Declaration of power generation from thermal power units: Research on marginal electricity prices and start-up and shutdown recommendations Tariff Rates

This article is related to the research on the marginal electricity price declaration and start-up and shutdown recommendations of thermal power units, including problem introduction, mathematical model establishment, problem solving and application demonstration.

1. Problem description

A certain group enterprise A is located in a certain provinceOwn multiple power plants and several different types of generators, which signedAfter the annual, quarterly, monthly, ten-day, daily and other contracts are combinedPromise indifferent times of the dayMeet the power load requirements in Table 1 below.

Table 1 Electricity demand on a certain day

There are three different types of generator sets in many power plants, and each generator set has a hot start cost, a minimum operating output, and a maximum operating output. As shown in Table 2 below:

Table 2 Generator set output

We assume that the marginal output increase is a linear function with increasing load.

In addition, in order to ensure the safety of power output and prevent sudden failure of a certain unit, Group A stipulates that in addition to meeting the estimated load demand, it must ensure that the units that are turned on in each period can meet a temporary increase in the estimated load demand of more than 15%.

In order to meet the economic benefits of electricity demand:

1) Which units should be turned on at what time of day to minimize the total cost?

2) What is the marginal cost of electricity production at each time of day?

3) How much additional cost will be required for 15% security?