add reference Riemann integral in "Understanding Home Energy Management" (#19251)

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erffrfez 2021-10-23 05:39:20 +08:00 committed by GitHub
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@ -17,4 +17,6 @@ Home Assistant is an open platform and so home energy management is not restrict
- [Integrate your gas consumption](/docs/energy/gas/)
- [Integrate individual devices](/docs/energy/individual-devices/)
If you have a sensor that returns instantaneous power readings (W or kW), then to add a sensor that returns energy usage or generation (kWh) refer to [Riemann sum integral integration](/docs/integrations/integration/#energy)
<img src='/images/docs/energy/energy-overview.png' alt='Visual representation of how all different energy forms relate.' style='border: 0;box-shadow: none;'>