Day-Ahead Locational Market Clearing Prices Analyzer (DAYZER). Cambridge Energy Solutions has developed DAYZER to assist electric power market participants in analyzing the locational market clearing prices and the associated transmission congestion costs in competitive electricity markets. Using DAYZER algorithms as a core, CES has published models for each of the competitive electric markets in North America and some larger regions such as the WECC. This tool simulates the operation of the electricity markets by mimicking the dispatch procedures used by the corresponding independent system operators (ISOs), and replicates the calculations made by the ISOs in solving for the security-constrained, least-cost unit commitment and dispatch in the Day-Ahead markets.

DAYZER forecasts hourly locational market-clearing prices and congestion costs, using the most recently available assumptions on generator economics, fuel prices, demand forecast, unit and transmission line outages, and emission permits costs, which are fully integrated into the DAYZER model and updated on CES servers on a monthly, daily, or hourly basis. Any of these assumptions can be easily overwritten by the user. DAYZER incorporates all the security, reliability, economic and engineering constraints on generation units and transmission system components. It can be easily modified to emulate the specific operation of any regional market and the dispatch or operating procedures adopted and used by various ISOs. It is tailor-made for each regional market to capture the particularities of that market. DAYZER is currently available for the CAISO, ERCOT, MISO, NEPOOL, NYISO, ONTARIO, PJM, SPP and WECC markets, and we also published a combined model for the PJM-MISO region. DAYZER has the following features:

  1. Easy to use
  2. Accurate security-constrained unit commitment and dispatch algorithms that mimics those used by the ISOs in the Day-Ahead market
  3. Accurate and up-to-data inputs and assumptions Uses NAPD for information on generation and transmission system elements (see database description below)
  4. Accurate modeling of each market with its own particularities (second contingency constraints, losses methodology, locational reserve markets, etc..)
  5. Captures marginal transmission losses in dispatch and clearing prices in markets where implemented
  6. Graphical user interface plus Access database output, plus many reports that make the model transparent and flexible.
  7. Captures transmission outages, transmission contingencies, nomograms, as well as planned transmission upgrades
  8. Accurate modeling of phase angle regulators, loop flows and Imports/Exports from neighboring regions or DC ties.
  9. Allows users to analyze various scenarios and quantify the impact of key market drivers
  10. Tested against actual market prices with excellent results (see DAYZER brochure)
  11. In addition to DAYZER as a core, DAYZER long-term uses the following modules:
    • Long–term load forecast (based on historical load shape and forecasted peak demand)
    • Fuel prices from NYMEX (Fuel Oil and Natural Gas)
    • Random Outage using Bernoulli probability model
    • Maintenance schedule (optimized based on reserves)