Droop Control Strategy of Distributed Photovoltaic Reactive Power Considering Probability Distribution [PDF]
Distributed photovoltaic access to the distribution network has gradually become a trend, but the large-scale distributed photovoltaic grid connection will cause serious power flow reversal, resulting in out-of-limit voltage and network loss increase ...
DAI Jianfeng +5 more
core +1 more source
Photovoltaic-Wind Hybird Generating Device and Design of Its Monitoring System [PDF]
, 2010 传统的太阳能发电或者风力发电容易受环境变化影响，采用风光互补混合发电技术能够解决传统单一供电不足，实现系统连续、稳定的供电。随着混合发电技术的快速发展，发电站规模将不断扩大，多机型的发电机组也越来越普遍。如何采用一种有效的监控系统，提高各个发电机组的运行效率，保持系统的供用电的平衡，是当前所需要解决的主要难点之一。 本文从风力发电机的类型与结构、光伏阵列类型、蓄电池的作用三个方面对太阳能风能混合发电装置进行简单说明，并设计了相应的监控系统来实现对混合发电装置进行有效管理，提高混合发电装置的综合发电能力 ...
黄志煌
core
Investment Decision and Economic Analysis of Distributed Photovoltaic Power Stations [PDF]
ObjectivesWith the continuous advancement of China’s photovoltaic (PV) industry, the industry is transitioning from being heavily reliant on government policy subsidies to achieving grid parity, which places higher demands on the economic benefits of PV ...
CHEN Heng +4 more
core +1 more source
Gaoya dianqi, 2012 由于光伏阵列的IV特性存在强烈的非线性,光伏系统的最大功率跟踪工作电压可能处于不同的非线性区段,系统调节器的不合理设计,可能造成系统的不稳定甚至崩溃。笔者针对光伏系统存在的不稳定区域问题,通过建立系统状态方程和传递函数,分析系统在MPPT控制中出现的不稳定现象和原因,并进行了仿真和实验验证,确定了影响因素。通过对系统控制参数的正确调节以及母线电容的适当选择可以增加系统的稳定性。
黄明玖, 罗皓泽, 苏建徽
doaj
Soft detection model of corrosion leakage risk based on KNN and random forest algorithms [PDF]
Objective The integrity management of urban gas pipeline networks demands effective risk assessment methods. Corrosion leakage risk assessment necessitates the comprehensive integration of risk assessment factors with various detection operations ...
Chengzhi LI +4 more
core +1 more source
Dianci bileiqi, 2018 屋顶式光伏发电系统应用前景广泛,对其供电可靠稳定性的要求也越来越高,因此做好屋顶光伏发电系统的雷击浪涌防护至关重要。分析了屋顶光伏发电系统雷击浪涌危害途径,利用EMTP软件搭建外部防雷系统和光伏发电系统等效电路模型,计算雷击接闪器时光伏发电系统浪涌过电压,讨论雷电流幅值、接地电阻和SPD保护模式对降低雷击浪涌危害的防护效果。分析结果表明:雷击建筑外部接闪器时,绝大部分雷电流经由引下线泄散,流经直流电缆的雷电流较小;光伏阵列和逆变器过电压随着雷击电流幅值和接地电阻的增大而增加;在直流电缆正极 ...
赵清江, 王玥
doaj
Research on Short-Term Forecasting of Multiple Loads in Integrated Energy Systems Based on Composite Correlation Coefficients [PDF]
ObjectivesTo ensure the stable operation of the power grid, it is crucial to accurately predict the multivariate loads within an integrated energy system.
LI Hui, TU Weiquan, WAN Zheng
core +1 more source
Gaoya dianqi, 2018 随着直流微电网系统的广泛应用,其控制技术得到不断关注。直流微电网系统由光伏阵列、电动汽车充换站、大电网及其接口变换器构成。针对其结构特点,采用一种能量协调控制策略以维持直流母线的电压稳定。该控制策略根据直流微电网中母线电压信息（DBS）进行运行模式划分,不同运行模式下,直流微电网各单元的控制策略可进行无缝切换,实现系统协调自治。采用下垂控制实现对多个光伏阵列或者电动汽车蓄电池模块的功率均分。仿真结果表明,直流母线电压保持稳定的同时,直流微电网系统能够在并离网不同模式间进行平滑切换 ...
张国荣, 王啸飞, 王盛
doaj
Design and Implementation of Computer Monitor System in Large Scale Grid-connected PV Power Plant [PDF]
, 2012 在世界各国竞相发展绿色可再生能源的今天，太阳能凭借其独特的优点受到了一致的青睐。开发利用太阳能成为各国制定可持续发展战略的重要内容，光伏发电已成为解决能源短缺和环境污染的重要途径之一。由于光伏电站一般建设在偏僻地区，现场查看不便，光伏电站计算机监控系统成为管理光伏电站的必备工具。 本文以光伏电站计算机监控系统为研究对象，从需求分析、系统设计、功能实现、集成测试等方面对监控系统的主要功能、平台架构等进行了设计及研究。本文详细分析了监控系统的开发设计方案。重点给出了网络通信管理、数据库管理 ...
孙玉泰
core
An intelligent lithology identification method for sandstone and mudstone strata and its applications: A case study of the Jurassic strata in the Lunnan area, Xinjiang, China [PDF]
ObjectiveLithology identification lays the foundation for fine-scale reservoir evaluation. However, traditional identification methods generally utilize the interactive relationships between only 2‒3 logging parameters, suffering from low utilization ...
Chengguang ZHANG +8 more
core +1 more source