High-power energy feedback type power grid simulation device and its control method
A power grid simulation, high-power technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problems of serious energy consumption, low power output bandwidth, difficult heat dissipation, etc., and achieve high power factor effect
Active Publication Date: 2016-03-23
SUZHOU AIKE BORUI POWER SUPPLY TECH
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Problems solved by technology
This method consumes a lot of energy, and the heat dissipation is difficult to handle
When the power becomes larger, the output bandwidth of the power supply becomes lower, which cannot meet the customer's requirements for high dynamic response speed
Method used
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Embodiment 1
[0020] Embodiment one: see attached figure 1 shown. A high-power energy feedback type grid simulation device includes a PWM rectification part and a grid simulation part sharing a direct current bus.
[0021] The PWM rectification part includes an input filter unit connected to each phase of the grid, and a three-phase bridge rectifier unit connected to the filter unit and composed of fully-controlled devices. Wherein, the input filter unit includes input filter inductors L1, L2 and input filter capacitors C1-C3 connected to each phase of the grid, ie U, V, W. The three-phase bridge rectifier unit includes six fully-controlled devices Q1-Q6, and the six fully-controlled devices Q1-Q6 are connected in groups of two to three phases of the power grid. The fully controlled devices Q1-Q6 can be selected from MOSFETs or IGBTs. A smoothing buffer capacitor C4 is also connected to the DC side of the three-phase bridge rectifier unit in the rectification part of the PWM.
[0022] T...
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The invention relates to a high-power energy feedback type power grid analog device which comprises a PWM rectification part and a power grid analog part, and the PWM rectification part and the power grid analog part share the same direct-current bus; the PWM rectification part comprises an input filtering unit and a three-phase bridge rectification unit; the power grid analog part comprises three single-phase inverters, an output filtering unit and an isolation unit. A control method adopted in the high-power energy feedback type power grid analog device comprises the steps that a double closed loop control device provided with a phase-locked loop and composed of a voltage outer ring and an inductive current inner ring is adopted in the PWM rectification part to control the amplitude and waveform of currents and the voltage of the direct-current bus; a digital-analog hybrid three-loop control device comprising the inductive current instantaneous value, the voltage instantaneous value and the voltage effective value is adopted in the power grid analog part to control the amplitude and waveform of the voltage of an analog power grid. The high-power energy feedback type power grid analog device has high net side power factors, can feed energy back to the power grid, and breaks through the limits of low switching frequency and bandwidths.
Description
technical field [0001] The present invention relates to a high-power energy feedback type power grid simulation device and its control method, that is, an energy-saving high-power power grid simulation device capable of realizing any power grid waveform, that is, energy can be fed back to the power grid, and the control method adopted by the device method. Background technique [0002] Traditional grid simulators are usually low power and non-regenerative. When it is necessary to absorb the power fed back by the load, a high-power resistor is usually used to absorb energy. This method consumes a lot of energy, and heat dissipation is difficult to handle. When the power becomes larger, the output bandwidth of the power supply becomes lower, which cannot meet the customer's requirements for high dynamic response speed. Contents of the invention [0003] The purpose of the present invention is to provide a high power, high bandwidth and high dynamic response speed, energy ...
Claims
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IPC IPC(8): H02M5/44G01R31/00
Inventor 卢家林詹成江肖思波韩海港王昆
Owner SUZHOU AIKE BORUI POWER SUPPLY TECH