Intelligent control method of peak-valley load balance of high-tension distribution network

Abstract

The invention discloses an intelligent control method of peak-valley load balance of a high-tension distribution network. An intelligent peak-value load balance management subsystem of a low-tension transformer area is used for primary peak adjustment in the balancing process, secondary peak adjustment is carried out by the distribution network itself, energy storage compensation and photovoltaiccompensation are used to clip the peak and fill the valley in the balancing process, the supply side determines the quantity of running generator sets to the power supply load demand of each transformer area and the power supply load of the power grid, the number of running sets during the peak is reduced, the power supply cost is reduced, peak adjusting fluctuation of the transformer area is limited within + / -5%, approximately linear power output is realized, the power generating set is prevented from idle running, and equipment of the generating set is kept safe.

Description

technical field [0001] The invention relates to an intelligent technology for power supply in a station area, in particular to an intelligent control method for peak-valley load balance of a high-voltage distribution network. Background technique [0002] There is diversity and uncertainty in power demand, and the peak-to-valley difference is close to 50%, so that the power generation and power supply capacity set to meet the customer's maximum demand will be idled during the low demand period, increasing the investment in generator sets and increasing investment waste. The efficiency is reduced and the cost of electricity price is increased. At the same time, energy consumption is increased and more pollutants are discharged, which does not meet the requirements of energy conservation and emission reduction. [0003] Faced with this objectively existing problem, our country has adopted various measures: [0004] 1) Daylight saving time, the so-called daylight saving time i...

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Problems solved by technology

[0004]1) Daylight Saving Time, the so-called Daylight Saving Time is a system that artificially sets the local time in order to save energy. Generally, the time is artificially advanced by one day in summer when the dawn is early Hours can make people get up early and go to bed early, reduce the amount of lighting, so as to make full use of light resources, thereby saving lighting electricity. From 1986 to 1991, our country implemented daylight saving time for 6 years nationwide, but after statistical calculations, daylight saving time The time system does not change the peak-valley difference, but advances the time when the peak-valley appears, and the daylight saving time will also disturb people's normal biological clock and the normal operation of society;

[0005]2) Peak-shaving supply side. In reality, most of them are pumped storage power stations. It is a hydropower station that releases water to the lower reservoir for power generation. It can convert the excess electric energy when the grid load is low into high-value electric energy during the peak period of the grid. It is also suitable for frequency modulation and phase modulation, stabilizing the cycle and voltage of the power system, and is suitable for accident Standby can also improve the efficiency of thermal power plants and nuclear power plants in the system, but pumped storage power plants have a long construction period and high site requirements, making it difficult to promote them on a large scale, and pumped storage power plants will generate a lot of energy in the process of energy conversion loss;

[0006]3) Peak and valley electricity price management measures, peak and valley electricity prices are calculated according to peak electricity consumption and low valley electricity consumption, and the peak and valley electricity price system can give full play to the economic leverage of prices , to mobilize the enthusiasm of users to cut peaks and fill valleys, and balance power consumption, improve the load rate of the grid and equipment utilization, achieve the purpose of controlling peak loads, making full use of low-peak power grids, and at the same time achieve the purpose of reasonable cost allocation, although from 2012 Since July 2010, the tiered electricity price system for residents has been implemented in most provinces and cities in my country, but the management of peak and valley electricity prices cannot solve the existing problems from the source

[0007]Due to the limitations of the above measures, the current national peak-shaving capacity can only reach 1.7%, which is far from meeting the actual demand. How to enhance the peak-valley load of the power grid Balance ability has become an urgent problem to be solved today

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