As power grids continue to develop and an increasing number of new energy power stations are connected, the capacity and complexity of grids are constantly growing. The existing methods of power and voltage control, which relied on telephone communication and manual operations, are gradually becoming inadequate to meet the demand. Wind and PV power generation are subject to fluctuations, which can disrupt the real-time balance of power grids and compromise their safe operation, leading to a range of problems in power grid dispatch. Additionally, due to the small capacity of a single wind/PV power generation unit, generation units are great in number and highly dispersed, and it is difficult to control them manually. Therefore, connecting to the AVC control system can help maintain the overall stability of power grids with connected wind farms and PV stations, enhance the capacity for consuming power generated by wind and PV systems, and ensure that wind turbines and inverters operate stably without disconnecting from the grid.
The PRS-7000AVC control system, developed by CYG ET CO., LTD., is an automatic voltage control system. It calculates control strategies online based on real-time operation conditions of power grids, and the regulation objectives periodically issued by the dispatching master station or predetermined local regulation objectives. The system automatically controls reactive power and voltage regulation equipment in a closed loop, realizing a reasonable distribution of reactive power and voltage, maintaining the power system voltage within the allowable error range. The system helps achieve safe, stable, and cost-effective operation of power grids.