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+# Smart Grid Ethan Version
+
+## Definition
+
+- Definition of electrical grid:
+    - Power station does **generation and storage**
+    - Transformers, lines are the **transmission** and **distribution**
+    - Electricity retailer sell electricity to **consumers**
+
+## Present state
+
+- same as above
+    - Generation
+    - Transmission
+    - Distribution
+        - TO customer
+        - Industrial, commercial, residential
+
+## Perspective
+
+- Combine present grid grid with new technology: present + future
+- Futuristic grid: reasons
+    - New technologies
+    - Customer likes improvements
+    - More data
+    - AI
+    - Climate change
+
+## Challenges
+
+- Pattern of electricity usage varies
+- Renewable energy are not continuous (intermittent)
+- Seasonality: Summer and winter differences
+- Power plants has different responding times and prices
+- Electric trading is complex (P2P electricity)
+- Usage of Electric stuff: EV, IoT
+- Climate change
+- Network transmission need the capacity
+
+## Electricity market
+
+- A market mechanism to buy additional energy when demand is high, and sell when
+  demand is low.
+- High demand and low supply causes price increase
+- Low demand and high supply cause price decrease
+- Introduce a exchange market, that electricity resellers and major consumers
+  can buy from both exchange and from power plants
+
+## Data flow
+
+### Intro (WTF)
+
+- ![stuff ahh](./assets/3-ethan-smart-grid-data-flow.webp)
+
+### Integrating data with ML
+
+- For demand forecasting: for the demand in the long term
+    - Use population data, energy price, share of renewable energy and GDP to
+      predict future energy consumption
+- Demand time series forecasting: for the demand in a time interval
+    - ![example 1](./assets/3-ethan-smart-grid-forecasting-1.webp)
+    - ![example 2](./assets/3-ethan-smart-grid-forecasting-2.webp)
+
+## Summary
+
+- The problems:
+    - Cost (Equity)
+    - Sustainability (Green)
+    - Security
+
+## Examples
+
+### Shell energy
+
+- Battery and energy trading
+    - ![shit](./assets/3-ethan-smart-grid-shell.webp)
+
+### TESLA
+
+- Megapack project: stores energy for the grid reliably and safely.
+- Each unit store a lot of energy, and withstands extreme weathers
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