def __init__(self, system, config):
super(IEEESTModel, self).__init__(system, config)
self.KST5 = ConstService(v_str='KS * T5', tex_name='KS*T5')
self.SW = Switcher(
u=self.MODE,
options=[1, 2, 3, 4, 5, 6],
)
self.signal = Algeb(
tex_name='S_{in}',
info='Input signal',
)
# input signals:
# 1 (s0) - Rotor speed deviation (p.u.)
# 2 (s1) - Bus frequency deviation (p.u.) # TODO: calculate freq without reimpl.
# 3 (s2) - Generator electrical power in Gen MVABase (p.u.) # TODO: allow using system.config.mva
# 4 (s3) - Generator accelerating power (p.u.)
# 5 (s4) - Bus voltage (p.u.)
# 6 (s5) - Derivative of p.u. bus voltage # TODO: memory block for calc. of derivative
self.signal.e_str = 'SW_s0 * (1-omega) + SW_s1 * 0 + SW_s2 * te + ' \
'SW_s3 * (tm-tm0) + SW_s4 *v + SW_s5 * 0 - signal'
self.F1 = Lag2ndOrd(u=self.signal, K=1, T1=self.A1, T2=self.A2)
self.F2 = LeadLag2ndOrd(u=self.F1_y,
T1=self.A3,
T2=self.A4,
T3=self.A5,
T4=self.A6)
self.LL1 = LeadLag(u=self.F2_y, T1=self.T1, T2=self.T2)
self.LL2 = LeadLag(u=self.LL1_y, T1=self.T3, T2=self.T4)
self.WO = Washout(u=self.LL2_y, T=self.T6, K=self.KST5) # WO_y == Vss
self.VLIM = Limiter(u=self.WO_y,
lower=self.LSMIN,
upper=self.LSMAX,
info='Vss limiter')
self.Vss = Algeb(
tex_name='V_{ss}',
info='Voltage output before output limiter',
e_str='VLIM_zi * WO_y + VLIM_zu * LSMAX + VLIM_zl * LSMIN - Vss')
self.OLIM = Limiter(u=self.v,
lower=self.VCL,
upper=self.VCU,
info='output limiter')
# TODO: allow ignoring VCU or VCL when zero
self.vsout.e_str = 'OLIM_zi * Vss - vsout'
def __init__(self):
# Indicatior of frequency deviation
self.Lfl1 = Limiter(u=self.fHz,
lower=self.fl3, upper=self.fl1,
info='Frequency comparer for (fl3, fl1)',
equal=False, no_warn=True,
)
self.Lfl2 = Limiter(u=self.fHz,
lower=self.fl3, upper=self.fl2,
info='Frequency comparer for (fl3, fl2)',
equal=False, no_warn=True,
)
self.Lfu1 = Limiter(u=self.fHz,
lower=self.fu1, upper=self.fu3,
info='Frequency comparer for (fu1, fu3)',
equal=False, no_warn=True,
)
self.Lfu2 = Limiter(u=self.fHz,
lower=self.fu2, upper=self.fu3,
info='Frequency comparer for (fu2, fu3)',
equal=False, no_warn=True,
)
# Frequency deviation time continuity check
self.IAWfl1 = IntegratorAntiWindup(u='Lfl1_zi * (1 - res) - Tfl1 / Tres * res',
T=1, K=1, y0='0',
lower=self.zero, upper=self.Tfl1,
info='condition check for (fl3, fl1)',
no_warn=True,
)
self.IAWfl2 = IntegratorAntiWindup(u='Lfl2_zi * (1 - res) - Tfl2 / Tres * res',
T=1, K=1, y0='0',
lower=self.zero, upper=self.Tfl2,
info='condition check for (fl3, fl2)',
no_warn=True,
)
self.IAWfu1 = IntegratorAntiWindup(u='Lfu1_zi * (1 - res) - Tfu1 / Tres * res',
T=1, K=1, y0='0',
lower=self.zero, upper=self.Tfu1,
info='condition check for (fu1, fu3)',
no_warn=True,
)
self.IAWfu2 = IntegratorAntiWindup(u='Lfl2_zi * (1 - res) - Tfu2 / Tres * res',
T=1, K=1, y0='0',
lower=self.zero, upper=self.Tfu2,
info='condition check for (fu2, fu3)',
no_warn=True,
)
def test_sorted_limiter(self):
"""
Tests for `SortedLimiter` class
Returns
-------
"""
self.cmp = Limiter(self.u, self.lower, self.upper)
self.cmp.list2array(len(self.u.v))
self.cmp.check_var()
self.rcmp = SortedLimiter(self.u, self.lower, self.upper, n_select=1)
self.rcmp.list2array(len(self.u.v))
self.rcmp.check_var()
self.assertSequenceEqual(self.rcmp.zl.tolist(),
[0., 0., 1., 0., 0., 0., 0., 0.])
self.assertSequenceEqual(self.rcmp.zi.tolist(),
[1., 1., 0., 1., 1., 1., 1., 0.])
self.assertSequenceEqual(self.rcmp.zu.tolist(),
[0., 0., 0., 0., 0., 0., 0., 1.])
# test when no `n_select` is specified
self.rcmp_noselect = SortedLimiter(self.u, self.lower, self.upper)
self.rcmp_noselect.list2array(len(self.u.v))
self.rcmp_noselect.check_var()
self.assertSequenceEqual(self.rcmp_noselect.zl.tolist(),
self.cmp.zl.tolist())
self.assertSequenceEqual(self.rcmp_noselect.zi.tolist(),
self.cmp.zi.tolist())
self.assertSequenceEqual(self.rcmp_noselect.zu.tolist(),
self.cmp.zu.tolist())
# test when no `n_select` is over range
self.rcmp_noselect = SortedLimiter(self.u,
self.lower,
self.upper,
n_select=999)
self.rcmp_noselect.list2array(len(self.u.v))
self.rcmp_noselect.check_var()
self.assertSequenceEqual(self.rcmp_noselect.zl.tolist(),
self.cmp.zl.tolist())
self.assertSequenceEqual(self.rcmp_noselect.zi.tolist(),
self.cmp.zi.tolist())
self.assertSequenceEqual(self.rcmp_noselect.zu.tolist(),
self.cmp.zu.tolist())
def test_limiter(self):
"""
Tests for `Limiter` class
Returns
-------
"""
self.cmp = Limiter(self.u, self.lower, self.upper)
self.cmp.list2array(len(self.u.v))
self.cmp.check_var()
self.assertSequenceEqual(self.cmp.zl.tolist(),
[1., 1., 1., 1., 0., 0., 0., 0.])
self.assertSequenceEqual(self.cmp.zi.tolist(),
[0., 0., 0., 0., 1., 0., 0., 0.])
self.assertSequenceEqual(self.cmp.zu.tolist(),
[0., 0., 0., 0., 0., 1., 1., 1.])
def __init__(self, system, config):
EV1Model.__init__(self, system, config)
# Modify power limit PHL
self.PHLup = Algeb(
info='PHL upper limit',
v_str='pcap * pmx',
e_str='pcap * pmx - PHLup',
tex_name=r'PHL_{upper}',
)
self.PHL2 = Limiter(
u=self.Psum,
lower=self.pmn,
upper=self.PHLup,
enable=1,
info='limiter for Psum in [pmn, pcap * pmx]',
)
# Modify
self.Ipul.v_str = '(Psum * PHL2_zi + PHLup * PHL2_zu + pmn * PHL2_zl) / vp'
self.Ipul.e_str = '(Psum * PHL2_zi + PHLup * PHL2_zu + pmn * PHL2_zl) / vp - Ipul'
def __init__(self, system, config):
Model.__init__(self, system, config)
self.flags.tds = True
self.group = 'DG'
self.config.add(OrderedDict((('plim', 0),
)))
self.config.add_extra('_help',
plim='enable input power limit check bound by [0, pmx]',
)
self.config.add_extra('_tex',
plim='P_{lim}',
)
self.config.add_extra('_alt',
plim=(0, 1),
)
self.SWPQ = Switcher(u=self.pqflag, options=(0, 1), tex_name='SW_{PQ}', cache=True)
self.buss = DataSelect(self.igreg, self.bus,
info='selected bus (bus or igreg)',
)
self.busfreq = DeviceFinder(self.busf, link=self.buss, idx_name='bus')
# --- initial values from power flow ---
# a : bus voltage angle
# v : bus voltage magnitude
# p0s : active power from connected static PV generator
# q0s : reactive power from connected static PV generator
# pref0 : initial active power set point for the PVD1 device
# qref0 : initial reactive power set point for the PVD1 device
self.a = ExtAlgeb(model='Bus', src='a', indexer=self.buss, tex_name=r'\theta',
info='bus (or igreg) phase angle',
unit='rad.',
e_str='-Ipout_y * v * u',
ename='P',
tex_ename='P',
)
self.v = ExtAlgeb(model='Bus', src='v', indexer=self.buss, tex_name='V',
info='bus (or igreg) terminal voltage',
unit='p.u.',
e_str='-Iqout_y * v * u',
ename='Q',
tex_ename='Q',
)
self.p0s = ExtService(model='StaticGen',
src='p',
indexer=self.gen,
tex_name='P_{0s}',
info='Initial P from static gen',
)
self.q0s = ExtService(model='StaticGen',
src='q',
indexer=self.gen,
tex_name='Q_{0s}',
info='Initial Q from static gen',
)
# --- calculate the initial P and Q for this distributed device ---
self.pref0 = ConstService(v_str='gammap * p0s', tex_name='P_{ref0}',
info='Initial P for the PVD1 device',
)
self.qref0 = ConstService(v_str='gammaq * q0s', tex_name='Q_{ref0}',
info='Initial Q for the PVD1 device',
)
# frequency measurement variable `f`
self.f = ExtAlgeb(model='FreqMeasurement', src='f', indexer=self.busfreq, export=False,
info='Bus frequency', unit='p.u.',
)
self.fHz = Algeb(info='frequency in Hz',
v_str='fn * f', e_str='fn * f - fHz',
unit='Hz',
tex_name='f_{Hz}',
)
# --- frequency branch ---
self.FL1 = Limiter(u=self.fHz, lower=self.ft0, upper=self.ft1,
info='Under frequency comparer', no_warn=True,
)
self.FL2 = Limiter(u=self.fHz, lower=self.ft2, upper=self.ft3,
info='Over frequency comparer', no_warn=True,
)
self.Kft01 = ConstService(v_str='1/(ft1 - ft0)', tex_name='K_{ft01}')
self.Ffl = Algeb(info='Coeff. for under frequency',
v_str='FL1_zi * Kft01 * (fHz - ft0) + FL1_zu',
e_str='FL1_zi * Kft01 * (fHz - ft0) + FL1_zu - Ffl',
tex_name='F_{fl}',
discrete=self.FL1,
)
self.Kft23 = ConstService(v_str='1/(ft3 - ft2)', tex_name='K_{ft23}')
self.Ffh = Algeb(info='Coeff. for over frequency',
v_str='FL2_zl + FL2_zi * (1 + Kft23 * (ft2 - fHz))',
e_str='FL2_zl + FL2_zi * (1 + Kft23 * (ft2 - fHz)) - Ffh',
tex_name='F_{fh}',
discrete=self.FL2,
)
self.Fdev = Algeb(info='Frequency deviation',
v_str='fn - fHz', e_str='fn - fHz - Fdev',
unit='Hz', tex_name='f_{dev}',
)
self.DB = DeadBand1(u=self.Fdev, center=0.0, lower=self.fdbd, upper=0.0, gain=self.ddn,
info='frequency deviation deadband with gain',
) # outputs `Pdrp`
self.DB.db.no_warn = True
# --- Voltage flags ---
self.VL1 = Limiter(u=self.v, lower=self.vt0, upper=self.vt1,
info='Under voltage comparer', no_warn=True,
)
self.VL2 = Limiter(u=self.v, lower=self.vt2, upper=self.vt3,
info='Over voltage comparer', no_warn=True,
)
self.Kvt01 = ConstService(v_str='1/(vt1 - vt0)', tex_name='K_{vt01}')
self.Fvl = Algeb(info='Coeff. for under voltage',
v_str='VL1_zi * Kvt01 * (v - vt0) + VL1_zu',
e_str='VL1_zi * Kvt01 * (v - vt0) + VL1_zu - Fvl',
tex_name='F_{vl}',
discrete=self.VL1,
)
self.Kvt23 = ConstService(v_str='1/(vt3 - vt2)', tex_name='K_{vt23}')
self.Fvh = Algeb(info='Coeff. for over voltage',
v_str='VL2_zl + VL2_zi * (1 + Kvt23 * (vt2 - v))',
e_str='VL2_zl + VL2_zi * (1 + Kvt23 * (vt2 - v)) - Fvh',
tex_name='F_{vh}',
discrete=self.VL2,
)
# --- sensed voltage with lower limit of 0.01 ---
self.VLo = Limiter(u=self.v, lower=0.01, upper=999, no_upper=True,
info='Voltage lower limit (0.01) flag',
)
self.vp = Algeb(tex_name='V_p',
info='Sensed positive voltage',
v_str='v * VLo_zi + 0.01 * VLo_zl',
e_str='v * VLo_zi + 0.01 * VLo_zl - vp',
)
self.Pext0 = ConstService(info='External additional signal added to Pext',
tex_name='P_{ext0}',
v_str='0',
)
self.Pext = Algeb(tex_name='P_{ext}',
info='External power signal (for AGC)',
v_str='u * Pext0',
e_str='u * Pext0 - Pext'
)
self.Pref = Algeb(tex_name='P_{ref}',
info='Reference power signal (for scheduling setpoint)',
v_str='u * pref0',
e_str='u * pref0 - Pref'
)
self.Psum = Algeb(tex_name='P_{tot}',
info='Sum of P signals',
v_str='u * (Pext + Pref + DB_y)',
e_str='u * (Pext + Pref + DB_y) - Psum',
) # `DB_y` is `Pdrp` (f droop)
self.PHL = Limiter(u=self.Psum, lower=0.0, upper=self.pmx,
enable=self.config.plim,
info='limiter for Psum in [0, pmx]',
)
self.Vcomp = VarService(v_str='abs(v*exp(1j*a) + (1j * xc) * (Ipout_y + 1j * Iqout_y))',
info='Voltage before Xc compensation',
tex_name='V_{comp}'
)
self.Vqu = ConstService(v_str='v1 - (qref0 - qmn) / dqdv',
info='Upper voltage bound => qmx',
tex_name='V_{qu}',
)
self.Vql = ConstService(v_str='v0 + (qmx - qref0) / dqdv',
info='Lower voltage bound => qmn',
tex_name='V_{ql}',
)
self.VQ1 = Limiter(u=self.Vcomp, lower=self.Vql, upper=self.v0,
info='Under voltage comparer for Q droop',
no_warn=True,
)
self.VQ2 = Limiter(u=self.Vcomp, lower=self.v1, upper=self.Vqu,
info='Over voltage comparer for Q droop',
no_warn=True,
)
Qdrp = 'u * VQ1_zl * qmx + VQ2_zu * qmn + ' \
'u * VQ1_zi * (qmx + dqdv *(Vqu - Vcomp)) + ' \
'u * VQ2_zi * (dqdv * (v1 - Vcomp)) '
self.Qdrp = Algeb(tex_name='Q_{drp}',
info='External power signal (for AGC)',
v_str=Qdrp,
e_str=f'{Qdrp} - Qdrp',
discrete=(self.VQ1, self.VQ2),
)
self.Qref = Algeb(tex_name=r'Q_{ref}',
info='Reference power signal (for scheduling setpoint)',
v_str='u * qref0',
e_str='u * qref0 - Qref'
)
self.Qsum = Algeb(tex_name=r'Q_{tot}',
info='Sum of Q signals',
v_str=f'u * (qref0 + {Qdrp})',
e_str='u * (Qref + Qdrp) - Qsum',
discrete=(self.VQ1, self.VQ2),
)
self.Ipul = Algeb(info='Ipcmd before Ip hard limit',
v_str='(Psum * PHL_zi + pmx * PHL_zu) / vp',
e_str='(Psum * PHL_zi + pmx * PHL_zu) / vp - Ipul',
tex_name='I_{p,ul}',
)
self.Iqul = Algeb(info='Iqcmd before Iq hard limit',
v_str='Qsum / vp',
e_str='Qsum / vp - Iqul',
tex_name='I_{q,ul}',
)
# --- Ipmax, Iqmax and Iqmin ---
Ipmaxsq = "(Piecewise((0, Le(ialim**2 - Iqcmd_y**2, 0)), ((ialim**2 - Iqcmd_y ** 2), True)))"
Ipmaxsq0 = "(Piecewise((0, Le(ialim**2 - (u*qref0/v)**2, 0)), ((ialim**2 - (u*qref0/v) ** 2), True)))"
self.Ipmaxsq = VarService(v_str=Ipmaxsq, tex_name='I_{pmax}^2')
self.Ipmaxsq0 = ConstService(v_str=Ipmaxsq0, tex_name='I_{pmax0}^2')
self.Ipmax = Algeb(v_str='(SWPQ_s1 * ialim + SWPQ_s0 * sqrt(Ipmaxsq0))',
e_str='(SWPQ_s1 * ialim + SWPQ_s0 * sqrt(Ipmaxsq)) - Ipmax',
tex_name='I_{pmax}',
)
Iqmaxsq = "(Piecewise((0, Le(ialim**2 - Ipcmd_y**2, 0)), ((ialim**2 - Ipcmd_y ** 2), True)))"
Iqmaxsq0 = "(Piecewise((0, Le(ialim**2 - (u*pref0/v)**2, 0)), ((ialim**2 - (u*pref0/v) ** 2), True)))"
self.Iqmaxsq = VarService(v_str=Iqmaxsq, tex_name='I_{qmax}^2')
self.Iqmaxsq0 = ConstService(v_str=Iqmaxsq0, tex_name='I_{qmax0}^2')
self.Iqmax = Algeb(v_str='SWPQ_s0 * ialim + SWPQ_s1 * sqrt(Iqmaxsq0)',
e_str='SWPQ_s0 * ialim + SWPQ_s1 * sqrt(Iqmaxsq) - Iqmax',
tex_name='I_{qmax}',
)
# TODO: set option whether to use degrading gain
# --- `Ipcmd` and `Iqcmd` ---
self.Ipcmd = GainLimiter(u=self.Ipul,
K=1, R='Fvl * Fvh * Ffl * Ffh * recflag + 1 * (1 - recflag)',
lower=0, upper=self.Ipmax,
info='Ip with limiter and coeff.',
tex_name='I^{pcmd}',
)
self.Iqcmd = GainLimiter(u=self.Iqul,
K=1, R='Fvl * Fvh * Ffl * Ffh * recflag + 1 * (1 - recflag)',
lower=self.Iqmax, sign_lower=-1,
upper=self.Iqmax,
info='Iq with limiter and coeff.',
tex_name='I^{qcmd}',
)
self.Ipout = Lag(u=self.Ipcmd_y, T=self.tip, K=1.0,
info='Output Ip filter',
)
self.Iqout = Lag(u=self.Iqcmd_y, T=self.tiq, K=1.0,
info='Output Iq filter',
)
class TestDiscrete(unittest.TestCase):
def setUp(self):
self.lower = NumParam()
self.upper = NumParam()
self.u = Algeb()
self.upper.v = np.array([2, 2, 2, 2, 2, 2, 2.8, 3.9])
self.u.v = np.array([-3, -1.1, -5, 0, 1, 2, 3, 10])
self.lower.v = np.array([-2, -1, 0.5, 0, 0.5, 1.5, 2, 3])
def test_limiter(self):
"""
Tests for `Limiter` class
Returns
-------
"""
self.cmp = Limiter(self.u, self.lower, self.upper)
self.cmp.list2array(len(self.u.v))
self.cmp.check_var()
self.assertSequenceEqual(self.cmp.zl.tolist(),
[1., 1., 1., 1., 0., 0., 0., 0.])
self.assertSequenceEqual(self.cmp.zi.tolist(),
[0., 0., 0., 0., 1., 0., 0., 0.])
self.assertSequenceEqual(self.cmp.zu.tolist(),
[0., 0., 0., 0., 0., 1., 1., 1.])
def test_sorted_limiter(self):
"""
Tests for `SortedLimiter` class
Returns
-------
"""
self.cmp = Limiter(self.u, self.lower, self.upper)
self.cmp.list2array(len(self.u.v))
self.cmp.check_var()
self.rcmp = SortedLimiter(self.u, self.lower, self.upper, n_select=1)
self.rcmp.list2array(len(self.u.v))
self.rcmp.check_var()
self.assertSequenceEqual(self.rcmp.zl.tolist(),
[0., 0., 1., 0., 0., 0., 0., 0.])
self.assertSequenceEqual(self.rcmp.zi.tolist(),
[1., 1., 0., 1., 1., 1., 1., 0.])
self.assertSequenceEqual(self.rcmp.zu.tolist(),
[0., 0., 0., 0., 0., 0., 0., 1.])
# test when no `n_select` is specified
self.rcmp_noselect = SortedLimiter(self.u, self.lower, self.upper)
self.rcmp_noselect.list2array(len(self.u.v))
self.rcmp_noselect.check_var()
self.assertSequenceEqual(self.rcmp_noselect.zl.tolist(),
self.cmp.zl.tolist())
self.assertSequenceEqual(self.rcmp_noselect.zi.tolist(),
self.cmp.zi.tolist())
self.assertSequenceEqual(self.rcmp_noselect.zu.tolist(),
self.cmp.zu.tolist())
# test when no `n_select` is over range
self.rcmp_noselect = SortedLimiter(self.u,
self.lower,
self.upper,
n_select=999)
self.rcmp_noselect.list2array(len(self.u.v))
self.rcmp_noselect.check_var()
self.assertSequenceEqual(self.rcmp_noselect.zl.tolist(),
self.cmp.zl.tolist())
self.assertSequenceEqual(self.rcmp_noselect.zi.tolist(),
self.cmp.zi.tolist())
self.assertSequenceEqual(self.rcmp_noselect.zu.tolist(),
self.cmp.zu.tolist())
def test_switcher(self):
p = NumParam()
p.v = np.array([0, 1, 2, 2, 1, 3, 1])
switcher = Switcher(u=p, options=[0, 1, 2, 3, 4])
switcher.list2array(len(p.v))
switcher.check_var()
self.assertSequenceEqual(switcher.s0.tolist(), [1, 0, 0, 0, 0, 0, 0])
self.assertSequenceEqual(switcher.s1.tolist(), [0, 1, 0, 0, 1, 0, 1])
self.assertSequenceEqual(switcher.s2.tolist(), [0, 0, 1, 1, 0, 0, 0])
self.assertSequenceEqual(switcher.s3.tolist(), [0, 0, 0, 0, 0, 1, 0])
self.assertSequenceEqual(switcher.s4.tolist(), [0, 0, 0, 0, 0, 0, 0])
def __init__(self, system, config):
PSSBase.__init__(self, system, config)
# ALL THE FOLLOWING IS FOR INPUT 2
# retrieve indices of bus and bus freq
self.buss2 = DataSelect(self.busr2,
self.bus,
info='selected bus (bus or busr)')
self.busfreq2 = DeviceFinder(self.busf2,
link=self.buss2,
idx_name='bus')
# from Bus
self.v2 = ExtAlgeb(
model='Bus',
src='v',
indexer=self.buss2,
tex_name=r'V',
info='Bus (or busr2, if given) terminal voltage',
)
# from BusFreq 2
self.f2 = ExtAlgeb(model='FreqMeasurement',
src='f',
indexer=self.busfreq2,
export=False,
info='Bus frequency 2')
# Config
self.config.add(OrderedDict([('freq_model', 'BusFreq')]))
self.config.add_extra(
'_help', {'freq_model': 'default freq. measurement model'})
self.config.add_extra('_alt', {'freq_model': ('BusFreq', )})
self.busf.model = self.config.freq_model
self.busf2.model = self.config.freq_model
# input signal switch
self.dv = Derivative(self.v)
self.dv2 = Derivative(self.v2)
self.SnSb = ExtService(
model='SynGen',
src='M',
indexer=self.syn,
attr='pu_coeff',
info='Machine base to sys base factor for power',
tex_name='(Sb/Sn)')
self.SW = Switcher(
u=self.MODE,
options=[0, 1, 2, 3, 4, 5, 6, np.nan],
)
self.SW2 = Switcher(
u=self.MODE2,
options=[0, 1, 2, 3, 4, 5, 6, np.nan],
)
# Input signals
self.sig = Algeb(
tex_name='S_{ig}',
info='Input signal',
)
self.sig.v_str = 'SW_s1*(omega-1) + SW_s2*0 + SW_s3*(tm0/SnSb) + ' \
'SW_s4*(tm-tm0) + SW_s5*v + SW_s6*0'
self.sig.e_str = 'SW_s1*(omega-1) + SW_s2*(f-1) + SW_s3*(te/SnSb) + ' \
'SW_s4*(tm-tm0) + SW_s5*v + SW_s6*dv_v - sig'
self.sig2 = Algeb(
tex_name='S_{ig2}',
info='Input signal 2',
)
self.sig2.v_str = 'SW2_s1*(omega-1) + SW2_s2*0 + SW2_s3*(tm0/SnSb) + ' \
'SW2_s4*(tm-tm0) + SW2_s5*v2 + SW2_s6*0'
self.sig2.e_str = 'SW2_s1*(omega-1) + SW2_s2*(f2-1) + SW2_s3*(te/SnSb) + ' \
'SW2_s4*(tm-tm0) + SW2_s5*v2 + SW2_s6*dv2_v - sig2'
self.L1 = Lag(
u=self.sig,
K=self.K1,
T=self.T1,
info='Transducer 1',
)
self.L2 = Lag(
u=self.sig2,
K=self.K2,
T=self.T2,
info='Transducer 2',
)
self.IN = Algeb(
tex_name='I_N',
info='Sum of inputs',
v_str='L1_y + L2_y',
e_str='L1_y + L2_y - IN',
)
self.WO = WashoutOrLag(
u=self.IN,
K=self.T3,
T=self.T4,
)
self.LL1 = LeadLag(
u=self.WO_y,
T1=self.T5,
T2=self.T6,
zero_out=True,
)
self.LL2 = LeadLag(
u=self.LL1_y,
T1=self.T7,
T2=self.T8,
zero_out=True,
)
self.LL3 = LeadLag(
u=self.LL2_y,
T1=self.T9,
T2=self.T10,
zero_out=True,
)
self.VSS = GainLimiter(u=self.LL3_y,
K=1,
lower=self.LSMIN,
upper=self.LSMAX)
self.VOU = ConstService(v_str='VCUr + v0')
self.VOL = ConstService(v_str='VCLr + v0')
self.OLIM = Limiter(u=self.v,
lower=self.VOL,
upper=self.VOU,
info='output limiter')
self.vsout.e_str = 'OLIM_zi * VSS_y - vsout'
def __init__(self, system, config):
PSSBase.__init__(self, system, config)
self.config.add(OrderedDict([('freq_model', 'BusFreq')]))
self.config.add_extra(
'_help', {'freq_model': 'default freq. measurement model'})
self.config.add_extra('_alt', {'freq_model': ('BusFreq', )})
self.busf.model = self.config.freq_model
self.dv = Derivative(self.v)
self.SnSb = ExtService(
model='SynGen',
src='M',
indexer=self.syn,
attr='pu_coeff',
info='Machine base to sys base factor for power',
tex_name='(Sb/Sn)')
self.SW = Switcher(
u=self.MODE,
options=[1, 2, 3, 4, 5, 6],
)
self.sig = Algeb(
tex_name='S_{ig}',
info='Input signal',
)
self.sig.v_str = 'SW_s0*(omega-1) + SW_s1*0 + SW_s2*(tm0/SnSb) + ' \
'SW_s3*(tm-tm0) + SW_s4*v + SW_s5*0'
self.sig.e_str = 'SW_s0*(omega-1) + SW_s1*(f-1) + SW_s2*(te/SnSb) + ' \
'SW_s3*(tm-tm0) + SW_s4*v + SW_s5*dv_v - sig'
self.F1 = Lag2ndOrd(u=self.sig, K=1, T1=self.A1, T2=self.A2)
self.F2 = LeadLag2ndOrd(u=self.F1_y,
T1=self.A3,
T2=self.A4,
T3=self.A5,
T4=self.A6,
zero_out=True)
self.LL1 = LeadLag(u=self.F2_y, T1=self.T1, T2=self.T2, zero_out=True)
self.LL2 = LeadLag(u=self.LL1_y, T1=self.T3, T2=self.T4, zero_out=True)
self.Vks = Gain(u=self.LL2_y, K=self.KS)
self.WO = WashoutOrLag(u=self.Vks_y,
T=self.T6,
K=self.T5,
name='WO',
zero_out=True) # WO_y == Vss
self.VLIM = Limiter(u=self.WO_y,
lower=self.LSMIN,
upper=self.LSMAX,
info='Vss limiter')
self.Vss = Algeb(
tex_name='V_{ss}',
info='Voltage output before output limiter',
e_str='VLIM_zi * WO_y + VLIM_zu * LSMAX + VLIM_zl * LSMIN - Vss')
self.OLIM = Limiter(u=self.v,
lower=self.VCLr,
upper=self.VCUr,
info='output limiter')
self.vsout.e_str = 'OLIM_zi * Vss - vsout'
def __init__(self, system=None, config=None):
PQData.__init__(self)
Model.__init__(self, system, config)
self.group = 'StaticLoad'
# ``tds`` flag is needed to retrieve initial voltage (for constant Z/I conversion)
self.flags.update({'pflow': True,
'tds': True,
})
self.config.add(OrderedDict((('pq2z', 1),
('p2p', 0.0),
('p2i', 0.0),
('p2z', 1.0),
('q2q', 0.0),
('q2i', 0.0),
('q2z', 1.0),
)))
self.config.add_extra("_help",
pq2z="pq2z conversion if out of voltage limits",
p2p="P constant power percentage for TDS. Must have (p2p+p2i+p2z)=1",
p2i="P constant current percentage",
p2z="P constant impedance percentage",
q2q="Q constant power percentage for TDS. Must have (q2q+q2i+q2z)=1",
q2i="Q constant current percentage",
q2z="Q constant impedance percentage",
)
self.config.add_extra("_alt",
pq2z="(0, 1)",
p2p="float",
p2i="float",
p2z="float",
q2q="float",
q2i="float",
q2z="float",
)
self.config.add_extra("_tex",
pq2z="z_{pq2z}",
p2p=r"\gamma_{p2p}",
p2i=r"\gamma_{p2i}",
p2z=r"\gamma_{p2z}",
q2q=r"\gamma_{q2q}",
q2i=r"\gamma_{q2i}",
q2z=r"\gamma_{q2z}",
)
self.a = ExtAlgeb(model='Bus',
src='a',
indexer=self.bus,
tex_name=r'\theta',
)
self.v = ExtAlgeb(model='Bus',
src='v',
indexer=self.bus,
tex_name=r'V',
)
self.v0 = ExtService(src='v',
model='Bus',
indexer=self.bus,
tex_name='V_0',
info='Initial voltage magnitude from power flow'
)
self.a0 = ExtService(src='a',
model='Bus',
indexer=self.bus,
tex_name=r'\theta_0',
info='Initial voltage angle from power flow'
)
# Rub, Xub, Rlb, Xlb are constant for both PF and TDS.
self.Rub = ConstService(info='Equivalent resistance at voltage upper bound',
v_str='p0 / vmax**2',
tex_name='R_{ub}'
)
self.Xub = ConstService(info='Equivalent reactance at voltage upper bound',
v_str='q0 / vmax**2',
tex_name='X_{ub}'
)
self.Rlb = ConstService(info='Equivalent resistance at voltage lower bound',
v_str='p0 / vmin**2',
tex_name='R_{lb}'
)
self.Xlb = ConstService(info='Equivalent reactance at voltage lower bound',
v_str='q0 / vmin**2',
tex_name='X_{lb}'
)
# Ppf, Qpf, Req, Xeq, Ipeq, Iqeq are only meaningful after initializing TDS
self.Ppf = ConstService(info='Actual P in power flow',
v_str='(p0 * vcmp_zi + Rlb * vcmp_zl * v0**2 + Rub * vcmp_zu * v0**2)',
tex_name='P_{pf}')
self.Qpf = ConstService(info='Actual Q in power flow',
v_str='(q0 * vcmp_zi + Xlb * vcmp_zl * v0**2 + Xub * vcmp_zu * v0**2)',
tex_name='Q_{pf}')
self.Req = ConstService(info='Equivalent resistance at steady state',
v_str='Ppf / v0**2',
tex_name='R_{eq}'
)
self.Xeq = ConstService(info='Equivalent reactance at steady state',
v_str='Qpf / v0**2',
tex_name='X_{eq}'
)
self.Ipeq = ConstService(info='Equivalent active current source at steady state',
v_str='Ppf / v0',
tex_name='I_{peq}'
)
self.Iqeq = ConstService(info='Equivalent reactive current source at steady state',
v_str='Qpf / v0',
tex_name='I_{qeq}'
)
self.vcmp = Limiter(u=self.v,
lower=self.vmin,
upper=self.vmax,
enable=self.config.pq2z,
)
# Note: the "or" condition "|" is not supported in sympy equation strings.
# They will simply be ignored.
# To modify P and Q during TDS, use `alter` to set values to `Ppf` and `Qpf`
# after, before simulation, setting `config.p2p=1` and `config.q2q=1`.
self.a.e_str = "u * (dae_t <= 0) * " \
"(p0 * vcmp_zi + Rlb * vcmp_zl * v**2 + Rub * vcmp_zu * v**2) + " \
"u * (dae_t > 0) * " \
"(p2p * Ppf + p2i * Ipeq * v + p2z * Req * v**2)"
self.v.e_str = "u * (dae_t <= 0) * " \
"(q0 * vcmp_zi + Xlb * vcmp_zl * v**2 + Xub * vcmp_zu * v**2) + " \
"u * (dae_t > 0) * " \
"(q2q * Qpf + q2i * Iqeq * v + q2z * Xeq * v**2)"
def __init__(self):
# -- Voltage protection
# Indicatior of voltage deviation
self.LVl1 = Limiter(u=self.v,
lower=self.vl4, upper=self.vl1,
info='Voltage comparer for (vl4, vl1)',
equal=False, no_warn=True,
)
self.LVl2 = Limiter(u=self.v,
lower=self.vl4, upper=self.vl2,
info='Voltage comparer for (vl4, vl2)',
equal=False, no_warn=True,
)
self.LVl3 = Limiter(u=self.v,
lower=self.vl4, upper=self.vl3,
info='Voltage comparer for (vl4, vl3)',
equal=False, no_warn=True,
)
self.LVu1 = Limiter(u=self.v,
lower=self.vu1, upper=self.vu3,
info='Voltage comparer for (vu1, vu3)',
equal=False, no_warn=True,
)
self.LVu2 = Limiter(u=self.v,
lower=self.vu2, upper=self.vu3,
info='Voltage comparer for (vu2, vu3)',
equal=False, no_warn=True,
)
# Voltage deviation time continuity check
self.IAWVl1 = IntegratorAntiWindup(u='LVl1_zi * (1 - res) - Tvl1 / Tres * res',
T=1, K=1, y0='0',
lower=self.zero, upper=self.Tvl1,
info='condition check for (Vl3, Vl1)',
no_warn=True,
)
self.IAWVl2 = IntegratorAntiWindup(u='LVl2_zi * (1 - res) - Tvl2 / Tres * res',
T=1, K=1, y0='0',
lower=self.zero, upper=self.Tvl2,
info='condition check for (Vl3, Vl2)',
no_warn=True,
)
self.IAWVl3 = IntegratorAntiWindup(u='LVl2_zi * (1 - res) - Tvl3 / Tres * res',
T=1, K=1, y0='0',
lower=self.zero, upper=self.Tvl2,
info='condition check for (Vl3, Vl2)',
no_warn=True,
)
self.IAWVu1 = IntegratorAntiWindup(u='LVu1_zi * (1 - res) - Tvu1 / Tres * res',
T=1, K=1, y0='0',
lower=self.zero, upper=self.Tvu1,
info='condition check for (Vu1, Vu3)',
no_warn=True,
)
self.IAWVu2 = IntegratorAntiWindup(u='LVu2_zi * (1 - res) - Tvu2 / Tres * res',
T=1, K=1, y0='0',
lower=self.zero, upper=self.Tvu2,
info='condition check for (Vu2, Vu3)',
no_warn=True,
)
def __init__(self, system, config):
Model.__init__(self, system, config)
self.flags.tds = True
self.group = 'DGProtection'
self.bus = ExtParam(model='DG', src='bus',
indexer=self.dev,
export=False)
self.fn = ExtParam(model='DG', src='fn',
indexer=self.dev,
export=False)
# -- Frequency protection
# Convert frequency deviation range to p.u.
self.f = ExtAlgeb(export=False,
info='DG frequency read value', unit='p.u.',
model='FreqMeasurement', src='f',
indexer=self.busfreq,
)
self.fHz = Algeb(v_str='fn * f',
e_str='fn * f - fHz',
info='frequency in Hz',
tex_name=r'f_{Hz}',
)
# -- Lock DG frequency signal and output power
self.ltu = ConstService(v_str='0.8')
self.ltl = ConstService(v_str='0.2')
# `Ldsum_zu` is `ue`
dsum = 'fen * (IAWfl1_lim_zu * Lfl1_zi + IAWfl2_lim_zu * Lfl2_zi + ' \
'IAWfu1_lim_zu * Lfu1_zi + IAWfu2_lim_zu * Lfu2_zi) + ' \
'Ven * (IAWVl1_lim_zu * LVl1_zi + IAWVl2_lim_zu * LVl2_zi + ' \
'IAWVl3_lim_zu * LVl3_zi + ' \
'IAWVu1_lim_zu * LVu1_zi + IAWVu2_lim_zu * LVu2_zi) - ' \
'dsum'
self.dsum = Algeb(v_str='0',
e_str=dsum,
info='lock signal summation',
tex_name=r'd_{tot}',
)
self.Ldsum = Limiter(u=self.dsum,
lower=self.ltl,
upper=self.ltu,
info='lock signal comparer, zu is to act',
equal=False, no_warn=True,
)
self.ue = Algeb(v_str='0',
e_str='Ldsum_zu - ue',
info='lock flag',
tex_name=r'ue',
)
self.zero = ConstService('0')
self.res = ExtendedEvent(self.ue, t_ext=self.Tres,
trig="rise",
extend_only=True)
# lock DG frequency signal
# fflag option 1: leave source signal online in protection
self.fin = ExtAlgeb(model='DG', src='f',
indexer=self.dev,
info='original f from DG',
)
self.fHzl = ExtAlgeb(model='DG', src='fHz',
indexer=self.dev,
export=False,
e_str='- ue * (fn * f)',
info='Frequency measure lock',
ename='fHzl',
tex_ename='f_{Hzl}',
)
# TODO: add fflag option 2: block the source signal in protection
# lock output power of DG
self.Pext = ExtAlgeb(model='DG', src='Pext',
indexer=self.dev,
info='original Pext from DG',
)
self.Pref = ExtAlgeb(model='DG', src='Pref',
indexer=self.dev,
info='original Pref from DG',
)
self.Pdrp = ExtAlgeb(model='DG', src='DB_y',
indexer=self.dev,
info='original Pdrp from DG',
)
self.Psum = ExtAlgeb(model='DG', src='Psum',
indexer=self.dev,
export=False,
e_str='- ue * (Pext + Pref + Pdrp)',
info='Active power lock',
ename='Pneg',
tex_ename='P_{neg}',
)
self.Qdrp = ExtAlgeb(model='DG', src='Qdrp',
indexer=self.dev,
info='original Qdrp from DG',
)
self.Qref = ExtAlgeb(model='DG', src='Qref',
indexer=self.dev,
info='original Qref from DG',
)
self.Qsum = ExtAlgeb(model='DG', src='Qsum',
indexer=self.dev,
export=False,
e_str='- ue * (Qdrp + Qref)',
info='Reactive power lock',
ename='Qneg',
tex_ename='Q_{neg}',
)
def __init__(self, system=None, config=None):
PQData.__init__(self)
Model.__init__(self, system, config)
self.group = 'StaticLoad'
# ``tds`` flag is added to retrieve initial voltage (for constant Z or constant I conversion)
self.flags.update({'pflow': True,
'tds': True,
})
self.config.add(OrderedDict((('pq2z', 1),
('p2p', 0),
('p2i', 0), # not in use
('p2z', 1),
('q2q', 0),
('q2i', 0), # not in use
('q2z', 1),
)))
self.a = ExtAlgeb(model='Bus',
src='a',
indexer=self.bus,
tex_name=r'\theta',
)
self.v = ExtAlgeb(model='Bus',
src='v',
indexer=self.bus,
tex_name=r'V',
)
self.v0 = ExtService(src='v',
model='Bus',
indexer=self.bus,
tex_name='V_0',
info='Initial voltage magnitude from power flow'
)
self.a0 = ExtService(src='a',
model='Bus',
indexer=self.bus,
tex_name=r'\theta_0',
info='Initial voltage angle from power flow'
)
self.Req = ConstService(info='Equivalent resistance',
v_str='p0 / v0**2',
)
self.Xeq = ConstService(info='Equivalent reactance',
v_str='q0 / v0**2',
)
self.vcmp = Limiter(u=self.v,
lower=self.vmin,
upper=self.vmax,
enable=self.config.pq2z,
)
self.a.e_str = "u * ((dae_t <= 0) | (p2p == 1)) * " \
"(p0 * vcmp_zi + " \
"p0 * vcmp_zl * (v ** 2 / vmin ** 2) + "\
"p0 * vcmp_zu * (v ** 2 / vmax ** 2)) + " \
"u * ((dae_t > 0) & (p2p != 1)) * " \
"(p2p * p0 + p2z * Req * v**2)"
self.v.e_str = "u * ((dae_t <= 0) | (q2q == 1)) * " \
"(q0 * vcmp_zi + " \
"q0 * vcmp_zl * (v ** 2 / vmin ** 2) + " \
"q0 * vcmp_zu * (v ** 2 / vmax ** 2)) + " \
"u * ((dae_t > 0) & (q2q != 1)) * " \
"(q2q * q0 + q2z * Xeq * v**2)"