A peak shaving method of a power network in a high wind and light permeability area based on load contro

Abstract

The invention provides a peak shaving method of a power network in a high wind and light permeability area based on load control. The joint peak shaving optimization model involved with a load control, peak shaving of thermal power plant, tie-line regulation, wind and light discarding jointly participate in is established. By setting different permissible fluctuation limits for tie lines and calculating the model, the optimized peak shaving scheme can be obtained, thus reducing the total payment cost of the system and improving the absorptive capacity of new energy sources. Advantages: 1. It can form complementary advantages with traditional thermal power peak shaving, obviously enhance the peak shaving capacity of local power grid, and improve the consumption level of new energy; 2. Adding the necessary constraint conditions to the load control, which improves the accuracy of the calculation results; 3. Considering the cost of discarding wind and light and the peak shaving of tie linecaused by the uncertainty of new energy output, which is more in line with the actual situation of power system operation, it has a good guiding significance for the new energy with high energy consumption load to enter the peak shaving area, and has a good popularization value and application prospect.

Description

technical field [0001] The invention belongs to the field of power system operation and control, and in particular relates to a peak-shaving scheme of a regional power grid in which load control participates. Background technique [0002] In recent years, my country's wind power and photovoltaic industries have been vigorously developed. As of the end of 2017, the cumulative installed capacity of wind power in my country reached 164GW, and the cumulative installed capacity of photovoltaics reached 130GW. However, my country's energy resources and loads are geographically distributed in reverse. Regions rich in wind and solar resources tend to have lower load levels, and it is difficult for regional loads to absorb large-scale access to new energy. At the same time, the rapid growth of wind and solar development does not match the development of the power grid, resulting in various problems in the cross-regional consumption of new energy. In addition, wind energy and solar ...

AI Technical Summary

Problems solved by technology

[0008] Most of the existing patents study the strategy of absorbing known output new energy from the perspective of high energy-consuming loads participating in demand-side response, but seldom involve the cost of curtailing wind and solar power caused by the inability to fully absorb large-scale new energy, but In the actual system, it is unavoidable to abandon wind and light when the load of wind and solar power generation is small, so this is inconsistent with the actual operation of the power system

At the same time, there are few related patents that consider the power fluctuation of the tie line. Setting the transmission power of the tie line as a fixed value or considering the research object as self-sufficient is not consistent with the reality of the power system.

There are also some patents that only regard high-energy-consuming loads as adjustable objects, but do not involve their adjustment performance, and do not take into account the characteristics that they mainly serve production rather than power dispatching, so they lack necessary constraints, which makes the content of patents in actual production It is more difficult to promote

Images