ElectricityMeter General Question

[Sn0w3y]

Hello,

The Production is shown as “Consumption” but in fact there is no “Consumption-Meter” there, so it should be sent to grid instead on the UI…

This is my Impl. so far, where i handle if the inverter is only a String-Inverter without a Battery:

@Designate(ocd = Config.class, factory = true)
@Component(//
        name = "String-Inverter.Sungrow", //
        immediate = true, //
        configurationPolicy = ConfigurationPolicy.REQUIRE //
)
public class SungrowStringInverterImpl extends AbstractOpenemsModbusComponent implements
        ElectricityMeter, SungrowStringInverter, ModbusComponent, OpenemsComponent {

    public SungrowStringInverterImpl() {
        super(//
                OpenemsComponent.ChannelId.values(), //
                ModbusComponent.ChannelId.values(), //
                ManagedSymmetricPvInverter.ChannelId.values(), //
                ElectricityMeter.ChannelId.values(), //
                SungrowStringInverter.ChannelId.values() //
        );
    }
    

    @Reference
    protected ConfigurationAdmin cm;
    private Sum sum;


    @Reference(policy = ReferencePolicy.STATIC, policyOption = ReferencePolicyOption.GREEDY, cardinality = ReferenceCardinality.MANDATORY)
    protected void setModbus(BridgeModbus modbus) {
        super.setModbus(modbus);
    }
    
    private MeterType meterType = MeterType.GRID;

    private boolean invertActivePower;

    
    @Activate
    void activate(ComponentContext context, Config config) throws OpenemsException {    	
        this.meterType = config.type();
        this.invertActivePower = config.invertActivePower();
        if (super.activate(context, config.id(), config.alias(), config.enabled(), config.modbusUnitId(), this.cm,
                "Modbus", config.modbus_id())) {
            return;
        }
    }
    

    @Deactivate
    protected void deactivate() {
        super.deactivate();
    }

    @Override
    protected ModbusProtocol defineModbusProtocol() throws OpenemsException {
        ElementToChannelConverter converter = this.invertActivePower ? ElementToChannelConverter.INVERT : ElementToChannelConverter.DIRECT_1_TO_1;

        return new ModbusProtocol(this, new FC4ReadInputRegistersTask(4989, Priority.HIGH,
                m(SungrowStringInverter.ChannelId.SERIAL_NUMBER, new StringWordElement(4989, 10)),
                new DummyRegisterElement(4999, 5017),
        		m(ElectricityMeter.ChannelId.VOLTAGE_L1, new UnsignedWordElement(5018), //
        				ElementToChannelConverter.SCALE_FACTOR_2), //
        		m(ElectricityMeter.ChannelId.VOLTAGE_L2, new UnsignedWordElement(5019), //
        				ElementToChannelConverter.SCALE_FACTOR_2), //
        		m(ElectricityMeter.ChannelId.VOLTAGE_L3, new UnsignedWordElement(5020), //
        				ElementToChannelConverter.SCALE_FACTOR_2), //
        		m(ElectricityMeter.ChannelId.CURRENT_L1, new UnsignedWordElement(5021), //
        				ElementToChannelConverter.SCALE_FACTOR_2), //
        		m(ElectricityMeter.ChannelId.CURRENT_L2, new UnsignedWordElement(5022), //
        				ElementToChannelConverter.SCALE_FACTOR_2), //
        		m(ElectricityMeter.ChannelId.CURRENT_L3, new UnsignedWordElement(5023), //
        				ElementToChannelConverter.SCALE_FACTOR_2), //
                new DummyRegisterElement(5024, 5029),
                m(ElectricityMeter.ChannelId.ACTIVE_POWER,
                        new UnsignedDoublewordElement(5030).wordOrder(WordOrder.LSWMSW), converter)
                
                
        ));
    }

    @Override
    public String debugLog() {
        return "L:" + this.getActivePower().asString();
    }

	@Override
	public MeterType getMeterType() {
		return this.meterType;
	}
}

How do i fix this?

[stefan.feilmeier]

For future readers: this was answered here:

Implement a new Device to Backend

Yes, Edge sends a EdgeConfig object to UI, that holds information about all Natures, Components and Channels. This is used to dynamically build the UI. This is not the way OpenEMS Edge works. OpenEMS always calculates the Consumption from measured Grid, Production and ESS. If any of those is not there, it is assumed to be zero. The code for this calculation is here: https://github.com/OpenEMS/openems/blob/develop/io.openems.edge.core/src/io/openems/edge/core/sum/SumImpl.java#L359-L360C24 In …

[Sn0w3y]

Hello Stefan,

i see i have a new “Problem” now. The meter shows no correct values from time to time it sporadically jumps up and down regarding tge values. See the attached Picture

I added tge Virtual Meter as you said as a component

What could it be?

[stefan.feilmeier]

Hi. Good question. I can’t quite explain this behaviour myself (without much more information and your detailed config and code)… sorry.