基于D－S证据理论的电能质量在线监测算法研究

摘要

The level of power quality is an important embodiment of safe operation and quality service of the company .The modern power grid continues to develop to provide the reliability and quality of power supply , but also brings the potential dan-gers.Some equipments or line failures in local power grid may cause a vicious chain reaction , eventually lead to power outages over a large area , and seriously impact on the reliability of power supply .On the other hand , in recent years , with the concept of energy saving , environmental protection and sustainable development , a large number of non-controllable power points are connected to the main power grid , which brings great challenges for the security and reliability of power grid .Therefore, it is important to study and establish an effective monitoring system for power quality , which can realize on -line monitoring for voltage, frequency and reliability of power grid and is of great significance to improving safe operation and service level .%电能质量水平高低是公司电网安全运行水平和优质服务水平的重要体现。现代电网不断发展，提供了可靠性，保证了供电质量，但同时也带来了潜在的危险，局部电网的某些设备或线路故障，可能诱发恶性连锁反应，并最终酿成大面积停电的重大系统事故，严重影响供电可靠性。另一方面，近年来随着节能环保和可持续发展观念的建立，大量不可控制的电源点并入主网架，给电网的安全与供电可靠性带来了巨大的挑战。因此，研究和建立起一套高效的电网供电质量监测系统，实现电网内电压、频率和可靠性数据的全局的在线监测，对于提升安全运行与服务水平，具有重要意义。