Microgrid Voltage Perturbation Control System and Method
A technology of control system and voltage controller, applied in the field of microgrid, can solve the problems of difficult to optimize distribution, frequent fluctuation of voltage and reactive power, etc., and achieve the effect of suppressing voltage fluctuation and ensuring stable voltage operation.
Active Publication Date: 2019-09-06
STATE GRID CORP OF CHINA +2
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[0005] The embodiment of the present invention provides a micro-grid voltage perturbation control system to solve the technical problems of frequent voltage fluctuations and difficult optimal distribution of reactive power in the micro-grid in the prior art
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[0069] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.
[0070] In this example, a microgrid voltage perturbation control system is provided as figure 1 As shown, it includes: energy storage unit, converter unit, coordinate transformation and active power calculation unit, power controller, voltage controller, adaptive limiter, current controller, PWM generator, the following components Describe the functions of the units, the connection relationship between them and the signal flow direction;
[0071] 1) Energy storage unit for powering the microgrid;
[0072] 2) The converter unit is connected to the output terminal of the energy storage unit, an...
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The invention provides a microgrid voltage perturbation control system and method, wherein the system includes: an energy storage unit, a converter unit, a coordinate transformation and active power calculation unit, a power controller, a voltage controller, and an adaptive limiting unit. generator, current controller, PWM generator; adaptive limiter, used to limit the active current reference value output by the power controller and the reactive current reference value output by the voltage controller, and output the active reference current and reactive power Reference current; PWM generator, used to PWM modulate the voltage control signal to generate a PWM waveform, which is input to the converter unit. The invention solves the technical problems of frequent voltage fluctuations and difficulty in optimal distribution of reactive power in microgrids in the prior art, and achieves the technical effect of effectively suppressing voltage fluctuations in microgrids and ensuring stable voltage operation.
Description
technical field [0001] The invention relates to the technical field of micro-grids, in particular to a micro-grid voltage perturbation control system and method. Background technique [0002] In recent years, with the rapid development of micro-grids, micro-grids formed by wind power and solar power have gradually become the mainstream of new energy power supply. Due to the randomness, volatility and intermittent characteristics of wind power and photovoltaic power generation, the voltage in the microgrid formed by wind power generation often fluctuates frequently, causing voltage perturbation, which seriously affects the voltage stability of the microgrid. In order to solve the above problems, a large-scale energy storage device is connected to the microgrid to stabilize the voltage and frequency in the microgrid. Through the introduction of large-scale energy storage technology, the operation characteristics of intermittent power supply can be effectively improved in real...
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IPC IPC(8): H02J3/12
Inventor 刘辉高文忠吴林林闫世杰崔正湃王靖然王皓靖
Owner STATE GRID CORP OF CHINA