The direction is wrong, then how to change is in place at most supposed to

"Golden sun project, is the government to support solar power inverter enterprises to vigorously promote a project, and some enterprises get financial aid funds, to use inferior materials for construction, completely contrary to the policy in the first place."

Ye Ming wang told reporters, the new financial "finally appeared to backfire, take project not construction of the project, but turned around and sold to a third party, use relegation components to complete the project, discount on the power again, it's hard to say the real cost is how much."

"If you want in gold when the sun and the housing project acceptance data false user, please don't contact, we cannot accept this service."

Tao secco energy CEO Liu Jianzhou once such outrage at gold sun engineering fraud.

Since 2009, a total of more than 900 projects have been included in the list of subsidies, the central government subsidies on these projects more than 200 one hundred million yuan.

"Toothpaste already from the Treasury's mouth out of this precious renewable energy fund, so be scattering gold sun points distinguishes equal out, and then quietly.

Don't get real doer subsidies, index of speculators to buy and sell", grid tie power inverter Ren Kai senior personage thinks, "is really aware, goes to have thousands of miles."

Photovoltaic power generation is characterized by low energy density, with randomness, the best is to use small, decentralized, distributed development way, the roof power generation on the consumption, spontaneous for private use.

But golden sun project threshold is mw, originally the most of Europe and America's most admired is accord with the characteristics of photovoltaic application has huge potential of distributed small rooftop market completely excluded from the policy subsidies, that in itself is being questioned.

Several joy several sorrow

With the 2013 the ministry of finance is no longer the demonstrative project of new gold sun apply for examination and approval, golden sun project to the final moments of life, now how to complete the project become the urgent matter.

"To see many companies looking for roof, sincerely want to: gold sun stop! In the future all supported by power photovoltaic power station of profitable investment policy, please don't come again."

Liu Jianzhou says plaintively, "gold sun was originally used in photovoltaic demonstration project declaration, is for the sake of the pv-tech application start stage to promote the development of industry, now has become a deformity of the policy, the government is hoping to support enterprise, only to find the component manufacturers were pulled to the deep each other!"

Since golden sun project implementation, in fact, many of the photovoltaic companies involved and as the policy to an abrupt end, to those who once the golden sun as key enterprises of enterprise development, how to recover upfront investment has become the problem had to be taken into account.

"Light" d also didn't do last year project has 55 megawatts, "Yang Yanbo told new financial journalist.

And another is located in hebei photovoltaic enterprise staff said "for golden sun project, what are we to say" before, the enterprise once get order one golden sun.

Germany's Siemens in 1971 invented the so-called "vector control technology

Change only in the past traditional way value of ac dc ac inverter (voltage, current, frequency, quantity) control method, realized the control but also control the phase of the value of a new control thought.

Using coordinate transformation method, the realization of the magnetic field of the stator current components and torque decoupling control, can make the ac motor as dc motor has good performance of speed adjustment.

Over the years, people around the vector control technology to do a lot of work, now a new vector control principle of ac motor speed control has been widely practical application, do it with dc speed control system, even more than, can completely replace the dc speed control system.

In some rolling mills, large blooming mill such fast reversible system, adopted in the early 90 s "pay - pay frequency vector control system, up to now began to adopt" cross - straight - to pay "voltage type inverter vector control system.

Practice has proved that it can completely meet the requirements of production technology, has reached the past performance of the dc speed control system.

(4) PWM technology application

PWM (PulseWidthModulation) pulse width modulation technology.

Since the shutoff device development paved the way for the PWM.

Now almost all of the frequency control devices using this grid tie power inverter .

PWM technology for the control of frequency converter, can improve the output waveform of the inverter, reduce the harmonic loss of the motor, and reduce the torque ripple, and simplify the structure of inverter, speed up the adjustment speed, improve the dynamic response performance of the system.

PWM technology for inverter control, are also used in the control of the rectifier.

PWM rectifier has been developed, it can be used to achieve sinusoidal input current and power grid power factor to 1.

The difference between the concentrated EPS emergency grid tie power inverter and fire emergency lighting

Now high-rise buildings, shopping malls, casinos, etc must be fire emergency lighting, that in the light of the fire emergency lighting or emergency lighting EPS fire power inverter , let us together to compare.

Fire emergency lighting is to point to to guarantee in the event of a fire accident, in the absence of external power inverter, can ensure that the lighting, help light-emitting personnel escape to a kind of power inverter appliances. 

It usually use an external power inverter, when the power switch to using a state. 

At present lies in high-rise buildings, shopping malls, entertainment venues such as personnel intensive place of widely used.

EPS is also called the EPS power converter , EPS emergency power converter, fire emergency power converter, the full name of EmergencyPowerSupply (emergency power converter), is the important for electric power security and fire safety in buildings and adopt a kind of emergency power converter. 

It is mainly composed of input and output unit, a charging module, battery, inverter, monitor, output switching device and other parts.

Widely used in building lighting, road lighting, electric power, industrial and mining enterprises, fire elevator (fire pump) and other fire fighting equipment.

1, emergency lighting power switch time after 2 seconds, there will be a failure, EPS emergency grid tie power inverter and switch time can be up to 0.18 milliseconds, won't appear off electricity situation.

Number 2, fire emergency lighting lamps and lanterns and a lot of, don't have the function of the centralized management, is not convenient to manage, only know whether the lamps and lanterns light the lamps and lanterns is normal, and EPS centralized intelligent management, remote monitoring grid tie power inverter, to monitor the quality of battery internal resistance and so on can, achieve preventable and controllable, low fault rate and easy management.

3, emergency lighting lamps and lanterns or move only commonly, small capacity, generally for 4 ah battery led lamps and lanterns, general life is 1 year, maintenance cost is high.

EPS fire emergency power battery life of general design for 5 to 8 years, host life of 25 years, maintenance costs low.

4, the types of emergency lighting lamps and lanterns of strict requirements, EPS grid tie power inverter of lamps and lanterns is not required.

And EPS grid tie power inverter for fire fighting pumps, etc. In addition to the emergency lighting fire load.

Of course is the advantage of EPS grid tie power inverter emergency lighting lamps and lanterns is incomparable, but in the early period of the EPS power supply input is relatively high.