87 lines
4.0 KiB
C++
87 lines
4.0 KiB
C++
void backflowControl() { //PV BACKFLOW CONTROL (INPUT MOSFET)
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if (output_Mode == 0) {
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bypassEnable = 1; //PSU MODE: Force backflow MOSFET on
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}
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else { //CHARGER MODE: Force backflow MOSFET on
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if (voltageInput > voltageOutput + voltageDropout) {
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bypassEnable = 1; //CHARGER MODE: Normal Condition - Turn on Backflow MOSFET (on by default when not in MPPT charger mode)
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}
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else {
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bypassEnable = 0; //CHARGER MODE: Input Undervoltage - Turn off bypass MOSFET and prevent PV Backflow (SS)
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}
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}
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digitalWrite(backflow_MOSFET, bypassEnable); //Signal backflow MOSFET GPIO pin
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}
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void Device_Protection() {
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//ERROR COUNTER RESET
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currentRoutineMillis = millis();
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if (currentErrorMillis - prevErrorMillis >= errorTimeLimit) { //Run routine every millisErrorInterval (ms)
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prevErrorMillis = currentErrorMillis; //Store previous time
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if (errorCount < errorCountLimit) {
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errorCount = 0; //Reset error count if it is below the limit before x milliseconds
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}
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else {} // TO ADD: sleep and charging pause if too many errors persists
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}
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//FAULT DETECTION
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ERR = 0; //Reset local error counter
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backflowControl(); //Run backflow current protection protocol
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if (temperature > temperatureMax) {
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OTE = 1; //OTE - OVERTEMPERATURE: System overheat detected
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ERR++;
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errorCount++;
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} else {
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OTE = 0;
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}
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if (currentInput > currentInAbsolute) {
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IOC = 1; //IOC - INPUT OVERCURRENT: Input current has reached absolute limit
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ERR++;
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errorCount++;
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} else {
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IOC = 0;
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}
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if (currentOutput > currentOutAbsolute) {
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OOC = 1; //OOC - OUTPUT OVERCURRENT: Output current has reached absolute limit
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ERR++;
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errorCount++;
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} else {
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OOC = 0;
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}
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if (voltageOutput > voltageBatteryMax + voltageBatteryThresh) {
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OOV = 1; //OOV - OUTPUT OVERVOLTAGE: Output voltage has reached absolute limit
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ERR++;
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errorCount++;
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} else {
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OOV = 0;
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}
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if (voltageInput < vInSystemMin && voltageOutput < vInSystemMin) {
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FLV = 1; //FLV - Fatally low system voltage (unable to resume operation)
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ERR++;
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errorCount++;
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} else {
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FLV = 0;
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}
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if (output_Mode == 0) { //PSU MODE specific protection protocol
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REC = 0; BNC = 0; //Clear recovery and battery not connected boolean identifiers
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if (voltageInput < voltageBatteryMax + voltageDropout) {
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IUV = 1; //IUV - INPUT UNDERVOLTAGE: Input voltage is below battery voltage (for psu mode only)
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ERR++;
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errorCount++;
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} else {
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IUV = 0;
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}
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}
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else { //Charger MODE specific protection protocol
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backflowControl(); //Enable backflow current detection & control
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if(voltageOutput<vInSystemMin) {BNC=1;ERR++;} else{BNC=0;} //BNC - BATTERY NOT CONNECTED (for charger mode only, does not treat BNC as error when not under MPPT mode)
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if (voltageInput < voltageBatteryMax + voltageDropout) {
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IUV = 1; //IUV - INPUT UNDERVOLTAGE: Input voltage is below max battery charging voltage (for charger mode only)
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ERR++;
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REC = 1;
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} else {
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IUV = 0;
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}
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}
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}
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