In order to ensure power system stability, modern wind turbines are required to be able to endure deep voltage dips. The specifications that determine the voltage dip versus time are called fault r/de-through （FRT） ...In order to ensure power system stability, modern wind turbines are required to be able to endure deep voltage dips. The specifications that determine the voltage dip versus time are called fault r/de-through （FRT） requirements. The purpose of this paper is not only to examine the FRT behavior of a full-power converter wind turbine but also to combine the power system viewpoint to the studies. It is not enough for the turbine to be FRT capable; the loss of mains （LOM） protection of the turbine must also be set to allow the FRT. Enabling FRT, however, means that the LOM protection settings must be loosen, which may sometimes pose a safety hazard. This article introduces unique real-time simulation environment and proposes an FRT method for a wind turbine that also takes the operation of LOM protection relay into account. Simulations are carried out using the simulation environment and results show that wind turbine is able to ride-through a symmetrical power system fault.展开更多
An investigation was conducted to install wind farm to supply electrical power to the village of Ras Munif, the highest elevation in Jordan. The village installed capacity load was found to be 500 kW. A 25 windmills, ...An investigation was conducted to install wind farm to supply electrical power to the village of Ras Munif, the highest elevation in Jordan. The village installed capacity load was found to be 500 kW. A 25 windmills, 20 kW each, forming the wind farm was found to be the best choice to supply the village with 100% of its needed power. The windmills will be spaced 50 meters along an unobstructed continuous wind flow location, along sloping sides of Ras Munif Mountain, alongside service road. The village load bus will be connected directly to both the output of wind farm inverter output bus and to the national grid bus. Both buses supply the needed power. The power flow was found to be supplied by the wind farm, except when the wind speed is low, the village load will be supplied partially or totally by the national grid bus.展开更多
In the present research work, the pitch-control is carried out such that the rotor blades are rotated around their longitudinal axis while the rotor continues its normal rotation. It is really a challenge to produce a...In the present research work, the pitch-control is carried out such that the rotor blades are rotated around their longitudinal axis while the rotor continues its normal rotation. It is really a challenge to produce a clever design to pitch the rotor blades by the optimal amount so as to maximize the power output at all wind speeds. The mechanism is implemented to a three-blade, horizontal-axis, home-scale wind turbine. The mechanism is powered by a suitable DC （direct-current） motor. The tests were carried out in the open section of a delivery wind tunnel. The air speed was measured by a suitable anemometer. The corresponding rotational speed （rpm） and output voltage at different wind speeds were measured and recorded for calibration of the control system. The mechanism proved to be successful in controlling the pitch angle over a wide range of wind speeds.展开更多
文摘In order to ensure power system stability, modern wind turbines are required to be able to endure deep voltage dips. The specifications that determine the voltage dip versus time are called fault r/de-through （FRT） requirements. The purpose of this paper is not only to examine the FRT behavior of a full-power converter wind turbine but also to combine the power system viewpoint to the studies. It is not enough for the turbine to be FRT capable; the loss of mains （LOM） protection of the turbine must also be set to allow the FRT. Enabling FRT, however, means that the LOM protection settings must be loosen, which may sometimes pose a safety hazard. This article introduces unique real-time simulation environment and proposes an FRT method for a wind turbine that also takes the operation of LOM protection relay into account. Simulations are carried out using the simulation environment and results show that wind turbine is able to ride-through a symmetrical power system fault.
文摘An investigation was conducted to install wind farm to supply electrical power to the village of Ras Munif, the highest elevation in Jordan. The village installed capacity load was found to be 500 kW. A 25 windmills, 20 kW each, forming the wind farm was found to be the best choice to supply the village with 100% of its needed power. The windmills will be spaced 50 meters along an unobstructed continuous wind flow location, along sloping sides of Ras Munif Mountain, alongside service road. The village load bus will be connected directly to both the output of wind farm inverter output bus and to the national grid bus. Both buses supply the needed power. The power flow was found to be supplied by the wind farm, except when the wind speed is low, the village load will be supplied partially or totally by the national grid bus.
文摘In the present research work, the pitch-control is carried out such that the rotor blades are rotated around their longitudinal axis while the rotor continues its normal rotation. It is really a challenge to produce a clever design to pitch the rotor blades by the optimal amount so as to maximize the power output at all wind speeds. The mechanism is implemented to a three-blade, horizontal-axis, home-scale wind turbine. The mechanism is powered by a suitable DC （direct-current） motor. The tests were carried out in the open section of a delivery wind tunnel. The air speed was measured by a suitable anemometer. The corresponding rotational speed （rpm） and output voltage at different wind speeds were measured and recorded for calibration of the control system. The mechanism proved to be successful in controlling the pitch angle over a wide range of wind speeds.
