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检索条件"机构=Key Laboratory of Intelligent Dispatching and Control of Power Grid"

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Denoising Diffusion Probabilistic Imputation Model for Tabular Data

Denoising Diffusion Probabilistic Imputation Model for Tabul...

引用

Data Intelligence and Innovative Application (DIIA), IEEE International Conference on

作者： Jianbin Lu Shuai Han Weidong Chen Leping Sun Guangxi Key Laboratory of Intelligent Control and Maintenance of Power Equipment Electric Power Research Institute of Guangxi Power Grid Co. Ltd. Nanning China

ISBN: (数字)9798331504434

ISBN: (纸本)9798331504441

Data integrity is often compromised when information is stored, resulting in missing values within tabular datasets. The task of accurately recovering these lost values has emerged as a vibrant area of research. This study introduces a novel generative model termed the Denoising Diffusion Probabilistic Imputation Model (DDPIM) that is designed to predict missing data values with both efficiency and precision. DDPIM oper-ates as a diffusion probability model, discerning the true data distribution by first introducing Gaussian noise into clean data and then denoising it during the reverse process. The model commences by training a denoising diffusion model on a complete dataset, thereby acquiring the distribution characteristics of data. Subsequently, this pre-trained model is employed to reconstruct data points that are incomplete, i.e., those that contain missing values. DDPIM utilizes the distribution learned from the diffusion model as prior information and incorporates the known attributes within the incomplete samples as guiding conditions. This approach guides the data points with missing values towards the true data distribution. By leveraging the influence of the known attributes during the denoising phase, the incomplete samples are ultimately aligned with the actual data distribution. Extensive experiments conducted on a wide array of medical datasets demonstrate that our method yields superior performance compared to existing approaches.

关键词： Training Gaussian noise Data integrity Noise reduction Diffusion processes Predictive models Diffusion models Probabilistic logic Data models Imputation

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An Evaluation Method for Intraday Renewable Energy Accommodation Capacity Under Security and Stability Constraints

An Evaluation Method for Intraday Renewable Energy Accommoda...

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IEEE Asia power and Energy Engineering Conference (APEEC)

作者： Yan Chen Jiang Dai Hui Yuan State Key Laboratory of HVDC Electric Power Research Institute of China Southern Power Grid Company Limited Guangzhou China Power Dispatching Control Center Guizhou Power Grid Co. Ltd Guiyang China College of Electrical Engineering Zhejiang University Hangzhou China

ISBN: (数字)9798331517540

ISBN: (纸本)9798331517557

With the rapid integration of large-scale renewable energy sources into power grids, power systems face significant increasing challenges in accommodating large-scale renewable penetration. Accurate assessment of the maximum renewable energy capacity that a power system can accommodate is both essential and valuable. In this paper, a method is proposed to evaluate the renewable energy accommodation capacity at the intraday time scale under comprehensive security and stability constraints. A nonlinear optimization model is formulated to maximize the accommodation capacity, incorporating constraints such as transmission line active power flow limits, small-signal stability constraints, and frequency stability requirements. The model is solved using the bald eagle search (BES) optimization algorithm. A case study based on a regional power grid in a specific province demonstrates the effectiveness and accuracy of the proposed method.

关键词： Renewable energy sources Accuracy power transmission lines Optimization models power system stability Stability analysis power grids Security Optimization Load flow

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Review on control algorithm of drive system of permanent magnet synchronous motor for high voltage circuit breaker

Review on control algorithm of drive system of permanent mag...

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Energy, power and grid (ICEPG), International Conference on

作者： Yi Su Ke Zhou Wei Huang Yufeng Lu Yanjun Peng Gang Hong Guangxi Key Laboratory of Intelligent Control and Maintenance of Power Equipment Electric Power Research Institute of Guangxi Power Grid Co. Ltd Nanning Guangxi China

ISBN: (数字)9798350377798

ISBN: (纸本)9798350377804

Permanent magnet synchronous motor has been highly concerned in the era of high voltage circuit breaker drive control, in extra to enhancing the torque inactivity proportion of the engine itself, control hypothesis and request technology has been a heated mark in the meadow of change and development. In the past 20 years, the theories of constant voltage frequency ratio, vector control, direct torque control and weak magnetic field control have appeared one after another, and have made gratifying achievements in engineering applications. In this paper, the fundamental control algorithms of lasting magnet synchronous engine for high voltage course breaker and the delegate papers of control algorithms are reviewed, and the development progress is summarized. The challenges and future research directions of high voltage circuit breaker control algorithms are discussed, as well as the application of modern control theory in the control system of permanent magnet synchronous motor are discussed.

关键词： Torque Circuit breakers Torque control High-voltage techniques Permanent magnet motors control systems Synchronous motors control theory Voltage control Magnetic circuits

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Research and Implementation of control Strategies for Multiple Transmission Modes in Yongren-Funing HVDC

Research and Implementation of Control Strategies for Multip...

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2022 IEEE International Conference on power Systems and Electrical Technology, PSET 2022

作者： Zhu, Yukun Huang, Libin Li, Shuyong Zhu, Yihua Jia, Xuantao Jia, Xuantao State Key Laboratory of Hvdc Electric Power Research Institute China Southern Power Grid Guangzhou China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System China Southern Power Grid Guangzhou China Csg Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou China Zhejiang Electric Power Co Ltd Ehv Branch Company of State Grid Hangzhou China Xj Electric Co Ltd Xuchang China

ISBN: (纸本)9781665489157

The ± 500 kV Yongren-Funing HVDC transmission project is the first HVDC whose sending and receiving ends are both located in the same province, its inverter station is required to transmit power to different AC asynchronous grids according to the different requirements of the grid operation. The present control and protection system of HVDC cannot adapt to and meet the technical requirements of multiple power transmission modes. In order to achieve this goal, the control system of HVDC must be capable of automatic discrimination and sequential control, selecting the correct strategy of reactive power control (RPC), which is essential for the stable operation of the HVDC system. Therefore, based on the operating conditions of the HVDC system and the switch configuration of the AC switch yard of the inverter station, the principle, process and interlocking conditions of automatic switching between different transmission modes are systematically analyzed. Effects on RPC, last breaker and the over voltage protection of AC busbar are researched. The control strategies for multiple transmission modes have great significance for the similar HVDC/UHVDC transmission projects in the future. © 2022 IEEE.

关键词： Reactive power

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Active Distribution Network Energy Storage Planning Model for Reliability Requirements

Active Distribution Network Energy Storage Planning Model fo...

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power and Electrical Technology Conference (APET), Asia

作者： Yaqi Sun Wenchuan Wu Haotian Zhao Yujie Sheng Department of Electrical Engineering State Key Laboratory of Power Systems Tsinghua University Beijing China State Grid Fujian Electric Power Dispatching and Control Center State Grid Fujian Electric Power Co. Ltd Fuzhou China

ISBN: (数字)9798350367690

ISBN: (纸本)9798350367706

The integration of renewable energy sources into the power grid introduces significant volatility, which presents new challenges to maintaining reliable power supply. This increased volatility amplifies the demand for energy storage solutions within distribution networks. To address these challenges, this paper first develops an analytical reliability assessment model and embeds it into an energy storage configuration model. Then the model is converted into a Mixed-Integer Linear Programming (MILP) model for efficient solution. Case studies demonstrate that this approach can be used for energy storage planning according to different reliability requirements.

关键词： Analytical models Renewable energy sources power supplies Distribution networks Reliability engineering power grids Planning Mixed integer linear programming Active distribution networks Energy storage

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Unified grid-Forming control for MMC-MTDC Systems with Renewable power Integration

Unified Grid-Forming Control for MMC-MTDC Systems with Renew...

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HVDC (HVDC), International Conference on

作者： Renxin Yang Haiqing Cai Mingzhang Su Haohan Gu Zhihao Chen Xu Cai Key Laboratory of Control of Power Transmission and Conversion Shanghai Jiao Tong University Shanghai China State Key Laboratory of HVDC Electric Power Research Institute China Southern Power Grid Guangzhou China National Energy Power Grid Technology R&D Centre China Southern Power Grid Guangzhou China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System China Southern Power Grid Guangzhou China

ISBN: (数字)9798350387759

ISBN: (纸本)9798350387766

Using modular multilevel converter-based multi-terminal high voltage direct current (MMC-MTDC) transmission to integrate large-scale renewable power into the main power grid is an important development trend in China. To cope with the stability issues under weak grid conditions, different grid-forming control strategies have been proposed for the MMC in MTDC transmission systems. These control strategies have different structures due to different control targets and are difficult to unify. To solve this problem, a novel grid-forming control structure is proposed in this paper. The MMC emulates the synchronous generator (SG), and the submodule capacitor voltage emulates the SG rotor speed. On this basis, by utilizing the modulation control degree freedom, a unified DC-side controller is proposed to realize different control targets. Finally, the simulation model of a 4-terminal MMC-MTDC transmission system with renewable power integration is established in the PSCAD/EMTDC. The effectiveness of the proposed strategy is verified by the simulation results.

关键词： Renewable energy sources Simulation HVDC transmission Capacitors Rotors Switches control systems Synchronous generators Stability analysis grid forming

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Coordinated control Strategy for Active Support of power on Multiple Scenarios in Doubly-Fed Wind power and Synchronous Generator Bundled Delivery System

Coordinated Control Strategy for Active Support of Power on ...

引用

Energy Engineering and power Systems (EEPS), International Conference on

作者： Wuneng Ling Zhencheng Liang Li Xiong Yangdou Liang Yin Wu Qiuquan Deng Zhuohang Liang Chengxiang Li Guangxi Power Grid Dispatch and Control Center Nanning China Guangxi Power Grid Dispatch and Control Center Nanning China Nanning China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Electric Power Research Institute China Southern Power Grid Guangzhou China

ISBN: (数字)9798350375138

ISBN: (纸本)9798350375145

Aiming at the problem of poor frequency characteristics of the delivery island in the case of large-scale wind power and synchronous generator bundled via Ultra-high-Voltage Direct Current (UHVDC) transmission system, a coordinated control strategy is proposed for doubly-fed wind power and synchronous generator to jointly support the frequency of the delivery system, and The frequency modulation setpoint for doubly-fed wind power is crafted to flexibly switch its active support mechanism in response to different scenarios., and effectively improves the frequency stability of the delivery island system of wind power and synchronous generator bundled with the wind power and the synchronous generator. Using RTLAB, we constructed a simulation model integrating large-scale doubly-fed wind power and synchronous generators coupled with a DC transmission system. This model validates the efficacy of the control strategy proposed in this study..

关键词： Frequency modulation Doubly fed induction generators Wind power generation power system stability control systems Synchronous generators Stability analysis Wind turbines Frequency synchronization Frequency control

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A Search Method for controlled Islanding Surface Considering the Critical Nodes in Isolated Network

A Search Method for Controlled Islanding Surface Considering...

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intelligent power and Systems (ICIPS), International Conference on

作者： Qingxin Pu Xiangqiang He Guosong Wang Dongxu Chang Yihua Zhu Chengxiang Li Power Dispatching Control Center of Guizhou Power Grid Co. Ltd Guizhou China China Southern Power Grid State Key Laboratory of HVDC Electric Power Research Institute Guangzhou China

controlled islanding is an important measure to ensure the stability of power system and avoid widespread power outages. However, the traditional research methods based on single-objective optimization neglect the isolated network. To address this issue, a controlled islanding strategy considering the critical nodes in proposed in this paper. Firstly, based on the electrical connections and power flow distribution between nodes, an initial islanding surface is determined with the objective of minimizing power flow impact. Then, considering the electrical coupling connectivity of critical nodes, the final islanding scheme is selected within the neighborhood search space of the initial surface to enhance the stability of isolated subsystems after islanding. The proposed method is simulated and validated based on the 39-noded system, and the simulation results validate the effectiveness and superiority of the method.

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SSO Mitigation Strategy on the PMSG Wind Turbine Interfaced with AC System by a Improved Chopper control

SSO Mitigation Strategy on the PMSG Wind Turbine Interfaced ...

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Sustainable power and Energy Conference (iSPEC)

作者： Su An Chao Luo Qingxin Pu Qinfeng Ma Mingshun Lin Lingzi Zhu Power Dispatching Control Center of Guizhou Power Grid Co. Ltd Guiyang China State Key Laboratory of HVDC Electric Power Research Institute China Southern Power Grid Guangzhou China

In this paper, the small-signal model of the direct-drive permanent magnet synchronous generator wind turbine connected to the AC grid is established. The influence of the DC voltage control dynamics on the subsynchronous oscillation characteristics is analyzed based on eigenvalue analysis. Then transfer mechanism of subsynchronous oscillation components from AC side to DC side is analyzed based on the active power characteristic. A control strategy for suppressing the subsynchronous oscillation based on the improved control of the DC side chopper is proposed, and its effectiveness is validated by time-domain simulation.

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Research on Virtual Circuit of HVDC control and Protection System and Its Application 4

Research on Virtual Circuit of HVDC Control and Protection S...

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

作者： Zeng, Guanming Guo, Qi Lu, Yuanhong Li, Shuyong Ding, Xiaobing Li, Jie State Key Laboratory of Hvdc Electric Power Research Institute China Southern Power Grid Guangzhou China China Southern Power Grid Power Dispatching and Control Center Guangzhou China

ISBN: (纸本)9781728171494

According to the characteristics that network and optical fiber are widely used in the secondary system of HVDC control and protection system, referring to the virtual circuit of intelligent substation, a layered architecture for virtual circuit of HVDC control and protection system is proposed. The virtual circuit model is described by a series of description files: physical topology network description file, logical topology network description file, mapping relationship description file and LogicalLink description file. Based on virtual circuit, the visualization, online monitoring and other practical functions of secondary system can be realized, which can effectively support the on-site operation and maintenance personnel to quickly locate and troubleshoot the faults, and can also improve the reliability of the HVDC transmission system. © 2021 IEEE.

关键词： Network topology

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