Supply Peak Power Optimization

Supply Peak Power Optimization minimizes the Supply Peak Power in Shared Bus applications by finding the best balance of energy storage while optimizing four parameters - Infeed Peak Power Supply [Pps] and Regen [Ppr] limits, and the Target Bus Lower and Upper Voltages [Vt0, Vt1]. In the ideal case, the Supply Peak Power [Pmax] is reduced to a low constant power over the entire cycle.

'Supply Peak Power Optimization' is available in the PRO version.

This feature requires:

Active Infeed

  1. Controlled DC Bus voltage (ie. active Infeed, not passive)
  2. Programmable DC Bus Target Lower [Vt0] and Upper [Vt1] voltages
  3. Programmable Nominal [V0] and Threshold [V1] voltages
  4. Programmable Peak Power Limit for Supply [Pps] and Regen [Ppr]

Passive Infeed

  1. A "Peak Power Shaving Module" to react to and limit the Mains Supply current.
  2. A Passive Infeed cannot target a bus voltage. Therefore, set Vt0=V0 and Vt1=V1, and no Regen Power Limit.

[Start]: Find Lowest Peak Power using [Pps], [Ppr], [Vt0] and [Vt1]

Click the [Start] button to find the lowest peak power by adjusting the four variables [Pps], [Ppr], [Vt0] and [Vt1].

Depending on the application, up to 3 solutions may be found:

 1) Lowest Peak Power
 2) Lowest Peak Power No Regen
 3) Lowest Const Peak Power

Note: This function uses [Cbus] and [Cess] as specified, but does not change them.

Infeed Peak Power Limit for Supply [Pps] and Regen [Ppr]

Use the Infeed Peak Power Supply [Pps] and Regen [Ppr] limits to throttle the power flow to/from the DC bus to reduce the Peak Power to/from the Mains Supply.

If the application requires more power than can be delivered by the combination of the peak power limit(s), DC Bus and ESS (if available), then the peak power limit(s) will be exceeded to meet the application demand. As such, enough DC Bus and/or ESS energy storage is essential to manage and reduce the Infeed Peak Power.

Target Bus Voltages [Vt0, Vt1]

Increasing the Target Bus Lower Voltage [Vt0] increases the amount of energy stored on the DC bus that can be used to feed the application when the supply is limited. This can reduce the on-demand peak power from the Mains Supply. Decreasing the Target Bus Upper Voltage [Vt1] leaves energy storage room on the DC Bus to absorb braking energy. This can reduce the regen power fed back to the Mains Supply. Depending on the application, increasing Vt0 may push more energy to regen or braking via a bleeder. But in certain applications, it can be very advantageous to operate at Vt0 > V0.

Voltage levels are limited per the following:

     V0 <= Vt0 <= Vt1 <= V1

Additional Capacitance for DC Bus [Cbus] and Energy Storage Solution [Cess]

For quick scenario analysis, increase or decrease the DC Bus and Energy Storage Solution capacitance by [Cbus] and [Cess].

Note that [Cess] is only available when an ESS is in the Power Group.

Click to find additional capacitance for optimal energy storage and minimal supply energy.

[Cbus] & [Cess] can be negative, however, the total capacitance must be >=0F. For final design, select products with additional capacitance such that [Cbus]=0 and [Cess]=0.

Sample Projects

Vertical Press with Continuous Supply Power
Peak Power Optimization can also be used for Standard Applications

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