AEL-HPSG Application Aux Générateurs Synchrones de Grande Puissance

HIGH POWER SYNCHRONOUS GENERATORS APPLICATION - AEL-HPSG

SYSTEMES INNOVANTS

The High Power Synchronous Generators Application, "AEL-HPSG", has been designed to study the procedure and the maneuversrequired for the synchronization of synchronous generators with the grid, with the aim of delivering the generated energy as done in actualpower plants.

Voir description générale

NOUVELLES LIÉES

Description Générale

The High Power Synchronous Generators Application, "AEL-HPSG", has been designed to study the procedure and the maneuversrequired for the synchronization of synchronous generators with the grid, with the aim of delivering the generated energy as done in actualpower plants.

The "AEL-HPSG" application allows the user to go deeper into the working principles and control of synchronous generators to show thestep-by-step synchronization process with the electrical grid. For this, the applicationincludes a synchronous generator coupled to a motor (which will act as drivingforce, simulating a turbine) along with a series of modules such as a single-phasetransformer, an AC/DC converter and a voltage regulator which form the generatorexcitation circuit. It is also included an analog overcurrent relay as grid protectiondevice and a network analyzer to monitor the generation electrical parameters suchas the active and reactive powers generated, frequency, voltage, current, power factor, etc.

This application offers two possibilities regarding the generation group control. The first option, the manual control of synchronousgenerators kit, includes modules for the motor speed control (turbine) and a PWM signal generator module for the control of the synchronous generator excitationcurrent (and therefore the output voltage). This enables the user to carry out theno load, under load and short circuit test aimed to obtain the characteristic curvesand the equivalent circuit of the synchronous generator. This kit also includes asynchronization module which will allow the user to monitor and carry out manually the synchronization process. For that, the synchronization module has two analog voltmeters (grid and generation voltage), two frequencymeters (grid and generator frequency), a digital synchroscope and two push-buttons for closing and opening the synchronization switch.

The second option, the synchronous generator automatic control module, offers the possibility to control automatically every electricaland mechanical parameters of the generator-turbine group. The most signifcant control parameters are the turbine speed, the generator frequency, the excitationcurrent, the voltage at the generator output and the active, reactive and apparentpowers. Moreover, this control module is at the same time an advanced protectionfor generators and turbines. It meets the ANSI standards regarding the protection parameters for generators and turbines (ANSI 81O, ANSI 81U, ANSI 59, ANSI 27,ANSI 50/51, ANSI 32R/F, ANSI IOP 32, ANSI MOP 32, ANSI 46, Voltage Asymmetry, Generator Ground Fault, Phase Rotation, ANSI IEC255 , Generator Lagging Power Factor, among others). It is required to acquire at least one of the two previously described options to be able to work with the modules included in the base unit.

In order to acquire a greater experience with the study of synchronous generators, it is recommended to acquire a set of resistive andinductive loads with the aim of studying the stand-alone operations of synchronous generators (isolated from the national grid). Theseloads will allow the user to go deeper into the basic concepts about the behaviour of synchronous generators working under load, suchas generation and demand in isolated systems, voltage drops or the output voltage control by means of the excitation current regulation.

It is also recommended to acquire a kit for the study of faults in synchronous generators, consisting of an advanced differential protectionrelay with configurable numerical programming which allows showing the features of three-phase differential protection, two power switchmodules as interrupting devices, a fault injection module for the injection of single-phase, two-phase or three-phase, to earth, faults anda module with three-phase inductances as buffering element for the faults at the generator induced side.

In addition, it is recommended as well a rotor protection module for the study of faults at the synchronous generator excitation side and athree-phase harmonic filter for the reduction of the harmonics resulting from the regulation of the generator excitation current.

The "AEL-HPSG" is one of the most complete and versatile applications regarding the in-depth study of synchronous generators, both inisland and parallel to grid operations. Furthermore, it is compatible with any type of energy transmission line which makes it possible tostudy the impact of synchronous generators on real grids, analysing events such as power transfer among several machines working inparallel, sudden decouplings and its consequences and endless meanuevers related to electric generators.

Finally, for the most optimal management of the application, it is recommended the Energy Manager and Data Acquisition Software. Thisawesome tool allows the user to monitor all the curves for the grid and generator electrical parameters, watch the voltage drops, energy losses in transmission lines and voltage drops. In addition, it allows saving all the acquired data to watch and compare it later. It is possibleo see clearly and with accuracy the effects of reactive power compensation on the monitored power curves, maximum and minimumenergy demand, load unbalances and the variation of the power factor in the nodes of the system.

Des exercices et pratiques guidées

PLUS D'EXERCICES PRATIQUES À EFFECTUER AVEC CETTE ÉQUIPEMENT

Practical possibilities in case of acquiring the kit for the manualcontrol of the Turbine-Generator group , HPSG-K1:

  1. Manual control of the generator-motor group speed andfrequency.
  2. PWM signal generation and duty cycle manual regulation.
  3. Assembly of the self-excited static excitation circuit.
  4. Manual control of the synchronous generator voltage by means of the excitation current control through PWM signals.
  5. Startup of the synchronous generator under no load.
  6. Manual synchronization of the synchronous generator with thegrid.
  7. Synchronization through the dark lamps method.
  8. Synchronization through the bright lamps method.
  9. Synchronization through two dark and one bright lampsmethod.
  10. Monitoring the power flows injected into the grid.
  11. Active power (P) and reactive power (Q) generation control insynchronism with the grid, by means of the generator frequencyand excitation current control respectively.
  12. No load test of the synchronous generator.
  13. Empirical obtaining of the synchronous generator no loadcharacteristic, E= f (Iex). Lineal and saturation zone.
  14. Short-circuit test of the synchronous generator.
  15. Empirical obtaining of the synchronous generator short-circuitcharacteristic.
  16. Calculation of the Poitier's diagram.
  17. Calculation of the synchronous generator impedance.
  18. Determining the equivalent circuit of the synchronousgenerator.
  19. Calculation of the synchronous generator capacity limits.
  20. Control logic circuit for the protection of the synchronousgenerator in synchronism with the grid.
  21. Measurement of the harmonic generation caused by the powerelectronic.

Practical possibilities in case of acquiring the module for theautomatic control of the Turbine-Generator group, N-ERP-PGC01:

  1. Automatic control of the generator-motor group frequencyand speed.
  2. Assembly of the self-excited static excitation circuit.
  3. Adjustable automatic control of the synchronous generatoroutput voltage.
  4. Automatic synchronization of the synchronous generator withthe grid.
  5. Monitoring the power flows injected into the grid.
  6. Adjustable automatic control of the active power injected intothe grid.
  7. Control logic circuit for the protection of the synchronousgenerator in synchronism with the grid.

Practical possibilities in case of acquiring the kit for the islandoperation of the generator, RL-KIT-1:

  1. Island operation with manual/automatic control of thegenerator-motor group.
  2. Study of the generation and demand in isolated systems.
  3. Study of the voltage drops in sycnhronous generators andcompensation through manual/automatic regulation of thegenerator excitation current.
  4. Test for obtaining the external characteristic of the synchronous generator, V = f (I).

Practical possibilities in case of acquiring the kit for the study offaults in sycnhronous generators, GFS-KIT-1:

  1. Overcurrent protection test with the generator in synchronism with the grid.
  2. Overcurrent protection test with the generator in island operation.
  3. Differential protection relay setting.
  4. Study of the scheme for the differential protection of the synchronous generator in case of fault.
  5. Study of single-phase, two-phase, three-phase, to earth, with and without impedance faults.
  6. Study of the differential protection against instantaneous overcurrent (50P1H).
  7. Study of the differential protection against definite time overcurrent (50P1).
  8. Study of the differential protection against inverse time overcurrent (51P1).
  9. Study of the differential protection against definite time negative sequence current (50Q1).
  10. Study of the differential protection against inverse time negative sequence current (51Q1).
  11. Study of the differential protection against instantaneous residual current (50N1H).
  12. Study of the differential protection against definite time residual current (50N1).
  13. Study of the differential protection against inverse time residualcurrent (51N1).
  14. Transient analysis of fault injection by means of the differential relay manufacturer's software.

Practical possibilities in case of acquiring the rotor earth-fault protection module, N-REP:

  1. Study of the scheme for the rotor protection of a synhcronous generator in case of fault.
  2. Rotor earth-fault protection test.

Practical possibilities in case of acquiring the three-phase harmonic filter, N-THF01:

  1. Study and monitoring the harmonics generation.
  2. Harmonic reduction by means of a three-phase passive filter.

Some practical exercises with the Energy Manager and Data Acquisition Software, EMG-SCADA:

  1. Remote manual control of voltage and frequency of the synchronous generator.
  2. Remote automatic control of voltage and frequency of the synchronous generator.
  3. Remote automatic synchronization operation of the synchronous generator and the grid.
  4. Real time monitoring of the induction generator frequency, current and voltage values and wave forms.
  5. Real time monitoring of the generated active, reactive and apparent powers.
  6. Visualization of the phasor diagrams of the system electrical parameters.
  7. Data saving and storage.
  8. Comparison of the obtained results.
  9. Several other exercises can be done and designed by the user.
Voir plus

UNITÉS SIMILAIRES DISPONIBLES

Qualité

Service après vente