CN102097820A

CN102097820A - Solar peak and valley power regulating system

Info

Publication number: CN102097820A
Application number: CN2010101908006A
Authority: CN
Inventors: 李晟; 王北宁; 易昂; 王卫; 谢小林
Original assignee: Zhuhai Singyes Renewable Energy Technology Co Ltd
Current assignee: Zhuhai Singyes Renewable Energy Technology Co Ltd
Priority date: 2010-05-28
Filing date: 2010-05-28
Publication date: 2011-06-15

Abstract

The invention provides a solar peak and valley power regulating system which is applied to development and utilization of renewable energy sources. The solar peak and valley power regulating system comprises a solar photovoltaic grid-connected generation system, a multi-way inverter, an energy storage system and unloading equipment. By detecting whether the terminal voltage of a public supply network is higher or lower, the excess energy on the public supply network can be used for charging the energy storage system, or the solar photovoltaic grid-connected generation system is used for supplying power to the public supply network. When the generation power of the solar photovoltaic grid-connected generation system is greater than the required power of the public supply network, the excess energy can be stored in the energy storage equipment or can be unloaded; and when the generation power of the solar photovoltaic grid-connected generation system is less than the required power of the public supply network, the energy in the energy storage equipment is used as a supplement. In the drawing, part (1) is the solar photovoltaic grid-connected generation system, part (2) is the multi-way inverter, part (3) is the energy storage equipment, part (4) is the public supply network, and part (5) is the unloading equipment.

Description

Solar energy peak valley electric power regulating system

Affiliated technical field

The present invention is applied to the development and utilization of regenerative resource.

Background technology

Along with social economy constantly develops, different regions or different period go up the power consumption ratio great changes have taken place, and are reflected on the power load curve, show as the electrical network peak-valley difference and increase gradually, when peak of power consumption, be subjected to the restriction of power supply supply and electric network transportation ability to cause grid power supply breach; When low power consumption, because load and reactive power compensation deficiency cause the quality of power supply and stabilization of power grids level to descend.

The present major measure that solves the peak load regulation network problem comprises by the power consumption of mode brownout peak periods such as double fee rate electricity price and power cuts to limit consumption and encourages the user in the electricity consumption therebetween of electrical network underload, these measure peak modulation capacities are limited, simultaneously normal productive life order is exerted an influence, can not fundamentally solve the unbalanced power supply problem.

Summary of the invention

At the peak load regulation network problem, the invention provides a kind of solar power generation that utilizes, peak times of power consumption to grid transmission, in the energy storage of low power consumption phase, the device that electric power system is regulated, solar energy peak valley electric power regulating system is made up of four parts such as solar energy grid-connected photovoltaic system, multidirectional inverter, energy-storage system, unloading equipment, and the technical solution adopted for the present invention to solve the technical problems is:

Solar energy grid-connected photovoltaic system can be various multi-form solar power systems such as solar grid-connected power station, BIPV grid-connected system or BAPV grid-connected system.

Multidirectional inverter can control energy multidirectional flowing between public electric wire net, energy-storage system and solar energy grid-connected photovoltaic system.The public electric wire net terminal voltage is higher when detecting, illustrate that public electric wire net is in light condition, this moment, the energy of solar energy grid-connected photovoltaic system preferentially offered energy-storage system, and multidirectional inverter is equivalent to charge controller, utilized on the public electric wire net excess energy that energy-storage system is charged;

When detecting the public electric wire net terminal voltage when on the low side, illustrate that public electric wire net is in heavy condition, this moment, the energy of solar energy grid-connected photovoltaic system preferentially offered public electric wire net, when solar energy grid-connected photovoltaic system generated output during greater than public electric wire net electricity consumption breach, unnecessary energy will deposit energy storage device in, if energy-storage system does not have the space to come power storage yet, in order to keep the stable of public electric wire net, the energy that part is unnecessary uninstalls can to start unloading equipment; When solar energy grid-connected photovoltaic system generated output during less than public electric wire net electricity consumption breach, the energy of enabling in the energy storage device will be as a supplement, multidirectional inverter is equivalent to combining inverter at this moment, energy in solar energy and the energy storage device is delivered to public electric wire net replenish the electricity consumption breach.

Solar energy peak valley electric power regulating system is connected on the end of public electric wire net, can when low power consumption, obtain the energy supplement energy-storage system from public electric wire net, when peak of power consumption, can utilize simultaneously solar photovoltaic generation system and energy storage that public electric wire net is carried out effectively replenishing the pressure when having reduced peak of power consumption on the transmission line.

Description of drawings

Accompanying drawing is the structure principle chart of solar energy peak valley electric power regulating system, and wherein: (1) is solar energy grid-connected photovoltaic system, and (2) are multidirectional inverter, and (3) are energy storage device, and (4) are public electric wire net, and (5) are unloading equipment.

Different from common solar energy grid-connected photovoltaic system, combining inverter in the solar energy grid-connected photovoltaic system (1) is not directly to be connected on the bus of public electric wire net (4), but on the ac bus by multidirectional inverter (2) generation.

Multidirectional inverter (2) is the core component of solar energy peak-trough electricity draught control system, has the high speed processing chip, adopts intelligent algorithm can accurately control the multidirectional of energy and flows.

In fact, solar energy grid-connected photovoltaic system is very unsettled, particularly at cloudy weather, generated output changes very greatly, the effect of energy storage device (3) is exactly peak load shifting, and is stably multidirectional mobile by multidirectional inverter (2) control system energy, from the angle of public electric wire net (4), whole system is exactly a stable energy supply device during peak of power consumption, then is stable load during low power consumption.

Specific embodiments

If have one to use electric unit, every day, power consumption was 1000KWh, peak of power consumption be the morning 8:00 to noon 11:30 and afternoon 13:30 to two periods of 17:00, other not electricity consumption of period, and the BIPV grid-connected system of 150KWp is arranged.Building system according to the following steps:

1, selects a suitable room as machine room, place combining inverter, multidirectional inverter and energy storage device.

2, machine room installation ventilating system or air-conditioning are regulated computer room temperature, and computer room temperature is between 0 ℃ to 45 ℃ all the time.

3, consider with electric unit have full-time electrician that batteries is safeguarded, adopt the liquid feeding lead acid accumulator as energy storage device for saving cost, total capacity is 288KWh, carries out 3 and 40 strings by the storage battery of 12V 200Ah and forms.

4, build the solar energy grid-connected photovoltaic system of 150KWp by relevant criterion, combining inverter is installed in the machine room.

5, select the multidirectional inverter of a 200KVA.

6, connect BIPV grid-connected system, public electric wire net, batteries and multidirectional inverter.

7, the order power turn-on switch of stipulating by multidirectional inverter specification.

Claims

1. solar energy peak valley electric power regulating system, it is characterized in that: solar energy grid-connected photovoltaic system inserts on the ac bus that is produced by multidirectional inverter, multidirectional inverter connects public electric wire net and energy storage device, and control energy is multidirectional flowing between public electric wire net, energy-storage system and solar energy grid-connected photovoltaic system.

2. multidirectional inverter according to claim 1 is characterized in that: have the high speed processing chip, adopt the multidirectional of the accurate control energy of intelligent algorithm to flow.