What is distributed power? Classification and advantages of distributed
power generation technology. The distributed power system does not simply adopt
traditional power generation technology, but is based on new technologies such
as automatic control systems, advanced material technology, and flexible
manufacturing processes. It has low pollution emissions, flexibility and
convenience, high reliability and Highly efficient new energy production
system.
What is distributed power?
Distributed power supply: refers to an independent power supply with a
power of several kilowatts to 50MW, small modular, and compatible with the
environment. These power supplies are owned by power authorities, power users or
third parties and are used to meet the specific requirements of the power system
and users. Such as peak shaving, supplying power to remote users or commercial
and residential areas, saving investment in power transmission and
transformation, improving power supply reliability, etc.
Construction, installation, and operation of power generation facilities at
or near the user's site that are mainly self-consumption on the user side, with
excess electricity connected to the grid, and balanced regulation of the
distribution network system, or energy comprehensive cascade utilization
multi-generation facilities with power output. Including solar energy, natural
gas, biomass energy, wind energy, geothermal energy, ocean energy, comprehensive
utilization of resources for power generation, etc.
In terms of grid connection, a green channel will be opened for the
connection of distributed power sources to the grid and all preferential
conditions will be provided; for distributed power projects built in users'
internal premises, all the power generated can be online, all for self-use, or
the remaining power for self-use can be online for users to choose. , the user's
insufficient power is provided by the power grid.
In terms of price settlement, when distributed power is connected to the
grid, the electricity on and off the grid is settled separately, and the
electricity price follows relevant national policies. For distributed
photovoltaic power generation and wind power projects, the company provides free
gateway measurement devices and energy meters for power generation measurement,
and does not charge system reserve capacity fees. The power generated by
distributed power sources can be used entirely for self-use or the remaining
power can be put online at the user's choice. The power grid will provide the
user with insufficient power. The on-grid and off-grid electricity are settled
separately, and the electricity price follows relevant national policies.
Advantages of distributed power
(1) Economy: Since distributed power generation is located on the user side
and close to the load center, the construction cost and loss of the power
transmission and distribution network are greatly reduced; at the same time, the
planning and construction period of distributed power generation is short,
investment returns are quick, and investment risks are smaller. ?
(2) Environmental protection: Distributed power generation can make
extensive use of clean renewable energy, reducing the consumption of fossil
energy and the emission of harmful gases. ?
(3) Flexibility: Distributed power generation systems mostly use small and
medium-sized modular equipment with advanced performance, which can be quickly
started and shut down, convenient for maintenance and management, and flexible
in adjustment. Each power source is relatively independent, which can meet the
requirements of peak shaving and valley filling, and power supply to important
users. etc. different needs. ?
(4) Safety: The distributed power generation system has various forms of
power generation, which can reduce the dependence on a single energy source and
alleviate the expansion of the energy crisis to a certain extent; at the same
time, the distributed power generation locations are dispersed and are less
susceptible to unexpected disasters or emergencies. impact, with the potential
to withstand large-scale power outages.
The power generation system that makes up the distributed energy system has
the following characteristics:
① Efficiently utilize the waste energy generated by power generation to
generate heat and electricity;
② On-site renewable energy system;
③Including energy recycling system that uses on-site waste gas, waste heat
and excess pressure difference to generate electricity
Distributed power generation technology classification and advantages
Distributed power generation refers to the configuration of smaller
generating units (generally less than 30MW) at the user site or close to the
power consumption site to meet the needs of specific users, support the economic
operation of the existing distribution network, or satisfy both aspects at the
same time requirements. According to the different primary energy sources used,
distributed power generation can be divided into distributed power generation
technology based on fossil energy, distributed power generation technology based
on renewable energy, and hybrid distributed power generation technology.
Distributed power generation technologies mainly include: photovoltaic
power generation, wind power generation, biomass power generation, gas turbine
and tidal power generation, etc. At present, domestic and foreign development is
mainly focused on the development of photovoltaic power generation and wind
energy power generation. In particular, the technology research and development
and market application of photovoltaic power generation have become relatively
mature.
Compared with the traditional large-scale centralized power generation and
distribution model, distributed power generation technology has the
characteristics of independence, real-time control of the power quality and
performance of the regional power grid, low investment, flexible installation
location, short construction period, and high energy utilization rate. and low
environmental pollution. The specific advantages are as follows:
1. Conducive to improving the distribution network's ability to accept
distributed energy resources;
2. It can effectively improve the utilization rate of distributed renewable
energy and provide corresponding power quality services according to actual
application needs.
3. It can reduce the loss of distribution network and optimize the
operation mode of distribution network;
4. It can ensure the power supply of key loads under power grid failure and
improve the reliability of power supply;
5. Can be used to solve power problems in remote areas, deserts or
islands.
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