Online power quality monitoring device having energy management function

Abstract

The invention discloses an online power quality monitoring device having an energy management function. The online power quality monitoring device comprises a photovoltaic power detection device, a load power detection device, a battery state-of-charge detection device, a photovoltaic limit power setting device, a fault detection device, a charging and discharging power adjustment device, a communication device, a microprocessor, a power quality monitoring device, a control command generation device, an energy management function mode selection device, an energy management function mode setting device, a touch display screen, a charge and discharge time setting device and a timing module. The communication device is connected with the photovoltaic power detection device, the load power detection device, the battery state-of-charge detection device, the fault detection device, the charging and discharging power adjustment device, the power quality monitoring device and the control command generation device. The online power quality monitoring device not only can realize power quality monitoring, but also can realize energy management, is simple in structure, reduces hardware cost and facilitates maintenance.

Description

technical field [0001] The invention relates to the technical field of power quality monitoring, in particular to an online power quality monitoring device with an energy management function. Background technique [0002] With the advancement of the times and the rapid development of science and technology, the access of large-scale power electronic equipment and a large number of distributed energy sources (such as wind power and solar power generation) has caused great changes in the grid structure and power consumption patterns. It will further deteriorate the power quality; in order to improve and improve the power quality, it is necessary to deeply understand and understand the power quality. Ensure the safe and economical operation of power grids and electrical equipment. [0003] The access of a large number of distributed energy sources (such as wind power and solar power generation) requires access to monitoring terminals for real-time monitoring in both photovolta...

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Problems solved by technology

[0003] The access of a large number of distributed energy sources (such as wind power and solar power generation) requires access to monitoring terminals for real-time monitoring in photovoltaic inverters and energy storage conversion systems, which increases hardware costs and makes system maintenance more difficult.

[0004] At present, there have been a lot of research on power quality monitoring equipment at home and abroad, but most of them are designed for traditional substations, without considering the access of a large number of distributed energy sources (photovoltaic power generation systems), so the monitoring of power quality It only monitors and collects data on its basic indicators (such as voltage, current, power, power factor, harmonic distortion rate, etc.), lacks the monitoring of the energy management function mode of distributed energy, and the use of too many monitoring equipment will further Increase cost and increase maintenance difficulty

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