System Introduction

Solar power is now accepted as part of the electricity production cycle as much as coal or nuclear power but is a much cleaner source. At the same time, the usage of electricity is growing every year and with the arrival of electric cars usage will be even bigger. Yet in most countries there is an imbalance on the country grids. Too much power at some times, not enough at others.
To help grids overcome the usage spikes which occur every day, battery storage is the answer.
Battery technology has made great strides and made storage a viable proposition, both for national grids and companies and both parties are embracing this exciting new sector.
Dowell provides 1st class EPC services for Battery Energy Storage Systems.
Dowell has 10 years’ experience in this field providing systems to store, to monitor and to distribute power. They are one of the leading storage EPC companies with great success in China. Now they can bring this wealth of experience to your project.



System Features

  • On-Grid and Stand-Alone Running Mode

    This is the essential difference between smart microgrid and charged distributed generation system. Smart microgird run under on-grid mode has peak load shifting effects on large power grid. When power grid fault occurs, smart microgrid can split large power rapidly, island running. Provide continuous power for important load such as government, hospitals, traffic hub and improve reliability of power supply.
  • Stability

    When microgrid run individually, can balance power and make voltage and frequency steady under steady state and transient state, effectively solve problems of voltage and harmonic wave. Avoid immediate influence on electric energy for around users by intermittent power.
  • Compatibility

    Microgird is the most effective method to realize distributed generation grid-connected, which integrates original scattered distribution renewable resources. Through energy storage devices and control protective devices can realize smooth power fluctuation, ensure supply and demand balance and system steady. It can overcome disadvantages of distributed generation, randomness and intermittent, solve distributed generation access problems.
  • Flexibility

    Microgrid can be regarded as a controlled unit of large power grid, realize distributed generation “plug and play”. According with users’ requirements can provide electric energy with different prices and various classes to meet users’ multifarious requires.
  • Power System Optimization Solution

      Energy Transfer Application

    Mode 1

    It is suitable for large-scale photovoltaic power plants, serious power limit scene, application with the power grid access conditions and enough space for system installation.
    Characteristic advantage:

    1. AC bus connection, suitable for centralized management.
    2. No more use solar, no more use wind, highly enhance the economy, improve the economy.
    3. tracking scheduling, improve the on-grid controllability.
    4. to improve the prediction accuracy of power generation, and promote on-grid friendly.
    5. Application scheme for centralized storage system structure diagram.


    Mode 2

    Suitable for small and medium scale of photovoltaic power plants, the area with serious power limit generation scenarios, and the area without access to grid as well as no large grid installation site.
    Characteristic advantage:

    1. DC bus connection, modular design, flexible configuration.
    2. storage system does not need additional on-grid requirements and save step-up transformer.
    3. No more use solar, no more use wind, highly enhance the economy.
    4. peak valley price, improve system revenue.

      Micro Grid Application

    Mode 1

    It suitable for non-power, islands and other independent grid areas, multi energy complementary, spontaneous and self-use and scattered areas of photovoltaic installation.
    Characteristic advantage:

    1. High efficiency ,flexible; suitable for multi renewable energy system.
    2. AC bus connection for centralized management.
    3. Wide radius, easy expansion, suitable for long-distance transmission.

    Mode 2

    Suitable for small and medium scale of photovoltaic power plants, the area with serious power limit generation scenarios, and the area without access to grid as well as no large grid installation site.
    Characteristic advantage:

    1. DC bus connection, modular design, flexible configuration.
    2. storage system does not need additional on-grid requirements and save step-up transformer.
    3. No more use solar, no more use wind, highly enhance the economy.
    4. peak valley price, improve system revenue.

      Power Frequency Modulation Application

    It can meet the requirements of the first frequency of the grid to respond quickly to the Scene, to respond to short-cycle load power changes; with the generator, it can make secondary frequency scene; to assist traditional power systems and AGC equipment.
    Characteristic advantage:

    1. It can achieve the first and secondary frequency Modulation.
    2. Effectively improve the grid frequency stability.
    3. With fast dynamic response speed.


    Cases

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