High-precision multimode low-voltage load power property recording instrument and working method thereof

Abstract

The invention discloses a high-precision multimode low-voltage load power property recording instrument, which is low in cost and flexible in installation, is not confined to various measuring interfaces, and can realize networked synchronous precise time service, high measurement precision and three-mode transmission, and the working method thereof. The high-precision multimode low-voltage load power property recording instrument comprises a microprocessor unit, wherein the microprocessor unit acquires a power grid simulating signal from a low voltage side power grid through a signal regulation and analog-digital conversion processing unit, computes and analyses the voltage, the current, the frequency, the active power, the passive power and the power factor of a power grid low voltage side phasor signal, acquires a GPS (global positioning system) or a Beidou navigation signal through a double-mode time service unit to obtain time information, integrates the time information with the voltage, the current, the frequency, the active power, the passive power and the power factor which are computed out to obtain a time sequence power grid vector, and sends data to a server terminal through a three-mode data sending unit; and the microprocessor unit also acquires a power voltage from the low voltage side power grid through a power unit and is connected with a liquid crystal display unit and a control unit.

Description

technical field [0001] The invention belongs to the technical field of power grid measurement, and specifically relates to a high-precision multi-mode low-voltage load power characteristic recorder with centralized GPS precise time service, high-frequency sampling, high-precision measurement, and three-mode summary transmission and a working method thereof. Background technique [0002] At present, with the introduction of smart grid planning and related standards and the completion of some pilot projects, China's smart grid market will usher in a blowout development. An important link is the update of measuring instruments. And the entire power grid industry is actively promoting the implementation of ladder electricity prices and time-of-use electricity prices, and the measuring synchronous power meters will enter a new stage of development, innovation and improvement in the future. [0003] The power measurement devices currently on the market have the following characte...

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Problems solved by technology

[0004] (1) Most of them are real-time power display, which is used to check the power of electrical equipment. The measured data cannot be transmitted through the network, which is not convenient for system utilization;

[0005] (2) An individual power measurement device can realize single data network transmission and send the data to the terminal for display, but because there is no accurate synchronization and timing module, it cannot realize the data synchronization of multi-site measurements, and cannot centralize the data measured by instruments in different locations Systems are consolidated, making it impossible to analyze power load characteristics

That is to say, due to the limitations of complex installation, high cost, and the fact that this system is mainly installed on a few key nodes of the power grid, it can only display the load power distribution in a large area in the dispatching department of the power center, and cannot display the low-voltage Centralized

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