It is near Jiuquan.
See below for data.
Wind farms, as a general rule require wind speeds of 4.5 metres per second or higher.
The best destination for something similar to Changma Daba is a steady availability of non-turbulent wind. An important factor of turbine siting is moreover access to local demand or transmission capaJiuquan.
During the planning stages the Changma Daba wind farm would’ve been checked and endorsed through wind measurements. However, Changma Daba wind farm would have needed more than just meteorological data and measurements.
Site info around Jiuquan is a major element in the ‘development’ final decision Local winds are frequently checked for a year or more, and detailed wind maps constructed before wind generators are set up.
Altitude would also have a part to performin a project like Changma Daba. This is due to drag The increase in velocity with altitude is most extraordinary close to the surface and is affected by geography, surface roughness, and upwind obstacles such as trees or buildings. Velocity grows with altitude and is also more pronounced near land and is changed by terrain, surface and obstacles.
Normally, the growth of wind speeds with escalating height follows a wind profile power law, which anticipates that wind speed rises proportionately to the seventh root of altitude. Doubling the elevation of a turbine, then, raises the expected wind speeds by 10%, and the estimated power by 34%.
The distance of 7x Rotor Diameter is placed between each turbine, ie they’re spaced out in order that they don’t affect one another. But this is not always the situation in hilly areas.
Individual turbines at Changma Daba are interlocked with a medium voltage (usually 34.5 kV) power collection system and communications network.
At a substation, this kind of medium-voltage electric energy is increased in voltage using a transformer for connection to the high voltage transmission system. Development of a land-based wind farm requires installing of the collector system and substation, and possibly access roads to every turbine site.
Facts about Changma Daba wind farm
- Name: Changma Daba
- Wind turbine Supplier: Mingyang Wind Power, Model: MY1.5se, Units: 33,
- Country: China
- State: Gansu
- City: Jiuquan
- Owner: China Energy Conservation and Environmental Protection Group