In 2022, the National Development and Reform Commission and the National Energy Administration jointly issued the Guiding Opinions on Accelerating the construction of a Unified National Electricity Market System, pointing out that accelerating the construction of a unified national electricity market system is a necessary means to promote the green and low-carbon transformation of energy and achieve carbon peaking and carbon neutrality. The electricity market mechanism can promote the whole society to share the cost of energy transformation and the fruits of green development, which is a strong guarantee to achieve the goal of carbon peaking and carbon neutrality as scheduled.

In the past year, according to data from the National Energy Administration, the national installed capacity of renewable energy has historically exceeded 1 billion kilowatts, and the installed capacity of hydropower, wind power and photovoltaics has exceeded 300 million kilowatts, and the installed capacity of offshore wind power has jumped to the first place in the world. , the renewable energy power generation amounted to 2.48 trillion kWh, accounting for 29.8% of the total electricity consumption of the whole society, and the annual power generation of new energy exceeded the 1 trillion kWh mark for the first time.

However, due to the low simultaneous rate of new energy generation and load, a high proportion of new energy access means that the wind and light abandonment rate is bound to be increased. The problem of "abandoning wind and light" first appeared in 2010, when new energy entered the stage of large-scale development and grid-connected installed capacity increased rapidly. However, due to the intermittency, volatility and randomness of new energy, traditional power grid construction and consumption mechanism lagged behind, and "abandoning wind and light" began to appear, and peaked around 2016. The main contradiction in the development of new energy has gradually turned into a problem of systematic absorption.

The "14th Five-Year Plan" period is a critical period and a window period for carbon peaking. New energy will usher in a larger-scale and higher-speed development, and the pressure on consumption and utilization will continue to increase. It is estimated that in 2025, the national new energy grid-connected installed capacity will reach about 1.05 billion kilowatts, and the new energy will maintain a rapid growth of about 100 million kilowatts per year, and the scale will reach 1.4 times that of the "13th Five-Year Plan" period. At the same time, during the "14th Five-Year Plan" period, the proportion of new energy newly added power generation in the total new power generation will rapidly increase from 25% during the "13th Five-Year Plan" period to 45%. On the whole, the difficulty of new energy consumption and utilization during the "14th Five-Year Plan" will increase significantly.

Therefore, held on July 28, 2022, it is pointed out in conference of the Political Bureau of the CPC Central Committee, improving the capacity of energy supply security, given to put more effort into planning and construction of new energy supply system, the size and the given level is flanks in the development of new energy, high quality, the current rapid rising of new energy capacity, but also have to solve the problem of good given, Otherwise, the more severe "wind abandoning light" phenomenon may rebound again, affecting energy security and the "double carbon" process.

If the problem of "abandoning wind and abandoning light" is not solved, it will be difficult for new energy to develop comprehensively and rapidly.After years of research and development and innovation, suntrans™ using core technology products, can build up the "intelligence control demand side response (ADR) + virtual power plant", realize the micro grid and large power grid stability "dual mode operation system, in order to change the power supply and demand structure, effectively promote the local given, reduce" abandon the abandoned light "problems with effective solutions.

"Supply side" in the original power capacity invariable situation, the client, which is the "demand side" by digital intelligent control technology, the implementation of orderly power mode, namely the removal of some minor electrical equipment, control a certain size proportion of electricity guarantee the stable operation of the main electrical equipment, this is the scale of virtual power plant energy demand side deployment.

Wuhan University is one of the proficient application cases of large-scale virtual power plant deployment of demand-side energy. At present, more than 10,000 student apartments have achieved ADR. One (each) air conditioner (about 1.5 hp, 1.2 kW) is turned off at peak times, and 12 MW of electricity is freed up at one time, which is equivalent to 1/4 of the school's electricity consumption. During the peak period of urban electricity consumption, it is ensured that the school’s electricity consumption will not exceed the power supply quota when other electrical appliances are available in the student apartment, which provides a guarantee for the electricity consumption for teaching and research. It has been successfully operated for 7 years and has achieved significant benefits.

The dual mode operation of ADR+VPP can effectively promote local consumption. When the new energy is sufficient, the power supply mode can be switched from the large power grid to the micro-grid mode of the new power supply through suntrans™  patented dual-power supply UPS intelligent switching device for local consumption of green power. When the new energy power fluctuates, the device will be regulated to the large grid operation mode, and the "intelligent control demand-side response" technology will be used to ensure the safe and stable operation of the main body of electrical equipment.

The dual power supply UPS intelligent switching device is a revolutionary power level UPS. It adopts the AC zero-crossing technology, which is 100 times longer than the traditional ATS electrical working life; it can realize high-speed non-inductive switching, and the speed can reach 22Hz to ensure the continuity of electricity consumption; It has the functions of flexible load management and control and the prediction, early warning and forecasting of abnormal electricity consumption, and realizes the online dynamic management and control of the whole life cycle load through the "cloud".

Typical case: Application of a railway electrical system with the highest reliability requirement. In January 2021, a railway group company decided to apply suntrans™ dual-power intelligent switching device to implement large grid + micro grid dual-mode operation mode in two stations to locally absorb renewable resources and promote the development of near-zero carbon power system.

(Schematic diagram of temporary installation of field equipment)

During this period, suntrans™ industrial Internet of Things platform and "Railway Cloud" internal echo, the construction of the "embedded intelligent dual power controller" of the massive data quickly collected and established analysis, decision-making, control system, can synchronously complete the decision of thousands of miles away from the Internet of things energy control system. To ensure more secure, more reliable and more accurate mass targets, mass tasks synchronous collaborative management and control, efficiently complete the intelligent regulation of mains and green power, improve the utilization efficiency of renewable energy.

(Dual power supply intelligent safety switching system diagram)

ADR+VPP is the basis for the distributed consumption of all kinds of local green energy, realizing the efficient utilization of green energy, and the basis for the construction of a new low-carbon power system with the support of large power grid platform and the flowering of micro-grid everywhere. It is also the key to realize the benign energy storage architecture with equal supply and demand balance of "the greater the power load, the more the power storage". 

If, before 2030, more than 30% of the power load on the national energy demand side reaches the level of the "intelligently controlled demand side response (ADR)" smart microgrid, the ability to directly absorb unstable and clean energy can be increased to more than 40%. This will change the current power and energy supply structure, thereby reducing the dependence on thermal power generation and providing a strong guarantee for the realization of the dual carbon goal.