Yunnan Electrical Power Dispatching Control Center

Kunming, China

Yunnan Electrical Power Dispatching Control Center

Kunming, China

Time filter

Source Type

Li W.,The Ministry of Science and Technology of Yunnan Power Grid Co. | Jiang Y.,Yunnan Electrical Power Dispatching Control Center | Lei B.,YINENG CHINA Power Technology Co. | Yu F.,YINENG CHINA Power Technology Co.
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2015

A Multi-Agent System (MAS) based energy optimization management strategy for microgrid in market operation environment is proposed in order to maximize the cost and environment benefit. Firstly, the MAS is constructed, which consists of one market operator Agent (MOA), several MG Management Agents (MMA), one Utility Grid Agent (UGA), and many DG Agents (DGA). Then the power price bidding strategy is designed in the MOA according to the generation power plan provided by all the MMAs. By the power price bidding strategy, the best trade price and bid-winning power are determined in order to maximize economic benefit. On the basis of this, the energy management strategy is designed in MMAs, by which the optimal power dispatches for all DGAs are obtained by using an improved particle swarm optimization method for minimizing the operating cost. Finally, the validity of proposed method is demonstrated by means of simulation results. ©, 2015, Power System Protection and Control Press. All right reserved.


Zhao Y.,Yunnan Electrical Power Dispatching Control Center | Zhao C.,Yunnan Electrical Power Dispatching Control Center | Ye H.,Yunnan Electrical Power Dispatching Control Center | Yu F.,YINENG CHINA Power Technology Co.
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2015

Voltage sag is a typical power quality disturbance. Identifying the type of disturbance source causing voltage sag accurately is one of the important matters in power quality monitoring and management. Due to the correlativity and redundancy of the features, the identification method for voltage sag disturbance source has low accuracy. To resolve the problem, this paper proposes a method of feature reduction of voltage sag disturbance based on principal component analysis (PCA). Through the analysis of single disturbance source of voltage sag and complex disturbance source of voltage sag, multiple feature indices of voltage sag are obtained using wavelet coefficients in terms of statistics, wave morphology, entropy, energy, etc. These original feature indices are correlative and redundant. Based on PCA, the original feature indices are normalized, and then the covariance matrix is calculated, a couple of comprehensive feature indices after reduction can be obtained lastly. The correlativity and redundancy of the comprehensive feature indices are eliminated effectively. General classifier is used to verify the method. The simulation results show that comprehensive feature indices after reduction can effectively reduce the number of feature vectors which are input to SVM and the identification accuracy which is obtained using comprehensive feature indices is higher than the original features indices in the classification and identification of single and complex disturbance source of voltage sag under different noisy conditions. ©, 2015, Power System Protection and Control Press. All right reserved.


Chen R.,Yunnan Electrical Power Dispatching Control Center | Chen F.,Yunnan Electrical Power Dispatching Control Center | Zhang F.,Yunnan Electrical Power Dispatching Control Center | Cheng G.,YINENG CHINA Power Technology Co.
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2015

For the purpose of enhancing stabilization performance of three-phase grid-connected inverter, the robust stability control of micro-source inverter interface is studied. Firstly, based on the three-phase grid-connected inverter system, the three-order mathematical model is established. Then, taking into account uncertain parameters in the system dynamic model, a robust controller is designed based on Lyapunov robust stabilization method. Some sufficient conditions for the system stability are presented in terms of linear matrix inequalities (LMI) only dependent on the robust performance index. By using the convex optimization technique of LMI in MATLAB toolbox, the minimum robust performance index and the parameters of the robust controller can be obtained efficiently. The effectiveness of the proposed control scheme is demonstrated through simulation examples. ©, 2015, Power System Protection and Control Press. All right reserved.


Jiang Y.,Yunnan Electrical Power Dispatching Control Center | Li W.,The Ministry of Science and Technology of Yunnan Power Grid Co. | Zhao Y.,Yunnan Electrical Power Dispatching Control Center | Yu F.,YINENG CHINA Power Technology Co.
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2015

One of the core objectives of power system operation is to provide high-quality energy, the quality indicators of power system operation are mainly reflected by power quality. In order to assess the power quality objectively and effectively, a comprehensive evaluation method of high-quality network operation based on rough set and evidence theory is proposed. The method applies rough set theory to define the decision-making strength and expansion rules and uses the decision-making table to obtain the basic probability assignment of evidence theory, which make the result of probability assignment more objective. And then by applying the fusion rules of evidence theory to integrate the various indicators of power quality, the pros and cons of ordering from each power quality evaluations can be obtained to achieve a comprehensive evaluation of power quality. The examples show that the results of power quality evaluation are more objective and rational by using this method. So it can prove the correctness and superiority of this method. ©, 2015, Power System Protection and Control Press. All right reserved.


Zhu T.,Yunnan Electrical Power Dispatching Control Center | Liang L.,Yunnan Electrical Power Dispatching Control Center | Song Z.,YINENG CHINA Power Technology Co. | Cheng G.,YINENG CHINA Power Technology Co.
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2015

This paper proposes a coordinated control strategy based on Multi-Agent and Petri-net technology to improve the security and economy of the new energy micro-grid's electricity supply. The micro-grid is a typical hybrid system that includes many sorts of distributed energy resource units with different behavioral characteristics and multiple operational modes. Considering the complexity behind multi-mode behaviors, a Multi-Agent System is firstly constructed to implement distributed coordinated control strategy. Then, by using Petri net model, the multi-mode switching behaviors of the distributed energy resource units are described and the control strategies of their unit Agents are designed respectively. It is because that Petri net is one of the most useful tools for modeling the multi-mode system. On this basis, the coordinated control strategies are designed based on the Multi-Agent System platform. The effectiveness of the proposed control is demonstrated through simulation examples. ©, 2015, Power System Protection and Control Press. All right reserved.


Cheng J.,North China Electrical Power University | Liu Q.,Hubei e zhou power supply bureau | Xie Y.T.,North China Electrical Power University | Yang Q.,Yunnan Electrical power dispatching control center | And 4 more authors.
Advanced Materials Research | Year: 2014

The wind speed simulation model was given in this paper, combined with the power system analysis software (PSD-BPA) transient calculation of wind generator models, it implemented the wind speed disturbance of wind farms and the entire network voltage analysis. Combining the practicalpower grid in china, research on the power grid voltage fluctuation of the level after the large-scale wind farms integrated the system, and relevant the conclusions: In the process of wind disturbance, there is no angle stability of synchronous generator in the system, doubly-fed induction generator could emit and absorb reactive power, and thus could be able to maintain voltage stability. © (2014) Trans Tech Publicutions, Switzerland.


Luo S.,Huazhong University of Science and Technology | Li Y.,Huazhong University of Science and Technology | Chen B.,Huazhong University of Science and Technology | Shi D.,Huazhong University of Science and Technology | And 3 more authors.
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | Year: 2016

An adaptive wide area fault location algorithm for transmission lines with optimal phasor measurement unit (PMU) placement was proposed to solve the transmission line fault location problem under the conditions of lacking complete information. On the basis of analyzing fault-location observability based fault location principle, optimal PMU placement model for transmission network fault-location observability considering zero injection bus was established. Then the wide area fault location algorithm based on fault-location zone which was divided according to the grid topology and PMU installed nodes was proposed. When the grid topology changes, the fault-location zone was also updated correspondingly with partial modification. After the line failure, the fault-location zone that the fault line belongs to was quickly determined using PMU measurement. Without fault line information requirement, the adaptability of the proposed fault location method was improved. Simulation results based on PSCAD/EMTDC and Matlab have shown that the proposed method requires fewer PMU devices to achieve transmission network fault-location observability. The fault location algorithm based on fault-location zone has strong adaptability and high accuracy and is suitable to grid topology changes as well as various fault types, fault positions and fault resistances. © 2016 Chin. Soc. for Elec. Eng.


Liu W.,China Electric Power Research Institute | Zhao Y.,China Electric Power Research Institute | Wu C.,Yunnan Electrical Power Dispatching & Control Center | Li L.,Yunnan Electrical Power Dispatching & Control Center
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2015

A PSS parameters coordinated optimization algorithm based on PSO is proposed which improves the transmission capacities of multiple small hydropower station groups by increasing damping ratio of critical low frequency oscillation modes. Firstly, critical low frequency oscillation modes which influence the transmission capacities of small hydropower station groups are calculated. Then generators that participate in the PSS parameters optimization are selected based on the residue index which can comprehensively reflect the controllability and the observability of generators that involved in the critical low frequency oscillation mode. Lastly, the modified searching strategy is proposed to improve the efficiency of the PSO optimization searching. The proposed method is applied in Baoshan, Nujiang and Diqing small hydropower station groups in Dianxi area of Yunnan Power Grid to improve the total transmission capacity in Dianxi area. Simulation results show that the proposed method is feasible and effective. ©, 2015, Power System Protection and Control Press. All right reserved.


Cheng J.,North China Electrical Power University | Yang Q.,Yunnan Electrical power dispatching control center | Zhu T.,Yunnan Electrical power dispatching control center | Wang A.M.,North China Electrical Power University | And 2 more authors.
Applied Mechanics and Materials | Year: 2014

With the scale of the wind farm growing fast, its impact on the power system has become increasingly apparent. So the research has a significant meaning on the characteristics of dynamic stability of the power system which contains wind farms, and the stable operation of the large area interconnected power grid. In this paper it realized the application of the double-fed wind turbine grid model by using power system analysis software PSD-BPA. The analysis of the generator power Angle curve which indicate the state after the failure of N-1 shows as follows: with the wind farms integration on the grid, the damping ratio is decreased slightly but little change after the system failure of N-1, which is still live up to the standard of grid stability. © (2014) Trans Tech Publications, Switzerland.


Xu D.-L.,North China Electrical Power University | Cai B.-R.,Yunnan Electrical Power Dispatching Control Center | Liu Y.-Q.,North China Electrical Power University | Liu X.,North China Electrical Power University
Procedia Engineering | Year: 2011

With the constant expansion of Yunnan power grid, in current dispatching Automatic generation Control (AGC) mode, the use effect of small and medium-sized hydropower resources in the unified dispatching was not ideal. By building zoning control model artificially, the control targets and their coordinated relationship between main area and sub-areas are explicitly pointed out. The zoning and layered control mode of AGC between provincial dispatching and regional dispatching is put forward. Analysis and comparison are also made of the "independent zoning and layered control mode" and "coordinated zoning and layered control mode", and then their existing problems are pointed out. The research can provide the foundation of further study on AGC coordinated control strategies between provincial dispatching and regional dispatching, which can realize single goal and multi-objects of AGC coordinated control in the power grid. © 2011 Published by Elsevier Ltd.

Loading Yunnan Electrical Power Dispatching Control Center collaborators
Loading Yunnan Electrical Power Dispatching Control Center collaborators