Zero-carbon parks have broad prospects in carbon neutralization. As an energy hub

hydrogen energy storage plays an important role in zero-carbon parks. However

the nonlinear characteristics of hydrogen energy storage systems (HESSs) have a significant impact on the system economy. Therefore

considering the variable working condition characteristics of HESSs

a hybrid operation method is proposed for HESS

to support the efficient and economic operation of zero-carbon parks

by analyzing the operating principle of a zero-carbon park with HESS

the system structure framework and variable condition linearization model of the equipment in HESS are established. Moreover

considering the energy output characteristics of hydrogen energy storage equipment under variable working conditions

a multimodule hybrid operation strategy is proposed for electrolytic and fuel cells

effectively meeting the thermoelectric load demand of zero- carbon parks in different scenarios. Finally

the economy of the proposed hybrid operation strategy was verified in typical scenarios

using a zero-carbon park embedded with a HESS.