Modeling method of combined heat and power optimal dispatching model

A method for dispatching an optimal combined heat by a combined heat power (CHP) apparatus, characterized in that the CHP apparatus comprises a computer-readable device and an instruction;

• the CHP apparatus is used for controlling a district heating system (DHS) comprising a heat source, a heating network and a heat load, the heating network comprises a heat transmission network and a heat distribution network, and the CHP apparatus executes a processor for performing the following steps:
• step 1:
• receiving, by the processor, a plurality of heating areas based on a distance from the heat load to the heat source, and a plurality of time periods based on different time in one day;
• collecting heat data from the heat source that comprises conventional generators, CHP unit, wind power units, -electric boilers and heat storage tanks;
• step 2:
• collecting data of heat transmission loss from the heat distribution network, and establishing a heat transmission network module for creating transmission time delay of the heating network based on the heat transmission network;
• wherein the heat transmission loss comprises each heating area within each time period and establishing a confluence node module of the heat transmission network which is a steady state heat transmission of the heat transmission network;
• wherein the heat transmission network module comprises:
• (1) collecting an external diameter of a pipeline, a distance between center of the pipeline and soil surface, and a heat transfer coefficient of soil;
• generating, by the processor, a thermal resistance of soil and a temperature loss of hot water in the pipeline;
• (2) measuring a mass flow of water in the pipeline, a water quality flow to an end heat exchange station and a mass flow out rate of water from the end heat exchange station;
• generating, by the processor, continuity constraints of mass flow rates of nodes considering time delay;
• (3) measuring water supply temperature and water return temperature of a heat-exchange station in a period;
• generating, by the processor, a water temperature at a confluence node;
• (4) by the processor, receiving a maximum mass flow rate flowing through the heat-exchange station and maximum mass flow rate of a water supply pipeline, and generating a pipeline flow rate limitation;
• (5) collecting pipeline parameters, water density, mass flow and pressure of each node of a heating pipeline;
• generating, by the processor, a pressure loss;
• and
• (6) by the processor, receiving heat-exchange power of the heat-exchange station and generating a heat-exchange power of the heat-exchange station;
• step 3:
• creating a terminal heat consumer module that being capable of reflecting indoor temperature according to the heat load;
• step 4:
• establishing the optimal CHP module that being capable of controlling heat generation from the heat source;
• and
• step 5:
• re-distributing heat from the heat source to the heat load.