Engineering
2014-03-31
Introduction
Design engineers should consider several factors in three-design stage. Respectively, every configuration has its characteristics with in regards to reliability, the initial cost, maintenance cost, as well as simplicity among other evaluative tags. Design engineers have to analyze the situation with respect to these aspects of performance before deciding on the bus configuration to adopt. Nevertheless, defining the consistency of a substation may likewise be the essential for current system connections as it may better aid in pinpointing the very weak points that may be help to overall system irregularity.
There is a mere logic in that every condition may suit one particular configuration relative to the other. Therefore, it is important to recognize comparative parameters and the ways in which these parameters configurations measure to capacity. In advance, embarking on defining dependability, the simple resolve of the valuation ought to be evident as this may affect the choice of which method is used to determine reliability. A method may look at how substation reliability affects the overall system reliability, how the system reliability affects substation reliability.
Perhaps, divergent bus configurations yield different returns from the system, consequently, depending on the requirements of the system, the relative bus configuration is chosen. For that matter, to demonstrate the selection and corresponding evaluation process, a comparative analysis of three different bus configuration systems, say X, Y, and Z, is necessary. Let, for instance, X is a single bus system, Y is the double bus system, and Z is the double breaker bus system. The purpose of this manuscript is to provide the comparison and contrast of X, Y, Z substations while it will provide the advantages and disadvantages as well.
Comparison
While it is imperative to establish the structural differences exhibited upon each system, X compares in the way that it depicts the simplest configuration supporting feeders and transformer bay connected to a single bus. The reliability of X prearrangement is seemingly moderate; therefore, the cost is moderate. To its advantage, there is a moderate area with more components to manage.
Alternatively, Z establishes double bus in that it obtains a higher level of dependability while every feeder is double connected through an inaccessibility system in recognized via isolators. To its advantage, bendable, inaccessible, double-feed to every circuit while to its disadvantage, there is an extremely higher cost with only two breakers for each circuit. Additionally, the pros aligned with Z bus is that of any probable letdown of a single bus (X) for example, will not affect any of the lines. Besides, the upkeep of the bus or the circuit breaker within such prearrangement could be successful without any surreal interrupting upon any circuits.
Likewise, the Z prearrangement permits numerous functioning possibilities while there are additional lines implemented into such prearrangement – some of which will include system loading a modification by way of line connection via one bus. A double bus, double breaker arrangement is rather expensive, as each the line consist of two breakers and requires more zone for the substation to house the extra apparatus. Particularly this is a truism simply due to the interactivity of low profile configuration. Ultimately, the defense system is more involved than the single substation.
Although the Y bus is highly reliable - a single circuit failure separates single circuit while it defends from bus station failures preventing from affecting the circuit. In that regard, it retains elasticity in functioning with maintenance of transfer. Pros is that it is moderate in cost and a low area of requirement retaining lesser components to manage. To its advantage, lower again, cost efficacy, while to its disadvantage, will cause an outage of an entire system.
Conclusively, it is evident that the design of a substation is dependent upon the criticality of the load and the cost and other factors in that particularly each construct has its advantages and disadvantages that guide the selection process. Analyzing the best possible choice of bus configuration will be reliant on the comparative advantages particular configuration offers and hindered as well, by the limitation it offers. X has the lowest cost in terms of installation and maintenance owing to its simplicity. It also covers a small land area and offers provisions for easier expansion if there is need therefore, a comparative series of the configuration costs of X, Y and Z will follow the same chronological order as depicted above. This manuscript has delivered the comparison and contrast of X, Y, Z substations while it will made available the advantages and disadvantages as well.
