January 08, 2013
After 18 entries on my Insights on Power blog, let’s recap where we’ve been before plunging into the new year. For this purpose I’ll provide a synopsis and link to the original blog, plus additional links to related standards. These synopses are no substitute for the details and nuance in the original blogs.
In “Stopping Industrial Hackers: Cyber Security For IEDs,” we noted the efficacy of turning to the IEEE Power and Energy Society's Substations Committee’s work on IEEE 1686, “Standard for Substation Intelligent Electronic Devices (IED) Cyber Security Capabilities.”
In “For Communications Interop, Follow Protocols” I recommended perusal of IEEE Standard 1815, which is also known as the Distributed Network Protocol, or DNP3, described in this press release. Here’s a link to the DNP User’s Group.
In “Industrials and the Utility: Standards for Interconnection Save Money,” I described how IEEE 1547, “Standard for Interconnecting Distributed Resources with Electric Power Systems,” can identify functionalities needed in control systems.
For my entry titled “Look Under The Hood: IEC 61850 For DER Interconnections,” I discussed the vagaries of implementing a standard called IEC 61850, a protocol promoted for communications between distributed energy resources such as wind power, solar photovoltaics, and an electric utility.
The European Network of Transmission System Operators for Electricity (ENTSOE) has issued a paper calling for IEC 61850 stakeholders (including IEC’s Working Group 10 and TC57) to address the issues it has identified.
“Assessing the Interface: Industrial Customers and the Utility” examined the limitations of relying on interval meters as the gateway. An alternative approach uses the meter solely to record usage; a separate appliance or gateway is used for bidirectional communications.
In “'Big Data’ and the Need for Improved Time Synchronization Standards,” I discussed the power industry’s recognition that a greater degree of accuracy for reference time synchronization, one that can be distributed over an Ethernet network, is needed.
Two standards are important here: IEEE Standard 1588, a precision time protocol that has become an international standard. The other relevant standard: IEEE Standard C37.238. The latter defines the precision time protocol of IEEE Standard 1588 in power system protection, control, and automation. IEEE Standard C37.238 addresses the specific needs of electric utilities.
The blog, “Selecting a Protection and Control Automation System,” pointed to pitfalls in the selection of vendors and systems for protection and control automation systems for industrial clients and offered a few guidelines. While I suggested that a single protection/substation equipment vendor may offer multiple automation/integration options, including a PLC protocol-based option, IEEE Standard 1815, IEC 61850 or even a proprietary option, the issue is complex. (As noted, IEC 61850 has encountered implementation issues.)
“Designing a Time Synchronization Source” notes that different time sources and distribution methods are available, depending on the degree of accuracy needed in the system. This blog is followed by “Assessing Vendor Claims on Time Resolution in IEDs,” which warns that absolute accuracy of events and channels between multiple IEDs is a challenge.
In “Addressing Time Synchronization Issues, Related Standards Work,” I discuss how to finesse the issues of system design and the selection of devices in the market. A vendor statement on absolute time accuracy would help. Fortunately, a standard on time-tagging in protection and disturbance IEDs is in the works.
“Substation Physical Security Back on the Front Burner” explored the link between “phy-sec” and “cyber-sec.” (No more “security through obscurity,” folks.)
In “Political and Regulatory Patchwork Governs Interconnection Policies,” I discuss the myriad non-engineering subtleties that can affect your work.
“Accommodating Bi-Directional Power Flow in Substation Design,” addressed the utility’s need for situational awareness of how your client’s bi-directional flow affects its grid.
In “Substation Automation and Automation of the Control House,” parsed the trend away from hardwired control panels in favor of soft controls and controls built into intelligent electronic devices (IEDs).
“Designing Substations and Transformers for Bi-Directional Power Flow” and the same title, “Part II,” were devoted to my remarks on a CSE webcast titled “Smart Grid and Transformers.” (View the webcast here.)
In “Ethernet Network Design Issues in the Substation” (Ethernet is a suite based on IEEE standard 802.3), I discussed functional and environmental factors required by such a design.
In my final blog of 2012, I looked forward in “DC Power and Renewable Resources.” If there’s one nascent technology you need to keep an eye on, it’s DC power’s efficiencies, which contribute to parity among renewables.
I hope readers had a peaceful holiday and next week we’ll resume our forward momentum.
Sam Sciacca is an active senior member in the IEEE and the International Electrotechnical Commission (IEC) in the area of utility automation. He has more than 25 years of experience in the domestic and international electrical utility industries. Sciacca serves as the chair of two IEEE working groups that focus on cyber security for electric utilities: the Substations Working Group C1 (P1686) and the Power System Relay Committee Working Group H13 (PC37.240). Sciacca also is president of SCS Consulting.