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2017 IEEE Conference on energy Internet and energy System Integration, EI2 2017

作者： Li, Zewen Bie, Zhaohong Han, Zifen Li, Xiaofei Zhi, Yong Zhang, Yankai State Key Laboratory of Electrical Insulation and Power Equipment Shaanxi Key Laboratory of Smart Grid Xi'an Jiaotong University Xi'an China State Grid Gansu Electric Power Company Lanzhou China State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems China Electric Power Research Institute Beijing China Electric Power Research Institute State Grid Gansu Electric Power Company Lanzhou China

ISBN: (纸本)9781538614273

Hydropower is an important part of energy internet, as a principal type of sustainable energy. The promotion of hydropower may help to improve the power source structure and improves the safety, reliability and flexibility of the power system. However, the increasing congestion of the regional hydropower accommodation limits the wider use of hydropower. In this paper, an index system is developed to assess the regional hydropower accommodation. On this basis, an analysis method is proposed to find out the specific reasons of the congestion and the improvement measures by analyzing the relevance of source-load characters and delivery flowgate. The method is proved to be universal and practical through a case study in Western China where the hydropower is the dominant energy. The study is capable to provide necessary suggestions to the safety operation and planning of regional power system and has engineering application value. © 2017 IEEE.

关键词： Internet of energy

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Research on Reduction of Solar Power Curtailment with Grid Connected energy storage System Based on Time-Series Production Simulation

Research on Reduction of Solar Power Curtailment with Grid C...

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The 9th Asia-Pacific Power and energy Engineering Conference (APPEEC 2017)

作者： S.Ma Y.P.Xu X.F.Li Y.F.Wang N.Zhang Y.R.Xu State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute Qinghai Electric Power Dispatch and Control Centre

Due to the variable output of renewable energy(RE) generation, difficulties of dispatching RE for power system operators could not be avoided. One of possible solutions is the energy storage technology, especially the battery storage system. The large-scale energy storage system is available to support power system reliable flexibility for load following and system frequency regulation. In this paper, the bottlenecks of large-scale solar power generation dispatching and operation in Qinghai grid are discussed, and a new PV-energy storage coordinated dispatching method is proposed for reduction of PV curtailment in Qinghai. Moreover, the validation based on the time-series production simulation is provided using real data from Qinghai. The results indicate that the proposed method can effectively decrease the curtailment of solar power and future vision of large-scale solar power coordinated operation with energy storage system is also presented.

关键词： Solar power curtailment energy storage time-series production simulation

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Power in the loop real time simulation platform for renewable energy generation

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IOP Conference Series: Earth and Environmental Science 2018年第5期121卷

作者： Yang Li Wenhui Shi Xing Zhang Guoqing He State Key Laboratory of Control and Operation of Renewable Energy and Storage Systems China Electric Power Research Institute (CEPRI) Beijing China.

Nowadays, a large scale of renewable energy sources has been connecting to power system and the real time simulation platform is widely used to carry out research on integration control algorithm, power system stability etc. Compared to traditional pure digital simulation and hardware in the loop simulation, power in the loop simulation has higher accuracy and degree of reliability. In this paper, a power in the loop analog digital hybrid simulation platform has been built and it can be used not only for the single generation unit connecting to grid, but also for multiple new energy generation units connecting to grid. A wind generator inertia control experiment was carried out on the platform. The structure of the inertia control platform was researched and the results verify that the platform is up to need for renewable power in the loop real time simulation.

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Study on the influence of PV power generation model parameter variation on power system

Study on the influence of PV power generation model paramete...

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IEEE Conference on energy Internet and energy System Integration (EI2)

作者： Hualing Han Linan Qu Lingzhi Zhu Ning Chen China Electric Power Research Institute China State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research

ISBN: (纸本)9781538614280

This paper focuses on the influence of PV power plant model and parameters on the calculation of safety and stability of power system. Based on the actual situation of Xinjiang power system in 2016, this paper does research on the influence of PV model parameters on system frequency stability, power angle stability and voltage stability under the condition of PV access in high permeability was studied.

关键词： Power system stability Photovoltaic systems Stability criteria Voltage control

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Photovoltaic Power Smoothing by BESS Based on EMD with Wavelet Analysis

Photovoltaic Power Smoothing by BESS Based on EMD with Wavel...

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2017 International Electrical and energy Conference (CIEEC 2017)

作者： Linjun Shi Ladier Fa Chenyu Zhao Feng Wu Weiguo He Chun Wang Xiaohui Xu IEEE College of Energy and Electrical Engineering HoHai University State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute

In order to prevent the adverse effects of Photovoltaic(PV) power fluctuations on power systems,a battery energy storage system(BESS) was *** it is especially important to determine the dispatched PV power so that sizing of BESS can be utilized *** present,the main ways to get the dispatched PV power are low-pass filter and spectrum compensation method,which have some *** this paper a method that combines empirical mode decomposition(EMD) with wavelet analysis(WA) is proposed to get the dispatched PV power which is satisfied with the requirements of PV power *** on the dispatched of PV output,the minimum sizing of storage energy is determined under different state-of-charging(SOC) of the battery and *** the sizing of BESS done by the traditional low-pass filter smoothing method,the effectiveness of the proposed method has been verified in a case study.

关键词： Photovoltaic output Sizing energy storage capacity Empirical mode decomposition(EMD) Wavelet analysis

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Impact of series compensation on operation performance of large-scale PV plants

Impact of series compensation on operation performance of la...

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6th International Conference on renewable Power Generation

作者： Lu, Guofei Miao, Miao Yu, Xiao Liu, Chao Li, Yan Chen, Wuhui School of Electrical and Information Engineering Jiangsu University Zhenjiang Jiangsu212013 China State Grid Qinghai Economic Research Institute Xining810008 China State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems China Electric Power Research Institute Beijing100192 China

Application of series compensation transmission lines to enhance the long-distance transmission capability of photovoltaic (PV) plants is the most economical technical measure. To investigate the impact of series compensation on operating performance of large-scale PV plants, the simulation research is performed in this study. The detailed model of large-scale PV plants connected to the grid through series compensated lines is developed using power systems computer aided design (PSCAD)/electromagnetic transients inccluding DC (EMTDC) software. Using the detailed model, the performances of active and reactive power outputs, voltage and current profiles of PV plants are investigated for different levels of series compensation and strengths of AC system during short-circuit faults. The simulation results show that series compensation and strong AC system can effectively improve the transient operation performance of the PV power plant. With the increase of the series compensation degree and the strength of AC system, the fault ride-through performance of PV plants is improved. © 2017 Institution of Engineering and Technology. All rights reserved.

关键词： Reactive power

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Long-term wind accommodation of interconnected power grids via HVDC tie-line based on aggregate unit model

Long-term wind accommodation of interconnected power grids v...

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2017 IEEE Conference on energy Internet and energy System Integration, EI2 2017

作者： Zeng, Fangdi Bie, Zhaohong Han, Zifen Li, Xiaofei Zhi, Yong Zhang, Yankai School of Electrical Engineering Xi'an Jiaotong University Xi'an China State Grid Gansu Electric Power Company Lanzhou China State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems China Electric Power Research Institute Beijing China Electric Power Research Institute State Grid Gansu Electric Power Company Lanzhou China

ISBN: (纸本)9781538614273

In the interconnected power grids, the wind energy can be accommodated in the wider area by optimizing the tie line power flows and coordinating the multi-area generation resources. Therefore, a sequential simulation method considering the flexible operation of high voltage direct current (HVDC) tie lines is presented in the paper to analyze the wind accommodation in the long-term horizon. To speed the computation for long-term simulation, the aggregate unit model is considered to reduce the number of integer variables by clustering a large number of individual units into a few of unit groups. In addition, a rolling calculation strategy is adopted for the simulation of a year. In the end, a case study is conducted to show the feasibility and effectiveness of the proposed method. © 2017 IEEE.

关键词： Aggregates

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Generation method for the PV power time series combining the decomposition technique and Markov chain theory

Generation method for the PV power time series combining the...

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6th International Conference on renewable Power Generation

作者： Xu, Shenzhi Ai, Xiaomeng Fang, Jiakun Wen, Jinyu Li, Pai Huang, Yuehui State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan Hubei Province430074 China Department of Energy Technology Aalborg University AalborgDK-9220 Denmark China Electric Power Research Institute State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems Beijing100192 China

Photovoltaic (PV) power generation has made considerable developments in recent years. However, its intermittent and volatility of its output have seriously affected the security operation of the power system. In order to better understand the PV generation and provide sufficient data support for analysis the impacts, a novel generation method for PV power time series combining decomposition technique and Markov chain theory is presented here. It digs important factors from historical data from existing PV plants and then reproduce new data with similar patterns. In detail, the proposed method first decomposes the PV power time series into ideal output curve, amplitude parameter series, and random fluctuating component three parts. Then generating daily ideal output curve by the extraction of typical daily data, amplitude parameter series based on the Markov chain Monte Carlo (MCMC) method, and random component based on random sampling, respectively. Finally, the generated three parts are recombined into new PV power time series by the decomposition formula. Data obtained from real-world PV plants in Gansu, China, validates the effectiveness of the proposed method. The generated series can simulate the basic statistical, distribution, and fluctuation characteristics of the measured series. © 2017 Institution of Engineering and Technology. All rights reserved.

关键词： Time series

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Multi-machine equivalent model parameter identification method for double-fed induction generator (DFIG)-based wind power plant based on measurement data

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The Journal of Engineering 2017年第13期2017卷 1550-1554页

作者： Kui Luo Wenhui Shi Jixian Qu State Key Laboratory of Operation and Control of Renewable Energy and Storage System Renewable Energy Research Center China Electric Power Research Institute (CEPRI) Beijing 100192 People's Republic of China

Dynamic equivalent modelling for wind power plant (WPP) has become an important tool to analyse the grid integration characteristics of large-scale WPPs. Owing to the large differences of operational performance between wind turbines, multi-machine equivalent model is more accurate to represent the WPP. In order to determine the generator parameters of multi-machine equivalent model, this study proposed a multi-machine equivalent model parameter identification method for DFIG-based WPP only with data measured at the point of common coupling. On the basis of established clustering model, it is explained how the measurement data are properly processed for use as the input of parameter identification considering the collecting circuit and the estimated instantaneous power of equivalent wind turbine. The developed parameter determination method is tested against a large-scale plant model, and simulation results confirm the effectiveness of the method.

关键词： wind power plants parameter estimation power grids asynchronous generators wind turbines power generation control multimachine equivalent model parameter identification method wind power plant measurement data dynamic equivalent modelling WPP established clustering model equivalent wind turbine developed parameter determination method large-scale plant model

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Study on Transient Overvoltage of Wind Farm Caused by Fault of HVDC System and Its Suppression Measures

Study on Transient Overvoltage of Wind Farm Caused by Fault ...

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IEEE Conference on energy Internet and energy System Integration

作者： Jin Liu Rongrong Jiang Qiao Liu Li Zhang Ruiming Wang School of electrical and Electronic Engineering North China Electric Power University Beijing China State Key Laboratory of Operation and Control of Renewable Energy Storage Systems China Electric Power Research Institute Beijing China

Faults such as DC commutation failure and DC blocking will generate transient overvoltage at the converter station, and the transient overvoltage will be transitive. If the DC system sending end is a wind farm, transient overvoltage may cause wind turbines overvoltage and then off-gird. The reasons of transient overvoltage caused by commutation failure and DC blocking faults are analyzed. The mechanism of overvoltage that may cause wind turbines off-gird is elaborated. The simulation analyzes wind farm overvoltage under different fault conditions of HVDC, and verifies the effectiveness of measures to suppress transient overv oltage.

关键词： Commutation failure DC blocking HVDC Transient overvoltage Wind turbine

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