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Recent content by MarcMarc22

  1. MarcMarc22

    Compare Excitation Systems

    Hello Waross, It`s still applicable to small units, however, as you said you will see way more rotating exciter on a small machine because it's way cheaper. As for the PMG you stand very correctly, having the PMG give you some fault ride through capability. Since the machine has inertia...
  2. MarcMarc22

    Compare Excitation Systems

    Hello rockman7892, As you mentioned there are 2 great categories of excitation system : 1) Full Static : This is the most common. Typically an excitation transformer will be shunt fed by the generator output, then that transformer will feed the excitation bridges that will convert the AC...
  3. MarcMarc22

    Compare Excitation Systems

    Hello oresakri, First of all, you need to know what is the unit rated field current (at rated MW, Rated PF). Then, a good rule of thumbs is to add a margin on that value. Then with that value, that would determine the bridge size you need (vendors have different bridge size to reduce the cost...
  4. MarcMarc22

    Reactive Droop Compensation vs PF & AVR

    Hello ffllyyeerr Maybe you already know, but just to add to your knowledge, a reactive droop compensation behave in a way that will prevent / reduce MVars sharing between units. The typical case where this will be used is where you have 2 units sharing the same step-up transformer. (2 or more...
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