EMS System Generated Notices
EMS System-Generated Notices
The following notices are Energy Management System (EMS) system-generated and will display on the MIS website’s Notices page. Additionally these notices are sent out asynchronously to the Market Participants(MP) Listeners.
When an alert clears (or becomes normal) in EMS, a subsequent alert will be generated with text (“-RETURN”) appended to original alert. This follow-up alert will also be displayed on the MIS website’s Notices page and delivered to MP listeners.
The following table identifies the Resource Limit Calculator (RLC) alarm ID, description of the requirement, notice type, priority, audience, and alert text. Please note that any alert with a * in the description denotes that the resource has become undispatchable by SCED, and RLC will set HDL=LDL=MW Output.
| # | ALARMID | Description | Type | Priority | Audience | Text |
|---|---|---|---|---|---|---|
| 1 | RLCUHSL RLCLHSL |
The telemetered HSL <= 0. * for generation resources excluding ESRs or MPC<0 for Load Resources |
Telemetry | High | A QSE | QSE: <QSE_ID> UNIT: <ID> ALERT: TEL HSL BELOW 0
Note: <ID> 🠆 <SUBSTATION>-<UNIT#> Note: <ID> 🠆 <SUBSTATION>-<LOAD#> |
| 2 | RLCULSL RLCLLSL |
The telemetered LSL < 0. * for generation resources excluding ESRs or LPC<0 for Load Resources |
Telemetry | High | A QSE | QSE: <QSE_ID> UNIT: <ID> ALERT: TEL LSL BELOW 0
Note: <ID> 🠆 <SUBSTATION>-<UNIT#> Note: <ID> 🠆 <SUBSTATION>-<LOAD#> |
| 6 | RLCCCNO | For Combined Cycle configuration number validation, set it to default or last good value not 0. * | Telemetry | High | A QSE | QSE: <QSE_ID> UNIT: <ID> ALERT:
INVALID CC CONFIG
Note: <ID> 🠆 <SUBSTATION>-<UNIT#> |
| 7 | RLCHLSL | Invalid HSL or LSL telemetry (quality suspect). * | Telemetry | High | A QSE | QSE: <QSE_ID> UNIT: <ID> ALERT:
INVALID TEL HSL OR LSL
Note: <ID> 🠆 <SUBSTATION>-<UNIT#> |
| 8 | RLCXGTBD | Invalid or suspect resource status codes. * | Telemetry | High | A QSE | QSE: <QSE_ID> UNIT: <ID> ALERT:
INVALID TEL RST
Note: <ID> 🠆 <SUBSTATION>-<UNIT#> |
| 9 | BCRSMTCH | Add a SCADA calculation to sum the Mw telemetry of transmission lines moving power from a generating plant. Compare this total to the sum of the telemetered Mw output of the Resources at the same plant. Alarm the QSE if the amount exceeds a threshold. | Telemetry | High | A QSE | ALERT :<RES_ID> - TEL MW= <VALUE> TRANS SUM=
<VALUE>
Note: <RES_ID> 🠆 <SUBSTATION> <UNIT#> |
| 10 | RLCSUSMW | If the HDL = LDL = Actual Generation and Resource Status is not OFF then alarm the QSE operator to verify data telemetry used by RLC. * | Telemetry | High | A QSE | QSE: <QSE_ID> UNIT: <ID> ALERT: SUSPECT TEL HDL=LDL=MW |
| 11 | RLCRSTMW |
If Resource Status is OFF, and Resource output Mw is greater than 2
Mw, then alarm incorrect status.
If Resource Status is ON, but MW < 0.1 MW, then alarm incorrect
status.
RLC will set RST to “N/A” and set HDL=LDL=MW Output – |
Telemetry | High | A QSE | QSE: <QSE_ID> UNIT: <ID> ALERT:
INCONSIST RST AND MW
Note: <ID> 🠆 <SUBSTATION>-<UNIT#> |
| 14 | BCVOLLUN | ERCOT shall notify each QSE representing the Split Generation Resource of any errors in telemetry detected by the State Estimator. | Telemetry | High | A QSE | QSE:[qse], SUBSTATION:[substn], UNIT:[unitname],SE SGU ERROR MW=[123] TSUM=[1234], |
| 15 | BCABRANCH | Once transmission line and transformer Dynamic Ratings are retrieved, ERCOT shall compare the actual flow and state estimated flow calculation of MVA to the effective Transmission Element limit and, if an out-of-limit condition exists, ERCOT shall produce an overload notification | Telemetry | High | A TSP | ALERT: <SUBSTATION : EQUIPMENT IDENTIFICATION>
<value> TEL OVERLOAD
OR ALERT: <SUBSTATION : EQUIPMENT IDENTIFICATION> <value> SE OVERLOAD |
| 17 | RLCHCAP | HSL is higher than the net dependable capability | Telemetry | High | QSE | QSE:[qse], SUBSTATION:[substn], UNIT:[unitname],HSL > THAN CURCAP |
| 18 | LFUPDT | ERCOT System, Weather Zone, and Load Zone Load forecasts for the next seven days, by hour, and a message on update indicating any changes to the forecasts by means of the Messaging System; | Market Message | Low | All MPs | ERCOT 7 DAY LF UPDATED <Add Alert Time> |
| 19 | EMS-LDF-UPDATE-VERIFICATION | Notify QSEs of posting and availability of report NP4-159: Load Distribution Factors. | Market Message | Low | All MPs | EMS-LDF-UPDATE-VERIFICATION completed on <YYYY-MM-DD HH24:MI:SS>. The LDF Report will be available by <YYYY-MM-DD HH24:MI:SS> |
| 20 | RLCNEGRR | The Normal or Emergency Ramprates < 0 | Telemetry | High | QSE | QSE: <QSE_ID> UNIT: <ID> ALERT: NEG RAMP RATE Note: <ID> 🠆 <SUBSTATION>-<UNIT#> |
| 21 |
RLCSOCMX RLCSOCMN |
SOC > Max SOC or SOC < MNSOC | Telemetry | High | QSE | QSE: <QSE_ID> UNIT: <ID> ALERT: SOC > MXSOC/SOC<MNSOC Note: <ID> 🠆 <SUBSTATION>-<UNIT#> |
| 22 |
RLCHLTL RLCLHLTL |
The telemetered HSL < LSL or LPC<MPC. * |
Telemetry | High | QSE | QSE: <QSE_ID> UNIT: <ID> ALERT: TEL LSL BELOW 0 Note: <ID> 🠆 <SUBSTATION>-<UNIT#> Note: <ID> 🠆 <SUBSTATION>-<LOAD#> |
| 23 |
RLC RLC RLC RLC RLCLRURR RLCLRDRR RLCLECRR RLCLNSRR |
The Ancillary Service Ramp Rates (RURR, RDRR, ECRSRR, NSRR) <0 | Telemetry | High | QSE | QSE: <QSE_ID> UNIT/LOAD: <ID> 🠆 ALERT: NEG REGUP/REGDN/ECRS/NS RAMP RATE Note: <ID> 🠆 <SUBSTATION>-<UNIT/LOAD#> |
| 24 |
RLCUPFRC RLCUFFRC RLCNEGFF RLCLPFRC RLCLFFRC RLCLUFRC |
RRS-PFR, RRS-FFR and RRS-UFR MW capability < 0 | Telemetry | High | QSE | QSE: <QSE_ID> UNIT/LOAD: <ID> ALERT: NEG RRSPFR/RRSUFR/RRSFFR MW CAP Note: <ID> 🠆 <SUBSTATION>-<UNIT/LOAD#> |
| 25 |
RLCRDRRQ RLCECRRQ RLCNSRRQ RLCURGUQ RLCURGDQ RLCUECRQ RLCUNSQ RLCLRGUQ RLCLRGDQ RLCLECRQ RLCLNSQ |
AS Ramprates > AS qualification | Telemetry | High | QSE | QSE: <QSE_ID> UNIT/LOAD: <ID> ALERT: REGUP/REGDN/ECRS/NS RR > Qual MW Note: <ID> 🠆 <SUBSTATION>-<UNIT/LOAD#> |
| 26 |
RLCRRUFQ RLCRRFFQ RLCUFFRQ RLCLPFRQ RLCLFFRQ RLCLUFRQ |
AS MW capability > AS qualification | Telemetry | High | QSE | QSE: <QSE_ID> UNIT/LOAD: <ID> ALERT: RRSPFR/RRSUFR/RRSFFR MW > Qual MW Note: <ID> 🠆 <SUBSTATION>-<UNIT/LOAD#> |
| 27 |
RLCLRFFQ RLCLRECQ RLCSPUFQ RLCSPFFQ RLCSPECQ |
For NCLRs self provided RRS-UFR, RRS-FFR, ECRS > Qualified MW | Telemetry | High | QSE | QSE: <QSE_ID> LOAD: <ID> ALERT: UFR/FFR/ECRS MW > Qual MW Note: <ID> 🠆 <SUBSTATION>-<LOAD#> |
| 28 | RLUFARM | For NCLRs HSUF is disarmed and Self Provision MW > 0 | Telemetry | High | QSE | QSE: <QSE_ID> LOAD: <ID> ALERT: HSUF DISARMED UFR/FFR/ECRS MW >0 Note: <ID> 🠆 <SUBSTATION>-<LOAD#> |
| 29 | RLCUCBNC |
MW > 0.9 and Unit CB Closed for Generators excluding ESRs or MW>0.9 and CB Open for Generators excluding ESRs or ESR MW > Threshold and ESR CB Open or 0.9 |
Telemetry | High | QSE | QSE: <QSE_ID> UNIT: <ID> ALERT: INCONSIST RST AND MW Note: <ID> 🠆 <SUBSTATION>-<UNIT#> |