powerflow/vfd.h

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#ifndef VFD_H
#define VFD_H

#include "powerflow.h"
#include "link.h"
#include "node.h"

EXPORT STATUS current_injection_update_VFD(OBJECT *obj);
EXPORT SIMULATIONMODE interupdate_vfd(OBJECT *obj, unsigned int64 delta_time, unsigned long dt, unsigned int iteration_count_val, bool interupdate_pos);
EXPORT STATUS postupdate_vfd(OBJECT *obj);

class vfd : public link_object
{
public:
    static CLASS *oclass;
    static CLASS *pclass;

public:
    int create(void);
    int init(OBJECT *parent);
    TIMESTAMP presync(TIMESTAMP t0);
    TIMESTAMP sync(TIMESTAMP t0);
    TIMESTAMP postsync(TIMESTAMP t0);   //Legacy FBS coding in here - may not be needed in future
    vfd(MODULE *mod);
    inline vfd(CLASS *cl=oclass):link_object(cl){};
    int isa(char *classname);

    STATUS alloc_freq_arrays(double delta_t_val);
    void CheckParameters(void);
    complex complex_exp(double angle);
    STATUS VFD_current_injection(void);
    
    SIMULATIONMODE inter_deltaupdate_vfd(unsigned int64 delta_time, unsigned long dt, unsigned int iteration_count_val, bool interupdate_pos);
    STATUS post_deltaupdate_vfd(void);

public:
    double ratedRPM;
    double motorPoles;
    double desiredRPM;
    double stableTime;
    double voltageLLRating;
    double horsePowerRatedVFD;
    double nominal_output_frequency;
    double settleTime;

    enum {
        VFD_OFF=0,          
        VFD_CHANGING=1,     
        VFD_STEADY=2    
    };
    enumeration vfdState;
    enumeration prev_vfdState;

    double currEfficiency;
    double desiredFrequency;
    double currentFrequency;

private:
    node *fNode;
    node *tNode;

    double *settleFreq;
    unsigned int settleFreq_length;
    unsigned int curr_array_position;
    bool force_array_realloc;

    double nominal_output_radian_freq;
    double VbyF;
    double HPbyF;

    double phasorVal[3];
    complex prev_power[3];
    double prev_desiredRPM;
    double efficiency_coeffs[8];
    double curr_time_value;
    double prev_time_value;
};

#endif // VFD_H

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GridLAB-D™ Version 4.1

An open-source smart grid simulator created by PNNL for the US Department of Energy Office of Electricity