用模糊的蒙特卡洛不确定性分析提高协调效率,用于分布式发电中双设置定向超流中继
Faraj Al-Bhadely1, Aslan İnan1
1Department of Electrical Engineering, Yildiz Technical University, Istanbul 34220, Turkey.
Sensors (Basel, Switzerland)
|July 13, 2024
概括
本研究优化了分布式发电 (DG) 电网的定向超流继电器 (DOCR) 设置. 这种新的方法提高了电网保护和抵御GD输出和负载消耗的不确定性.
科学领域:
- 电气工程 电气工程
- 电力系统 电力系统
- 整合可再生能源的整合
背景情况:
- 由于分布式发电 (DG) 的增加和运营不确定性,现代电力网络面临着保护方面的挑战.
- 现有的保护计划往往忽视了总局资源的动态性和变化性.
- 确保电网可靠性,安全性和效率需要强大的保护策略.
研究的目的:
- 建议和评估一个新的方法,以优化分布网络的定向超流继电器 (DOCR) 设置,与总局.
- 加强继电协调,考虑到GD发电和负载消耗的不确定性.
- 提高发电系统的整体弹性.
主要方法:
- 为DOCRs开发了一个双设置特征.
- 使用维布尔概率函数对资源行为进行DG模拟的电力网络.
- 采用模糊的蒙特卡洛方法来处理发电和消费的不确定性.
- 利用狮优化器 (ALO) 算法在 MATLAB 中进行中继设置优化.
主要成果:
- 与传统方法相比,在IEEE 14-bus和IEEE 30-bus系统上显著减少了DOCR总运行时间.
- 在各种总局输出和负载消耗不确定性场景中实现了DOCR的弹性协调.
- 验证了拟议的双设定特征的有效性.
结论:
- 拟议的DOCR设置优化方法有效地解决了GD和负载消耗的不确定性.
- 这种方法提高了电力系统的弹性和协调.
- 这项研究为电力网络保护领域提供了宝贵的贡献,其中包括集成可再生能源.
相关概念视频
Directional Relays
103
Directional relays, essential for managing unidirectional fault currents, enhance the safety and efficiency of power systems. On power lines equipped with directional relays, faults downstream (to the right) of the current transformer typically cause the fault current to lag the bus voltage by approximately 90 degrees, known as the forward direction. In contrast, upstream (left-side) faults may result in the fault current leading the bus voltage by nearly 90 degrees, termed the reverse...
103
Line Protection with Impedance Relays
76
Coordinating time-delay overcurrent relays in complex radial systems and directional overcurrent relays in multi-source transmission loops can be challenging. Impedance relays address these issues by responding to the voltage-to-current ratio, specifically measuring the apparent impedance of a line. These relays become more sensitive during faults as current increases and voltage decreases, thereby reducing the apparent impedance.
Under normal conditions, low load currents keep the measured...
Under normal conditions, low load currents keep the measured...
76
Reclosers and Fuses
100
Automatic circuit reclosers enhance the protection of distribution circuits by interrupting and auto-reclosing an AC circuit according to a preset sequence. They effectively manage temporary faults on overhead distribution lines, often caused by tree limbs or wildlife, by briefly disrupting service to improve overall reliability. However, contact with reclosers or energized broken conductors on the ground can pose serious hazards.
A comprehensive protection scheme for radial distribution...
A comprehensive protection scheme for radial distribution...
100
Overcurrent Relays
76
Overcurrent relays, crucial for circuit protection, are connected to the secondary current of a current transformer. There are two primary types of overcurrent relays: instantaneous and time-delay.
Instantaneous overcurrent relays activate immediately when the input current exceeds a predetermined value, known as the pickup current, instantly energizing the circuit breaker trip coil. This rapid response is vital for addressing severe faults quickly.
Time-delay overcurrent relays, on the other...
Instantaneous overcurrent relays activate immediately when the input current exceeds a predetermined value, known as the pickup current, instantly energizing the circuit breaker trip coil. This rapid response is vital for addressing severe faults quickly.
Time-delay overcurrent relays, on the other...
76
Distribution Reliability and Automation
107
Distribution reliability in electrical power systems is critical for ensuring an uninterrupted power supply to consumers at minimal cost. According to IEEE Standard Terms, reliability is the probability that a device will function without failure over a specified time period or amount of usage. For electric power distribution, this translates to maintaining continuous power supply and addressing customer concerns over power outages. Several indices, as defined by IEEE Standard 1366-2012, are...
107
Distributed Loads: Problem Solving
639
Beams are structural elements commonly employed in engineering applications requiring different load-carrying capacities. The first step in analyzing a beam under a distributed load is to simplify the problem by dividing the load into smaller regions, which allows one to consider each region separately and calculate the magnitude of the equivalent resultant load acting on each portion of the beam. The magnitude of the equivalent resultant load for each region can be determined by calculating...
639


