News Article | November 28, 2016
Argentina contracted 765MW of wind power and 516MW of solar PV via Round 1.5 of its RenovAr renewable energy programme, as average prices fell to around $54/MWh for both technologies. Competition again brought down prices from the $59.75/MWh cap and the average costs for solar and wind registered at Round 1. Solar was contracted at an average $54.94/MWh, with winning bids coming as low as the $48/MWh offered by provincial power company EMESA. Wind was contracted at an average prices of $53.34/MWh, with the lowest bid the $46/MWh offered by China’s Sinohydro Corporation. Competition was strong as the tender was once again oversubscribed, which led the government to contract more than the 400MW of wind and 200MW of solar PV initially announced. “The decision to contract more power than initially intended was because we decided to contract up to the maximum of transmission capacity in each node,” said energy minister Juan Aranguren. The government had qualified 1.6GW of wind bids and 888MW of solar PV bids. Despite the overwhelming presence of Chinese and Spanish companies in the tender, the winners were diverse, with local companies taking the biggest share. Among the top wind winners, Spain’s Isolux won two contracts totalling 198MW. Provincial companies EMESA (from Medonza province) and Parque Eolico Arauco (from La Rioja) won contracts for new 50MW and 95MW wind projects respectively. Local power companies Genneia, Centrales de la Costa Atlantica and CP Renovables won contracts to build 100MW, 38MW and 48MW respectively. The remaining two wind farms were secured by petrochemical group Petroquimica Comodoro Rivaldavia (100MW) and local businessman and banker Facundo Fravega (37MW). In solar PV, the winners were mainly local companies. The biggest winner was local developer 360Energy and companies owned by its controlling shareholder Alejandro Ivanissevich, with 170MW from seven projects. Medonza’s EMESA won 93MW, while local industrial companies Colway and Daiser and renwable power developer Latinoamerica Energia won contracts for solar projects with capacities of 20MW, 22MW and 1.7MW each. Among foreign players which won contract were Spain’s Isolux (80MW), China’s Jinko Solar (50MW), the US’s Soenergy (35MW) and Brazil’s Quaatro Participacoes (24.75MW). The contracts are due to be signed in January. Combined with Round 1 in September, Argentina has in 2016 contracted 1.5GW of wind and 916MW of solar that will be built over the next two years. “With Round 1.5 and the expected contracting of the [500MW from the old] Genren programme, Argentina will have approximately 9% of its power supply from renewables, over the target of 8%,” said Sebastián Kind, Argentina’s under-secretary for renewables. Argentina’s revamped renewables law requires 8% of supply from renewables by 2018 – up from below 1.8% today – and 20% by 2025. The tenders are expected to contract at least 1GW of wind, solar, biomass and biogas projects a year. Argentina has a total of 34GW installed capacity, of which 270MW is wind and around 8MW is solar. Total investment in the two renewable energy rounds is estimated at $4bn over the next two years, with the creation of 90,000 jobs, the ministry said. “This is a result of the investor confidence in Argentina and clear tender rules,” said Aranguren. The government will now study transmission restrictions and power demand to decide when and how much to offer in next year’s tender. Aranguren said that initially Round 2 should be announced by March, but the exact date will depend on the studies.
Wang H.,China Agricultural University |
Mao X.,China Agricultural University |
Dong F.,Sinohydro Corporation
Proceedings - 2010 7th International Conference on Fuzzy Systems and Knowledge Discovery, FSKD 2010 | Year: 2010
Set pair analysis method with five-element connection number was applied for a comprehensive evaluation of the beneficial effect of water-saving renovation in irrigation area. Taken inland irrigation area in the Yellow River, Huai River and Hai River region as an example, according to their characteristics in economic, social, cultural and environmental aspects etc., the index system for a comprehensive evaluation of the beneficial effect from the water-saving project was initially established. The relative membership function was constructed by Set Pair Analysis based on five-element, where the value of evaluation index of combined effects of water-saving renovation belongs to the variable fuzzy sets 5 grades of standard evaluation criteria for the combined impact of water-saving renovation in irrigation area. The case study is carried out in Huang-Huai-Hai irrigation area for a comprehensive impact evaluation of water-saving renovations. Results show that this evaluation method is simple, reliable and the conclusion is reasonable and practical, which indicates that this method is feasible for the comprehensive evaluation of the impact of water-saving renovation and can provide theoretical basis for water-saving management in irrigation area. ©2010 IEEE.
Mao J.,Hangzhou Electric Power |
Zhao M.,Hangzhou Electric Power |
Xu H.-W.,Sinohydro Corporation
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2010
The snow storm disaster in southern China occurred in early 2008 left a serious impact to the line relay protection channel adhering to the transmission line, due to the poor adaptability to sudden accidents of communication channel based on optical fiber, which is widely used in field of transmission line relay protection. Based on the comparison and analysis of several kinds of commonly used protection communication channels, the principle for 220 kV transmission line protection channel scheme is adjusted. Theoretic calculation is made to demonstrate the reasonability of the new principle application in 220 kV Fangyuan-Gangyang line and further suggestions on the new principle for 220 kV transmission line protection channel scheme are given.
Wang H.,Tsinghua University |
Wang H.,Sinohydro Corporation Ltd |
Fu X.,Tsinghua University |
Wang Y.,Tsinghua University |
And 2 more authors.
Computers and Geosciences | Year: 2013
The distributed basin model (DBM) has become one of the most effective tools in river basin studies. In order to overcome the efficiency bottleneck of DBM, an effective parallel-computing method, named temporal-spatial discretization method (TSDM), is proposed. In space, TSDM adopts the sub-basin partitioning manner to the river basin. Compared to the existing sub-basin-based parallel methods, more computable units can be supplied, organized and dispatched using TSDM. Through the characteristic of the temporal-spatial dual discretization, TSDM is capable of exploiting the river-basin parallelization degree to the maximum extent and obtaining higher computing performance. A mathematical formula assessing the maximum speedup ratio (MSR) of TSDM is provided as well. TSDM is independent of the implementation of any physical models and is preliminarily tested in the Lhasa River basin with 1-year rainfall-runoff process simulated. The MSR acquired in the existing traditional way is 7.98. Comparatively, the MSR using TSDM equals to 15.04 under the present limited computing resources, which appears to still have potential to keep increasing. The final results demonstrate the effectiveness and applicability of TSDM. © 2013 Elsevier Ltd.
Wang H.,Tsinghua University |
Wang H.,Sinohydro Corporation Ltd |
Fu X.,Tsinghua University |
Wang G.,Tsinghua University
Computers and Geosciences | Year: 2013
River coding method for drainage networks plays an very important role in the physical simulation of river basins. In this study we developed a new river coding method named Multi-tree Coding Method (MCM), which has the following features: (1) it is established on a topological pattern reflecting the dendriform structure of drainage networks; (2) the multi-tree code can be effectively managed by the database to perform convenient topological search toward drainage networks using Structured Query Language (SQL); (3) the multi-tree code does not exhibit digital overflow problems in the computer, thus any resolution and scale drainage networks can easily be coded; and (4) it supports high-efficient search process. A river reach can be directly positioned in a drainage network under MCM, without the complex search process from all river reaches. This feature has great potential to improve the computational performance of basin models. We demonstrate here the efficiency and practicality of MCM by testing it in the Yalu Tsangpo river basin, Tibet. A drainage network with 140,745 digital reaches was extracted from the digital elevation model (DEM), and the multi-tree codes of all river reaches were obtained. © 2012 Elsevier Ltd.
Wang S.,Beijing Jiaotong University |
Zhang X.,Sinohydro Corporation |
Wang Z.,Beijing Jiaotong University |
Lv D.,Beijing Jiaotong University
2010 International Conference on Modelling, Identification and Control, ICMIC 2010 | Year: 2010
In view of fuzzy modeling of complicate nonlinear systems, an on-line identification algorithm based on an improved T-S model is presented. Differential equation structure of the model is obtained first, then the fuzzy cluster center is corrected on-line according to the close degree of the input sample and the cluster center, and the cluster radius is refreshed in real-time according to the distance between the input sample and the cluster center. Finally, consequent parameters of the model are identified by the recursive least squares algorithm. Compared with previous identification algorithms, the on-line identification algorithm presented in this paper requires less fuzzy rules, has higher identification precision, and is simple and easy to implement. Practicability and effectiveness of the method are proved by the simulation results of the Box-Jenkins data and the boiler overheated steam temperature system. It provides a method to identify model parameters on-line for many new control strategies, such as fuzzy predictive control, adaptive control, etc.
Zhao Z.,Hubei Engineering University |
Zhao Z.,Sinohydro Corporation Ltd |
Yan P.,Hubei Engineering University |
Yan P.,Hubei University of Education |
And 6 more authors.
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2016
The vibration induced by the transient unloading of in-situ stresses (ISTU) is an important part of the eventual excavating vibration during the tunnel blasting excavation. In order to reveal the energy distribution characteristics of vibration induced by ISTU and its influence on the energy distribution of eventual excavating vibration, the energy distribution characteristics of vibration induced by ISTU under different in-situ stress levels and blasting loads were studied with the method of power spectrum analysis. The results showed that the frequency-band energy distribution of vibration induced by ISTU and blasting load were basically identical, but the main frequency of vibration induced by ISTU was lower than that induced by blasting load. The vibration induced by transient unloading of in-situ stresses was an influential factor, and it increased the low frequency component of vibration energy. The increase of in-situ stress level raised the vibration amplitude induced by ISTU and did not affect the frequency-band energy distribution. © 2016, Science Press. All right reserved.
Huang Z.,China Institute of Water Resources and Hydropower Research |
Wang Y.,China Institute of Water Resources and Hydropower Research |
Zhou H.,China Institute of Water Resources and Hydropower Research |
Gu H.,Sinohydro Corporation
ISWREP 2011 - Proceedings of 2011 International Symposium on Water Resource and Environmental Protection | Year: 2011
Since the 1960s, most inland lakes distributed in western China are getting shrinking, salty and even drying due to enhanced human activities. Deterioration of inland lake environment seriously influenced the sustainable development of local society and regional economy. In this article, we studied the dynamic evolution pattern of a representative inland lake in china, i.e., Ulungur Lake, based on water and salt balance of Ulungur Lake. With this model, the research recovered the natural water level, and simulated the evolution of water salinity during 1960-2005. The experimental results indicated that, the changing amplitude of lake-level response to human activities accounted for more than 70%, and the aggravated water salinization was tightly related to increasing irrigation water consumption and shortage of fresh water supply. © 2011 IEEE.
Zhang H.,China Electric Power Research Institute |
Zhu H.,Sino Hydro Corporation Ltd |
Shen H.,China Electric Power Research Institute |
Li B.,China Electric Power Research Institute |
Fang X.,China Electric Power Research Institute
Asia-Pacific Power and Energy Engineering Conference, APPEEC | Year: 2012
In order to adapt the new situation that large-scale wind power is being integrated into power system more and more, the probabilistic production simulation method for mixed wind-hydro-thermal power system is researched and improved in this paper. The units loading order is redefined based on equivalent continuous load curve. The indices of loss of wind energy expectation (LWEE) and abandoned wind rate (AWR) are proposed based on the improved production simulation. The analytical expression of partial derivative of the indices with respect to conventional unit capacity is derived based on cumulant method. The results on IEEE-RTS79 system demonstrate that the proposed method is feasible and effective. © 2012 IEEE.
Zhu H.,Beijing Jiaotong University |
Zhu H.,SINOHYDRO Co. |
Qu H.,Southwest Jiaotong University |
Zhang D.,Beijing Jiaotong University
Beijing Jiaotong Daxue Xuebao/Journal of Beijing Jiaotong University | Year: 2011
There are three indexes K30, Ev2, Evd which are used simultaneously to test the quality of the high speed railway roadbed. The indexes make the testing job very hard because of their strictness. In order to simplify the testing work, the paper analyzes the correlation of the three testing indexes based on a large number of site test data. The results of analysis indicate that there is good correlativity among the three indexes, and the values of indexes obtained through the regression curve are very close to the standard values. It is better to use Ev2 to substitute K30, or use Evd to substitute Ev2 and K30.