Intelligent management method for peak-valley load balance of low-tension transformer area

Abstract

The invention discloses an intelligent management method for peak-valley load balance of a low-tension transformer area. Energy storage compensation and photovoltaic compensation are used to clip thepeak and fill the valley in the balancing process, the supply side needs only to determine relatively stable supply according to a power supply load demand in the low-tension transformer area, the system runs stably, 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 + / -10%, approximately linear power load smooth operation is realized, the power generating set is prevented from idle running, and safe, economic and smooth operation of the power grid is ensured.

Description

technical field [0001] The invention relates to an intelligent technology for power supply in a station area, in particular to an intelligent management method for peak-valley load balance in a low-voltage station area. 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 is a sy...

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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 power plants are mostly pumped storage power plants in reality. Pumped storage power plants use the electric energy when the power load is low to pump water to the upper reservoir, and then release water to the lower reservoir for power generation during the peak power load period. It can reduce the power grid load. It is also suitable for frequency modulation and phase modulation to stabilize the cycle and voltage of the power system, and it is suitable for emergency backup. It can also improve the efficiency of thermal power plants and nuclear power plants in the system, but pumping water The construction period of the energy storage power station is long, the site requirements are high, it is difficult to promote in a large area, and the pumped storage power station will cause a large amount of energy loss during the energy conversion process;

[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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