Current source inverter mixed H2/ H-infinity optimal guaranteed cost control method

A technology of current source type and control method, applied in the direction of converting AC power input to DC power output, electrical components, output power conversion devices, etc., can solve inductance parameter uncertainty and voltage disturbance, difficult power grid, and difficult control parameters adjustment and other issues
CN106301049AActive Publication Date: 2017-01-04SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
Publication Date
2017-01-04

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Abstract

The invention relates to a current source inverter mixed H2 / H-infinity optimal guaranteed cost control method. The method comprises the following steps: establishing a current source inverter state equation model and carrying out discretization thereon; carrying out extension on the discretized current source inverter state equation model to obtain an error augmented state equation model; obtaining a full state feedback control rate through the mixed H2 / H-infinity optimal guaranteed cost control method; and substituting the state feedback control rate into an inverter servo control closed-loop system to realize mixed H2 / H-infinity optimal guaranteed cost control. The method has better dynamic and static performance compared with a conventional proportional integral (PI) or proportional resonant(PR) control scheme, and has robustness in grid inductance fluctuation.
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Description

technical field

[0001] The invention relates to a current source inverter hybrid H 2 / H ∞ The invention provides an optimal guaranteed cost control method, which belongs to the technical field of smart grid. Background technique

[0002] In the context of the current smart grid, distributed generators and energy storage systems driven by a variety of renewable energy sources (such as photovoltaics, fuel cells, and wind energy) are emerging as new technologies. The three-phase pulse width modulation (PWM) current source inverter plays an important role in connecting the above-mentioned distributed generation equipment with the large power grid.

[0003] For current source inverters, a well-designed controller is required to maintain the desired state (a typical servo tracking problem) to ensure the stability and reliability of the AC and DC systems. But the AC side and DC side of the system have a certain degree of uncertainty and volatility. For example, the inductance p...

Claims

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