Uninterruptible power supply method, system and device for power distribution area and electronic equipment

Abstract

The invention discloses an uninterruptible power supply method, system and device for a power distribution area and electronic equipment. The system comprises a control system, a monitoring device, a diesel generator car, an energy storage car, an automatic change-over switch and a solid-state change-over switch, and is characterized in that the monitoring device is used for collecting electric power parameter information of an uninterruptible power supply system of a power distribution area and sending electric power parameters to the control system; and the control system is used for determining an uninterruptible power supply strategy of the power distribution area based on the electric power parameter information so as to determine whether to supply power to the power distribution area through the diesel power generation vehicle or the energy storage vehicle by controlling the on-off states of the automatic change-over switch and the solid-state change-over switch. According to the invention, the technical problem that the power supply stability is poor when the diesel generator car uninterruptedly supplies power to the power distribution area due to the power flow reverse transmission phenomenon generated when the photovoltaic system is connected to the power distribution area in the related technology is solved.

Description

Technical Field

[0001] The present invention relates to the field of power supply for distribution station areas, and in particular to a method, system, device and electronic equipment for uninterruptible power supply for distribution station areas. Background Art

[0002] The power company needs to inspect and maintain the power equipment every year. During the inspection and maintenance of the distribution station equipment, diesel generators are generally used to supply power to the users in the distribution station area to achieve uninterrupted power supply to the users in the distribution station area.

[0003] However, as the number of photovoltaic systems connected to distribution stations gradually increases, the power fluctuations of the photovoltaic systems are large, and even the phenomenon of reverse flow may occur. The diesel generator power supply system itself has insufficient anti-interference performance. When reverse flow occurs in the photovoltaic system, the diesel generator may produce supply voltage and frequency fluctuations, and may even be unable to supply power to the distribution station area normally.

[0004] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0005] The embodiments of the present invention provide a method, system, device and electronic device for uninterruptible power supply to a distribution station area, so as to at least solve the technical problem of poor power supply stability when a diesel generator truck provides uninterruptible power supply to a distribution station area due to the reverse flow phenomenon caused by the connection of a photovoltaic system to a distribution station area in the related technology.

[0006] According to one aspect of an embodiment of the present invention, there is provided an uninterruptible power supply system for a distribution station area, comprising a control system, a monitoring device, a diesel generator vehicle, an energy storage vehicle, an automatic transfer switch, and a solid-state switching switch, wherein a first input end of the automatic transfer switch is connected to a mains power supply, a second input end of the automatic transfer switch is connected to an output end of the solid-state switching switch, the output end of the automatic transfer switch is connected to an AC busbar of a distribution station area, a first input end of the solid-state switching switch is connected to the diesel generator vehicle, and a second input end of the solid-state switching switch is connected to the energy storage vehicle; the monitoring device is used to collect power parameter information of an uninterruptible power supply system of a distribution station area, and send the power parameters to the control system; the control system is used to determine an uninterruptible power supply strategy for the distribution station area based on the power parameter information.

[0007] According to another aspect of an embodiment of the present invention, a method for uninterruptible power supply to a distribution station area is provided, which is applied to the uninterruptible power supply system of the distribution station area, and the method comprises: in response to the maintenance operation of the mains power supply of the distribution station area, controlling the start-up of a diesel generator truck to access the distribution station area, so that the mains power supply and the diesel generator truck can simultaneously supply power to the distribution station area; increasing the output power of the diesel generator truck according to a predetermined adjustment strategy through the control system, and when the output power of the diesel generator truck meets the load demand of the distribution station area, controlling the mains power supply to stop supplying power to the distribution station area, and collecting power parameter information, wherein the power parameter information at least includes The invention comprises: the voltage and current of the two input ends of the automatic transfer switch, the voltage and current of the two input ends of the solid-state switching switch, the voltage and current of the output end of the automatic transfer switch, the voltage and current output by the photovoltaic system connected to the AC bus of the distribution station area, and the charge state of the energy storage vehicle; based on the power parameter information, determining the uninterruptible power supply strategy of the distribution station area, wherein the uninterruptible power supply strategy is used to determine whether to supply power to the distribution station area through the diesel generator vehicle or the energy storage vehicle by controlling the switching states of the automatic transfer switch and the solid-state switching switch; supplying power to the distribution station area according to the uninterruptible power supply strategy.

[0008] According to another aspect of an embodiment of the present invention, an uninterruptible power supply device for a distribution station area is also provided, comprising: a diesel generator vehicle access module, which is used to control the start of the diesel generator vehicle to access the distribution station area in response to the maintenance operation of the mains power supply of the distribution station area, so that the mains power supply and the diesel generator vehicle can simultaneously supply power to the distribution station area; a collection module, which is used to increase the output power of the diesel generator vehicle according to a predetermined adjustment strategy through the control system, and when the output power of the diesel generator vehicle meets the load demand of the distribution station area, control the mains power supply to stop supplying power to the distribution station area, and collect power parameter information, wherein the power parameter information at least includes: the two-way automatic transfer switch The voltage and current of the input end, the voltage and current of the two input ends of the solid-state switching switch, the voltage and current of the output end of the automatic transfer switch, the voltage and current output of the photovoltaic system connected to the AC bus of the distribution station area, and the charge state of the energy storage vehicle; an uninterruptible power supply strategy determination module, which is used to determine the uninterruptible power supply strategy of the distribution station area based on the power parameter information, wherein the uninterruptible power supply strategy is used to determine whether the distribution station area is powered by the diesel generator vehicle or the energy storage vehicle by controlling the switching states of the automatic transfer switch and the solid-state switching switch; a power supply module, which is used to power the distribution station area according to the uninterruptible power supply strategy.

[0009] According to another aspect of an embodiment of the present invention, a non-volatile storage medium is provided, wherein the non-volatile storage medium stores a plurality of instructions, wherein the instructions are suitable for being loaded by a processor and executed by any one of the methods for uninterruptible power supply to a distribution station area.

[0010] According to another aspect of an embodiment of the present invention, there is also provided an electronic device, comprising one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement any one of the methods for uninterruptible power supply to a distribution station area.

[0011] In an embodiment of the present invention, an uninterruptible power supply system for a distribution station area is provided, which includes a control system, a monitoring device, a diesel generator truck, an energy storage truck, an automatic transfer switch, and a solid-state switching switch, wherein a first input end of the automatic transfer switch is connected to a mains power supply, a second input end of the automatic transfer switch is connected to an output end of the solid-state switching switch, an output end of the automatic transfer switch is connected to an AC busbar of the distribution station area, a first input end of the solid-state switching switch is connected to the diesel generator truck, and a second input end of the solid-state switching switch is connected to the energy storage truck; the monitoring device is used to collect power parameter information of the uninterruptible power supply system of the distribution station area, and send the power parameters to the control system; the control system is used to determine the uninterruptible power supply strategy of the distribution station area based on the power parameter information. The purpose of controlling the switching between the diesel generator car and the energy storage car to supply power to the distribution station area is achieved based on the power parameters of the diesel generator car, the power parameters of the photovoltaic system and the charge state of the energy storage car, thereby realizing the technical effect that the power supply system can provide stable and uninterrupted power supply to the distribution station area when the photovoltaic system has a reverse flow phenomenon, thereby solving the technical problem of poor power supply stability when the diesel generator car provides uninterrupted power supply to the distribution station area due to the reverse flow phenomenon caused by the photovoltaic system being connected to the distribution station area in the related technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0013] Figure 1 is a schematic structural diagram of an uninterruptible power supply system for a distribution station area according to an embodiment of the present invention;

[0014] Figure 2 It is a schematic diagram of the structure of an uninterruptible power supply system for a distribution station area according to an embodiment of the present invention;

[0015] Figure 3is a basic topology diagram of an optional solid-state switch according to an embodiment of the present invention;

[0016] Figure 4 is a flow chart of a method for uninterruptible power supply to a distribution station area according to an embodiment of the present invention;

[0017] Figure 5 is a flow chart of an optional uninterruptible power supply method for a distribution station area according to an embodiment of the present invention;

[0018] Figure 6 The present invention is a schematic structural diagram of an uninterruptible power supply device for a distribution station area according to an embodiment of the present invention. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0020] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0021] First, to facilitate understanding of the embodiments of the present invention, some terms or nouns involved in the present invention are explained below:

[0022] Flow reversal refers to the phenomenon that the flow direction on the power grid bus is opposite to that under normal circumstances due to the intermittent and unstable nature of distributed photovoltaic power generation systems. When the distributed photovoltaic power generation suddenly increases or decreases, it may cause the flow direction in the power grid bus to reverse, that is, the power flows from the user end to the power generation end, which may affect the stability and security of the power grid.

[0023] Synchronous grid connection refers to the process of connecting multiple power supply systems or power grids together so that they operate at the same frequency and phase to share load and improve system stability.

[0024] According to an embodiment of the present invention, there is also provided an embodiment of a system for uninterrupted power supply to a distribution station area. Figure 1 is a schematic diagram of the structure of an uninterruptible power supply system for a distribution station area according to an embodiment of the present invention. Figure 1 As shown, the system includes a control system 10, a monitoring device 12, a diesel generator vehicle 14, an energy storage vehicle 16, an automatic transfer switch 18, and a solid-state switching switch 20, wherein:

[0025] A first input end of the automatic transfer switch 18 is connected to the mains power supply, a second input end of the automatic transfer switch 18 is connected to an output end of the solid-state switch 20, the output end of the automatic transfer switch 18 is connected to an AC busbar of a distribution station area, a first input end of the solid-state switch 20 is connected to a diesel generator vehicle 14, and a second input end of the solid-state switch 20 is connected to an energy storage vehicle 16;

[0026] The monitoring device 12 is used to collect power parameter information of the uninterruptible power supply system in the distribution station area and send the power parameters to the control system 10;

[0027] The control system 10 is used to determine the uninterruptible power supply strategy of the distribution station area based on the power parameter information.

[0028] Optionally, the uninterruptible power supply strategy is used to control the switch states of the automatic transfer switch 18 and the solid-state switch 20 to determine whether to supply power to the distribution station area through the diesel generator vehicle 14 or the energy storage vehicle 16.

[0029] In an embodiment of the present invention, a first input end of an automatic transfer switch 18 is connected to a mains power supply, a second input end of the automatic transfer switch 18 is connected to an output end of a solid-state switch 20, the output end of the automatic transfer switch 18 is connected to an AC busbar of a distribution station area, a first input end of the solid-state switch 20 is connected to a diesel generator truck 14, and a second input end of the solid-state switch 20 is connected to an energy storage truck 16; a monitoring device 12 is connected to a control system 10, and is used to collect power parameters of the diesel generator truck 14, power parameters of the photovoltaic system, and a state of charge of the energy storage truck 16, and send the power parameters of the diesel generator truck 14, power parameters of the photovoltaic system, and the state of charge of the energy storage truck 16 to the control system 10; the control system 10 is used to determine an uninterruptible power supply strategy for the distribution station area based on the power parameters of the diesel generator truck 14, power parameters of the photovoltaic system, and the state of charge of the energy storage truck 16, wherein the uninterruptible power supply strategy is used to determine whether the distribution station area is powered by the diesel generator truck 14 or the energy storage truck 16 by controlling the switch states of the automatic transfer switch 18 and the solid-state switch 20. The purpose of supplying power to the distribution station area is achieved by collecting and controlling the switching states of the automatic transfer switch 18 and the solid-state switching switch 20 through real-time data collection, controlling the switching between the diesel generator truck and the energy storage truck, thereby achieving the technical effect that when the photovoltaic system has a reverse flow phenomenon, the power supply system can provide stable and uninterrupted power supply to the distribution station area, thereby solving the technical problem of poor power supply stability when the diesel generator truck provides uninterrupted power supply to the distribution station area due to the reverse flow phenomenon caused by the photovoltaic system being connected to the distribution station area in the related technology.

[0030] Optional, Figure 2 FIG. 1 is a schematic diagram of the structure of an uninterruptible power supply system for a distribution station area according to an embodiment of the present invention. Figure 2 As shown, based on the connection relationship, the AC bus adopts a bus voltage of 400V, and one end of the AC bus is connected to multiple loads and a distributed photovoltaic system, wherein the photovoltaic system includes a photovoltaic power generation unit, a photovoltaic inverter, and an energy storage unit connected in parallel with the photovoltaic power generation unit. Specifically, the energy storage unit is used to preferentially supply power to the loads in the distribution area, reduce the configuration capacity of the diesel generator car and the energy storage car, thereby smoothing the output power fluctuation of the photovoltaic power generation unit, so as to achieve the technical effect that the power supply system can provide stable and uninterrupted power to the distribution area. The other end of the AC bus is connected to the diesel generator car, the energy storage car, and the mains power supply. When the load power is suddenly reduced during the maintenance of the mains power supply, the photovoltaic system (will) be reversed to the 400V AC bus. By controlling the power supply switching between the diesel generator car and the energy storage car, the energy storage car is connected to the AC bus, and the energy storage car is used to absorb the reverse power of the photovoltaic system, the technical effect of the power supply system providing stable and uninterrupted power to the distribution area can be effectively achieved.

[0031] Optionally, monitoring equipment is configured at key locations of the power supply system. The main monitoring status of the monitoring equipment includes: the voltage and current of the two incoming lines of the automatic transfer switch (ATS), the voltage and current of the two incoming lines of the solid state toggle switch (SSTS), the voltage and current of the ATS output line, the voltage and current of the photovoltaic system output, the state of charge (SOC) of the energy storage vehicle, etc. The monitoring information is transmitted to the control system to provide a basis for the control system to make power supply switching decisions between the diesel generator vehicle and the energy storage vehicle.

[0032] like Figure 2 As shown, the uninterruptible power supply system of the distribution station area also includes: an automatic transfer switch and a solid-state switching switch, wherein a first input end of the automatic transfer switch is connected to the mains power supply, a second input end of the automatic transfer switch is connected to an output end of the solid-state switching switch, the output end of the automatic transfer switch is connected to an AC busbar of the distribution station area, a first input end of the solid-state switching switch is connected to a diesel generator vehicle, and a second input end of the solid-state switching switch is connected to an energy storage vehicle.

[0033] Based on the connection relationship, the automatic transfer switch (ATS) includes two input terminals, wherein the first input terminal (A1) is connected to the 400 volt (V) AC power supply, and the second input terminal (A2) is connected to the solid-state switching switch SSTS; the SSTS also includes two input terminals, the first input terminal (K1) is connected to the diesel generator car, and the second input terminal (K2) is connected to the energy storage car. The output terminal of the ATS is connected to the 400V AC bus of the distribution station area.

[0034] Under normal power supply conditions (i.e. when the mains power supply is not under maintenance), the first input terminal of the ATS is closed, and the mains power supply supplies power to the loads in the distribution area. When the mains power supply is under maintenance, the first input terminal of the ATS is disconnected, and the second input terminal is closed, so that the diesel generator truck or the energy storage truck supplies power to the loads in the distribution area through the second input terminal of the ATS. At the same time, the two switches of the SSTS can be switched based on the power parameters of the diesel generator truck, the power parameters of the photovoltaic system, and the charge state of the energy storage truck. When the diesel generator truck is required to supply power, the first input terminal is closed and the second input terminal is disconnected. When the energy storage truck is required to supply power, the first input terminal is disconnected and the second input terminal is closed. This is to achieve stable and uninterrupted power supply to the loads in the distribution area by controlling the power supply system based on the closing conditions of AST and SSTS.

[0035] Through the above structure, through the joint power supply mode of ATS, SSTS, diesel generator trucks and energy storage trucks, the power supply path between the mains power supply and the power supply equipment is converted based on ATS during non-stop operation; based on SSTS, fast switching between the diesel generator truck and the energy storage truck is achieved, which can effectively avoid the problem of reverse power protection tripping of the diesel generator truck caused by the reverse power flow of the distributed photovoltaic system, and achieve the technical effect of stable and uninterrupted power supply from the power supply system to the distribution station area.

[0036] Optional, solid-state transfer switch SSTS basic topology such as Figure 3 As shown, Figure 3 This is a basic topology diagram of an optional solid-state switch according to an embodiment of the present invention. The solid-state switch is mainly composed of a solid-state switch (Silicon Controlled Rectifier, SCR) based on a thyristor valve body, a bypass and isolating switch, a voltage transformer, a current transformer, a control system, and a human-computer interaction interface. Specifically, the solid-state switch is composed of a pair of anti-parallel thyristors, each of which conducts the corresponding half cycle. According to the rated voltage and current of the AC bus, the solid-state switch is composed of thyristors in series and parallel to form a thyristor valve body. Under normal power supply conditions, power supply 1 (diesel generator car) is used for power supply, then solid-state switch 1 (first input end) is turned on, solid-state switch 2 (second input switch) is in a disconnected state, and current flows through solid-state switch 1; when the photovoltaic system has a flow reverse phenomenon, causing power supply 1 (diesel generator car) to fail, or actively switch to power supply 2 (energy storage car), solid-state switch 1 is disconnected and solid-state switch 2 is turned on, the load is powered by power supply 2, and current flows through solid-state switch 2.

[0037] Optionally, the isolation and bypass switches include multiple, such as Figure 2 As shown, K1 to K3 are isolating switches, and K4 and K5 are bypass switches. Under normal circumstances, the current flows through the solid-state switch, and the switching between power source 1 and power source 2 is completed by the solid-state switch. At this time, the isolating switch is in the on state, and the bypass switch is in the off state; when the solid-state switch fails or requires regular maintenance, the bypass switch is turned on and the isolating switch is turned off. At this time, the SSTS is similar to a traditional power switching device to ensure that the normal power supply of the distribution station area is not affected to the greatest extent.

[0038] Optionally, the voltage transformer and the current transformer are both signal sampling devices, and the voltage data and current data are obtained through the voltage transformer and the current transformer for analysis and judgment by the control system. Among them, the control system is the core of the entire SSTS, which can perform sampling, processing, analysis and calculation, switch action and protection of various signals, thereby controlling the switching of the SSTS to achieve uninterrupted power supply to the distribution station area.

[0039] According to an embodiment of the present invention, there is also provided a method embodiment for uninterrupted power supply to a distribution station area. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0040] Figure 4 is a flow chart of an uninterruptible power supply method for a distribution station area according to an embodiment of the present invention. Figure 4 As shown, the method is applied to the above-mentioned uninterruptible power supply system of the distribution station area, and the method comprises the following steps:

[0041] Step S102, in response to the maintenance operation of the mains power supply of the distribution station area, control the start-up of the diesel generator truck to access the distribution station area, so that the mains power supply and the diesel generator truck can supply power to the distribution station area at the same time;

[0042] Optionally, the executor of the method of this embodiment may be a control system in the uninterruptible power supply system of the above-mentioned distribution station area. When the mains power supply is not under maintenance, the mains power supply is used to access the AC bus, and the loads connected to the AC bus are powered by the mains power supply and the photovoltaic system in the distribution station area. When the mains power supply is under maintenance, it is necessary to partially or completely cut off the mains power supply, and a diesel generator truck is used to access the AC bus corresponding to the distribution station area to power the AC-connected loads.

[0043] In an optional embodiment, in response to the maintenance operation of the mains power supply of the distribution station area, the diesel generator car is controlled to be started to connect to the distribution station area, so that the mains power supply and the diesel generator car can supply power to the distribution station area at the same time, including: in response to the maintenance operation of the mains power supply of the distribution station area, the first input end of the solid-state switching switch is controlled to be closed, the second input end of the solid-state switching switch is disconnected, the diesel generator car is started, and the diesel generator car is controlled to output a three-phase voltage with the same frequency, amplitude, and phase sequence as the mains power supply; the voltages of the two input ends of the automatic transfer switch are synchronously checked, and when the voltages of the two input ends of the automatic transfer switch are consistent, the second input end of the automatic transfer switch is controlled to be closed, and quasi-synchronous grid connection is performed, so that the mains power supply and the diesel generator car can supply power to the distribution station area at the same time; wherein the first input end of the automatic transfer switch is used to control whether the mains power supply is connected to the distribution station area; the second input end of the automatic transfer switch is used to cooperate with the first input end of the solid-state switching switch to control whether the diesel generator car is connected to the distribution station area; the second input end of the automatic transfer switch is also used to cooperate with the second input end of the solid-state switching switch to control whether the energy storage vehicle is connected to the distribution station area.

[0044] Optionally, under normal power supply conditions, the mains power supply is used to power the distribution area to achieve stable power supply in the distribution area. The mains power supply refers to the power supply from the municipal power grid. After the mains power supply is stepped down by the substation and branched by the distribution device, it is transmitted to the distribution area through cables or wires to provide power for various equipment and facilities (loads) in the distribution area. In the case where the mains power supply needs to be repaired, power supply equipment (diesel generator trucks and energy storage trucks) are required to power the distribution area for a short time to meet the uninterrupted power supply needs of the distribution area.

[0045] Optionally, by controlling the first input end of the solid-state switch to close, the diesel generator car is isolated from the power grid, and then the diesel generator car is started and its output voltage is adjusted to be consistent with the voltage of the mains power supply in frequency, amplitude and phase sequence. This process can effectively avoid arcing, equipment damage or grid disturbance that may be caused by asynchronous closing, and ensure the smooth grid connection of the diesel generator car and the mains power supply. Quasi-synchronous grid connection is carried out through the automatic transfer switch to realize the parallel operation of the diesel generator car and the mains power supply, and then the power supply path of the mains power supply is gradually disconnected to ensure that the power supply of the substation is not affected during this process. This strategy can ensure that the power supply to the user end will not be interrupted during the mains maintenance, thereby improving the overall continuity and reliability of the power supply system. Based on the various power parameter information collected (especially the output current), the control system can intelligently determine when to switch the diesel generator car to the energy storage car for power supply, or vice versa. This strategy adjustment based on real-time data can quickly respond to grid changes, ensure the optimality and flexibility of the power supply strategy, and avoid waste of equipment resources. By monitoring the output current of the photovoltaic system, when the photovoltaic system generates sufficient power (the current is greater than the second preset current), the energy storage vehicle is used first, which can more effectively utilize photovoltaic power generation resources and reduce the use of diesel generators, thereby reducing the consumption of fossil fuels. According to the state of charge SOC of the energy storage vehicle and the output current of the photovoltaic system, the most appropriate power supply method is intelligently selected to avoid over-reliance on diesel generators, reduce diesel consumption and carbon emissions, and also reduce operating costs.

[0046] Optionally, the power supply equipment (diesel generator and energy storage vehicle) has multiple control functions such as constant power output, reactive power support, grid-connected and off-grid switching, and anti-islanding. At the same time, it can also support the access of all three-phase unbalanced loads to maintain the power supply to the distribution area. In addition, the power supply equipment also has complete protection functions, including but not limited to overcurrent protection, overvoltage protection, undervoltage protection, overfrequency protection, underfrequency protection, AC incoming line phase sequence error protection, communication fault protection and battery protection, which can effectively protect the safety and stability of the power distribution process.

[0047] Optionally, the internal equipment of the energy storage vehicle is mainly composed of battery packs, battery management systems, energy storage inverters, control systems, fast switching switches, coordinated control systems, battery safety warning systems, fire protection systems, fast connection systems and DC charging systems. The energy storage vehicle can ensure reliable power supply to the connected loads.

[0048] Step S104, increasing the output power of the diesel generator car according to a predetermined adjustment strategy through the control system, when the output power of the diesel generator car meets the load demand of the distribution station area, controlling the mains power supply to stop supplying power to the distribution station area, and collecting power parameter information, wherein the power parameter information at least includes: the voltage and current of the two input ends of the automatic transfer switch, the voltage and current of the two input ends of the solid-state switching switch, the voltage and current of the output end of the automatic transfer switch, the voltage and current output of the photovoltaic system connected to the AC bus of the distribution station area, and the charge state of the energy storage vehicle;

[0049] Optionally, the two input ends of the automatic transfer switch are the first input end and the second input end of the automatic transfer switch, and the two input ends of the solid-state switch are the first input end and the second input end of the solid-state switch. Before the mains power supply is overhauled, the diesel generator car is started and its output is controlled to be synchronized with the mains power supply (i.e., the frequency, amplitude, and phase sequence are consistent), and the automatic transfer switch is used for quasi-synchronous grid connection to realize the simultaneous power supply of the diesel generator car and the mains power supply. Then the power output of the diesel generator car is gradually adjusted until all the requirements of the load in the substation area are met. At this time, the mains power supply is disconnected, and the diesel generator car directly assumes the power supply task, which can ensure the seamless connection of the substation power supply during the mains maintenance and improve the continuity and reliability of the power supply. The collected power parameter information includes the voltage and current of the automatic transfer switch and the solid-state switch, the output voltage and current of the photovoltaic system, and the charge state SOC of the energy storage vehicle. This information can provide the control system with real-time grid status and equipment status data, so that the control system can make the optimal power supply strategy decision based on the current power supply situation, equipment status (such as the power output capacity of the diesel generator car and the energy storage car, and the power generation of the photovoltaic system) and load demand. Based on the collected power parameter information, the control system can intelligently determine when to switch the power supply from the diesel generator to the energy storage vehicle, or from the energy storage vehicle back to the diesel generator, in order to cope with the power fluctuations of distributed renewable energy (such as the increase or decrease in the power generation of the photovoltaic system) and the SOC state changes of the energy storage vehicle. This intelligent switching can avoid the problem of reverse power protection tripping of the diesel generator due to the reverse flow of distributed renewable energy, and can also optimize the use of diesel generators and energy storage vehicles, reduce unnecessary energy waste, and improve the overall efficiency of the system.

[0050] In an optional embodiment, when the output power of the diesel generator truck meets the load demand of the distribution station area, the AC power supply is controlled to stop supplying power to the distribution station area, including: when the output power of the diesel generator truck meets the load demand of the distribution station area, the first input terminal of the automatic transfer switch is controlled to be disconnected so that the AC power supply stops supplying power to the distribution station area.

[0051] Optionally, the first input terminal of the automatic transfer switch is connected to the AC power supply, and the second input terminal is connected to the diesel generator truck. When the diesel generator truck can supply the electric energy required for the load of the distribution station area, the first input terminal is disconnected and the second input terminal is closed, so that the diesel generator truck can be stably connected to the AC bus, thereby realizing the diesel generator truck to provide stable and uninterrupted power supply to the distribution station area corresponding to the AC bus.

[0052] Optionally, before the mains power supply is overhauled, the diesel generator car is started, and the output voltage of the diesel generator car is controlled to be a three-phase voltage with the same frequency, amplitude, and phase sequence as the voltage of the mains power supply; wherein the mains power supply is connected to the AC busbar through an automatic transfer switch (ATS). By performing a synchronous check on the two voltages, when the two voltages are consistent (the error is within the allowable preset error range), the second input terminal of the ATS is controlled to close for synchronous closing and grid connection.

[0053] Optionally, after synchronous closing and grid connection, the diesel generator truck runs in parallel with the mains power supply and supplies power to the load in the distribution area at the same time; at this time, the power output is gradually adjusted through the control system until the load demand of the distribution area is met. When the load demand is met, the first input terminal of the ATS is disconnected, and the diesel generator truck directly supplies power to the load, thereby ensuring the smooth switching of the power supply in the distribution area and improving the stability of the uninterrupted power supply in the distribution area.

[0054] Step S106, based on the power parameter information, determining the uninterruptible power supply strategy of the distribution station area, wherein the uninterruptible power supply strategy is used to determine whether to supply power to the distribution station area through a diesel generator truck or through an energy storage truck by controlling the switch states of the automatic transfer switch and the solid-state switch;

[0055] Optionally, after cutting off the first input terminal of the ATS, the power supply equipment connected to the second input terminal of the ATS is used to provide stable and uninterrupted power supply. However, since the photovoltaic system may have a phenomenon of power flow reverse transmission, which affects the stability of the power supply in the distribution station area, it is necessary to detect the power parameter information of the uninterruptible power supply system in the distribution station area (such as the voltage and current of the two input terminals of the automatic transfer switch, the voltage and current of the two input terminals of the solid-state switching switch, the voltage and current of the output terminal of the automatic transfer switch, the voltage and current output of the photovoltaic system connected to the AC bus of the distribution station area, the charge state of the energy storage vehicle, etc.). When the diesel generator truck cannot meet the uninterrupted power supply requirements of the distribution station area, the uninterruptible power supply strategy is replaced to ensure that the power supply equipment can provide stable and uninterrupted power supply to the distribution station area.

[0056] In an optional embodiment, when the power parameter is the output current, an uninterruptible power supply strategy for the distribution station area is determined based on the power parameter information, including: when the output current of the diesel generator vehicle is less than a first preset current, and the output current of the photovoltaic system is greater than a second preset current, determining the uninterruptible power supply strategy is to supply power to the distribution station area through the energy storage vehicle; or when the state of charge of the energy storage vehicle is lower than the preset state of charge, or the output current of the photovoltaic system is less than a third preset current, determining the uninterruptible power supply strategy is to supply power to the distribution station area through the diesel generator vehicle.

[0057] Optionally, when the diesel generator truck supplies power to the distribution station area load, when it is detected that the output current of the diesel generator truck is reduced to a certain range (lower than the first preset current) and the output current of the photovoltaic system is greater than a certain set value (the second preset current), the two switches of the solid-state switching switch SSTS are controlled to switch, and the power supply from the diesel generator truck is converted to the power supply of the energy storage vehicle, wherein the first input end of the SSTS is connected to the AC power supply, and the second input end of the SSTS is connected to the ATS.

[0058] Optionally, when the energy storage vehicle supplies power to the load in the distribution area, when it is detected that the battery state of charge SOC of the energy storage vehicle drops to a certain range (lower than the preset state of charge), or the output current of the photovoltaic system is less than a certain set value (the third preset current), the two switches of the SSTS are controlled to switch, and the power supply from the energy storage vehicle is converted to the power supply from the diesel generator vehicle. By setting the energy storage vehicle to supply power to the distribution area, not only can the power supply demand of the distribution area be guaranteed, but also when the photovoltaic system reverses the current to the AC bus, it can absorb the reverse power of the photovoltaic system, thereby improving the stability of the uninterrupted power supply in the distribution area.

[0059] Step S108, supplying power to the distribution station area according to the uninterruptible power supply strategy.

[0060] Optionally, based on the above-mentioned uninterruptible power supply strategy for the distribution station area, the state of the solid-state switching switch is adjusted to achieve two modes of adjusting the power supply of the diesel generator truck or the energy storage truck, so as to improve the stability of the uninterruptible power supply in the distribution station area.

[0061] In an optional embodiment, power is supplied to the distribution station area according to an uninterruptible power supply strategy, including: when the uninterruptible power supply strategy is to supply power to the distribution station area through an energy storage vehicle, controlling a first input terminal of the solid-state switching switch to be disconnected, and controlling a second input terminal of the solid-state switching switch to be closed, so that power is supplied to the distribution station area through the energy storage vehicle; or when the intermittent power supply strategy is to supply power to the distribution station area through a diesel generator vehicle, controlling a first input terminal of the solid-state switching switch to be closed, and controlling a second input terminal of the solid-state switching switch to be disconnected, so that power is supplied to the distribution station area through the diesel generator vehicle.

[0062] Optionally, when using power supply equipment for power supply, a solid-state switch SSTS is required to switch to realize the switching between power supply by diesel generator truck or power supply by energy storage truck. The solid-state switch includes two switches, wherein the first input end of the SSTS is connected to the diesel generator truck, and the second input end of the SSTS is connected to the energy storage truck, and the switching of the two switches is controlled to convert the power supply from the diesel generator truck to the energy storage truck.

[0063] In an optional embodiment, after supplying power to the distribution station area according to the uninterruptible power supply strategy, the method further includes: in response to the maintenance completion operation of the AC power supply of the distribution station area, performing a synchronous check on the voltages of the two input terminals of the automatic transfer switch, and when the voltages of the two input terminals of the automatic transfer switch are consistent, controlling the first input terminal of the automatic transfer switch to close, and performing quasi-synchronous grid connection, so that the AC power supply and the diesel generator truck can supply power to the distribution station area at the same time, or the AC power supply and the energy storage vehicle can supply power to the distribution station area at the same time; controlling the second input terminal of the automatic transfer switch to disconnect, the first input terminal of the solid-state switching switch to disconnect, and the second input terminal of the solid-state switching switch to disconnect, so that the distribution station area is powered solely by the AC power supply.

[0064] Optionally, after the mains power supply is overhauled, the two voltages of the ATS are checked for synchronization, and the first input terminal of the ATS is controlled to close for quasi-synchronous grid connection; after synchronous closing and grid connection, the diesel generator and the mains power supply simultaneously supply power to the load in the distribution station area; at this time, the second input terminal of the ATS is controlled to be disconnected and switched to mains power supply. This ensures smooth switching of power supply and improves the stability of uninterrupted power supply in the distribution station area.

[0065] Optionally, after the mains power supply is overhauled, the voltage of the two input terminals of the ATS is checked again by the control system. When the voltage of the two input terminals of the ATS is consistent (that is, the voltage of the diesel generator car / energy storage car is synchronized with the mains voltage), the first input terminal of the ATS is controlled to close and quasi-synchronous grid connection is performed. This process can ensure that the mains power supply after maintenance can smoothly transition with the power supply of the diesel generator car or energy storage car, avoiding the degradation of power quality or equipment damage that may be caused by asynchronous closing. After the overhaul is completed, the mains power supply can supply power to the distribution area for a period of time at the same time as the diesel generator car or energy storage car, which can not only increase the redundancy of the system and improve the reliability of power supply, but also during this transition period, the control system can further optimize the power supply strategy to ensure a smooth transition of power supply. After ensuring that the mains power supply is synchronized with the power supply of the diesel generator car or energy storage car, the control system will gradually disconnect the second input terminal of the ATS and the first or second input terminal of the SSTS, and finally realize that only the mains power supply is used to supply power to the distribution area. This process is automatically completed by the control system, which intelligently selects the best switching time based on current power parameter information (such as the status of the diesel generator vehicle, energy storage vehicle and photovoltaic system) and the availability of the mains power supply, thereby ensuring the continuity of power supply and the user's power experience.

[0066] Through the above steps S102 to S108, the purpose of controlling the switching between the diesel generator vehicle and the energy storage vehicle to supply power to the distribution station area can be achieved based on the power parameters of the diesel generator vehicle, the power parameters of the photovoltaic system and the charge state of the energy storage vehicle, thereby achieving the technical effect that when the photovoltaic system has a power flow reverse phenomenon, the power supply system can provide stable and uninterrupted power supply to the distribution station area, thereby solving the technical problem of poor power supply stability when the diesel generator vehicle provides uninterrupted power supply to the distribution station area due to the power flow reverse phenomenon caused by the photovoltaic system being connected to the distribution station area in the related technology.

[0067] Based on the above embodiments and optional embodiments, the present invention proposes an optional implementation mode: Figure 5 is a flow chart of an optional uninterruptible power supply method for a distribution station area according to an embodiment of the present invention, such as Figure 5 As shown, the method includes:

[0068] Step S1, before the mains power supply is overhauled, the diesel generator car is started, and the diesel generator car is controlled to output a three-phase voltage with the same frequency, amplitude, and phase sequence as the mains power supply; wherein the diesel generator car is connected to the first input end of the solid-state switching switch SSTS, the output end of the SSTS is connected to the second input end of the ATS, and the output end of the ATS is connected to the 400V AC busbar of the distribution station area. At the beginning, the first input end of the SSTS is in a conducting state.

[0069] By performing synchronization check on the two voltages, when the two voltages are consistent (the error is within the allowable preset error range), the second input terminal of the ATS is controlled to close for quasi-synchronous grid connection, wherein the first input terminal of the ATS is connected to the AC power supply, and the second input terminal of the ATS is connected to the output terminal of the SSTS.

[0070] Optionally, after synchronous closing and grid connection, the diesel generator truck runs in parallel with the mains power supply and supplies power to the load in the distribution area at the same time; at this time, the power output of the diesel generator truck is gradually adjusted through the control system until the load demand of the distribution area is met. When the load demand is met, the first input terminal of the ATS is disconnected, and the diesel generator truck directly supplies power to the load. This ensures the smooth switching of the power supply in the distribution area and improves the stability of the uninterrupted power supply in the distribution area.

[0071] Step S2, when the diesel generator truck supplies power to the distribution station area load, when it is detected that the output current of the diesel generator truck is reduced to a certain range (lower than the first preset current) and the output current of the photovoltaic system is greater than a certain set value (the second preset current), the two switches of the solid-state switching switch SSTS are controlled to switch, and the power supply from the diesel generator truck is converted to the power supply of the energy storage truck, wherein the first input end of the SSTS is connected to the diesel generator truck, and the second input end of the SSTS is connected to the energy storage truck.

[0072] Step S3, when the energy storage vehicle supplies power to the load in the distribution area, when it is detected that the battery state of charge SOC of the energy storage vehicle drops to a certain range (lower than the preset state of charge), or the output current of the photovoltaic system is less than a certain set value (the third preset current), the SSTS two-way switch is controlled to switch, and the power supply from the energy storage vehicle is converted to the power supply from the diesel generator vehicle. By setting the energy storage vehicle to supply power to the distribution area, not only can the power supply demand of the distribution area be guaranteed, but also when the photovoltaic system reverses the current to the AC bus, the reverse power of the photovoltaic system can be absorbed, thereby improving the stability of the uninterrupted power supply in the distribution area.

[0073] Step S4, when the mains power supply is overhauled, the two voltages of the ATS are checked for synchronization, and the first input terminal of the ATS is controlled to close for quasi-synchronous grid connection; after the synchronous closing and grid connection, the diesel generator (or energy storage vehicle) and the mains power supply simultaneously supply power to the distribution station area load; at this time, the second input terminal of the ATS is controlled to be disconnected and switched to mains power supply. This ensures smooth switching of power supply and improves the stability of uninterrupted power supply in the distribution station area.

[0074] Step S5, the control target of the diesel generator car is to output a voltage with the same voltage amplitude and frequency as the mains power supply; the control strategy is to adopt the active frequency control method (Pf droop control method) and the reactive voltage control method (QV droop control method). Among them, the Pf droop control method and the QV droop control method are the power frequency and reactive voltage control methods of the power system. Pf control refers to adjusting the output power of the power supply system according to the relationship between the output power and frequency of the power supply system so that it is consistent with the AC bus frequency; QV control refers to adjusting the output reactive power of the power supply system according to the relationship between the output reactive power and voltage of the power supply system so that it is consistent with the AC bus voltage. Droop control means that when the frequency or voltage of the AC bus changes, the power supply system makes corresponding adjustments according to the set droop parameters to maintain the stability of the AC bus frequency or voltage.

[0075] Step S6, the control target of the energy storage vehicle is to output a voltage with the same voltage amplitude and frequency as the diesel generator vehicle, and at the same time, when the photovoltaic system reverses the power flow to the power grid, it absorbs the reverse power of the photovoltaic system. The control strategy includes power outer loop control and voltage and current inner loop control. The power outer loop includes an active loop and a reactive loop. The output of the active loop is used as the frequency and phase of the output voltage modulation wave of the energy storage vehicle, and the output of the reactive loop is used as the amplitude of the output voltage modulation wave of the energy storage vehicle. The active loop simulates the synchronous generator rotor motion equation to realize the active power-frequency characteristics of the energy storage vehicle, and the reactive loop simulates the excitation system of the synchronous generator to realize the reactive power-voltage characteristics of the energy storage vehicle.

[0076] Step S7, the control target of the photovoltaic system is to output a smooth power curve; the control strategy is constant voltage control, giving priority to powering the loads in the distribution station area and minimizing the reverse power supplied by the photovoltaic system to the 400V AC bus, wherein the photovoltaic system includes a photovoltaic inverter and an energy storage unit.

[0077] Through the above steps S1 to S7, the coordinated control of the distributed photovoltaic system and its configured energy storage unit can, on the one hand, smooth the fluctuation of the photovoltaic system output power, and the photovoltaic system will give priority to supplying power to the load in the distribution area, reducing the configuration capacity of the diesel generator car and the energy storage car; on the other hand, it can also minimize the reverse power of the photovoltaic system to the 400V AC bus. At the same time, in the case where the load power suddenly decreases and the photovoltaic system (is about to) reverse the power flow to the 400V AC bus, by controlling the SSTS to switch quickly, the energy storage car is connected to the AC bus, and the energy storage car is used to absorb the reverse power of the photovoltaic system, which can effectively achieve the technical effect of stable and uninterrupted power supply from the power supply system to the distribution area, thereby solving the technical problem of poor power supply stability when the diesel generator car provides uninterrupted power supply to the distribution area due to the reverse power flow phenomenon caused by the photovoltaic system connected to the distribution area in the related technology.

[0078] In this embodiment, an uninterruptible power supply device for a distribution station area is also provided, which is used to implement the above-mentioned embodiments and preferred implementation modes, and will not be repeated hereafter. As used below, the terms "module" and "device" can implement a combination of software and / or hardware for a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0079] According to an embodiment of the present invention, there is also provided an embodiment of a device for implementing the above-mentioned method for uninterruptible power supply to a distribution station area. Figure 6 is a schematic diagram of the structure of an uninterruptible power supply device for a distribution station area according to an embodiment of the present invention. Figure 6 As shown, the above-mentioned uninterruptible power supply device for the distribution station area includes: a diesel generator vehicle access module 201, a collection module 202, an uninterruptible power supply strategy determination module 203 and a power supply module 204, wherein:

[0080] The diesel generator vehicle access module 201 is used to control the start of the diesel generator vehicle to access the distribution station area in response to the maintenance operation of the mains power supply of the distribution station area, so that the mains power supply and the diesel generator vehicle can supply power to the distribution station area at the same time;

[0081] The acquisition module 202 is connected to the diesel generator vehicle access module 201, and is used to increase the output power of the diesel generator vehicle according to a predetermined adjustment strategy through the control system. When the output power of the diesel generator vehicle meets the load demand of the distribution station area, the mains power supply is controlled to stop supplying power to the distribution station area, and power parameter information is collected, wherein the power parameter information at least includes: the voltage and current of the two input ends of the automatic transfer switch, the voltage and current of the two input ends of the solid-state switching switch, the voltage and current of the output end of the automatic transfer switch, the voltage and current of the photovoltaic system output connected to the AC bus of the distribution station area, and the charge state of the energy storage vehicle;

[0082] The uninterruptible power supply strategy determination module 203 is connected to the acquisition module 202 and is used to determine the uninterruptible power supply strategy of the distribution station area based on the power parameter information, wherein the uninterruptible power supply strategy is used to control the switch state of the automatic transfer switch and the solid-state switch to determine whether to supply power to the distribution station area through the diesel generator truck or the energy storage truck;

[0083] The power supply module 204 is connected to the uninterruptible power supply strategy determination module 203 and is used to supply power to the distribution station area according to the uninterruptible power supply strategy.

[0084] It should be noted that the above modules can be implemented by software or hardware. For example, for the latter, it can be implemented in the following ways: the above modules can be located in the same processor; or the above modules can be located in different processors in any combination.

[0085] It should be noted that the diesel generator vehicle access module 201, the acquisition module 202, the uninterruptible power supply strategy determination module 203 and the power supply module 204 correspond to steps S102 to S108 in the embodiment, and the examples and application scenarios implemented by the modules and the corresponding steps are the same, but are not limited to the contents disclosed in the above embodiments. It should be noted that the modules as part of the device can be run in a computer terminal.

[0086] It should be noted that the optional or preferred implementation of this embodiment can refer to the relevant description in the embodiment, which will not be repeated here.

[0087] The above-mentioned uninterruptible power supply device for the distribution station area may also include a processor and a memory. The above-mentioned diesel generator vehicle access module 201, acquisition module 202, uninterruptible power supply strategy determination module 203 and power supply module 204 are all stored in the memory as program modules, and the processor executes the above-mentioned program modules stored in the memory to realize the corresponding functions.

[0088] The processor includes a kernel, which retrieves the corresponding program module from the memory. The kernel may be one or more. The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. The memory includes at least one memory chip.

[0089] According to an embodiment of the present application, an embodiment of a non-volatile storage medium is also provided. Optionally, in this embodiment, the non-volatile storage medium includes a stored program, wherein when the program is executed, the device where the non-volatile storage medium is located is controlled to execute any of the above-mentioned uninterruptible power supply methods for distribution station areas.

[0090] Optionally, in this embodiment, the non-volatile storage medium may be located in any computer terminal in a computer terminal group in a computer network, or in any mobile terminal in a mobile terminal group, and the non-volatile storage medium includes a stored program.

[0091] Optionally, when the program is running, the device where the non-volatile storage medium is located is controlled to perform the following functions: in response to the maintenance operation of the AC power supply of the distribution station area, control the start-up of the diesel generator truck to connect to the distribution station area, so that the AC power supply and the diesel generator truck can supply power to the distribution station area at the same time; when the output voltage of the diesel generator truck is consistent with the output voltage of the AC power supply, control the AC power supply to stop supplying power to the distribution station area, and collect the power parameters of the diesel generator truck, the power parameters of the photovoltaic system and the charge state of the energy storage vehicle; based on the power parameters of the diesel generator truck, the power parameters of the photovoltaic system and the charge state of the energy storage vehicle, determine the uninterruptible power supply strategy of the distribution station area, wherein the uninterruptible power supply strategy is used to determine whether the distribution station area is powered by the diesel generator truck or the energy storage vehicle by controlling the switching state of the automatic transfer switch and the solid-state switching switch; and supply power to the distribution station area according to the uninterruptible power supply strategy.

[0092] According to an embodiment of the present application, an embodiment of a processor is also provided. Optionally, in this embodiment, the processor is used to run a program, wherein when the program is run, any of the above-mentioned uninterruptible power supply methods for a distribution station area is executed.

[0093] According to an embodiment of the present application, an embodiment of a computer program product is also provided. When executed on a data processing device, the computer program product is suitable for executing a program for initializing any of the above-mentioned steps of the method for uninterruptible power supply to a distribution station area.

[0094] Optionally, the above-mentioned computer program product, when executed on a data processing device, is suitable for executing a program that is initialized with the following method steps: in response to the maintenance operation of the AC power supply of the distribution station area, controlling the start-up of the diesel generator truck to connect to the distribution station area, so that the AC power supply and the diesel generator truck can simultaneously supply power to the distribution station area; when the output voltage of the diesel generator truck is consistent with the output voltage of the AC power supply, controlling the AC power supply to stop supplying power to the distribution station area, and collecting the power parameters of the diesel generator truck, the power parameters of the photovoltaic system and the charge state of the energy storage vehicle; based on the power parameters of the diesel generator truck, the power parameters of the photovoltaic system and the charge state of the energy storage vehicle, determining the uninterruptible power supply strategy of the distribution station area, wherein the uninterruptible power supply strategy is used to determine whether to supply power to the distribution station area by the diesel generator truck or the energy storage vehicle by controlling the switching state of the automatic transfer switch and the solid-state switching switch; and supplying power to the distribution station area according to the uninterruptible power supply strategy.

[0095] An embodiment of the present invention provides an electronic device, which includes a processor, a memory, and a program stored in the memory and executable on the processor, wherein the processor implements the following steps when executing the program: in response to a maintenance operation of a mains power supply of a distribution station area, controlling the start-up of a diesel generator vehicle to access the distribution station area so that the mains power supply and the diesel generator vehicle simultaneously supply power to the distribution station area; when the output voltage of the diesel generator vehicle is consistent with the output voltage of the mains power supply, controlling the mains power supply to stop supplying power to the distribution station area, and collecting power parameters of the diesel generator vehicle, power parameters of the photovoltaic system, and the charge state of the energy storage vehicle; based on the power parameters of the diesel generator vehicle, power parameters of the photovoltaic system, and the charge state of the energy storage vehicle, determining an uninterruptible power supply strategy for the distribution station area, wherein the uninterruptible power supply strategy is used to determine whether the distribution station area is supplied with power by the diesel generator vehicle or the energy storage vehicle by controlling the switch states of an automatic transfer switch and a solid-state switching switch; and supplying power to the distribution station area according to the uninterruptible power supply strategy.

[0096] The above sequence of the embodiments of the present invention is for description only and does not represent the superiority or inferiority of the embodiments.

[0097] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0098] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the above modules can be a logical function division. There may be other division methods in actual implementation, such as multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, modules or indirect coupling or communication connection of modules, which can be electrical or other forms.

[0099] The modules described above as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed on multiple modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0100] In addition, each functional module in each embodiment of the present invention may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of software functional modules.

[0101] If the above-mentioned integrated module is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable non-volatile storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a non-volatile storage medium, including a number of instructions to enable a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the various embodiments of the present invention. The aforementioned non-volatile storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0102] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An uninterruptible power supply system for a distribution station area, characterized in that: include: Control systems, monitoring equipment, diesel generators, energy storage vehicles, automatic transfer switches, solid-state transfer switches, among which, The first input end of the automatic transfer switch is connected to the mains power supply, the second input end of the automatic transfer switch is connected to the output end of the solid-state switch, the output end of the automatic transfer switch is connected to the AC bus of the power distribution station area, the first input end of the solid-state switch is connected to the diesel generator vehicle, and the second input end of the solid-state switch is connected to the energy storage vehicle; The monitoring device is used to collect power parameter information of the uninterruptible power supply system in the distribution station area and send the power parameters to the control system; The control system is used to determine the uninterruptible power supply strategy of the distribution station area based on the power parameter information.

2. A method for uninterrupted power supply in a distribution station area, characterized in that: The uninterruptible power supply system for distribution station area according to claim 1, wherein the method comprises: In response to the maintenance operation of the mains power supply of the distribution station area, control the start-up of the diesel generator truck to access the distribution station area, so that the mains power supply and the diesel generator truck can supply power to the distribution station area at the same time; The output power of the diesel generator truck is increased by the control system according to a predetermined adjustment strategy. When the output power of the diesel generator truck meets the load demand of the distribution station area, the mains power supply is controlled to stop supplying power to the distribution station area, and power parameter information is collected, wherein the power parameter information at least includes: the voltage and current of the two input ends of the automatic transfer switch, the voltage and current of the two input ends of the solid-state switching switch, the voltage and current of the output end of the automatic transfer switch, the voltage and current output of the photovoltaic system connected to the AC bus of the distribution station area, and the charge state of the energy storage vehicle; Based on the power parameter information, determine the uninterruptible power supply strategy of the distribution station area, wherein the uninterruptible power supply strategy is used to determine whether to supply power to the distribution station area through the diesel generator truck or the energy storage truck by controlling the switch states of the automatic transfer switch and the solid-state switch; The distribution station area is powered according to the uninterruptible power supply strategy.

3. The method according to claim 2, characterized in that In a case where the power parameter information is output current, determining the uninterruptible power supply strategy of the distribution station area based on the power parameter information includes: When the output current of the diesel generator vehicle is less than the first preset current and the output current of the photovoltaic system is greater than the second preset current, determining that the uninterruptible power supply strategy is to supply power to the distribution substation through the energy storage vehicle; or When the state of charge of the energy storage vehicle is lower than a preset state of charge, or the output current of the photovoltaic system is less than a third preset current, the uninterruptible power supply strategy is determined to supply power to the distribution substation area through the diesel generator vehicle.

4. The method according to claim 3, characterized in that In response to the maintenance operation of the mains power supply of the distribution station area, the control is to start the diesel generator truck to access the distribution station area, so that the mains power supply and the diesel generator truck can supply power to the distribution station area at the same time, including: In response to the maintenance operation of the mains power supply of the distribution station area, the first input end of the solid-state switch is controlled to be closed, the second input end of the solid-state switch is disconnected, the diesel generator car is started, and the diesel generator car is controlled to output a three-phase voltage with the same frequency, amplitude and phase sequence as the mains power supply; Perform synchronization check on the voltages of the two input terminals of the automatic transfer switch. When the voltages of the two input terminals of the automatic transfer switch are consistent, control the second input terminal of the automatic transfer switch to close and perform quasi-synchronous grid connection, so that the mains power supply and the diesel generator truck can supply power to the distribution station area at the same time; Among them, the first input end of the automatic transfer switch is used to control whether the AC power supply is connected to the distribution station area; the second input end of the automatic transfer switch is used to cooperate with the first input end of the solid-state switching switch to control whether the diesel generator vehicle is connected to the distribution station area; the second input end of the automatic transfer switch is also used to cooperate with the second input end of the solid-state switching switch to control whether the energy storage vehicle is connected to the distribution station area.

5. The method according to claim 4, characterized in that When the output power of the diesel generator truck meets the load demand of the power distribution station area, controlling the mains power supply to stop supplying power to the power distribution station area includes: When the output power of the diesel generator truck meets the load demand of the distribution station area, the first input end of the automatic transfer switch is controlled to be disconnected so that the commercial power supply stops supplying power to the distribution station area.

6. The method according to claim 4, characterized in that The step of supplying power to the distribution station area according to the uninterruptible power supply strategy includes: In the case where the uninterruptible power supply strategy is to supply power to the distribution station area through the energy storage vehicle, the first input end of the solid-state switch is controlled to be disconnected, and the second input end of the solid-state switch is controlled to be closed, so that the distribution station area is supplied with power through the energy storage vehicle; or When the intermittent power supply strategy is to supply power to the distribution station area through the diesel generator truck, the first input end of the solid-state switching switch is controlled to be closed, and the second input end of the solid-state switching switch is controlled to be disconnected, so that the distribution station area is supplied with power through the diesel generator truck.

7. The method according to claim 4, characterized in that After supplying power to the distribution station area according to the uninterruptible power supply strategy, the method further includes: In response to the maintenance completion operation of the mains power supply of the distribution station area, the voltages of the two input terminals of the automatic transfer switch are synchronously checked, and when the voltages of the two input terminals of the automatic transfer switch are consistent, the first input terminal of the automatic transfer switch is controlled to be closed, and quasi-synchronous grid connection is performed, so that the mains power supply and the diesel generator truck can simultaneously supply power to the distribution station area, or the mains power supply and the energy storage vehicle can simultaneously supply power to the distribution station area; The second input end of the automatic transfer switch is controlled to be disconnected, the first input end of the solid-state switch is disconnected, and the second input end of the solid-state switch is disconnected, so that the distribution station area is powered solely by the AC power supply.

8. An uninterruptible power supply device for a distribution station area, characterized in that: include: A diesel generator vehicle access module is used to control the start of the diesel generator vehicle to access the distribution station area in response to the maintenance operation of the mains power supply of the distribution station area, so that the mains power supply and the diesel generator vehicle can supply power to the distribution station area at the same time; A collection module is used to increase the output power of the diesel generator truck according to a predetermined adjustment strategy through a control system. When the output power of the diesel generator truck meets the load demand of the distribution station area, the mains power supply is controlled to stop supplying power to the distribution station area, and power parameter information is collected, wherein the power parameter information at least includes: the voltage and current of the two input ends of the automatic transfer switch, the voltage and current of the two input ends of the solid-state switching switch, the voltage and current of the output end of the automatic transfer switch, the voltage and current output of the photovoltaic system connected to the AC bus of the distribution station area, and the charge state of the energy storage vehicle; An uninterruptible power supply strategy determination module, used to determine the uninterruptible power supply strategy of the distribution station area based on the power parameter information, wherein the uninterruptible power supply strategy is used to determine whether to supply power to the distribution station area through the diesel generator truck or the energy storage truck by controlling the switch states of the automatic transfer switch and the solid-state switch; A power supply module is used to supply power to the distribution station area according to the uninterruptible power supply strategy.

9. A non-volatile storage medium, characterized in that: The non-volatile storage medium stores a plurality of instructions, and the instructions are suitable for being loaded by a processor and executing the uninterruptible power supply method for a distribution station area as described in any one of claims 2 to 7.

10. An electronic device, characterized in that: It comprises one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement the uninterruptible power supply method for a distribution station area as described in any one of claims 2 to 7.

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