprises:
And determining that the shutdown self-check is passed and the time length of shutdown timing exceeds the set time length, controlling the energy storage side breaker to be closed, and controlling the PCS power module to reset, stand by and start so as to enable the PCS power module to operate in an off-grid mode.
According to one embodiment of the invention, the method further comprises:
Determining whether the amplitude and the phase of the first voltage are synchronous with the amplitude and the phase of the second voltage when the alternating current bus is electrified according to the first voltage;
And if the amplitude and the phase of the first voltage are synchronous with those of the second voltage, controlling the user side breaker to be closed so as to enable the PCS power module to operate in a grid-connected mode.
To achieve the above object, in a second aspect of the present invention, an embodiment provides a high-voltage direct-hanging energy storage system, comprising: the power supply system comprises an alternating current bus, a user side circuit breaker, an energy storage side circuit breaker, an alternating current reactor, a PCS power module, a transformer, an uninterruptible power supply UPS and a PCS controller, wherein the alternating current bus is connected with the PCS power module through the user side circuit breaker, the energy storage side circuit breaker and the alternating current reactor, and the alternating current bus is also connected with the PCS controller through the user side circuit breaker, the transformer and the uninterruptible power supply; the PCS controller is used for acquiring a first voltage on the alternating current bus, a second voltage between the user side circuit breaker and the energy storage side circuit breaker and a Hall current of the PCS power module, and controlling the user side circuit breaker and the energy storage side circuit breaker according to the first voltage, the second voltage and the Hall current.
The high-voltage direct-hanging energy storage system comprises an alternating current bus, a user side circuit breaker, an energy storage side circuit breaker, an alternating current reactor, a PCS power module, a transformer, an uninterruptible power supply UPS and a PCS controller, wherein the alternating current bus is connected with the PCS power module through the user side circuit breaker, the energy storage side circuit breaker and the alternating current reactor, and is also connected with the PCS controller through the user side circuit breaker, the transformer and the uninterruptible power supply; the PCS controller is used for acquiring a first voltage on the alternating current bus, a second voltage between the user side circuit breaker and the energy storage side circuit breaker and a Hall current of the PCS power module, and controlling the user side circuit breaker and the energy storage side circuit breaker according to the first voltage, the second voltage and the Hall current. Therefore, the control strategy of the system has the characteristics of intelligence and automation, reduces the possibility of manual intervention and misoperation, and improves the stability and reliability of the system.
In addition, the high-voltage direct-hanging energy storage system provided by the embodiment of the second aspect of the invention can also have the following additional technical characteristics:
according to an embodiment of the present invention, the PCS controller is configured to control the user side breaker and the energy storage side breaker according to the first voltage, the second voltage, and the hall current, and includes:
Judging whether the first voltage, the second voltage and the Hall current are abnormal, if at least one of the first voltage, the second voltage and the Hall current is abnormal, controlling the user side circuit breaker and the energy storage side circuit breaker to be disconnected, controlling the PCS power module to stop, and performing stop self-checking and stop timing; the PCS controller is powered by the uninterruptible power supply UPS in the processes of stopping self-checking and stopping timing.
According to one embodiment of the present invention, the PCS controller is further configured to control the energy storage side breaker to be closed when it is determined that the shutdown self-check is passed and the duration of the shutdown timer exceeds a set duration, and control the PCS power module to be reset, standby and started, so that the PCS power module operates in an off-grid mode.
According to one embodiment of the present invention, the PCS controller is further configured to determine, when the ac bus is powered up according to the first voltage, whether the amplitude and phase of the first voltage are synchronous with the amplitude and phase of the second voltage, and if the amplitude and phase of the first voltage are synchronous with the amplitude and phase of the second voltage, control the user side circuit breaker to be closed so that the PCS power module operates in a grid-connected mode.
To achieve the above object, an embodiment of a third aspect of the present invention further provides an electronic device, including:
At least one processor; and
A memory communicatively coupled to the at least one processor; wherein,
The memory stores instructions executable by the at least one processor to enable the at least one processor to perform the black start method of the high voltage direct hanging energy storage system described above.
According to the battery equipment provided by the embodiment of the invention, the possibility of manual intervention and misoperation is reduced by executing the black start method of the high-voltage direct-hanging energy storage system, and the stability and reliability of the system are improved.
To achieve the above object, a fourth aspect of the present invention provides a computer readable storage medium, where the computer instructions are configured to cause the computer to execute the black start method of the high voltage direct hanging energy storage system.
The computer readable storage medium of the embodiment of the invention reduces the possibility of manual intervention and misoperation and improves the stability and reliability of the system by executing the black start method of the high-voltage direct-hanging energy storage system.
To achieve the above object, a fifth test embodiment of the present invention further provides a computer program product, which when executed by an instruction processor in the computer program product, performs the above-mentioned black start method of the high voltage direct hanging energy storage system.
According to the computer program product provided by the embodiment of the invention, through executing the black start method of the high-voltage direct-hanging energy storage system, the possibility of manual intervention and misoperation is reduced, and the stability and reliability of the system are improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic diagram of a high voltage direct-hang energy storage system according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a black start process of a high voltage direct-hang energy storage system according to one embodiment of the invention;
Fig. 3 is a flowchart of a black start method of a high voltage direct hanging energy storage system in accordance with an embodiment of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
The following describes a high-voltage direct-hanging energy storage system, a black start method thereof, an electronic device and a storage medium according to embodiments of the present invention with reference to the accompanying drawings.
At present, the traditional synchronous power sources such as thermal power, hydropower and the like are taken as the leading power sources in the power system of China, a huge alternating current synchronous power grid is constructed, and safe and stable operation of the power grid is ensured. However, as the duty cycle of new energy generation in electrical power structures increases rapidly, electrical power systems are facing "dual high" features, i.e., high proportions of renewable energy sources and high proportions of power electronics. The transformation brings about deep changes to the production structure, the operation mechanism and the functional form of the power system, and simultaneously causes the problems of low inertia, low damping, weak voltage support and the like, so that the safe and stable operation of the power system faces challenges.
Under the condition that a large-area power failure is caused by power system faults in a power station, the large-capacity battery energy storage system is utilized to directly carry out black start on the thermal power unit, and the recovery speed of a power grid after faults can be obviously accelerated. Although the application of the battery energy storage system in black start has been studied, most focus on the micro-grid field, and a droop control strategy is adopted to realize multi-micro-source parallel operation. In addition, a black start power supply control method based on the operation characteristics of the electric automobile charging, discharging and energy storage integrated power station is provided. However, these methods are not suitable for high voltage direct-hanging energy storage systems and do not enable seamless switching off grid.
Therefore, the invention designs the high-voltage direct-hanging energy storage system with the uninterrupted power supply UPS and the transformer such as the transformer for the 35kV/400V station aiming at the high-voltage direct-hanging energy storage system such as the 35kV self-powered cascading high-voltage direct-hanging energy storage system. The system not only can support the work of important load when the power system fails, but also can drive the generator set to restart, and the reclosing function is realized after the failure is recovered.
Fig. 1 is a schematic diagram of a high voltage direct-hang energy storage system according to an embodiment of the invention.
As shown in fig. 1, a high voltage direct-hanging energy storage system according to an embodiment of the present invention includes: alternating current buses such as 35kV buses, user side circuit breakers QF1, energy storage side circuit breakers QF2, alternating current reactors, PCS power modules, transformers such as transformers for 35kV/400V stations, uninterruptible power supplies UPS and PCS controllers.
The alternating current bus is connected with the PCS power module through a user side breaker QF1, an energy storage side breaker QF2 and an alternating current reactor, the alternating current bus is also connected with the PCS controller through the user side breaker QF1, a transformer and an uninterruptible power supply, and the PCS controller is used for acquiring a first voltage on the alternating current bus, a second voltage between the user side breaker QF1 and the energy storage side breaker QF2 and a Hall current of the PCS power module and controlling the user side breaker QF1 and the energy storage side breaker QF2 according to the first voltage, the second voltage and the Hall current.
The PCS power Module in the embodiment of the invention includes a plurality of SMs (Sub-modules), such as SM A1-SMAN、SMB1-SMBN、…、SMC1-SMCN, which are basic units constituting the PCS power Module and are responsible for converting dc power into ac power or vice versa, so as to meet the requirements of the power system. Each SM is formed by cascading a plurality of identical H-bridge submodules, and each power unit chain link comprises a plurality of full-bridge power units consisting of 4 full-control device IGBTs (Insulated Gate Bipolar Transistor, insulated gate bipolar transistors) and anti-parallel diodes thereof, a direct-current voltage stabilizing capacitor C 1, an M omega-level equalizing resistor R m, a direct-current smoothing reactor L 1, direct-current contactors J 1 and J 2 of a direct-current soft starting circuit, a pre-charging resistor R 1, an isolating switch K m and an energy storage battery cluster unit. The high-voltage direct-hanging energy storage system is characterized in that: the control power supply of SM is got from energy storage battery cluster unit, and gets the electricity point setting and be close to energy storage battery cluster unit one end, and this kind of design is favorable to the insulation design of control power supply, has still guaranteed control power supply stability and reliability. It should be noted that, when the power supply voltage provided by the energy storage battery cluster unit is not the power supply voltage required by the SM, the DC power provided by the energy storage battery cluster unit may be converted by a DC-DC (Direct Current to Direct Current, direct current-direct current) converter and then supplied to the SM.
In the embodiment of the present invention, the first voltage may be detected by the voltage sensor PT1 provided between the ac bus bar and the customer side breaker QF1, and the second voltage may be detected by the voltage sensor PT2 provided between the customer side breaker QF1 and the energy storage side breaker QF 2. After the first voltage, the second voltage and the Hall current are obtained, the PCS controller judges whether the first voltage, the second voltage and the Hall current are abnormal, if at least one of the first voltage, the second voltage and the Hall current is abnormal, the PCS controller controls the user side breaker QF1 and the energy storage side breaker QF2 to be disconnected, controls the PCS power module to stop, and performs stop self-checking and stop timing; the PCS controller is powered by the uninterruptible power supply UPS in the processes of stopping self-checking and stopping timing.
According to the invention, by adding the transformer such as the transformer for the 35kV/400V station, the rear end supplies power to the PCS controller through the UPS uninterrupted power supply, the spontaneous self-use of the PCS power supply can be realized in the black start process, and the duration time is long.
In the embodiment of the invention, the PCS controller is also used for controlling the closing of the energy storage side breaker QF2 and controlling the resetting, standby and starting of the PCS power module when the stop self-checking is confirmed to pass and the time length of stop timing exceeds the set time length, so that the PCS power module operates in the off-grid mode.
In the embodiment of the invention, the PCS controller is further configured to determine, when the ac bus is powered on according to the first voltage, whether the amplitude and the phase of the first voltage are synchronous with the amplitude and the phase of the second voltage, and if the amplitude and the phase of the first voltage are synchronous with the amplitude and the phase of the second voltage, control the user side circuit breaker QF1 to be closed so that the PCS power module operates in the grid-connected mode.
Therefore, the high-voltage direct-hanging energy storage system gradually establishes the grid voltage with stable phase and amplitude under the condition that the grid is completely black (the grid is generally totally black and refers to the grid is subjected to comprehensive fault, so that large-scale power failure is caused, and the whole system loses power supply), and adjusts in real time according to the load condition. Meanwhile, after the high-voltage direct-hanging energy storage system works off the grid, the output phase and amplitude of the high-voltage direct-hanging energy storage system can deviate to a certain extent and are inconsistent with the amplitude and phase of the power grid voltage, and direct grid connection cannot be achieved at the moment, otherwise overcurrent is caused. Therefore, the invention designs a synchronization link of the amplitude and the phase of the power grid voltage, after receiving a re-grid-connection instruction, the PCS controller adds an amplitude and phase synchronization control loop of the voltage in a control algorithm, and when the amplitude and the phase of the power grid voltage are synchronous with the amplitude and the phase of the output voltage of the PCS power module, the user side breaker QF1 is closed, so that grid connection is realized. The strategy has the characteristics of intelligence and automation, reduces the possibility of manual intervention and misoperation, and improves the stability and reliability of the system.
On the basis of the high-voltage direct-hanging energy storage system, the black start control flow based on the high-voltage direct-hanging energy storage system is configured as shown in fig. 2, and comprises the following contents:
Firstly, setting black start operation parameters of the PCS power module off-grid according to actual conditions of a power grid, and starting a self-adaptive black start function.
In general, a PCS power module in the high-voltage direct-hanging energy storage system is normally connected with a power grid for starting operation, when the PCS controller detects that a 35kV power grid is powered off due to the fact that a fault occurs in the system, the PCS power module is controlled to stop in a standing mode, a self-checking program and stop timing are started at the same time, and at the moment, the PCS controller is continuously powered by an uninterruptible power supply UPS. It should be noted that the duration of the shutdown timer is less than the time available for the UPS, otherwise, the power of the UPS is exhausted, and the PCS power module cannot be started.
If the self-checking PCS power module passes the self-checking PCS power module and the stop time exceeds the preset time, the self-checking PCS power module is controlled to be automatically reset, standby and started, the voltage on the energy storage side breaker QF2 can rise to 35kV in Ts, the self-checking PCS power module can stably operate in an off-grid mode, meanwhile, important load power supply, restarting of a generator set and power supply of an uninterruptible power supply UPS are met, continuous power supply is realized, and the power supply time depends on the load size and the capacity configuration of an energy storage system.
When the restarting of the generator set is completed, after the PCS controller detects that the 35kV bus is electrified again, a grid-connected pre-synchronization control strategy is started, and the voltage amplitude and the phase output by the PCS power module are adjusted.
When the voltage amplitude and phase outputted by the PCS power module are synchronous with the voltage amplitude and phase on the 35kV bus, the system presynchronizing marker is at position 1.
And notifying the upper stage of a grid-connected instruction capable of issuing reclosing or automatically issuing an instruction for controlling the user-side breaker QF1, and simultaneously, after the grid connection is successful, switching the PCS into a normal grid-connected operation state again.
The self-adaptive black start control flow of the high-voltage direct-hanging energy storage system has the advantages of high control efficiency, high self-recovery time, strong impact capability and the like.
In summary, the high-voltage direct-hanging energy storage system of the embodiment of the invention comprises an ac bus, a user side circuit breaker, an energy storage side circuit breaker, an ac reactor, a PCS power module, a transformer, an uninterruptible power supply UPS and a PCS controller, wherein the ac bus is connected with the PCS power module through the user side circuit breaker, the energy storage side circuit breaker and the ac reactor, and the ac bus is also connected with the PCS controller through the user side circuit breaker, the transformer and the uninterruptible power supply; the PCS controller is used for acquiring a first voltage on the alternating current bus, a second voltage between the user side circuit breaker and the energy storage side circuit breaker and a Hall current of the PCS power module, and controlling the user side circuit breaker and the energy storage side circuit breaker according to the first voltage, the second voltage and the Hall current. Therefore, the control strategy of the system has the characteristics of intelligence and automation, reduces the possibility of manual intervention and misoperation, and improves the stability and reliability of the system.
Fig. 3 is a flowchart of a black start method of a high voltage direct hanging energy storage system in accordance with an embodiment of the present invention.
As shown in fig. 1, a high voltage direct-hanging energy storage system according to an embodiment of the present invention includes: the power supply system comprises an alternating current bus, a user side breaker QF1, an energy storage side breaker QF2, an alternating current reactor, a PCS power module, a transformer, an uninterruptible power supply UPS and a PCS controller, wherein the alternating current bus is connected with the PCS power module through the user side breaker QF1, the energy storage side breaker QF2 and the alternating current reactor, and is also connected with the PCS controller through the user side breaker QF1, the transformer and the uninterruptible power supply.
It should be noted that the high-voltage direct-hanging energy storage system of the embodiment of the invention is applied to a PCS controller.
As shown in fig. 3, a black start method of a high-voltage direct-hanging energy storage system according to an embodiment of the present invention includes:
S1, acquiring a first voltage on an alternating current bus, a second voltage between a user side circuit breaker and an energy storage side circuit breaker and a Hall current of a PCS power module.
S2, controlling the user side circuit breaker and the energy storage side circuit breaker according to the first voltage, the second voltage and the Hall current.
According to one embodiment of the present invention, controlling a user side circuit breaker and an energy storage side circuit breaker according to a first voltage, a second voltage, and a hall current, includes:
judging whether the first voltage, the second voltage and the Hall current are abnormal or not;
If at least one of the first voltage, the second voltage and the Hall current is abnormal, the user side breaker and the energy storage side breaker are controlled to be disconnected, the PCS power module is controlled to stop, and stop self-checking and stop timing are carried out; the PCS controller is powered by the uninterruptible power supply UPS in the processes of stopping self-checking and stopping timing.
According to an embodiment of the present invention, the method further comprises:
and determining that the shutdown self-check is passed and the time length of shutdown timing exceeds the set time length, controlling the closing of the energy storage side breaker, and controlling the reset, standby and starting of the PCS power module so as to enable the PCS power module to operate in an off-grid mode.
According to an embodiment of the present invention, the method further comprises:
When the alternating current bus is powered on according to the first voltage, judging whether the amplitude and the phase of the first voltage are synchronous with those of the second voltage or not;
And if the amplitude and the phase of the first voltage are synchronous with those of the second voltage, controlling the user side breaker to be closed so as to enable the PCS power module to operate in a grid-connected mode.
It should be noted that, for details not disclosed in the black start method of the high-voltage direct-hanging energy storage system in the embodiment of the present invention, please refer to details disclosed in the high-voltage direct-hanging energy storage system in the embodiment of the present invention, and details are not described herein again.
The high-voltage direct-hanging energy storage system comprises an alternating-current bus, a user side breaker, an energy storage side breaker, an alternating-current reactor, a PCS power module, a transformer, an uninterruptible power supply UPS and a PCS controller, wherein the alternating-current bus is connected with the PCS power module through the user side breaker, the energy storage side breaker and the alternating-current reactor, the alternating-current bus is also connected with the PCS controller through the user side breaker, the transformer and the uninterruptible power supply, the black starting method of the high-voltage direct-hanging energy storage system is applied to the PCS controller, the PCS controller firstly obtains a first voltage on the alternating-current bus, a second voltage between the user side breaker and the energy storage side breaker and a Hall current of the PCS power module, and then controls the user side breaker and the energy storage side breaker according to the first voltage, the second voltage and the Hall current. Therefore, the method has the characteristics of intelligence and automation, reduces the possibility of manual intervention and misoperation, and improves the stability and reliability of the system.
Based on the embodiment, the invention further provides electronic equipment.
The electronic equipment of the embodiment of the invention comprises: at least one processor; and a memory communicatively coupled to the at least one processor; the memory stores instructions executable by the at least one processor, the instructions being executable by the at least one processor to enable the at least one processor to perform the black start method of the high voltage direct hanging energy storage system.
According to the battery equipment provided by the embodiment of the invention, the possibility of manual intervention and misoperation is reduced by executing the black start method of the high-voltage direct-hanging energy storage system, and the stability and reliability of the system are improved.
Based on the above embodiments, the present invention also proposes a computer-readable storage medium.
The computer instructions in the computer readable storage medium according to the embodiments of the present invention are configured to cause a computer to execute the black start method of the high voltage direct hanging energy storage system described above.
The computer readable storage medium of the embodiment of the invention reduces the possibility of manual intervention and misoperation and improves the stability and reliability of the system by executing the black start method of the high-voltage direct-hanging energy storage system.
Based on the above embodiments, the present invention also proposes a computer program product.
In an embodiment of the present invention, the above-described black start method of the high voltage direct hanging energy storage system is performed when an instruction processor in a computer program product executes.
According to the computer program product provided by the embodiment of the invention, through executing the black start method of the high-voltage direct-hanging energy storage system, the possibility of manual intervention and misoperation is reduced, and the stability and reliability of the system are improved.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and additional implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order from that shown or discussed, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.
Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. As with the other embodiments, if implemented in hardware, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like. While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (8)
1. The utility model provides a black start method of high voltage direct-hanging energy storage system, its characterized in that, high voltage direct-hanging energy storage system includes alternating current bus, user side circuit breaker, energy storage side circuit breaker, alternating current reactor, PCS power module, transformer, uninterrupted power source UPS and PCS controller, alternating current bus passes through user side circuit breaker energy storage side circuit breaker alternating current reactor with PCS power module is connected, alternating current bus still passes through user side circuit breaker transformer uninterrupted power source with PCS controller is connected, the method is applied to the PCS controller includes:
acquiring a first voltage on the alternating current bus, a second voltage between the user side circuit breaker and the energy storage side circuit breaker, and a Hall current of the PCS power module;
Controlling the user side circuit breaker and the energy storage side circuit breaker according to the first voltage, the second voltage and the Hall current;
Wherein the controlling the user side breaker and the energy storage side breaker according to the first voltage, the second voltage, and the hall current includes:
judging whether the first voltage, the second voltage and the Hall current are abnormal or not;
If at least one of the first voltage, the second voltage and the Hall current is abnormal, the user side breaker and the energy storage side breaker are controlled to be disconnected, the PCS power module is controlled to stop, and stop self-checking and stop timing are carried out; the PCS controller is powered by the uninterruptible power supply UPS in the processes of stopping self-checking and stopping timing.
2. The method according to claim 1, wherein the method further comprises:
And determining that the shutdown self-check is passed and the time length of shutdown timing exceeds the set time length, controlling the energy storage side breaker to be closed, and controlling the PCS power module to reset, stand by and start so as to enable the PCS power module to operate in an off-grid mode.
3. The method according to claim 2, wherein the method further comprises:
Determining whether the amplitude and the phase of the first voltage are synchronous with the amplitude and the phase of the second voltage when the alternating current bus is electrified according to the first voltage;
And if the amplitude and the phase of the first voltage are synchronous with those of the second voltage, controlling the user side breaker to be closed so as to enable the PCS power module to operate in a grid-connected mode.
4. A high voltage direct-hanging energy storage system, comprising: the power supply system comprises an alternating current bus, a user side circuit breaker, an energy storage side circuit breaker, an alternating current reactor, a PCS power module, a transformer, an uninterruptible power supply UPS and a PCS controller, wherein the alternating current bus is connected with the PCS power module through the user side circuit breaker, the energy storage side circuit breaker and the alternating current reactor, and the alternating current bus is also connected with the PCS controller through the user side circuit breaker, the transformer and the uninterruptible power supply; wherein,
The PCS controller is used for acquiring a first voltage on the alternating current bus, a second voltage between the user side circuit breaker and the energy storage side circuit breaker and a Hall current of the PCS power module, and controlling the user side circuit breaker and the energy storage side circuit breaker according to the first voltage, the second voltage and the Hall current;
The PCS controller is configured to control the user side breaker and the energy storage side breaker according to the first voltage, the second voltage, and the hall current, and includes:
Judging whether the first voltage, the second voltage and the Hall current are abnormal, if at least one of the first voltage, the second voltage and the Hall current is abnormal, controlling the user side circuit breaker and the energy storage side circuit breaker to be disconnected, controlling the PCS power module to stop, and performing stop self-checking and stop timing; the PCS controller is powered by the uninterruptible power supply UPS in the processes of stopping self-checking and stopping timing.
5. The system of claim 4, wherein the PCS controller is further configured to control the energy storage side circuit breaker to close and to control the PCS power module to reset, standby and start to operate in an off-grid mode when the shutdown self-test is determined to pass and a time period of a shutdown timer exceeds a set time period.
6. The system of claim 5 wherein the PCS controller is further configured to determine if the magnitude and phase of the first voltage is synchronized with the magnitude and phase of the second voltage when determining that the ac bus is powered up based on the first voltage, and if the magnitude and phase of the first voltage is synchronized with the magnitude and phase of the second voltage, then to control the user side circuit breaker to close to operate the PCS power module in a grid-tie mode.
7. An electronic device, comprising:
At least one processor; and
A memory communicatively coupled to the at least one processor; wherein,
The memory stores instructions executable by the at least one processor to enable the at least one processor to perform the black start method of the high voltage direct hanging energy storage system of any one of claims 1-3.
8. A computer readable storage medium having stored thereon computer program instructions, which when executed by a processor, implements a black start method of a high voltage direct hanging energy storage system as claimed in any of claims 1-3.
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| CN202410246438.1A CN117833323B (en) | 2024-03-05 | High-voltage direct-hanging energy storage system, black start method thereof, electronic equipment and storage medium |
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