Draft:IPSA (software)
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|  |
| IPSA (Interactive Power System Analysis) | |
|---|---|
| Developer | TNEI Services Ltd |
| Release | 1974 |
| Operating system | Microsoft Windows |
| Type | Power system analysis |
| License | Proprietary commercial software |
| Website | www |
IPSA (Interactive Power System Analysis) is an electrical power system simulation package developed for electrical network modeling, load flow analysis, and short-circuit calculations.[1] Developed in 1974 at the University of Manchester Institute of Science and Technology (UMIST), it was an early power system simulation program to implement an interactive graphical user interface (GUI) on cathode-ray display terminals.[2]
The package is utilized by distribution network operators, transmission system planners, and educational institutions for steady-state, dynamic, and transient power network studies.[3][4]
History
[edit]IPSA was created in 1974 by C. A. Lynch under the academic supervision of Alfred Brameller at UMIST.[2] Prior to the introduction of interactive computing in power engineering, network analysis was typically conducted via batch processing systems using punched cards.[2] IPSA introduced graphical data input and display, allowing operators to construct network diagrams and review power flow calculations directly on screen.[2]
In 1983, computer-aided protection coordination routines were added to simulate inverse definite minimum time (IDMT) relay grading.[5] Modeling capabilities were further expanded in subsequent decades to support dynamic machinery, asynchronous motors, and renewable energy interfaces, including wind generation systems.[6] Software maintenance and commercial distribution rights later transferred to the engineering consultancy TNEI Services Ltd.[6]
Calculation Modules
[edit]IPSA performs numerical calculations for balanced and unbalanced network configurations:
- Load Flow Analysis: Calculates bus voltages, branch currents, and system losses using iterative numerical solvers such as the Fast Decoupled Newton-Raphson method.[1]
- Fault Analysis: Evaluates balanced and unbalanced short-circuit conditions in accordance with IEC 60909 and UK Energy Networks Association Engineering Recommendation G74 standards.[1]
- Protection Coordination: Models time-current characteristic curves for overcurrent relays, directional relays, and protection fuses.[5]
- Dynamic Stability: Simulates transient stability, synchronous generator governor dynamics, and grid-connected inverter systems.[6]
- Harmonic Distortion: Evaluates harmonic penetration levels, total harmonic distortion (THD), and filter design.[3]
- Automation Interface: Includes a Python API (PyIPSA) for batch network modeling and contingency analysis.[4]
See also
[edit]References
[edit]- 1 2 3 Lynch, C. A.; Smith, B. C. (1993). "Phase-shifting transformers in load flow and short-circuit analysis: modelling and control". IEE Proceedings C (Generation, Transmission and Distribution). 140 (4): 311–320. doi:10.1049/ip-c.1993.0049.
- 1 2 3 4 MANWEB (June 1977). Interactive Power System Analysis CAD Deployment (PDF) (Report). Merseyside and North Wales Electricity Board.
- 1 2 "Software List: IPSA". University of Sussex IT Services. Retrieved 2026-08-24.
- 1 2 Western Power Distribution (2019). WPD_EN_NIC_003 System Design: Capacity Engine (Technical report). National Grid Electricity Distribution.
- 1 2 Lynch, C. A.; Brameller, A. (1983). "Computer prediction of IDMT relay settings and performance for interconnected power systems". IEE Proceedings C (Generation, Transmission and Distribution). 130 (1): 23–30. doi:10.1049/ip-c.1983.0023.
- 1 2 3 Bradley, D.; Lynch, C. A. (2002). "Modelling of wind powered generation in AC power systems". 5th International Conference on Power System Management and Control. Institution of Electrical Engineers. pp. 58–63. doi:10.1049/cp:20020058.
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