Impact of wind generation on system operations in the deregulated environment: ERCOT experience

Huang, Shun-Hsien; Maggio, David; McIntyre, Kenneth E.; Betanabhatla, Vijay; Dumas, John; Adams, John

doi:10.1109/pes.2009.5275247

Cited by 31 publications

(11 citation statements)

References 1 publication

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“…To account for this error while managing frequency and to reduce the inaccurate balancing deployment caused by WGRs, ERCOT added WGR QSE's SCE to the balancing energy requirement. ERCOT also implemented the wind forecasting tool to provide hourly wind forecast for both the individual wind farms and on the aggregate system level and continue to improve the accuracy of forecasting [8,9,10,11].…”

Section: Effect On Management Of Frequencymentioning

confidence: 99%

“…ERCOT operators are forced to use more expensive ancillary reserves more frequently in order to maintain frequency at the desired level. To address this issue, ERCOT is improving wind generation forecast tool for real time operation while making changes to ancillary service requirement determination methodology to take into consideration the effects of wind generation [8,9,10,11,12].…”

Section: Introductionmentioning

confidence: 99%

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Wind generation scheduling and coordination in ERCOT Nodal market

Hui

Yu²,

Gao³

2012

2012 IEEE Power and Energy Society General Meeting

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ERCOT has completed its transition from a Zonal market to an advanced Nodal market in December 2010. The new Nodal market enables Wind Generation Resources (WGRs) to realize their asset's value and ensures the system reliability at the same time. ERCOT forecasts and publishes the Short-Term Wind Power Forecast (STWPF) and Wind Generation Resources Production Potential (WGRPP) for the next 48 hours. Utilizing STWPF in conjunction with specific local WGR information, the Qualified Scheduling Entities (QSE) submit Current Operating Plan (COP) for their WGR providing projected WGR capacities and statuses. The wind generation scheduling in Day-Ahead Market (DAM), Reliability Unit Commitment (RUC) and Security ConstrainedEconomic Dispatch (SCED) is discussed in this paper. Phase shifting transformers tap settings are automatically determined as part of DAM and RUC optimization process to allow more effective power transfer from wind farms in the West Texas area to ERCOT load centers. In real-time operation, Nodal market recognizes the intermittence and variability of wind generation and imposes a wider tolerance for wind generating resource while applying Base Point deviation charges.

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Section: Effect On Management Of Frequencymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Wind generation scheduling and coordination in ERCOT Nodal market

Hui

Yu²,

Gao³

2012

2012 IEEE Power and Energy Society General Meeting

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“…According to [6], wind may increase or decrease in a large ramping rate. According to [6], wind may increase or decrease in a large ramping rate.…”

Section: Wind Ramp Adjustmentmentioning

confidence: 99%

“…Another practical case that affects the update of 15-min settlement is the reserve usage by the wind farms. According to [6], wind may increase or decrease in a large ramping rate. This situation usually depletes the regulating reserve during the wind ramp period.…”

Section: Wind Ramp Adjustmentmentioning

confidence: 99%

“…Because regulating reserve is primarily used for continuous frequency control, the required quantity may result from the load behavior which could make significant change during the daily or seasonal periods. In order to deal with such time varying conditions, some market operations update the settlement of regulating reserve in every 15-min interval to ensure that the reserve is not depleted for the ancillary service [6]. Therefore, it implies that the allocation of regulating reserve should be more adaptive to the system condition.…”

Section: Introductionmentioning

confidence: 99%

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Adaptive regulating reserve scheduling for the isolated power system

Chang-Chien

Chien

2011

Int Trans Elec Energy Syst

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SUMMARY Regulating reserve is generally deployed to support system frequency. Because the moment‐to‐moment load fluctuations require continuous frequency control, allocating the reserve for this kind should be flexible to support the function of automatic generation control. Because fast response units not only are assigned to support automatic generation control but also are utilized to deal with credible frequency events, the regulating reserve may be planned as a portion of contingency reserve for security concern, especially for an isolated power system. Without inter‐tie to mutually support system frequency, frequency of an isolated system is much more sensitive to the disturbances than that in the interconnection. Therefore, the scheduling of regulating reserve for an isolated system should be more cautious to take both security and economy into account. This paper describes a methodology that adaptively schedules the regulating reserve based on the dynamic security margin as well as the ongoing demand of the system. Compared with the conventional way of using the historical data, the proposed scheduling method is proven to be more capable of dealing with the change of system condition and furthermore potentially reducing the extraneous reserve. More operational cases will be presented to show the merits of the proposed method that is applied to the ancillary service market. Copyright © 2011 John Wiley & Sons, Ltd.

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Ancillary Services (AS) at ERCOT

Du¹

2023

Power Electronics and Power Systems

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Impact of wind generation on system operations in the deregulated environment: ERCOT experience

Cited by 31 publications

References 1 publication

Wind generation scheduling and coordination in ERCOT Nodal market

Wind generation scheduling and coordination in ERCOT Nodal market

Adaptive regulating reserve scheduling for the isolated power system

Ancillary Services (AS) at ERCOT

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