In 2016, according to the request of “Skolkovo Institute of Science and Technology”, the company developed and manufactured a SMARTGRID stand designed to study the operation modes of generation (both basic and randomly changing), consumers, with or without the influence of the energy storage device. Using the network matrix, the influence of power lines and some emergency modes are modeled.
The stand is located in the Skolkovo Energy Systems Center.
THE STAND PURPOSE
- investigation of the effect of distributed generation of electricity on the network;
- imitation of steady and dynamic modes of three-phase networks;
- modeling of dynamic characteristics while Smartgrid network is connected to the power system and while working autonomously, both in symmetric and asymmetrical conditions;
- network and consumer management, measurement of network parameters;
- study of the influence and advantages of power storage systems.
THE STAND POSSIBILITIES
- presentation and research of various methods of control in the energy sector, such as strategies for limiting peak loads to improve the reliability and quality of electricity in the network;
- simulation of various types of energy storage devices connected to the network;
- research of network stability for increasing reliability;
- estimation of the energy flow between different points of the network using a network matrix with a transmission line impendence;
- testing of any kinds of new devices such as renewable energy generators, various types of energy storage systems;
- creation of different load profiles and generation of electric power for testing the network layout of remote microdistricts in the isolated system mode;
- estimation of the energy savings using Smartgrid connected to the main network.
THE STAND BLOCK-DIAGRAM
THE NETWORKS MATRIX
- connects to the four joints of the Smartgrid system (substations);
- measures the energy flow and voltage at each point in order to monitor the network parameters.
THE POWER STORAGE
It consists of 3-phase bi-directional inverters, which can both charge and discharge power storage devices (accumulators).
- Li-ion batteries as an energy source
- Supercapacitor for peak consumption.
- imitate other types of energy storage devices, simulating the dynamics of the inverter and the charging process;
- analyze and test various types of energy management strategies (peak load limitation, frequency regulation).
THE WIND AND SOLAR GENERATION
The wind and solar generators consist of 3-phase inverters, which allow:
- emulate any generation profile using a wind turbine or a virtual solar panel;
- connect a wind generator and a real solar panel to operate the network in normal mode.
With the help of storage, buffer water tanks, a short-term (0.5-1 min.) mode of the pumped storage station is simulated.
75% of the energy of the pumps is taken from the independent external network and 25% from the Smartgrid (separate pumping units).
THE DIESEL GENERATION
Provides backup power in the case of a storage system discharge.
It consists of 3 – phase inverters connected to a diesel generator.
THE ACTIVE AND REACTIVE PROGRAMMABLE LOADS
They consist of two 3-phase programmable LR-circuits, which allow emulating any active or reactive load from industrial facilities or residential sector.
The load profile can be specified from the very beginning of the experiment or can be changed in real time.
Energy consumption can also be changed by the energy management unit to test the smart load, which increases consumption if renewable energy sources are available.