Research Or Load Dispatching Model And Strategy Under Mutual Aid Mode Of Power Generation And Utilization

With reform of global energy structure and under the background that energy conservation and emission reduction are carried out and use ratio of electric energy consumption is improved, renewable energy sources are intruded largely, which puts higher requirements for a system’s capability of pitch peak and frequency modulation. It is of great significance to develop demand side management energetically and give full play to bidirectional mutual aid of a power supply system and load user side for development of smart power grids. At the same time, load dispatching has become an important symbol and function of smart power grids. In power grids where distributed generation is connected, how to include routinization of load side resources in dispatching and operation of the electrical power system and develop demand side management effective has become an important research topic with practical significance.This thesis deeply discusses researches and practice about load dispatching under the mode that electric generation and utilization aid mutually. First of all, it starts with impacts of user side on dispatching and systematically analyzes source and load specialty of distributed generation and its influence on dispatching modes, regulating effect of time-of-use electricity price as an economic leverage, and huge potential that interruptible load has to improve the system’s capability of pitch peak and frequency modulation. Secondly, it outlines and summarizes types of demand response and load dispatching in smart power grids. Based on the two aspects, it puts forward the core theory that electric generation and utilization aid mutually. Next, it elaborates new requirements of mutual aid between electric generation and utilization for load dispatching. Via focusing on introducing the method of time-of-use electricity price, it constructs a planning model about dispatching of electric generation and utilization on the basis that impacts of demand side response of interruptible load on economy related to electric generation and utilization are considered comprehensively. At last, it proposes a’five-principle’strategic core based on mathematic models, and designs a combining scheme about impacts that introduction of step tariff and interruptible load have on load curves and units by economical efficiency of an IEEE14node test model and in combination of cases about calculation of daily load data in a certain place. In this way, feasibility and effectiveness of the model and strategies proposed in this thesis are verified.