摘要:
A compact transformer-power converter assembly includes: a transformer immersed in oil and a cooling fluid path through a power converter system for extracting heat from the power converter system and the oil.
摘要:
A technique is provided for operating a wind farm at increased rated power output. The technique includes sensing a plurality of operating parameters of the wind turbine generator, assessing the plurality of operating parameters with respect to respective design ratings for the operating parameters, and intermittently increasing a rated power output of the wind turbine generator based upon the assessment.
摘要:
An ARCP converter having a series circuit formed of at least four main switches per converter phase, which are connected electrically in parallel between DC voltage rails is described. A capacitance is connected in parallel with each individual main switch. Two intermediate-circuit capacitances are disposed between the DC voltage rails. A voltage neutral point of the capacitances is available for tapping. Junction points of adjacent main switches which do not form the output are connected to one another via variable-potential intermediate-circuit capacitances for forming commutation cells in a balanced manner with regard to the DC voltage rails. Each intermediate-circuit capacitance is formed of two capacitance elements, whose junction points are available as voltage neutral points, with the output of the converter phase connected to a resonant inductance, whose further connection is connected to all the voltage neutral points via a controllable bi-directional auxiliary switch.
摘要:
An auxiliary equipment system includes at least one auxiliary load bus configured to receive electric power having a voltage within a first voltage tolerance range. The auxiliary equipment system also includes at least one electric power supply conduit coupled to at least one electric power source. The electric power supply conduit is configured to transmit electric power having a voltage within a second voltage tolerance range. The second voltage tolerance range is greater than the first voltage tolerance range. The auxiliary equipment system further includes at least one controlled series transformer coupled to the auxiliary load bus and to the electric power supply conduit. The controlled series transformer is configured to receive electric power having a voltage within the second voltage tolerance range and transmit electric power having a voltage within the first voltage tolerance range.
摘要:
A protective circuit for a multi-level converter including a DC link capacitor bank includes: an energy absorbing element; switches, wherein at least two of the switches each couple the energy absorbing element to the capacitor bank; and a controller configured to provide control signals to the switches to selectively actuate the switches to enable control of energy dissipation and to enable control of voltage balance on the capacitor bank of the multi-level converter.
摘要:
A protective circuit for a multi-level converter including a DC link capacitor bank includes: an energy absorbing element; switches, wherein at least two of the switches each couple the energy absorbing element to the capacitor bank; and a controller configured to provide control signals to the switches to selectively actuate the switches to enable control of energy dissipation and to enable control of voltage balance on the capacitor bank of the multi-level converter.
摘要:
An apparatus for electric braking and system protection for an electric generator includes a dynamic brake and a crowbar circuit designed for cooperation with power converters to dump power upon command. The dynamic brake includes at least one resistor and the crowbar circuit includes another at least one resistor for dissipating power from the electric generator. Methods for use of the electric braking and system protection calls for shunting the power to at least one of the dynamic brake, the crowbar circuit and the generator side power converter.
摘要:
Systems and methods for a mobile power conditioning platform are disclosed. According to one embodiment of the invention, a mobile power conditioning platform is positioned proximate to a power grid, coupled to the power grid via an offboard power coupling, coupled to an onboard electrical system of a vehicle via a vehicle power coupling, and transfers electric power between the power grid and the onboard electrical system. One or more onboard generators of the vehicle may modify operation at least partly in response to the transfer of electric power.
摘要:
A method of controlling electrical power systems coupled to an electrical connection point includes obtaining carrier signals and fundamental waveforms from electrical power systems coupled to at least two renewable energy sources, generating pulse width modulation (PWM) signals using the carrier signals and the fundamental waveforms while interleaving carrier signals, fundamental waveforms, or a combination of carrier signals and fundamental waveforms of the electrical power systems, and driving grid side converters of the electrical power systems with the PWM signals.
摘要:
A power generation system comprises at least two electrical systems connected at an electrical connection point. Each electrical system comprises a power conversion system comprising a converter including a plurality of switches for converting direct current power into alternating current power. The power generation system comprises a control system including at least two pulse width modulation (PWM) modulators, each PWM modulator for obtaining a fundamental waveform and a carrier signal, using the fundamental and carrier signals to generate a PWM pattern, and for providing the PWM pattern to a respective converter for driving the switches of the respective converter. The control system is configured to interleave carrier signals, fundamental waveforms, or a combination of carrier signals and fundamental waveforms of the at least two electrical systems to generate interleaved PWM patterns respectively for the at least two converters.