Automation has become an integral part in power sector thanks to the growing concern about enhancing plant performance through dependable and predictable operations. Power plant automation solutions help in automating turbine control, boiler control, boiler protection, the balance of the plant, and integration of third-party systems with the help of predictive maintenance and connectivity through the Internet.

Digitalisation is growing rapidly across the world and devices are becoming increasingly intelligent. In power sector, standardised protocols for substation or Internet of Things (IoT) is bringing uniformity across the devices and equipment. The interoperability and data readability are the key solutions with the advent of IoT. Also, with the emergence of Cloud based automation solutions, power companies are benefited with reduction in costs, functionality enhancement, and greater flexibility.

Within the Power Portfolio of TAS the following are possible areas of engagement where we can provide our dedicated services.

Advanced Metering Infrastructure

Advanced Metering Infrastructure (AMI) is an integrated system of smart meters, communications networks, and data management systems that enables two-way communication between utilities and customer premises equipment. With the advent of an Advanced Metering Infrastructure (AMI), both consumers and the utilities would benefit.

The consumers would be able to:

  1. View their consumption of electricity accurately on a regular basis
  2. Manage loads in different manners based on the design, ranging from remotely turning

ON/OFF their appliances to managing total demand to allow curtailed supply instead of load shedding

  1. Save money from Time of Use (ToU) tariffs by shifting non-priority loads
  2. Face reduced outages and downtimes, and even lower or zero load-shedding

Utilities would benefit in the following ways (which would pass on to the consumer)

  1. Financial gains by
  2. Managing the load curve by introducing Time of Use (ToU)/Time of Day (ToD) tariff, demand response etc.
  1. Reducing equipment failure rates and maintenance costs
  2. Enabling faster restoration of electricity service after fault/events
  1. Detecting energy theft/pilferage on near real-time basis
  2. Streamlining the billing process
  3. Remote meter reading which reduces human resources, human errors and time consumption for meter reads
  1. Respond to power outages and detect meter failures (with no on-site meter reading)
  2. Enhanced monitoring of the system resources that would significantly improve the reliability indices like CAIDI, CAIFI, SAIDI, SAIFI etc.

  1. Improvement in other key performance indicators

Utilities have millions of consumers and hence millions of meters to record the electricity usage of each consumer. IPv6, with its ‘virtually limitless’ address space, can provide IP addresses to each and every energy meter and thus assists in making every meter reachable, accessible and controllable from a remote central location. The second aspect is security. Since security is an integral part of IPv6, enhanced protection can be implemented in an end-to-end network.

Supervisory Control and Data Acquisition (SCADA)

SCADA (Supervisory Control and Data Acquisition) is a system for acquiring and analyzing information obtained from numerous devices placed on the electrical grid. In addition, various grid elements can be controlled using SCADA.

Apart from measuring voltage, current, active power, reactive power, power factor, etc., our SCADA solution enables acquiring the status of switches, protection relays and faults of Feeder Terminal Unit (FTU) as well. Flow detection and momentary voltage drop measurement can also be achieved. On the other hand, switches and relays can be controlled from the control center.

Typically, a Remote Terminal Unit (RTU) serves as an intermediate entity between the control center and Intelligent Electronic Devices (IEDs) on the grid. The communication requirements for SCADA are very stringent. These include (but are not limited to) extremely high availability, reliability and information security, along with very low latency.

Our SCADA solution can be used both, at the distribution level (SCADA/DMS) and at the transmission level (SCADA/EMS). SCADA/DMS is operated by the distribution companies (DISCOMS) for low voltage distribution lines. SCADA/EMS is operated by the transmission companies (TRANSCOS) for high voltage transmission lines.

*DMS: Distribution Management System

*EMS: Energy Management System

Wide Area Monitoring System (WAMS)

Wide Area Monitoring System (WAMS) is used to obtain both, magnitude and phase of the voltages and currents using Phasor Measurement Units (PMUs). The reading is time synchronized using Global Positioning System (GPS).

Real time situational awareness is achieved by using WAMS via voltage stability assessment, state estimation, oscillation detection and post-fault analysis.

Substation Automation and Distributed Automation

Apart from transforming the voltage levels, modern substations can be equipped with ‘smart’ devices for monitoring and controlling the operation of transformers, circuit breakers, protective relays, capacitor banks, switches, voltage regulators, static VAR compensators, etc.

Substation automation and distribution automation, being critical for the functioning of a utility, impose stringent communications requirements of availability, reliability, latency and security. Distribution automation involves employing automation elements at various places on the electricity grid such as Ring Main Units (RMUs), distribution transformers, reclosers etc. This centralized monitoring and control of the distribution networks improves the reliability and efficiency of the electrical network.

Currently in India, IEC 60870-5-104 protocol is widely used for substation automation.

Distributed Generation Manager

Distributed generation refers to the generation of electricity by using small scale technologies very close to the end user. Examples of distributed generation using renewables include solar, small hydro, wind, biogas and hydrogen energy. Non-renewable fuels such as diesel, natural gas and kerosene are also used for distributed generation of electricity.

Distributed generation of electricity would not only reduce the demand supply gap, but would also enable consumers in becoming ‘prosumers’ wherein they would feed electricity into the grid and generate revenue.

The renewable resources that are used for distributed generation in India are small hydro, solar, water pumping windmills, aero-generators, wind-solar hybrid generators and biogas. Small hydro is by far the dominant technology contributing to distributed generation. It is the most mature of all the technologies followed by solar and biogas. Water pumping windmills along with aero-generators and wind-solar hybrid generators are relatively new technologies that implement distributed generation.

Distributed Generation Manager communicates the amount of electricity generated in real-time to the control center, Remote Asset Monitoring and Energy Generation Controller are also part of the Distributed Generation Manager solution, which manages the power generation node as per the needs of the utility.

Electric Vehicles

India has launched the National Mission for Electric Mobility (NMEM) for expediting the adoption and manufacturing of electric and hybrid vehicles in India. To achieve this objective, a National Electric Mobility Mission Plan 2020 was released in 2012 which lays the vision and provides a roadmap for achieving significant penetration of these efficient and eco-friendly vehicles in India by 2020. It aims to transform India as a leader in the two-wheeler and four-wheeler market (encompassing electric and hybrid vehicles) with anticipated sales of around 6-7 million units by 2020.

M2M communications are vital for the functioning of the electric vehicle charging infrastructure because information regarding charging of the electric vehicle needs to be sent to the utility for billing purposes. Hence choosing a reliable and secure communications technology is a necessary requirement for the electric vehicle charging infrastructure, and that is where the ASSET Monitoring, Energy Monitoring and other M2M communication solutions of TAS plays a vital role in delivering reliable, precise and secure outcomes.

Energy Storage

Renewable energy generation being intermittent and variable, requires energy storage technologies for viable operation. Storage facilities not only store electricity during non-peak hours and provide power during outages, but also provide low cost ancillary services such as ‘Load Following’ and ‘Spinning Reserves’.

M2M communications, both at the supply side and the demand side, provide the necessary visibility in the grid by being able to monitor and control the amount of electricity storage in near real time.

With India aggressively increasing renewable generation capacity and prevent lost cost; efficient energy storage technologies along with reliable M2M communications, provide further stimulus to achieve the target.

Microgrid Master Controller

A microgrid is a local grid with an integrated energy system that intelligently manages the interconnected loads and distributed energy resources. The generation and distribution of power can be operated in island mode or grid connected mode.

Microgrids can customize the local energy demand curve for an area by integrating conventional power supply with locally installed distributed generation viz. solar, wind, biomass, waste to energy etc. Thus, they reduce load on main grid, encourage distributed power generation, allow for islanding from main grid which in turn lead to grid independence and offer a reliable and un-interrupted source of energy to the users connected to the microgrid.

The driving factors of microgrids include (but are not limited to) efficiency, reliability, energy security, economic savings, revenue generation and sustainability. The primary components of a microgrid are a Master Controller, AMI, Distributed Energy Resource and Energy Storage. Among these, TAS offers a highly efficient Master Controller which matches the load with generation by optimising the integration, dispatching and control of distributed energy resources and loads.

Home Energy Management/Building Energy Management

Smart homes offer monitoring and control of the electricity usage within the consumer premises. Aggregators or energy management systems form the core of home automation by providing a means to efficiently consume electricity. In addition to a smart meter that remotely connects and disconnects the supply, smart appliances provide the energy consumption data to the consumer and the utility. The consumer can view the consumption data via an In-Home Display (IHD) device or via SMS, e-mail or by logging on to a consumer portal. Load can also be remotely controlled via the aggregators or energy management systems.

National Optic Fiber Network

The Government of India is in the process of connecting 250,000 gram panchayats on a fiber network. There is a plan to connect all 33KV and above substations using optical fiber to create a backbone network for the power sector.

Integrated Power Development Scheme (IPDS) and Deen Dayal Upadhyaya Gram Jyoti Yojana (DDUGJY) were launched by the Government of India in November 2014 to reform the power sector.

The services that TAS can offer under IPDS to strengthen sub-transmission and distribution network, are metering of distribution transformers/feeders/consumers and IT enablement of distribution sector in urban areas, separation of agricultural and non-agricultural feeders, strengthening and augmentation of sub transmission and distribution infrastructure in rural areas including metering of distribution transformers/feeders/consumers.

To know more about the solutions offered by TAS India Pvt. Ltd., to deliver control, management and monitoring services for Power plant, download the case study provided below.

- Enovathemes