state space representation of power system

... electrical connectivity of each component of the system. Essentially, the ETN operates based on the information regarding the states of the components, e.g. open/closed for circuit breakers, out -of- order/working ... consequences depending on the power system state. In conclusion, the reliability of protection schemes, understood as the union of dependability and security, and its dependency on the system operating conditions, ... designing modern power systems [12]. The Petri Net (PN) paradigm is suitable to represent event- driven systems, which are characterized by a set of states (configurations) and a set of evolution...

Ngày tải lên: 03/01/2014, 19:35

... locally. Secondly, the main role of reactive power is to maintain voltage stability/security of power systems. The effect of reactive power on system reliability in terms of energy not supplied is ... the system. Generation bus 1 consists of 4ì60MW units. Generation bus 2 consists of 3ì40MW units. In order to illustrate the effect of reactive power reserve on system reliability, the system ... reactive power from active power in power system operation. Firstly, it is not efficient to transfer reactive power over a long distance because the reactive power loss in transmission system...

Ngày tải lên: 03/01/2014, 19:39

... any of the addressees because of the missing step it contains. The unification and control functions of the molecular machine together define a particular conception of phonological rule systems, ... connectionist simulation system running on Olivetti M24/M28 PCs. However, owing to the capacity of the machines (and of TLC Lisp, in which the system has been written) the number of molecules is extremely ... feature system. In terms of the above, the features of plural nouns and Dluralia tantum are identical, in spite of the link prohibition concerning the 'Non-Singular' feature of the...

Ngày tải lên: 18/03/2014, 02:20

Ngày tải lên: 19/08/2014, 11:46

Ngày tải lên: 19/08/2014, 12:33

... reliability of the power system will be analyzed by the multi -state system theory in this paper. The procedure of applying the multi -state system theory to the reliability analysis of the power system ... generating function of the system; is the number of subsystems in the system; N sys M is the number of possible states of the system; s G is the performance of the system; s q is the ... multi -state system theory is introduced to analyze the reliability of a power system. States and corresponding probabilities of the battery are defined. The reliability of the power system...

Ngày tải lên: 03/01/2014, 19:38

... Lesson 15-The power systems of Diesel Engine The power systems of a diesel engine are a primary part of a power plant, the function of which is to guarantee proper operation of the power plant ... mainly consist of F. O. system, L. O. system, cooling system and compressed air system. Let us deal with them one by one. 1. The Fuel Oil System The basic mission of F. O. system is to supply ... functions of F.O .system can be described as feeding,transferring,purifying, measuring and supplying. 2. The Lube Oil System The task of lube oil system is to provide the surfaces of different...

Ngày tải lên: 17/10/2013, 15:15

Ngày tải lên: 25/12/2013, 10:38

Ngày tải lên: 03/01/2014, 19:36

Ngày tải lên: 03/01/2014, 19:39

... aspects of the various elements of the system [2].In general, the system is of two types (depending on the structure of the system) , a simple structure system and a complex structure system. ... kV transmission line power system that energized by 33 kV system reduces the reliability of the system. Therefore, in order to improve the reliability of the 132 kV power systems, these lines ... Sulaimani-Erbil Electrical Power System Reliability Evaluation Fig.8 shows the single line diagram of the 132 kV systems for Sulaimani-Erbil electrical power system. For the purpose of reliability...

Ngày tải lên: 03/01/2014, 19:39

... lines to be considered in the power system network. In each state, the complementary relationships can be determined. For instance, given the state of the three lines of interest as 1, 1, 0, (37)$(39) ... limits and real power flow limits of the network branches are the two typical conditions imposed to the power system for operating in a secure normal state. In addition, real and reactive power generation ... electricity is generated. Actual power flows of the network wires are governed by the Kirchhoff laws, which makes transmission of power different from the transportation of an ordinary commodity in...

Ngày tải lên: 18/02/2014, 22:20

... the system in terms of their ability to concen- trate on the instruction (Q3), in terms of their incli- nation to reuse the system (Q6) and in terms of the system s matching of their expectations ... interacted with the system both with and without the NM (Section 4). Our analysis of the users’ subjective evaluation of the system indicates that users prefer the version of the system with the ... dialogue system evaluation (e.g. (Walker et al., 2000)) and measure user’s overall perception of the system. We find that the NM presence significantly improves user’s perception of the system...

Ngày tải lên: 20/02/2014, 12:20

... Aspects of Wind Power Systems26 simulator consists of multiple RACKs, each of which consist of both communication and processor cards and are linked by a common backplane. To solve a large power system network, ... salient features of this study. Results of RTDS are compared with Laboratory standard power system software PSCAD/EMTDC and the features of using RTDS in dynamic characteristics analyses of wind farm ... diagram of VSC based STATCOM. With suitable adjustment of the magnitude and phase of the VSC output voltage, an efficient control of power exchange between the STATCOM and the ac power system...

Ngày tải lên: 07/03/2014, 11:20

... The derivation of E2* manifests first-degree center embedding of the category S*, as a result of the treatment of S as both a prefix and a suf- fix in G2*. However, no derivation of an affixed ... pretation of the expression as a whole. This completes our demonstration of the abil- ity of affixed strings to represent the structural descriptions of the acceptable sentences of a na- tural ... evidence for the identification of that constituent; e.g., if the leftmost daughter is either the specifier or the head of that constituent in the sense of Jacken- doff (1977). Third, we may suppose...

Ngày tải lên: 08/03/2014, 18:20

... levels of representation. FST systems are conceptually bidirectional; they may easily be processed in either direction with the same finite state mechanism; the problem of the recoverability of ... bottom up chart parsing, can also be seen as a system of parallel finite state filters. The PSI (Parallel Sequential Incrementation) system of pro- sodic analysis being developed by myself ... properties of the tone sandhi systems of Tern and Bade very clearly, in particular the contextual dependencies (sandhi). The reverse (recognition) simulations show the ef- fects of tone neutralization:...

Ngày tải lên: 18/03/2014, 02:20

... improving the efficiency of the machine, quality of the output power and the stability of the system. Synchronous generators are responsible for the bulk of the electrical power generated in the ... development of advanced controllers for power electronics. The first section of the book contains a brief review of control strategies for electric drives /power systems and a summary description of neural ... for drives and power systems. Electric motors and power systems 19 nozzle can ensure a variable flow of fluid, but at the cost of decreasing the motor efficiency. A VSD is capable of performing...

Ngày tải lên: 18/04/2014, 12:29

... instability) of the y = 0 solution of Equation 3.5 implies stability (or instability) of x ¯ ( t ) of the system (Eq. 3.1 ). φ t (x) X ˆ U X Figure 3.2 An illustration of the defi nition of asymptotic ... acceptable steady state. A simulated system trajectory of a large - scale power system transient stability model is shown in Figures 2.1 and 2.2 . The simulated system trajectory is composed of the predisturbance ... capability of transmission grids. The accuracy of stability analysis, however, largely depends on the validity of system models employed in describing power system dynamic behaviors (here, system...

Ngày tải lên: 30/05/2014, 23:38

... measuring the performance of noise reduction systems. Synthetic stimuli are proposed as test signals, because they can be tailored to the parameter space of the noise reduction system under test. The ... speech is available for verification of transfer characteristics of tele- phony equipment. In that case, again the speech performance of the system under test is of major interest, whereas the noise reduction ... magnitude of a system s frequency response becomes independent of the system s throughput delay when using a periodic stimulus, becausewithinagiventimeframewhoselengthisan integer number of periods,...

Ngày tải lên: 21/06/2014, 22:20