Grid-Connected Inverter with Harmonic Compensation for Distributed Power System

2013 ◽  
Vol 313-314 ◽  
pp. 804-808
Author(s):  
Li Wang ◽  
Wen Xin Huang ◽  
Fei Fei Bu ◽  
Ying Hu
Keyword(s):  
Power System ◽  
Control Strategy ◽  
Reactive Power ◽  
Utilization Efficiency ◽  
Harmonic Compensation ◽  
Distributed Power ◽  
Grid Connection ◽  
Harmonic Pollution ◽  
Distributed Power System ◽  
Grid Connected Inverter

To solve the problem of harmonic pollution in distributed power system, a new type of grid-connected inverter with harmonic compensation is studied in this paper. This system adopts a unified control strategy with decoupled active and reactive power based on grid voltage orientation. Both the grid connection and harmonic compensation are realized together in one inverter, which improves the inverter’s utilization efficiency and protects the power grid from harmonic pollution. The simulation and experimental results are shown to prove the correctness of the control strategy.

scholarly journals Active Synchronous Control Strategy of Distributed Power Grid Connection Based on Mobile Network

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Liu Zhang ◽  
Shaohua Ma ◽  
Yangyang Ge ◽  
Cailian Gu ◽  
Hao Wang
Keyword(s):  
Power System ◽  
Control Strategy ◽  
Control Method ◽  
Power Grid ◽  
Mobile Network ◽  
Large Power ◽  
Distributed Power ◽  
Synchronous Control ◽  
Grid Connection ◽  
Distributed Power System

This paper presents an active synchronous control scheme for distributed power grid connection based on the mobile network. This scheme avoids the disadvantages of the traditional control method, such as long waiting time and low reliability, and can meet the requirements of “the hotplug online” distributed power grid connection. The scheme uses the mobile network to collect and detect voltage slip information between the distributed power system and large power grid before operation. When the voltage slip cannot meet the requirements of grid connection, the side voltage information of the distributed power system is actively regulated. The amplitude difference and phase difference signals are, respectively, adjusted by PI, and the generated adjustment signals are, respectively, sent to the corresponding controllers through the mobile network with different weight coefficients. After the receiver receives the regulated signal, it changes the amplitude and frequency of its output voltage by shifting the pendent characteristic curve, so as to realize the distributed power system side voltage and the large power grid side voltage eventually. Finally, simulation analysis and experiments are used to verify the effectiveness and practicability of the active synchronous control strategy.

Research on User-Side Distributed Power System Control Strategy

2014 ◽  
Vol 875-877 ◽  
pp. 1881-1887
Author(s):  
Ming Ming Pan ◽  
Shi Ming Tian
Keyword(s):  
Power System ◽  
Control Strategy ◽  
Operation Mode ◽  
System Control ◽  
Distributed Power ◽  
Power System Control ◽  
Remote Areas ◽  
Distributed Power System ◽  
Switching Control Strategy ◽  
And Control

Distributed power system, especially the distributed power and micro-grid system in the mountain villages, islands and remote areas, has many advantages, which can be used as an effective supplement of grid to help solve the problem of electricity supply. The connected-grid inverter needs to be able to work in both grid mode and island operation mode in order to ensure the safety of the local critical load. The paper proposed the seamless switching control strategy for two modes of switching. The experimental results verify the property of the topology structure and control strategy.

Research on the Control of Distributed Power Grid-Connected Inverter

2014 ◽  
Vol 654 ◽  
pp. 238-241
Author(s):  
Jian Tang ◽  
Yue Nan Zeng ◽  
Bin Zhou ◽  
Jin Hui Liu
Keyword(s):  
Control Strategy ◽  
Reactive Power ◽  
Power Grid ◽  
Dynamic Performance ◽  
Current Loop ◽  
Two Phase ◽  
Voltage Space Vector ◽  
Distributed Power ◽  
Loop Control ◽  
Grid Connected Inverter

Based on voltage space vector modulation, a distributed power grid-connected inverter (DPGCI) utilizing double loop control strategy is researched, the system is able to feedback power to grid with constant power and unity power factor. the static and dynamic performance is good. Firstly, a mathematical model of inverter system in two-phase synchronous rotating coordinate is built, based on this, a outer power loop and inner current loop control strategy is proposed, realizing the independent control of active and reactive power. Experimental results show the correctness and validity of the control strategy.

Research on Flexible Grid-Connection Control Strategy of Distributed Power in New Energy Micro-Grid

2013 ◽  
Vol 433-435 ◽  
pp. 1263-1270
Author(s):  
Guo Wen Hu ◽  
Lin Wang ◽  
Yin Jie Wang
Keyword(s):  
Control Strategy ◽  
Reactive Power ◽  
Control Method ◽  
Balance Of Power ◽  
Distributed Power ◽  
Flexible Control ◽  
Grid Connection ◽  
Micro Grid ◽  
The Impact ◽  
Flexible Grid

Abstract: The point of the micro-grid distributed power's control is grid-connected inverter. The flexible grid-connection control technology provided an optimizing control method between distributed power and micro-grid and between micro-grid and power system. The flexible grid-connection control strategy includes flexible grid-connection control and flexible islanding control. The flexible grid-connection control achieves the good performance by means of regulation of the active and reactive power of micro-grid, while inhibiting the impact of impulse current, smooth power output, forecasting load and micro-grid power capacity. Based on the flexible grid-connection technology research of distributed power in micro-grid, the flexible master-slave method was presented based on PQ control, and the balance of power and the flexible control in micro-grid has been reached by it. The emulation and experiment results verify that the flexible master-slave method is effective; the balance of power, the flexible control when micro-grid is in islanding mode has been reached; the feasibility of the flexible master-slave method to stabilize the system was showed.

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