In order to ensure the safe and stable operation of the power grid and the economic and reliable operation, the new energy power generation should have the ability of automatically adapting to different working conditions of the power grid, and be able to automatically adjust the operating state according to the changes of the grid operating conditions to meet the measurable and controllable Adjustable requirements. (1) It can generate electricity according to the start command of grid dispatching agency. (2) It can shut down automatically according to the stop instruction of grid dispatching institution or electrical failure. (3) It should have active power regulation capability and control active power output according to the instructions of grid dispatching agency. (4) It should have reactive power regulation capability and participate in grid voltage regulation. (5) New-energy power plants such as wind farms and photovoltaic power stations should have certain low voltage ride-through capability. we have pure bronze flange and bi-metallic flange,we also produce nibco flange,the material is CC491K and CC499K,bronze flange,bi-metallic flange,nibco bronze flange,gunmetal flange bronze flange,bi-metallic flange,nibco bronze flange,gunmetal flange Taizhou Runde Company , https://www.smartfittings.com