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Equivalent of distribution network with distributed photovoltaics for electromechanical transient study based on user-defined modeling

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FRONTIERS IN ENERGY RESEARCH 2023年 11卷

作者： Jiang, Zhe Zhao, Kang He, Zhenghua Zhang, Zhixuan Zhou, Ning State Grid Shandong Elect Power Res Inst Power Grid Technol Ctr Jinan Peoples R China Shandong Univ Sch Elect Engn Jinan Peoples R China

As more and more distributed photovoltaics (PVs) are installed in distribution networks, the dynamic characteristics of PVs affect the operation of the bulk power system. Accurate simulation of PV characteristics is essential for the needs of power system transient security and stability analysis. However, because of the large number of distributed PVs, detailed modeling of each PV significantly increases the electromechanical transient simulation time. The equivalent study of distribution networks with distributed PVs is needed to improve simulation efficiency. However, existing equivalent methods of PVs mainly focus on centralized PVs but are unsuitable for distributed PVs with significantly different dynamic characteristics. To improve simulation efficiency, this paper proposes an equivalent method of the distribution network with distributed PVs for electromechanical transient study based on user-defined (UD) modeling. Firstly, the equivalent structure of the distribution network is established. The static equivalent of the transmission lines and the dynamic equivalent model of loads are carried out. Then, a UD model based on PSASP is established for the dynamic equivalent of the distributed PVs. Compared with the current PV models in simulation software, the UD model has multiple sets of parameters for the equivalent of distributed PVs with different dynamic characteristics. Finally, the particle swarm optimization (PSO) algorithm is used to obtain the parameters of the equivalent PV. The effectiveness of the proposed method is verified under an example of a distribution network with PVs in PSASP.

关键词： distributed photovoltaic distribution network user-defined modeling dynamic equivalent transient simulation

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A Study on user-defined modeling of VSC-HVDC Transmission System in PSS/E

A Study on User-defined Modeling of VSC-HVDC Transmission Sy...

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International Conference on Power System Technology (POWERCON)

作者： Zhu, Lin Chen, Da South China Univ Technol Sch Elect Power Guangzhou 510640 Guangdong Peoples R China

ISBN: (纸本)9781538664612

As a widely used power system analytical toolset in the world, Power System Simulator for Engineering (PSS/E) is also characterizing with its powerful user-defined function. This paper illustrates a study of user-defined modeling function in PSS/E through modeling a VSC-HVDC transmission system. The user-defined modeling (UDM) function of PSS/E is introduced in detail, then a modeling method for VSC-HVDC is proposed. Through comparing the simulation curves of user-defined VSC-HVDC in PSS/E with that simulated by PSCAD/EMTDC, the correctness of the VSC-HVDC user-defined model, the feasibility as well as the practicability of PSS/E's user-defined function are validated. The modeling method proposed in this paper can provide guidance and a basis for the modeling of other complex components in PSS/E for simulations.

关键词： VSC-HVDC PSS/E user-defined modeling electromechanical transients

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user-defined modeling of Static Var Compensation for Electromechanical Transient Simulation in PSS/E 6

User-Defined Modeling of Static Var Compensation for Electro...

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IEEE PES Asia-Pacific Power and Energy Engineering Conference (IEEE PES APPEEC)

作者： Chen, Yuchuan Zhu, Lin Yang, Huanhuan Cai, Zexiang Li, Sha South China Univ Technol Sch Elect Power Guangzhou Guangdong Peoples R China

ISBN: (纸本)9781479975372

PSS/E is the power system simulation software that widely used on North American, and possesses powerful user-defined function. The static var compensator ( SVC) is an important device for reactive power compensation. The CSVGN5 SVC, which is ready-made in PSS/E and widely used in western United States, and a modified SVC which is referenced the model in BPA, are built by means of user-defined function in PSS/E. Through the comparison of dynamic simulation results, the correctness and practicability of the proposed user-defined SVC model is validated.

关键词： PSS/E reactive compensation SVC transient simulation user-defined modeling

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An Approach to user-defined modeling Implemented with MATLAB 6

An Approach to User-defined Modeling Implemented with MATLAB

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IEEE PES Asia-Pacific Power and Energy Engineering Conference (IEEE PES APPEEC)

作者： Xu, Xin Zhang, Hengxu Xu, Qun Shandong Univ Minist Educ Key Lab Power Syst Intelligent Dispatch & Control Jinan 250061 Peoples R China Shandong Elect Power Corp Qingdao Power Supply Co Qingdao 266002 Peoples R China

ISBN: (纸本)9781479975372

user-defined modeling helps a lot in enhancing the flexibility of power system numerical simulation. A user-defined modeling scheme is proposed to extend power system numerical simulation capabilities. It is implemented with MATLAB, which can fully use the numerical calculation and visual modeling functions of MATLAB. Therefore, the simulation and analysis abilities of power system simulation software package can be effectively enhanced. The case shows the feasibility and effectiveness of this approach.

关键词： power system MATLAB numerical simulation user-defined modeling

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Research and Development of BPA-DIgSILENT Power Grid Model Conversion Software 8

Research and Development of BPA-DIgSILENT Power Grid Model C...

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8th International Conference on Power and Renewable Energy, ICPRE 2023

作者： Liu, Yonghan Guo, Jingmei Wang, Peng Zhao, Haoran Su, Qin Yu, Chaoyun Shandong University School of Electrical Engineering Jinan China China Southern Power Grid Technology Co. Ltd. Guangdong Provincial Key Laboratory of New Technology for Smart Grid Guangzhou China

ISBN: (纸本)9798350328813

DIgSILENT/PowerFactory has a rich component library, flexible modeling capabilities, and powerful power system analysis functions widely used worldwide. BPA software is commonly used in dispatch and planning departments, but problems exist, such as poor modeling flexibility. To automatically import the power grid model of BPA into DIgSILENT/PowerFactory, this paper analyzes the static component and dynamic controller models in BPA and DIgSLENT, provides the corresponding relationship between the data conversion of two simulation software, and uses DSL language to build the mainstream controller model of BPA in DIgSILENT. We studied the DGS file provided by DIgSILENT and the Python language API interface. We designed a conversion software for automatically importing BPA power grid models into DSILENT using Python language. Finally, taking the Maozhanyang area power grid of the Southern Power Grid as an example, the component parameters, power flow calculation results, and transient analysis results of two simulation software were compared to verify that the conversion software met the design requirements. © 2023 IEEE.

关键词： BPA Data conversion DIgSILENT user-defined modeling

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RTDS-based modeling for Full-process Simulation of Two Types of HVDC Systems

RTDS-based Modeling for Full-process Simulation of Two Types...

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IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)

作者： Cui, Yong Yang, Zenghui Yu, Yinghui Guo, Qiang Shen, Tugang SMEPC Elect Power Res Inst Power Technol Ctr Shanghai Peoples R China State Grid Corp China East Branch East China Elect Power Dispatching & Control Ctr Shanghai Peoples R China

ISBN: (纸本)9781509054183

The characteristics of DC system control and protection programs are analyzed for ABB and Siemens HYDC systems. The detailed model for full-process simulation of steady-state and transient response of HVDC system is established through combining RTDS component library and user-defined modeling by CBuilder. Simulation of steady-state and transient response of HYDC system is performed based on the model. The accuracy of the model is verified through comparison of the simulation results and the practical response of HYDC control and protection cabinet.

关键词： full-process simulation HYDC transmission Real time digital simulation system user-defined modeling

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Research and Development of Cascading Failure Simulating Software Containing Many Relaying Protections and Automatic Safety Devices

Research and Development of Cascading Failure Simulating Sof...

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International Conference on Power System Technology (PowerCon)

作者： Xu, Dechao Liu, Shuwei Xu, Shuwen Wang, Yixuan China Elect Power Res Inst Power Syst Dept Beijing Peoples R China China Airport Construct Grp Corp Airport Planning Design Inst Beijing Peoples R China

ISBN: (纸本)9781479950324

Based on MPI and user-defined modeling technique, software which can simulate the operation of power system with a great quantity of relay protections and automatic safety devices (relay protections and automatic safety devices are hereafter referred to as secondary equipment), is developed. The user-defined modeling technique using the object-oriented method is designed to set up models of secondary equipment. In the software, the great quantity of models can be configured individually or in group. To deal with massive computation, both network partition and secondary equipment grouping are used. The whole power grid is partitioned into several subnets and the secondary equipment models are divided into different groups. The subnet process for subnet solution and the external process for group computation are executed in different CPUs, for which simulation efficiency can be improved and cascading failure simulation can be fulfilled within acceptable time.

关键词： user-defined modeling Cascading Failure Parallel Computing Automatic Safety Device Relay Protection Object-Oriented Design

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