Substation HMI design for Silicon Valley Power

Asoke De, Silicon Valley Power,Galina Antonova and Alexandre Piatniczka, ABB

Power Energy Automation Conference 2020

March 3rd 2020, Seattle, Washington, USA

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• Introduction• Architecture of Data Acquisition system

• Primary components for new and existing stations• Substation HMI design and features

• Design process• Common template

• Benefits of Substation HMI• Conclusions

Outline

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• Started in 1896 with 40 streetlights powered by DC generator• Matured over nearly 125 years into a utility with peak load in excess of 500 MW• Four receiving stations with nominal receiving voltages of 115 and 230 kV• BES Reliability and CIP requirements apply because of these receiving stations• 28 distribution substations with nominal receiving voltage of 60kV and distribution voltage of 12 kV.

Silicon Valley Power (SVP) – Electric Department of the City Santa Clara

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• Substations are only minutes away from the Control Center and Utility Central Yard and could be quickly reached for troubleshooting during work hours. Off hours response is quite a bit more challenging…• Off hour response time by Utility personnel could be an hour or more – the unfortunate consequence of being in the heart of Silicon Valley!• Substation HMI allows the Control Room operators to have full visibility of the substation.• Provides the operators ability to better assess and respond to incidents, while waiting for a substation personnel to respond and address the issue.• Modernize substations and make additional information available through the substation HMI, without having to simultaneously update the central SCADA servers and database.

Why SVP needs Substation HMI?

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Various industry standards on HMI requirements and development exist: International Society of Automation (ISA), International Electrotechnical Commission (IEC) and Institute of Electrical and Electronics Engineers (IEEE), so a generation of a Recommended Practice for HMIs used in Utility Automation Systems, IEEE PC37.1.3 would be beneficial and is currently on-going under IEEE Power Systems Relaying and Control Committee (PSRC) Working Group H46.

Industry Standards on Substation HMIs

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1. Provide an integrated view of the substation devices and a central place for monitoring and controlof these devices, for routine and emergency operations.

2. Mimic Control Center displays for the substation, so that the Control Center and local operatorsessentially have identical view of the substation. This is especially important duringtroubleshooting faults at the substation by local operators.

3. Provide similar HMI experience across substations. This may be difficult when the substations areof different vintages. However, despite the differences in the actual hardware, all substationsshare some common features, which are leveraged to provide a consistent HMI design.

Substation HMI Design Objectives

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—Architecture of SVP Substation SCADA and HMI

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—Addition of HMI functionality to an existing station

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—Connectivity to Historian

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1. Design and build Substation HMI

2. Add RTU hardware to the substation

3. Program RTU to acquire SCADA data by communicating with the existing (Sub) RTU(s)

4. Program the existing RTU(s) to communicate with the HMI server.

Substation HMI design process

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• Once the HMI server is commissioned and in service, HMI could be brought up on any machine with a web browser.

• If IP connectivity exists between the substation and the Control Center, substation HMI’s could be brought up on a web browser-equipped machine.

• This enables the Control Center operators to have full visibility and control of the substation during normal operation and when SCADA/DNP communication fails, if IP connectivity between Control Center and the stations still exists.

Web server functionality

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Substation HMI Template has:- Single Line page- Station Alarm page- Analogs page- Transformer page- Protection page- Communication page- Alarms and Events page

Common Substation HMI Template

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Designed to present most of the information that is needed for routine substation operation: Substation Single Line diagram presenting

- Substation electric network- Controllable elements, namely circuit breakers, recloser and ground features- Important analogs- Transformer controls Closely mimics the Control Central Single line diagram for the substation Default start page for the substation HMI

Single Line page

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—Single Line page, the start up page for the substation HMI

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—Single Line page from Control Center

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• Effectively the annunciator for the substation• Minimalistic design to draw operator attention to alarm conditions

- Points in alarm / abnormal state are designated as solid red circles- Points in normal states are represented by solid or hollow green circles- Has a visual representation of the substation light, used to indicate any standing/unaddressed

alarm

• Together with the Event List, eliminates the need for annunciator drops / latched alarms• Configurable latched or non-latched alarms• Station Alarms List:

- Superset of substation status alarm points- Not all points need to be reported back to Control Center

Station Alarm page

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—Station Alarm page

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Filter Dialog: Filtered Event List :

Configuration option to report live or latch alarms • In old stations latched alarms need to be cleared• New stations can report live or latched alarms

Filtering Event List

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—Analogs page

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Presents all the substation analogs in a tabular fashion

—Transformer page

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Presents all status and analog information relevant to the transformers at the station

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• Primarily used in modern stations with electronic relays (IEDs) with protection functions- Relay targets and protection alarms- Relay health - May be spread over several pages, depending on the size of the station

Protection page

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Presents all protection alarms for the station

• Between the substation RTU and then field IED’s• DNP communication between RTU and various masters, namely SCADA servers, and Historian

servers

Communications pagePresents SCADA communication status

—Protection page – Relay Targets

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Presents status of relay targets from IED’s at a substation

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• Initial presentation of the HMI is in the “View Only” mode• Explicit login is required if Control operations need to be performed

Login Dialog:

Control operation: Explicit Login

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• Control Authority must be requested prior to performing control operations• “Local” Control on one HMI client prevents control operations from all other HMI clients

Control operation: Control Authority

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Request Control Authority prior to performing Control operations:

Control authority can be explicitly released or automatically expire after a preconfigured time:

Control operation: Control Authority

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Controls are operated in Multi-step Select before Operate way

Control Operation: Select before Operate

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• Increased personnel safety: controls performed using HMI, without access to primary equipment• Complete system visibility locally and remotely: no need to travel to sites if SCADA connectivity fails

for more than 30 minutes• Webserver enables all stations visibility from Control Center: should the SCADA system fail

Substation HMI acts as SCADA backup• Common Substation HMI template: all involved personnel tasks are simplified• Datapoint mapping and re-programming RTUs caused zero SCADA down time• Ease of implementing and integrating with existing stations: protocol converters utilized• Full system visibility from Control Center and from anywhere in the SVP system dramatically

enhanced troubleshooting

Benefits of Substation HMI

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• Provide an integrated view of the substation devices and a central place for monitoring and control of these devices, for routine and emergency operations.

• Mimic Control Center displays for the substation, so that the Control Center and local operators essentially have identical view of the substation. This is especially important during troubleshooting faults at the substation by local operators.

• Provide similar HMI experience across substations. This may be difficult when the substations are of different vintages. However, despite the differences in the actual hardware, all substations share some common features, which are leveraged to provide a consistent HMI design.

• Provides full visibility and control of the substation equipment in the event of failure of SCADA communication between the Control Center and the substation RTU.

Benefits of Substation HMI

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—Communication/control diagram for a legacy RTU replacement project

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SVP deployed Substation HMI for all existing and new stations in the system

Substation HMI brought numerous benefits including personnel safety, full system visibility from any point in the SVP network, and acting essentially as a SCADA backup system

Ease of design, standard HMI template, mimicking SCADA screens, direct data point mapping resulting in zero SCADA downtime while commissioning substation HMI systems are the key learnings

SVP experience and expertise will be channeled in as valuable input into IEEE PSRC H46 Working Group generating a Recommended Practice for HMIs used in Utility Automation Systems.

Conclusions

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Substation HMI design for Silicon Valley PowerOutlineSilicon Valley Power (SVP) – Electric Department of the City Santa ClaraWhy SVP needs Substation HMI?Industry Standards on Substation HMIsSubstation HMI Design ObjectivesArchitecture of SVP Substation SCADA and HMIAddition of HMI functionality to an existing stationConnectivity to HistorianSubstation HMI design processWeb server functionalityCommon Substation HMI TemplateSingle Line pageSingle Line page, the start up page for the substation HMISingle Line page from Control CenterStation Alarm pageStation Alarm pageFiltering Event ListAnalogs pageTransformer pageProtection pageProtection page – Relay TargetsControl operation: Explicit LoginControl operation: Control AuthorityControl operation: Control AuthorityControl Operation: Select before OperateBenefits of Substation HMIBenefits of Substation HMI Communication/control diagram for a legacy RTU replacement projectConclusions