Nodes will be modeled on both the PTF and non-PTF systems, consistent with requirements to model actual generator and/or Dispatchable Load locations on the system.

The Nodes that comprise the Hub are listed below.   In addition, the proposed Load Zones are also shown in the graphic.  To the extent possible, Load Zones follow political boundaries.  The SMD software implementation will allow for changes in Load Zones.

Hub Nodes:
NORTHFLD 345 
LUDLOW 345 
CARPTRHL 345 
SANDY_PD 345 
MILLBURY 345 
PRAT_J 230 
LUDLOW 115 
PALMER 115 
W_CHRLTN 115
CARPTRHL 115 
N_OXFORD 115 
WBSTR_ST 115 
BARRE 115 
BLOMNGDL 115 
NASHUA 115 
GREENDAL 115 
ROLF_AVE 115 
W_BOYLST 115 
WACHUS 115 
PRAT_J 115 
WENDLDPT 115 
WYMNGRDN 115 
VERNONHL 115 
E_MAIN_S 115 
NRTHBORO 115 
PAXTON 115
STERLING
AYER 115 
SANDY_PD 115 
MILLBURY 115 
THORNDIK 115 
LITTLRST 115
Corrected  3/15/02)

Under SMD, all generators, including under 5 MW generators, will have generation obligations at the Node and settle at the Node. Under 5 MW generators will be price takers and will not be eligible to set LMP.

Yes.

From the Restated NEPOOL Agreement, the System Operator shall calculate Locational Prices for the Day-Ahead and Real-Time Markets as described below.

The System Operator shall calculate Nodal Prices for an hour for the Day-Ahead Market or the Real-Time Market at a given Node i using the following formula, or a formula similar in substance and effect:

where:
the Nodal Price at Node i in $/megawatthour;

the marginal cost in $/megawatthour, based on Demand Bids and Supply Offers, to serve additional load at the Reference Node;

the Marginal Loss Component of the Nodal Price at Node i in $/megawatthour; and

the Congestion Component of the Nodal Price at Node i in $/megawatthour.

The Marginal Loss Component of the Nodal Price at any Node i on the NEPOOL Transmission System is calculated using the equation

in which WFi, the Withdrawal Factor at Node i relative to the system Reference Node, is calculated using the following equation:



where:

L = NEPOOL Transmission System losses;
Pi = the net amount of Energy injected into the NEPOOL Transmission System at Node i; and



= the ratio of: (1) the amount by which NEPOOL Transmission System losses occurring in the Day-Ahead Schedule or Real-Time dispatch would have increased, as calculated by the System Operators Day-Ahead or Real-Time computer algorithm, if a very small additional amount of Energy had been injected at Node i (in addition to the injections and withdrawals already scheduled to occur on the NEPOOL Transmission System in the Day-Ahead schedule or occurring on the NEPOOL Transmission System in the Real-Time dispatch), to (2) the size of the additional injection of Energy at Node i.