Techno-economic approach towards reactive power planning ensuring system security on energy transmission network
-
Nihar Karmakar
and
Biplab Bhattacharyya
Abstract
This research work proposes a planning strategy pertaining to the techno-economic operation of Indian power systems. The proposed strategy focused on the reactive power (VAr) planning (RPP) subject to the system operating cost minimization ensuring system security. To mitigate the RPP issue, unique meta-heuristic hybridized techniques are adopted to size the optimal parameter settings such as alternator’s reactive power, tap settings of transformers etc. instigated by power flow analysis satisfying all equality and inequality constraints. The controlling variables are optimally determined to solve this non-linear RPP problem. The bottleneck for the installation of static VAr compensators at weak buses is also wiped out by different analytical techniques viz. loss sensitivity, power flow and modal analysis. Two different inter-regional transmission networks prevailing in India are considered to measure the adaptability, efficacy and efficiency of the proposed approach. The results obtained by applying the proposed approach have confirmed that network loss-minimization procedures produce an acceptable solution and reduce the operating cost which is especially important in RPP. The responses of bench mark functions and statistical analysis of the outcomes from both systems allow us to assess the overall efficiency and efficacy of the proposed techno-economic planning approach.
Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission
Research funding: None declared.
Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
List of Principal Symbols
Load flow and cost related symbols
Susceptance and transfer conductance
- gk
Line Conductance
- nb
Number of buses
- ng
Number of PV buses
- Nch
Line charging elements
Active and VAr demand at the ith bus
Active and VAr generation at the ith bus
- Qch
Total reactive power supplied during charging
- Vi, Vj
ith and jth bus voltages
- Ych
Admittance of line charging
- δ0i, δ0j
ith and jth bus phase angles, respectively
Constraints and Ybus related symbols
- Isec
Transformer secondary current
- m
Number of lines
- ntap
Number of transformer
- OLTC
Open-loop tap changing transformers
- QG
Generated reactive power
- ℚGmax
High limit of generated reactive power
- ℚGmin
Low limit of generated reactive power
- tap
Tap settings of OLTC
- VG
Alternator bus voltages
- Vsec
Transformer secondary voltage
- VGmax
Maximum limit of alternetor voltage
- VGmin
Minimum limit of generator voltage
- Yii
Sending end admittance
- Yjj
Receiving end admittance
Weak nodes and SVC related symbols
- Bsvc
Susceptance of SVC
- nsvc
Number of SVCs
- pop
Population
- ℚsvc
Total reactive power supplied by SVC
- ℚsvcmax
Maximum reactive power supplied by SVC
- ℚsvcmin
Minimum reactive power supplied by SVC
- ysvc
Admittance of SVC
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Articles in the same Issue
- Frontmatter
- Research Articles
- Design of a one kilowatt wireless charging system for electric vehicle in line with Bharath EV standards
- DC-link current based position estimation and speed sensorless control of a BLDC motor used for electric vehicle applications
- Controller design for output constrained thyristor controlled series capacitor (TCSC) of time-delayed power system
- Maximum power point tracking algorithm for photovoltaic systems considering error minimization and power derivative
- Techno-economic approach towards reactive power planning ensuring system security on energy transmission network
- Comparison between saturated-iron core and shielded-iron core superconducting fault current limiters on recloser-fuse coordination of radial distribution systems connected with distributed generation
- A composite power quality index for low-voltage active distribution networks
- Adaptive restart scheme based on active injection current ratio for half-bridge MMC-HVDC with overhead transmission lines
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Articles in the same Issue
- Frontmatter
- Research Articles
- Design of a one kilowatt wireless charging system for electric vehicle in line with Bharath EV standards
- DC-link current based position estimation and speed sensorless control of a BLDC motor used for electric vehicle applications
- Controller design for output constrained thyristor controlled series capacitor (TCSC) of time-delayed power system
- Maximum power point tracking algorithm for photovoltaic systems considering error minimization and power derivative
- Techno-economic approach towards reactive power planning ensuring system security on energy transmission network
- Comparison between saturated-iron core and shielded-iron core superconducting fault current limiters on recloser-fuse coordination of radial distribution systems connected with distributed generation
- A composite power quality index for low-voltage active distribution networks
- Adaptive restart scheme based on active injection current ratio for half-bridge MMC-HVDC with overhead transmission lines
- Fast recovery strategy for MMC-HVDC based on coordination of fault current suppression and adaptive restart
