Power management and decomposition method of renewable energy direct current hydrogen production island system

Abstract

The invention provides a power management and decomposition method for a renewable energy direct-current hydrogen production island system, which comprises the following steps of: 1, establishing a static and dynamic model of an electrolytic cell, determining static and dynamic response characteristics of the electrolytic cell, and obtaining a dynamic response analytical equation of the electrolytic cell; 2, determining a power management method of the renewable energy direct current hydrogen production island system; 3, providing a renewable energy source and hydrogen production unit power instruction decomposition method by considering the dynamic response characteristics of the electrolytic cell; 4, control methods of the wind power generation unit, the photovoltaic power generation unit, the hydrogen production unit and the storage battery energy storage unit in different operation modes are determined; and step 5, determining the control architecture of the renewable energy direct current hydrogen production island system. The system stability is ensured under the condition that the energy storage capacity configuration is limited, the power of the hydrogen production unit is flexibly adjusted through the distribution coefficient, the control mode switching of the storage battery energy storage unit and the renewable energy power generation unit is avoided, and the complexity of coordination control of the wind and light hydrogen storage system is reduced.

Description

technical field [0001] The invention belongs to the technical field of energy utilization, and in particular relates to a power management and decomposition method of a renewable energy direct current hydrogen production island system. Background technique [0002] Energy crisis and environmental pollution are important factors restricting the rapid economic development of all countries in the world. Optimizing energy allocation, promoting energy transformation, and increasing the proportion of renewable energy power generation are important measures to achieve the great goals of "carbon peaking" and "carbon neutrality". In recent years, the installed capacity of new energy grid-connected across the country has continued to increase. Some new energy-rich areas have high rates of abandonment of wind and light, resulting in a large amount of energy waste. How to efficiently and economically consume large-scale renewable energy is a new type of future energy. Key technical cha...

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Problems solved by technology

However, in order to reduce investment costs, the lithium battery capacity configuration in the system is limited

In addition, due to the difficulty in matching the dynamic response of the hydrogen production unit and the renewable energy, it will be difficult for the lithium battery energy storage unit with a small capacity to stabilize the DC voltage, and even cause the system to collapse. Therefore, how to use the electric energy storage unit with a small capacity to balance the dynamic characteristics Due to the power difference caused by the mismatch, there are still some technical problems in ensuring the stable operation of the renewable energy hydrogen production island system

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