摘要:
An electrical generation system comprising a generator. The generator including, a stator portion, and a rotor portion, and a variable frequency generator (VFG) exciter. The VFG exciter including, a first converter, operative to convert DC current to AC current connected to a DC link and a second converter, operative to convert DC current to AC current connected to the DC link. The system including a first switch operative, when closed, to connect the first converter to the stator portion while the generator is operating in a starting condition, wherein the first switch is open while the generator is operating in a running condition. The system including second switch operative, when closed, to connect the first converter and the second converter in parallel to the rotor portion while the generator is operating in a running condition, wherein the second switch is open while the generator is operating in the starting condition.
摘要:
A line angle shift logic controller for use with a power generation system coupled to an electrical grid is disclosed. The line angle shift controller includes a line angle shift controller configured to receive a phase locked loop (PLL) error signal representative of a difference between a phase angle of the power generation system and a phase angle of the electrical grid, receive a threshold phase from the electrical grid, and generate a PLL shift signal based at least partially on the PLL error signal and the threshold phase.
摘要:
A method and system are disclosed that enable the regulation of the temperature of transmission equipment connected to a generating plant. In one embodiment, a method includes obtaining a temperature of transmission equipment connected to a generating plant and regulating the output of the generating plant in response to the temperature exceeding a threshold level to reduce the temperature of the transmission equipment to below the threshold level.
摘要:
A torsional-mode damping system includes a torque sensor, a torsional damper connected to the torque sensor, a VFD controller connected to the torsional damper, and a VFD converter connected to the VFD controller, the VFD converter being configured to control an electric power supplied to the electric motor based on VFD signals generated by the VFD controller, the VFD signals being modified by a torque-correcting signal so as to dampen torsional vibrations at a natural frequency of a compression train.
摘要:
A method for controlling operation of a wind turbine included within a power generation and delivery system is described. The method includes measuring at least one operating condition of the power generation and delivery system. The method also includes transmitting, to a power limiter system, an operating condition feedback signal that corresponds to the operating condition. The method also includes analyzing the operating condition feedback signal to identify an occurrence of a grid contingency event and generating a real current command signal corresponding to an occurrence of a grid contingency event. The method also includes transmitting the real current command signal to a controller and applying the real current command signal to power converter performance to facilitate reducing pole-slipping. The method also includes storing, in a memory, at least one variable corresponding to the operating condition upon the occurrence of a grid contingency event.
摘要:
A method of operating a wind turbine includes energizing at least a portion of a power conversion assembly via an alternating current (AC) power source. The method also includes converting AC power to direct current (DC) power having a DC component and an AC component via the power conversion assembly. The method further includes transmitting the DC component and the AC component through a DC power transmission line. The method also includes separating the DC component from the AC component. The method further includes transmitting the AC component to at least one wind turbine electrical device.
摘要:
A method and system are disclosed that enable the regulation of the temperature of transmission equipment connected to a generating plant. In one embodiment, a method includes obtaining a temperature of transmission equipment connected to a generating plant and regulating the output of the generating plant in response to the temperature exceeding a threshold level to reduce the temperature of the transmission equipment to below the threshold level.
摘要:
In one aspect, a method for controlling a dual-fed induction generator (DFIG) during a high-voltage grid event is provided. The method includes setting, by a controller, an output of a closed-loop portion of a rotor current regulator to a fixed value such that a predictive feed-forward path sets an internal voltage for the DFIG; and detecting, by the controller, a condition of high dc voltage on a dc link or a condition predictive of high dc voltage on the dc link, and in response reduce a rotor torque producing current command to approximately zero, wherein the dc link connects a line-side converter connected to a system bus and a rotor-side converter connected to a rotor of the DFIG.
摘要:
A voltage control system for a wind turbine generator may include a reactive power regulator configured to control reactive power production by the wind turbine generator by adjusting a voltage setpoint for the generator. The reactive power regulator may have a first time constant and the voltage setpoint may be defined between an upper limit and a lower limit. The system may also include a voltage limit regulator configured to adjust at least one of the upper limit or the lower limit for the voltage setpoint based on a voltage-related parameter. In addition, the system may include a voltage regulator coupled to the reactive power regulator. The voltage regulator may be configured to control real power production by the wind turbine generator based on the voltage setpoint. The voltage regulator may have a second time constant, wherein the first time constant is numerically greater than the second time constant.
摘要:
A voltage control system for a wind turbine generator may include a reactive power regulator configured to control reactive power production by the wind turbine generator by adjusting a voltage setpoint for the generator. The reactive power regulator may have a first time constant and the voltage setpoint may be defined between an upper limit and a lower limit. The system may also include a voltage limit regulator configured to adjust at least one of the upper limit or the lower limit for the voltage setpoint based on a voltage-related parameter. In addition, the system may include a voltage regulator coupled to the reactive power regulator. The voltage regulator may be configured to control real power production by the wind turbine generator based on the voltage setpoint. The voltage regulator may have a second time constant, wherein the first time constant is numerically greater than the second time constant.