CN116014802A - Dynamic current limiting control system and control method for safely adding power equipment - Google Patents
Dynamic current limiting control system and control method for safely adding power equipment Download PDFInfo
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Abstract
The invention discloses a dynamic current limiting control system and a control method for safely adding power equipment in the technical field of power control, wherein the control system comprises a power grid active power acquisition end for acquiring power information, a current limiting central control end for acquiring real-time power supply power allowance in a power utilization area according to the power information and generating a real-time power utilization control instruction, and a dynamic current limiting control end for controlling the power control of additional power equipment by controlling the input power of the power equipment added on the power line according to the power utilization control instruction. The invention not only can meet the power supply requirement of the additional power equipment and realize real-time and accurate control, but also can avoid network modification of the original load circuit in the power utilization area, reduce the cost and increase the efficiency, simultaneously reduce the energy consumption of the whole power circuit and ensure the power utilization safety.
Description
Technical Field
The invention relates to the technical field of power control, in particular to a dynamic current limiting control system and a control method for safely adding power equipment.
Background
With the increase of the pure electric vehicles, the charging of the pure electric vehicles is becoming an increasingly important problem for vehicle owners. The charging mode of the pure electric vehicle on the market at present mainly comprises charging to a parking lot or a station type charging station with a charging pile. Although the electric energy can be charged in the places with high probability, the parking lots are limited to be in remote positions generally, so that the parking lots are inconvenient to move, and the situation that the electric energy is not charged or occupied by the full piles is always caused in a slightly central position. Therefore, the trouble and difficulty in charging the pure electric vehicle become the pain points for using the pure electric vehicle, and the popularization of the pure electric vehicle is also affected.
The energy is also supplied, but the maximum difference between a pure electric vehicle and a fuel vehicle is the distribution of energy sources. The fuel oil is a controlled inflammable and explosive chemical energy source, belongs to dangerous articles, is only replenished at a filling station far away from the residential building, the office, the production and other places, and therefore, the filling can only be carried out to the filling station. But the electric energy exists in almost all places where people live and work and are produced. If the battery electric vehicle can be charged in a district, an office or a production place, the battery electric vehicle is the most convenient charging mode, namely, the battery electric vehicle can be charged by the way without the vehicle at home or during work.
However, an effective method and technical guarantee for directly constructing a charging station in the original power environment under the condition of not modifying a power grid (such as transformer capacity increase, power line thickening and the like) are lacking at present. Under the condition, if the charging pile is directly installed, the power load during charging is easy to exceed the original rated load, tripping, short circuit of a transformer and a circuit, indirect damage of a server, a computer, electric equipment and electric appliances and the like are easy to cause, so that serious power accidents are caused, the life and production power consumption of residents are influenced, and serious economic loss and serious social and negative effects are caused. If charging is to be performed in a community, an office or a production place, the current mode is to perform capacity expansion or additional application of a power supply line to an original power grid, apply for and purchase a transformer, and the like. However, the mode is limited by the original power grid capacity of the area, the adjustment and transformation of the power grid capacity of the whole area can be influenced, the cost is huge, and the batch obtaining is not easy. Therefore, in the current situation, it is difficult to add charging equipment in the places such as communities, offices, production and the like.
In summary, how to solve the problem of difficult access of the charging pile under the condition of ensuring the safety of the power grid under the condition of current power resources, and to realize the maximized laying of the charging pile, especially to increase the construction of the sharing charging pile of a district, a park, an office building and the like, and solve the problem of difficult charging pain of the pure electric vehicle, which is a research focus in the industry and is also one of targets of the whole new energy application industry.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a dynamic current limiting control system and a control method for safely adding power equipment.
The technical scheme of the invention is as follows:
in one aspect, a dynamic current limiting control system for a safety add-on power device includes
The active power acquisition end of the power grid is used for acquiring power information by a transformer or a power dynamic ring system;
the current limiting central control end is used for receiving the power information sent by the active power acquisition end of the power grid, obtaining real-time power supply allowance in a power utilization area and generating a corresponding real-time power utilization control instruction;
and the dynamic current limiting control end is used for receiving the power utilization control instruction sent by the current limiting central control end and controlling the maximum output power to be reached by controlling the maximum output current, thereby controlling the input power of the power equipment additionally arranged on the power line.
The invention according to the scheme is characterized in that a wired and wireless communication module is arranged in the active power acquisition end of the power grid, and the power information is acquired by the power ring system in a wired or wireless communication mode.
Furthermore, the active power collection end of the power grid can obtain power information through a transformer or directly through the power ring system.
The invention according to the above scheme is characterized in that the power information includes current information, voltage information, phase angle information on the bus in the power utilization area.
The invention according to the scheme is characterized in that the current limiting central control end is internally provided with a wired and wireless communication module which is connected with the active power collection end of the power grid in a wired or wireless communication mode.
According to the scheme, the power consumption control method is characterized in that after the current limiting central control end obtains the power information forwarded by the active power acquisition end of the power grid, power conversion is carried out, and calculation is carried out by combining full-load power and power factors of the power consumption area preset, so that a power consumption control mode of the maximum power of the power line for being used by additionally arranged power equipment is obtained.
The invention according to the scheme is characterized in that the dynamic current limiting control end is internally provided with a wired and wireless communication module which communicates with the current limiting central control end in a wired or wireless communication mode and obtains a power utilization control instruction.
The invention according to the scheme is characterized in that the output end of the dynamic current limiting control end is connected with an energy storage system, the energy storage system is internally provided with an electric energy management system, and the electric energy management system is used for realizing emergency power reserve and peak Gu Pingdian force scheduling to assist in supplying power to the additionally-arranged power equipment.
The invention according to the proposal is characterized in that the active power collection end of the power grid, the current-limiting central control end and the dynamic current-limiting control end are directly connected for use,
or the active power collection end, the current limiting central control end and the dynamic current limiting control end of the power grid are networked and connected with a local server or a cloud server, and are used for receiving configuration and management of the local server or the cloud server.
In another aspect, a dynamic current limiting control method for a safety add-on power device includes the steps of:
s1, acquiring real-time power information of a power grid in a power utilization area;
s2, acquiring a dynamic power supply real-time residual value which can be used in the power utilization area;
and S3, generating the input power of the additional power equipment on the power line according to the real-time allowance value of the power supply power, performing a dynamic control mode, and realizing the power control of the additional power equipment on the power line according to the control mode.
According to the scheme, the dynamic current limiting control system can be partially or completely embedded with additional equipment (such as a charging pile, energy storage equipment and the like) to form an integrated structure, and the dynamic current limiting control system can acquire available power supply allowance of the additional power equipment in real time through mutual matching of the three parts by connecting the active power acquisition end, the current limiting central control end and the dynamic current limiting control end of the power grid to the circuits of the power system and the additional power equipment, so that the power supply requirement of the additional power equipment (a new energy automobile charging pile and other electric equipment) can be met, real-time and accurate control can be realized, the network changing of an original load circuit in an electricity utilization area can be avoided, the cost and efficiency are reduced, the energy consumption of the whole power circuit is reduced, and the electricity utilization safety is ensured.
Drawings
FIG. 1 is a system configuration diagram of a first embodiment of the present invention;
FIG. 2 is a system configuration diagram of a second embodiment of the present invention;
FIG. 3 is a system configuration diagram of a third embodiment of the present invention;
FIG. 4 is a system configuration diagram of a fourth embodiment of the present invention;
fig. 5 is a system configuration diagram of a fifth embodiment of the present invention.
Description of the embodiments
The invention is further described below with reference to the drawings and embodiments:
as shown in fig. 1 to 5, in order to solve the defect that extra power equipment lines are difficult to add in the existing power utilization area or the power utilization safety of the extra lines is poor, the invention provides a dynamic current limiting control system for safely adding power equipment (such as a charging pile and the like) under the current power grid, which can acquire the power information in the power utilization area in real time and accurately, realize the power utilization control of the added power equipment (such as the charging pile and the like), realize the power utilization safety of the added power equipment (such as the charging pile and the like), reduce the construction cost and the approval and the like because the power grid transformation is not needed, solve the problem that the pure electric vehicle is difficult to charge at last kilometer or even last hundred meters, and greatly facilitate the charging of the pure electric vehicle.
This a dynamic current limiting control system for safely add power equipment, including electric wire netting active power collection end, current limiting center control end, dynamic current limiting control end, be equipped with the power line who adds power equipment (like filling electric pile etc.) on original power line in the power consumption district (for example garden, district, office building etc.), and foretell electric wire netting active power collection end, current limiting center control end, dynamic current limiting control end connect in electric power system and add power equipment's circuit, be used for obtaining the electric power information on the main power line and real-time, accurate control add power equipment (like filling electric pile etc.) operation not surpass former electric wire netting rated load.
1. Active power collection terminal of power grid
The active power acquisition end (also called as an active power collector, for short APC (Active power collector)) of the power grid is used for acquiring power information by a transformer or a power ring system (such as an original power grid is configured), and transmitting the acquired power information to a current-limiting central control end for processing by a combined algorithm. The power information includes current information, voltage information and phase angle information on the bus in the power utilization area.
The active power collection end of the power grid can acquire power information through a transformer or a power dynamic ring system (such as existing configuration), and can also directly acquire power information through the power dynamic ring system (such as existing configuration). For example, when the power grid layout of the power utilization area is simpler, the active power collection end of the power grid can be arranged at the total output end of the power utilization area; if the distribution of the power grid in the power utilization area is complex, and the power utilization is unbalanced supported by each power grid, besides the total output end of the transformer in the power utilization area, a secondary or tertiary or even more power collector can be arranged at the total input end of a circuit provided with additional power equipment (such as a charging pile and the like), so that the multi-distribution power supply with more redundant power and the branch lines with less redundant power are used for distributing the power supply.
The active power acquisition end of the power grid is generally internally provided with a digital-to-analog conversion module, and is internally provided with a wired communication module, a wireless communication module and a corresponding circuit, and the purpose of the digital-to-analog conversion module is to acquire power information through a transformer or a power ring system (such as existing configuration) matched with the power grid and send the power information to the current-limiting central control end.
2. Current limiting central control terminal
The current limiting central control terminal (also called as a current limiting control center (CLCC-Current limiting control center)) is used for receiving the power information sent by the active power acquisition terminal of the power grid and obtaining the real-time power supply allowance in the power utilization area to generate a corresponding real-time power utilization control instruction.
And after the current limiting central control end and the power information forwarded by the active power acquisition end of the power grid are obtained, power conversion is carried out, the power conversion is compared with full-load power preset in the power utilization area, logic processing is carried out through an algorithm, and a power utilization control mode of additional power equipment (such as a charging pile and the like) on the power line is obtained.
In the power scaling process, s=q, where S is apparent power, P is active power, Q is reactive power, and active power=apparent power×power factor.
3. Dynamic current limiting control terminal
The dynamic current limiting control end (also called as dynamic current limiting controller (DCLC-Dynamic current limiting controller)) is output power control equipment of the control system and is used for receiving a power utilization control instruction sent by the current limiting central control end and controlling input power of additional power equipment (such as a charging pile and the like) on a power line. Specifically, after the dynamic current limiting control end receives the control signal of the current limiting central control end, the output current is controlled in real time, namely the output maximum power is controlled, so that the total power of the power grid does not exceed the original rated power grid load even if additional power equipment (such as a charging pile and the like) is additionally arranged in the control.
The dynamic current limiting control end comprises a single phase type and a three phase type, and supplies power to the added power equipment through the dynamic current limiting control end, namely, the input end of the added power equipment is connected with the output end of the dynamic current limiting control end, and the control of the added power terminals with various specifications and quantity is realized by matching with different control powers. Specifically, the single-phase dynamic current limiting control end is mainly used for a single-phase power circuit, the input end and the output end of the single-phase dynamic current limiting control end are both the same-phase power circuit, and the single-phase dynamic current limiting control end can be used for independently guaranteeing that the total power of a circuit is not overloaded after equipment (the equipment is used for single-phase power supply) is additionally arranged on the phase circuit. The input end of the three-phase dynamic current-limiting control end is three-phase electricity, the output is three-phase electricity, and the three-phase dynamic current-limiting control end can be directly connected with added three-phase power equipment for three-phase balanced power supply; the power distribution router can automatically distribute each phase according to the three-phase active power condition of a bus, the power which can be output by a phase circuit with small active power is high, and the power which can be output by a phase circuit with large active power in the three phases is low, so that the power can be supplied to the added power equipment (such as a charging pile and the like) under the condition of not overload, and the effect of balancing the three-phase power of a power grid is also achieved.
In a low-voltage distribution system, loads are distributed on three phases as evenly as possible, namely, three-phase loads are kept basically balanced, and the three-phase loads are balanced, so that the output of a transformer can be improved, the transformer can be operated economically and safely, the line loss can be reduced, the neutral line can be protected, the three-phase voltages can be balanced, and the safe operation of electric equipment is facilitated. When the three-phase load is unbalanced, the output power of the transformer is reduced, and the generated zero sequence potential can cause the reduction of one-phase voltage with large load and even be smaller than rated voltage, so that the single-phase equipment of the phase cannot normally operate (stop or abnormal heating); when a certain phase is lightly loaded, the voltage of the phase end rises, when the rated voltage Xu Duoshi is exceeded, the safety of the single-phase equipment is threatened, and when the rated voltage Xu Duoshi is severe, the single-phase equipment is burnt out. Meanwhile, the unbalance of the three-phase load also easily causes the overlarge and blowing-out of neutral line current, so that more serious electric accidents are derived. Therefore, the introduction of the dynamic current limiting control system is not only beneficial to exerting the power resources of the original power grid for additionally arranging power equipment (such as a charging pile and the like), solving the pain point of difficult charging of the pure electric vehicle, popularizing the power-assisted pure electric vehicle, but also better protecting the safe operation of the power grid.
In the specific implementation process, the output end of the dynamic current limiting control end can be connected with an energy storage system, an electric energy management system is arranged in the energy storage system, and the electric energy management system is used for realizing emergency power reserve and peak Gu Pingdian force scheduling to be additionally provided with power equipment (such as a charging pile and the like) for auxiliary power supply.
In the control system, a wired and wireless communication module is arranged in an active power acquisition end of a power grid, and the wired and wireless communication module acquires power information from a power ring system (such as existing configuration) of the power grid through a mutual inductor or a wired and wireless communication mode. The current limiting central control end is internally provided with a wired and wireless communication module which is connected with the active power collection end of the power grid in a wired or wireless communication mode. The dynamic current limiting control end is internally provided with a wired and wireless communication module which is communicated with the current limiting central control end in a wired or wireless communication mode and obtains a power utilization control instruction.
The data transmission can be realized through a wired or wireless mode among the active power acquisition end, the current-limiting central control end and the dynamic current-limiting control end of the power grid, so that the area size of the power utilization area is not affected among the active power acquisition end, the current-limiting central control end and the dynamic current-limiting control end of the power grid, and the stability of signal transmission is ensured. Specifically, the above-mentioned wired modes include, but are not limited to, a network port, a power carrier, RS485, a CAN line, etc.; wireless means include, but are not limited to, loRa, NB-IoT, zigBee, GPRS, 4G, 5G, etc.
The three parts of the active power acquisition end, the current-limiting central control end and the dynamic current-limiting control end of the power grid can be partially or completely directly connected and associated to work, and the local management server can be arranged when the active power acquisition end, the current-limiting central control end, the dynamic current-limiting control end and the additional equipment of the power grid are more and networking coordination and remote configuration are needed to improve the system debugging efficiency. The dynamic current limiting control system is networked with the server and is used for receiving the configuration and management of the local server; the active power collection end, the current limiting central control end and the dynamic current limiting control end of the power grid can be connected with the cloud server and are used for receiving unified configuration, coordination and management of the cloud server, so that application management in a larger range is realized.
In the invention, the active power acquisition end, the current limiting central control end and the dynamic current limiting control end of the power grid can be integrated into a whole to form complete power control equipment, thereby completing regulation and control; the system can be separately deployed and constructed as independent power control equipment to achieve the purpose of regulation and control, and the data transmission and the power regulation and control between the functional ends are achieved in a wired or wireless mode.
In the embodiment shown in fig. 1, an active power collection end (APC), a current limiting central control end (CLCC) and a dynamic current limiting control end (DCLC) of the power grid are integrated into a whole to form an integrated device, and the three devices can be connected in the integrated device by a wire or by a wireless connection. The integrated equipment is connected to a main power line of the power system and is connected with additional power equipment (charging piles and other electric equipment) for realizing control of the additional power equipment; the main power line in the power utilization area is also connected with other loads in the area, so that the power supply and control functions of the loads are realized.
In the embodiment shown in fig. 2, the current limiting central control terminal (CLCC) and the dynamic current limiting control terminal (DCLC) are integrated into an integrated device, and the two integrated devices can be connected by wire or wirelessly. The integrated equipment and the power grid active power collection end (APC) are respectively connected to a main power line of the power system, and the power grid active power collection end (APC) and the integrated equipment can be connected in a wired or wireless mode. The integrated equipment is also connected with additional power equipment (charging piles and other electric equipment) and is used for realizing control of the additional power equipment; the main power line in the power utilization area is also connected with other loads in the area, so that the power supply and control functions of the loads are realized.
In the embodiment shown in fig. 3, the active power collection end (APC) and the current limiting central control end (CLCC) of the power grid are integrated into a whole to form an integrated device, and the two integrated devices can be connected by wire or wirelessly. The integrated equipment and the dynamic current limiting control end (DCLC) are respectively connected to a main power line of the power system, and the dynamic current limiting control end (DCLC) and the integrated equipment can be connected in a wired or wireless mode. The dynamic current limiting control end (DCLC) is also connected with the additional power equipment (the charging pile and other electric equipment) and is used for realizing the control of the additional power equipment; the main power line in the power utilization area is also connected with other original loads in the area, so that the original loads are not influenced by the operation of the additionally arranged power equipment (such as a charging pile and the like).
In the embodiment shown in fig. 4, the active power collection end (APC), the current-limiting central control end (CLCC) and the dynamic current-limiting control end (DCLC) of the power grid are separately deployed to form a system and complete regulation, and wired connection or wireless connection can be performed between the current-limiting central control end (CLCC) and the active power collection end (APC) of the power grid and between the current-limiting central control end (CLCC) and the dynamic current-limiting control end (DCLC). The active power acquisition end (APC) and the multipath dynamic current limiting control end (DCLC) of the power grid are respectively connected to a main power line of the power system, and each path of dynamic current limiting control end (DCLC) is connected with corresponding additional power equipment (charging piles and other electric equipment) for realizing the control of the additional power equipment; the main power line in the power utilization area is also connected with other original loads in the area, so that the original loads are not influenced by the operation of the additionally arranged power equipment (such as a charging pile and the like).
Unlike the embodiment shown in fig. 4, in the embodiment shown in fig. 5, the dynamic current limiting control terminal (DCLC) may also interface with and form an integral body with the energy storage system (ESS-Energy Storage System), and implement emergency power reserve and peak Gu Pingdian force scheduling by the power management system (EMS), to provide auxiliary power supply for additional power equipment, balance the grid, and reduce electricity rate costs. Compared with the prior art that the capacity expansion is needed when the power grid is connected with the energy storage system, the energy storage system can be directly used without carrying out capacity expansion transformation on the original power grid, and the energy storage system can be flexibly connected.
The energy storage system is used in places where power is still required to be provided for the additional equipment in peak power consumption time of the power grid and in areas with large price difference of the peak Gu Pingdian. The energy storage system is charged in a period with low electricity consumption peak and low electricity charge, and the electric energy stored in the energy storage system is output when the electricity consumption peak and the electricity price peak are high, so that power is supplied to the additionally-arranged power equipment (such as a charging pile and the like), and the power supply to the additionally-arranged power equipment (such as the charging pile and the like) is realized even in the case of the electricity consumption peak and the security of a power grid is ensured. For example, most people go to work in the night and daytime of a cell, the cell belongs to electricity consumption low-valley, and idle power of a cell power grid can be used for supplying power to the additionally arranged power equipment.
The invention is suitable for single-phase and three-phase equipment which is powered by idle power and does not need to be completely powered according to rated power, and the quantity of the added equipment is limited, so that the idle power is fully utilized as a principle, and the quantity can be matched according to the numerical value and time of the idle power obtained by the invention in practical application.
In the above embodiment, the dynamic current-limiting output end is connected with the charging pile or other electric equipment, and can also be directly integrated with the charging pile and the required power equipment, so as to realize various installation control modes.
The invention also provides a dynamic current limiting control method for the safety additionally-arranged power equipment, which is based on the dynamic current limiting control system for the safety additionally-arranged power equipment, and specifically comprises the following steps:
s1, acquiring power information of a power ring system (such as existing configuration) in a power utilization area.
The power grid active power acquisition end acquires different-phase real-time current information of the power grid through a mutual inductor, a wired and wireless mode, a power grid power ring system (such as existing configuration) and the like, performs digital-to-analog conversion, transmits the information to the current limiting central control end through the communication module, converts the information into real-time active power of the power grid through parameters such as preset power factor and the like of the current limiting central control end, obtains the maximum power of a power line for additionally arranging power equipment through combining an algorithm, generates a corresponding control signal, and is used for controlling the power utilization control mode of the output current of the lower equipment-dynamic current limiting control end.
The active power collection end of the power grid can collect real-time current information of different phases of the power grid in two ways: the current-voltage analog signals are collected through a transformer and are converted into digital signals and then sent to a current-limiting central control end through a communication module; another type of power grid for installing the power ring system (all power information is collected in the system and is convenient to be transmitted to a power supply company for settlement and background monitoring), if the power ring system is installed, current, voltage and phase angle information can be directly obtained from the power ring system through coordination with the power supply company, and the current, voltage and phase angle information can be sent to a current limiting central control end through the collector.
In the conversion process, the voltage of the current position is constant no matter the high-voltage end, the low-voltage end and the power distribution cabinet end of the transformer, so that the actual real-time active power (p=ui) of the power grid can be obtained by multiplying the current of the power grid by the voltage of the corresponding position.
S2, obtaining dynamically-changed power supply allowance which can be used in the power utilization area.
The current limiting central control end obtains active power, calculates apparent power by combining a power factor, and then subtracts the apparent power from rated load capacity of the power grid to obtain dynamically-changed power supply allowance (active power=apparent power×power factor) which can be used by the power grid actually.
Because the active power collection end of the power grid can collect power data in real time and convert the power data into current apparent power (namely current load), the current limiting central control end combines the pre-input rated load (rated power) of the power grid, calculates the power which can be provided according to the current apparent power, generates a control instruction to the current limiting control end, and adjusts the output maximum power in real time after the current limiting control end receives the instruction.
S3, the current limiting central control end generates a control instruction according to the power supply allowance and sends the control instruction to the dynamic current limiting control end on the power line, and the dynamic current limiting control end limits the maximum value of output current according to the control instruction, so that the input power of the additionally arranged electric equipment is smaller than the available power supply allowance.
For a single-phase power grid, current information of a single-phase line is directly acquired and converted into active power. Aiming at a three-phase power grid (the phase difference of three-phase voltage is 120 degrees), three-phase additional power equipment (such as a three-phase charging pile and the like) can be directly connected into a three-phase dynamic current limiting control end, three-phase currents can be respectively collected, active power of different-phase currents is obtained, surplus power is redistributed, the requirements of the single-phase charging pile and the like of a pure electric vehicle are met, the balance of the three-phase power of the power grid is facilitated, and the safety of the power grid is better ensured.
Because the added power equipment is connected into the power grid through the current-limiting controller, and the voltage is basically constant, the dynamic current-limiting control end can control the power output by the current-limiting controller only by controlling the current, and all the added equipment is used in the power range, so that the overload condition of the power grid caused by simultaneous use can not occur. Through the mode, the invention can not only solve the safety power supply requirement of the power equipment (such as single-phase/three-phase charging piles and the like) additionally arranged under the condition of not reforming and expanding the power grid in a large number of communities, parks, office buildings, hotels and other places, but also balance the three-phase load of the power grid. The situations of increased line power loss, increased transformer power loss, accelerated line heating and aging, reduced output of a distribution transformer, zero sequence current generated by the distribution transformer, influence on the safety of electric equipment and the like caused by three-phase unbalance are effectively avoided while the cost and the efficiency are reduced, better balance and guarantee the safety of the power grid.
It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.
While the invention has been described above with reference to the accompanying drawings, it will be apparent that the implementation of the invention is not limited by the above manner, and it is within the scope of the invention to apply the inventive concept and technical solution to other situations as long as various improvements made by the inventive concept and technical solution are adopted, or without any improvement.
Claims (10)
1. A dynamic current limiting control system for safely adding power equipment is characterized by comprising
The active power acquisition end of the power grid is used for acquiring power information by a transformer or a power dynamic ring system;
the current limiting central control end is used for receiving the power information sent by the active power acquisition end of the power grid, obtaining real-time power supply allowance in a power utilization area and generating a corresponding real-time power utilization control instruction;
and the dynamic current limiting control end is used for receiving the power utilization control instruction sent by the current limiting central control end and controlling the maximum output power to be reached by controlling the maximum output current, thereby controlling the input power of the power equipment additionally arranged on the power line.
2. The dynamic current limiting control system for safely adding power equipment according to claim 1, wherein a wired and wireless communication module is arranged in the active power collection end of the power grid, and the power information is obtained by the power ring system in a wired or wireless communication mode.
3. The dynamic current limiting control system for a safety add-on power device of claim 2, wherein the grid active power collection terminal obtains power information through a transformer or directly from the power ring system.
4. The dynamic current limit control system for a safety add-on power device of claim 1, wherein the power information includes current information, voltage information, phase angle information on a bus within the power usage area.
5. The dynamic current limiting control system for safely adding power equipment according to claim 1, wherein a wired and wireless communication module is arranged in the current limiting central control end and is connected with the active power collection end of the power grid in a wired or wireless communication mode.
6. The dynamic current limiting control system for safety add-on power equipment according to claim 1, wherein the current limiting central control terminal performs power conversion after obtaining the power information forwarded by the active power collection terminal of the power grid, and performs calculation by combining with the preset full load power and power factor of the power utilization area to obtain the power utilization control mode of the maximum power of the power line for use by the additional add-on power equipment.
7. The dynamic current limiting control system for safety add-on of electric power equipment according to claim 1, wherein a wired and wireless communication module is arranged in the dynamic current limiting control terminal, which communicates with the current limiting central control terminal in a wired or wireless communication manner and obtains a power consumption control instruction.
8. The dynamic current limiting control system for a safety add-on power device of claim 1, wherein an output end of the dynamic current limiting control end is connected with an energy storage system, the energy storage system is internally provided with an electric energy management system, and the electric energy management system is used for realizing emergency power reserve and peak Gu Pingdian force scheduling to assist in supplying power to the add-on power device.
9. The dynamic current limiting control system for a safety add-on power device of claim 1, wherein the active power collection end, the current limiting central control end and the dynamic current limiting control end are directly connected for use,
or the active power collection end, the current limiting central control end and the dynamic current limiting control end of the power grid are networked and connected with a local server or a cloud server, and are used for receiving configuration and management of the local server or the cloud server.
10. The dynamic current limiting control method for safely adding the power equipment is characterized by comprising the following steps of:
s1, acquiring real-time power information of a power grid in a power utilization area;
s2, acquiring a dynamic power supply real-time residual value which can be used in the power utilization area;
and S3, generating the input power of the additional power equipment on the power line according to the real-time allowance value of the power supply power, performing a dynamic control mode, and realizing the power control of the additional power equipment on the power line according to the control mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310101851.4A CN116014802A (en) | 2023-02-13 | 2023-02-13 | Dynamic current limiting control system and control method for safely adding power equipment |
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