Reliserv Solution
Reliserv Solution
Panvel, Navi Mumbai, Maharashtra
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Relay Co-ordination And Control System Studies

Protection and control aspects are essential for the operational performance of power supply systems and thus also integral parts of planning studies. A sound analysis of requirements, of the current system and of relevant operating scenarios, the development of appropriate schemes and the detailed coordination of individual relays and equipment ensure that operational performance targets are achieved.

System Harmonics Study

System Harmonics Study
  • System Harmonics Study
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Service Typeon

Studies will be carried out which simulates resonance and harmonic distortion in the plant. Harmonic current and voltage sources are to be defined at multiple locations in the power system. Capacitor banks, single tune filters and high pass filters included in the voltage and current distortion evaluation, impedance resonance scans, and in harmonic load flow results. The power distribution system will be examined prior to construction and the harmonic effect addressed during the design with the use of corrective filter designs evaluated prior to installation. All major buses and branches will be evaluated for harmonic content and for resonant impedance characteristics.

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System Transient Stability Analysis Motor Starting

System Transient Stability Analysis Motor Starting
  • System Transient Stability Analysis Motor Starting
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Operating Systems Windows

The following studies will be carried out under the system conditions stated :-

(a) Stability power system and captive generators with a fault on each bus bar.

(b) Voltage variations at busbars for drives start up of the largest rated motor with all other drives at standstill (static).

(c) Voltage variations at busbars for drives start up the largest rated motor with all other drives running (dynamic).

(d) Motor Reacceleration study.

(e) Determination of tap settings for the transformers.

(f) Load acceptance of the small Generator.

(g) Suitability of starting of largest motor for different modes of operations.

(h) Response of Power System and generators including frequency variation, voltage variation due to outage of any of the operating generator with normal connected load on the system.

(i) The dynamic performance of the system with respect to the following minimum disturbances will be studied.

Ø  External Faults

Ø  Internal Faults

Ø  Load Throw off conditions

Ø  Performance of generators with without Grid.

Ø  Dynamic behaviour of Turbo Generators (including generators) in terms of Load Flows Load Sharing during Islanded condition. Internal external disturbances will be reported to establish critical clearing time and set protections accordingly, in case of fault, to avoid tripping of Generators.

(j) Load-shedding scheme

Ø  Appropriate load shedding scheme will be suggested based on the criticality of loads.

(k) Islanding scheme to save captive generation during grid disturbance will be suggested. The dynamics of the system will be studied with respect to grid disturbances and the settings of the frequency, voltage relays will be provided .

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Short Circuit Study

Short Circuit Study
  • Short Circuit Study
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Voltage Typeon

The following types of fault will be simulated:

(a)       Three phase symmetrical fault

(b)       Line to Line fault

(c)       Line to Earth fault

(d)       Line to line to Earth fault

The following output data will be presented as a minimum for all short circuit fault studies:

(a)       Initial symmetrical fault current (l”k)

(b)       Peak asymmetric fault current (lp)

(c)       Symmetrical breaking current (lb)

(d)       Steady state short circuit current (lk)

(e)       Percentage dc component (ldc) (only presented for balanced 3-phase

faults)

Short circuit currents on each busbar and line will be used to establish the interrupting and momentary ratings of circuit breakers, MCCBS, fuses and other switching devices at busbars and feeders.

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Relay Coordination

Relay Coordination
  • Relay Coordination
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Our firm is involved in providing an extensive series of Relay Coordination. Experts make this product as per industry standards using the best quality material and advanced technology.

 

Features:

 

  • Top performance

  • Affordable rates

  • Durability

  • High strength

  • Easy to use

  • Longer working life


Relay Coordination:

  • 1.0 Electrical Power System Studies using ETAP software:
  • 1.1 Load Flow and Short Circuit Studies.
  • 1.2 Transient Stability Study.
  • 1.3 Relay Settings calculations & Coordination Study.
  • 1.4 Motor Starting Study.
  • 1.5 Harmonic Analysis.
  • 1.6 Grid Islanding and Load Shedding.
  • 2.0 Electrical Detail Engineering:
  • 2.1 Electrical Equipment Sizing calculations.
  • 2.2 Preparation of Electrical Single Line Diagram.
  • 2.3 Preparation of Substation Layout.
  • 2.4 All indoor & outdoor cable route layouts.
  • 2.5 HT and LT cable sizing and scheduling.
  • 2.6 Transformer sizing calculation.
  • 2.7 Capacitor sizing calculation.
  • 2.8 Design of Lighting system.
  • 2.9 Design of Earthing and Lightning System.
  • 2.10 Vendor Drawings Review.
  • 2.11 Preparation of MTO, Specifications and MR
  • 3.0 Training on Power system protectionâ€
  • Overcurrent and Unit (Motor/Transformer/Generator) Protection
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Relay Coordination Study

Relay Coordination Study
  • Relay Coordination Study
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Studies will be carried out which demonstrate co-ordination and discrimination of protective devices in such a manner that a fault appearing at a given point in the system is cleared by the protective device immediately upstream of the fault and by that device alone. Circuit Breakers upstream of the operated protective device will not be tripped.

Maximum and minimum symmetrical short circuit currents at each busbar and feeder line will be used in establishing settings for protective relays and devices.

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  • Minimum Order Quantity: 1 Piece
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Power Factor Correction for Relays

Power Factor Correction for Relays
  • Power Factor Correction for Relays
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The following studies will be carried out under the system conditions stated:

1. Stability power system and captive generators with a fault on each bus bar.

2. Voltage variations at busbars for drives start up of the largest rated motor with all other drives at standstill (static).

3. Voltage variations at busbars for drives start up the largest rated motor with all other drives running (dynamic).

4. Motor Reacceleration study.

5. Determination of tap settings for the transformers.

6. Load acceptance of the small Generator.

7. Suitability of starting of the largest motor for different modes of operations.

8. The response of Power System and generators including frequency variation, voltage variation due to an outage of any of the operating generator with normal connected load on the system.

9. The dynamic performance of the system with respect to the following minimum disturbances will be studied.

· External Faults.

· Internal Faults.

· Load Throw off conditions.

· The performance of generators with without Grid.

· Dynamic behavior of Turbo Generators (including generators) in terms of Load Flows Load Sharing during Islanded condition. Internal external disturbances will be reported to establish critical clearing time and set protections accordingly, in the case of a fault, to avoid tripping of Generators.

10. Load-shedding scheme

11. Appropriate load shedding scheme will be suggested based on the criticality of loads.

12. Islanding Scheme to save captive generation during grid disturbance will be suggested. The dynamics of the system will be studied with respect to grid disturbances and the settings of the frequency, voltage relays will be provided.

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  • Minimum Order Quantity: 1 Piece
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DC Load Flow Study

DC Load Flow Study
  • DC Load Flow Study
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Load flow studies will be carried out with the Plant operating at normal/worst and rated load operating conditions. Load studies for all conditions of operation will be carried out based upon anticipated demand (load schedule) of the Peak Valley of low voltage high voltage Bus systems.

The following output data will be presented as a minimum for all load flow studies

· Busbar voltages in terms of per unit of busbar rated voltage and phase.

· Real and reactive components of power flow past a point in the system, i.e. Busbar and feeder in MW and Mvar.

· MW and Mvar losses at the optimum transformer tap settings. The optimum tap setting being that which ensures at minimum load and full load, the voltage remains within specified tolerance limits (+/- 5% of the rated busbar voltage).

· Loading of all the branches (transformers, cables etc.) in terms of % of their rated capabilities.

· Total system demand, losses, and loading of the network in MW and Mvar.

· Power factor at each busbar.

· Voltage drop in feeder circuit cables.

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Piyush Rathi (Partner)
Office No. 9, Plot No. 53/54, Space Heights Sector 34
Panvel, Navi Mumbai- 410209, Maharashtra, India



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