CN110660165A - Extensible modular electricity selling system and using method - Google Patents
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Abstract
The invention discloses an extensible modular electricity selling system and a using method thereof, and relates to an electricity selling system and a using method thereof, wherein an electric energy meter is matched with the electricity selling system connected with the electric energy meter, the types of the electric energy meter and the electricity selling system are selected according to actual requirements, different using environments can be adapted, the requirement of logistics of different communities on reform of community electricity utilization management is met, the user paying mode is diversified, modules can be taken or rejected according to actual conditions, products are integrated with management and automatic control, electricity utilization prepayment is realized, metering is accurate, cutting-off is reliable, the power supply management efficiency can be improved, and the management requirements of electricity utilization in communities, student apartments and collective dormitories are met; the electric energy meter adopts a selectable high-grade or low-grade electric energy meter, the electricity selling system adopts a charging card electricity selling system and a remote electricity selling system to select or cooperate, the selection can be carried out according to the actual requirement, the selection form is diversified, and the requirements of different communities on the system can be met.
Description
Technical Field
The invention relates to the field of electricity selling, in particular to an extensible modular electricity selling system and a using method thereof.
Background
The traditional common electric energy meter needs to regularly send a specially-assigned person to read meter and charge electricity, the workload is large, and much inconvenience is brought to the centralized management of apartment power supply. If a plurality of electric energy meters are arranged in a special room in a centralized way, a large space is occupied, in addition, the engineering complexity, the subsequent structure, the configuration of electric appliances and the like are expensive, and meanwhile, a specially assigned person needs to pay for the electric charge.
In order to solve the above problems, the company has independently developed a prepaid electric energy meter management system. This electric energy meter management system has satisfied the demand that the logistics of community reformed to community power consumption management, and the user mode of paying for the fee selects the diversification, can carry out the accepting and rejecting of module according to actual conditions, and product collection management and automatic control are as an organic whole, and the power consumption prepayment, the measurement is accurate, cuts off reliably, can improve power supply management efficiency, satisfies the management demand of community, student's apartment, dormitory power consumption.
Disclosure of Invention
The invention aims to: the utility model provides an expanded modularization electricity selling system and application method, solved the demand of different communities ' logistics to community power consumption management reform, not only user's mode of paying selects the diversification to can carry out the accepting or rejecting of module according to actual conditions, the product collection management is as an organic whole with automatic control, the power consumption prepayment, the measurement is accurate, cuts off reliably, can improve power supply management efficiency, satisfies the management demand of community, student's apartment, collective dormitory power consumption.
The technical scheme adopted by the invention is as follows:
an expandable modular electricity selling system comprises an electric energy meter and an electricity selling system in communication connection with the electric energy meter, wherein the electricity selling system is divided into a charging card electricity selling system and a remote electricity selling system, the two systems can be operated independently or combined to operate,
wherein, the charging card electricity-selling system comprises a charging card, an electricity-selling computer, a card reading-writing module and an electric energy meter, and completes the electricity charging and selling process by the cooperation of electricity-selling software and the modules,
the remote electricity selling system comprises a cloud server, electricity selling software, a network encryption machine and an electric energy meter; the cloud server is connected with the electricity selling computer and the network encryption machine, and the electric energy meter is downloaded with the private key;
the electricity selling system comprises a key management platform, wherein the key management platform comprises a master control UKEY, a key UKEY and a user UKEY;
the master control UKEY is used for issuing a user UKEY and a key UKEY;
the user UKEY is used for encrypting data of a terminal user and authorizing a terminal electricity selling end;
the key UKEY is responsible for downloading or recovering the key of the electric energy meter of the electricity selling system;
the charging card electricity selling system is divided into a single machine version and a network version, wherein the single machine version charging card electricity selling system reads a user UKEY by using an electric energy meter;
the network version charging card electricity selling system uses an electricity selling computer to read the UKEY of the user in a matching way.
The electricity selling system is divided into a charging card electricity selling system and a remote electricity selling system, and one of the two systems can be selected to independently operate or be installed and used according to actual conditions;
the charging card electricity selling system comprises a charging card, an electricity selling computer, a card reading and writing module and an electric energy meter, and the charging and electricity selling process is completed through electricity selling software cooperating with the modules. Meanwhile, the card read-write module is connected to the electricity selling computer, after the user pays, the computer transmits the payment data into an encryption device (UKEY or a network encryption machine) to become encrypted data, and the computer writes the encrypted data into a charging card of the user through the card read-write module. The charging card is inserted into the electric energy meter, and corresponding money amount is charged into the electric energy meter to complete the charging process after the data decryption of the electric energy meter.
The remote electricity selling system comprises a cloud server, an electricity selling computer, a network encryption machine and an electric energy meter; the cloud server is connected with the electricity selling computer and the network encryption machine, and the electric energy meter is downloaded with the private key; transmitting the data to be written into a network encryption machine and returning the encrypted data; writing the encrypted data into the electric energy meter through a remote communication system; the electric energy meter is the electric energy meter which is downloaded with the private key, so that the downloaded private key on the electric energy meter is used for decryption regardless of encrypted data transmitted from the electricity selling card or the cloud server; and then writing the decrypted data into the electric energy meter.
For the key management platform, the key of the system is controlled by the master UKEY, the key UKEY and the user UKEY. All keys are generally USB flash disk-mounted devices, have USB interfaces, and can be inserted into a computer to work with software. The master control UKEY is used for issuing a user UKEY and a key UKEY; and the key UKEY is responsible for downloading or recovering the key of the electric energy meter. The user UKEY is used for remote parameter read-write encryption and data encryption of a local read-write card.
The charging card electricity selling system is divided into different versions to meet the requirements of different users, wherein the single version is suitable for residential districts and business districts with fewer users and low management requirements. Charging the property payment and charging to the charging card by using the charging card, and then inserting the charging card into the electric energy meter to charge to the electric energy meter; the network version charging card electricity selling system is a network encryption machine connected to a cloud server, and for data, a single version is placed on a local computer, and a network version is placed on the network encryption machine.
Furthermore, the UKEY of the user in the charging card electricity selling system is a physical form card used for storing user information and charging balance,
and the user UKEY in the remote electricity selling system is a network version user UKEY and is communicated through remote acquisition.
Generally, in a charging card electricity selling model system, a charging card is needed to be used for storing a user UKEY, the user UKEY is a charging card at the moment, and the user UKEY in a remote electricity selling system carries out user identification and authentication through a user account and a password issued by the master UKEY.
Further, the use method of the electricity selling system in communication connection with the electric energy meter comprises the following steps:
s1: downloading a key to the electric energy meter through the key UKEY issued by the master control UKEY;
s2: the user UKEY issued by the user through the master control UKEY carries out remote parameter read-write encryption on electricity selling software or an electricity selling computer, and data of a local read-write card is encrypted;
s3: the electricity selling software or the electricity selling computer writes the encrypted data into the electric energy meter;
s4: and the electric energy meter decrypts the data and writes the data into the electric energy meter.
Further, the method for downloading the key for the power meter by the key UKEY in the step S1 includes the following steps:
s11: the key UKEY is accessed into a computer, and the electric energy meter is connected with the computer through an adapter;
s12: the method comprises the steps that the computer uses electric energy meter secret key downloading software to obtain a communication address of the electric energy meter through a converter;
s13: then communicating with a secret key UKEY to obtain an authentication ciphertext, a random number and a dispersion factor;
s14: then, performing public key identity authentication on the electric energy meter according to a protocol;
s15: the electric energy meter key downloads software to determine whether the authentication is passed or not;
s17: after passing, communicating with a secret key UKEY to obtain a private key;
s18: and then the private key is issued to the electric energy meter through the converter.
Further, the method for encrypting the electricity selling card by the electricity selling software or the electricity selling computer in the step S2 includes the following steps:
s21: (single-machine charging card electricity selling system) inserts user UKEY into computer, charging card is connected with computer through card reader/writer;
s22: (network version charging card electricity selling system) the charging card is connected with the computer through the card reader-writer, and the computer is connected with the network encryption machine through the cloud server;
s23: transmitting data to be written into a user UKEY (or a network encryption machine) and returning encrypted data;
s24: and writing the encrypted data into the charging card.
Further, the encryption method for the electricity selling software in the remote electricity selling system to remotely write data into the electric energy meter in the step S3 includes the following steps:
s31: the power selling computer is connected with the cloud server, and the network encryption machine is also connected with the cloud server;
s32: transmitting the data to be written into a network encryption machine, and returning the encrypted data;
s33: writing the encrypted data into the electric energy meter through a remote communication system;
furthermore, the electric energy meter is divided into a low-grade electric energy meter and a high-grade electric energy meter,
the low-grade electric energy meter is a prepayment electric energy meter, and the electric energy meter state information of the low-grade electric energy meter comprises a local account opening state, a remote account opening state, an electricity protection state, an arrearage state, an overdraft state, an available credit amount state, an alarm amount state, a card insertion state when the electric charge is 0, a three-phase voltage open-phase state and an electric brake state.
Furthermore, the high-grade electric energy meter is a charge control electric energy meter which meets the national power grid company standard, and is also provided with functions of rate electricity price, step electricity price, electricity price in the rich and low water season, multi-month settlement electricity quantity recording, event recording and the like;
the high-grade electric energy meter is performed by an ESAM chip which is specially responsible for encryption and decryption in the electric energy meter, and a secret key and an encryption algorithm of the high-grade electric energy meter are unrelated to a program, so that the safety is higher; the cost control electric energy meter is provided with an RS485 infrared communication interface and a modularized communication interface; the modularized communication interface can be plugged with different carrier modules and wireless communication modules according to needs so as to realize the centralized collection of regional electric energy meter information.
The high-grade electric energy meter is a cost control electric energy meter which meets the national grid company standard. Compared with low-end electric energy meters, the electric energy meter has the advantages of stronger function, higher safety and more communication means. The prepayment electric energy meter (low-grade electric energy meter) is only a single-rate electric energy meter, and has no rate electricity price, step electricity price, electricity price in the rich and low water period, no multi-month settlement electric quantity record and no event record. The cost control electric energy meter (high-grade electric energy meter) has the functions; the data encryption of the communication process of the prepayment electric energy meter is carried out by software in a CPU, the fee control electric energy meter is carried out by an ESAM chip which is specially responsible for encryption and decryption in the electric energy meter, and a secret key and an encryption algorithm of the fee control electric energy meter are independent of a program, so that the safety is higher; the charge control electric energy meter is provided with an RS485 infrared communication interface as a prepayment electric energy meter, and is also provided with a modularized communication interface. The modularized communication interface can be plugged with different carrier modules and wireless communication modules according to needs so as to realize the centralized collection of regional electric energy meter information.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the invention relates to an expandable modular electricity selling system and a using method thereof, wherein an electric energy meter is matched with an electricity selling system connected with the electric energy meter, the type of the electric energy meter and the type of the electricity selling system are selected according to actual requirements, different using environments can be adapted, the requirement of different community logistics on reform of community electricity utilization management is solved, not only can the user payment modes be diversified, but also the module can be taken or rejected according to the actual conditions, the product integrates management and automatic control into a whole, electricity utilization prepayment is realized, metering is accurate, cutting-off is reliable, the power supply management efficiency can be improved, and the management requirements of electricity utilization in communities, student apartments and collective dormitories are met.
2. The invention relates to an expandable modular electricity selling system and a using method thereof, wherein the electric energy meter adopts a selectable high-grade or low-grade electric energy meter, the electricity selling system adopts a charging card electricity selling system and a remote electricity selling system for selection or matched use, the selection can be carried out according to actual requirements, the selection form is diversified, and the requirements of different communities on the system can be met.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a block diagram of the system configurability of the present invention;
FIG. 2 is a simulation diagram of a remote electricity vending system of the present invention;
FIG. 3 is a simulation diagram of the full-function electricity selling system of the present invention
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The present invention will be described in detail with reference to fig. 1 to 3.
Example 1
An expandable modular electricity selling system comprises an electric energy meter and an electricity selling system in communication connection with the electric energy meter, wherein the electricity selling system is divided into a charging card electricity selling system and a remote electricity selling system, the two systems can be operated independently or combined to operate,
wherein, the charging card electricity-selling system comprises a charging card, an electricity-selling computer, a card reading-writing module and an electric energy meter, and completes the electricity charging and selling process by the cooperation of electricity-selling software and the modules,
the remote electricity selling system comprises a cloud server, electricity selling software, a network encryption machine and an electric energy meter; the cloud server is connected with the electricity selling computer and the network encryption machine, and the electric energy meter is downloaded with the private key;
the electricity selling system comprises a key management platform, wherein the key management platform comprises a master control UKEY, a key UKEY and a user UKEY;
the master control UKEY is used for issuing a user UKEY and a key UKEY;
the user UKEY is used for encrypting data of a terminal user and authorizing a terminal electricity selling end;
the key UKEY is responsible for downloading or recovering the key of the electric energy meter of the electricity selling system;
the charging card electricity selling system is divided into a single machine version and a network version, wherein the single machine version charging card electricity selling system reads a user UKEY by using an electric energy meter;
the network version charging card electricity selling system uses an electricity selling computer to read the UKEY of the user in a matching way.
The electricity selling system is divided into a charging card electricity selling system and a remote electricity selling system, and one of the two systems can be selected to independently operate or be installed and used according to actual conditions;
the charging card electricity selling system comprises a charging card, an electricity selling computer, a card reading and writing module and an electric energy meter, and the charging and electricity selling process is completed through electricity selling software cooperating with the modules. Meanwhile, the card read-write module is connected to the electricity selling computer. After the user pays, the computer transmits the payment data into an encryption device (UKEY or network encryption machine) to become encrypted data, and the computer writes the encrypted data into the user's charging card through the card read-write module. The charging card is inserted into the electric energy meter, and corresponding money amount is charged into the electric energy meter to complete the charging process after the data decryption of the electric energy meter.
The remote electricity selling system comprises a cloud server, an electricity selling computer, a network encryption machine and an electric energy meter; the cloud server is connected with the electricity selling computer and the network encryption machine, and the electric energy meter is downloaded with the private key; transmitting the data to be written into a network encryption machine and returning the encrypted data; writing the encrypted data into the electric energy meter through a remote communication system; the electric energy meter is the electric energy meter which is downloaded with the private key, so that the downloaded private key on the electric energy meter is used for decryption regardless of encrypted data transmitted from the electricity selling card or the cloud server; and then writing the decrypted data into the electric energy meter.
For the key management platform, the key of the system is controlled by the master UKEY, the key UKEY and the user UKEY. All keys are generally USB flash disk-mounted devices, have USB interfaces, and can be inserted into a computer to work with software. The master control UKEY is used for issuing a user UKEY and a key UKEY; and the key UKEY is responsible for downloading or recovering the key of the electric energy meter. The user UKEY is used for remote parameter read-write encryption and data encryption of a local read-write card.
The charging card electricity selling system is divided into different versions to meet the requirements of different users, wherein the single version is suitable for residential districts and business districts with fewer users and low management requirements. Charging the property payment and charging to the charging card by using the charging card, and then inserting the charging card into the electric energy meter to charge to the electric energy meter; the network version charging card electricity selling system is a network encryption machine connected to a cloud server, and for data, a single version is placed on a local computer, and a network version is placed on the network encryption machine.
Example 2
The present embodiment is different from embodiment 1 only in that the user UKEY in the charging card electricity selling system is a physical form card for storing user information and charging balance,
and the user UKEY in the remote electricity selling system is a network version user UKEY and is communicated through remote acquisition.
Generally, in a charging card electricity selling model system, a charging card is needed to be used for storing a user UKEY, the user UKEY is a charging card at the moment, and the user UKEY in a remote electricity selling system carries out user identification and authentication through a user account and a password issued by the master UKEY.
Example 3
The use method of the electricity selling system in communication connection with the electric energy meter comprises the following steps:
s1: downloading a key to the electric energy meter through the key UKEY issued by the master control UKEY;
s2: the user UKEY issued by the user through the master control UKEY carries out remote parameter read-write encryption on electricity selling software or an electricity selling computer, and data of a local read-write card is encrypted;
s3: the electricity selling software or the electricity selling computer writes the encrypted data into the electric energy meter;
s4: and the electric energy meter decrypts the data and writes the data into the electric energy meter.
Example 4
This embodiment is a further description of embodiment 3, and the method for downloading the key from the key UKEY to the electric energy meter in step S1 includes the following steps:
s11: the key UKEY is accessed into a computer, and the electric energy meter is connected with the computer through an adapter;
s12: the method comprises the steps that the computer uses electric energy meter secret key downloading software to obtain a communication address of the electric energy meter through a converter;
s13: then communicating with a secret key UKEY to obtain an authentication ciphertext, a random number and a dispersion factor;
s14: then, performing public key identity authentication on the electric energy meter according to a protocol;
s15: the electric energy meter key downloads software to determine whether the authentication is passed or not;
s17: after passing, communicating with a secret key UKEY to obtain a private key;
s18: and then the private key is issued to the electric energy meter through the converter.
Example 5
This embodiment is a further description of embodiment 3, and the method for encrypting the electricity selling card by the electricity selling software or the electricity selling computer in step S2 includes the following steps:
s21: (single-machine charging card electricity selling system) inserts user UKEY into computer, charging card is connected with computer through card reader/writer;
s22: (network version charging card electricity selling system) the charging card is connected with the computer through the card reader-writer, and the computer is connected with the network encryption machine through the cloud server;
s23: transmitting data to be written into a user UKEY (or a network encryption machine) and returning encrypted data;
s24: and writing the encrypted data into the charging card.
Example 6
This embodiment is a further description of embodiment 3, and the encryption method for remotely writing data to the electric energy meter by the electricity selling software in the remote electricity selling system in step S3 includes the following steps:
s31: the power selling computer is connected with the cloud server, and the network encryption machine is also connected with the cloud server;
s32: transmitting the data to be written into a network encryption machine, and returning the encrypted data;
s33: writing the encrypted data into the electric energy meter through a remote communication system;
example 7
Furthermore, the electric energy meter is divided into a low-grade electric energy meter and a high-grade electric energy meter,
the low-grade electric energy meter is a prepayment electric energy meter, and the electric energy meter state information of the low-grade electric energy meter comprises a local account opening state, a remote account opening state, an electricity protection state, an arrearage state, an overdraft state, an available credit amount state, an alarm amount state, a card insertion state when the electric charge is 0, a three-phase voltage open-phase state and an electric brake state.
The decryption process of the electric energy meter is as follows:
firstly, the electric energy meter must be the electric energy meter which has downloaded the private key
Whether the encrypted data transmitted from the charging card or RS485 is encrypted, the encrypted data is decrypted by using a downloaded private key on the electric energy meter;
writing the decrypted data into the electric energy meter;
the following table is a corresponding table for each state of the low-grade electric energy meter
Example 8
Furthermore, the high-grade electric energy meter is also provided with functions of rate electricity price, step electricity price, electricity price in the rich and low water season, multi-month settlement electricity quantity recording, event recording and the like;
the high-grade electric energy meter is performed by an ESAM chip which is specially responsible for encryption and decryption in the electric energy meter, and a secret key and an encryption algorithm of the high-grade electric energy meter are unrelated to a program, so that the safety is higher; the cost control electric energy meter is provided with an RS485 infrared communication interface and a modularized communication interface; the modularized communication interface can be plugged with different carrier modules and wireless communication modules according to needs so as to realize the centralized collection of regional electric energy meter information.
The high-grade electric energy meter is a cost control electric energy meter which meets the national grid company standard. Compared with low-end electric energy meters, the electric energy meter has the advantages of stronger function, higher safety and more communication means. The prepayment electric energy meter (low-grade electric energy meter) is only a single-rate electric energy meter, and has no rate electricity price, step electricity price, electricity price in the rich and low water period, no multi-month settlement electric quantity record and no event record. The cost control electric energy meter (high-grade electric energy meter) has the functions; the data encryption of the communication process of the prepayment electric energy meter is carried out by software in a CPU, the fee control electric energy meter is carried out by an ESAM chip which is specially responsible for encryption and decryption in the electric energy meter, and a secret key and an encryption algorithm of the fee control electric energy meter are independent of a program, so that the safety is higher; the charge control electric energy meter is provided with an RS485 infrared communication interface as a prepayment electric energy meter, and is also provided with a modularized communication interface. The modularized communication interface can be plugged with different carrier modules and wireless communication modules according to needs so as to realize the centralized collection of regional electric energy meter information.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be made by those skilled in the art without inventive work within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (8)
1. The utility model provides an expanded modularization electricity selling system, includes the electric energy meter to and sell electric system with electric energy meter communication connection, its characterized in that: the electricity selling system is divided into a charging card electricity selling system and a remote electricity selling system, the two systems can be operated independently or combined together,
wherein, the charging card electricity-selling system comprises a charging card, an electricity-selling computer, a card reading-writing module and an electric energy meter, and completes the electricity charging and selling process by the cooperation of electricity-selling software and the modules,
the remote electricity selling system comprises a cloud server, electricity selling software, a network encryption machine and an electric energy meter; the cloud server is connected with the electricity selling computer and the network encryption machine, and the electric energy meter is downloaded with the private key;
the electricity selling system comprises a key management platform, wherein the key management platform comprises a master control UKEY, a key UKEY and a user UKEY;
the master control UKEY is used for issuing a user UKEY and a key UKEY;
the user UKEY is used for encrypting data of a terminal user and authorizing a terminal electricity selling end;
the key UKEY is responsible for downloading or recovering the key of the electric energy meter of the electricity selling system;
the charging card electricity selling system is divided into a single machine version and a network version, wherein the single machine version charging card electricity selling system reads a user UKEY by using an electric energy meter;
the network version charging card electricity selling system uses an electricity selling computer to read the UKEY of the user in a matching way.
2. The scalable modular electricity vending system of claim 1, wherein: the UKEY of the user in the charging card electricity selling system is a physical form card used for storing user information and charging balance,
and the user UKEY in the remote electricity selling system is a network version user UKEY and is communicated through remote acquisition.
3. The expandable modular electricity selling system and the using method thereof according to claim 1, wherein: the use method of the electricity selling system in communication connection with the electric energy meter comprises the following steps:
s1: downloading a key to the electric energy meter through the key UKEY issued by the master control UKEY;
s2: the user UKEY issued by the user through the master control UKEY carries out remote parameter read-write encryption on electricity selling software or an electricity selling computer, and data of a local read-write card is encrypted;
s3: the electricity selling software or the electricity selling computer writes the encrypted data into the electric energy meter;
s4: and the electric energy meter decrypts the data and writes the data into the electric energy meter.
4. The expandable modular electricity selling system and the using method thereof according to claim 3, wherein the expandable modular electricity selling system comprises: the method for downloading the key for the electric energy meter by the key UKEY in the step S1 comprises the following steps:
s11: the key UKEY is accessed into a computer, and the electric energy meter is connected with the computer through an adapter;
s12: the method comprises the steps that the computer uses electric energy meter secret key downloading software to obtain a communication address of the electric energy meter through a converter;
s13: then communicating with a secret key UKEY to obtain an authentication ciphertext, a random number and a dispersion factor;
s14: then, performing public key identity authentication on the electric energy meter according to a protocol;
s15: the electric energy meter key downloads software to determine whether the authentication is passed or not;
s17: after passing, communicating with a secret key UKEY to obtain a private key;
s18: and then the private key is issued to the electric energy meter through the converter.
5. The expandable modular electricity selling system and the using method thereof according to claim 3, wherein the expandable modular electricity selling system comprises: the method for encrypting the read-write of the electricity selling software or the electricity selling computer to the electricity selling card in the step S2 comprises the following steps:
s21: (single-machine charging card electricity selling system) inserts user UKEY into computer, charging card is connected with computer through card reader/writer;
s22: (network version charging card electricity selling system) the charging card is connected with the computer through the card reader-writer, and the computer is connected with the network encryption machine through the cloud server;
s23: transmitting data to be written into a user UKEY (or a network encryption machine) and returning encrypted data;
s24: and writing the encrypted data into the charging card.
6. The expandable modular electricity selling system and the using method thereof according to claim 3, wherein the expandable modular electricity selling system comprises: the encryption method for remotely writing data into the electric energy meter by the electricity selling software in the remote electricity selling system in the step S3 comprises the following steps:
s31: the power selling computer is connected with the cloud server, and the network encryption machine is also connected with the cloud server;
s32: transmitting the data to be written into a network encryption machine, and returning the encrypted data;
s33: and writing the encrypted data into the electric energy meter through the remote communication system.
7. The scalable modular electricity vending system of claim 1, wherein: the electric energy meter is divided into a low-grade electric energy meter and a high-grade electric energy meter,
the low-grade electric energy meter is a prepayment electric energy meter, and the electric energy meter state information of the low-grade electric energy meter comprises a local account opening state, a remote account opening state, an electricity protection state, an arrearage state, an overdraft state, an available credit amount state, an alarm amount state, a card insertion state when the electric charge is 0, a three-phase voltage open-phase state and an electric brake state.
8. The scalable modular electricity vending system of claim 7, wherein: the high-grade electric energy meter is a charge control electric energy meter which meets the national power grid company standard, and is also provided with functions of rate electricity price, step electricity price, electricity price in the rich and low water season, multi-month settlement electricity quantity recording, event recording and the like;
the high-grade electric energy meter is performed by an ESAM chip which is specially responsible for encryption and decryption in the electric energy meter, and a secret key and an encryption algorithm of the high-grade electric energy meter are unrelated to a program, so that the safety is higher; the cost control electric energy meter is provided with an RS485 infrared communication interface and a modularized communication interface; the modularized communication interface can be plugged with different carrier modules and wireless communication modules according to needs so as to realize the centralized collection of regional electric energy meter information.
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