Roof photovoltaic power generation grid-connected control system

Abstract

The invention provides a roof photovoltaic power generation grid-connected control system. The system comprises photovoltaic arrays, photovoltaic inverters, a power control module and a power frequency modulation module. The photovoltaic arrays comprise arrays formed by micro photovoltaic generator sets arranged at the tops of adjacent buildings. Each photovoltaic array corresponds to one photovoltaic inverter. The photovoltaic inverters are used for converting direct current generated by the photovoltaic arrays into alternating current. The power frequency modulation module is connected withthe photovoltaic inverters. The active power output by the corresponding photovoltaic inverter is adjusted according to the primary frequency modulation instruction. The power control module is used for detecting and controlling the output power of a generator set. The roof photovoltaic power generation grid-connected control system has the advantages of quick response, adaptability to various conditions and reduction of system frequency fluctuation.

Description

technical field [0001] The invention relates to a rapid transit platform, in particular to a grid-connected control system for photovoltaic power generation on the roof. Background technique [0002] With the development and application of photovoltaic energy, more and more photovoltaic power plants appear. In sparsely populated areas such as deserts, grasslands and Gobi, photovoltaic power plants have great application space, but these places are far away from cities after all, and cities are the power supply The main destination of these plants is that the power obtained in remote areas is transmitted to the city and the loss is too high, which makes the efficiency of these power plants not good. [0003] On this basis, the micro-grid system in the city can be developed. The current trend is to install photovoltaic power generation modules on the top of the middle and high-rise buildings in the city. Since the available space in the urban concentration area is the roof and...

AI Technical Summary

Problems solved by technology

[0004] However, the current problem is that too many power generation components are connected to the grid, and control is a major problem. At present, planning is carried out according to the method of slicing, and certain adjacent buildings are controlled as a unit. With the help of the current micro The grid-connected technology is incorporated into the mains grid, and finally realizes the grid-connected operation of photovoltaic power generation

[0005] At present, there are many problems, one of which is: photovoltaic power generation modules are often configured to generate power at full power, and their power generation capacity should be developed as much as possible. This is no problem in a large-scale power plant environment, but in micro-grid control, it will Due to the large number and mismatched power, the inertia of the system is reduced, and the frequency regulation capability is insufficient, which threatens the safe operation of the power grid