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| 1 | Multi-objective Transmission Expansion Planning Considering Life Cycle Cost显示文摘为克服目前全寿命周期成本(life cycle cost,LCC)技术的应用局限于设备运行或维护阶段的不足,针对输电网整体建立一个3维LCC层级模型,包括时间维度、元件维度和费用维度。费用维度进一步分解为设备级、系统级、外部环境成本。研究了以可靠性为中心的维护手段的应用对维护成本的影响,利用电量不足期望值计算故障成本。在此基础上,对风电等4种不确定因素进行建模,建立以LCC成本最小和切负荷量最小为多目标的输电网机会约束规划模型。采用正态边界交点算法联合改进小生境遗传算法,对模型有效求解。最后,分别对18节点系统和77节点系统进行算例分析。研究结果给出了帕累托解集及推荐的最优规划方案;此外,LCC费用分解图表明了各费用的比重和影响,有利于指导未来资产管理。 | LIU Lu CHENG Haozhong MA Zeliang YAO Liangzhong BAZARGAN Masoud | 2012 | 中国电机工程学报2012，32，22： | 31 |
| 2 | Wind turbines output power smoothing using embedded energy storage systems显示文摘The ability of an energy storage system to improve the performance of a wind turbine(WT)with a fully rated converter was evaluated,where the energy storage device is embedded in the direct current(dc)link with a bidirectional dc/dc converter.Coordinated dc voltage control design of the line-side converter and the energy storage dc/dc converters was proposed using a common dc voltage measurement for smoothing the output power.A transfer function and Bode diagram were introduced to analyze the system performance with different control parameters.MATLAB/Simulink simulations are presented to demonstrate the effectiveness of the proposed methods.It was found that the proposed methods smooth the power output from the WT to the grid and thus improve the quality of the generated power. | Guoyi XU Lie XU Liangzhong YAO | 2013 | Journal of Modern Power Systems and Clean Energy2013，1，1： | 7 |
| 3 | Coordinating EV Charging via Blockchain显示文摘The increasing electric vehicle(EV) penetration in a distribution network triggers the need for EV charging coordination. This paper firstly proposes a hierarchical EV charging coordination model and an algorithm based on Lagrangian relaxation. A barrier to the implementation of the coordination algorithm is that there usually does not exist a reliable coordinator of charging stations. This paper shows that an unreliable coordinator may collude with some charging stations and behave dishonestly by disobeying the coordination algorithm. Thus, the collusion coalition can gain more profits while lowering the profits of others and the total social welfare. To provide reliable coordination of charging stations, a novel blockchain-based coordination platform via Ethereum is established, including a coordination structure and a smart contract. A mathematical analysis is given to show that the proposed platform can mitigate the collusion behaviors in the coordination. Simulation results show the consequence of collusion and how blockchain can prevent the collusion. | Jian Ping Zheng Yan Sijie Chen Liangzhong Yao Minhui Qian | 2020 | Journal of Modern Power Systems and Clean Energy2020，8，3： | 7 |
| 4 | Wind power forecasting error-based dispatch method for wind farm cluster显示文摘With the technical development of wind power forecasting,making wind power generation schedule in power systems become an inevitable tendency.This paper proposes a new dispatch method for wind farm(WF)cluster by considering wind power forecasting errors.A probability distribution model of wind power forecasting errors and a mathematic expectation of the power shortage caused by forecasting errors are established.Then,the total mathematic expectation of power shortage from all WFs is minimized.Case study with respect to power dispatch in a WF cluster is conducted using forecasting and actual wind power data within 30 days from sites located at Gansu Province.Compared with the variable proportion method,the power shortage of the WF cluster caused by wind power forecasting errors is reduced.Along with the increment of wind power integrated into power systems,the method positively influences future wind power operation. | Ning CHEN Qi WANG Liangzhong YAO Lingzhi ZHU Yi TANG Fubao WU Mei CHEN Ningbo WANG | 2013 | Journal of Modern Power Systems and Clean Energy2013，1，1： | 3 |
| 5 | Review of Operational Control Strategy for DC Microgrids with Electric-hydrogen Hybrid Storage Systems显示文摘Hydrogen production from renewable energy sources(RESs)is one of the effective ways to achieve carbon peak and carbon neutralization.In order to ensure the efficient,reliable and stable operation of the DC microgrid(MG)with an electric-hydrogen hybrid energy storage system(ESS),the operational constraints and static dynamic characteristics of a hydrogen energy storage system(HESS)needs to be fully considered.First,different hydrogen production systems,using water electrolysis are compared,and the modeling method of the electrolyzer is summarized.The operational control architecture of the DC MG with electric-hydrogen is analyzed.Combined with the working characteristics of the alkaline electrolyzer,the influence of hydrogen energy storage access on the operational mode of the DC MG is analyzed.The operational control strategies of the DC MG with electric-hydrogen hybrid ESS are classified and analyzed from four different aspects:static and dynamic characteristics of the hydrogen energy storage system,power distribution of the electric-hydrogen hybrid ESS and the efficiency optimization of hydrogen energy storage.Finally,the advantages of a modular hydrogen production system(HPS)are described,and the technical problems and research directions in the future are discussed. | Wei Pei Xue Zhang Wei Deng Chenghong Tang Liangzhong Yao | 2022 | CSEE Journal of Power and Energy Systems2022，8，2： | 3 |
| 6 | Protection of large partitioned MTDC Networks Using DC-DC converters and circuit breakers显示文摘This paper proposes a DC fault protection strategy for large multi-terminal HVDC(MTDC)network where MMC based DC-DC converter is configured at strategic locations to allow the large MTDC network to be operated interconnected but partitioned into islanded DC network zones following faults.Each DC network zone is protected using either AC circuit breakers coordinated with DC switches or slow mechanical type DC circuit breakers to minimize the capital cost.In case of a DC fault event,DC-DC converters which have inherent DC fault isolation capability provide‘firewall’between the faulty and healthy zones such that the faulty DC network zone can be quickly isolated from the remaining of the MTDC network to allow the healthy DC network zones to remain operational.The validity of the proposed protection arrangement is confirmed using MATLAB/SIMULINK simulations. | Md Habibur Rahman Lie Xu Liangzhong Yao | 2016 | Protection and Control of Modern Power Systems2016，1，1： | 2 |
| 7 | Dynamic VAR planning methodology to enhance transient voltage stability for failure recovery显示文摘In recent years, failure recovery after faults is concerned and discussed worldwide as an important and hot topic. Facing the challenge of heavy loads and ultrahigh voltage transmission, it's urgent to propose some solutions to enhance transient voltage stability for failure recovery. Therefore, a novel dynamic volt ampere reactive(VAR) planning methodology is proposed in this paper to help failure recovery and improve transient voltage stability after contingencies. First, a transient voltage fluctuation(TVF) index is proposed to evaluate transient voltage condition after faults. Then dynamic compensationsensitivity is presented for searching the best candidate locations. Following that, the dynamic VAR planning methodology based on an improved Tent chaos multi-objective algorithm is discussed in detail. There are two optimization objects in the optimization. One is to minimize TVF to enhance transient voltage stability for failure recovery. And the other optimization is to minimize dynamic VAR investment cost and operation cost. Finally,IEEE 39 power system and a practical power system are analyzed and discussed. The proposed dynamic VAR planning methodology can support enough reactive power for failure recovery. With the least SVC planning amount and the power loss cost, it can greatly decrease the system TVF index and enhance the transient voltage stability. It's proved that the proposed dynamic VAR planning optimization is effective and helpful for safety operation of power system. | Di YANG Haozhong CHENG Zeliang MA Liangzhong YAO Zhonglie ZHU | 2018 | Journal of Modern Power Systems and Clean Energy2018，6，4： | 2 |
| 8 | Planning for distributed wind generation under active management mode显示文摘 | Jietan Zhang Hong Fan Wenting Tang Maochun Wang Haozhong Cheng Liangzhong Yao | 2013 | International Journal of Electrical Power and Energy Systems2013，，： | 2 |
| 9 | Optimal Frequency Regulation Based on Characterizing the Air Conditioning Cluster by Online Deep Learning显示文摘The air conditioning cluster(ACC)is a potential candidate to provide frequency regulation reserves.However,the effective assessment of the ACC willing reserve capacity is often an obstacle for existing demand response(DR)programs,influenced by incentive prices,temperatures,etc.In this paper,the complex relationship between the ACC willing reserve capacity and its key influence factors is defined as a demand response characteristic(DRC).To learn about DRC along with real-time frequency regulation,an online deep learning-based DRC(ODLDRC)modeling methodology is designed to continuously retrain the deep neural network-based model.The ODL-DRC model trained by incoming new data does not require massive historical training data,which makes it more time-efficient.Then,the coordinate operation between ODL-DRC modeling and optimal frequency regulation(OFR)is presented.A robust decentralized sliding mode controller(DSMC)is designed to manage the ACC response power in primary frequency regulation against any ACC response uncertainty.An ODL-DRC model-based OFR scheme is formulated by taking the learning error into consideration.Thereby,the ODL-DRC model can be applied to minimize the total operational cost while maintaining frequency stability,without waiting for a well-trained model.The simulation cases validate the superiority of the OFR based on characterizing the ACC by online learning,which can capture the real DRC and simultaneously optimize the regulation performance with strong robustness against any ACC response uncertainty and learning error. | Yeyan Xu Liangzhong Yao Siyang Liao Yaping Li Jian Xu Fan Cheng | 2022 | CSEE Journal of Power and Energy Systems2022，8，5： | 2 |
| 10 | Small Signal Stability Analysis with Penetration of Grid-connected Wind Farm of PMSG Type显示文摘The impacts of large-scale grid-connected wind farm on direct-driven permanent magnet synchronous generator(PMSG)type are discussed on the small signal stability performances of power systems.Firstly,a simplified practical model of wind farm of PMSG type is derived for analyzing small signal stability.The rotor-fluxoriented control strategy is applied to the modelling of PMSG.Secondly,the framework of small signal stability analysis incorporating wind farm of PMSG type is built.Finally,the different simulation scenarios based on the IEEE 3-generator-9-bus test system as benchmark are designed to conduct the eigenvalue analysis and to assess the impacts of wind farm of PMSG type on power system small signal stability.Some conclusions are drawn with simulation results. | Shi, Libao Kang, Li Ni, Yixin Yao, Liangzhong Bazargan, Masoud | 2012 | 电力系统自动化2012，36，8： | 2 |
| 11 | The design and fault ride through control of un-interrupted DC-DC Autotransformer显示文摘This paper proposed a novel type of DC-DC converter, termed as un-interrupted DC Autotransformer(un-interrupted DC AUTO), which has the capability to ride through DC fault on either side of the converter without blocking any devices. Besides that, the adequately designed converter retains the advantages of DC AUTO technology, namely reduced investment cost and transmission loss. To begin with, the topology and basic attributes of the un-interrupted DC AUTO are illustrated. Then the design goals and the corresponding design procedures are analyzed. Furthermore, an effective control system is proposed to enable the converter steady operation during both normal and faulted conditions. Finally, a 1000 MW ±320 kV/±640 kV test system is built on PSCAD/EMTDC platform to verify the technical feasibility of the proposed converter and the effectiveness of the control strategy. | LI MengBo XIANG Wang ZUO WenPing YAO LiangZhong LIN WeiXing WEN JinYu | 2018 | Science China(Technological Sciences)2018，61，12： | 2 |
| 12 | DC voltage variation based autonomous control of DC microgrids显示文摘 | Chen Dong Xu Lie Yao Liangzhong | 2013 | IEEE Transactions on Power Delivery2013，28，2： | 1 |
| 13 | Grid integration of large DFIG-based wind farms using VSC transmission显示文摘 | Xu Lie Yao Liangzhong Sasse C | 2007 | IEEE Trans on Power Systems2007，22，3： | 1 |
| 14 | Investigation on limit surfaces in space spanned by generation parameter显示文摘 | Xiong Ning Cheng Haozhong Yao Liangzhong | | 0，，03： | 1 |
| 15 | Design and operation of a hybrid modular multilevel converter 显示文摘 | Zeng Rong Xu Lie Yao Liangzhong | 2014 | IEEE Transactions on Power Electronics2014，30，3： | 1 |
| 16 | DC Voltage Variation Based Autonomous Control of DC Microgrids显示文摘 | Chen Dong Xu Lie Yao Liangzhong | 2013 | IEEE TRANSACTIONS ON POWER DELIVERY2013，28，2： | 1 |
| 17 | Grid integration of large DFIG-based wind farms using VSC transmission 显示文摘 | Xu Lie Yao Liangzhong Sasse Christian | 2007 | IEEE Transactions on Power Systems2007，22，3： | 1 |
| 18 | DC voltage variation based autonomous control of DC microgrids显示文摘 | Chen Dong Xu Lie Yao Liangzhong | 2013 | IEEE Transactions on Power Delivery2013，28，2： | 1 |
| 19 | Participation of large-scale wind power generation in power system frequency regulation显示文摘The initiative participation of wind power generators in power system frequency regulation is an inevitable demand to ensure power system safe operation with large-scale wind power integration.However,it is principally difficult for conventional wind turbines to participate in power system frequency regulation.For this reason,solution to this problem is becoming a hot topic in the current studies.This paper systematically reviews the relevant research progresses in the control strategies and the capability assessment of using wind power generators in the power system frequency regulation,including the comparing among the emulating inertia control,the droop control,the rotor speed control,the pitch angle control and the coordinated control.Also,future research in this area is pointed out in the paper. | SUN HaiShun LIU Ju WEN JinYu CHENG ShiJie LUO Cheng YAO LiangZhong | 2013 | Chinese Science Bulletin2013，58，36： | 1 |
| 20 | Grid integration of large DFIG-based wind farms using VSC transmission显示文摘 | Xu Lie Yao Liangzhong Sasse Christian | 2007 | IEEE Transactions on Power Systems2007，22，3： | 1 |
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