摘要
分布式电源并网时易受到电压降落的影响,使得求取的电网电压无功阈值不准确,从而导致控制后分区无功裕度较高。为了解决这一问题,提出基于模糊逻辑的有源电网电压无功时序自动化控制系统。依据系统的基本功能与实现需求,设计系统的硬件部分,包括无功滤波装置和自动交互接口,基于此,充分考虑电压降落带来的电压无功波动,定义电压调节系数,并结合电力设备的无功概率得到电压无功阈值,由此求取电压无功排序, 并采用模糊逻辑理论模糊化电压峰值,结合无功储备系数输出电压无功补偿值,从而实现对电压无功的时序控制。系统性能测试结果表明,利用所设计的系统对有源电网进行电压无功时序控制解耦,输出的分区无功裕度较低,控制性能更加优异。
When distributed power sources are connected to the grid,they are easily affected by voltage drop,which leads to inaccurate calculation of the grid voltage and reactive power threshold,resulting in higher zone reactive power margin after control.To address this issue,a fuzzy logic based automatic control system for voltage and reactive power timing in active power grids is proposed.Based on the basic functions and implementation requirements of the system,design the hardware part of the system,including reactive power filtering device and automatic interaction interface.Based on this,fully consider the voltage and reactive power fluctuations caused by voltage drop,define the voltage regulation coefficient,and combine the reactive power probability of power equipment to obtain the voltage and reactive power threshold.From this,calculate the voltage and reactive power sorting,and use fuzzy logic theory to fuzzify the voltage peak value.Combined with the reactive power reserve coefficient,output the voltage and reactive power compensation value,thereby realizing the timing control of voltage and reactive power.The system performance test results show that using the designed system to decouple the voltage and reactive power timing control of the active power grid results in lower output zone reactive power margin and better control performance.
作者
王苏娅
WANG Suya(Xi’an Railway Vocational and Technical College,Xi’an 710026,China)
出处
《自动化与仪器仪表》
2025年第10期133-137,共5页
Automation & Instrumentation
关键词
模糊逻辑
有源电网
电压谐波
电压无功控制
无功补偿
fuzzy logic
active power grid
voltage harmonics
voltage and reactive power control
reactive power compensation
