mirror of
https://github.com/Akkudoktor-EOS/EOS.git
synced 2026-10-08 23:46:38 +00:00
Andreas
f976335122
Add PVForecastAkkudoktorLocal, which runs the modelling chain inside EOS on raw Open-Meteo irradiance instead of calling a forecast service: solar position, horizon shading, plane transposition, incidence-angle modifier, cell temperature, PVWatts DC and inverter AC. It needs no API key and serves up to 16 days at 15-minute resolution from a single hourly request, which is what keeps `optimization.tail_horizon_hours` fed - services wrapping Open-Meteo cut the horizon much shorter. Several Open-Meteo models can be listed in `weather_models` and are averaged per variable at no extra request cost. With `calibration_enabled` the provider fits itself against `measurement.pv_production_emr_keys` over the past `calibration_days`: a global scale factor plus optional per-solar-azimuth factors, each weighted by modelled energy, shrunk toward the global factor by `calibration_prior_kwh` and clamped to `[calibration_min_factor, calibration_max_factor]`. The comparison runs on past intervals, where Open-Meteo serves analysed rather than forecast weather, so it corrects the error of the PV model and not that of the weather forecast. Calibration is a scale factor on the output and never touches `userhorizon`, `surface_tilt`, `surface_azimuth` or `peakpower`. The docs say so, and say why a short window and a plant fault inside it are the two ways to end up with a misleading factor. Also add `Measurement.pv_production_total_kwh()` alongside the existing load total, and `scripts/pvforecast_backtest.py`, which scores configuration variants against the stored meter readings without waiting for new forecasts to come true.
69 lines
2.7 KiB
JavaScript
69 lines
2.7 KiB
JavaScript
// Node-RED function: cumulative PV production meter readings -> EOS measurement API.
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//
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// Strang:
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// inject (repeat 3600 s, msg.topic = die SQL aus dem Tutorial)
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// -> mysql "MariaDB" (DB `sensor`)
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// -> DIESE function
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// -> http request (Method: "- set by msg.method -")
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//
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// EOS speichert unter `pv_production_emr_keys` Zaehlerstaende (EMR) in kWh und
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// bildet die Differenzen selbst. Aus den Momentanleistungen in `data.solarallpower`
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// muss also erst ein monoton steigender Zaehler werden - das macht die SQL.
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//
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// Wichtig: das Startdatum in der SQL bleibt FEST. Ein rollendes
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// `NOW() - INTERVAL n DAY` verschiebt den Nullpunkt der kumulativen Summe bei
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// jedem Lauf, und EOS liest den Sprung als Produktion.
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const BASE_URL = "http://192.168.1.151:8503";
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const KEY = "pv_produktion_emr";
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const TZ = "Europe/Berlin";
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function toIsoWithOffset(value) {
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// DATE_FORMAT() kommt als String in lokaler Zeit zurueck. Den Offset aus dem
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// Datum selbst bilden, damit CEST und CET beide stimmen.
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const date = value instanceof Date ? value : new Date(String(value).replace(" ", "T"));
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const pad = n => String(Math.trunc(Math.abs(n))).padStart(2, "0");
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const offsetMin = -date.getTimezoneOffset();
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const sign = offsetMin >= 0 ? "+" : "-";
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return `${date.getFullYear()}-${pad(date.getMonth() + 1)}-${pad(date.getDate())}` +
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`T${pad(date.getHours())}:${pad(date.getMinutes())}:${pad(date.getSeconds())}` +
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`${sign}${pad(offsetMin / 60)}:${pad(offsetMin % 60)}`;
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}
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const rows = Array.isArray(msg.payload) ? msg.payload : [];
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const data = {};
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let last = null;
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let skipped = 0;
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for (const row of rows) {
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const value = Number(row.emr);
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if (!Number.isFinite(value)) {
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skipped += 1;
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continue;
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}
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// Ein Zaehler laeuft nur vorwaerts. Ein Rueckschritt bedeutet eine Luecke oder
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// einen kaputten Messwert - EOS wuerde daraus eine negative Produktionsstunde
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// machen.
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if (last !== null && value < last) {
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skipped += 1;
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continue;
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}
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last = value;
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data[toIsoWithOffset(row.ts)] = Number(value.toFixed(6));
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}
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const count = Object.keys(data).length;
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if (count === 0) {
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node.warn("Keine PV-Messwerte gefunden - topic und Zeitfenster in der SQL pruefen.");
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return null;
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}
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if (skipped > 0) {
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node.warn(`${skipped} Zeilen uebersprungen (nicht-numerisch oder Zaehler rueckwaerts).`);
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}
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node.status({ text: `${count} EMR-Werte, letzter ${last.toFixed(1)} kWh` });
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msg.method = "PUT";
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msg.url = `${BASE_URL}/v1/measurement/series?key=${encodeURIComponent(KEY)}`;
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msg.headers = { "Content-Type": "application/json" };
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msg.payload = { data: data, dtype: "float64", tz: TZ };
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return msg;
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