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Real-time electromagnetic transient simulation algorithm for integrated power systems based on network level and component level parallelism

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Science China(Technological Sciences) 2012年第11期55卷 3232-3241页

作者： chen laijun chen Ying MEI ShengWei State Key Laboratory of Control and Simulation of Power Systems and Generation Equipments(Department of Electrical Engineering Tsinghua University)Beijing 100084China

The analysis and simulation of power system are becoming more and more challenging as the complexity of system topology and components has been increased. In this paper, a hybrid parallel algorithm is proposed for the real-time electromagnetic transient simulation （EMTS） of integrated power systems containing multiphase machines. The proposed algorithm is com- posed of a novel network partition method called component level parallelization and the Multi-Area Thevenin Equivalent （MATE） method, which extends the flexibility of the network partition in parallel simulation. Moreover, several methods are developed to enhance the efficiency of the communication and computation. Power systems with up to 410 single-phase elec- trical nodes and 336 switches are simulated in a time step of 50 ~ts to validate the proposed algorithm.

关键词： EMTP multiphase machine network partition parallel computing power system real-time simulation

Research focuses and advance technologies of smart grid in recent years

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Chinese Science Bulletin 2012年第22期57卷 2879-2886页

作者： MEI ShengWei chen laijun State Key Laboratory of Control and Simulation of Power Systems and Generation Equipments Department of'Electrical EngineeringTsinghuaUniversityBeijing 100084China

The smart grid is attracting more and more attention in electrical engineering for its promising ***,huge challenges also exist in the implementations of the smart grid,such as high penetration of renewable energy resources,low carbon electricity and cyber-physical security,*** this paper,the latest progress of some research focuses and advance technologies in the development of smart grid is reviewed.

关键词：电网智能技术网络物理安全可再生能源电气工程渗透力

Risk Constrained Self-scheduling of AA-CAES Facilities in Electricity and Heat Markets:A Distributionally Robust Optimization Approach

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CSEE Journal of Power and Energy Systems 2024年第3期10卷 1159-1167页

作者： Zhiao Li laijun chen Wei Wei Shengwei Mei Department of Electrical Engineering Tsinghua UniversityBeijing 100084China New Energy(Photovoltaic)Industry Research Center Qinghai UniversityXining 810016China IEEE

Advanced adiabatic compressed air energy storage(AA-CAES)has the advantages of large capacity,long service time,combined heat and power generation(CHP),and does not consume fossil fuels,making it a promising storage technology in a low-carbon *** appropriate self-scheduling model can guarantee AA-CAES’s profit and attract ***,very few studies refer to the cogeneration ability of AA-CAES,which enables the possibility to trade in the electricity and heat markets at the same *** this paper,we propose a multimarket self-scheduling model to make full use of heat produced in *** volatile market price is modeled by a set of inexact distributions based on historical data through-***,the self-scheduling model is cast as a robust risk constrained program by introducing Stackelberg game theory,and equivalently reformulated as a mixed-integer linear program(MILP).The numerical simulation results validate the proposed method and demonstrate that participating in multienergy markets increases overall *** impact of uncertainty parameters is also discussed in the sensibility analysis.

关键词： Advanced adiabatic compressed air energy storage(AA-CAES) conditional value at risk(CVaR) distributionally robust optimization(DRO) heat market self-scheduling Stackelberg game

Capacity Allocation of Hybrid Power System with Hot Dry Rock Geothermal Energy,Thermal Storage,and PV Based on Game Approaches

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Journal of Modern Power Systems and Clean Energy 2023年第1期11卷 290-301页

作者： Yang Si laijun chen Xuelin Zhang Xiaotao chen Shengwei Mei Qinghai Key Lab of Efficient Utilization of Clean Energy(Tus-Institute for Renewable Energy) University of QinghaiXining 810016China State Key Laboratory of Control and Simulation of Power System and Power Generation Equipment(Electric Machinery Department Tsinghua University)Beijing 100084China Technical Institute of Physics and Chemistry Beijing 100190China IEEE

This study utilizes hot dry rock(HDR)geothermal energy,which is not affected by climate,to address the capacity allocation of photovoltaic(PV)-storage hybrid power systems(HPSs)in frigid plateau *** study replaces the conventional electrochemical energy storage system with a stable HDR plant assisted by a flexible thermal storage(TS)*** HPS consisting of an HDR plant,a TS plant,and a PV plant is *** approaches are introduced to establish the game pattern model of the proposed HPS as the *** annualized income of each player is used as the payoff ***,non-cooperative game and cooperative game approaches for capacity allocation are proposed according to the interests of each player in the proposed ***,the proposed model and approaches are validated by performing calculations for an HPS in the Gonghe Basin,Qinghai,China as a case *** results show that in the proposed non-cooperative game approach,the players focus only on the individual payoff and neglect the overall system *** proposed cooperative game approach for capacity allocation improves the flexibility of the HPS as well as the payoff of each game ***,the HPS can better satisfy the power fluctuation rate requirements of the grid and increase the equivalent firm capacity(EFC)of PV plants,which in turn indirectly guarantees the reliability of grid operation.

关键词： Capacity allocation equivalent firm capacity game theory hot dry rock hybrid power system

Flexible unbalanced control with peak current limitation for virtual synchronous generator under voltage sags

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Journal of Modern Power Systems and Clean Energy 2018年第1期6卷 61-72页

作者： Tianwen ZHENG laijun chen Yan GUO Shengwei MEI State Key Laboratory of Control and Simulation of Power Systems and Generation Equipments Department of Electrical Engineering Tsinghua University Qinghai Key Lab of Efficient Utilization of Clean Energy New Energy Photovoltaic Industry Research Center Qinghai University

Virtual synchronous generator(VSG)is gridfriendly for integrating distributed generations(DGs)since it can emulate the operation mechanism of traditional synchronous generator(SG).However,the traditional VSG control strategy,which is mainly suitable for balanced voltage conditions,may lead to power oscillations,current unbalance and even overcurrent under unbalanced voltage *** overcome this difficulty,a flexible unbalanced control with peak current limitation for VSG under unbalanced operating conditions is *** on the basic VSG control algorithm,the control strategy integrates two novel control modules,which are current reference generator(CRG)and power reference generator(PRG).The proposed control strategy can flexibly meet different operation demands,which includes current balancing,constant active or reactive *** the injected currents are kept within safety values for a better utilization of the VSG power ***,the experimental platform is *** results demonstrate the validness and effectiveness of the proposed control strategy.

关键词： Virtual synchronous generator Unbalanced control Current reference generator Power reference generator Voltage sags

Distributed Optimal Power Flow of DC Microgrids:A Penalty Based ADMM Approach

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CSEE Journal of Power and Energy Systems 2021年第2期7卷 339-347页

作者： Manshang Wang Yifan Su laijun chen Zhengming Li Shengwei Mei School of Electrical Information and Engineering Jiangsu UniversityZhenjiang 212013China.M.S.Wang is also with the State Grid Zhenjiang Power Supply CompanyZhenjiang 212001China

The popularity of direct current(DC)networks have made their optimal power flow(OPF)problem a hot *** the proliferation of distributed generation,the many problems of centralized optimization methods,such as single point failure and slow response speed,have led to utilization of measures such as distributed OPF *** OPF problem is non-convex,which makes it difficult to obtain an optimal *** second-order cone programming(SOCP)relaxation method is widely utilized to make the OPF problem *** is difficult to guarantee its exactness,especially when line constraints are *** paper proposes a penalty based ADMM approach using difference-of-convex programming(DCP)to solve the non-convex OPF problem in a distributed *** algorithm is composed of distributed x iteration,z iteration and A,/i ***,in the distributed z iteration,the active power flow injection equation of each line is formulated as a difference of two convex functions,and then the SOCP relaxation is given in a different *** the SOCP relaxation is inexact,a penalty item is added to drive the solution to be ***,an optimal solution can be obtained using a local nonlinear programming ***,simulations on a 14-bus system and the IEEE 123-bus system validate the effectiveness of the proposed approach.

关键词： DC microgrid,difference-of-convex programming optimal power flow second-order cone programming

Optimal dispatch of zero-carbon-emission micro Energy Internet integrated with non-supplementary fired compressed air energy storage system

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Journal of Modern Power Systems and Clean Energy 2016年第4期4卷 566-580页

作者： Rui LI laijun chen Tiejiang YUAN Chunlai LI Department of Electrical Engineering Tsinghua UniversityBeijing 100084China Department of Electrical Engineering Xinjiang UniversityUrumqi 830046China Qinghai Electrical Power Research Institute Qinghai Electric Power CorporationXining 810008China

To utilize heat and electricity in a clean and integrated manner,a zero-carbon-emission micro Energy Internet(ZCE-MEI) architecture is proposed by incorporating non-supplementary fired compressed air energy storage(NSF-CAES) hub.A typical ZCE-MEI combining power distribution network(PDN) and district heating network(DHN) with NSF-CAES is considered in this ***-CAES hub is formulated to take the thermal dynamic and pressure behavior into account to enhance dispatch flexibility.A modified Dist Flow model is utilized to allow several discrete and continuous reactive power compensators to maintain voltage quality of *** operation of the ZCE-MEI is firstly modeled as a mixed integer nonlinear programming(MINLP).Several transformations and simplifications are taken to convert the problem as a mixed integer linear programming(MILP)which can be effectively solved by CPLEX.A typical test system composed of a NSF-CAES hub,a 33-bus PDN,and an 8-node DHN is adopted to verify the effectiveness of the proposed ZCE-MEI in terms of reducing operation cost and wind curtailment.

关键词： Zero-carbon-emission micro Energy Internet Non-supplementary fired compressed air energy storage District heating network Power distribution network Dist Flow Mixed integer linear programming

An Efficient Decomposition Method for Bilevel Energy Storage Arbitrage Problem

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CSEE Journal of Power and Energy Systems 2022年第2期8卷 652-658页

作者： Danman Wu Tengyun Qi Wei Wei Jianping Liu laijun chen Shengwei Mei the State Key Laboratory of Power Systems Department of Electrical EngineeringTsinghua UniversityBeijing 100084China China Three Gorges Renewables(Group)Co. Ltd.Beijing 100053China China Three Gorges Corporation Beijing 100038China New Energy Industry Research Center Qinghai UniversityXining 810016China

With the reduction of cost,large-capacity energy storage unit is playing an increasingly important role in modern power *** a merchant energy storage unit participates in the power market,its arbitrage problem can be modeled via a bilevel *** lower-level problem simulates power market clearing and gives the nodal price,based on which the upperlevel problem maximizes the arbitrage profit of energy *** solve this bilevel problem,the conventional method replaces the lower level problem with its KKT optimality conditions and further performs ***,because the size of the market clearing problem grows with the scale of the power system and the number of periods,the resulting MILP(mixed-integer linear program)is very challenging to *** paper proposes a decomposition method to address the bilevel energy storage arbitrage ***,the locational marginal price at the storage connection node is expressed as a piecewise constant function in the storage bidding strategy,so the market clearing problem can be ***,the storage bidding problem is formulated as a mixed-integer linear program,which contains only a few binary *** experiments validate the proposed method is exact and highly efficient.

关键词： Bilevel program energy storage nodal price mixed-integer linear program strategic bidding

Optimal scheduling of zero-carbon park considering variational characteristics of hydrogen energy storage systems

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Global Energy Interconnection 2024年第5期7卷 603-615页

作者： Jun Yin Heping Jia laijun chen Dunnan Liu Shengwei Mei Sheng Wang School of Energy and Electrical Engineering Qinghai UniversityXining 810016P.R.China School of Economics and Management North China Electric Power UniversityBeijing 102206P.R.China Department of Electrical Engineering Tsinghua UniversityBeijing 100084P.R.China School of Engineering Newcastle UniversityNewcastle-upon-TyneNE17RUUK

Zero-carbon parks have broad prospects in carbon *** an energy hub,hydrogen energy storage plays an important role in zero-carbon ***,the nonlinear characteristics of hydrogen energy storage systems(HESSs)have a significant impact on the system ***,considering the variable working condition characteristics of HESSs,a hybrid operation method is proposed for HESS,to support the efficient and economic operation of zero-carbon parks,By analyzing the operating principle of a zero-carbon park with HESS,the system structure framework and variable condition linearization model of the equipment in HESS are ***,considering the energy output characteristics of hydrogen energy storage equipment under variable working conditions,a multimodule hybrid operation strategy is proposed for electrolytic and fuel cells,effectively meeting the thermoelectric load demand of zero-carbon parks in different ***,the economy of the proposed hybrid operation strategy was verified in typical scenarios,using a zero-carbon park embedded with a HESS.

关键词： Zero-carbon park Variational characteristics Hydrogen energy storage Hybrid operation