Turbine/generator governor droop/isochronous fundamentals - A graphical approach

Cosse, R.E.; Alford, Michael D.; Hajiaghajani, M.; Hamilton, Emily

doi:10.1109/pcicon.2011.6085887

Cited by 24 publications

(14 citation statements)

References 1 publication

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“…In a small APS frequency control is usually achieved by primary control [6], which is performed by the speed governor of the diesel generator (Figure 1) by means of two strategies: isochronous control and permanent droop control [7].…”

Section: Frequency Control Strategiesmentioning

confidence: 99%

Inverter-Based Diesel Generator Emulator for the Study of Frequency Variations in a Laboratory-Scale Autonomous Power System

Torres¹,

Lopes²

2013

EPE

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This paper presents the modeling, simulation and practical implementation of an inverter-based diesel generator emulator. The main purpose of this emulator is for the study of frequency variations in diesel-based autonomous power systems in a laboratory environment where the operation of a real diesel generator is not possible. The emulator basically consists in a voltage source inverter with a second order output filter which voltage references are given by the model of the diesel generator. The control of the emulator is based on the digital signal processor TMS320F2812, where the mathematical models of the diesel generator and the control of the inverter are computed in real-time. Parameters for the model were obtained from commercially available components. Experimental results for different values of speed droop showed that the emulator achieves a satisfactory performance in the transient and stationary response. For the stationary response, the measured frequency deviates from theoretical values with a mean absolute error of: 0.06 Hz for 0% droop, 0.037 Hz for 3% droop, and 0.087 Hz for 5% droop. For the transient response, the measured frequency nadir deviates from simulations in: 0.05 Hz for 0% droop, 0.02 Hz for 3% droop, and 0.1 Hz for 5% droop.

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Section: Frequency Control Strategiesmentioning

confidence: 99%

Inverter-Based Diesel Generator Emulator for the Study of Frequency Variations in a Laboratory-Scale Autonomous Power System

Torres¹,

Lopes²

2013

EPE

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“…Unlike the traditional scheme, DGs controlled by the costprioritized droop scheme proposed in [23] are dispatched based on load demand in the microgrid [12]. The purpose is to reduce generation cost for the microgrid, rather than share power proportionally among the DGs.…”

Section: B Traditional Proportional and Existing Cost-prioritized Drmentioning

confidence: 99%

“…The concept of droop has again been borrowed from conventional power system, where it has been used for controlling synchronous generators [12], [13]. For microgrids, the droop concept has been used in the primary layer of a control hierarchical architecture [14].…”

Section: Introductionmentioning

confidence: 99%

Decentralized Economic Dispatch Scheme With Online Power Reserve for Microgrids

Nutkani

Loh

Wang

et al. 2017

IEEE Trans. Smart Grid

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Decentralized economic operation schemes have several advantages when compared with the traditional centralized management system for microgrids. Specifically, decentralized schemes are more flexible, less computationally intensive, and easier to implement without relying on communication infrastructure. Economic operation of existing decentralized schemes is also usually achieved by either tuning the droop characteristics of distributed generators (DGs) or prioritizing their dispatch order. For the latter, an earlier scheme has tried to prioritize the DG dispatch based on their no-load generation costs. Although the prioritization works well with some generation costs saved, its reliance on only the DG no-load generation costs does not allow it to operate well under certain conditions. This paper thus presents a more comprehensive economic dispatch scheme, which considers the DG generation costs, their power ratings, and other necessary constraints, before deciding the DG dispatch priorities and droop characteristics. The proposed scheme also allows online power reserve to be set and regulated within the microgrid. This, together with the generation cost saved, has been verified experimentally under different reserve, load, and DG conditions.

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“…The droop control scheme is a classic decentralized control method. It has historically been applied to control paralleled synchronous generators in a conventional power system [28,29]. In MGs, the droop control schemes are used to control multiple DGs for proportional power sharing [30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

A Novel Decentralized Economic Operation in Islanded AC Microgrids

Han

Wang

et al. 2017

Energies

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Droop schemes are usually applied to the control of distributed generators (DGs) in microgrids (MGs) to realize proportional power sharing. The objective might, however, not suit MGs well for economic reasons. Addressing that issue, this paper proposes an alternative droop scheme for reducing the total active generation costs (TAGC). Optimal economic operation, DGs' capacity limitations and system stability are fully considered basing on DGs' generation costs. The proposed scheme utilizes the frequency as a carrier to realize the decentralized economic operation of MGs without communication links. Moreover, a fitting method is applied to balance DGs' synchronous operation and economy. The effectiveness and performance of the proposed scheme are verified through simulations and experiments.

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Turbine/generator governor droop/isochronous fundamentals - A graphical approach

Cited by 24 publications

References 1 publication

Inverter-Based Diesel Generator Emulator for the Study of Frequency Variations in a Laboratory-Scale Autonomous Power System

Inverter-Based Diesel Generator Emulator for the Study of Frequency Variations in a Laboratory-Scale Autonomous Power System

Decentralized Economic Dispatch Scheme With Online Power Reserve for Microgrids

A Novel Decentralized Economic Operation in Islanded AC Microgrids

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