Net Zero Governance Loop: A briefing document for Councillors.

Why energy planning must start with engineering reality, not predetermined policy targets.

Introduction

Electricity systems run on physics, engineering and economics.

They must deliver power every minute of every day, at a price households and businesses can afford.

Yet much of Australia’s current energy policy starts somewhere else entirely — with political targets, particularly the goal of Net Zero emissions.

Once those targets are set, modelling is then used to design pathways to achieve them.

This creates an important structural problem.

When targets come first and modelling comes later, the process is no longer testing policy assumptions.

It is working out how to justify them.

This briefing explains how that system operates in practice, why it matters for regional communities, and how councillors can assess Net Zero related proposals that increasingly appear in local and regional policy frameworks.

Key Point

Australia’s energy transition is increasingly planned by setting emissions targets first and then modelling pathways to achieve them.

The question that often goes unexamined is whether those targets themselves are technically achievable, economically realistic or socially sustainable.

The Energy Realism Starting Point

Any serious discussion about energy policy must begin with a basic reality.

Electricity systems must operate reliably under all conditions, not just ideal modelling scenarios.

They must also do so at the lowest possible cost to the community.

This matters because there is no such thing as “government money”.

Every subsidy, grant, underwriting scheme or infrastructure program is ultimately paid for by:

• taxpayers

• electricity consumers

• or future public debt.

When electricity prices rise, the effects ripple through the entire economy.

Households pay more for power. Businesses face higher operating costs. Food, transport and manufacturing become more expensive.

Energy policy therefore affects the cost of living, economic productivity and national competitiveness.

Reality Check

Modern economies depend on electricity that is reliable, affordable and available at all times. Any energy policy that fails one of those tests eventually fails the public. Electricity systems cannot run on targets or modelling alone. They must operate within the limits of physics, engineering, land, materials and cost.

How the Policy–Modelling Loop Works

Over the past decade a new model of policy making has emerged in climate and energy governance.

1. Governments set emissions targets such as Net Zero.2. Advisory bodies or modelling institutions develop pathways designed to achieve those targets.3. Governments implement policies based on those pathways.4. When concerns arise about cost or feasibility, decision-makers point to the modelling as independent expert advice.

At first glance this looks like evidence-based policy.

But in many cases the modelling is not testing the policy. It is demonstrating how the policy might be implemented.

If modelling begins with the assumption that Net Zero must occur by a certain date, the modelling cannot answer the question:

Is this target achievable at reasonable cost?

It can only answer:

What system would need to be built to reach that target?

The Net Zero Governance Loop

Step 1 – Government sets an emissions target (for example Net Zero by 2050).

Step 2 – Modelling bodies develop pathways showing how the target could be achieved.

Step 3 – Policies and infrastructure plans are built around those modelling pathways.

Step 4 – Large-scale infrastructure programs begin (generation, storage, transmission).

Step 5 – If concerns arise about cost or feasibility, governments cite the modelling authority.

Step 6 – The target remains fixed, so the system continues expanding to meet it.

Loop repeats.

The key point is that modelling rarely re-examines the original target. Instead the focus shifts to building whatever infrastructure the modelling suggests is required. Few people question the modelling.

How the Net Zero Planning System Works in Australia

Australia’s electricity transition is set by a planning framework that links policy targets, system modelling and government funding.

Three components sit at the centre of this system:

• the Australian Energy Market Operator (AEMO)

• the Integrated System Plan (ISP)

• the Capacity Investment Scheme (CIS)

Together they form the mechanism that turns the political goal of Net Zero by 2050 into real infrastructure projects across the electricity system.

AEMO — The System Planner

The Australian Energy Market Operator (AEMO) operates the National Electricity Market and is responsible for planning the future electricity system.

Its role includes:

• forecasting electricity demand

• modelling future supply and reliability risks

• identifying the generation and network infrastructure required to maintain system stability.

Because AEMO produces the most detailed modelling of the electricity system, its analysis carries enormous influence over energy planning in Australia.

When AEMO identifies infrastructure needs, governments, regulators and investors tend to treat those findings as the technical basis for future development.

The Integrated System Plan (ISP)

Every two years AEMO publishes the Integrated System Plan.

The ISP is effectively a long-term blueprint for how Australia’s electricity system could evolve over the coming decades.

It models different scenarios and identifies the infrastructure required to support them, including:

• new transmission corridors

• renewable energy zones

• large-scale battery storage

• the retirement of ageing coal plants.

However, one important detail is often overlooked.

The modelling scenarios are built around policy settings governments have already adopted, including Australia’s commitment to Net Zero emissions by 2050.

In other words, the modelling begins with the assumption that the electricity system will decarbonise.

The modelling therefore answers the question:

“What infrastructure would we need if Net Zero is pursued?”

It does not ask:

“Should Net Zero be pursued in the first place?”

Once that assumption is embedded in the modelling, the planning process naturally shifts toward building the system required to deliver it.

The Capacity Investment Scheme (CIS)

The Capacity Investment Scheme is the financial mechanism designed to accelerate that build-out.

Under the scheme, the federal government offers underwriting contracts to developers building projects such as:

• wind farms

• solar farms

• large-scale batteries.

These contracts guarantee a minimum level of revenue for the project.

If electricity market prices fall below the agreed level, the government uses taxpayer money to make up the difference.

In practical terms, taxpayers are underwriting part of the commercial risk for these projects. If electricity market revenues fall below the guaranteed level, public funds are used to fill the gap.

Many of the companies developing large-scale renewable energy projects in Australia are huge global energy corporates or investment funds. The scheme therefore transfers part of the investment risk from private developers to Australian taxpayers.

Why should struggling Aussies be propping up the bottom lines of massive international companies?

How the Pieces Fit Together

The process operates in a clear sequence.

1. governments adopt emissions reduction targets such as Net Zero by 2050.

2. AEMO produces modelling through the Integrated System Plan, showing what the electricity system would need to look like to meet those targets.

3. the modelling identifies the infrastructure required — transmission lines, renewable energy zones, wind farms, solar farms and large batteries.

Finally, government programs such as the Capacity Investment Scheme reduce investor risk so those projects proceed.

Over time this creates a reinforcing loop.

Policy targets shape the modelling.

The modelling defines the infrastructure.

Government programs then help ensure that infrastructure is delivered.

The result is that the policy conversation gradually shifts away from questioning the targets themselves and toward building the system required to achieve them.

Why This Matters for Local Government

Most of the infrastructure identified through these planning processes is located outside major cities because wind farms, solar farms, batteries and transmission lines require large areas of land.

Regional Local councils encounter these projects through:

• development applications

• transmission corridor proposals

• renewable energy developments and

• regional climate alliances such as the Resilient Hills & Coast Partnership - AHC and MBDC (linked to the SA government funded Climate Ready Coasts and the Climate Ready Communities Program)

Understanding how the national planning framework operates helps councillors ask a simple but important question:

Are these projects being assessed primarily on their local merits, or are they being driven by national modelling assumptions about a potential future electricity system based on Net Zero targets?

That distinction is central to responsible local governance.

Five Questions Every Councillor Should Ask About Net Zero Policies

1. Was the modelling designed to test the target, or achieve the target?

2. What real-world constraints were included? Land requirements, transmission routes, materials, construction timelines and community acceptance.

3. What cost assumptions were used? What electricity prices and technology costs are assumed?

4. What happens if key assumptions fail? For example prolonged low wind periods or delays in transmission.

5. What alternative pathways were examined? Extending existing generation, different mixes or timelines.

Conclusion

Electricity policy reaches far beyond the power sector.

It shapes household bills, business costs and the competitiveness of the wider economy.

Energy planning must remain grounded in engineering reality, economic cost and transparent decision making.

Understanding how policy targets and modelling interact helps ensure that major infrastructure decisions are properly scrutinised.

Final Reflection

When electricity policy begins with fixed targets, planning shifts from asking what works to asking what must be built to meet the target.

Electricity systems do not ultimately answer to policy targets or modelling assumptions.

They answer to physics, engineering and economics and to the households and businesses that must live with the consequences.

Net Zero Governance Loop | Prepared for discussion purposes

Net Zero 2027 energy policy thumbnail featuring electricity infrastructure, modelling process and question of who controls energy planning in Australia.