Peak Shaving Strategy of Concentrating Solar Power Generation Based on Multi-Time-Scale and Considering Demand Response

According to the multi-time-scale characteristics of power generation and demand-side response(DR)resources,as well as the improvement of prediction accuracy along with the approaching operating point,a rolling peak shaving optimization model consisting of three different time scales has been proposed.The proposed peak shaving optimization model considers not only the generation resources of two different response speeds but also the two different DR resources and determines each unit combination,generation power,and demand response strategy on different time scales so as to participate in the peaking of the power system by taking full advantage of the fast response characteristics of the concentrating solar power(CSP).At the same time,in order to improve the accuracy of the scheduling results,the combination of the day-ahead peak shaving phase with scenario-based stochastic programming can further reduce the influence of wind power prediction errors on scheduling results.The testing results have shown that by optimizing the allocation of scheduling resources in each phase,it can effectively reduce the number of starts and stops of thermal power units and improve the economic efficiency of system operation.The spinning reserve capacity is reduced,and the effectiveness of the peak shaving strategy is verified.

ESP教学理念下大学英语教师角色转换与发展路径

专门用途英语(English for Specific Purpose,简称ESP)是大学英语教学改革的主要发展方向。ESP教学,师资是关键,大学英语教师的专业素质和专业发展已成为决定ESP教学成败的重要因素。文章以ESP教学理念为依托,探讨大学英语教师向ESP教师转型过程中的角色定位。在ESP教学理念指导下,大学英语教师在教学中扮演着教学的动态需求分析者、具备英语知识和跨专业知识的教学者、以学生为中心的课程设计者和精通ESP教学评估的研究者等多元化角色。以角色转换为基础,文章还提出通过自我发展途径、合作发展途径和校本培训途径来调整和优化大学英语教师发展路径,以完善大学英语教师知识结构,为实现其职业的专业化发展指明方向。

ICU患者置入Power PICC导管特殊异位原因分析

目的:探讨ICU患者置入Power PICC导管后头端反折向上至同侧和对侧锁骨下静脉、头臂静脉等特殊异位的相关因素。方法:回顾性分析2021年9月至2022年9月某三甲医院ICU 520例PICC置管患者,通过胸部X线确定PICC导管头端反折向上至对侧和同侧锁骨下静脉、头臂静脉的患者,分析其特殊异位发生因素。结果:胸部X线结果显示25例患者PICC管头端反折向上异位至对侧和同侧锁骨下静脉、头臂静脉或颈内静脉,异位发生率4.8%,不同静脉置管反折异位发生率相比差异无统计学意义,P>0.05。结论:ICU患者PICC置入发生导管头端反折向上至同侧和对侧锁骨下静脉、头臂静脉等特殊异位的发生因素较多,包括同时留置CVC或血透管、正在滴注或泵入多种药物、PICC管头端异位的隐匿性、导管材质、自身疾病及机械通气等危险因素。

基于ESP8266的单片机无线烧写器的设计与实现

为了简化51单片机烧写流程,克服传统单片机有线烧写的弊端,设计了基于ESP8266的单片机无线烧写器。该无线烧写器以ESP8266作为主控单元,通过Wi-Fi网络使用TCP协议与PC上的TCP服务器进行通信,获取烧写BIN文件,然后通过ESP8266内的烧写控制程序,适时对51单片机的电源进行控制,实现51单片机程序的自动烧写。测试结果验证了该设计方案的正确性和可用性。

立德树人视域下职业院校ESP教材编写与使用评估研究——以高职“警务英语”教材建设为例

从立德树人视角积极探索职业院校ESP教材的编写改革和使用评估,能提高对ESP教材的使用效率,使教材可以真正为职业教育改革服务。本文以高职院校“警务英语”教材建设为例,基于立德树人根本任务的指引,对职业院校ESP教材的编写与使用评估进行了系统探究,提出了教材建设的建议,希望能优化警务英语教学指导体系,促进职业院校人才培养工作的全面创新。

基于调和概率语言术语集的Power平均算子

实践发现现存概率语言Power平均算子在应用中存在概率信息丢失、计算过于繁琐等问题,针对这些问题,提出一种基于调和概率语言术语集的Power平均算子。结合新的基本运算法则与新的支撑度,给出新的概率语言Power平均算子、概率语言Power几何平均算子、概率语言Power加权平均算子、概率语言Power加权几何平均算子,同时论证分析了这几类新型算子的性质。最后通过实验数据,将提出的算子与现存算子进行对比分析,验证了所提算子的有效性与可行性。

基于IESPSO的舵机倾转矢量动力系统建模与参数辨识

针对在旋翼动态时产生的外力矩影响下,倾转矢量动力系统中的舵机系统模型辨识精度低、实际响应难以估计的问题,本文将舵机外力矩作为扰动噪声纳入辨识环节,构建系统模型,并提出了一种基于改进生态系统粒子群优化(IESPSO)的倾转旋翼舵机系统参数辨识方法。为确保试验稳定安全进行,本文设计了倾转矢量动力系统辨识平台,进行参数辨识试验。试验结果表明,在旋翼动态时产生的外力矩噪声影响下,IESPSO相对于粒子群优化法、生态系统粒子群优化法与递推最小二乘法,均方根误差降低了1.46%,1.79%与56.37%,辨识精度有明显提升,并具备更快的寻优收敛速度。在修改搜索空间后,IESPSO仍具有较高的寻优精度,避免了在宽搜索空间下无法快速搜索至较优可行解的问题。

Economic Analysis of Demand Response Incorporated Optimal Power Flow

Demand Response(DR)is one of the most cost-effective and unfailing techniques used by utilities for consumer load shifting.This research paper presents different DR programs in deregulated environments.The description and the classification of DR along with their potential benefits and associated cost components are presented.In addition,most DR measurement indices and their evaluation are also highlighted.Initially,the economic load model incorporated thermal,wind,and energy storage by considering the elasticity market price from its calculated locational marginal pricing(LMP).The various DR programs like direct load control,critical peak pricing,real-time pricing,time of use,and capacity market programs are considered during this study.The effect of demand response in electricity prices is highlighted using a simulated study on IEEE 30 bus system.Simulation is done by the Shuffled Frog Leap Algorithm(SFLA).Comprehensive performance comparison on voltage deviations,losses,and cost with and without considering DR is also presented in this paper.

基于“产出导向法”的涉海ESP词汇教学研究——以“水产养殖”为例

海洋经济全球化背景下,中国对涉海外语人才需求呈多元化、专业化趋势。有效的涉海专门用途英语(ESP)教学能够保障人才培养质量,而涉海ESP词汇教学是该课程的关键环节。为解决学生涉海ESP词汇使用意识匮乏,对抽象词汇的语义、语境、搭配理解力弱,产出能力低的问题,采用产出导向法,以“水产养殖”单元词汇为例设计并实施教学活动,研究发现:产出导向法能够提升学生对涉海ESP词汇的意识、理解和使用能力。

Bio-Inspired Optimal Dispatching of Wind Power Consumption Considering Multi-Time Scale Demand Response and High-Energy Load Participation

Bio-inspired computer modelling brings solutions fromthe living phenomena or biological systems to engineering domains.To overcome the obstruction problem of large-scale wind power consumption in Northwest China,this paper constructs a bio-inspired computer model.It is an optimal wind power consumption dispatching model of multi-time scale demand response that takes into account the involved high-energy load.First,the principle of wind power obstruction with the involvement of a high-energy load is examined in this work.In this step,highenergy load model with different regulation characteristics is established.Then,considering the multi-time scale characteristics of high-energy load and other demand-side resources response speed,a multi-time scale model of coordination optimization is built.An improved bio-inspired model incorporating particle swarm optimization is applied to minimize system operation and wind curtailment costs,as well as to find the most optimal energy configurationwithin the system.Lastly,we take an example of regional power grid in Gansu Province for simulation analysis.Results demonstrate that the suggested scheduling strategy can significantly enhance the wind power consumption level and minimize the system’s operational cost.

基于ESP32物联网北斗定位系统智能OLED手环的设计

针对现有智能手环定位依赖手机的局限,本文设计一款基于ESP32和AR512G定位模块的自主定位智能手环,该手环实现了无需手机即可进行高精度运动轨迹定位的功能,解决了轻便运动场景下的定位需求。此外,本设计还集成了红外发射控制模块,可实现对家电的智能化远程控制,进一步拓展可穿戴设备的应用范围。经过定位和家电控制测试,结果证明本设计实现了预期功能,达到了精度和效果要求。本设计为智能穿戴设备的发展提供了新的设计思路。

A robust optimization model for demand response management with source-grid-load collaboration to consume wind-power

To accommodate wind power as safely as possible and deal with the uncertainties of the output power of winddriven generators,a min-max-min two-stage robust optimization model is presented,considering the unit commitment,source-network load collaboration,and control of the load demand response.After the constraint functions are linearized,the original problem is decomposed into the main problem and subproblem as a matrix using the strong dual method.The minimum-maximum of the original problem was continuously maximized using the iterative method,and the optimal solution was finally obtained.The constraint conditions expressed by the matrix may reduce the calculation time,and the upper and lower boundaries of the original problem may rapidly converge.The results of the example show that the injected nodes of the wind farms in the power grid should be selected appropriately;otherwise,it is easy to cause excessive accommodation of wind power at some nodes,leading to a surge in reserve costs and the load demand response is continuously optimized to reduce the inverse peak regulation characteristics of wind power.Thus,the most economical optimization scheme for the worst scenario of the output power of the generators is obtained,which proves the economy and reliability of the two-stage robust optimization method.

基于ESP8266模块的叉车激光测距装置设计与实现

叉车是重要的物料运输基础装备,为生产带来便利的同时,其作业安全不容忽视。本文依据叉车的操作间隙与安全区域特征进行分析,以三角法激光测距为理论依据,使用ESP8266模块为主控芯片,设计了ESP8266、CCD传感器、OLED屏及蜂鸣器的接口电路及控制程序,实现3种测距范围的不同控制及显示形式。并将该装置应用于某机械厂的锂电池平衡重式又车中,在叉车的前工作面及尾部进行了距离测量测试,结果证实该装置的平均测量误差小于5毫米,满足测距及安全驾驶提醒的要求,能实现叉车作业安全的动态监测及预警功能。

Carbon emission reduction:Contribution of photovoltaic power and practice in China

As a clean and renewable form of energy,photovoltaic(PV)power generation converts solar energy into electrical energy,reducing the consumption of fossil fuels and significantly lowering greenhouse gas emissions.Amidst the global transition towards cleaner forms of energy,countries all around the world are vigorously developing PV technology.

Electricity-Carbon Interactive Optimal Dispatch of Multi-Virtual Power Plant Considering Integrated Demand Response

As new power systems and dual carbon policies develop,virtual power plant cluster(VPPC)provides another reliable way to promote the efficient utilization of energy and solve environmental pollution problems.To solve the coordinated optimal operation and low-carbon economic operation problem in multi-virtual power plant,a multi-virtual power plant(VPP)electricity-carbon interaction optimal scheduling model considering integrated demand response(IDR)is proposed.Firstly,a multi-VPP electricity-carbon interaction framework is established.The interaction of electric energy and carbon quotas can realize energy complementarity,reduce energy waste and promote low-carbon operation.Secondly,in order to coordinate the multiple types of energy and load in VPPC to further achieve low-carbon operation,the IDR mechanism based on the user comprehensive satisfaction(UCS)of electricity,heat as well as hydrogen is designed,which can effectively maintain the UCS in the cluster within a relatively high range.Finally,the unit output scheme is formulated to minimize the total cost of VPPC and the model is solved using theCPLEX solver.The simulation results showthat the proposed method effectively promotes the coordinated operation among multi-VPP,increases the consumption rate of renewable energy sources and the economics of VPPC and reduces carbon emissions.

Highlights in recent wireless power IC research

Wireless power transfer(WPT)has been a popular topic in power integrated circuit(IC)designs in the past decade.As slogan"cutting the last wire"presented in ISSCC’15[1],WPT is poised to take over many wired power deliveries applica-tions today,just like what happened to wireless communica-tion nowadays.Over the years,WPT has become more mature and more wirelessly charged or powered products have become available on the market.This mini review intends to summarize recent breakthroughs in WPT inte-grated circuits(IC)research.

A Special Issue:“Key Technologies of Virtual Power Plant and Distributed Energy Resources”for Global Energy Interconnection

The increasing penetration of renewable and distributed energy resources(DERs)is transforming the power grid into a new type of clean and low-carbon power system.However,the uncertainty and volatility of DERs have also brought severe challenges to the secure and reliable operation of the power systems.In order to successfully integrate renewable DERs,virtual power plant(VPP)has emerged as a new technique for coordinating demand-side DERs,which has drawn significant attention from industry and academia.

美术专业进行ESP英语教学的探讨

本文通过分析对美术专业进行ESP教学的必要性及当下美术专业大学英语教学的现状,探讨在美术专业进行ESP英语教学的途径,从而提高美术人才综合素质,实现培养人才国际化目的。

Traction power systems for electrified railways:evolution,state of the art,and future trends

Traction power systems(TPSs)play a vital role in the operation of electrified railways.The transformation of conventional railway TPSs to novel structures is not only a trend to promote the development of electrified railways toward high-efficiency and resilience but also an inevitable requirement to achieve carbon neutrality target.On the basis of sorting out the power supply structures of conventional AC and DC modes,this paper first reviews the characteristics of the existing TPSs,such as weak power supply flexibility and low-energy efficiency.Furthermore,the power supply structures of various TPSs for future electrified railways are described in detail,which satisfy longer distance,low-carbon,high-efficiency,high-reliability and high-quality power supply requirements.Meanwhile,the application prospects of different traction modes are discussed from both technical and economic aspects.Eventually,this paper introduces the research progress of mixed-system electrified railways and traction power supply technologies without catenary system,speculates on the future development trends and challenges of TPSs and predicts that TPSs will be based on the continuous power supply mode,employing power electronic equipment and intelligent information technology to construct a railway comprehensive energy system with renewable energy.

基于ESP8266的智能家居环境监测系统设计与实现

监测家居环境有利于提高家庭环境的舒适度和便利性,有利于改善家庭的生活质量,本系统以多个ESP8266开发板为核心,利用传感器采集室内环境信息,并将数据上传至云平台,通过微信小程序调用云平台数据对室内环境进行远程监测,利用Mesh组网技术实现多个ESP8266开发板的连接。经过实验与检测证明,该系统能够满足对家居环境智能监测的基本需求,实现了智能家居监测系统的设计目标。