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Wind and Storage Cooperative Scheduling Strategy Based on Deep Reinforcement Learning Algorithm

Journal of Physics: Conference Series 2019年第3期1213卷

作者： Jingtao Qin Xueshan Han Guojing Liu Shang Wang Wenbo Li Zhe Jiang Key Laboratory of Power System Intelligent Dispatch and control of Ministry of Education (Shandong university) Jinan 250061 Shandong Province China +*** Key Laboratory of Power System Intelligent Dispatch and control of Ministry of Education (Shandong university) Jinan 250061 Shandong Province China State Grid Jiangsu Electric Power Company Economic Research Institute Nanjing 210008 Jiangsu Province China Tianjin Chengdong Power Supply Company Hedong District Tianjin 300250 China State Grid Shandong Electric Power Research Institute Jinan 250003 Shandong Province China

Wind energy has become one of the most promising new energy sources in the context of the global energy interconnection. However, the inherent uncertainty of wind power and the volatility of its output make it difficult to join the internet for scheduling. The uncertainty of the output must be reduced or even eliminated by certain methods. In this paper, wind power and energy storage are coordinated to eliminate the uncertainty of wind power output, and to reduce the burden on the grid while ensuring the long-term operation of wind farms. This paper first introduces Q-learning in reinforcement learning as a controller. Through a large number of historical wind power data training, the controller has good decision-making ability, so as to reduce the punishment caused by wind power uncertainty; then the Q-learning is improved aiming at the maximum average income of the stage. Finally, the Q-value network is established with conventional Q-learning and improved Q-learning. The DQN algorithm in the deep reinforcement learning algorithm is introduced for deep training and decision-making and the three algorithms are verified. The result proves that the deep reinforcement learning algorithm can achieve better control effect than Q-learning.

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Image super-resolution via Gaussian scale patch group sparse representation

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International Journal of intelligent Information and Database Systems 2018年第2-3期11卷 186-206页

作者： Minghu, Wu Yaqi, Lu Nan, Zhao Min, Liu Cong, Liu Shangli, Zhou Hubei Collaborative Innovation Center for High-efficiency Utilization of Solar Energy Hubei University of Technology Wuhan430068 China Hubei Key Laboratory for High-efficiency Utilization of Solar Energy and Operation Control of Energy Storage System Hubei University of Technology Wuhan430068 China Hubei Power Grid Intelligent Control and Equipment Engineering Technology Research Center Hubei University of Technology Wuhan430068 China

This passage puts forward a Gaussian scale patch group sparse representation method, to solve the shortage problem of traditional image super-resolution restoration schemes. Our image reconstruction method is focused on the optimisation of sparse representation method model, which brings the method and performance improvement to image sparse reconstruction. The overall framework of our approach is as follows. First of all, we utilised the nonlocal similar patches to extract the patch groups, and then using the simultaneous sparse coding to develop a nonlocal extension of Gaussian scale mixture model. In the end, we integrate the patch group model and Gaussian scale sparsity model into encoding framework. The experimental simulation results show that the proposed framework method can both maintain the clarity of the edge and also inhibit the bad artefacts. Our method often provides a higher subjective/objective quality of reconstructed images than other competing methods. © 2018 Inderscience Enterprises Ltd.

关键词： Image enhancement

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Reasch on IED configurator automatic modeling based on IEC 61850

Reasch on IED configurator automatic modeling based on IEC 6...

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

作者： Shen, Baiqiang Yuan, Yongjun Xie, Liwei Zeng, Xiangjun Liu, Yixuan Luo, Hui Hangzhou Power Supply Company State Grid Zhejiang Electric Power Corporation Hangzhou Zhejiang Province China Hunan Province Higher Education Key Laboratory of Power System Safety Operation and Control Changsha University of Science and Technology Changsha Hunan Province410004 China Longyan Electric Power Supply Company State Grid Fujian Electric Power Company Longyan Fujian Province364000 China

ISBN: (纸本)9781538614273

Data modeling based on IEC 61850 standards is the basis for the realization of intelligent substation automation. Traditional manual modeling methods need spending lots of time, and some current intelligent electronic device (IED) configurators are not suitable for applications. To improve IEDs' data modeling methods and IED configurators' modeling methods, an IED configurator automatic modeling method is designed in this paper. Based on object-oriented modeling technology of IEC61850, decompositions and combinations of IED logical nodes, constructions of IED modeling files and configuration processes are analyzed in details. Designing methods of IED configurators' functions and modules are summarized. The application of the IED configurator automatic modeling method in HZP511 line protection monitoring and control device is demonstrated. Results: show that both of modeling workload and probability of error in modeling are greatly reduced compared with artificial modeling methods. © 2017 IEEE.

关键词： Automation

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Novel transient-energy-based directional pilot protection method for HVDC line

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protection and control of Modern power Systems 2017年第1期2卷 159-168页

作者： Guibin Zou Qiang Huang Shenglan Song Bingbing Tong Houlei Gao Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong UniversityJi’nanChina. State Grid Weifang Electric Power Company Weifang 261021China. State Grid Langfang Electric Power Company Langfang 065000China.

This paper proposes a novel directional pilot protection method based on the transient energy for bipolar HVDC *** the positive direction of current is from DC bus to the DC line,in the case of an internal line fault,the transient energies detected on both sides of the line are all negative within a short time,which denotes the positive direction fault;while for an external fault,the transient energy on one end is positive,which means a negative direction fault,but the transient energy on the opposite end is negative,which indicates that the fault direction is *** to these characteristics,an integration criterion identifying fault direction is *** addition,through setting a fixed energy threshold,the faulted line and lightning disturbance can also be *** results from UHVDC transmission system show the validity of the proposed protection method.

关键词： Transient energy HVDC line Directional pilot protection Fault direction Lightning stroke

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Synergistic Dispatching Model of power Source and Electric Network Considering Transmission–Distribution Connection Topology Optimization

Synergistic Dispatching Model of Power Source and Electric N...

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2017 5th International Conference on Mechatronics,Materials,Chemistry and Computer Engineering(ICMMCCE 2017)

作者： Huadong Li Jiayin Jiang Si Yang Wenbo Li Zhi Li Ming Li State Grid Shandong Electric Power Research Institute Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education (Shandong University) Economic & Technology Research Institute State Grid Shandong Electric Power Company State Grid Shandong Electric Power Company

For the large-scale integration of renewable generation into power grid and strengthening of active load regulation ability, the power transmission and distribution network coupling has become closer, and the contradiction between the source and network has been more prominent, which has brought new challenges to power system operation dispatching. In order to further enhance the coordination and interaction ability of the power grid, a synergistic dispatching model of power source and electric network is constructed on the basis of the traditional economic dispatching. By optimizing the transmission-distribution network connection topology, the operation economy has improved while ensuring system reliability. Case studies on a realistic power system show that the mathematical model is advantageous to the optimization of the whole power grid operation.

关键词： Economic dispatching synergy between power source and electric network coordination between transmission and distribution network topology optimization

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A Unified DC-AC power Flow Algorithm of Distribution Network with Distributed Generation

A Unified DC-AC Power Flow Algorithm of Distribution Network...

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2017 5th International Conference on Mechatronics,Materials,Chemistry and Computer Engineering(ICMMCCE 2017)

作者： Wenbo Li Keqiang Li Donglei Sun Lulu Li Chunlong Chen Si Yang State Grid Shandong Electric Power Research Institute Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education (Shandong University) Economic&Technology Research Institute State Grid Shandong Electric Power Company

With the development of rectification technology and DC equipment, hybrid DC-AC transmission has arisen in the distribution network. In addition, the penetration of distributed generation(DG) in the distribution network makes the analysis of power system more complicated. As a key measure of grid programming and operating, a practical power flow method of DC-AC distribution network is urgent to study. Firstly, the mathematical model of DGs is given in this paper, and the analysis of the operation and control mode of DC-AC distribution system with voltage source converter(VSC) is conducted. Then a calculation method of hybrid DC-AC distribution system with DGs is proposed, in which constant-power DG, voltage controlled DG and DG with voltage static characteristic is concerned. An improved forward backward sweep method is given, concerning VSC, AC circuits, DC circuits and various type of DGs, which achieves the purpose of unified DC-AC power flow calculation. Finally, case study for a 90-node distribution network with DG integration is conducted to demonstrate the effectiveness of the method.

关键词： DC-AC distribution network voltage source converter distributed generation power flow forward backward sweep method

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Fault location in active distribution network based on the change of current phase

Fault location in active distribution network based on the c...

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

作者： Chen Zhang Zhong Liu Jun Huang Bo Wang Xiangnv Wang State Grid Yangzhou Power Supply Company Yangzhou PR China The Key Laboratory of power System Intelligent Dispatch and Control of the Ministry of Education Shandong University Jinan PR China

ISBN: (纸本)9781538614280

The growing penetration of the distributed generation (DG) makes the traditional passive distribution network change to active distribution network. A new fault location method is proposed in this paper based on the change of the current phase, which can be used in active distribution network. Specifically, a fault model of the invert DG is proposed, then the active distribution network model is established. The current phase difference between the two ends of the distribution line are calculated for both the normal operation and fault conditions. The relationship between the current phase and the location of the fault is summarized. A fault location criterion is proposed based on the change of the current phase difference. The correctness and effectiveness of the proposed method is verified using the practically measured data and the fault simulation.

关键词： Fault location Current measurement Photovoltaic systems Circuit faults Phasor measurement units Inverters

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A Demand Response Scheme for Wind Integrated power System Based on Mechanism Design Theory

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IOP Conference Series: Materials Science and Engineering 2018年第1期366卷

作者： Xueliang Li Donglei Sun Yumin Zhang Xueshan Han Mingqiang Wang Si Yang Wenbo Li Xin Wei Economic & Technology Research Institute of State Grid Shandong Electric Power Company Jinan China Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan 250061 China State Grid Shandong Electric Power Research Institute Jinan China

The increasing integration of high penetration of wind power into power systems have created great challenges for stable operation of the power system. It is important to design a reasonable demand response scheme (DRS) to make decision the optimal load relief, specially, for the wind power suppliers (WPS) and their customers (WPSC). Therefore, this paper proposes a demand response scheme for wind integrated power system based on mechanism design theory. Firstly, we derive the outage cost function and incentive function modeled by the two variables: the customers' type parameter and the location value. Secondly, incorporate customers' type parameter and locational flexibility into the DRS, and based on game theory, a demand response scheme with incentive compatible constraint and participation constraint is designed to maximize the benefit both the wind power suppliers and their customers. The implication of demand response scheme is to design an incentive structure that encourages customers to sign up for the right scheme and reveal their true value of load reduction. Finally, the eight-bus system example can demonstrate the effectiveness of the proposed method.

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Reliability assessment of micro-grid based on Markov model

Reliability assessment of micro-grid based on Markov model

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

作者： Liu, Xiaoxian Yong, Wang Changwei, Song Qu, Hanbing Key Laboratory of Power System Intelligent Dispatch and Control Shandong University Jinan China State Grid Jinan Power Supply Company Jinan China

ISBN: (纸本)9781509054183

Micro-grid can absorb the distributed power effectively, reduce loss, and improve power supply reliability. In order to assess micro-grid reliability quantitatively, the random natures of distributed power output are analyzed firstly in this paper. Wind power and photovoltaic Markov model are set up. And the power smoothing of energy storage is considered. Then the corresponding reliability evaluation process was given. And lastly, this paper realizes the micro-grid running states analysis and reliability assessment based on the analytic method. In addition, the new reliability indexes for micro-grid are proposed in the paper. Finally, example proves the efficiency of the above model and method. The results show that distributed power Markov model has a timing sequence and makes the assessment can better reflect the practical operation of micro-grid. It's significant for improving the reliability and economy of micro-grid operation. © 2016 IEEE.

关键词： Wind power

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Reasch on IED configurator automatic modeling based on IEC 61850

Reasch on IED configurator automatic modeling based on IEC 6...

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

作者： Baiqiang Shen Yongjun Yuan Liwei Xie Xiangjun Zeng Yixuan Liu Hui Luo Hangzhou Power Supply Company State Grid Zhejiang Electric Power Corporation Hangzhou Zhejiang Province P. R. China Hunan Province Higher Education Key Laboratory of Power System Safety Operation and Control Changsha University of Science and Technology Changsha Hunan Province China Longyan Electric Power Supply Company State Grid Fujian Electric Power Company Longyan Fujian Province China

Data modeling based on IEC 61850 standards is the basis for the realization of intelligent substation automation. Traditional manual modeling methods need spending lots of time, and some current intelligent electronic device (IED) configurators are not suitable for applications. To improve IEDs' data modeling methods and IED configurators' modeling methods, an IED configurator automatic modeling method is designed in this paper. Based on object-oriented modeling technology of IEC61850, decompositions and combinations of IED logical nodes, constructions of IED modeling files and configuration processes are analyzed in details. Designing methods of IED configurators' functions and modules are summarized. The application of the IED configurator automatic modeling method in HZP511 line protection monitoring and control device is demonstrated. Results show that both of modeling workload and probability of error in modeling are greatly reduced compared with artificial modeling methods.

关键词： Object oriented modeling IEC Standards Circuit breakers Data models Tools Logic devices Integrated circuit modeling

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