Wireless electrical sensor and electrical parameter measurement and calculation apparatus, method and system

A wireless current sensor, comprising:

• a current acquirer configured to acquire a current signal;
• a second analog-to-digital converter configured to convert an analog current signal acquired by the current acquirer into a digital current signal;
• and
• a second wireless communication device configured to receive the acquired current signal and transmit the acquired current signal to an electrical parameter measurement and calculation apparatus in a wireless manner, so that the electrical parameter measurement and calculation apparatus calculates electrical parameter information according to the current signal and a voltage signal acquired by itself;
• wherein the second analog-to-digital converter receives a time signal of the second wireless communication device, and the second wireless communication device ensures signal sampling time synchronization of the current signal by:
• GNSS timing;
• 5G timing;
• sending local clock information to an opposite first wireless communication device by the second wireless communication device;
• or
• receiving local clock information from an opposite first wireless communication device by the second wireless communication device;
• wherein the local clock information comprises a series of pulses and/or timestamps, the pulses are used for controlling sampling of the second analog-to-digital converter, and the timestamps are used for expressing information related to a local clock, so as to achieve correct clock synchronization with an opposite end.

An electrical parameter measurement and calculation system, comprising an electrical parameter measurement and calculation apparatus comprising a voltage acquirer, a first wireless communication device, and an electrical parameter calculator integrated together, wherein the first wireless communication device receives a current signal from a wireless current sensor in a wireless manner and transmits the current signal to the electrical parameter calculator, wherein the wireless current sensor transmits the current signal to the electrical parameter measurement and calculation apparatus in a wireless manner;

• the voltage acquirer acquires a voltage signal and transmits the voltage signal to the electrical parameter calculator;
• and
• the electrical parameter calculator calculates electrical parameter information according to the current signal and the voltage signal;
• and
• the apparatus further comprises a first analog-to-digital converter configured to convert an analog voltage signal acquired by the voltage acquirer into a digital voltage signal;
• and a wireless current sensor comprising a current acquirer configured to acquire a current signal;
• a second analog-to-digital converter configured to convert an analog current signal acquired by the current acquirer into a digital current signal;
• and
• a second wireless communication device configured to receive the acquired current signal and transmit the acquired current signal to the electrical parameter measurement and calculation apparatus in a wireless manner, so that the electrical parameter measurement and calculation apparatus calculates electrical parameter information according to the current signal and a voltage signal acquired by itself;
• wherein the first wireless communication device and the second wireless communication device ensure signal sampling time synchronization of the current signal and the voltage signal by:
• GNSS timing;
• 5G timing;
• sending local clock information to the second wireless communication device by the first wireless communication device;
• or
• receiving local clock information from the second wireless communication device by the first wireless communication device;
• wherein the local clock information comprises a series of pulses and/or timestamps, the pulses are used for controlling sampling of the first analog-to-digital converter and the second analog-to-digital converter, and the timestamps are used for expressing information related to a local clock, so as to achieve correct clock synchronization with an opposite end.