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Evaluation Method of Distributed Photovoltaic Carrying Capacity in Distribution Network Based on Voltage Sensitivity Ranking 5

Evaluation Method of Distributed Photovoltaic Carrying Capac...

引用

5th IEEE International Electrical and Energy Conference, CIEEC 2022

作者： Yu, Haozheng Li, Ke Guo, Xinzhi Quan, Shaoli Zhao, Hanjie Zhu, Xingxu Li, Cuiping Zhu, Wenchao Yan, Jiaqi Gao, Kunqi Research Institute State Grid Henan Economic Zhengzhou China Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Jilin China

ISBN: (数字)9781665411042

ISBN: (纸本)9781665411042

With the increase of the proportion and dispersion of distributed PV connected to the distribution network, the possibility of extreme PV configuration is decreasing. However, the traditional bearing capacity evaluation includes a large number of extreme photovoltaic configuration scenarios, and the calculation results are too conservative. At the same time, the traditional evaluation method ignores the limitation of reverse power transmission to the main network at the time of large photovoltaic generation in the distribution network. For the above problems, a distributed photovoltaic carrying capacity evaluation method based on voltage sensitivity ranking is proposed. The method includes access scheme modification layer and index inspection layer: the voltage sensitivity ranking method is introduced into the access scheme modification layer to optimize the access scheme in each iteration and eliminate the extreme value distribution of photovoltaic. In the index inspection layer, the voltage deviation index and reverse power transmission of high proportion distributed photovoltaic distribution network are introduced to judge the rationality of the optimization scheme and feed back to the modification layer of the access scheme. The two-layer iteration finally obtains the calculation results of the distributed photovoltaic carrying capacity of the network. This method is closer to reality, reduces the conservatism of calculation and improves the adaptability of calculation. It has certain guiding significance for the photovoltaic planning and construction of the actual distribution network. © 2022 IEEE.

关键词： Bearing capacity

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Photovoltaic inverter model parameter testing method based on on-site operation data and hardware in the loop testing 12

Photovoltaic inverter model parameter testing method based o...

引用

12th International Conference on Renewable power Generation, RPG 2023

作者： Zhang, Xiaolin Yao, Guangxiu Dong, Wei Ding, Ming Chang State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute Beijing China

As the penetration rate of new energy increases, the interactions between new energy power stations and grid are becoming stronger. GB 38755-2019 "Code on security and stability for power system" clarifies new requirements for photovoltaic power generation from the perspective of power systems. Accurate photovoltaic power station models are the basis for conducting photovoltaic grid connection analysis, and have significant practical applications for analyzing photovoltaic power station access to power systems. Currently, the electromechanical transient model parameters of photovoltaic inverters are obtained based on laboratory parameter test data, without considering the optimization of photovoltaic inverter parameters under different grid conditions on site, resulting in significant deviations between the existing photovoltaic inverter model external characteristics and the on-site photovoltaic inverter operating characteristics of the power station. Therefore, this paper specifies the photovoltaic inverter model parameter requirements based on the power system simulation analysis requirements, proposes a photovoltaic inverter model parameter testing method based on on-site operation data and hardware in the loop testing. carries out key parameter identification based on particle swarm optimization algorithm. Finally, the correctness and feasibility of the proposed parameter testing method is verified based on a photovoltaic power station case in northwest China. © The Institution of Engineering & Technology 2023.

关键词： Synthetic apertures

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Fault ride through characteristics of connection of large wind power island to VSC-HVDC grid

Fault ride through characteristics of connection of large wi...

引用

2016 IEEE PES Asia Pacific power and Energy Engineering Conference, APPEEC 2016

作者： Yan, Li Chao, Liu Chi, Yongning Tang, Haiyan State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems China Electric Power Research Institute Beijing China

ISBN: (纸本)9781509054183

With increasing scale of wind power development, large wind power bases will, where there is no support from synchronous power source, be directly connected to the grid and therefore one of developing trends to transmit currently large-scale wind power is transmit the wind power 'island' with the long distance VSC-HVDC transmission technology when it is connected to the grids. When a large-scale wind power island is connected to a VSC-HVDC grid, the wind turbines and the VSC-HVDC grid will influence each other's operation and control, and in particular, in the case of fault, mutual coupling of dynamic characteristics of electrical variables at different time scales between the wind turbines and the VSC-HVDC grid cannot be ignored. The paper is focused on non-synchronous detection of disturbance, one of key problems found in connection of wind power to the VSC-HVDC grid, and studies the fault ride-through (FRT) technology for the island-connected large-scale wind power and the VSC-HVDC grid, by analyzing the impact of fault-response characteristics of the wind power and the VSC-HVDC grid at different time scales on each other. © 2016 IEEE.

关键词： Wind power

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Study on the impact of communication network on reactive power control in wind farm 8

Study on the impact of communication network on reactive pow...

引用

8th Renewable power Generation Conference, RPG 2019

作者： Li, Chunyan Li, Qing Zhang, Jinping Miao, Fenglin State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems China Electric Power Research Institute Beijing China

ISBN: (纸本)9781839531255

The performance of reactive power control system seriously affect the normal operation of wind farm. However, typical system architecture of reactive power control system usually contains several hierarchies and the communication network of the whole system is very complicated. So, the assessment of reactive power control system should take the communication network between these hierarchies in consideration inevitably. In this paper, instead of using a time delay to simulate the data transportation delay, a new method to model the network topology and data link layer is proposed. With this method, the communication network model, the reactive power control strategy as well as the wind farm model are all established in the same MATLAB/Simulink environment. Then the communication network performance such as end to end delay, node workload, communication protocol etc. can be evaluated and the influence of communication network to the reactive power control system can be analysed in one environment. In final, the effectiveness of this modelling method is validated by model simulation of the reactive power control system integrated with communication network. © 2019 Institution of Engineering and Technology. All rights reserved.

关键词： Network performance

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Supplementary Planning Of DESS In High Proportion Of Distributed PV + EV 5

Supplementary Planning Of DESS In High Proportion Of Distrib...

引用

5th IEEE Conference on Energy Internet and Energy System Integration, EI2 2021

作者： Ma, Huimeng Jin, Wentao Li, Bei State Key Laboratory of Control and Operation of Renewable Energy and Storage Systems China Electric Power Research Institute Beijing China

ISBN: (纸本)9781665434256

In order to solve the problems of increased voltage fluctuation and increased peak load caused by the high proportion of distributed photovoltaic (PV) and electric vehicles (EVs) connected to the distribution network, it is helpful to increase the storage efficiency and reduce the incremental cost of energy storage system (ESS) to carry out the energy storage supplement planning based on the aggregation of the EVs. Firstly, the "distributed energy storage +" resource partition hierarchical control topology and the economic incentive model of on-board energy storage aggregation are established, including on-board energy storage and distributed energy storage system (DESS). The mathematical models of on-board energy storage, DESS and the calculation model of the potential of on-board energy storage are established. Then, a DESS supplement planning model is built, which is including on-board energy storage participating in system peak shaving and valley filling. And the solution flow is given. Finally, an example is given based on IEEE-33 bus distribution network. It is verified that the supplementary planning based on the aggregation of existing resource is effective for cost reduction and efficiency increase of energy storage resource. © 2021 IEEE

关键词： Energy storage

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Coordinated Optimization of power Rating and Capacity of Battery Storage Energy System with Large-Scale Renewable Energy 6

Coordinated Optimization of Power Rating and Capacity of Bat...

引用

6th IEEE Conference on Energy Internet and Energy System Integration, EI2 2022

作者： Han, Peidong Li, Pai Xie, Xiaodi Zhang, Jinping China Electric Power Research Institute State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems Beijing China

ISBN: (纸本)9798350347159

With the rapid development of renewable energy power in China, the accommodation of renewable energy has faced a new challenge. The Large-scale battery energy storage system (BESS) is a promotive way to improve the accommodation of renewable energy. In this paper, a method for power rating and capacity optimization of BESS is proposed based on sequential production simulation technology. An optimization model is established to maximize the utilization of renewable energy, considering constraints of system power balance, the operation mode of BESS, and conventional units. The annual hourly curtailment time sequence of renewable energy is incorporated as inputs with the target of utilization rate as constraints for optimizing the power rating and capacity of BESS. In the case of studies, an annual hourly curtailment time sequence in a province of China is tested, and the optimal power rating and capacity of BESS of the province are obtained. The testing results verify the effectiveness of the proposed method. © 2022 IEEE.

关键词： Battery storage

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Modeling and Dynamic Performance Analysis of Grid Forming Doubly-fed Wind Turbine 6

Modeling and Dynamic Performance Analysis of Grid Forming Do...

引用

6th IEEE International Electrical and Energy Conference, CIEEC 2023

作者： Zhang, Xiaotong Qin, Shiyao Li, Shaolin Qi, Chen China Electric Power Research Institute State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems Beijing China

ISBN: (纸本)9798350346671

The doubly-fed wind turbine based on grid forming control has the ability to establish terminal voltage independently and maintain stability, but the quantitative analysis of grid-connected stability and dynamic performance is insufficient, which affects the engineering application. To solve this problem, a small signal analysis model of grid forming controlled doubly-fed wind turbine is established. And based on the oscillation mode and participation factor analysis, this essay finds out the dominant modes which are influenced by grid forming control and key control parameters. Furthermore, based on the root locus analysis, the influence of grid strength and key control parameters on the stability and dynamic performance of the system is revealed as well as the variation law. Finally, the simulation model of the grid forming doubly-fed wind turbine is built in MATLAB/Simulink, and the simulation proves the accuracy and effectiveness of the theoretical analysis, which is expected to guide the popularization and application of the grid forming doubly-fed wind turbine. © 2023 IEEE.

关键词： Wind turbines

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Research on inter-turn short circuit of armature windings in the multiphase synchronous generator-rectifier system

Research on inter-turn short circuit of armature windings in...

引用

作者： Sun, Yuguang Wang, Shanming Huang, Ziguo Mu, Shujun State Key Laboratory of Control and Simulation of Power System and Generation Equipment Department of Electrical Engineering Tsinghua University Beijing100084 China

The multiphase synchronous generator-rectifier system could provide an ideal DC power source for more electric aircraft (MEA). When the inter-turn short-circuit fault occurs in phase windings of the generator, a large short-circuit current would be introduced inside the armature windings, which could cause severe damages to the system for overheat in the windings and irons as well as huge electromagnetic forces on the end coils. To improve the reliability of the MEA, this study researches on the inter-turn fault of the multiphase generator-rectifier system, including the theoretical analysis, numerical simulation and experimental verification. A 12-phase system is taken for example, and a multi-loop mathematical model is built up to calculate all voltages and currents in the multiphase synchronous generator-rectifier system with armature inter-turn fault. Many factors are thoroughly considered in the model, including the location and short-turns of fault, space harmonics of air-gap magnetic field and the changing circuit topology of the system. The mathematical model is verified by fault experiment results. Moreover, the electric characteristics of the fault are summarised, which could provide a quantitative basis for early detection of the inter-turn faults in the multiphase generator-rectifier system. © 2018 Institution of Engineering and Technology. All rights reserved.

关键词： More electric aircraft

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simulation Study on the control Strategy of Parallel systems in Switched Reluctance Generators 4

Simulation Study on the Control Strategy of Parallel Systems...

引用

4th IEEE China International Electrical and Energy Conference, CIEEC 2021

作者： Zan, Xiaoshu Lin, Hang Wang, Ruiming Dai, Linwang China Electric Power Research Institute State Key Laboratory of Operation and Control of Renewable Energy Storage Systems Beijing China

ISBN: (纸本)9781728171494

To enhance generating capacity and reliability of multi-machine parallel power generation, implement the efficiency optimization, a current distribution control method based on differential evolution (DE) algorithm is proposed for the switched reluctance generator (SRG) in parallel. The load current is stabilized by the maximum value current sharing control (CSC) firstly. Then, the current distribution control method is adopted, which can adjust the reference current of each parallel generator in the current distribution part, so as to change the working point of each generator and implement the optimization of parallel system efficiency. The performances of the proposed control method are evaluated in detail by the simulation, and comparison with traditional current sharing control is carried out as well. © 2021 IEEE.

关键词： Optimization

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Analysis on the negative sequence impedance directional protection for stator internal fault of turbo generator

Analysis on the negative sequence impedance directional prot...

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作者： Hao, Liangliang Sun, Yuguang Arui, Qiu State Key Laboratory of Control and Simulation of Power System and Generation Equipments Department of Electrical Engineering Tsinghua University Beijing 100084 China

ISBN: (纸本)9788986510119

In order to protect more turn-to-turn faults for the turbo-generator with only three lead-out terminals in the neutral side, this paper applies a new principle protection - negative sequence impedance directional protection of fault components for stator internal asymmetrical fault. By means of Multi-loop Method, all possible internal short-circuit faults and single branch shutdown faults of a 300MW turbo-generator are calculated to obtain the protection performance. Calculation and performance analysis show that, this new principle protection is superior to other existing protections in the aspect of sensitivity and protection range, especially for interturn faults of turbogenerator stator winding. In addition, it won't incorrectly trip on external faults. Thus, this new principle protection can provide safeguard of high quality for internal faults in turbo-generator with only three lead-out terminals in the neutral side.

关键词： Stators

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