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Micro-grid multi-objective optimized operation control method

A multi-objective optimization and operation control technology, applied in the direction of single-net parallel feeding arrangement, electrical components, circuit devices, etc., can solve the problem of not clearly proposing the micro-grid optimal operation index function micro-grid optimal operation control method, lack of theoretical analysis and Guidance and other issues

Active Publication Date: 2014-12-10
SHANDONG UNIV
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Problems solved by technology

[0008] "Automation of Power Systems", 2010, 34(22): 97-102, "Dynamic Modeling and Analysis of Small Signal Stability of Inverted Distributed Power Grids" and "Automation of Power Systems", 2011, 35(6): In 76-80, "Small Signal Stability Analysis of Inverted Distributed Power Grid-connected Micro-grid" establishes a complete micro-grid small-signal dynamic model, which can analyze the influence of control parameters on the dynamic performance and steady-state characteristics of the micro-grid, but there is no Apply the analysis results to the operation control of the microgrid
[0009] In short, the microgrid operation control in the current research, especially for the microgrid including wind-solar hybrid and cogeneration, has not clearly proposed the index function of the microgrid optimal operation and the control method of the microgrid optimal operation, and lacks the theory Analysis and Guidance

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Embodiment Construction

[0054] The present invention will be further described below in conjunction with accompanying drawings and examples.

[0055] The distributed power unit structure and control system in the microgrid are as follows: figure 2 shown. Between the inverter unit and the load by the inductance L 1 , L 2 and capacitor C, resistor R f composed of the LCL filter, and the capacitor voltage of the LCL filter V C and inductor current i l1 Incorporated into the voltage and current double closed-loop control of the inverter. The input of the power controller is the instantaneous output power of the distributed power supply, and the reference voltage of the closed-loop control is output according to the droop characteristic. The droop control method only needs to detect the output of the inverter itself, and control the active and reactive power output by the inverter by adjusting the frequency and amplitude of its own output voltage, so as to realize the power sharing and stability of ...

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Abstract

The invention discloses a micro-grid multi-objective optimized operation control method, which comprises the steps of: constructing a micro-grid operation indicator function aiming at wind-light complementary and cold, heat and electricity combined supply micro-grid; then constructing a complete small signal model of the micro-grid for theoretical analysis to provide theoretical guidance for the multi-objective optimized operation control of the micro-grid; and finally on the basis of a multi-objective intelligent optimization theory, comprehensively using power system computer aided design (PSCAD) / electromagnetic transients including direct current (EMTDC) and MATLAB software to design the micro-grid multi-objective optimized operation control method, so as to enable the micro-grid to realize comprehensive optimization of multiple operation indicators such as economy, cleanness, reliability, stability, dynamic performance and the like in different operation modes such as a synchronized operation mode, a mode capable of being switched between the synchronized operation mode and an independent operation mode, an independent operation mode with sudden load change and a resynchronized operation mode.

Description

technical field [0001] The invention relates to the fields of distributed power generation and smart grid control, in particular to a multi-objective optimal operation control method for a micro grid. Background technique [0002] In recent years, with people's increasing attention to energy and environmental issues and the continuous improvement of users' requirements for power supply quality, microgrid is a new energy transmission mode and organization that increases the penetration rate of renewable energy and distributed energy in the energy supply system. form, can give full play to the technical, economic and environmental benefits brought by Distributed Generation (DG) to the power system and users, further improve the flexibility, economy and cleanliness of power system operation, and better meet the needs of power Users' requirements for power quality, power supply reliability and safety can also be met by cooling, heating and power cogeneration to meet the requirem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02J3/38
Inventor 张承慧王瑞琪李珂陈阿莲杜春水
Owner SHANDONG UNIV
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