TPC plans to build an advanced power distribution management system (ADMS) system from 2020 to 2022. Before the introduction of the island in Taiwan, TPC was the first to introduce an Advanced Distribution Management System (ADMS) and a distribution-level renewable energy management system (DREAMS) in the Kinmen area. With its ability to monitor and analyze various information of the distribution network, it provides dispatchers to optimize the dispatch to reduce the impact of renewable energy grid connection and improve the flexibility of system dispatch.
The construction of DREAMS and ADMS in the Kinmen area will initially be carried out as a research project. The project has completed the on-site hardware installation at the end of December 2019. It is scheduled to complete the related system function verification and go online by the end of 2020. The project content includes the implementation of the IEC61850 communication standard to collect and monitor the power generation information of solar power plants, the trial operation of FTU using IEC61850 communication, the introduction of advanced technologies such as power flow analysis and state estimation, and the integration of intelligent monitoring equipment such as AMI, TTU, fault indicators, and distribution feeder Verification of advanced functions of distribution network management such as automated SCADA, FDIR, load forecasting and renewable energy management. The research results can be used as a reference for the future ADMS system construction in Taiwan.
On the island of Taiwan, from January to August 2019, TPC has held various working meetings of the project to discuss functional requirements and handle ADMS public request information (RFI), and has completed technical specifications and is preparing to bid and build.
SCADA/ADMS can be implemented in phases, starting from Database reconciliation to basic system implementation, subsequently extending it to DMS application integration, OMS & Mobile switching. The following subsections detailed the various phases of implementation.
The first step is to conduct database reconciliation studies & implementation. In the envisioned end-state of SCADA/ADMS operation, data will be separately input by respective districts. Data will pass through an adaptor whereby they will be aggregated and reconciled prior to importation into the SCADA/ADMS system. Further studies must be conducted to determine how data can be reconciled (e.g. overlapping asset information, duplicating assets at bordering districts). Once reconciliation is achieved, a data adaptor can be developed as indicated in DM.3 CIM Profiling and Implementation.
As DMMS will serve as the future data source, the quality and maturity of the DMMS database must be thoroughly checked. DMMS must have sufficient quality data to support distribution power flow and state estimation in the future SCADA/ADMS system. Thus, it will be extremely important to carry out data maturity and quality checks as indicated in DM.2 Data Maturity and Quality checks.
Base System Implementation
SCADA/ADMS system implementation can be structured in phases, starting with the implementation of the basic system, which includes database maintenance, system architecture, cybersecurity, SCADA processing, historian and FDIR equivalent functionalities in FLISR. The preliminary FLISR application shall support the pre-defined fault scenarios as per what the legacy FDIR application supports.
DMS & DERMS Applications and Dispatcher Training Simulator
After the base system has been established and DMMS data accurately imported into the SCADA/ADMS database, ADMS & DERMS applications can be implemented. The nucleus of ADMS applications is Distribution Power Flow and Distribution State Estimation. Once these functionalities are in operation, the subsequent applications such as FLISR (that leverage on power flow), Optimal Feeder Reconfiguration, Volt/Var Optimization, Short Circuit Analysis, Active Network Management, Network Operation Planning, etc. shall be implemented.
Dispatcher Training Simulator shall be set up with the capabilities of exuding full system functionalities. It will provide scenario builders and support trainer/trainee interaction.
OMS (MV with extension to LV)
While the legacy OMS system will remain in operation, the new SCADA/ADMS system with integrated OMS will provide an additional option for the operator with regards to outage management. As the new OMS system will integrate with many peripheral systems (e.g. MDMS, CIS, ERP, GIS, MWFMS, etc.), CIM Profiling & Implementation (IEC 61968) must be completed prior to the realization of the OMS functionalities.
OMS functionalities shall minimally cover MV outage management. If LV data is sufficiently populated into the system, OMS can be extended to cover the LV network.
Change Management focuses on organization and process change due to the implementation of the SCADA/ADMS system.
Forming of Data Centre Maintenance Subsection
A total of 3 Data centers will be formed, each data center will be managed by a newly formed up subsection. Each subsection will comprise of the manpower in the Data Centre. In addition, subsection head and subsection supervisory will be appointed so that each subsection will have minimally 8 personnel.
Human Resource Policy must be changed to cater to this group of personnel. TPC invested heavily in training the personnel and it takes years to master the SCADA/ADMS system, thus they should not be subjected to the common 3 years rotation scheme. They should be able to serve at least 10 years within the Data Centre Maintenance subsection without any hindrance to their career advancement. A separate career path should be created for the personnel.
DDCC and FDCC Operation
DDCC and FDCS Operators should be crossed trained so that they can help each other out during emergency situations (e.g. typhoon, outages, etc.). In the long run, DDCS and FDCS should be combined into the Distribution Operation. Each distribution operator will be responsible for one or more areas, managing the distribution network from distribution/secondary substations to the associated feeders.
Operator Training & Certification Program
With the establishment of the Dispatcher Training Simulator, it will be possible to formally train and certify the operators. Training can be divided into 2 types: Operator certification training and Operator routine training.
TPC currently conducts Operator certification training for all personnel aspires to become network operators. Pre-recorded scenarios or past events can be used to test the trainees to ascertain their dispatch competency.
Once operators are formally certified, they must go through a routine (6 to 12 months) training to ensure that they are familiar with their network and operation. Training can be arranged as a full day with the competence test planned at the end of it. Operator routine training aims to maintain the competency and knowledge of network operators.
In the long run after normalizing DDCC and FDCC operators, the distribution network operators can be further segregated into MV distribution and LV distribution operators. MV operators will continue to manage the MV network, from the substation to feeder lines. Whereas the LV operators will monitor the LV network. LV management can be realized with the establishment of Smart Meters, AMI infrastructure, MDMS, and OMS.
Data Center Renovation
Data centers (North, Central, and South) will be renovated prior to the Site Acceptance Testing of the SCADA/ADMS system.
Facility Design and Recommendation Report, which is separately submitted, specified the requirements of the future Data Centers. These data centers must be renovated according to the requirements so that it can assume it’s the responsibility of hosting visitors (e.g. overseas utilities).
Conclusion-Periodical Achievement (including current deployment and benefits) and prospective targets of ADMS
Challenges of Distribution Grid
Taiwan is aggressively promoting the policy of establishing a nuclear-free homeland by 2025 and has set a new target to increase the ratio of renewable energy generation to 20% by 2025. Renewables bring in opportunities and challenges too, especially high penetration of distributed energy resources (DER).
Evolving Distribution Grid
The traditional distribution network planning is focused on maintaining the system in safety, reliability and within a reasonable cost. The core is to supports investment decisions.
Nowadays the grid and resource mix is changing, distribution systems are changing, and distribution planning needs to change, which is primarily driven by technological advancement, the adoption of distributed energy resources and public policies that support the expansion of a more integrated distribution grid. Taiwan is targeting to increase the ratio of renewable energy generation to 20% by 2025. So, a more robust planning process is needed to ensure long-term infrastructure investment will continue to serve customers’ use of the grid over 30 years or more.