With the increasing size of power grids, the updating of grid mode data has become a time-consuming and tedious task in grid analysis and calculation. Because of this, this paper develops an auxiliary software for updating grid mode data based on the PSD-BPA power system analysis software, intending to improve the efficiency of updating equipment parameters and regulating power flow convergence. The data is input in the first step to identify the zone that needs to be updated; the second step sorts and processes the data's massive amount of information; the third reads the processed data and calculates the old and new loads; the generator output is then automatically adjusted to improve the power flow convergence of the mode data, and the fourth step updates the calculation results into the original file to obtain the new power flow data. The fourth step is to update the calculation results into the original file to obtain new power flow data and complete the update of the operation mode data. The application results show that it is remarkable in shortening the calculation time, improving the efficiency of system analysis and reducing the probability of errors.
KEYWORDS: Power grids, Control systems, Power supplies, Switches, Switching, Capacitors, Photovoltaics, Fast packet switching, Design and modelling, Transformers
Urban power grid has a series of problems such as limited power supply capacity and insufficient reactive power reserve. Reasonable access to VSC-HVDC can effectively alleviate the above problems. In terms of reactive power control, VSC-HVDC can be incorporated into the traditional reactive power support system of regional urban power grids by taking advantage of the rapid, flexible and controllable dynamic reactive power transfer out of VSC-HVDC. Based on BPA simulation, this paper verifies the reactive power support effect of VSC-HVDC on the power grid in the case of flexible direct interconnection of urban power grid partitions and proposes an optimization method of urban power grid partition operation based on the adjustment of VSC-HVDC operation mode, which improves the stable operation level of power grid partitions on the basis of giving full play to the flexible direct reactive power support effect.
KEYWORDS: Control systems, Power supplies, Wind energy, Virtual reality, Frequency modulation, Telecommunications, Electromagnetism, System on a chip, Error analysis, Distributed computing
The converter of the distributed power supply is not similar to the damping component and rotational inertia of the conventional synchronous generator, which is not conducive to the stable operation of the power system.Virtual synchronous generator control technology simulates the same or similar external characteristics as the synchronous generator, which provides strong support for the stable operation of the power system. Considering the operation characteristics of the energy storage system, it proposes the virtual synchronous generator control method considering the energy storage operation characteristics. builds A simple AC microgrid simulation system is build, and the proposed control strategy verified.
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