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

作者： Li, Pai Fan, Gaofeng Wang, Weisheng Huang, Yuehui Lin, Zhang State Key Laboratory of Operation and Control of Renewable Energy and Storage Systems China Electric Power Research Institute Beijing China State Grid Corporation of China Beijing China China Electric Power Research Institute Beijing China

ISBN: (纸本)9781509054183

Renewable energy curtailment has become a severe problem in some regional power networks of China. To alleviate the curtailment, optimizing the integrated wind and solar power capacities becomes an urgent need. This paper proposes an improved method to optimize the wind and solar power capacity based on the time sequence simulation technology. An optimization model is proposed to maximize the environmental benefit for a regional power network with considering the constraints of system power balance, thermal unit peak load regulation ability, system spinning reserve, power and heating coupling of the co-generation unit and tie-line transmission capacity. To handle the transmission capacity constraint, the regional power network is aggregated for simplicity. The annual wind and solar power time sequences are incorporated as inputs for optimization. By giving a series of scenarios with different proportion of wind and solar energy, the optimal capacities are obtained by comparing the environmental benefit and the curtailment. Case studies are conducted with a provincial power network of China and testing results verify the effectiveness of the proposed method. © 2016 IEEE.

关键词： Solar energy

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Research and Application of Trans-Regional Cooperative Disposal of UHV Interconnected power grid

Research and Application of Trans-Regional Cooperative Dispo...

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“紫金论电”2017智能电网保护和运行控制国际学术研讨会

作者： Shan Xin Li Jun Xu Xi Lu Jinjun NARI Group Corporation(State Grid Electric Power Research Institute) NanjingJiangsu Province211000China NARI Technology Co. Ltd.NanjingJiangsu Province211000China State Key Laboratory of Smart Gird Protection and Control NanjingJiangsu Province211000China

With the rapid construction of UHV AC/DC power grid,the integration characteristics of power grid are becoming more and more prominent,and real-time operation control of dispatching is significantly becoming more and more *** existing monitoring and control model based on the system model data cannot meet the requirements for the development of UHV power *** on the existing achievements of dispatching automation system,the general goal and framework of the trans-regional cooperative disposal of UHV interconnected power grid are put forward,and the key technologies are analyzed in four aspects: situation awareness,fault location,joint disposal and cooperative control to provide reference and example for follow-up construction for real-time control and support system for the dispatching of UHV power grid.

关键词： UHV situation awareness cooperative disposal source grid load wide area graphic browsing DC fault diagnosis

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Production simulation of power systems considering the forecast error of renewable energy

Production simulation of power systems considering the forec...

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

作者： Kun, Ding Ningbo, Wang Xie, Haipeng Bie, Zhaohong Laboratory of Wind Power Integration Operation and Control Gansu Electric Power Corporation Wind Power Technology Center Lanzhou China State Key Lab. of Elec. Insulation and Pwr. Equip. and Smart Grid Key Laboratory of Shaanxi Province Xi'an Jiaotong University Xi'an China

ISBN: (纸本)9781509054183

A short-term stochastic production simulation method considering the forecast error of renewable sources power is proposed to focus on the issue that conventional production simulation method is incapable of depicting the forecast error of renewable sources power. The proposed method contains two hierarchies, i.e. the day-ahead simulation and the real-time simulation. As for day-ahead simulation, a day-ahead scheduling of conventional units and renewable energy plants is determined by solving a unit commitment model on the basis of forecasted renewable sources power and load profiles. Real-time simulation is the supplement to day-ahead simulation and it corrects the results in day-ahead simulation. The validity of the proposed method is proved with a real power grid in Northwest China. Case studies show that conventional units may be still the major resource of power grids although these installed capacity is no larger than renewable energy resources. Meanwhile, forecast errors actually impact reliability of power systems. © 2016 IEEE.

关键词： Renewable energy resources

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Chance-Constrained Programming Model for Reference Network With Wind power Integration

Chance-Constrained Programming Model for Reference Network W...

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IEEE Conference on Energy Internet and Energy System Integration

作者： Donglei Sun Jinhong Yang Xueshan Han Junxiong Wang Xin Tian Bin Yang Lina Zhang Nan Wang Economic & Technology Research Institute of State Grid Shandong Electric Power Company State Grid Shandong Electric Power Maintenance Company Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education (Shandong University)

ISBN: (纸本)9781538614280

With the large-scale integration of volatile wind power generations, power system operation and planning face the problem of increasing injection fluctuations and uncertainties. In this paper, chance constraint expressions are used to characterize the wind power uncertainty, and then a new chance-constrained programming model for reference network with wind power integration is proposed to ensure the expected wind power utilization. In the proposed model, the objective function is minimizing total power generation cost and transmission investment cost, and the constraints are the safety operation technical requirements under intact operation state and the preconceived contingency operation state. The sample average approximation (SAA) method is used to develop a deterministic approach for the proposed model. Numerical analysis shows the potential benefit of the proposed model.

关键词： Reference network Wind power integration power grid evaluation Chance constraints Sample-average approximation (SAA)

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Unit Commitment Considering Demand Response Behavior Based on Utility Maximization

Unit Commitment Considering Demand Response Behavior Based o...

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IEEE Conference on Energy Internet and Energy System Integration

作者： Yumin Zhang Xueshan Han Bo Xu Li Zhang Donglei Sun Xiaofeng Miao Jiayin Jiang Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment (Department of Electrical Engineering Tsinghua University) Economic & Technology Research Institute of State Grid Shandong Electric Power Company State Grid Shandong Electric Power Company Yantai Electric Power Company

ISBN: (纸本)9781538614280

The active participation of demand side resources in power grid operation not only benefits the individual participant but also benefits the whole system. The optimal goal can promote by excavating the active behaviors of demand side. The welfare maximization of market participant is the driving force of such active behaviors. Considering the independence of each user's behavior, the consumer's utility function is selected to depict consumer's preference and demand response behavior. In order to coordinate the consumers' maximum welfare with social welfare maximization, consumers' utility function and units' operation cost are integrated into Unit Commitment (UC) model. The objective function is to maximize social welfare, by subtracting units' operation cost from consumers' total utility, and this objective can be acquired. Considering the proposed model should be solved in a distributed manner, the idea of the centralized coordination and the decentralized decision-making is proposed. Based on the Lagrangian relaxation (LR) principle and distributed real-time pricing scheme, a closed-loop feedback mechanism is constructed to reflect the relationship among generator output, price level, and load demand. The ten generating units example can illustrate the effectiveness of the proposed method.

关键词： Demand utility Decomposition coordination Electricity market Lagrangian relaxation Real-time pricing Unit commitment

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

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

ISBN: (纸本)9781509054190

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.

关键词： Reliability power system reliability Wind power generation Markov processes Photovoltaic systems Indexes

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A new Information publishing system Based on Internet of things

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IOP Conference Series: Materials Science and Engineering 2018年第5期322卷

作者： Li Zhu Guoguang Ma Hubei Collaborative Innovation Center for High-efficient Utilization of Solar Energy Hubei University of Technology Wuhan 430068 P. R. China Hubei Key Laboratory for High-efficiency Utilization of Solar Energy and Operation Control of Energy Storage System Hubei University of technology Wuhan 430068 P. R. China Hubei Power Grid Intelligent Control and Equipment Engineering Technology Research Center Wuhan 430068 P. R. China Shenzhou rent screen (Xiamen) network technology Company Limited

A new information publishing system based on Internet of things is proposed, which is composed of four level hierarchical structure, including the screen identification layer, the network transport layer, the service management layer and the publishing application layer. In the architecture, the screen identification layer has realized the internet of screens in which geographically dispersed independent screens are connected to the internet by the customized set-top boxes. The service management layer uses MQTT protocol to implement a lightweight broker-based publish/subscribe messaging mechanism in constrained environments such as internet of things to solve the bandwidth bottleneck. Meanwhile the cloud-based storage technique is used to storage and manage the promptly increasing multimedia publishing information. The paper has designed and realized a prototype SzIoScreen, and give some related test results.

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Research on distributed wide-area back-up protection system for high-voltage transmission system

Research on distributed wide-area back-up protection system ...

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

作者： Wuyang Gai Wei Cong Zhiming Zhang Zijing Zhang Jing Xiao Yingchun Feng Key Laboratory of Power System Intelligent Dispatch and Control Shandong University Jinan Shandong China State Grid Shandong Electric Power Company Maintenance Company Jinan Shandong China

ISBN: (纸本)9781509054190

At present, the high-voltage back-up protection system is facing the problems of setting difficulty and the complexity of protection coordination causing too long delay. As for the primary system device-dependent configuration principle, it aggravates the complicacy of the secondary circuit which does not have the interchangeability and interoperability, reducing the reliability of the relay protection system. As a result, this article proposes a high-voltage wide-area distributed back-up protection system using circuit breaker IED configuration principle so as to provide comprehensive back-up protection for the circuit breaker-associated primary system. In the article, a protection zoning method based on three typical system structures is demonstrated which is able to simplify IED protection logic and redistrict the protection domain into efficient fault isolation procedures in the substructures. The principle is analyzed under the typical IEEE5 nodes model, and the reliable conclusion is obtained.

关键词： Reliability engineering

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Microgrid operational benefits distribution based on the theory of cooperative game

Microgrid operational benefits distribution based on the the...

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China International Conference on Electricity Distribution, CICED

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

ISBN: (纸本)9781467390712

To solve the internal distribution problem of microgrid operation benefit, a benefit distribution method based on the economic operation and cooperative game theory is proposed, which can satisfy individual rationality and global efficiency. It can be used to estimate value of various participants in microgrid and provide references for payment and settlement inside microgrid as well. The influence of characteristics of participants on the result of the distribution is analyzed through a typical example. Results indicates that the method proposed in this paper can realize rational distribution of microgrid benefit, and it could also guide and stimulate participants to improve own characteristics.

关键词： Microgrids Economics Games Mathematical model Game theory

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Consistency analysis of SCADA data from field power systems 10

Consistency analysis of SCADA data from field power systems

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10th International Conference on Advances in power System control, operation and Management, APSCOM 2015

作者： Zhang, Yaping Zhang, Hengxu Wang, Liang Hou, Guangsong Key Laboratory of Power System Intelligent Dispatch and Control of the Ministry of Education School of Electrical Engineering Shandong University Jinan China Dispatch and Control Center of Shandong Electric Power Corporation Jinan China Heze Power Supply Company of State Grid Shandong Electric Power Corporation Heze China

ISBN: (纸本)9781849199841

SCADA (Supervisory control And Data Acquisition) system is a basic infrastructure of modern power systems. SCADA data are widely used in applications such as state estimation, power flow calculation, and on-line security assessment. The accuracy of the SCADA data directly affects the implementation of power system automatic control. In practice, the error of the SCADA data may deviate from its factory precision due to the influence of the equipment aging, data transmission and so on. To quantitatively evaluate the validity of the SCADA data, a consistency index is defined in this paper. Some SCADA data from several substations of a power gird is checked with the consistency index to reveal its reliability.

关键词： SCADA systems

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