Shanghai Jiao Tong University

Beijing Didi Infinity Technology and Development Co., Ltd.

Bei Han

Xiuchen Jiang

Guojie Li

Lin Feng

Keyou Wang

Lijun Hang

Jin Xu

Xin Huang

Lingyu Zhang

Licai Qi

A system includes a storage device storing a set of instructions and at least one processor in communication with the storage device. When executing the instructions, the at least one processor is configured to obtain, via a network, rule information for rules for determining alert from a rule library and obtain, via the network, operation data of the on-demand service from a storage medium. The at least one processor may also cause the system to determine whether the operation data is in accordance with the rules for determining alert based on the rule information and determine an alert based on the determination that the operation data is in accordance with the rules for determining alert. The at least one processor may further cause the system to and transmit the alert to be displayed to managers of the on-demand service.

Systems and methods for cheat examination

Nonlinear control method for the micro-grid inverter with anti-disturbance. By generating reference currents that satisfy specific active and reactive power command under various working conditions, and introducing a nonlinear control method based on Lyapunov function to control the inverter, fast and accurate tracking of the generated reference signals is realized. The method realizes effective decoupling control of active power and reactive power. The system has high dynamic response and good robustness. Besides, the control structure of the method is simple and easy to implement, and the synchronous control link and the additional voltage and current regulator are omitted. The method realizes fast and accurate power exchange and stable power transmission between the inverter and the grid in the micro-grid under various working conditions, and provides a guarantee for improving the energy management efficiency within the micro-grid.

Nonlinear control method for micro-grid inverter with anti-disturbance

A feedforward voltage series compensator based on complimentary use of wind, solar, and electric power comprising a controller, a rectifier unit, an H bridge inverter, a series transformer, a wind-power DC voltage sensor, a wind-power DC current sensor, an AC voltage transducer, a DC boost unit, a PV DC voltage sensor, a PV DC current sensor, and a grid-connected inverter. The compensator makes use of wind-electric and photovoltaic-electric complimentary interactions to solve the traditional energy issue for series compensator, and as the grid-connected inverter is feedforward, there is extra capacity for the series transformer and the series complimentary inverter unit, and hence it enjoys the feedforward and quick voltage complimentary characteristics of the wind and solar power generation.

Feedforward voltage series compensator based on complementary use of wind power and photovoltaic power

A method for designing cascaded multi-level inverters with minimization of large-scale voltage distortion, based on KKT (Karush-Kuhn-Tucker) conditions and with simplified computation of conduction angles, simplifies the computation process, and is conducive to on-line calculation. Meanwhile, its fundamental voltage is adaptive, minimization of total harmonic is realized for cascaded multi-level inverters at high-voltage, and voltage power quality at grid connected nodes is improved.

Method for designing cascaded multi-level inverter with minimized large-scale voltage distortion

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Shanghai, China

Bei Han