A method for remotely classifying and managing loads

Abstract

The present application relates to the field of remote security power management of power distribution network operation company, and particularly relates to a method for remotely classifying and managing loads, comprising the following steps: S1. After a marketing system issues a tripping instruction to a special transformer terminal, the special transformer terminal attracts an output control relay, and a station end BSCC device of an electric power bureau acquires a tripping signal through a self switch value input interface; S2. The tripping signal is communicated and transmitted; S3. The tripping operation is executed and confirmed; and S4. A closing process is performed. The above steps can realize remote tripping of a specific area load (such as an office area) of a special line customer, without affecting the power consumption of important loads (such as factory production) of the special line customer, thereby improving the work efficiency of the power distribution field operation company and avoiding significant losses possibly caused by important loads (factory production processes) of the special line customer.

Description

Technical Field

[0001] This invention relates to the field of remote management of power bureaus, and in particular to a method for remotely classifying and managing loads. Background Technology

[0002] Before the rural power grid renovation in 1998, there were approximately 2,400 county-level power supply bureaus and enterprises in China responsible for rural power transmission. At that time, the assets were roughly divided as follows: one-third were directly managed by the higher-level power grid company (called directly managed and directly supplied counties); one-third were operated independently by the power supply bureaus or enterprises (called wholesale counties); and the remaining one-third were entirely self-managed and self-supplied by the enterprises (called self-managed and self-supplied counties). Meanwhile, for dedicated line customers of the power supply bureaus (customers with production and office areas), in case of arrears, to avoid affecting the safety of production equipment and personnel, it was necessary to remotely disconnect the power to the office buildings of these dedicated line customers, while maintaining power supply to the factory area. The distance from the substation to the customer's end could be as far as ten kilometers, so a solution needed to be found for how to remotely disconnect the power to the customer's office area without affecting the factory's production power supply.

[0003] To address the aforementioned problems, this invention provides a method for remotely classifying and managing loads. Summary of the Invention

[0004] The purpose of this invention is to provide a method for remotely classifying and managing loads, which solves the problem mentioned in the background art regarding the power bureau's separate power outage operation on the office area of ​​a dedicated line customer without affecting the power supply for factory production.

[0005] BSCC, short for Safe Electricity Measurement and Control Terminal, is an intelligent terminal device with certain edge computing capabilities. It uses digital and sensor technologies to detect and analyze parameters such as line current, voltage, and line closure status, achieving automatic topology analysis, as well as remote metering, remote power rationing, analysis and early warning of electricity theft, and illegal electricity use.

[0006] The marketing system, also known as the electricity marketing management system, focuses on the calculation and collection of electricity fees, and manages the entire process of customer account opening, meter reading, metering, accounting, and billing.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A method for remotely classifying and managing workloads, the method comprising the following steps:

[0009] S1. After the marketing system sends a trip command to the dedicated transformer acquisition terminal, the dedicated transformer terminal activates the output control relay, and the power bureau's management terminal BSCC device obtains the trip signal through its own switch input interface;

[0010] S2. The circuit breaker signal is transmitted via communication. The following steps are also required during the communication transmission process:

[0011] (1) The circuit breaker signal is encrypted using the SM4 algorithm;

[0012] (2) Encode the encrypted circuit breaker signal into a string and send it to the dedicated line user's station by calling the SMS platform interface;

[0013] (3) After receiving the SMS, the station terminal of the dedicated line user first performs the decoding operation;

[0014] (4) Perform the decryption operation;

[0015] (5) Perform calculations and verifications on the decrypted signals;

[0016] (6) Determine the time node;

[0017] (7) Perform the circuit breaker operation;

[0018] S3. Execute and confirm the circuit breaker operation. The specific steps are as follows;

[0019] (1) After receiving the circuit breaker signal at the station end of the dedicated line user, the circuit breaker is tripped by outputting the circuit breaker signal through the relay;

[0020] (2) The station-side BSCC of the dedicated line user detects the execution status of the action through the feedback contact on the circuit breaker;

[0021] (3) If the feedback contact is open or closed, the circuit breaker tripping is completed. The success message will be returned to the station terminal of the dedicated line user via SMS and the successful tripping message will be sent to the management terminal of the power bureau.

[0022] (4) If the feedback contact does not act, repeat the above actions. If there is still no action after repeating three times, send a text message indicating that the circuit breaker failed to trip to the station of the dedicated line user and send a text message indicating that the circuit breaker failed to trip to the management terminal of the power bureau.

[0023] S4. Perform the closing process.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] The above steps enable remote, individual power outages to the office areas of dedicated line customers without affecting their factory production power consumption, thus improving the efficiency of the power bureau and preventing losses during the production process of dedicated line customers' factories. Attached Figure Description

[0026] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0027] In the attached diagram:

[0028] Figure 1 This is a schematic diagram of the communication process in this invention;

[0029] Figure 2 This is a switch status table of the device in various situations in this invention. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0031] This invention provides the following technical solutions:

[0032] As shown in the figure, the station end is the control end of the power bureau, and the remote end is the control end of the dedicated line customer.

[0033] A method for remotely classifying and managing workloads, the method comprising the following steps:

[0034] S1. Obtaining the circuit breaker signal

[0035] After the marketing system issues a circuit breaker command to the dedicated transformer acquisition terminal, the dedicated transformer terminal activates the output control relay, and the station-end BSCC—Control Transmission Unit—(Generator) equipment obtains the circuit breaker signal through its own switch input interface.

[0036] S2. Communication Transmission and Encryption

[0037] The station-side BSCC needs to transmit a trip signal to the remote BSCC before the remote BSCC can perform the trip action. Since the maximum distance between the station and the remote BSCC exceeds 10km, and communication between the station and the remote BSCC cannot be achieved through a third-party platform, the station and the remote BSCC use SMS to send commands.

[0038] Data sent from the station to the remote end is encrypted using the SM4 algorithm (block cipher algorithm). The key is distributed using a pre-set key method, with a key length and block size of 256 bits. During the configuration phase, the station needs to configure the remote end's SMS receiving number and communication password.

[0039] The communication message between the station and the remote end includes the following parts.

[0040] (1) Command word: Determines the type of message and the action to be performed.

[0041] (2) Timestamp: Determines the time when the message was sent, adds a variable to the message, ensures that the encrypted messages are different when the same command is sent multiple times, and prevents replay attacks.

[0042] (3) Verification: Determine the correctness of the message. If you receive a text message that is not a control command, the data will definitely fail the verification after decryption through the encryption algorithm.

[0043] To ensure messages are transmitted as text via SMS, after encryption, they need to be base64 encoded into a displayable string. The overall length of the encoded message must be kept under 68 characters to guarantee it can be sent within the length of a single SMS message.

[0044] There are generally two ways to send SMS messages: 1. Send directly through the terminal; 2. Send by calling the SMS platform interface. This application does not limit itself to any particular method of sending SMS messages.

[0045] After receiving the SMS, the remote station needs to first perform base64 decoding, then SM4 decryption, calculate the verification after decryption, and if the verification is successful, check the timestamp. If the timestamp of the data packet differs too much from the local time, it may be a replay attack. If the time difference is within 5 minutes, it is considered a valid data packet, and the action represented by the command word is executed.

[0046] S3. Action Execution and Confirmation

[0047] Upon receiving the trip command, the remote end outputs a trip signal via a relay, causing the molded case switch to trip. After the trip signal is issued, the remote BSCC detects the action through the feedback contact on the circuit breaker. If the feedback contact opens (or closes), the trip is complete, a success status SMS is sent back to the substation, and a successful trip SMS is sent to the power bureau's management terminal (which can be a mobile phone, tablet, or a dedicated device). If the feedback contact does not activate, the above actions are repeated. After three repetitions, if there is still no activation, a trip failure status SMS is sent to the substation, and a trip failure message is sent to the power bureau's management terminal.

[0048] S4. Manually reclosing the circuit breaker after tripping.

[0049] If the remote BSCC receives a disconnect command but does not receive a reconnect command, it will periodically (5-10 seconds) issue a disconnect signal. If someone manually reconnects the circuit, the circuit will be periodically disconnected. If the remote BSCC receives a reconnect command and cancels the periodic disconnect signal, the circuit will not be disconnected after a successful manual reconnection.

[0050] The following steps are mainly for special cases:

[0051] S5. Manual circuit breaker tripping procedure

[0052] If the remote BSCC does not receive a trip signal and its power supply is normal, and the circuit breaker feedback contact opens (or closes), it can be determined that the trip was manual, or the monitoring circuit is considered damaged. Upon detecting this situation, the remote BSCC sends a text message to the power bureau's management terminal to inform them of the situation, and the power bureau's management terminal confirms the specific details.

[0053] This step is primarily used to address special circumstances and restore power to the office areas of dedicated line customers.

[0054] S6. Power Outage Handling

[0055] If the remote BSCC does not receive a power outage notification, and the remote BSCC detects an abnormal power supply and determines that it is in a power outage state, the remote BSCC, which has a supercapacitor inside, uses the stored power to send a power outage notification SMS to the power bureau's management terminal.

[0056] This step is done manually to ensure the power needs of dedicated line customers are met as much as possible.

[0057] S7. Destruction Detection

[0058] To confirm the circuit condition of the dedicated line customer, testing is required. The specific testing steps are as follows, and the status table of the test results is shown below. Figure 2 As shown:

[0059] (1) Damage to the circuit breaker control circuit

[0060] If the circuit breaker control loop of the remote BSCC is damaged, when a circuit breaker event occurs, the remote BSCC will detect that it cannot disconnect the molded case switch and send an alarm SMS to the power bureau's management terminal after three attempts.

[0061] (2) The monitoring circuit was damaged.

[0062] If the remote feedback contact status detection and control action do not match, but the remote BSCC itself is powered normally, the remote BSCC will send a text message to the power bureau's management terminal to inform that the circuit has been manually disconnected or the monitoring circuit has been damaged.

[0063] (3) The BSCC power supply circuit was damaged.

[0064] If the power supply circuit of the remote BSCC is damaged, the remote BSCC will detect the power supply abnormality. However, if the monitoring circuit detects that the line current (or voltage) is normal, it will send an SMS to the power bureau's management terminal to inform the BSCC of the power supply abnormality. If the monitoring circuit is also damaged, it may be a power outage. In this case, an alarm SMS will be sent to the management personnel to verify the power outage situation.

[0065] (4) BSCC Status Confirmation

[0066] BSCC status confirmation is divided into confirmation of the station-side BSCC and the remote BSCC, and confirmation of the BSCC with the power bureau's management terminal.

[0067] After each control command is sent, the remote BSCC returns the execution result to the station-side BSCC. If the station-side BSCC does not receive a feedback SMS from the remote BSCC within a timeout period, it assumes that the remote BSCC is out of contact and sends a remote BSCC out of contact SMS alarm to the power bureau's management terminal.

[0068] Because the remote BSCC has the ability to send its own abnormal status, if there is no need for the station-side BSCC and the remote BSCC to monitor each other in real time, heartbeats are not required. The remote BSCC can report abnormal statuses to the power bureau's management terminal on its own. The station-side BSCC only sends a failure receipt to the power bureau's management terminal when a command execution fails.

[0069] Mobile IoT provides a text messaging interface for IoT devices to corporate private network customers. Devices can use this interface to send text messages to designated terminals. The solution changes the original direct text message sending process to a method where, when text messaging is needed, the Mobile IoT platform's interface is called to send the message to the target device. The encryption and encoding processes of the existing solution are retained. Furthermore, when calling the Mobile IoT platform interface, an additional encryption and signature authentication is performed according to the interface requirements, so security is not compromised.

[0070] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for remotely classifying and managing workloads, characterized in that: The method includes the following steps: S1. After the marketing system sends a trip command to the dedicated transformer acquisition terminal, the dedicated transformer terminal activates the output control relay, and the power bureau's management terminal BSCC device obtains the trip signal through its own switch input interface; S2. The circuit breaker signal is transmitted via communication. The following steps are also required during the communication transmission process: (1) The circuit breaker signal is encrypted using the SM4 algorithm; (2) Encode the encrypted circuit breaker signal into a string and send it to the dedicated line user's station by calling the SMS platform interface; (3) After receiving the SMS, the station terminal of the dedicated line user first performs the decoding operation; (4) Perform the decryption operation; (5) Perform calculations and verifications on the decrypted signals; (6) Determine the time node; (7) Perform the circuit breaker tripping operation; S3. Execute and confirm the circuit breaker operation. The specific steps are as follows; (1) After receiving the circuit breaker signal at the station end of the dedicated line user, the circuit breaker is tripped by outputting the circuit breaker signal through the relay; (2) The station-side BSCC of the dedicated line user detects the action execution status through the feedback contact on the circuit breaker; (3) If the feedback contact is open or closed, the circuit breaker tripping is completed. The success information will be returned to the station of the dedicated line user via SMS and the successful tripping information will be sent to the management terminal of the power bureau. (4) If the feedback contact does not act, repeat the above actions. If there is still no action after repeating three times, send a text message indicating that the circuit breaker failed to trip to the station of the dedicated line user and send a text message indicating that the circuit breaker failed to trip to the management terminal of the power bureau. S4. Perform the closing procedure; S5. Destructive detection, including the following steps: (1) If the circuit breaker control loop of the remote BSCC is damaged, when a circuit breaker event occurs, the remote BSCC detects that it cannot disconnect the molded case switch and sends an alarm SMS to the power bureau's management terminal after three attempts. (2) If the remote feedback contact status detection and control action do not match, but the remote BSCC itself is powered normally at this time, the remote BSCC will determine that the manual circuit breaker is disconnected or the monitoring circuit is damaged, and send a text message to the power bureau's management terminal to notify it. (3) If the power supply circuit of the remote BSCC is damaged, the remote BSCC will detect the power supply abnormality. However, if the monitoring circuit detects that the line current or voltage is normal, the BSCC will send an SMS to the power bureau's management terminal to inform the management personnel of the power supply abnormality. If the monitoring circuit is also damaged, an alarm SMS will be sent to the management personnel.

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