基于MESOGI的虚拟阻抗控制方案的设计和分析,以改善非线性负载的和共享
Abdelhammid Kherbachi1, Ahmed Bendib2, Aissa Chouder3
1Centre de Développement des Energies Renouvelables, CDER, Route de l'Observatoire, B.P. 62, 16340, Bouzaréah, Algiers, Algeria.
Scientific reports
|June 10, 2024
概括
这项研究引入了一种新的虚拟阻抗 (VI) 控制,使用多个增强的二级通用集成器 (MESOGI) 来改进具有非线性负载的微电网中的反应功率共享. MESOGI方法提高了对干扰的准确性和稳定性,确保了稳定的电网运行.
科学领域:
- 电气工程 电气工程
- 电力系统 电力系统
- 控制系统 控制系统
背景情况:
- 现有的虚拟阻抗 (VI) 方法在非线性负载下在微电网 (MG) 内的垂落控制电压源逆变器 (VSI) 中难以准确的反应功率共享.
- 测量中的不准确波估计和DC偏移会降低VI控制性能和系统稳定性.
- 需要强大的VI控制策略,能够有效处理波和DC偏移.
研究的目的:
- 提出和验证基于多个增强的二级通用集成器 (MESOGI) 的新型虚拟阻抗 (VI) 控制策略,以改善岛屿微电网的反应电力共享.
- 为了提高VI控制的稳定性,防止由非线性负载引起的电压扭曲和直流干扰.
- 为了确保垂落控制的VSI之间准确的和和反应功率共享.
主要方法:
- 实现一个虚拟阻抗 (VI) 控制方案,利用多重增强二阶通用集成器 (MESOGI) 进行准确的波和直流电阻抵消估计/拒绝.
- 导出MESOGI方案的数学模型和包括虚拟阻抗在内的等效输出阻抗.
- 使用数学建模,模拟和实验测试进行性能分析.
主要成果:
- 基于MESOGI的VI控制器准确地估计了当前方位元件,在选择的频率上没有DC偏移.
- 拟议的控制方案证明了对电压扭曲的稳定性和对直流干扰的免疫性.
- 在非线性负载条件下,在垂落控制的VSI之间实现了更好的反应和和功率共享.
结论:
- 基于MESOGI的虚拟阻抗控制有效地解决了现有VI方法在具有非线性负载的微电网中的局限性.
- 拟议的战略通过确保精确的电力共享来提高岛屿微电网的稳定性和性能.
- 模拟和实验结果验证了拟议的控制在改善在具有挑战性的操作条件下的反应功率共享方面的有效性.
更多相关视频
08:35Interactive and Visualized Online Experimentation System for Engineering Education and Research
Published on: November 24, 2021
2.4K
11:44Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators
Published on: August 15, 2014
10.3K
相关概念视频
01:12Mesh Analysis for AC Circuits
369
In the domain of radio communication, the significance of impedance matching must be considered. It is crucial to ensure the efficient transmission of signals between radio transmitters and receivers. Achieving this balance involves using impedance-matching circuits, with one fundamental configuration comprising a resistor, capacitor, and inductor.
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
369
01:21Impedance Combination
432
Consider a string of christmas lights, each bulb symbolizing an impedance element. In this series configuration, the flow of electric current remains uniform across every component. This behavior aligns with Kirchhoff's Voltage Law (KVL), which asserts that the total impedance in such a setup equals the sum of individual impedances—akin to resistors in series. It follows that the voltage from the power source is distributed proportionally among these components, adhering to the...
432
01:25Multimachine Stability
151
Multimachine stability analysis is crucial for understanding the dynamics and stability of power systems with multiple synchronous machines. The objective is to solve the swing equations for a network of M machines connected to an N-bus power system.
In analyzing the system, the nodal equations represent the relationship between bus voltages, machine voltages, and machine currents. The nodal equation is given by:
In analyzing the system, the nodal equations represent the relationship between bus voltages, machine voltages, and machine currents. The nodal equation is given by:
151
01:17The Delta-to-Delta Circuit
597
In a delta-delta configuration, the source and the load are connected in a delta manner, forming a closed loop that divides the network into three distinct phases. This configuration makes the phase voltages identical to line voltages. Assuming the sources are in positive sequence, the phase voltages can be expressed directly without having a neutral wire.
597
01:20Mesh Analysis
633
Mesh analysis is a valuable method for simplifying circuit analysis using mesh currents as key circuit variables. Unlike nodal analysis, which focuses on determining unknown voltages, mesh analysis applies Kirchhoff's voltage law (KVL) to find unknown currents within a circuit. This method is particularly convenient in reducing the number of simultaneous equations that need to be solved.
A fundamental concept in mesh analysis is the definition of meshes and mesh currents. A mesh is a closed...
A fundamental concept in mesh analysis is the definition of meshes and mesh currents. A mesh is a closed...
633
01:27Series Impedances: Three-Phase Line
103
Calculating series impedances for a three-phase overhead line involves evaluating resistances and inductive reactances in a network with three-phase and multiple neutral conductors grounded at regular intervals.
Using Kirchhoff's laws, an integro-differential equation for the network is derived. This equation accounts for unbalanced phase currents, which may induce return currents through neutral wires and the earth, seeking the least impedance path. Earth return conductors can replace the...
Using Kirchhoff's laws, an integro-differential equation for the network is derived. This equation accounts for unbalanced phase currents, which may induce return currents through neutral wires and the earth, seeking the least impedance path. Earth return conductors can replace the...
103