Which farm loads should receive priority when wind generation is limited?

The short answer

Set priorities according to the consequences of interruption and the actual operating flexibility of each farm process. A low-energy load can be critical, while a larger pumping duty may be movable within a defined window. Wind generation alone does not determine the order. The farm’s process and electrical teams must agree which services remain protected, which can wait and which controls are permitted before a wind contribution is allocated to particular loads.

Classify service before calculating offsets

Separate continuous functions, fixed-time operations, weather-dependent duties and discretionary loads. The classification depends on the real farm: ventilation may become urgent under some conditions, while irrigation may have limited flexibility set by crop and water requirements. Avoid using a generic priority list as an operating instruction. Record who can authorize changes and what happens if expected wind is unavailable.

A planning-day comparison

Assume four measured duties require 14 kWh for fixed-time milking, 12 kWh for a movable pumping task, 6 kWh for weather-dependent ventilation and 8 kWh for continuous base services. Total demand is 40 kWh. A hypothetical 24 kWh of available wind cannot simply be assigned to the first 24 kWh on a list. Its timing, power and accepted connection must match the duty it is intended to serve.

Evaluate two operating cases

Compare the existing schedule with an explicitly approved alternative that moves the pumping task. Keep fixed and protected duties unchanged. Calculate imported energy, accepted wind energy and any surplus in aligned intervals. This identifies whether flexibility adds useful generation without confusing it with a promise of uninterrupted wind supply. Include any extra energy required to catch up after a deferred operation.

Put responsibilities into the system scope

Name the equipment that controls generation and the equipment that manages loads. A turbine controller is not automatically a farm-wide energy-management system. Confirm the available interfaces, protection and fault behavior for the proposed package. MARSTON can discuss turbine, controller and converter supply, but process priorities and any external storage or backup integration must be defined for the actual installation.