Power Industry New Engine: Distributed Power Supply

On July 9, 2013, the roof project of Hangzhou East Railway Station was connected to the grid to become a new engine for the power industry, again setting off an investment boom in China's distributed power supply.

First, the prominent function of distributed power

Distributed power supply refers to a power supply with a voltage rating of 35KV or less that is not directly connected to a centralized power transmission system. It mainly includes power generation equipment and energy storage devices. Distributed energy systems do not simply adopt traditional power generation technologies, but are based on new technologies such as automatic control systems, advanced materials technologies, and flexible manufacturing processes. They have low pollution emissions, are flexible and convenient, and have high reliability. High-efficiency new energy production system.

Second, the large-scale expansion of distributed power

According to the data monitoring conducted by this station's industry research institute, since the beginning of 2013, the State Grid has accepted 604 press-fitting businesses related to distributed power grid connection, with a power generation capacity of 1,090,400 kilowatts, including 585 photovoltaics, with a power generation capacity of 1,152,100 kilowatts; Comprehensive utilization of 8 households, generating capacity of 27,100 kilowatts; biomass 4 households, generating capacity of 11,200 kilowatts; wind and light complementary 2 households, generating capacity of 13.5 kilowatts; Chaoshan 2 households, 1500 kilowatts; natural gas 2 households, generating capacity of 5,489 kilowatts; wind power 1 Households, 3000 kilowatts.

At the same time, the distributed power grid-connected business mainly focuses on self-use of self-powered Internet access, accounting for more than 50% of the total reported business. There are 71 households with full access to the Internet, generating capacity of 163,700 kilowatts: 151 households with 331,500 kilowatts for their own use, 379 households with self-use electricity, 704,400 kilowatts, and 3 households with 7,000 kilowatts.

Third, the development environment of distributed power supply is increasingly perfect

As a typical policy-oriented industry, distributed power supply, its development is highly dependent on the policies of countries and regions. Comprehensive analysis, at this stage of the distributed power supply country and regional policy environment, this station believes that China's distributed power supply development environment is increasingly perfect.

The analysis of the development environment of the distributed power supply in the “Report on the Forward-looking and Investment Strategic Planning of China's Distributed Energy Industry Market for 2012-2016” by the Industrial Development Research Institute of the Station is as follows:

(1) National level 1. Promulgation of relevant policies The State Grid has issued a series of policies, such as the Opinions on the Implementation of Distributed Photovoltaic Generation Grid-connected Services and the Opinions on the Implementation of Distributed Power Supply Integration Services, with a view to promoting our country. Distributed power supply security and healthy development.

2. Establishing a standard system National Grid In order to ensure the reliable grid-connected distributed power supply and the safe and stable operation of the power system after large-scale access, vigorously promote the construction of a distributed power grid-connected standard system. The company has successively compiled 8 national standards, 8 The industry standards and 16 enterprise standards have solved the outstanding problem of the delay in the construction of distributed power standards in China.

3. Increased R&D of the National Grid The cumulative investment of the national grid was 1 billion yuan, and a world-class distributed power grid digital simulation platform was built. In the distributed power supply analysis modelling, planning and design, operation control, power forecasting, and grid elimination We carried out research on many aspects such as nanotechnology and focused on solving the key technologies that restrict distributed power supply, as well as the coordination operation and control of reliability devices and distributed power sources such as reclosing, self-provisioning, and hand-in-hand.

4. Establish a demonstration project The national power grid has established major demonstration projects one after another to improve the construction operation and management level. For example, the Shanghai World Expo Park Smart Grid Demonstration Project and the Tianjin Eco-City Smart Grid Integrated Demonstration Project with photovoltaic power generation and distributed power supply as main contents have accumulated experiences and technologies for the development and utilization of various new energy sources and distributed power generation in China. basis.

(II) At the regional level, under the guidance of relevant national policies, various regions across the country have responded, among which Fujian and Jiangsu are the most typical.

Fujian Fuzhou Electric Power Bureau built two model projects in Junmen Community and Zhongcheng Mingshihui Community to publicize and promote the concept of green environmental protection. As of July 2013, Fujian Province already has six photovoltaic power generation projects such as Xiamen Sanyang Optoelectronics and one individual photovoltaic power generation project connected to the grid for power generation, with a total installed capacity of 0.46 million kilowatts; 13 distributed photovoltaic power generation projects under construction in the province The total installed capacity reached 55,400 kilowatts. In February 2013, Fuzhou Zhenyuan Science and Technology Development Co., Ltd. built the first unit of Fuzhou's self-built distributed photovoltaic power generation system and connected it to the grid. By May 7, the cumulative power generated was 5566 kWh, of which 1112 was sold online to the power supply department. Kilowatt hours.

Stimulated by favorable policies, distributed PV in Jiangsu is showing a vigorous development trend. As of July 2013, the province has accepted 96 applications for grid-connected applications, with a total installed capacity of 208,900 kilowatts. Among them, there are 32 residential projects with a total installed capacity of 189.08 kilowatts; 64 non-residential projects with an installed capacity of 208,700 kilowatts. The province has formally grid-connected distributed power projects with 9 total generating capacity of 22,200 kilowatts.

The Research Station of Distributed Energy of the Industrial Development Research Institute of the Station believes that at this stage, distributed generation is at an early stage of development, and there are still many hidden problems. Therefore, this site reminds the relevant units, companies, and supporting organizations that, even under the decentralization of new energy approval authority, it is necessary to rationally plan distributed power grid-connected projects based on the specific conditions of the power grid, and it is not possible to blindly move forward.