1. Roads, subways, power grids, and dams were constructed; cities were refurbished.

2. Hit by heavy storm, the power grid can not function properly.

3. The electrical power grid is particularly vulnerable to these extra currents, which can infiltrate high-voltage transmission lines, causing transformers to overheat and possibly burn out.

4. With the expansion of power grid and the increase of the transmission voltage grade, the status of relay protection in power system is becoming more and more important.

5. This research includes two parts:electrical source planning and power grid expanding planning. Reasonable grid is important to insure power system in safety and stabilization.

6. Demand - side management DSM can improve power grid load property.

7. Wide work voltage range,(/power grid.html) strong ability in adapting power grid.

8. The power grid has basically been the same for the better part of a century, says Ian Bowles, Massachusetts' secretary of energy and environmental affairs. That is, until the smart grid.

9. Analysis of Northwest China Power Grid shows that the presented indices are valid in practice.

10. National power grid , vice president of Beijing Economic and Technology Research Institute, Hu Zhaoguang coMMented.

11. The post-contingency small-signal stability region of power grid is analyzed for its economic operation.

12. Through the development of the power grid there appears high - low loop network.

13. Power grid is weak in 3N areas, wind power is far away from load center.

14. The stability of Shandong power grid as preliminary receiving end is simulated and analyzed.

15. The short-circuit capacity of power grid and the magnitude of short-circuit current increase continuously with the growth of power system's capacity.

16. Based on the Wuli-Shili-Renli(WSR) system methodology, the risk analysis of the power grid project financial lease is divided into three stages: Wuli, Shili and Renli.

17. High - performance, low - cost superconducting wires offer numerous advantages for electric power grid applications.

18. Powerformer is a new kind of high - voltage generator, which can be power grid directly.

19. This paper introduces a black - start test in Nanjing power grid.

20. The short circuit current of large load center that excesses the regulation standard seriously endangers security and stability of power grid.

21. However, in these civil establishments mostly used in single-phase inductive load, because of its low power factor, lag in reactive power grid in a larger proportion.

22. In order to reinforce the frequency stability of Yunnan power grid, the update and field tests of generator primary frequency control function have been carried out since 2005.

23. Microgrid offers a new idea to solve the technical challenge brought by the interconnection of distributed generation and reduce the affects of natural disaster such as earthquake on power grid.

24. Reliability level of HVDC power transmission systems becomes an important factor impacting entire power grid.

25. Multiple DC transmission lines were rooted in Shanghai, the load center in Southeastern China, which had injected vitality into the development of the Shanghai Power Grid.

26. The monopolar ground circuit operation mode of DC transmission system gives rise to excessive vibration and noise of some transformers in the power grid, which impacts the safety of equipment.

27. In this paper , abductive reasoning was introduced into power grid diagnosis and alarm.

28. A series hybrid active power filter for aeronautical variety - frequency power grid is studied.

29. Recommend reasons: the company's holding subsidiaries engaged in voltage insulators, the beneficiary railways, power grid construction.

30. The proposed method has been applied AGC system of Fujian power grid.

31. Last winter, winning bidders for three projects agreed to sell power to the national power grid for about 59 cents a kilowatt hour.

32. Gansu Power Grid average sales price for the standard price per kilowatt-hour at 2.27, excluding non - electricity price adjustment, an average of 2.9 hours per kilowatt-hour raise.

33. It requires further enhancement of power transmission capability to improve security and stability of power grid operation and increase power dealing of "west-to-east" power transmission.

34. Direct voltage transmission lines require a new federal and regional power grid strategy.

35. However, asynchronous generator power grid was exciting, adding to the power grids of reactive power demand.

36. In general, there are two main ways in power grid in China: the shunt capacitors and under load tap changer(ULTC) of main transformers, which both contribute to the two objectives above.

37. The SSR(subsynchronous resonance) possibility caused by series-capacitor compensation project in China Southern Power Grid is analyzed.

38. Scenario 1 Unguided ( concentrated charging ) Growth of 31.83 % for maximum load of power grid!

39. Three unbalanced phase loads varies randomly to lead to three phases unbalance in low voltage distribution system( ), which brings a series of problems on power grid.

40. The setout works and the process over the trial operation of HVDC power autoregulation system in China Southern Power Grid (CSG) are introduced.

41. There are three physical effects on the power grid. Among them, IR-Drop effect and ground bounce effect impact the signal integrity while electro-migration impacts the reliability of VLSI design.

42. These incremental costs imply far less than 1 percent of the world's annual income to convert to a clean power grid.

43. A new parallel algorithm of power flows in large - scale power grid is proposed.

44. Electricity: the deployment of a unified power grid to guarantee the demand for electricity.

45. For interconnected power grid with multi sending ends, the risk of dynamic instability can be reduced by coordinating the sending outputs among sending ends.

46. How to deal with and effective treatment mass monitoring information, to guard against and dissolve the grid operating risks and safeguard the safe operation of the power grid.

47. The simulation demonstrates that even though K value is same, the power grid impedance angle and wind farm power factor may also affect the voltage variation which is caused by wind farm.

48. Moths are killed by fully utilizing the phototaxis of the moths and the power grid, and the killed moths fall into a pond and are taken as the nutriment for pond life.

49. The reactive power variation of wind farm interconnected with power grid leads to voltage fluctuation grid.

50. In charge of the topics on wind power grid integration study.

51. The security evaluation of transmission grid is an important and frequent work for power grid business.

52. Electric power quality of wind park is a key index if wind park connects with public power grid.

53. Its operation shows that Jiaxing stands in the front rank in Zhejiang in the capability and technology of power grid construction.

54. This paper proposes a systematic design procedure for wide-area damping control(WADC) system in Shandong power grid.

55. The applications of underground cables in urban power grid are increasingly widespread, and the research on cables ampacity is more important.

56. Connection mode of wind farm and power grid is another important issue.

57. Super power grid compensation capacity, resist the voltage wave of power grid.

58. Three unbalanced phase loads varies randomly to lead to three phases unbalance in middle and low voltage distribution system, whi ch brings a series of problems on power grid.

59. For Shanghai power grid, which has large short circuit capacity and short electrical distance, a method using imported instrument to test power frequency variation distance protection is presented.

60. Welding voltage power grid voltage fluctuations and changes in arc length self - adjusting ability.

61. Some technical problems of distribution line project design for retrofit of urban power grid are introduced.

62. The quality of power grid topology expression directly affects the degree of difficulty, scalability, and the efficiency of ratiocination process for the real-time software system to perform.

63. Based on the power supply area of the project and the planning of receiving end power grid, the system design schemes of Zhuzhou converter station and relevant problems are comprehensively analyzed.

64. From the view of justice and universal service, the necessity and impendency to reform the rural power grid investment system and power price policy are investigated.

65. Today's alternating current power grid evolved after 1896, based in part on Nikola Tesla's design published in 1888 (see War of Currents).

66. Microgrid is put forward to coordinate contradiction between the large power grid and distributed generation.

67. To analysis frequency stabilityfrequency control strategies of Xinjiang power grid.

67.

68. When there were faults or maintenance in urban power grid, the power loads were transferred through closing loop operation to avoid blackouts of consumers and improve the reliability of power supply.

69. Through simulation, it is proved that SVC is capable of suppressing fluctuation of power grid caused by the output power of double-fed wind power generation system, and stabilizing the grid voltage.

70. The application of the supplementary analysis system is helpful for Shanghai Power Grid to enhance AGC control and frequency control ability under the control performance standard.

71. The influence of the D-STATCOM under the imbalance power grid voltage is studied in this paper.

72. By taking the improved interceptive sample method and deciding whether stops sampling after 2000 times of sampling, this method is mainly used to solve complex power grid assessment problem.

73. Circulating perfectible search mode and fault chain figure expression method of tree structure are first used to analyze power grid cascading failures.

74. Second, by means of the transient stability calculation for single and multiple faults, the stability of Guangdong power grid as a multiinfeed AC/DC power system is studied.

75. The paper introduces the design of power grid interlink and EMS system between offshore platforms.

76. The influences of the variation of system load and that of line structure on power grid voltage are analyzed, from this the vulnerable region and vulnerable bus of power grid voltage are determined.

77. IR drop on power grid may decrease switching speed and noise immunity of the circuits.

78. The un - satisfied power grid environment becomes the biggest challenge to the power line carrier technology.

79. It powers a wastewater treatment plant, with surplus energy going to the area power grid.

80. High ability in resisting public power grid voltage wave ang power grid compensation, stable welding current.

81. The actual line loss rate is reverted by using the theory of mathematical statistics in order to provide guidance for production and operation as well as reducing power grid losses.

82. Finally, the unbalanced current in Shenzhen power grid is reproduced by simulation with EMTDC. Based on conclusions of earlier studies, a solution is proposed and it is proved by simulation.

83. This paper introduced the ontology for knowledge representation of power domain. Constructed power grid operation repository to be shared by each application software system.

84. Theses switchgear assembly can greatly improve the operation reliability of power grid, gradually lower down the life cycle cost, step up the labor efficiency of power supply enterprise.

85. Thus, the calculation of Available Transmission Capacity (ATC) is in especial importance to reflect the security and economy of the power grid.

86. It requires further enhancement of power transmission capability to improve security and stability of power grid operation and increase power dealing of .

87. Today, improvements are needed in railroads and the electrical power grid.

88. Moreover, the facilities, built by a major Chinese state power grid, are off-limits to other entrants like Nissan's Leaf.

89. The different models of live line maintenance management were compared and analyzed for the actual condition of distribution power system in Heilongjiang power grid.

90. The biggest starting current unit for rated current operation unit nearly 1.5 times, which reduces the unit to start the impact of the power grid.