CN-121984117-A - Wireless synchronization grid-connected system based on Beidou time service and grid-connected method thereof

CN121984117ACN 121984117 ACN121984117 ACN 121984117ACN-121984117-A

Abstract

The invention relates to a wireless synchronization grid-connected system based on Beidou time service and a grid-connected method thereof, wherein the system comprises a grid-side acquisition unit, a vehicle-side control unit, a low-voltage power generation vehicle and a vehicle-side grid-connected switch, wherein the grid-side acquisition unit is configured to acquire a mains supply side electric parameter at a synchronous sampling time before grid connection and acquire a time stamp of the sampling time through Beidou satellite time service; the method comprises the steps of wirelessly sending a mains supply side electric parameter carrying a time stamp to a vehicle side control unit, wherein the vehicle side control unit is configured to receive the mains supply side electric parameter carrying the time stamp and calculate transmission delay according to the time stamp, predict a closing time according to the mains supply side electric parameter and the transmission delay and generate a grid-connected instruction, and the vehicle side grid-connected switch is configured to execute a closing operation according to the received grid-connected instruction. According to the invention, through the combination of wireless transmission and Beidou time service, the accuracy and safety of the secondary grid connection are improved, and the distance limitation of the secondary grid connection is broken through.

Inventors

XIA TIAN
LUO YONGJUN

Assignees

武汉里得电力科技股份有限公司

Dates

Publication Date: 20260505
Application Date: 20251231

Claims (10)

1. The wireless synchronization grid-connected system based on Beidou time service comprises a grid-side acquisition unit, a vehicle-side control unit, a low-voltage power generation vehicle and a vehicle-side grid-connected switch, and is characterized in that, The grid-side acquisition unit is arranged at a grid-connected point and is configured to acquire a mains-side electrical parameter at a synchronous sampling time before grid connection, acquire a time stamp of the sampling time through Beidou satellite time service, wirelessly send the mains-side electrical parameter carrying the time stamp to the vehicle-side control unit, receive a grid-connected instruction issued by the vehicle-side control unit and wirelessly forward the grid-connected instruction to the vehicle-side grid-connected switch; The vehicle side control unit is arranged at the low-voltage power generation vehicle and is configured to receive a mains side electric parameter carrying a time stamp and calculate transmission delay according to the time stamp, determine a grid-connected parameter of the low-voltage power generation vehicle side according to the mains side electric parameter and the transmission delay, predict a switching-on time to generate a grid-connected instruction according to the mains side electric parameter, the transmission delay and the grid-connected parameter, and wirelessly transmit the grid-connected instruction to the grid-side acquisition unit; The vehicle-side grid-connected switch is configured to execute a switching-on operation according to the received grid-connected instruction.
2. The wireless synchronization grid-connected system based on Beidou time service according to claim 1, wherein the grid-side acquisition unit comprises: the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring electric parameters of a mains supply side at synchronous sampling time before grid connection, wherein the electric parameters comprise voltage, frequency and phase; the first satellite time service module is used for acquiring the time stamp of the sampling time through Beidou satellite time service; The system comprises a vehicle-side control unit, a first wireless transmission module and a vehicle-side grid-connected switch, wherein the vehicle-side control unit is used for controlling the vehicle-side power supply to carry the time stamp, the first wireless transmission module is used for wirelessly transmitting the commercial power side power parameter carrying the time stamp to the vehicle-side control unit, receiving the grid-connected instruction issued by the vehicle-side control unit and wirelessly forwarding the grid-connected instruction to the vehicle-side grid-connected switch.
3. The wireless synchronization grid-connected system based on Beidou time service according to claim 1, wherein the vehicle-side control unit comprises: the second wireless transmission module is used for receiving the mains supply side electrical parameter carrying the first timestamp and wirelessly transmitting the grid-connected instruction to the grid side acquisition unit; The second satellite time service module is used for acquiring a second time stamp of the time for receiving the electric parameter through Beidou satellite time service; the calculating module is used for calculating the transmission delay based on the first timestamp and the second timestamp; The prediction generation module is used for determining grid-connected parameters of the low-voltage power generation vehicle side according to the mains supply side power parameters and the transmission delay, and predicting the switching-on time to generate a grid-connected instruction according to the mains supply side power parameters, the transmission delay and the grid-connected parameters.
4. The wireless synchronization grid-connected system based on Beidou time service according to claim 3, wherein the prediction generation module comprises: the determining module is used for determining grid-connected parameters of the low-voltage power generation vehicle side according to the electric parameters of the commercial power side and the transmission delay; And the prediction module is used for predicting closing time to generate a grid-connected instruction according to the mains supply side electrical parameter, the transmission delay and the grid-connected parameter.
5. The wireless synchronization grid-connected system based on Beidou time service according to claim 3, wherein the vehicle-side control unit further comprises: And the adjusting module is used for adjusting the voltage and the frequency of the power generation vehicle according to the electric parameters at the mains supply side and the electric parameters at the vehicle side.
6. The wireless synchronization grid-connected system based on Beidou time service according to claim 5, wherein the generation of the grid-connected instruction by predicting the closing time comprises: and determining the closing moment based on the sum of the transmission delay and the closing operation time executed by the vehicle-side grid-connected switch.
7. A grid-connected method of a wireless synchronization grid-connected system based on the Beidou time service of claim 1, comprising: The network side acquisition unit acquires the mains side electric parameters at the synchronous sampling time before grid connection, and acquires the time stamp of the sampling time through Beidou satellite time service; the system comprises a vehicle side control unit, a network side acquisition unit, a network side control unit and a network side control unit, wherein the vehicle side control unit receives a mains supply side electric parameter carrying a time stamp and calculates transmission delay according to the time stamp; the network side acquisition unit receives a grid-connected instruction issued by the vehicle side control unit and wirelessly forwards the grid-connected instruction to the vehicle side grid-connected switch; and the vehicle-side grid-connected switch executes a switching-on operation according to the received grid-connected instruction.
8. The method for grid connection of the Beidou time service wireless synchronization grid connection system according to claim 7, wherein the steps of receiving the mains side power parameter carrying the time stamp and calculating the transmission delay according to the time stamp include: receiving mains supply side electric parameters carrying a first time stamp and wirelessly transmitting a grid-connected instruction to a grid-side acquisition unit; acquiring a second time stamp of the moment of receiving the electric parameter through Beidou satellite time service; based on the first timestamp and the second timestamp, a transmission delay is calculated.
9. An electronic device comprising one or more processors and storage means for storing one or more programs that, when executed by the one or more processors, cause the one or more processors to implement the method of grid-tie for a Beidou time service based wireless synchronization grid-tie system of any one of claims 7 to 8.
10. A computer readable medium having stored thereon a computer program, wherein the computer program when executed by a processor implements the grid connection method of the beidou time service based wireless synchronous grid connection system as claimed in any one of claims 7 to 8.

Description

Wireless synchronization grid-connected system based on Beidou time service and grid-connected method thereof Technical Field The invention belongs to the technical field of wireless traffic and satellite navigation, and particularly relates to a wireless synchronization grid-connected system based on Beidou time service and a grid-connected method thereof. Background In recent years, with the continuous improvement of the requirements of the national power grid on the power supply reliability, the emergency power supply vehicle is increasingly widely applied to the power distribution network, and the uninterrupted maintenance work is also gradually an important mode of power operation and maintenance. However, the grid connection operation of the traditional medium-low voltage power generation vehicle is difficult to realize real uninterrupted maintenance due to the problems of long distance between grid connection points and operation positions, complex field environment, complex operation and the like, and the power supply reliability and the operation efficiency are seriously affected. Therefore, a wireless synchronization grid-connected technical scheme is generated. Disclosure of Invention In order to solve the problem that the grid-connected point is remote and the problem that the conventional medium-low voltage power generation vehicle grid-connected technology cannot be applied to realize uninterrupted operation due to complex field environment, the first aspect of the invention provides a wireless synchronous grid-connected system based on Beidou time service, which comprises a grid-side acquisition unit, a grid-side acquisition unit and a grid-side control unit, wherein the grid-side acquisition unit is arranged at the grid-connected point and is configured to acquire electric parameters of a mains supply side at synchronous sampling time before grid connection and acquire a time stamp of the sampling time through Beidou satellite time service; the method comprises the steps of wirelessly sending a commercial power side electric parameter carrying a time stamp to a vehicle side control unit, receiving a grid-connected instruction issued by the vehicle side control unit and wirelessly forwarding the grid-connected instruction to a vehicle side grid-connected switch, wherein the vehicle side control unit is arranged at a low-voltage power generation vehicle and is configured to receive the commercial power side electric parameter carrying the time stamp and calculate transmission delay according to the time stamp, determine the grid-connected parameter of the low-voltage power generation vehicle side according to the commercial power side electric parameter and the transmission delay, predict a grid-connected instruction according to the commercial power side electric parameter, the transmission delay and the grid-connected parameter, generate the grid-connected instruction according to a switching-on time, and wirelessly transmit the grid-connected instruction to a grid-side acquisition unit, and the vehicle side grid-connected switch is configured to execute switching-on operation according to the received grid-connected instruction. In some embodiments of the invention, the network side acquisition unit comprises an acquisition module, a first satellite time service module, a first wireless transmission module and a vehicle side control unit, wherein the acquisition module is used for acquiring mains supply side electric parameters at synchronous sampling time before grid connection, the electric parameters comprise voltage, frequency and phase, the first satellite time service module is used for acquiring a time stamp of the sampling time through Beidou satellite time service, the first wireless transmission module is used for wirelessly transmitting the mains supply side electric parameters carrying the time stamp to the vehicle side control unit, and receiving a grid connection instruction issued by the vehicle side control unit and wirelessly forwarding the grid connection instruction to the vehicle side grid connection switch. In some embodiments of the invention, the vehicle side control unit comprises a second wireless transmission module, a second satellite time service module, a calculation module and a prediction generation module, wherein the second wireless transmission module is used for receiving a mains supply side electric parameter carrying a first time stamp and wirelessly transmitting a grid-connected instruction to a network side acquisition unit, the second satellite time service module is used for obtaining a second time stamp of a moment of receiving the electric parameter through Beidou satellite time service, the calculation module is used for calculating transmission delay based on the first time stamp and the second time stamp, the prediction generation module is used for determining the grid-connected parameter of the low-voltage power generation vehicle side accordi