检索结果-南通市图书馆

维普期刊数据库博看期刊

基于全纯函数嵌入的电热综合能源系统动态能流分析方法

在线全文

学校读者我要写书评

暂无评论

电气传动 2024年第8期54卷 57-67页

作者：陈思思李志刚郑杰辉华南理工大学电力学院广东广州510640

兼顾高精度与高计算效率的能流分析方法是模拟热力与电力耦合系统的运行、分析其相互影响的基础工具。传统迭代型数值解法计算速度慢、针对大规模问题的可计算性差,且只能获取离散时间序列下的状态变量值。另外,传统的电网潮流与热网动... 详细信息

兼顾高精度与高计算效率的能流分析方法是模拟热力与电力耦合系统的运行、分析其相互影响的基础工具。传统迭代型数值解法计算速度慢、针对大规模问题的可计算性差,且只能获取离散时间序列下的状态变量值。另外,传统的电网潮流与热网动态潮流的数值解法不兼容,在进行动态能量流分析时往往采用交替迭代求解的方式,使得误差在迭代过程中传播。针对上述问题,提出一种基于全纯函数嵌入的电热综合能源系统动态能流分析方法,通过递归计算获得系统状态变量关于时间的连续解析函数,并在计算过程中采用电网和热网统一求解的方式,实现对电热综合能源系统的求解。仿真结果显示,与Matlab求解器相比,计算结果的最大误差在3%以内,计算速度提升30%以上;与传统迭代型数值算法相比,该算法能够计算出动态过程中任意时刻的系统状态。

关键词：电热综合能源系统能流分析热力动态全纯函数嵌入

维普期刊数据库博看期刊

Many-objective Optimization Method Based on Dimension Reduction for Operation of Large-scale Cooling Energy Systems

在线全文

学校读者我要写书评

暂无评论

CSEE Journal of Power and Energy Systems 2023年第3期9卷 884-895页

作者： Peng Zhu Lixiao Wang Cuiqing Wu Jinyu Yu Zhigang Li jiehui zheng Qing-Hua Wu School of Electric Power Engineering South China University of TechnologyGuangzhou 510640China

Large-scale cooling energy system has developed well in the past ***,its optimization is still a problem to be tackled due to the nonlinearity and large scale of existing *** the scale of problems without oversimplifying the actual system model is a big challenge *** paper proposes a dimension reduction-based many-objective optimization(DRMO)method to solve an accurate nonlinear model of a practical large-scale cooling energy *** the first stage,many-objective and many-variable of the large system are pre-processed to reduce the overall scale of the optimization *** relationships between many objectives are analyzed to find a few representative *** control variables are extracted to reduce the dimension of variables and the number of equality *** the second stage,the manyobjective group search optimization(GSO)method is used to solve the low-dimensional nonlinear model,and a Pareto-front is *** the final stage,candidate solutions along the Paretofront are graded on many-objective levels of system *** candidate solution with the highest average utility value is selected as the best running *** are carried out on a 619-node-614-branch cooling system,and results show the ability of the proposed method in solving large-scale system operation problems.

关键词： Dimension reduction group search optimization large-scale cooling energy system many-objective optimization

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

电力系统交流潮流线性化方法研究综述

山东电力技术 2024年第4期51卷 12-26页

作者：赖海鹏李志刚于金雨郑杰辉华南理工大学电力学院广东广州510641

电力系统潮流方程具有显著的非线性特性,针对大规模电力系统的潮流计算易出现计算结果不收敛的现象。近年来,国内外文献涌现出大量适用于电力系统交流潮流计算的线性化潮流模型,但缺乏对经典线性化潮流模型分离变量过程的系统性梳理与... 详细信息

电力系统潮流方程具有显著的非线性特性,针对大规模电力系统的潮流计算易出现计算结果不收敛的现象。近年来,国内外文献涌现出大量适用于电力系统交流潮流计算的线性化潮流模型,但缺乏对经典线性化潮流模型分离变量过程的系统性梳理与总结以及对经典线性化潮流模型计算性能的数值比较。首先梳理了目前电力系统经典线性化潮流模型的主要思路,对各种线性化潮流模型分离变量的过程进行分析与总结。然后对比了线性化潮流模型的相同性及其在输电网和配电网应用上的差异,并从计算误差、计算时间和灵敏度等方面对比了各线性化潮流模型的性能。最后根据每一种线性化潮流模型的优缺点,对各线性化潮流模型的适用场景进行了总结及展望。

关键词：电力系统线性化潮流计算误差分析

Stochastic optimization of cost-risk for integrated energy system considering wind and solar power correlated

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2019年第6期7卷 1472-1483页

作者： jiehui zheng Yanni KOU Mengshi LI Qinghua WU School of Electric Power Engineering South China University of TechnologyGuangzhou 510640China

Due to the growing penetration of renewable energies(REs)in integrated energy system(IES),it is imperative to assess and reduce the negative impacts caused by the uncertain *** this paper,an unscented transformation-based mean-standard(UT-MS)deviation model is proposed for the stochastic optimization of cost-risk for IES operation considering wind and solar power *** unscented transformation(UT)sampling method is adopted to characterize the uncertainties of wind and solar power considering the correlated relationship between *** on the UT,a mean-standard(MS)deviation model is formulated to depict the trade-off between the cost and risk of stochastic optimization for the IES optimal operation *** the UT-MS model is tackled by a multi-objective group search optimizer with adaptive covariance and Levy flights embedded with a multiple constraints handling technique(MGSO-ACL-CHT)to ensure the feasibility of Peratooptimal ***,a decision-making method,improved entropy weight(IEW),is developed to select a final operation point from the set of Perato-optimal *** order to verify the feasibility and efficiency of the proposed UT-MS model in dealing with the uncertainties of correlative wind and solar power,simulation studies are conducted on a test *** results show that the UT-MS model is capable of handling the uncertainties of correlative wind and solar power within much less samples and less computational ***,the MGSOACL-CHT and IEW are also demonstrated to be effective in solving the multi-objective UT-MS model of the IES optimal operation problem.

关键词： Integrated energy system Renewable energies Unscented transformation Mean-standard deviation Multi-objective optimization Decision making

Decentralized State Estimation of Combined Heat and Power System Considering Communication Packet Loss

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2020年第4期8卷 646-656页

作者： Wenjian zheng Zhigang Li Xinyu Liang jiehui zheng Q.H.Wu Fan Hu School of Electric Power Engineering South China University of TechnologyGuangzhou 510641China Guangzhou Power Supply Guangdong Power Grid Co.Ltd.Guangzhou 510000China

In order to obtain an accurate state estimation of the operation in the combined heat and power system,it is necessary to carry out state *** to the limited information sharing among various energy systems,it is practical to perform state estimation in a decentralized ***,the possible communication packet loss is seldomly considered among various energy *** paper bridges this gap by proposing a relaxed alternating direction method of multiplier *** can also improve the computation efficiency compared with the conventional alternating direction of the multiplier *** studies of two test systems are carried out to show the validity and superiority of the proposed algorithm.

关键词： Alternating direction of multiplier algorithm combined heat and power system communication packet loss decentralized optimization state estimation

Optimal Operation of Integrated Energy Systems Subject to Coupled Demand Constraints of Electricity and Natural Gas

在线全文

学校读者我要写书评

暂无评论

CSEE Journal of Power and Energy Systems 2020年第2期6卷 444-457页

作者： Yingjie Qin Lilan Wu jiehui zheng Mengshi Li Zhaoxia Jing Q.H.Wu Xiaoxin Zhou Feng Wei School of Electric Power Engineering South China University of TechnologyGuangzhou 510641China China Electric Power Research Institute Beijing 100192China

This paper proposes a hybrid multi-objective optimization and game-theoretic approach(HMOGTA)to achieve the optimal operation of integrated energy systems(IESs)consisting of electricity and natural gas(E&G)utility networks,multiple distributed energy stations(DESs),and multiple energy users(EUs).The HMOGTA aims to solve the coordinated operation strategy of the electricity and natural gas networks considering the demand characteristics of DESs and *** the HMOGTA,a hierarchical Stackelberg game model is developed for generating equilibrium strategies of DESs and EUs in each district energy network(DEN).Based on the game results,we obtain the coupling demand constraints of electricity and natural gas(CDCENs)which reflect the relationship between the amounts and prices of electricity and cooling(E&C)that DESs purchase from utility ***,the minimization of conflicting costs of E&G networks considering the CDCENs are solved by a multi-objective optimization method.A case study is conducted on a test IES composed of a 20-node natural gas network,a modified IEEE 30-bus system,and 3 DENs,which verifies the effectiveness of the proposed HMOGTA to realize fair treatment for all participants in the IES.

关键词： Coupling demand constraints of electricity and natural gas coupling demand characteristics integrated energy system multi-objective optimization Stackelberg game

Reserve Constrained Dynamic Economic Dispatch with Valve-point Effect:A Two-stage Mixed Integer Linear Programming Approach

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CSEE Journal of Power and Energy Systems 2017年第2期3卷 203-211页

作者： Zhaolong Wu Jianying Ding Q.H.Wu Zhaoxia Jing jiehui zheng School of Electric Power Engineering South China University of TechnologyGuangzhou 510641China Power Generation Commercial Division Guangdong Yudean Group Co.LTDGuangzhou 510630China

This paper proposes a deterministic two-stage mixed integer linear programming(TSMILP)approach to solve the reserve constrained dynamic economic dispatch(DED)problem considering valve-point effect(VPE).In stage one,the nonsmooth cost function and the transmission loss are piecewise linearized and consequently the DED problem is formulated as a mixed integer linear programming(MILP)problem,which can be solved by commercial *** stage two,based on the solution obtained in stage one,a range compression technique is proposed to make a further exploitation in the subspace of the whole solution *** to the linear approximation of the transmission loss,the solution obtained in stage two dose not strictly satisfies the power balance ***,a forward procedure is employed to eliminate the *** simulation results on four test systems show that TSMILP makes satisfactory performances,in comparison with the existing methods.

关键词： Dynamic economic dispatch mixed integer linear programming valve-point effect spinning reserve transmission loss non-convex optimization

Coordinated Scheduling of Energy Resources for Distributed DHCs in an Integrated Energy Grid

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CSEE Journal of Power and Energy Systems 2015年第1期1卷 95-103页

作者： Qinghua Wu jiehui zheng Zhaoxia Jing School of Electric Power Engineering.South China University of Technology Guangzhou510641.P.R.China

As more and more distributed renewable energy resources connected to electric power grids,the conventional power system evolves into an integrated energy grid(IEG)in order to satisfy various types of energy *** paper proposes a model of the coordinated scheduling of energy resources(CSoERs)for distributed district heating and cooling systems(DHCs)in an *** model takes into consideration both the dispatchable grid-connected generators and distributed renewable energy resources,such as wind energy,solar energy and natural *** objective is to minimize the operation costs in the IEG in order to satisfy not only the electrical loads but also the heating loads and cooling ***,an energy storage system for heating loads and cooling loads is also developed in the DHCs to improve the operation reliability in the distributed *** simulation studies are carried out to verify the effectiveness of the CSoERs under two different operation scenarios:grid-connected scenario and stand-alone *** results demonstrate that the performance of the CSoERs contributes to significant energy saving and reliability operation in both grid-connected scenario and standalone scenario in the IEG.

关键词： Coordinated power scheduling district heating and cooling energy storage system integrated energy system renewable resources

电-气综合能源系统的综合灵敏度指标构建方法和应用研究

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

全球能源互联网 2022年第2期5卷 118-126页

作者：李维维钱瞳唐文虎郑杰辉华南理工大学电力学院广东省广州市510640

燃气轮机和电转气(power-to-gas,P2G)技术的日益成熟逐渐加深电力系统和天然气系统的耦合程度。在电-气综合能源系统的联合运行中,子系统的扰动会通过耦合元件跨系统传播,从而影响整个系统的安全运行。为研究电-气综合能源系统中子系统... 详细信息

燃气轮机和电转气(power-to-gas,P2G)技术的日益成熟逐渐加深电力系统和天然气系统的耦合程度。在电-气综合能源系统的联合运行中,子系统的扰动会通过耦合元件跨系统传播,从而影响整个系统的安全运行。为研究电-气综合能源系统中子系统间的相互影响,基于牛顿拉夫逊法建立了统一潮流模型并实现了联合求解,其中天然气系统的状态变量采用牛顿下山法更新,一定程度上避免了初值敏感性。随后,基于统一潮流模型构建了节点电压/节点气压-注入节点功率综合灵敏度指标,同时获取了规范化的电压/气压灵敏度矩阵,可以定量评估系统多种扰动的共同影响并分析耦合系统的相互作用机理。算例分析验证了潮流算法和所提指标的有效性,并讨论了燃气轮机和P2G装置耦合作用下子系统间的影响关系。

关键词：电-气综合能源系统统一潮流模型牛顿下山法综合灵敏度指标