PLEA Network

18 October 2017, The Conversation, The government’s energy policy hinges on some tricky wordplay about coal’s role. The most important thing to understand about the federal government’s new National Energy Guarantee is that it is designed not to produce a sustainable and reliable electricity supply system for the future, but to meet purely political objectives for the current term of parliament. Those political objectives are: to provide a point of policy difference with the Labor Party; to meet the demands of the government’s backbench to provide support for coal-fired electricity; and to be seen to be acting to hold power prices down. Meeting these objectives solves Prime Minister Malcolm Turnbull’s immediate political problems. But it comes at the cost of producing a policy that can only produce further confusion and delay. The government’s central problem is that, as well as being polluting, coal-fired power is not well suited to the problem of increasingly high peaks in power demand, combined with slow growth in total demand. Coal-fired power plants are expensive to start up and shut down, and are therefore best suited to meeting “baseload demand” – that is, the base level of electricity demand that never goes away. Until recently, this characteristic of coal was pushed by the government as the main reason we needed to maintain coal-fired power. The opposite of baseload power is “dispatchable” power, which can be turned on and off as needed. Classic sources of dispatchable power include hydroelectricity and gas, while recent technological advances mean that large-scale battery storageis now also a feasible option. Coal-fired plants can be adapted to be “load-following” which gives them some flexibility in their output. But this requires expensive investment and reduces the plants’ operating life. The process is particularly ill-suited to the so-called High Efficiency, Low Emissions (HELE) plants being pushed as a solution to the other half of the policy problem, reducing carbon dioxide emissions. Read More here