Two AC generators are operating in parallel...

Question 1 / 205eccefa4bacbc34ba4d481cf

Question 1 of 205eccefa4bacbc34ba4d481cf

Two AC generators are operating in parallel and both are equipped with automatic voltage regulators. While standing watch, one generator is noted as having a greater lagging kvar value. In order to equalize the kvars between the generators manually, what should be done?

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🔍 Key Concepts

• Reactive power (kvar) sharing between generators in parallel • Effect of automatic voltage regulators (AVRs) on reactive power vs. governor speed control on real power (kW) • Relationship between terminal voltage and power factor / kvar flow in parallel AC generators

💭 Think About

• When two generators are in parallel, which control (speed governor or voltage regulator) is primarily responsible for changing kW load and which is responsible for kvar / power factor? • If one machine is carrying more lagging kvar, what change would you make to its terminal voltage relative to the bus to reduce its reactive power contribution? • Think about what happens to kvar sharing if you raise the voltage on one generator while keeping the other constant, versus lowering it.

✅ Before You Answer

• Verify which adjustment affects real power (kW) versus reactive power (kvar) when generators run in parallel • Confirm that increasing generator terminal voltage tends to increase lagging kvar load carried by that generator • Confirm that the correct manual action must involve changing voltages, not speeds, to balance kvar sharing

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Question 1 of 20

increase the speed of the generator with the largest kvar while decreasing the other generator speed

decrease the speed of the generator with the largest kvar while increasing the other generator speed

increase the voltage of the generator with the largest kvar while decreasing the other generator voltage

decrease the voltage of the generator with the largest kvar while increasing the other generator voltage

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Question 1 / 205eccefa4bacbc34ba4d481cf

Question 1 of 205eccefa4bacbc34ba4d481cf

Back

Question 1 of 20

5eccefa4bacbc34ba4d481cf

No comments yet

Be the first to share your thoughts!

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🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed