Future large-scale high-performance computing clusters will face a power wall where the peak power draw of these clusters exceeds the maximal power-supplying capability of the surrounding infrastructure. To use the limited power budget efficiently, we developed a dynamic strategy to tackle execution time imbalance issues through power shifting and frequency limitation. By applying this strategy to NPB OpenMP benchmarks, we succeed in a continuous enforcement of power draw under a specified power cap. At the same time, execution time is reduced by up to 12.8% and the energy to solution is reduced by up to 12.3compared to a native power strategy.