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检索条件"机构=Key Lab of Power System Intelligent Dispatch and Control"

共 1779 条记录，以下是231-240 订阅

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An Open Source Simulation Toolkit for Large-Scale Electrical power system Static and Dynamic Studies

An Open Source Simulation Toolkit for Large-Scale Electrical...

引用

2020 IEEE/IAS Industrial and Commercial power system Asia, I and CPS Asia 2020

作者： Li, Changgang Wu, Yue Zhang, Hengxu Liu, Yutian Shandong University Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education Jinan China

ISBN: (纸本)9781728143033

This paper is an overview of Simulation Toolkit of Electrical power systems (STEPS). STEPS is an open-source toolkit designed for the education of power system simulation. STEPS has an independent kernel which is coded in C++ to achieve better computational efficiency. STEPS also provides a python module named stepspy to provide higher-level functions to simplify the operations. power flow solution is implemented and options are included in STEPS to maintain a balance between speed and convergence. Based on the power flow solution, dynamic simulation of large-scale systems with renewable sources is also implemented in STEPS. Abundant additional options are provided to achieve better accuracy and speed. Detailed steps to install STEPS, approaches to use stepspy, and the way to use Python paralleling computing are discussed. Cases are given to show the performance of the power flow options provided in STEPS. Dynamic simulation and efficiency of Python parallel when generating samples for research are also presented in this paper. © 2020 IEEE.

关键词： Python

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The Effect of Phase Locking Error on control of Grid-Connected Inverter in Distribution Network

The Effect of Phase Locking Error on Control of Grid-Connect...

引用

2023 International Conference on power system Technology, powerCon 2023

作者： Yuanqi, Wang Zhihao, Yun Shandong University Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education Jinan China

ISBN: (纸本)9798350300222

The phase-locked loop provides a phase reference for the coordinate transformation in grid-connected inverters to ensure synchronous operation and power output. In the distribution network, under the conditions of three-phase unbalance because of the diversity of loads, untransposed line and the complex operating conditions, the phase-locked loop can produce phase locking errors that affect the inverter power output and thus the regulation of the active distribution network. Therefore, by analyzing the inverter control, the influence of phase error of the phase-locked loop on the Park transformation and modulation signal is deduced, and the relationship between phase error, voltage, current, current reference value, and modulation signal is quantified. The simulation results prove the correctness of the analysis. © 2023 IEEE.

关键词： Errors

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Evaluation Method of Static Voltage Stability in Multi-infeed HVDC system during power system Restoration 5

Evaluation Method of Static Voltage Stability in Multi-infee...

引用

5th Asia Conference on power and Electrical Engineering, ACPEE 2020

作者： Ai, Hongyu Wang, Hongtao Shandong University Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Jinan China

ISBN: (纸本)9781728152813

Considering the coordination of restoration path selection and power recovery control, this paper proposes a static voltage stability evaluation method for multi-infeed HVDC (MIDC) system. Firstly, a multi-infeed comprehensive short circuit ratio (MISCR) index is applied to evaluate the voltage stability at the converter bus. The continuous power flow method is used to evaluate the static voltage stability margin of other AC nodes, which can not only be used as the safety constraint of power recovery, but also give the weak nodes of the system and guide the power recovery control. Then, the influence of restoration path on HVDC support capability is studied, a multi-infeed short circuit ratio offset (MSCRO) index is proposed to optimize the restoration path. When the restoration path is determined, MISCR can be used to calculate the maximum DC power that can be accessed and the voltage stability margin is obtained by continuous power flow method. Therefore, the purpose of making use of DC power to speed up the recovery process and ensure the safety of recovery is achieved. The IEEE 39 buses test system is taken as an example to verify the feasibility and effectiveness of the proposed method. © 2020 IEEE.

关键词： Recovery

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Communication Structure Design of controllable Residential Loads

Communication Structure Design of Controllable Residential L...

引用

2020 IEEE/IAS Industrial and Commercial power system Asia, I and CPS Asia 2020

作者： Ge, Xin Chu, Xiaodong Shandong University Key Laboratory of Power System Intelligent Dispatch and Control of the Ministry of Education Jinan China

ISBN: (纸本)9781728143033

A large number of controllable loads on the user side, especially scattered and flexible controllable residential loads, plays an important role in the safe, reliable and economic operation of the power grid. At present, they have been widely used in many aspects of the power grid such as demand-side management, dynamic security enhancement, etc. In order to achieve the integration of multiple controllable loads in the power grid, not only a reliable control strategy is required, but also need a communication structure with good performance including strong load-carrying capacity, low latency and appropriate network throughput. This communication structure would support the transmission of data packets or control commands between the controllable loads and the power grid. This paper proposes a three-tier communication structure of controllable residential loads, establishes a corresponding model based on OPNET and simulates in four different scenarios by collecting three statistics to verify the feasibility of this model. © 2020 IEEE.

关键词： Electric power transmission networks

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Spinning Reserve Optimization under Multiple Time Resolution Unit Commitment Module

Spinning Reserve Optimization under Multiple Time Resolution...

引用

2020 IEEE/IAS Industrial and Commercial power system Asia, I and CPS Asia 2020

作者： Li, Jianying Wang, Mingqiang Fang, Zhen Wang, Zhixin Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education Shandong University Jinan China

ISBN: (纸本)9781728143033

Spinning reserve is the unused capacity of synchronized units and it is used to address the unforeseen events during power system operations. This paper proposes a spinning reserve optimization method under the multiple time resolution unified unit commitment and economic dispatch model. Finer time resolution and detailed modeling will be used during the first few hours of the scheduling cycle, while coarser time resolution and simplified modeling will be used during the remaining hours. The spinning reserve is determined by minimizing the running cost, start-up cost, shut-down cost, reserve cost and the expected interruption cost. In order to overcome the computation intractability introduced by EENS, EENS is formulated as linear function of the system spinning reserve. It is found that the multiple time resolution model is fit for determining multiple type of reserves rather than single type of reserve. The efficiency and validity of the proposed method is verified using the IEEE-RTS system. © 2020 IEEE.

关键词： Scheduling

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Optimal scheduling of active distribution networks with energy storage systems considering environmental cost 5

Optimal scheduling of active distribution networks with ener...

引用

5th IEEE International Conference on Electric Utility Deregulation, Restructuring and power Technologies, DRPT 2015

作者： Bao, Rongrong Zhang, Wen Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan China

ISBN: (纸本)9781467371063

Along with the increasingly serious environmental issues, besides economic efficiency, much attention is paid to the environmental aspects in the daily dispatch of active distribution networks (ADN). This paper presents a comprehensive optimal model to minimize the economic cost and environmental cost. The damage cost from gas emissions and the uncertainty of renewable generations are taken into consideration. The charging and discharging strategy of energy storage systems (ESS) is a focus of the model. The general algebraic modeling system (GAMS) is used to solve this mixed-integer nonlinear problem. A modified 33-bus distribution network including photovoltaic (PV) systems and ESSs is employed to illustrate the effectiveness of the proposed method. Simulation results under different scenarios, with and without PVs/ESSs, show that utilization of charging/discharging strategy of ESSs can decrease the economic cost through peak load shifting. Moreover, increasing the penetration of renewable generations leads to the decrease of total cost. © 2015 IEEE.

关键词： Distributed power generation

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Study on the traveling wave differential protection and the improvement scheme for VSC-HVDC transmission lines

Study on the traveling wave differential protection and the ...

引用

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

作者： Lei, Wang Qing, Chen Xi, Chuanxin Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education Shandong University Jinan China

ISBN: (纸本)9781509054183

The traveling wave differential protection is an ideal main protection scheme of VSC-HVDC transmission line which is flexible, reliable and immune to the distributed capacitive current. However, it is seriously influenced by the unbalanced current due to the errors of traveling wave attenuation characteristic, time synchronization and calculating truncation. This unbalanced current would cause protection maloperation, especially when the serious external faults occur. In order to overcome this defect of traveling wave differential protection, the transient characteristic of the fault traveling wave is studied and find that the current traveling wave energy will outclass the energy of differential current when external fault occurs, and will not when internal fault occurs. Based on this characteristic, an improved traveling wave differential protection scheme was proposed. The PSCAD simulation is done to verify that the proposed scheme can correctly discriminate between internal and external faults with high sensitivity and reliability. © 2016 IEEE.

关键词： HVDC power transmission

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Topology Estimation of power Distribution Grids Using Graphical Model

Topology Estimation of Power Distribution Grids Using Graphi...

引用

2020 IEEE/IAS Industrial and Commercial power system Asia, I and CPS Asia 2020

作者： Deng, Chonghong Chu, Xiaodong Shandong University Key Laboratory of Power System Intelligent Dispatch and Control of the Ministry of Education Jinan China

ISBN: (纸本)9781728143033

Distribution networks represent the final tier in electric networks consisting of medium and low voltages lines that connect the distribution substations to the loads. Traditionally, distribution networks have been operated in a radial topology, with access to a lot of distributed renewable energy, the topology of distribution networks changes very frequently. power distribution networks suffer from a lack of real-time observability, estimation of the topology is a critical problem for its observability and control. In this paper, a new method based on graphical is proposed, which uses the voltage measurements collected from the grid to estimate the topology of radical networks. The learning method is based on Euclidean distance and minimum spanning tree Kruskal algorithm. The performance of the method is verified by simulation of a distributed test case. © 2020 IEEE.

关键词： Graphic methods

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Economic dispatch Considering Flexibility Provided by Load Static Voltage Characteristics 3

Economic Dispatch Considering Flexibility Provided by Load S...

引用

3rd IEEE Conference on Energy Internet and Energy system Integration, EI2 2019

作者： Wu, Yuqian Wang, Mingqiang Song, Yichen Zhang, Xiuping Shandong University Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Jinan China

ISBN: (数字)9781728131375

ISBN: (纸本)9781728131375

With the increase of proportion of renewable energy in the power system, the uncertainty in the power system is significantly increase, and the system's renewable energy consumption is facing more challenges. In traditional economic dispatch module, the load is often expressed by constant power, which cannot reflect the impact of static load voltage regulation on system operation. This paper proposes a new economic dispatching model in which the static load voltage regulation is respected. The proposed model can fully exert the automatic adjustment ability of load and provide some flexibility for the system. The results of the example show that considering the precise load model in scheduling helps to enhance the system to accommodate more renewable energy and improve the economics of system operation. © 2019 IEEE.

关键词： Renewable energy resources

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Robust Black Start Strategy with a High Share of Renewable Energy Generation 6

Robust Black Start Strategy with a High Share of Renewable E...

引用

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

作者： Fan, Xuemei Wang, Hongtao Li, Yong Shandong University Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Jinan China

ISBN: (纸本)9798350347159

Renewable energy generation is expected to participate in black start in case of blackout events, as they can significantly speed up power system restoration. This paper proposes a startup strategy aiming to improve the black start robustness against uncertainties introduced by wind or photovoltaic power plants. The strategy is composed of a short-term emulation model and a long-term ordered participation model. The short-term model concerns the transient state frequency and voltage stability under black start disturbances. It emulates the regulating capability of the power plants so as to determine if they can withstand the black start events. The long-term model deals with the steady state power and energy balance during black start units ramping. It takes into consideration the uncertainty of wind and photovoltaic power and calculates the confidence power output interval, and thereby prevents generation shortage caused by renewable power fluctuations. Based on the proposed strategy, an ordered participation algorithm is presented for online decision making of black start schemes, which are validated using a practical regional power system based study case. The results show that the proposed method can improve system robustness and stability for black start with wind and photovoltaic power. © 2022 IEEE.

关键词： Wind power

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