Enhancing State Energy Security Planning and Emergency Preparedness Act of 2017 (Sec. 2) This bill amends the Energy Policy and Conservation Act to provide financial assistance to states for the implementation, review, and revision of a state energy security plan that assesses the state's existing circumstances and proposes methods to strengthen the ability of the state to have a reliable, secure, and resilient energy infrastructure. A state energy security plan must: address all fuels, including petroleum products, other liquid fuels, coal, electricity, and natural gas, as well as regulated and unregulated energy providers; provide a state energy profile, including an assessment of energy production, distribution, and end-use; address potential hazards to each energy sector or system, including physical threats and cybersecurity threats and vulnerabilities; provide a risk assessment of energy infrastructure and cross-sector interdependencies; provide a risk mitigation approach to enhance reliability and end-use resilience; and address multi-state, Indian tribe, and regional coordination planning and response and encourage mutual assistance in cyber and physical response plans. In developing an energy security plan, a state must coordinate with entities responsible for maintaining fuel or electric reliability, including public utilities and private energy providers. Upon request of a state, the Department of Energy (DOE) may provide assistance in the development, implementation, or revision of a state energy security plan. DOE's authority to carry out this bill's provisions expires on October 31, 2022.