Optimizing the cost of collecting data from smart meters and methods for improvement of the electricity transmission profile.
Project Manager: Colceriu Claudia-CosminaERA-Learn
Results of the CERA - SG project, 2017-2019 "Cost Efficient Data Collection for Smart Grid and Revenue Assurance” is a project with European funds that ran from January 2017 to March 2019 with partners from MinCom Smart Solutions GmbH Germany, SC AM Project Design & Consulting Bucharest and the Technical University of Pitesti.
To achieve the project objectives 1) Simulation and realization of the experimental model and 2) The realization of the pilot system and the operation with it were made available by Delgaz Grid SA:
- Infrastructure of the rural pilot area, defined in Bacău County by the establishment of three PT1 Tamaşi, PT2 Lapos and PT3 Buciumi PT1 transformer stations, the measuring groups of which are equipped with SMART PLC counters; regarding to the topology of the electrical networks, these have been checked and improved in order to carry out the correct analyzes.
- mobile equipment was installed at each PT (Transformation Post), called concentrators, which were developed in the University of Pitesti's laboratory, with the purpose to locating with high precision low voltage network areas with non-conforming consumption / losses;
- data from both SMART meters and mobile devices were transmitted for data analysis via the En.Ocean and GSM media.
The project partners developed:
- a solution that allows temporary measurements in low voltage distribution networks and the transmission of measured values to a central point system for analysis;
- a central point component (SW) that collect the recorded data / quantities transmitted through the solution referred to in the above paragraph and the recorded data / dimensions from all low-voltage electrical distribution networks connected to the same transformer station;
- a central point component (SW) that evaluates and represents the data collected for the main purpose of identifying the power losses on the low voltage part of the transformer station and the segments in the low voltage distribution networks with high losses.
Data analysis consisted of assessing the quality of collected data (in terms of transmission values and frequency). In order to perform reasonable analyzes, several preliminary calculations were accomplished:
- Calculation of apparent electric energies [kVAh] starting from active power [kWh] and reactive [kVARh] measured by smart meters over successive 15 minute intervals;
- Calculation of apparent power energies [kVARh] for a successive 15-minute time interval in mobile device location nodes based on current measurements made by mobile equipment and actual voltages stored by the nearst smart meters as positioning.
We want to thank the collaborators: Dr. Sorin Bălăuţă, Mr. Marius Iuzic, Mrs Alexandra Adăscăliţei, Mr. Chiriţoi Nicolae, Mr. Chilea Gabriel, Mr. Iacob Petrică, colleagues from CORG Bacău.
CERA – SG Project: Second stage results, 2018 Starting with 2017, S.C. DELGAZ GRID S.A. is engaged in a project financed by European Union funds together with other partners MinCom Smart Solutions, SC AM Project Design & Consulting Bucureşti and the Technical University of Piteşti with the following theme: Optimizing the cost of collecting data from smart meters and methods for improvement of the electricity transmission profile.
S.C. DELGAZ GRID S.A.’ s objective for 2018 was to "Realize the pilot system and test it" in a laboratory and productive environment. Thus, the project aims to produce balances and mini-balances using special mobile equipment designed for this purpose for installation in low-voltage overhead networks without interruption of consumers, load curves transmitted by SMART meters in AMMS and a processing and analysis platform designed within this project.
For the achievement of the objective, the following were carried out:
- The pilot area was delineated by establishing three transformers PT1 Tamaşi, PT2 Lapos and PT3 Buciumi PT1 in the Bacău county, whose measurement units are equipped with SMART PLC meters. SMART PLC meters have configuration capabilities with integration periods in the range of 1 ... 15 minutes for storing the load curves and associated voltages;
- Mobile equipment, called "concentrator", has been installed on the low-voltage side of the transformer substation using Power Line Communications as a data transmission medium. The data received by the concentrator is transmitted via GPRS to S. C. Delgaz Grid S.A.’s AMMS central point. These mobile devices have been developed within this project in the laboratory. The installation does not require interruptions in the power supply of consumers, in order to locate with high precision low voltage network areas with non-conforming consumption/losses;
- An analysis method and a central point platform has been developed, using as a mathematical apparatus balances on each transformer substation and mini-balances for apparent electrical energy recorded/calculated over a synchronous time interval;
- A central point platform has been developed that uses SMART PLC meter readings in the area under consideration, meter readings transmitted monthly to the central platform manager with a periodicity of 15 minutes through the En.Ocean and GSM environments for data analysis.
The project is in full swing and we will report back in 2019 with information for the final phase.
We would like to thank our collaborators: Dr. Sorin Bălăuţă, Mr. Marius Iuzic, Mrs. Alexandra Adăscăliţei, Mr. Chiritoi Nicolae, Mr. Chilea Gabriel, Mr. Iacob Petrică, colleagues from CORG Bacău.
CERA-SG Project: First stage results of 2017 For 2017, the objective of S.C. DELGAZ GRID S.A. was the research and system definition needed to develop and implement the project's results. To this end, the power meters equipping the measurement group are SMART meters with the transmission of registered quantities to a concentrator mounted on low-voltage part of the medium voltage substation using Power Line Communications as a data transmission medium. The data received by the concentrator is transmitted via GPRS to the AMMS central point system of S.C.DELGAZ GRID S.A.
In order to reach the objective, the following have been achieved:
- Selection of 3 medium voltage substations from Bacau County 20 kV / 0,4 kV, which supply mainly household customers through the low-voltage power distribution lines (OHL);
- The GPS coordinates (x, y) for the overhead power networks poles and smart meter mounting locations, the smart meter series, the rated power of the distribution transformers equipping the selected medium-voltage substations were obtained and transmitted to the project partners as well as the assignment of single-phase smart meters to the A / B / C conductors of the twisted (insulated) overhead power networks (OHL);
- The synchronization mode and correction of the current time in smart meters (NTP protocol) was sent to the project partners, so that it can also be used by the mobile devices proposed by the project partners in order to use synchronic measured values;
- Successive interruptions of A, B and C phases were performed on the low-voltage side of the medium voltage substations to determine to which phase of the overhead power network (OHL) the single-phase smart meters are connected;
- For the first time, low-voltage balances with a 15-minute integration time for the distributed active power were performed, using as input data the smart meter records mounted in the three medium voltage substations;
- A weekly status check has been proposed for smart meters mounted to detect cases of meters replaced or mounted at new consumers;
- Smart power meters have been set to store actual voltage curves at 15 minutes.
The purpose of CERA-SG Project is to correlate, for the same time interval the records in the AMMS system with the mobile devices records - which will be located on the low voltage power network (OHL) poles connected to the medium voltage substations proposed for this project - developed by the partners within this project by importing data into a central point-based software dedicated to performing energy balances on certain elements/portions/segments of the low-voltage power supply networks proposed for this project.
- 1. Cost reduction in Smart Grid deployment by using a common data collection infrastructure for the measurement of energy and power flows in the distribution network.
- 2. Further cost reduction by using energy harvesting sensors in transformer stations and distribution networks to minimize the cost of installation in initial deployment and modifications.
- 3. Better revenue collection by new ways of incentivisation to reduce non-technical losses.
- 4. Increase of load shifting potential thanks to the reduction of nontechnical losses.
Measuring power flows in the distribution network becomes more important due to distributed generation and storage. Data can drive prioritization of network investment for robustness as well as input for local grid control to reduce power peaks and the need for network investment. Similar data can be used for excessive loss detection and derivation of measures to reduce losses.
The project will create a cost-efficient blueprint for a hierarchical sensor rollout to substations, transformer stations and distribution nodes (inputs and outputs) to serve both purposes mentioned above. To save cost and reduce installation time, novel approaches of data collection in the distribution network shall be developed and tested.
After identification of high loss areas on the distribution tree, tariff incentives reducing loss shall be designed and implemented.
The project includes several stages of research needed to develop and implement the solution.
- 1. 2016-2017: Research and systems definition
- 2. 2017-2018: Simulation and integration of experimental model
- 3. 2018-2019: Building the pilot and test it
- 4. 2019: Evaluation and final documentation
- MinCom Smart Solutions
- University of Piteşti
- S.C. AM Project Design & Consulting S.R.L.
- S.C. DELGAZ GRID S.A.