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state.js
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state.js
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const fastnoise = require('fastnoisejs');
var mongoose = require('mongoose');
mongoose.set('useNewUrlParser', true);
mongoose.set('useUnifiedTopology', true);
mongoose.connect('mongodb://localhost:27017/prosumer');
const user = require('./models/user');
const server = require('./express_example');
const noise = fastnoise.Create(1337);
noise.SetNoiseType(fastnoise.Simplex);
// state
/**
* powerplant
* status: stopped|running|starting
* ratio: % sent to the buffer
*/
var powerplant = {status: "stopped", buffer: 0, production: 0, maxBuffer: 1000, ratio: .5, target: 0};
// electricity price set by a a manager
var price = 1;
var prosumers = new Map();
var demand = null;
const k = 0.2;
var outages = [];
const exposed = {
powerplant,
getWindSpeed(long, lat, date){
//date is js Date
// 1 day = 24h = 1440m = 86400s = 86400000ms
//scale changes size of windy areas, higher scale makes winds more localized
var scale = 400;
//var timeScale = 1/8640000;
var timeScale = 1/10000;
var offset = date.getTime() % 100000 * timeScale;
//assume earth is sphere
//https://stackoverflow.com/questions/1185408/converting-from-longitude-latitude-to-cartesian-coordinates
var x = Math.cos(long/180*Math.PI) * Math.cos(lat/180*Math.PI);
var y = Math.sin(long/180*Math.PI) * Math.cos(lat/180*Math.PI);
var z = Math.sin(lat/180*Math.PI);
var val = noise.GetNoise(x*scale + offset, y*scale + offset, z*scale + offset); //returns windspeed on range [-1, 1]
//map to realistic number
val = (val + 1); // [0, 2]
val = val * 5.26; // [0, 10.52] m/s
return val;
},
getTotalConsumption(nrOfConsumers = 1000) {
var temp = 0;
for (i = 0; i < nrOfConsumers; i += 1) {
temp += this.getConsumption();
}
return temp;
},
getConsumption(){
return (Math.cos(Date.now() * 0.00005 + randomG(3) * 0.1) + 1);
},
getProsumerWindSpeed(id) {
return prosumers.get(id).windSpeed;
},
getProsumerConsumption(id) {
return prosumers.get(id).consumption;
},
setProsumerRatios(id, ratios) {
var p = prosumers.get(id);
if(ratios.over != null) {
p.overRatio = ratios.over;
}
if(ratios.under != null) {
p.underRatio = ratios.under;
}
},
getProsumerRatios(id) {
var p = prosumers.get(id);
return {over: p.overRatio, under: p.underRatio};
},
getProsumerBuffer(id) {
return prosumers.get(id).buffer;
},
blockProsumer(id, t) {
let prosumer = prosumers.get(id);
if (prosumer){
prosumer.blocked = true;
setTimeout(function () {
prosumer.blocked = false;
}, t * 1000);
}
},
getDemand() {
return demand;
},
getPrice() {
return price;
},
setPrice(newPrice){
price = newPrice;
},
getPlantRatio() {
return powerplant.ratio;
},
setPlantRatio(ratio){
powerplant.ratio = ratio;
},
getProsumers() {
return Array.from(prosumers.values());
},
getOutages() {
return outages;
},
updateProsumer(data) {
let p = prosumers.get(data.id);
p.latitude = data.lat;
p.longitude = data.long;
p.username = data.name;
prosumers.set(data.id, p);
},
setOnline(id, online){
let p = prosumers.get(id);
if (p){
p.online = online;
}
},
getProsumerById(id) {
return prosumers.get(id);
},
deleteProsumerById(id) {
prosumers.delete(id);
},
registerProsumer(p) {
initProsumer(p);
}
}
function map(x, a, b, c, d){
return (x-a)/(b-a)*(d-c)+c;
}
function getWindTable(minlat, maxlat, minlong, maxlong, vertcells){
var str = '<table style = "border-collapse:collapse;">';
var inc = (maxlat - minlat) / vertcells;
for (var y = minlat; y < maxlat; y += inc) {
str += '<tr style ="padding:0px;margin:0px;">';
for (var x = minlong; x < maxlong; x+=inc){
var val = exposed.getWindSpeed(x, y, new Date());
val = map(val, 0, 10.52, 0, 255);
str += '<td style="width:6px;height:6px;padding:0px;margin:0px;background:rgb('+val+','+val+','+val+');"></td>';
}
str += '</tr>';
}
str += '</table>';
return str;
}
function randomG(v) {
var r = 0;
for(var i = v; i > 0; i --){
r += Math.random();
}
return r / v;
}
async function initState() {
var tempProsumers = await user.find().select({username: 1, latitude: 1, longitude: 1, overRatio: 1, underRatio: 1, manager: 1, picture: 1});
for (var p of tempProsumers) {
if(!initProsumer(p)) {
continue;
}
}
setInterval(updateState, 1000);
}
function initProsumer(p) {
if (p.manager) {
return false;
}
if (p.latitude == null) {
p.latitude = 0.0;
}
if (p.longitude == null) {
p.longitude = 0.0;
}
if (p.overRatio == null) {
p.overRatio = 0;
}
if (p.underRatio == null) {
p.underRatio = 0;
}
if (p.buffer == null) {
p.buffer = 0;
}
p.bufferSize = 1000;
p.blocked = false;
p.online = false;
prosumers.set(p.id, p);
return true;
}
function updateState() {
var totalProduction = 0;
var totalConsumption = 0;
var possibleOutages = [];
var ppOutProduction = 0;
//POWERPLANT
// plantOut - electricity going from the plant to the net, not including the buffer
var ppBufferUsage = 0;
if (powerplant.status == "running"){
powerplant.buffer += powerplant.production * powerplant.ratio;
ppOutProduction = powerplant.production * (1-powerplant.ratio);
if (powerplant.buffer > powerplant.maxBuffer) {
// powerplant buffer is overfilled
// excess energy is voided
powerplant.buffer = powerplant.maxBuffer;
}
}
for (let p of prosumers) {
// netProduction - internal
// outProductin - external (buffer accounted for)
p = p[1];
p.windSpeed = exposed.getWindSpeed(p.latitude, p.longitude, new Date());
p.production = p.windSpeed * k;
p.consumption = exposed.getConsumption();
var netProduction = p.production - p.consumption;
if (netProduction >= 0) {
// buffer has room for all extra energy
if(netProduction * p.overRatio <= p.bufferSize - p.buffer) {
p.buffer += netProduction * p.overRatio;
p.outProduction = netProduction * (1 - p.overRatio);
} else { // not all energy can be stored in buffer
p.outProduction = netProduction - (p.bufferSize - p.buffer);
p.buffer = p.bufferSize;
}
} else { // buffer has enough energy
if(netProduction * p.underRatio >= -p.buffer) {
p.buffer += netProduction * p.underRatio;
p.outProduction = netProduction * (1 - p.underRatio);
} else { // buffer does not have enough energy
p.outProduction = netProduction + p.buffer;
p.buffer = 0;
}
}
// if net producer; add to production. else; add to consumption
if (p.outProduction >= 0) {
totalProduction += !p.blocked ? p.outProduction : 0;
} else {
totalConsumption -= p.outProduction;
}
}
// risk of outage
var diff = ppOutProduction + totalProduction - totalConsumption;
if (diff < 0) {
let ppBufferUsage = powerplant.buffer >= - diff ? - diff : powerplant.buffer;
powerplant.buffer -= ppBufferUsage;
if (diff + ppBufferUsage < 0) {
// consume from buffer instead of grid
for (let p of prosumers) {
p = p[1];
if (p.outProduction < 0) {
let bufferUsage = p.buffer >= - p.outProduction ? - p.outProduction : p.buffer;
p.buffer -= bufferUsage;
p.outProduction += bufferUsage;
totalConsumption -= bufferUsage;
possibleOutages.push(p.id);
}
}
}
}
// report outages
if (ppOutProduction + totalProduction - totalConsumption + ppBufferUsage < 0) {
outages = possibleOutages;
} else {
outages = [];
}
demand = totalProduction - totalConsumption;
}
setTimeout(initState);
module.exports = exposed;