CZ308496B6 - Control system of an AC charging station or group of charging stations for local distribution networks with limited reserve capacity and method of control using this system - Google Patents

Abstract

The AC charging station control system comprises phases (1) of the power supply, fuses (2) of the hybrid line, a central block (3a) measurement of global consumption and quality of electricity in the end line of the power network, a shared communication medium (7) and at least one end charging point (6) with a user identification device (9) and at least one connection point (8). Fuse elements (2) of the hybrid line, the central block (3a) for measuring global consumption and electricity quality and at least one end charging point (6) are supplied from the power supply phases (1). The system has a central control element (4a) for controlling at least one end charging point (6) and for monitoring the global load of the phases (1) of the power supply. It also has at least one local control element (4b) in the end charging point (6) for monitoring the local load of the power supply phases (1) in the individual end charging points (6). The central control element (4a) is connected to each local control element (4b) via a shared communication medium (7), and is also connected to the line protection elements (2) with the central measurement block (3a). The invention also relates to a method for controlling the above system.

Description

Control system of an AC charging station or group of charging stations for local distribution networks with limited reserved capacity and control method using this system

Field of technology

The invention relates to a control system for AC charging stations or a group of charging stations for local distribution networks with a limited reserved capacity for charging battery-powered mobile devices such as electric cars, electric bicycles, electric wheelchairs, etc., which enable, after connection to the 230/400 V AC power network its own recharge without a data communication interface between these charging devices and the charging station.

Current state of the art

Known charging devices including charging stations for electric cars, electric bicycles, various small mobile minicars and mobile electric devices, but especially for electric cars, need fast charging of these appliances with high current, typically 32-64A, or the charging devices may include DC charging support. Therefore, classic sockets and connections typically protected by 16A/230 V or 16A/400 V are used. However, many appliances that use three-phase charging are not able to use all three phases. For this reason, charging only takes place on two of the three phases that are available, in the case of an AC charging station it can be one, however unused phases remain.

Recently, dedicated corporate charging stations have appeared, which, although they do not allow fast charging, nevertheless enable the vehicle to be charged during working hours to the level required by the worker to make the return trip, or to keep the electric car or similar vehicle in working order.

A modern trend is also the use of electrical installations, typically public lighting to charge electric cars or generally as a source of electricity. This possibility arose as a result of the modernization of public lighting networks, which caused energy savings.

The newly released potential of the public lighting transmission network can be used to power charging stations. However, these installations must take into account the limited current that the energy network is able to supply, for many different reasons, such as the need to supply current to the primary consumer, which is the public lighting itself. Due to the installation of smart technologies in these public lights, it is then possible to work dynamically with the maximum performance of the given network segment.

Japanese patent application JP 2015162959A deals with a charging station that includes a generator. In case of insufficient power of the generator, energy is drawn from the power grid. The power that the generator can deliver, as well as the power taken, is predicted. Depending on the predictions, the billing tariff is then adjusted in the event of the need to draw energy from the grid. The essence of this solution lies in predicting the energy that the generator of the charging station can supply by itself, and depending on the current status of the charging station, especially the number of vehicles and predictions, the price tariff is adjusted. The control element adjusts the tariff according to the priority of charging and the current tariffs from the electricity network.

Chinese patent application CN 107120583 A describes a method of using a street lamp for lighting, charging electric cars and wireless communication between units. It is not clear how both global and local consumption of electricity in the end segment of the network is measured and controlled in this system.

Chinese patent application CN 106931411 A describes a method of controlling a street lamp with a charging station. For this solution, it uses standard control means in the form of a microcontroller, which is connected to a battery system powered by a solar battery. Furthermore, the surrounding variables are measured (temperature,

-1 CZ 308496 B6 humidity) and everything can be displayed on the LCD display and controlled from the keyboard or capacitive touchscreen. Furthermore, a warning system is installed in the event of a measurement error. This charging station control system intervenes in the lighting control of the original street lamp concept with the possibility of measuring temperature and humidity.

Chinese patent application CN 106385083 A describes a method of controlling a street lamp with a charging station. For this solution, it uses standard control means in the form of a PLC, which is connected to a battery system powered by a solar battery. The output is in the form of direct current, which can be used, for example, to charge mobile phones. This charging station control system intervenes in the lighting control of the original street lamp concept.

Disadvantages of the current state of the art mainly consist in the fact that the charging of mobile devices itself can take place in different modes and, due to the absence of communication with mobile devices, it is necessary to switch on, off or switch the outputs of the charging station as needed and to control the flow of energy in another way. Another disadvantage is the interference with lighting control, as the primary function of public lighting, when charging from charging stations is controlled. Charging control and lighting are thus dependent on each other, which makes even the installation of charging control systems difficult.

The essence of the invention

The aim of this invention is to design a charging unit management system for charging mobile electrical devices in a centralized, decentralized or distributed distribution of charging units within the final segment of the energy network using a communication interface. Such a system will make it possible to dynamically configure the mobile electrical devices that are connected and thus use the maximum current range for a given segment of the energy network in such a way that the primary function of the energy network is not violated and at the same time that the connected mobile devices are charged, or that the user is warned in given time conditions, what level of charge it can expect, while being limited by its fuse, typically 16 or 32 A.

The above objective is achieved by means of a control system of an AC charging station or a group of charging stations for local distribution networks with limited reserved capacity, including power supply phases, line protection elements with hybrid deployment, a central unit for measuring global consumption and power quality in the end line of the power network , a shared communication medium and at least one final charging point with a user identification device and at least one connection point. A line with a hybrid setup means the connection of the system of charging points and all technologies related to the presented solution, as well as primarily the original installation of public lighting, traffic signs, traffic lights, etc., and other appliances that are connected to the phases of the electrical supply behind the safety elements. The fuse elements of the line with a hybrid configuration, the central unit for measuring the global consumption and quality of electric power and at least one final charging point are powered from the phases of the electric power supply. The essence of the invention is that the system is provided with a central control element for controlling at least one end charging point and for monitoring the global load of the phases of the electrical supply, and is further provided with at least one local control element located in the end charging point for monitoring the local load of the phases of the electrical supply in the individual end charging points, while the central control element is connected to each local control element via a shared communication medium, and it is also connected to the securing elements of the line with a hybrid arrangement and to the central block for measuring the global consumption and quality of electricity. Both the central control element and each local control element are powered from the power supply phases.

The central control element and the local control element further include a software application and control hardware consisting of a computing means that is a microcomputer or a microcontroller or a gate array system or a PLC.

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The central control element is preferably further connected to a temporary auxiliary source of electrical energy and to a communication medium for connection to superior systems. The temporary auxiliary power source is connected to the power supply phases between the protection elements of the line with hybrid installation and the central unit for measuring the global consumption and quality of electric power, and is also connected directly to the protection elements of the line with hybrid installation and to the central unit for measuring the global consumption and quality of electricity.

The phases of the electrical supply are preferably connected to at least one connection point at the final charging point via a phase selector and a local block for measuring the local consumption and quality of electrical energy in the final line of the energy network. At the same time, the local block for measuring local consumption and quality of electrical energy is connected to a local control element further connected to a phase selector, while the local control element is connected to a user identification device.

From the temporary auxiliary power source, the test phase of the power supply can be routed to the phase selector of at least one end charging point via the central unit for measuring the global consumption and quality of power. Its use is possible in the event that it is necessary to test the connected appliance in order to prevent the tripping of the safety elements, and thus the non-interruption of the simultaneously powered technology. The test phase allows the system to find out what current the appliance draws so that it can be assigned to one of the main phases by switching the phase selector. The test phase is therefore intended only to test the current consumption. In the event of excessive consumption, the device is automatically electronically disconnected by a temporary auxiliary source of electrical energy at the command of a central or local control element.

Preferably, the final charging point is installed on a public lighting pole or a pole near a parking place (e.g. installation in a parking lot, in an underground garage, in a parking garage, in a private garage in a household, etc.).

The central control element has the power to at least calculate the prediction and control applications for the end charging points, the points being a charging station or groups of charging stations forming at least one end charging point, when these end charging points are equipped with local control elements while providing the primary function of the end segment of the energy network, for example ensuring the faultless operation of public lighting.

A central control element communicating with a local control element, of an end segment of the power network, when the local control element is an input supply, for example, a switchboard terminal, is subordinated to this central control element so that the end segment continues to fulfill its primary objectives, while this central control element is centralized and/or there is a network of local, decentralized control elements, and in reality there is a combination of hardware and software that is enabled to communicate with the primary end segment of the network so that it has all the necessary information about the state of the energy network in that end segment, which includes the values of the current drawn in all phases, possibly the voltage and frequency of the network, and at the same time communicates with or is included in the end charging points, these charging points being single-phase or three-phase, when the number of phases is determined by the physical characteristics of the energy network.

The algorithms implemented in the control software application are of three types.

The first type of algorithm is used to measure or ensure values about the state, quality of the electrical network, conditions at the supply to the end segment, behind which there are already lights and charging stations, or other measuring devices (here we can also calculate the own consumption of the equipment that is part of the system connection described in the application for the invention). It is actually a very fast measuring loop, thanks to which it is possible to prevent some negative consequences of connecting the appliance to the charging station. The output is an action that disconnects the appliance and thus prevents the protection equipment of the entire network segment.

The second type of algorithm is primarily used to periodically verify the charging status for informative purposes (sending an SMS about the charging status of the car, updating information in the information system that

-3CZ 308496 B6 can be associated with this technology). The input is again data from the measurement of power ratios on the electrical network in individual phases, the output is a suitable immediate combination of phases so that consumption is balanced on all phases.

The third type of algorithm is used for prediction and planning. The input is current charging values and knowledge (working hours, schedule, current conditions on individual phases) or an estimate of the time it will take to recharge. The output is then a time schedule, or the beginning of the switching of individual phases so that the consumption is balanced and there is an even distribution of electrical energy to the consumers according to their requirements.

It should be noted that today it is no longer necessary to solve the management centrally, but it can also be a distributed form for very large networks. This means that the function of the central control element is replaced by multiple local control elements and the necessity of communication over a shared communication medium, whether metallic or wireless.

In order to function, the central control element ideally needs to know the charging characteristics or parameters of the mobile device, which are passed on to it as part of the identification process, made possible, for example, in the case of vehicles by the state license plate, with which it can be identified, the vehicle serial number, the so-called VIN code , which should be unique to the vehicle to which it is assigned, etc. The possibility of identifying the connected device using an RFID chip, PIN code, biometric data of the user, etc. is also being considered. its past and current parameters, from which the central or local control element is able to predict in what time and under the given conditions it is possible to charge the battery of the mobile device completely or to a certain level. The central control element itself, which preferably includes elements of artificial intelligence, learns and possibly adapts the operation and charging parameters so that the user can reach his goal, or the user can be recommended another location where his mobile device can be charged in case of unsatisfactory conditions under more favorable conditions, e.g. in a shorter time, which is due to the connection with higher parts of the energy network management, or a system that contains this information, typically a web application with a geographical logical distribution of charging stations. The higher part of the energy network in this concept of the invention can be considered a superior system monitoring the network load in individual locations (web server, system routing to the Internet of Things).

Furthermore, the essence of this invention is a method of controlling an AC charging station or a group of charging stations using the system described above, which includes the steps:

a. powering the protective elements of the line with a hybrid layout, the central unit for measuring the global consumption and the quality of electricity in the end line of the power network, the central control element and at least one end charging point from the phases of the power supply, while the central block measures the global consumption in all phases of the power supply and global consumption data is transferred to a central controller,

b. connecting the appliance to the final charging point, while the connection request is created by the local control unit and the request data is transferred via a shared communication medium,

c. complying with the aforementioned requirement, whereby the phase of the electrical supply, or part of its power input, is made available by switching on the phase selector,

d. measurement of global and local consumption and quality of electricity in the end line of the power network, with the central block measuring the global consumption in all phases of the electricity supply and the local block measuring the local consumption at the end charging point for the selected phase of the electricity supply, while data on global and local consumption are transferred to the central control element, and

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e. disconnection of the appliance from the final charging point, whereby the phase of the electrical supply, or part of its input, is disconnected by opening the phase selector.

In one embodiment, the data on the request to connect the appliance to the final charging point is transmitted via a shared communication medium to the central control unit, which decides whether to comply with the said request. The data on compliance with the mentioned request is transferred via a shared communication medium to the local control unit, which closes the phase selector. The disconnection of the consumer from the final charging point is initiated by the central control unit via a shared communication medium to the local control unit, which opens the phase selector.

In another embodiment, the data about the request to connect the consumer to the final charging point is transferred via a shared communication medium to the other local control units. The individual local control units compete with each other to comply with the said request, while the data on the compliance of the said request is transferred via a shared communication medium to the other local control units, and the winning local control unit turns on the phase selector. The disconnection of the consumer from the final charging point is initiated by the winning local control unit, which opens the phase selector and informs the other local control units.

In another embodiment, after the appliance is connected to the final charging point, the test phase of the electrical supply, or part of its power, is made available by switching on the phase selector. This will test the current consumption of the connected appliance from the temporary auxiliary source of electricity. Subsequently, either the phase selector switches to one of the main phases of the power supply, or part of its input power, or the test phase of the power supply can be disconnected by opening the phase selector. The switching of the phase selector is determined by the level of current consumption and the availability of power input in the individual phases of the electrical supply, which is decided by a central or local control element.

In the event of a fault condition, abnormal global and/or local consumption will be detected in at least one phase of the electrical supply through the central or of the local block of global measurement, or local consumption and quality of electricity in the end line of the power network, further to signal a faulty end charging point by the local control unit via a shared communication medium to the central control unit and to equip the fuse elements of the line with a hybrid arrangement, which will interrupt the power supply. The power supply of the fuse elements of the line with hybrid installation, the central block of measurement of global consumption and quality of electric power in the end line of the power network, the central control element, the local block of measurement of global consumption and quality of electric power in the end line of the power network and the local control element is provided by a temporary auxiliary source electrical energy. The central control element signals via a shared communication medium to the local control element the blocking of the faulty terminal charging point, and the temporary auxiliary source of electrical energy then re-closes the securing elements of the line with a hybrid arrangement.

The control system of an AC charging station or a group of charging stations for local energy networks with limited reserved capacity and the method using said system allows the selection of several operating modes.

In the mode of the first device to be charged - the vehicle that connects to the charging station, it is not possible to alternate the electric current, or power, in a phase or multiple phases, and therefore only one device is charged at a time so that it is charged as soon as possible. The task of the central control element is to prevent further charging in the case of identification and registration of other mobile devices to the shared phase, until the vehicle is manually disconnected or the consumed current drops below the limit, when another identified device can be connected. Even in this case, however, there may be a possible change of phase to a freer one so that it is possible to charge the first connected vehicle as soon as possible. For the first vehicle, the estimated time is given by the maximum current allowed in the phase and the charging characteristics of the vehicle, or by the choice of the user's charging level. Other vehicles will be charged only after reaching

-5CZ 308496 B6 charging of the first vehicle, while the central control element is able to estimate these times from the identified characteristics and inform the user of this.

In regular phase sharing mode, each phase is alternated for all charged devices so that the average charging value is the same for all devices. More charged resources can be charged earlier, less charged ones later. The central control element therefore optimizes the drawn currents and combines the charging characteristics in such a way that the drawing from all phases is balanced and maximal. If necessary, it can also disconnect the charging stations and connect them again. Even in this case, after identification, the user is informed of the charging time under the given connection conditions. Within this time, it is possible to calculate the average daily load of the charging point in the desired time interval from historical trends, and it is possible to predict the negative influence of other users on the charging time. The user will thus receive information about the minimum charging time under current conditions and a prediction under normal operation of the station.

The central control element also makes it possible to control a temporary auxiliary source of electrical energy, typically a UPS or a backup battery system, if the energy network, or a given segment of it, cannot be disconnected by a fuse without the possibility of automated putting into a functional state and is able to identify whether there has been fraud, or whether the mobile device or its characteristics correspond to a device that can be charged. In the event of a temporary exceeding of the charging current that the UPS can compensate, the central control element terminates the charging operation and disqualifies the identified means for further charging. This means that in the case of multiple abuses in a certain period of time, the central control element does not start charging at all and the user is warned in advance that charging cannot take place and the rules of the charging network have been violated. In the event of an unfortunate or targeted attack to shut down the safety elements of the charging station, it is possible with the help of the energy of a temporary auxiliary source of electricity to activate the appropriately adjusted safety element and smoothly restore the function of the power network segment. In the case of a large capacity of the temporary auxiliary source of electricity, or the use of a battery system connected to the energy segment of the network, it is possible to temporarily increase the current carrying capacity of the phase/phases and charge mobile devices connected to the charging stations more quickly.

The advantage of the proposed control system of AC charging stations or a group of charging stations for local distribution networks with limited reserved capacity according to the present invention is the objective estimation of the charging time to satisfy the customer's requirements in order to obtain information both about the expected charging time at the current time and in the case of a typical load station in the specified time interval.

The advantage is also the provision of system restoration in the event of the activation of the safety segment - function and charging will be restored for properly functioning consumers at the charging points, while the culprit of the outage will be eliminated. The system also enables the use of the maximum number of phases intended for charging, thus improving the overall condition of the energy network, only some phases are not exploited, the possibility of running on a current-limited energy network, typically public lighting, etc.

The system enables recharging as well as prevention of dangerous situations, the result of which will trigger the safety element. For this purpose, a temporary auxiliary source of electrical energy and the function of a block with fuses and a block for measuring the consumption and quality of electrical energy are used.

The presented control system of AC charging stations also allows charging of electric mobile devices with a limit lower than the one mentioned above, e.g. 5A/230V. This makes it possible to solve charging within, for example, a network intended for public lighting, etc., while this proposal does not retroactively affect the original operation of the energy network, it is subordinate to it, and technically the solution can be implemented using means that do not radically increase the cost of acquiring charging points.

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Clarification of drawings

The essence of the invention is further explained by examples of its implementation, which are described using the attached drawings, where:

Giant. 1 shows the circuit diagram of the control system of the AC charging station, in which a central control element is included,

Giant. 2 shows a detailed wiring diagram of the terminal charging point with one local control element,

Giant. 3 shows a detailed wiring diagram of the final charging point with a group of local control elements,

Giant. 4 shows the graph of the charging current in the case of alternating end charging points,

Giant. 5 shows the circuit diagram of the control system of the AC charging station, in which the test phase of the electrical supply is included, and

Giant. 6 shows a detailed wiring diagram of the terminal charging point with a group of local control elements and a test phase of the electrical supply.

Examples of implementation of the invention

The mentioned implementations show exemplary variants of the invention, which, however, have no limiting effect in terms of the scope of protection.

The invention will be explained in the following description on an exemplary embodiment of the control system of an AC charging station or a group of charging stations for local distribution networks with limited reserved capacity with reference to the relevant drawings. In the above drawings, the invention is illustrated by examples of individual variants of the design of the AC charging station control system.

An example of the connection of the control system of the AC charging station, in which the central control element 4a is included, which can be implemented as a control system with the implementation of smart or artificial intelligence, is shown in Fig. 1 and 2. The central control element 4a is located in the distribution box 10 and is connected to the securing elements of the line 2 with a hybrid layout, the temporary auxiliary source 11 of electrical energy, the central block 3a measuring the global consumption and quality of electrical energy in the end line of the energy network and the communication medium 12 for connecting to superior systems. The central control element 4a controls the switching of the end charging points 6. The central control element 4a includes the control hardware, generally these are computing means with input and output units, microcomputer, microcontroller, PLC and gate array systems and software application can be used to control the end charging points 6. The central control element 4a is connected to the end charging points 6 via a shared communication medium 7 and is further connected both to the safety elements 2 of the line with hybrid deployment and to the central block 3a for measuring the global consumption and quality of electricity in the end line of the energy network . The end charging point 6 includes a local control element 4b, to which the central control element 4a transmits information via a shared communication medium 7. This shared communication medium 7 can be implemented as a wired or wireless shared communication bus. The measurement of global energy consumption takes place in the specified hardware of the central block 3a, which does not only aim to determine the value of the current, but also checks the quality of the energy network after connecting the appliance. This value starts to become very important and the central control element 4a also works with it. The solution of the AC charging station control system conceived in this way is suitable for integrated objects where the final charging point 6 is concentrated around one position, such as a corporate parking lot with an installation site 5 in the form of a public lighting pole.

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An example of the connection of the control system of the AC charging station, in which a decentralized control system is used, is shown in Fig. 1 and 3. In such an embodiment, the system is provided with a central control element 4a and a group of local control elements 4b, which are arranged at the end charging point 6 .The first to the nth local control element 4b communicate over the shared communication medium 7, with which they are connected to each other. This variant is advantageous to use in the case of a system in which further expansion of alternating end charging points 6 with one or more connection points 8 is planned. The first to nth local control element 4b then alternate connection points 8,1. 8.2. 8,3 etc. of the final charging point 6 or points 6 according to the attached graphs Ima _X = f(t) as can be seen from Fig. 4.

An example of connecting the control system of an AC charging station with multiple connection points 8 is shown in Fig. 3. To ensure an even distribution of the load on the electrical distribution network, it is possible to use the phase selector 13. This variant takes into account the use of a central control element 4a that monitors the load of the individual phases L According to the charging request, the central control element 4a serves the connection of the charging point 8 to phase 1 with the available power. The switching is carried out using communication over a shared communication medium 7. The end charging point 6 is equipped with a reading device 9 for user identification.

Algorithms implemented in the software application for controlling the end charging points 6 enable:

1. Basic network operation security - short regulatory loop

This part of the software application has the task of protecting the entire technology from dangerous or emergency situations. Among these states, we mainly count the equipment of the securing elements of the network segment that contains the charging stations.

In practice, this means that in the case of equipping the main fuse element, the need to manually restore activity in the appropriate switchgear is segmented. In the case of using the actuator for safety element 2, it is possible to restore the function of the segment automatically by a command from the superior workplace or after a defined period of time. However, this state is undesirable and can only occur as a result of a fault that does not correspond to the state of the charging station under standard operating conditions. If the safety element 2 includes an actuator, it is possible to reset the safety element 2 in the presence of eclectic energy on the actuator. In the opposite case, when the safety element 2 is without an actuator, everything must be done manually. The actuator can be solved in different ways, generally it is a servo drive controlled from a superior system, for example an electricity provider, or preferably from a temporary auxiliary source of electricity 11, which is directly connected to the securing elements 2.

Security can take place in different ways, depending on the physical conditions.

First, the case where the central control element 4a is contained in the switchboard at the beginning of the monitored segment. Let us assume that the central control element 4a can very quickly measure the ratios on the individual phases of the network segment, more precisely it can measure the global electricity consumption and quality via the central block 3a. energy to measure the current value of voltage, current or network frequency. Furthermore, let's assume that the segment is equipped with safety elements 2, which, in the event of an overcurrent, provide shutdown within the standard given time (hundreds of milliseconds). In this case, it is possible during a fraction of the equipment time of the fuse element 2 of the network segment to turn off the connected consumer at the connection point 8, which exceeds the given current value, either directly from the central control element 4a or by command to the local control element 4b via the shared communication medium 7. Reaction time of all components must be shorter than the turnaround time of securing element 2. Implementation is commonly available nowadays.

Another case is the control of charging stations using local (dispersed, distributed) control elements 4b. Even in this case, it can very quickly come from the central block 3 for measuring global energy consumption or one of the local blocks 3 for measuring local energy consumption

-8CZ 308496 B6 warning of exceeding the maximum possible consumption and the local control element 4b can disconnect the appliance.

Another way to prevent the equipment of safety elements 2 is a temporary source 11 of electrical energy. Thanks to its inclusion behind the fuse element 2 of the end segment, it is possible to temporarily increase the maximum current that can be taken globally within the end segment of the network and also by command to stop the operation of the end charging point 6.

The weak point of this security is the presence of the securing element 2 directly in the charging station. This ensures the operation of the segment before a truly total short circuit and is necessary. This means that the securing element 2 in the charging station must be faster than the end charging point 6 of the given segment. In this way, the response time to overcurrent or short circuit can be shortened significantly. In practice, this means that the final charging point 6 will be disconnected instead of the entire segment, which is sufficient for the solution. The weak point can be removed by the presence of a unit that can measure the values of current, voltage or frequency at the location of the charging point 6, e.g. local element 3b for measuring local energy consumption. This solution is more expensive, but it solves the weak point of traffic.

2. Measurement of network parameters - medium-long regulation loop

This part of the software application is mainly used to monitor the current events on the end segment, possibly on the individual phases ]_ and allows the alternation of phases 1. This function ensures the efficiency of the use of electricity from the network and the maximum possible distribution of the load between the power phases, see Fig. 4. If some phases 1 are little used, e.g. they charge with a very small current, they can be switched and the full current capacity can be used for connection point 8, which needs maximum power (this is a situation at the beginning of charging, or to cover the power of temporary electrical devices - kettle).

3. Network and charging status prediction (medium long control loop)

This part of the application does not assess the charging process in the end segment from the point of view of the current state, but allows to plan usage with regard to the time period, statistical data from user databases, their valuation, credit, etc. According to the statistical data, it is possible to estimate the normal network load in a given time interval and inform the user about the expected progress of charging. The use of a central control element 4a allows the use of a time distribution of the charging potential of the station among all current users. The practical implementation consists in allocating a defined time interval for the user of the charging station during which his mobile device is charged. Users are grouped according to the charging power requirement to ensure efficient use of the current time window. This is how phase 1 is used effectively in the given time interval. This function closely follows the previous point, which ensures the maximization of the use of electrical energy.

To test the current consumption of the connected consumer, the test phase 1.4 of the electrical supply can be advantageously used, as shown in the system design in Fig. 5 and 6. The test phase 1.4 of the electrical supply is conducted from the temporary auxiliary source 11 of electrical energy through the central unit 3a measuring the global consumption and the quality of electricity to the phase selector 13 of at least one final charging point 6. After connecting the consumer to the final charging point 6, the test phase 1.4 of the electrical supply, or part of its power, is made available by switching on the phase selector 13. This will test the current consumption of the connected appliance from the temporary auxiliary source 11 of electrical energy. This consumption is detected by the local block 3b for measuring local energy consumption, and subsequently, after evaluating the level of current consumption using the central or local control element 4a, 4b, the phase selector 13 switches to one of the main phases 1, 1, 1, 2, 1.3 of the electrical power supply, possibly part of its input, or to disconnect the test phase 1.4 of the electrical supply by opening the phase selector 13.

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Industrial applicability

The AC charging station control system allows you to control the charging of all kinds of electric mobile 5 devices with its 16 or 32 A fuse.

Claims (11)

PATENT CLAIMS 1. Control system of an AC charging station or a group of charging stations for local distribution networks with limited reserved capacity, including phases (1) power supply, fuse elements (2) lines with hybrid deployment, central block (3a) measurement of global consumption and quality of electricity in the end line of the energy network, a shared communication medium (7) and at least one end charging point (6) with a device (9) for identifying the user and at least one connection point (8), whereby the fuse elements are fed from the phases (1) of the power supply (2) a line with a hybrid layout, a central unit (3a) for measuring the global consumption and quality of electrical energy and at least one final charging point (6), characterized in that the system is provided with a central control element (4a) for controlling at least one final charging point point (6) and for monitoring the global load of phases (1) of the electrical supply, and is further equipped with at least one local control element (4b) located at the end charging point (6) for monitoring the local load of phases (1) of the electrical supply in individual end charging points points (6), while the central control element (4a) is connected to each local control element (4b) via a shared communication medium (7), and is also connected to the securing elements (2) of the line with a hybrid layout and to the central block (3a) measuring global electricity consumption and quality. 2. The system according to claim 1, characterized in that the central control element (4a) and the local control element (4b) include a software application and control hardware formed by a computing device, which is a microcomputer or a microcontroller or a gate array system or a PLC. 3. The system according to claim 1, characterized in that the central control element (4a) is further connected to a temporary auxiliary source (11) of electrical energy and to a communication medium (12) for connection to superior systems, whereby the temporary auxiliary source (11) of electrical energy energy is connected to the phases (1) of the power supply between the fuse elements (2) of the line with a hybrid arrangement and the central block (3a) of measuring the global consumption and quality of electricity, while the temporary auxiliary source of electricity (11) is further connected directly to the fuse elements (2) lines with hybrid deployment and to the central block (3a) measurement of global consumption and quality of electrical energy. 4. The system according to claim 1, characterized in that the phases (1) of the electrical supply are connected to at least one connection point (8) at the final charging point (6) via the phase selector (13) and the local block (3b) measuring the local consumption and quality of electric power in the end line of the power network, while the local block (3b) measuring the local consumption and quality of electric power is connected to the local control element (4b) further connected to the phase selector (13), while the local control element (4b ) is connected to a device (9) for user identification. 5. System according to claim 1, 3 and 4, characterized in that from the temporary auxiliary source (11) of electrical energy via the central unit (3a) for measuring the global consumption and quality of electrical energy to the phase selector (13) of at least one final charging point (6) the test phase (1.4) of the electrical supply is conducted. 6. The system according to claim 1, characterized in that the location (5) of the installation of the end charging point (6) is a public lighting pole or a post near the parking space. 7. A method of controlling an AC charging station or a group of charging stations using a system according to any one of the preceding claims, characterized in that it comprises the steps of: a. powering the securing elements (2) of the line with hybrid installation, the central block (3a) measuring the global consumption and quality of electricity in the end line of the energy network, the central control element (4a) and at least one end charging point (6) from the phases (1 ) of the electrical supply, whereby the central block (3a) measures the global consumption in all phases (1) of the electrical supply and the global consumption data is transferred to the central control element (4a), b. connecting the appliance to the final charging point (6), whereby the connection request is created by the local control unit (4b) and the request data is transferred via a shared communication medium (7), c. complying with the above requirement, whereby phase (1) of the electrical supply, or part of its power input, is made available by switching on the phase selector (13), d. measurement of global and local consumption and quality of electricity in the end line of the energy network, with the central block (3a) measuring the global consumption in all phases (1) of the electricity supply and the local block (3b) measuring the local consumption at the end charging point (6) for the selected phase (1) of the electrical supply, with global and local consumption data being transferred to the central control element (4a), and e. disconnection of the consumer from the final charging point (6), whereby phase (1) of the electrical supply, or part of its input power, is disconnected by opening the phase selector (13). 8. The method according to claim 7, characterized in that the data on the request to connect the appliance to the final charging point (6) are transmitted via a shared communication medium (7) to the central control unit (4a), which decides whether to comply with the said request, while the data about compliance with the mentioned request are transmitted via the shared communication medium (7) to the local control unit (4b), which turns on the phase selector (13), while the disconnection of the consumer from the final charging point (6) is initiated by the central control unit (4a) via the shared communication medium (7) to the local control unit (4b), which opens the phase selector (13). 9. The method according to claim 7, characterized in that the data on the request to connect the consumer to the final charging point (6) are transmitted via a shared communication medium (7) to the other local control units (4b), while the individual local control units (4b) they compete with each other to comply with said request, while the data on complying with said request is transmitted via a shared communication medium (7) to the other local control units (4b) and the winning local control unit (4b) closes the phase selector (13), disconnecting the consumer from of the final charging point (6) is initiated by the winning local control unit (4b), which opens the phase selector (13) and informs the other local control units (4b). 10. The method according to any one of claims 7 to 9, characterized in that, after connecting the consumer to the end charging point (6), the test phase (1.4) of the electrical supply, or part of its power input, is made available by switching on the phase selector (13), whereby to test the current consumption of the connected appliance from the temporary auxiliary source (11) of electrical energy, with the selector (13) subsequently switching the phase to one of the phases (1.1, 1.2, 1.3) of the electrical supply, or part of its input, or disconnecting the test phase ( 1.4) of the electrical supply by opening the phase selector (13). 11. The method according to any one of claims 7 to 9, characterized in that abnormal global and/or local consumption is detected in at least one phase (1) of the electrical supply through a central or of the local block (3a, 3b) of global measurement, or of local consumption and quality of electricity in the end line of the power network, to signal the faulty end charging point (6) by the local control unit (4b) via a shared communication medium (7) to the central control unit (4a) and to equip the safety elements (2) of the line with hybrid by the deployment, thereby interrupting the electrical supply, while the supply of the protection elements (2) of the line with hybrid deployment, the central block (3a) measuring the global consumption and quality of electricity in the end line of the power network, the central control element (4a), the local block (3b ) measurement of the global consumption and quality of electric power in the end line of the power network and the local control element (4b) is provided by a temporary auxiliary source (11) of electric power, while the central control element (4a) signals via a shared communication medium (7) to the local control element ( 4b) the blocking of the faulty final charging point (6) and the temporary auxiliary source (11) of electrical energy subsequently re-closes the securing elements (2) of the line with a hybrid arrangement.