Photovoltaic power storage system and load three-phase power control method, device and equipment

Abstract

The present disclosure relates to a photovoltaic power storage system and a load three-phase power control method, device and equipment. The photovoltaic power storage system load three-phase power control method includes: obtaining the power supply and feeding power of the power grid, the energy storage charging and discharging power, and the photovoltaic power generation power; determining the power generation power of the power system according to the power supply and feeding power of the power grid, the energy storage charging and discharging power, and the photovoltaic power generation power; and evenly distributing the power generation power of the power system to the load power consumption of each phase to achieve three-phase dynamic balance. The present disclosure can evenly distribute the power generation power of the power system to the load power consumption of each phase, thereby achieving three-phase dynamic balance.

Description

Technical Field

[0001] The present disclosure relates to the field of power control, and in particular to a photovoltaic power storage and utilization system and a load three-phase power control method, device and equipment. Background Art

[0002] Related technologies The commonly used AC transmission lines are three-phase four-wire systems, with three phases A, B, and C and a neutral line N. Taking household power supply as an example, the power voltage is AC 220V, connected between one of the three phases and the neutral line. Therefore, there are often high randomness in load use, a large proportion of single-phase loads, different load types, and sudden increases in load power, which lead to imbalance in the three phases at the AC end, thus affecting the safe operation of the entire power system and causing serious harm. Summary of the invention

[0003] In view of at least one of the above technical problems, the present disclosure provides a photovoltaic power storage system and its load three-phase power control method, device and equipment, which can evenly distribute the power generated by the power system to the load power of each phase, thereby achieving three-phase dynamic balance.

[0004] According to one aspect of the present disclosure, a method for controlling three-phase power of a load in a photovoltaic power storage and power utilization system is provided, comprising:

[0005] Obtain the power drawn from and fed into the power grid, the energy storage charging and discharging power, and the photovoltaic power generation power;

[0006] Determine the power generation power of the power system based on the power grid power intake and feed-in power, energy storage charging and discharging power, and photovoltaic power generation power;

[0007] Evenly distribute the power generated by the power system to the load power consumption of each phase to achieve three-phase dynamic balance.

[0008] In some embodiments of the present disclosure, obtaining the grid power and feed power, energy storage charging and discharging power, and photovoltaic power generation power includes:

[0009] By setting up energy routers on the grid side, energy storage device side and photovoltaic device side of the photovoltaic power storage system, the power drawn from the grid and fed back power, the energy storage charging and discharging power, and the photovoltaic power generation power can be obtained.

[0010] In some embodiments of the present disclosure, evenly distributing the power generated by the power system to the load power consumption of each phase to achieve three-phase dynamic balance includes:

[0011] The power consumption of each phase load at the AC power consumption end is obtained by setting up an energy router at each phase load at the AC power consumption end of the photovoltaic power storage system;

[0012] By setting up an energy router at each phase load of the AC power consumption end of the photovoltaic storage power consumption system, the power consumption of each phase load of the AC power consumption end is dispatched according to the power generation power of the power system.

[0013] In some embodiments of the present disclosure, scheduling the power consumption of each phase load at the AC power consumption end according to the power generation power of the power system includes:

[0014] The power consumption of each phase load at the AC power consumption end is scheduled to be equal, and the power consumption of each phase load at the AC power consumption end is scheduled to be equal to one third of the power generation power of the power system.

[0015] In some embodiments of the present disclosure, the step of scheduling the power consumption of each phase load at the AC power end to be equal, and scheduling the power consumption of each phase load at the AC power end to be equal to one third of the power generation power of the power system includes:

[0016] For each phase load at the AC power consumption end, comparing the power consumption of the load with the power generation power of the power system;

[0017] If the power consumption of the load is greater than one third of the power generation of the power system, the power consumption of the load is reduced by setting an energy router at the load so that the power consumption of the load is equal to one third of the power generation of the power system;

[0018] If the power consumption of the load is less than one third of the power generated by the power system, the power consumption of the load is increased by setting an energy router at the load so that the power consumption of the load is equal to one third of the power generated by the power system.

[0019] According to another aspect of the present disclosure, a three-phase power control device for a load of a photovoltaic power storage and utilization system is provided, comprising:

[0020] Power acquisition module, used to obtain power from the power grid and feed power, energy storage charging and discharging power, and photovoltaic power generation power;

[0021] The power generation determination module is used to determine the power generation power of the power system based on the power grid power intake and feed power, energy storage charging and discharging power, and photovoltaic power generation power;

[0022] The power dispatching module is used to evenly distribute the power generated by the power system to the load power consumption of each phase to achieve three-phase dynamic balance.

[0023] In some embodiments of the present disclosure, the three-phase power control device for a load of a photovoltaic power storage and utilization system is used to execute operations of a three-phase power control method for a load of a photovoltaic power storage and utilization system as described in any of the above embodiments.

[0024] According to another aspect of the present disclosure, a three-phase power control device for a load of a photovoltaic power storage and utilization system is provided, comprising:

[0025] A memory for storing instructions;

[0026] The processor is used to execute the instructions so that the three-phase power control device for the load of the photovoltaic power storage and utilization system performs the operation of implementing the three-phase power control method for the load of the photovoltaic power storage and utilization system as described in any of the above embodiments.

[0027] According to another aspect of the present disclosure, a three-phase power control device for a photovoltaic power storage system load is provided, including an energy router arranged on each phase load of a grid side, an energy storage device side, a photovoltaic device side and an AC power consumption end, and a three-phase power control device for a photovoltaic power storage system load as described in any of the above embodiments.

[0028] According to another aspect of the present disclosure, a photovoltaic power storage and utilization system is provided, comprising a photovoltaic power storage and utilization system load three-phase power control device as described in any of the above embodiments.

[0029] In some embodiments of the present disclosure, the photovoltaic power storage system is a photovoltaic air conditioning system.

[0030] According to another aspect of the present disclosure, a non-transitory computer-readable storage medium is provided, wherein the non-transitory computer-readable storage medium stores computer instructions, and when the instructions are executed by a processor, the three-phase power control method for the load of the photovoltaic power storage system as described in any of the above embodiments is implemented.

[0031] The present disclosure can evenly distribute the power generated by the power system to the load power consumption of each phase, thereby achieving three-phase dynamic balance. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 Schematic diagram of some embodiments of the three-phase power control device for the photovoltaic power storage system load disclosed in the present invention.

[0034] Figure 2 Schematic diagram of some embodiments of the photovoltaic power storage system disclosed in the present invention.

[0035] Figure 3 Schematic diagram of some embodiments of the three-phase power control method for a photovoltaic power storage system load disclosed in the present invention.

[0036] Figure 4 Schematic diagram of other embodiments of the three-phase power control method for the photovoltaic power storage system load disclosed in the present invention.

[0037] Figure 5 Schematic diagram of some embodiments of the three-phase power control device for the photovoltaic power storage system load disclosed in the present invention.

[0038] Figure 6 Schematic diagram of the structure of some other embodiments of the three-phase power control device for the load of the photovoltaic power storage system disclosed in the present invention. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0040] Unless specifically stated otherwise, the relative arrangement of components and steps, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure.

[0041] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0042] Technologies, methods, and apparatus known to ordinary technicians in the relevant field may not be discussed in detail, but where appropriate, such technologies, methods, and apparatus should be considered part of the authorization specification.

[0043] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0044] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0045] The inventors have found through research that the measures for managing three-phase imbalance in the power grid in related technologies mainly include load phase sequence balancing method and load compensation method. The load phase sequence balancing algorithm can improve the three-phase imbalance caused by uneven load distribution, but there are problems such as temporary power outage of the load during phase change, which affects the power supply quality of users; the load is suddenly connected to other phases, and the system reliability requirements are higher; the phase sequence needs to be manually adjusted in the low-voltage distribution network. The load compensation method quickly and effectively suppresses the three-phase load imbalance of the low-voltage distribution network, but the current load compensation device of the related technology has high investment cost and difficult maintenance technology, so it is difficult to promote in the power supply fields such as home buildings and rural residents. Therefore, the method of the related technology is difficult to promote and cannot fundamentally solve the problem.

[0046] In the photovoltaic storage air conditioning system of the related technology, the AC grid is connected in a three-phase four-wire system, and the single-phase 220V air conditioner is connected between one phase and the neutral line for power consumption. Because the power consumption of the air conditioning load is highly random and the power is high, it is common for one phase to be overloaded, and the power consumption between the phases is very different, which eventually leads to three-phase imbalance, reduced reliability of the power system, and potential safety hazards. The current solution of the related technology is to add a load compensation device to suppress it, but this method is costly, difficult to maintain, and not easy to promote.

[0047] In view of at least one of the above technical problems, the present disclosure provides a photovoltaic power storage system and a load three-phase power control method, device and equipment. The present disclosure is explained below through specific embodiments.

[0048] Figure 1 Schematic diagram of some embodiments of the three-phase power control device for the photovoltaic power storage system load disclosed in the present invention. Figure 1 As shown, the three-phase power control device for a photovoltaic power storage system load disclosed in the present invention may include an energy router 100 and a three-phase power control device 200 for a photovoltaic power storage system load, wherein:

[0049] A plurality of energy routers 100 are respectively arranged at the grid side, the energy storage device side, the photovoltaic device side and the energy router of each phase load at the AC power end.

[0050] The three-phase power control device 200 for the photovoltaic power storage system load is used to obtain the power intake and feeding power of the power grid, the energy storage charging and discharging power, and the photovoltaic power generation power; determine the power generation power of the power system according to the power intake and feeding power of the power grid, the energy storage charging and discharging power, and the photovoltaic power generation power; and evenly distribute the power generation power of the power system to the load power consumption of each phase to achieve three-phase dynamic balance.

[0051] In some embodiments of the present disclosure, when the power grid is in a power-drawing state, the power grid power-drawing and power-feeding power is the power grid power-drawing power.

[0052] In some other embodiments of the present disclosure, when the power grid is in a feeding state, the power grid power taken and fed is the power grid feeding power.

[0053] In some embodiments of the present disclosure, when the energy storage device is in a charging state, the energy storage charging and discharging power is the energy storage charging power.

[0054] In other embodiments of the present disclosure, when the energy storage device is in a discharging state, the energy storage charging and discharging power is the energy storage discharging power. In some embodiments of the present disclosure, the three-phase power control device 200 for the load of the photovoltaic storage and power consumption system can be used to obtain the grid power and feed power, energy storage charging and discharging power, and photovoltaic power generation power through energy routers arranged on the grid side, energy storage device side, and photovoltaic device side of the photovoltaic storage and power consumption system.

[0055] In some embodiments of the present disclosure, the three-phase power control device 200 for the photovoltaic power storage system load can be used to obtain the power consumption of each phase load at the AC power end through an energy router set at each phase load at the AC power end of the photovoltaic power storage system; and through an energy router set at each phase load at the AC power end of the photovoltaic power storage system, the power consumption of each phase load at the AC power end is scheduled according to the power generation power of the power system.

[0056] The present disclosure can evenly distribute the power generated by the power system to the load power consumption of each phase, thereby achieving three-phase dynamic balance.

[0057] According to another aspect of the present disclosure, a photovoltaic power storage system is provided, which may include any embodiment described in the present disclosure (for example Figure 1 Embodiment) The three-phase power control device for the photovoltaic power storage system load.

[0058] In some embodiments of the present disclosure, the photovoltaic power storage system may be a photovoltaic air conditioning system.

[0059] In some embodiments of the present disclosure, the load may be an air conditioner.

[0060] Figure 2 Schematic diagram of some embodiments of the photovoltaic power storage system disclosed in the present invention. Figure 2 In the illustrated embodiment, the photovoltaic power storage system is a photovoltaic air conditioning system; and the load is an air conditioner.

[0061] like Figure 2 As shown, the photovoltaic energy storage air conditioning system includes four parts: a power grid, a photovoltaic device, an energy storage device, and an air conditioner.

[0062] Figure 2 Schematic diagrams of other embodiments of the three-phase power control device for the photovoltaic power storage system load of the present disclosure are also provided. Figure 2As shown, the disclosed three-phase power control device for the photovoltaic power storage system load (such as Figure 2 The equipment in the dashed box) may include multiple energy routers 1-6 and a three-phase power control device 200 for a photovoltaic storage and power system load, wherein:

[0063] Energy router 1 is set on the grid side, energy router 2 is set on the photovoltaic device side, and energy router 3 is set on the energy storage device side. Energy routers 1-3 function as energy interfaces, and are used to obtain grid power, photovoltaic power, and energy storage charging and discharging power.

[0064] In some embodiments of the present disclosure, Figure 1 The energy router 100 of the embodiment is equivalent to Figure 2 Multiple energy routers 1-6 of the embodiment.

[0065] In some embodiments of the present disclosure, Figure 2 As shown, the air-conditioning power front end of the present invention is additionally added with energy routing devices 4-6, and communicates with the three-phase power control device 200 of the photovoltaic power storage system load, and the light-colored dotted line harness is the communication line.

[0066] In some embodiments of the present disclosure, Figure 2 As shown, energy routing devices 4-6 are between each phase and the power load. For example, energy routing device 4 is between phase A and the power load (air conditioners A1, A2, ...An); energy routing device 5 is between phase B and the power load (air conditioners B1, B2, ...Bn); energy routing device 6 is between phase B and the power load (air conditioners B1, B2, ...Bn).

[0067] In some embodiments of the present disclosure, Figure 2 As shown, adding energy routing devices 4-6 to the front end of the air conditioner power consumption can be used to monitor the voltage, current and other conditions between phases in real time to maintain power balance between phases.

[0068] In some embodiments of the present disclosure, energy routing devices 4-6 are used to control the flow of power, and cooperate with the three-phase power control device 200 of the photovoltaic power storage system load to monitor the power status of each phase in real time. By comparing the data of the energy routing devices 1-3, it is determined whether the power between the phases is dynamically balanced at this time, and the dynamic balance of the power between the three phases is achieved by compensating or limiting the power.

[0069] In some embodiments of the present disclosure, the energy routers 4-6 can be used to compensate for a phase if the power of the phase is less than the threshold value of the power that should be balanced at this time; conversely, if the power of a phase is greater than the threshold value of the power that should be balanced at this time, the power of the phase is limited until the three phases are dynamically balanced.

[0070] The energy routing device of the above-mentioned embodiment of the present disclosure mainly plays the role of monitoring and dispatching energy at the AC power consumption end, and can monitor the power changes in real time to ensure the dynamic balance of power among the three phases.

[0071] For an AC power grid, the above-mentioned embodiments of the present disclosure can reduce the loss of a power grid transformer and prevent malfunction of power grid protection elements.

[0072] For the electricity user, the above-mentioned embodiments of the present disclosure can solve the technical problem of poor electricity quality caused by uneven distribution of electricity load, and can also greatly reduce line losses and maintenance risks.

[0073] For the entire power system, the above-mentioned embodiments of the present disclosure, through autonomous control of the energy router, can completely solve the technical problem of unbalanced three-phase load caused by uneven distribution of air-conditioning load, thereby greatly improving system stability and eliminating safety hazards.

[0074] In the above-mentioned embodiment of the present disclosure, when the uneven distribution of air-conditioning load electricity leads to three-phase imbalance on the electricity consumption side, the energy routing device responds and adjusts immediately to ensure the safe and reliable operation of the power system.

[0075] The above-mentioned embodiments of the present disclosure can reduce line loss of the system, lower maintenance risks and potential safety hazards.

[0076] The above-mentioned embodiments of the present disclosure eliminate the need for load compensation devices, reduce the cost of the power system, and facilitate maintenance.

[0077] The above-mentioned embodiments of the present disclosure conform to the "dual carbon" development and build a new type of safe, stable and reliable power network.

[0078] The following is an introduction to the three-phase power control method and device of the photovoltaic power storage system load disclosed in the present invention through specific embodiments.

[0079] Figure 3 The present invention is a schematic diagram of some embodiments of the method for controlling the three-phase power of a load of a photovoltaic power storage system. Preferably, the present embodiment can be performed by the three-phase power control device for a load of a photovoltaic power storage system, the three-phase power control device for a load of a photovoltaic power storage system, or the photovoltaic power storage system. The method may include at least one of steps 31 to 33, wherein:

[0080] Step 31, the three-phase power control device of the photovoltaic power storage system load obtains the power drawn from and fed into the power grid, the energy storage charging and discharging power, and the photovoltaic power generation power.

[0081] In some embodiments of the present disclosure, step 31 may include: obtaining grid power intake and feeding power, energy storage charging and discharging power, and photovoltaic power generation power through energy routers arranged on the grid side, energy storage device side, and photovoltaic device side of the photovoltaic power storage system.

[0082] In some embodiments of the present disclosure, when the power grid is in a power-drawing state, the power grid power-drawing and power-feeding power is the power grid power-drawing power.

[0083] In some other embodiments of the present disclosure, when the power grid is in a feeding state, the power grid power taken and fed is the power grid feeding power.

[0084] In some embodiments of the present disclosure, when the energy storage device is in a charging state, the energy storage charging and discharging power is the energy storage charging power.

[0085] In some other embodiments of the present disclosure, when the energy storage device is in a discharging state, the energy storage charging and discharging power is the energy storage discharging power.

[0086] Step 32: The three-phase power control device of the photovoltaic power storage system load takes power from the grid and feeds power P gird , energy storage charging and discharging power P st , Photovoltaic power generation power P pv Determine the power generation power P of the power system x .

[0087] In some embodiments of the present disclosure, step 32 may include: taking power from the power grid and feeding power P gird , energy storage charging and discharging power P st , Photovoltaic power generation power P pv The sum of determines the power generation power P of the power system x , as shown in formula (1).

[0088] P gird +P st +P pv =P x =x(kW) (1)

[0089] In formula (1), the power generation power P of the power system can be set x The size is x(kW).

[0090] Step 33, the three-phase power control device of the photovoltaic power storage system load distributes the power generated by the power system evenly to the load power consumption of each phase to achieve three-phase dynamic balance.

[0091] In some embodiments of the present disclosure, step 33 may include: an energy router set up at each phase load of the AC power end of the photovoltaic power storage system can be used to monitor the power consumption of each phase of the air conditioning power end in real time and return the data for comparison.

[0092] In some embodiments of the present disclosure, step 33 may include: obtaining the power consumption of each phase load at the AC power end by setting up an energy router at each phase load at the AC power end of the photovoltaic storage power system; scheduling the power consumption of each phase load at the AC power end according to the power generation power of the power system by setting up an energy router at each phase load at the AC power end of the photovoltaic storage power system.

[0093] In some embodiments of the present disclosure, the step of scheduling the power consumption of each phase load at the AC power end according to the power generation power of the power system may include: scheduling the power consumption of each phase load at the AC power end (P A , P B , P C ) are scheduled to be equal, and the power consumption of each phase load at the AC power consumption end is scheduled to be equal to one third of the power generation power of the power system, as shown in formula (2).

[0094]

[0095] In some embodiments of the present disclosure, the step of scheduling the power consumption of each phase load at the AC power end to be equal, and scheduling the power consumption of each phase load at the AC power end to be equal to one-third of the power generation power of the power system may include: for each phase load at the AC power end, comparing the power consumption of the load with the power generation power of the power system; if the power consumption of the load is greater than one-third of the power generation power of the power system, reducing the power consumption of the load by setting an energy router at the load, so that the power consumption of the load is equal to one-third of the power generation power of the power system; if the power consumption of the load is less than one-third of the power generation power of the power system, increasing the power consumption of the load by setting an energy router at the load, so that the power consumption of the load is equal to one-third of the power generation power of the power system.

[0096] Figure 4 Schematic diagram of other embodiments of the method for controlling the three-phase power of the load of the photovoltaic power storage system disclosed in the present invention. Preferably, this embodiment can be performed by the three-phase power control device of the load of the photovoltaic power storage system disclosed in the present invention, the three-phase power control device of the load of the photovoltaic power storage system disclosed in the present invention, or the photovoltaic power storage system disclosed in the present invention. The method may include at least one step from step 41 to step 49, wherein:

[0097] Step 41, the power system is running.

[0098] Step 42: power grid power intake or power feeding, photovoltaic power generation, energy storage charging or discharging, and load power consumption (such as air conditioning load power consumption).

[0099] Step 43: Real-time system status of the energy router.

[0100] Step 44, determine whether the power consumption of each phase load at the AC power end is equal, as shown in formula (3); if the power consumption of each phase load at the AC power end is equal, then end; otherwise, if the power consumption of each phase load at the AC power end is not equal, execute step 45.

[0101] P A =P B =P C (3)

[0102] Step 45, obtaining the grid power and feed power, energy storage charging and discharging power, and photovoltaic power generation power; according to the grid power and feed power P gird , energy storage charging and discharging power P st , Photovoltaic power generation power P pv The sum of determines the power generation power P of the power system x , as shown in formula (1).

[0103] Step 46, determine whether the sum of the power consumption of each phase load at the AC power end is greater than the power generation power of the power system. If the sum of the power consumption of each phase load at the AC power end is greater than the power generation power of the power system, as shown in formula (4), then execute step 47; otherwise. If the sum of the power consumption of each phase load at the AC power end is less than the power generation power of the power system, as shown in formula (5), then execute step 48.

[0104] In step 47 , the energy router schedules the load (eg, air conditioning load) to limit power; then, step 49 is executed.

[0105] In some embodiments of the present disclosure, step 47 may include: when energy storage and photovoltaic power generation are insufficient, as shown in formula (4):

[0106] P A +P B +P C >P x (4)

[0107] The excessive or sudden increase in air conditioning load on one phase of the AC power consumption side causes three-phase imbalance. To ensure the safe and stable operation of the power grid and the entire power system, the energy router controls the average power distribution among the three phases until the three phases are dynamically balanced.

[0108] In step 48, the energy router dispatches power to each phase; then executes step 49.

[0109] In some embodiments of the present disclosure, step 48 may include: when the energy storage and photovoltaic power are sufficient, as shown in formula (5):

[0110] P A +P B +PC <P x (5)

[0111] Through the management of the energy routing system, the three-phase electric power is evenly distributed to the air conditioning load power consumption of each phase to achieve three-phase balance.

[0112] Step 49, dispatching the power consumption of each phase load at the AC power consumption end to be equal to one third of the power generation power of the power system, as shown in formula (2).

[0113] In some embodiments of the present disclosure, when the three phases on the AC side are balanced, the power of each phase should satisfy formula (2) or formula (3).

[0114] In some embodiments of the present disclosure, the three-phase power control method for the load of the photovoltaic power storage system may include: after step 49, if this balance is achieved (formula (2) or formula (3)), it ends; otherwise, the energy router continues to detect and schedule until the balance is achieved.

[0115] In some embodiments of the present disclosure, under the condition of formula (1), when the three-phase power is unbalanced, the following eight situations may occur:

[0116] ①

[0117] ②

[0118] ③

[0119] ④

[0120] ⑤

[0121] ⑥

[0122] ⑦

[0123] ⑧

[0124] For situation ①, if you want to achieve three-phase balance, you need to increase the power of phases A, B, and C. For situation ②, increase the power of phases A and B and reduce the power of phase C. The same applies to situations ③ to ⑧.

[0125] The following is an explanation of the three-phase power control method of the photovoltaic power storage system load disclosed in the present invention through a specific embodiment.

[0126] In some embodiments of the present disclosure, if the final power generation of the power system is 120 kW, the power consumption of each phase load is as shown in Table 1 below.

[0127] Table 1

[0128] Phase sequence Load power / kW Phase A 40 Phase B 30 Phase C 5

[0129] The power consumption of the air conditioner load in phase A is too large, and the power load of each phase is uneven, resulting in serious imbalance of the three phases. A ≠P B ≠P C , P A +P B +P C <P x , after being dispatched by the energy router, The dynamic balance of three-phase load power is completed.

[0130] In some other embodiments of the present disclosure, if the final power generation of the power system is 72 kW, then P A ≠P B ≠P C , P A +P B +P C >P x , the energy router acts to limit the power consumption of each phase of the air conditioner to The present invention can limit the power output of phases A and B through an energy routing device, so that the power of phases A and B decreases from 40kW and 30kW to 24kW, and at the same time compensates the power of phase C, so that it increases from 5kW to 24kW, and finally achieves three-phase power balance.

[0131] The three-phase power control method for the photovoltaic storage power system load provided by the above embodiment of the present disclosure is an energy router control method for the photovoltaic storage air conditioning system. The above embodiment of the present disclosure can maintain the power distribution balance between the single phases on the AC power side through the monitoring, scheduling, protection and control of the energy router, and then dynamically balance the power between the power grid, photovoltaic, energy storage, and air conditioning to achieve safe and stable operation of the entire power system.

[0132] The above-mentioned embodiment of the present disclosure can monitor the voltage, current and other conditions between phases in real time and maintain the power balance between phases by adding an energy routing device to the front end of the air conditioner electricity consumption.

[0133] The above-mentioned embodiments of the present disclosure are easy to implement and flexible in scheduling on the three-phase power consumption side.

[0134] Figure 5 Schematic diagram of some embodiments of the three-phase power control device for the photovoltaic power storage system load disclosed in the present invention. Figure 5 As shown, the three-phase power control device for the photovoltaic power storage system load disclosed in the present invention may include a power acquisition module 51, a power generation power determination module 52 and a power scheduling module 53, wherein:

[0135] The power acquisition module 51 is used to obtain the power drawn from and fed into the power grid, the energy storage charging and discharging power, and the photovoltaic power generation power.

[0136] In some embodiments of the present disclosure, the power acquisition module 51 can be used to obtain grid power and feed power, energy storage charging and discharging power, and photovoltaic power generation power through energy routers arranged on the grid side, energy storage device side, and photovoltaic device side of the photovoltaic power storage system.

[0137] The power generation determination module 52 is used to determine the power generation power of the power system according to the power grid power intake and feed power, energy storage charging and discharging power, and photovoltaic power generation power.

[0138] The power dispatching module 53 is used to evenly distribute the power generated by the power system to the load power consumption of each phase to achieve three-phase dynamic balance.

[0139] In some embodiments of the present disclosure, the power scheduling module 53 can be used to obtain the power consumption of each phase load at the AC power end through an energy router set at each phase load at the AC power end of the photovoltaic power storage system; through an energy router set at each phase load at the AC power end of the photovoltaic power storage system, the power consumption of each phase load at the AC power end can be scheduled according to the power generation power of the power system.

[0140] In some embodiments of the present disclosure, the power scheduling module 53 can be used to schedule the power consumption of each phase load at the AC power end to be equal, and to schedule the power consumption of each phase load at the AC power end to be equal to one third of the power generation power of the power system.

[0141] In some embodiments of the present disclosure, the power scheduling module 53 can be used to compare the power consumption of each phase load at the AC power end with the power generation power of the power system; if the power consumption of the load is greater than one-third of the power generation power of the power system, the power consumption of the load is reduced by setting an energy router at the load, so that the power consumption of the load is equal to one-third of the power generation power of the power system; if the power consumption of the load is less than one-third of the power generation power of the power system, the power consumption of the load is increased by setting an energy router at the load, so that the power consumption of the load is equal to one-third of the power generation power of the power system.

[0142] In some embodiments of the present disclosure, the three-phase power control device for the load of the photovoltaic power storage system is used to implement any of the above embodiments (for example Figure 3 or Figure 4 Operation of the three-phase power control method for the photovoltaic power storage system load as described in Example).

[0143] The energy routing device of the above-mentioned embodiment of the present disclosure mainly plays the role of monitoring and dispatching energy at the AC power consumption end, and can monitor the power changes in real time to ensure the dynamic balance of power among the three phases.

[0144] For an AC power grid, the above-mentioned embodiments of the present disclosure can reduce the loss of a power grid transformer and prevent malfunction of power grid protection elements.

[0145] For the electricity user, the above-mentioned embodiments of the present disclosure can solve the technical problem of poor electricity quality caused by uneven distribution of electricity load, and can also greatly reduce line losses and maintenance risks.

[0146] For the entire power system, the above-mentioned embodiments of the present disclosure, through autonomous control of the energy router, can completely solve the technical problem of unbalanced three-phase load caused by uneven distribution of air-conditioning load, thereby greatly improving system stability and eliminating safety hazards.

[0147] Figure 6 Schematic diagram of the structure of some other embodiments of the three-phase power control device for the load of the photovoltaic power storage system disclosed in the present invention. Figure 6 As shown, the three-phase power control device for the photovoltaic power storage system load includes a memory 61 and a processor 62.

[0148] The memory 61 is used to store instructions. The processor 62 is coupled to the memory 61. The processor 62 is configured to execute the above-mentioned embodiments (for example, Figure 3 or Figure 4 Embodiment) involves the method.

[0149] like Figure 6 As shown, the three-phase power control device for the load of the photovoltaic power storage system also includes a communication interface 63 for information exchange with other devices. At the same time, the three-phase power control device for the load of the photovoltaic power storage system also includes a bus 64, and the processor 62, the communication interface 63, and the memory 61 communicate with each other through the bus 64.

[0150] The memory 61 may include a high-speed RAM memory, and may also include a non-volatile memory, such as at least one disk memory. The memory 61 may also be a memory array. The memory 61 may also be divided into blocks, and the blocks may be combined into virtual volumes according to certain rules.

[0151] In addition, the processor 62 may be a central processing unit (CPU), or may be an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present disclosure.

[0152] The three-phase power control device for the photovoltaic power storage and utilization system load can be implemented as a computer device.

[0153] In the above-mentioned embodiment of the present disclosure, when the uneven distribution of air-conditioning load electricity leads to three-phase imbalance on the electricity consumption side, the energy routing device responds and adjusts immediately to ensure the safe and reliable operation of the power system.

[0154] The above-mentioned embodiments of the present disclosure can reduce line loss of the system, lower maintenance risks and potential safety hazards.

[0155] The above-mentioned embodiments of the present disclosure eliminate the need for load compensation devices, reduce the cost of the power system, and facilitate maintenance.

[0156] The above-mentioned embodiments of the present disclosure conform to the "dual carbon" development and build a new type of safe, stable and reliable power network.

[0157] The above-mentioned embodiment of the present disclosure can monitor the voltage, current and other conditions between phases in real time and maintain the power balance between phases by adding an energy routing device to the front end of the air conditioner electricity consumption.

[0158] The above-mentioned embodiments of the present disclosure are easy to implement and flexible in scheduling on the three-phase power consumption side.

[0159] According to another aspect of the present disclosure, a non-transitory computer-readable storage medium is provided, wherein the non-transitory computer-readable storage medium stores computer instructions, and when the instructions are executed by a processor, any of the above embodiments (for example Figure 3 or Figure 4 The three-phase power control method of the photovoltaic power storage system load described in Example 1.

[0160] The above-mentioned embodiments of the present disclosure can maintain balanced power distribution between single phases on the AC power consumption side through monitoring, scheduling, protection and control of the energy router, and further dynamically balance power between the power grid, photovoltaics, energy storage, and air conditioning to achieve safe and stable operation of the entire power system.

[0161] Those skilled in the art will appreciate that the embodiments of the present disclosure may be provided as methods, devices, or computer program products. Therefore, the present disclosure may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present disclosure may take the form of a computer program product implemented on one or more computer-usable non-transient storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0162] The present disclosure is described with reference to flowcharts and / or block diagrams of methods, devices (systems) and computer program products according to embodiments of the present disclosure. It should be understood that each process and / or block in the flowchart and / or block diagram and the combination of processes and / or blocks in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0163] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0164] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0165] The three-phase power control device for the load of the photovoltaic power storage system described above can be implemented as a general-purpose processor, a programmable logic controller (PLC), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component or any appropriate combination thereof for performing the functions described in this application.

[0166] So far, the present disclosure has been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0167] A person skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware, or may be accomplished by instructing the relevant hardware through a program, and the program may be stored in a non-transitory computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc.

[0168] The description of the present disclosure is given for the purpose of illustration and description, and is not intended to be exhaustive or to limit the present disclosure to the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present disclosure, and to enable those of ordinary skill in the art to understand the present disclosure and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A three-phase power control method for a photovoltaic power storage system load, characterized in that: include: Obtain the power drawn from and fed into the power grid, the energy storage charging and discharging power, and the photovoltaic power generation power; Determine the power generation power of the power system based on the power grid power intake and feed-in power, energy storage charging and discharging power, and photovoltaic power generation power; Evenly distribute the power generated by the power system to the load power consumption of each phase to achieve three-phase dynamic balance; The method of evenly distributing the power generated by the power system to the load power consumption of each phase to achieve three-phase dynamic balance includes: The power consumption of each phase load at the AC power consumption end is obtained by setting up an energy router at each phase load at the AC power consumption end of the photovoltaic power storage system; When the sum of the power consumption of each phase load at the AC power consumption end is greater than the power generation power of the power system, the load power is limited through the energy router, and then the power consumption of each phase load at the AC power consumption end is scheduled to be equal to one third of the power generation power of the power system; When the sum of the power consumption of each phase load at the AC power end is less than the power generation power of the power system, the power consumption of each phase load at the AC power end is scheduled to be equal through the energy router, and then the power consumption of each phase load at the AC power end is scheduled to be equal to one third of the power generation power of the power system; The step of scheduling the power consumption of each phase load of the AC power consumption end to be equal to one third of the power generation power of the power system includes: For each phase load at the AC power consumption end, comparing the power consumption of the load with the power generation power of the power system; If the power consumption of the load is greater than one third of the power generation of the power system, the power consumption of the load is reduced by setting an energy router at the load so that the power consumption of the load is equal to one third of the power generation of the power system; If the power consumption of the load is less than one third of the power generated by the power system, the power consumption of the load is increased by setting an energy router at the load so that the power consumption of the load is equal to one third of the power generated by the power system.

2. The three-phase power control method for a photovoltaic power storage system load according to claim 1 is characterized in that: The acquisition of grid power and feed power, energy storage charging and discharging power, and photovoltaic power generation power includes: By setting up energy routers on the grid side, energy storage device side and photovoltaic device side of the photovoltaic power storage system, the power drawn from the grid and fed back power, the energy storage charging and discharging power, and the photovoltaic power generation power can be obtained.

3. A three-phase power control device for a photovoltaic power storage system load, characterized in that: include: Power acquisition module, used to obtain power from the power grid and feed power, energy storage charging and discharging power, and photovoltaic power generation power; The power generation determination module is used to determine the power generation power of the power system based on the power grid power intake and feed power, energy storage charging and discharging power, and photovoltaic power generation power; The power dispatching module is used to evenly distribute the power generated by the power system to the load power consumption of each phase to achieve three-phase dynamic balance; Among them, the power scheduling module is used to obtain the power consumption of each phase load of the AC power end through the energy router set at each phase load of the AC power end of the photovoltaic storage power system; determine whether the sum of the power consumption of each phase load of the AC power end is greater than the power generation power of the power system; when the sum of the power consumption of each phase load of the AC power end is greater than the power generation power of the power system, limit the load power through the energy router, and then schedule the power consumption of each phase load of the AC power end to be equal to one third of the power generation power of the power system; when the sum of the power consumption of each phase load of the AC power end is less than the power generation power of the power system, schedule the power consumption of each phase load of the AC power end to be equal through the energy router, and then schedule the power consumption of each phase load of the AC power end to be equal to one third of the power generation power of the power system; Among them, the power scheduling module is used to compare the power consumption of each phase load at the AC power end with the power generation power of the power system for each phase load at the AC power end when the power consumption of the load is scheduled to be equal to one-third of the power generation power of the power system; if the power consumption of the load is greater than one-third of the power generation power of the power system, the power consumption of the load is reduced by setting an energy router at the load so that the power consumption of the load is equal to one-third of the power generation power of the power system; if the power consumption of the load is less than one-third of the power generation power of the power system, the power consumption of the load is increased by setting an energy router at the load so that the power consumption of the load is equal to one-third of the power generation power of the power system.

4. The three-phase power control device for a photovoltaic power storage system load according to claim 3 is characterized in that: The three-phase power control device for the load of the photovoltaic power storage and utilization system is used to execute the operation of the three-phase power control method for the load of the photovoltaic power storage and utilization system as described in claim 2.

5. A three-phase power control device for a photovoltaic power storage system load, characterized in that: include: A memory for storing instructions; The processor is used to execute the instruction so that the three-phase power control device of the photovoltaic power storage system load performs the operation of implementing the three-phase power control method of the photovoltaic power storage system load as described in claim 1 or 2.

6. A three-phase power control device for a photovoltaic power storage system load, characterized in that: It includes an energy router set on the grid side, the energy storage device side, the photovoltaic device side and each phase load of the AC power consumption end, and a three-phase power control device for the photovoltaic storage power consumption system load as described in any one of claims 3-5.

7. A photovoltaic power storage system, characterized in that: It includes the three-phase power control device for the photovoltaic power storage system load as described in claim 6.

8. The photovoltaic power storage and utilization system according to claim 7, characterized in that: The photovoltaic power storage system is a photovoltaic air conditioning system.

9. A non-transitory computer-readable storage medium, characterized in that: The non-transitory computer-readable storage medium stores computer instructions, and when the instructions are executed by the processor, the three-phase power control method for the load of the photovoltaic power storage and utilization system as described in claim 1 or 2 is implemented.

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