强大的SMC-PSS和AVR设计:一个连接到电网的太阳能集中OTEC系统应用程序
Hussein Abubakr1,2, Abderezak Lashab1, Tarek Hassan Mohamed2
1Centre for Research on Microgrids (CROM), AAU Energy, Aalborg University, Aalborg, Denmark.
PloS one
|December 22, 2023
概括
本研究介绍了海上太阳能集中海洋热能转换 (SC-OTEC) 系统的新控制策略. 这种先进的方法提高了电网稳定性和发电机阻尼,改善了干扰期间的性能.
科学领域:
- 可再生能源系统可再生能源系统
- 海洋热能转换 (OTEC) 方法
- 电力系统的稳定性和控制
背景情况:
- 离岸太阳能集中海洋热能转换 (SC-OTEC) 系统对于利用海洋温度差异来发电至关重要.
- 对于SC-OTEC系统的现有控制方法表现出协调不良,导致同步发电机 (SG) 的动态稳定性和阻尼性不足.
- 挑战包括对干扰的缓慢适应和由于复杂的控制约束和计算需求而有限的补偿能力.
研究的目的:
- 开发和评估一种先进的控制策略,以提高与交流电网相连的SC-OTEC系统的动态稳定性和阻尼性能.
- 解决传统控制方法在管理突发干扰和确保可靠发电方面的局限性.
主要方法:
- 实施了混合控制策略,将滑动模式控制 (SMC) 和动力系统稳定器 (PSS) 结合起来.
- 一个辅助的二级自动电压调节器 (AVR) 与一个非线性激发器系统集成,用于增强缓.
- 控制器收益通过使用修改后的鱼优化算法进行了自适应调整,该算法包含气球效应调制.
- 用MATLAB/Simulink进行模拟,使SC-OTEC系统受到严重故障,太阳辐射变化,温度变化和负载波动的影响.
主要成果:
- 拟议的控制策略在维持SC-OTEC系统稳定性方面表现出强的表现.
- 实现了同步发电机的有效减压,明显优于传统方法.
- 该系统在各种模拟干扰场景下显示了弹性和有效的补偿能力.
结论:
- 集成的SMC-PSS和二级AVR控制策略显著提高了SC-OTEC系统的动态稳定性和缓性.
- 使用修改后的鱼优化算法的自适应调整方法有效地优化了控制器性能.
- 提出的方法为SC-OTEC电力可靠和稳定地集成到现有电网中提供了一个有希望的解决方案.
相关概念视频
01:20Power Factor Correction
181
The power transmission to a factory involves the transfer of apparent power, a combination of active and reactive power. The power factor measures how effectively electrical power is converted into useful work output. The ratio of the real power (KW) that does the work to the apparent power (KVA) supplied to the circuit.
181
01:25Power System Distribution
240
Power system distribution involves delivering electrical energy from power plants to consumers through a network of transmission and distribution systems. The process begins at power plants, where energy from coal, gas, nuclear, water, and wind is converted into electrical energy. These plants use three-phase generators, typically rated between 50 to 1300 MVA, with terminal voltages ranging from a few kV to 20 kV, depending on the size and age of the units.
The transmission system is designed...
The transmission system is designed...
240
01:21Generator Voltage Control
157
Generator voltage control is crucial for maintaining the stable operation of synchronous generators and wind turbines. In older models, a DC generator driven by the rotor delivers DC power to the rotor's field winding, and the power is transferred through slip rings and brushes. In the latest models, static or brushless exciters are used. Static exciters rectify AC power from the generator terminals and then transfer the DC power directly to the rotor. Brushless exciters, on the other hand,...
157
01:15Conservation of AC Power
337
The principle of power preservation is applicable to both ac and dc circuits. This principle, when applied to AC power, asserts that the complex, real, and reactive powers produced by the source are equal to the total complex, real, and reactive powers absorbed by the loads. When two load impedances are connected in parallel to an ac source V, the complex power provided by the source can be calculated using the relation
337
01:22Full wave rectifier
1.2K
A full-wave rectifier is a device that converts alternating current (AC) to direct current (DC) and is more efficient than its half-wave counterpart. It typically includes a center-tapped transformer, two diodes, and a load resistor. The secondary winding of the transformer is divided to provide two equal voltages of opposite polarities, which is the pivotal element of full-wave rectification.
1.2K
01:16Maximum Power Transfer
262
Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
By substituting the entire circuit with...
By substituting the entire circuit with...
262