Everyone knows about China's huge population and the fast-growing economy. Although macro-level sociological economic analyses have given some attention to linkage between two, at micro level, relationship human resources and, more specifically, psychological capital of Chinese workers their performance has been largely ignored. Within context three factories (two private one state-owned) in People's Republic China, this exploratory study examined a sample ( n = 422) workers’ positive states...

As China continues its unprecedented economic growth and emergence as a world power, new solutions must be forthcoming to meet the accompanying challenges. We propose positive approach Chinese HRM that recognizes, develops manages psychological capital (PsyCap) of workers. After providing brief overview hope, efficacy, optimism, resilience overall PsyCap in today's context, results follow-up study provide further evidence workers is related their performance. The implications this...

This paper reveals that the impedance match (or Thevenin circuit) based voltage stability monitoring techniques have problems to predict limits when applied multi-load power systems. Power system loads are nonlinear and dynamic. They cannot be simply represented as circuit parameters for analysis. To overcome these difficulties, a new concept called "coupled single-port circuit" is proposed in this paper. The decouples meshed network into individual single generator versus bus and, result,...

It is an important task to accurately estimate the Thevenin equivalent impedance seen from a load bus for power systems monitoring and control. The purpose of this paper investigate mechanism characteristics in nonlinear circuit. A general model introduced investigating analytical manner. Two typical approaches are presented approximate impedance. simple three system employed test two methods. In simulations, types models, i.e. constant impedance, current power, discussed, respectively,...

The entropy is a measure of uncertainty and has been widely applied to almost all disciplines. purpose this paper give an overview the applications principles in power systems attract more researchers carry out further research field. Firstly, fundaments are introduced. Secondly, current presented respectively. Finally, some suggestions given for future on applying systems.

Power-grid partitioning is an important prerequisite for power systems security analysis and control. In this study, a novel recursive grid bipartitioning strategy proposed. First, two analytical expressions are derived from Kirchhoff's equations to represent coupling relationships between nodes. Then, generator nodes under study divided into groups by recursively applying the Finally, load used merge relevant corresponding of generators. The stopping criterion process also discussed....

Summary form only given: This paper reveals that the impedance match (or Thevenin circuit) based voltage stability monitoring techniques have problems to predict limits when applied multi-load power systems. Power system loads are nonlinear and dynamic. They cannot be simply represented as circuit parameters for analysis. To overcome these difficulties, a new concept called "coupled single-port circuit" is proposed in this paper. The decouples meshed network into individual single generator...

This paper discusses the effect of load change on Thevenin equivalent impedance power systems. In this paper, influenced by derivative active with respect to reactive (dP dQ) is analyzed. The forms a closed curve in complex plane and shrinks one point when voltage collapses. magnitude at collapse equal impedance. Therefore, match theory still holds under change. These features are verified New England 39-bus system.

Available transfer capability (ATC) is a relatively new concept and plays an increasingly significant role in the power industry deregulated environment. Calculating It involves many technical challenges including total calculation, transient stability constraint handling, transmission margins probabilistic ATC etc. In paper, several existing methods solving them are reviewed respectively. Some suggestions for dealing with technique given future research.

The use of PMUs is proving an important basis for online voltage stability assessment and monitoring. Due to the relatively high costs, it essential investigate possibility method reduce number PMUs. This paper first introduces analytical equivalent circuit approach assessment. Second, index proposed calculate factors influence system stability. Finally, a PMU placement determine their locations Case studies have been conducted on IEEE 30 bus system, results show that only few buses with...

Load modeling has a significant impact on power systems dynamic simulation and control. In this paper, an alternating least squares approach is proposed to decompose the nonlinear optimization problem of load parameter identification two linear problems, which can be solved in manner. A DFT-based numerical derivative technique also attenuate effect noises process estimation. Case studies are conducted using data laboratory measurements demonstrate effectiveness methods.

This paper investigates the relationship between impedance matching and maximum power transfer problems. First, a network reduction equivalent technique is presented ¿decoupled¿ obtained for every load bus. Second, special form of condition derived problem with an unlimited variation pattern. Third, this increase pattern common scaling factor. Difficulties analytical computation limit are discussed in relation to matching, predictor-corrector framework suggested fast estimation

Load shedding is a very important measure for power system voltage instability prevention. This paper proposes novel analytical sensitivity index to determine the optimal load locations avoid instability. An impedance ratio first presented indicate of buses, and based on this, derived identify rank buses be shed. Case studies have been conducted IEEE 30 bus system, simulation results show that proposed indexes could effectively

Amplitude and phase errors among multi-channels in digital array radar will seriously deteriorate the performance of beam-forming (DBF) high resolution direction finding. This paper describes a practical calibration algorithm that calibrates amplitude coarsely using interior source then realizes precise by eigen-decomposition approach. Based on an 8-elements test-bed operating at L & S band, experiments are carried out anechoic chamber outdoors. After calibration, radiation pattern is nearly...

Out-of-step protection is the worst situation to prevent a power system from collapse in large-size connection electrified Wire Netting. If no methods adopted deal with it, grid will blackout. So we must choose right criteria detect synchronization loss, do well coordination and select time trip generators. This paper outlines several for detecting loss gives advantages, disadvantages. It points out that it worth adopt ameliorated UCOS Φ based on WAMS. The separate at connected lines...

Retail Sales sector is the most important business in service economy, and also plays an essential role consumer-driven economy. Consumer behavior expectation key factor to retail sales fluctuations, which have big impacts on spending consuming decisions current future basis. We construct a consistent Pricing Behavior Composite Index Expectation compare with fluctuation patterns. conclude that appropriate methodology underlying survey, consumer could be useful proxy predict growth.

Available transfer capability (ATC) is a relatively new concept and plays an increasingly significant role in the power industry deregulated environment. In this paper, Benders decomposition technique applied to partition ATC calculation problem considering static security constraints into iterative two-stage mathematic programming problem. At first stage, master formulated for calculating with only steady-state constraints. second series of slave problems relevant different contingencies...

With the improvement of consumption potential new energy assisted by thermal system, coupling and tightness power heat supply are continuously strengthened. Higher requirements put forward for probability prediction load. In existing research, point models usually established according to relevant characteristics which is difficult reflect influence uncertainty load electrical-thermal on result. view this, a probabilistic forecasting method short-term considering proposed. Firstly, collected...