Hybrid Simulation of ±500 kV HVDC Power Transmission Project Based on Advanced Digital Power System Simulator

In order to effectively imitate the dynamic operation characteristics of the HVDC （high voltage direct current） power transmission system at a real ±500kV HVDC transmission project, the electromechanical-electromagnetic transient hybrid simulation was carried out based on advanced digital power system simulator （ADPSS）. In the simulation analysis, the built hybrid model＇s dynamic response outputs under three different fault conditions are considered, and by comparing with the selected fault recording waveforms, the validities of the simulation waveforms are estimated qualitatively. It can be ascertained that the hybrid simulation model has the ability to describe the HVDC system＇s dynamic change trends well under some special fault conditions.

Training, simulation, restoration expert system for power grid

The paper introduces some technology for training, simulation, restoration expert system of power grid, the structure of the system including function composition, hardware and software composition are discussed, knowledge representation and the method to establish device graphical library for expert system are given, the fault setting and diagnosis for training and simulation as well as restoration technology with deep first searching arithmetic and heuristic inference are presented. The research provides a good base for developing the training, simulation, restoration system of power companies.

A DISPATCHER TRAINING SIMULATOR SYSTEM INTEGRATED WITH THE EXIST SCADA/EMS

To utilize exist SCADA(Supervisory Control and Data Acqui si tion)/EMS (Energy Management System) fully and economize capital, Henan Electric Power Dispatching and Communication Center in China established a set of Henan Dispatcher Training Simulator (HNDTS) base on its exist SCADA/EMS. In order to i ntegrated with exist SCADA/EMS, the integration method and technique are propose d. Graph data integration discussed with emphasis. After integration implemented , HNDTS can share all data with SCADA/EMS and dispatchers can be trained in same environment as real work situation, in the same time it can avoid amout of work of maintenance engineers. Both advantages and disadvantages of integration are analyzed. In the end of paper, the requirement for future DTS is put forward bas e on the experience of author.

HIL Simulation of a Mixed Islanded Power Network with External DSP Regulator

The present paper deals with the development of a modular, flexible and structured block to block approach for the study of regulators by implementing the different blocks on a DSP （digital signal processor）. The proposed low-cost approach has been applied and validated by the implementation of an industrial regulator in a real time hardware-in-the-loop simulation of a mixed islanded power network including precise models of the hydraulic system. The studied network is constituted of three different types of electrical power generation systems and a consumer.

Study of Models for Heating Power Station Operator Training Systems

This paper is devoted to development and study of models for operator training systems of heating power station processes management. It proposed a mathematical model describing the management processes of heating power units of the technological complex considering the relationship of technological variables in deviations effective in real time. A software complex is developed for the system of training of operators controlling processes in heating station units. Obtained results may be used in the course of development of computer training systems for operators of heating power stations with cross-linkage.

基于Simulink的船舶电力系统仿真研究

针对传统用C++语言编写船舶电力系统模型的方法较为复杂的特点,将Simulink仿真与C++语言相结合,建立船舶电力系统基本模型。根据Simulink仿真发电机模块与算法的特点,结合模拟训练中实时性的要求,对基本模型进行改进,构建两种适用于不同算法的船舶电力系统仿真模型。仿真结果表明,定步长算法下的仿真模型可满足模拟训练实时仿真的要求;变步长算法下的仿真模型结合多项式拟合算法,可得到与实时仿真基本相同的结果。因此,两种仿真模型均适合于基于模拟训练的船舶电力系统。

Coupling real-time simulation of power supply,trains and dispatching for urban rail transit

In order to study the interaction among the traction power supply,the train group and the operation dispatching of urban rail transit,a coupling simulation system of power supply system,trains and dispatching management is constructed.In order to solve the problems of different timescales and difficult cooperation operation for related subsystems,a multi-bus distributed real-time network architecture based on hierarchical management of communication data is established,and simulation management software is developed to facilitate the free expansion of the simulation system.Meanwhile,the track line,train operation and other large timescale subsystems are realized by the pure digital simulation.And the time-sensitive subsystems,such as train traction system,braking system,auxiliary power supply system and network system etc.,are built by the semi-physical simulation.In this article,the system structure and the main implementation principle of each simulation subsystem are given in detail,and the system is tested and verified at the end.The results show that the simulation system can meet the expected requirements.

NR-PSS (Nonlinear Robust Power System Stabilizer) for large synchronous generators and its large disturbance experiments on real time digital simulator

On the foundation of nonlinear robust control and exact generator model, this paper presents a design principle of NR-PSS (Nonlinear Robust Power System Stabilizer) for multi-machine power system, based on which an industrial NR-PSS equipment is developed. For popularizing it, the proposed parameter setting method of NR-PSS is completely the same as the widely used parameter adjustment rule of PSS. By virtue of real time digital simulator (RTDS), large disturbance experiments are carried out to compare the performances between generator excitation system equipped with NR-PSS and PSS in order to verify the correctness of design theory. The results show that compared with classical PSS, the proposed NR-PSS can dramatically improve the generator damping and attenuate the oscillation much faster, enhance the generator damping and raise both the small signal and large disturbance transient stability transmission power limit remarkably. The NR-PSS equipment with independent intellectual property right has been successfully put into operation on a 300 MW generator in Baishan Hydro Plant of Northeast China Grid more than 10 months.

Real-time simulation platform for photovoltaic system with a boost converter using MPPT algorithm in a DSP controller

Recently, real-time simulation of renewable energy sources are indispensible for evaluating the performance of the maximum power point tracking （MPPT） controller, especially in the photovoltaic （PV） system in order to reduce cost in the testing phase. Nowadays, real time PV simulators are obtained by using analog and/or digital components. In this paper, a real-time simulation of a PV system with a boost converter was proposed using only the digital signal processor （DSP） processor with two DC voltage sources to emulate the temperature and irradiation in the PV system. A MATLAB/ Simulink environment was used to develop the real-time PV system with a boost converter into a C-program and build it into a DSP controller TMS320F28335. Besides, the performance of the real-time DSP-based PV was tested in different temperature and irradiation conditions to observe the P-V and V-I characteristics. Further, the performance of the PV with a boost converter was tested at different temperatures and irradiations using MPPT algorithms. This scheme was tested through simulation and the results were validated with that of standard conditions given in the PV data sheets. Implementation of this project helped to attract more researchers to study renewable energy applications without real sources. This might facilitate the study of PV systems in a real-time scenario and the evaluation of what should be expected for PV modules available in the market.

智慧康养虚拟仿真实训教学体系的构建与实践研究

针对当前虚拟仿真实训基地建设中普遍存在的重硬件建设轻实训应用、重单点应用轻体系集成、重资源引进轻自主研创等较普遍问题,基于职业能力重构理念,以数字化改革思维,构建了一批数字化虚拟仿真应用场景,形成了一套虚拟仿真实训教学的运行机制。实践表明,重构形成的定位区域化、平台共享化、模式多元化、机制长效化的虚拟仿真实训教学体系矩阵,促进了实训教学改革,提高了“岗课赛证”综合育人质量。

虚实结合的供配电实训系统研究设计

供配电培训在提高电力行业运行人员专业技能、提升电气专业学生知识水平方面发挥着不可取代的作用.针对供配电试验安全风险大、培训效率低等问题,开发出虚实结合的供配电实训系统,实现在低电压工作环境下模拟供配电高压试验.该供配电虚实结合实训系统与实际运行状况相接近,可以快速、高效地进行专业人员的培训,具有高低压供配电实操、综合自动化系统实操、供配电系统虚实结合模拟操作等功能.该系统提高了培训效率,改善了培训质量,并在教学试验阶段得到了较好的效果,具有一定的推广价值.

面向新型电力系统的时序生产模拟应用与求解技术综述

在建设新型电力系统背景下,时序生产模拟技术依托电网数字化转型赋能,成为了新型电力系统运行评估与规划决策的重要工具。文中总结了国内外对于时序生产模拟相关问题的研究成果,以及时序生产模拟在新型电力系统中的应用与求解技术。首先,介绍了时序生产模拟的结构及特点,从电力电量平衡测算、“双碳”措施量化分析、未来电网形态与演化路径等方面综述了时序生产模拟的应用场景。然后,根据现有时序生产模拟求解技术特点将其分类介绍,并讨论了不同求解技术的局限性。最后,对新型电力系统时序生产模拟研究进行了展望。

基于虚拟仿真技术的高职电力技术专业群实训体系重构探究

电力作为我国支柱产业之一,在新时代背景下,对“双高”人才的需求量与日俱增,而构建基于虚拟仿真技术的高职电力技术专业群实训体系能够更好地满足当前的人才培养要求。虚拟仿真技术在电力技术专业群及实训体系的应用过程中,应精准对接电力产业核心岗位集群,注重真实工作场景的实际需求和应用,面向行业需求并以行业需求为导向,将虚拟仿真技术融入到基础实训、专业实训以及综合实训三个层次,整合校企实训教学资源,建立“三场合一”实践教学基地,提升教学质量,重视教师队伍持续建设,并全面评估体系优缺点。

基于数字孪生技术的机电一体化虚拟实训设备设计与开发

该文以数字孪生技术为基础,通过NX MCD软件构建SX-815Q机电一体化综合实训设备的加盖拧盖单元模型,建立一套实训仿真系统,并用于机电一体化专业学生实际操作中,能够以近乎真实的场景,进行深入的专业综合训练,提升学生的专业技能和实践能力,取得良好效果。

地铁列车大功率高频辅助变流器散热系统的设计及优化试验验证

[目的]地铁列车大功率辅助变流器高度集成化后,散热要求越来越高,为此有必要提出散热系统新设计方案。[方法]通过系统的损耗计算、风机选型、散热风道布局等一系列正向设计,结合仿真来验证热设计的合理性。[结果及结论]仿真表明,在单台辅助变流器故障工况下,中间腔室流场分布不均,导致变压器温升较高,存在热失效风险。在此基础上对风道结构进行优化,仿真确认优化后风道的流场分布较均匀,变压器温升显著降低且在器件应用温度范围内,表明优化后散热系统满足应用需求。为验证理论设计的合理性,开展了样机的温升试验,对比仿真和样机试验结果,在单台/两台满载工况下,关键器件的温升和仿真温度差控制在5℃,均在选型的应用范围内,表明风道散热系统设计合理。通过正向优化设计提出了一种新型变流器散热系统及柜体结构,样机试验验证了仿真分析的有效性,大幅缩短了样机的开发周期,提高了市场响应速度,为大功率高频辅助变流器设计及优化提供方法及思路。

数字化视角下短跑动作训练虚拟仿真系统设计

文章从数字化视角下短跑动作训练系统的基础需求入手,构建了一种短跑动作训练虚拟仿真系统。该系统由输入层、功能层和可视化层等结构组成,主要功能包括短跑动作捕捉、训练方案生成、回放与评价等。对该系统的应用情况进行测试,结果表明:该系统可以在较低的时间延迟下为运动员提供完善的动作捕捉和虚拟训练功能,具有一定的实用性。

Automatic Voltage Regulator Test of Three Gorges Right Bank Hydropower Station

Based on real-time digital simulations(RTDS),a laboratory environment similar to the real-time operation situation of the Three Gorges Hydropower Station is established.Then,the causes for the power fluctuation of the second generator by errors in the rotor rotating speed calculation are found,and the tuning method of the speed related parameters are given.The damping and reverse tuning characteristics of power system stabilizers(PSSs)in the digital automatic voltage regulator(AVR)are compared and investigated in the frequency range of 0.18-1.1 Hz.The efficiency of the proposed tuning method for ensuring power system stability is verified by RTDS.Finally,field tests show the validity of the laboratory test results.

面向新型电力系统物理模拟实验的快速系统原型技术

新型电力系统对电力系统物理模拟实验提出了很高的要求,原有的物理模拟技术已难以满足。通过借鉴控制领域常用的快速控制原型(RCP)技术思想,提出了快速系统原型(RSP)技术,包括数字仿真器、快速原型控制器和快速原型被控对象(ROP)3个部分,解决了传统物理模拟技术费时费力和难以满足新型电力系统快速演进需求的缺陷。RSP技术用于科学研究、产品开发和入网验证时,研究成果和产品可直接用于工程实际。首先介绍了RSP的思想及具体实现方案,并阐述了其“所见即所得”的动模实验理念,最后以柔直输电动模实验为例,验证了基于RSP理念和技术可建成一个企业级别的仿真环境及工程技术实践平台,并能真实灵活仿真新型电力系统的各种特性。

一种多模型融合的风电系统永磁同步发电机数字孪生建模方法

针对当前风电系统永磁同步发电机(PMSG)建模技术存在设备内部参数理想化和系统耦合单一化的不足,无法满足数字孪生技术对设备虚拟模型要求的问题,提出一种面向数字孪生的风电系统永磁同步发电机建模方法。首先,依据实体样机参数,构建2 MW PMSG本体及电磁模型。之后为实现系统对PMSG的控制,基于联合仿真技术利用数字孪生建模平台搭建风电系统PMSG控制电路,实现多系统耦合仿真建模;在此基础上,充分考虑电机传热散热特性等影响,对PMSG热模型进行了构建与计算,并针对温度场计算流程复杂,不具备实时性等问题,引入一种改进的粒子群优化支持向量机(PSO-SVM)代理模型方法对热模型进行降阶处理并集成;最终完成了基于多模型融合的PMSG数字孪生虚拟模型建模,并采用实体风机运行数据进行验证与测试,结果表明该模型可以有效地反映PMSG真实运行特性。

知识驱动的大电网仿真分析知识建模方法及其在潮流智能调整问题中的应用

大电网数字仿真分析需要耗费大量的人力和时间成本来进行综合仿真分析,其分析和调整过程严重依赖人工经验知识,且由于经验知识表述的多样性和应用场景的特殊性,缺乏一套统一的知识表示方法。为此,提出一种电网人工智能仿真分析的知识建模方法。根据电网数字仿真分析调整知识经验的特点,将定性与定量、关联与事理知识相结合,分别针对调整流程、调整操作和程序调用设计基于主谓宾语(subject-predicate-object,SPO)的知识表示方法;搭建模块化的知识驱动模型将电网仿真分析过程智能化;设计一套知识抽取与清洗方法来获取所需的三元组形式知识,利用获得的知识三元组构建知识图谱,开发可视化的知识库管理系统。在改进的CEPRI36节点系统和东北电网上进行潮流计算收敛调整仿真实验,验证方法的可行性和有效性。