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Reestablishment in power system brings in significant transformation in the power sector by extinguishing the possession of sound consolidated assistance. However, the collaboration of various manufacturing agencies, autonomous power manufacturers, and buyers have created complex installation processes. The regular active load and inefficiency of best measures among varied associates is a huge hazard. Any sudden load deviation will give rise to immediate amendment in frequency and tie-line power errors. It is essential to deal with every zone’s frequency and tie-line power within permitted confines followed by fluctuations within the load. Therefore, it can be proficient by implementing Load Frequency Control under the Bilateral case, stabilizing the power and frequency distinction within the interrelated power grid. Balancing the net deviation in multiple areas is possible by minimizing the unbalance of Bilateral Contracts with the help of proportional integral and advanced controllers like Harris Hawks Optimizer. We proposed the advanced controller Harris Hawk optimizer-based model and validated it on a test bench. The experiment results show that the delay time is 0.0029 s and the settling time of 20.86 s only. This model can also be leveraged to examine the decision boundaries of the Bilateral case.