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The Unity for Solar system, as an advanced monitoring, centralized platform consists of the following two main components, the solar plant subsystem and the Unity control center:

a)The solar plant subsystem is composed of all the peripheral monitoring and supervising systems constituting of materials and devices including controllers, sensors, and measuring instruments, which are installed at the solar plant in order to monitor, supervise and control the Site infrastructure elements.

b) The Unity control center includes the necessary hardware and software elements for managing all the Solar plant Subsystems located at the solar plants.

 

  1. Solar plant substation hardware

 

Main Substation Unit – MSSU

Highlights

 

  • It is the heart of the Solar plant subsystem, which is installed in the main substation
  • It is connected to a variety of equipment that measures, monitors and controls any desired parameter to networked intelligent devices as well as various sensors and actuators.
  • It gathers all necessary data, pre-process and forward the results over a network connection to the centralized ControlCenter servers.
  • If needed, the MSSU may also undertake tasks relevant to the handling of the IP connection
  • Integration with alarm system to collect security events
  • A modular system built around a CPU unit and various I/O units
    • The CPU unit is a single-board industrial computer based on a x86 processor, clocked at 1.1 GHz
    • A number of I/O units are available for the MSSU offering dedicated connectors to terminate I/O channels from the plant.
    • Interfaces include analogue inputs & outputs, digital inputs & outputs, pulse inputs, serial and ethernet interfaces

 

 

 

Peripheral Substation Unit – PSSU

Highlights

 

  • A PSSU is optionally installed in each peripheral substation or inverter skid to extend the monitored signals
  • Just like MSSU, a PSSU can be connected to a variety of measuring, monitoring and controlling equipment as well as various sensors and actuators.
  • Together with the MSSU, the PSSU gathers all necessary data, pre-process and forwards the results over the network connection to the centralized ControlCenter.
  • A modular system built around the same CPU unit as the MSSU and various I/O units.
    • The CPU unit is a single-board industrial computer based on a x86 processor, clocked at 1.1 GHz
    • A number of I/O units are available for the PSSU offering dedicated connectors to terminate I/O channels from the plant.
    • Interfaces include analogue inputs & outputs, digital inputs & outputs, pulse inputs, serial and ethernet interfaces

 

 

  1. Unity Control center (hardware and software)

 

Highlights (hardware)

 

  • A centralized system that monitors and controls every Unity for solar local substation unit.
  • In the Unity control center, the calculation of relevant key performance indicators for each plant according to international standards is performed.
  • Data are collected in a CloudDatabaseCenter (or dedicated database centers according to client’s need) from which the stakeholders can use data accordingly for future analysis and performance tracking. Each PV plant can be monitored on cloud server via web browser or mobile devices.

 

Highlights (software)

  • The Unity Control Center software consists of a database, a synchronizer, a business logic unit, a notification server and a front-end unit.
  • The database stores all data necessary for the operation of the solution in a centralized manner for all monitored sites.
  • The synchronizer manages all IP connections with the field-deployed controllers, collects data from them either periodically or event-driven and relays any user action events from the front-end to the field-deployed controllers.
  • Business logic performs data processing to produce statistics, performance ratios, reports and alarms.
  • Notification server notifies selected users via email/SMS in case of critical alarms.
  • The front-end unit undertakes the structured presentation of the data to a multitude of users using web technologies integrating video feeds from the CCTV system for specific DVRs

 

 

 

Features of Unity for Solar platform

  • Detailed cross plant event information
    • effective remote monitoring to ease maintenance
  • Cross Plant Data and Comparisons
    • compare plants and find problematic ones
  • Performance Ratio according to IEC61724 with accurate data
    • Pin-point problems with a solar plant performance
    • Evaluate the actual performance of the plant
  • Yields & losses
    • Find problems in the DC or AC part of the plants
    • Correlate yields with losses and draw valuable conclusion
  • Efficiencies
    • Evaluate suppliers and products
  • Easy comparisons and recognition of under-performance spots
    • By comparing strings or inverters, one can easily find under-performing components
  • Electrical installation & power flow monitoring
    • Check grid status and stability
  • Historical alarms and events
    • Investigate the root-cause of problems
    • Find repeating problems and solve them
  • Email & SMS notifications
    • For immediate intervention in case of problems
  • Design optimization data
    • Validate system design
    • Optimize inverter choice & sizing
    • Optimize array efficiency

 

 

Benefits of Unity for Solar platform

  • Modular & extensible architecture
    • Well-designed interfaces based on Web technologies
    • Easy to add new services and information elements
  • Scalable & highly available IT architecture
  • Intelligent monitoring
    • All major solar-plant related KPIs are supported by design
  • Truly centralized solution
    • Not just a remote login
    • Consolidates data from multiple sites
  • It is NOT a generic SCADA platform
    • Designed to fit remote sites monitoring / control needs
  • Web-based, accessible from anywhere, anytime
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