---
title: "Load management techniques"
subject: "Industrial Power Distribution and Illumination"
chapter: 10
key: "semester_6/industrial_power_distribution_and_illumination:load-management-techniques"
source: https://www.bctengineer.com/q/semester_6/industrial_power_distribution_and_illumination/load-management-techniques
site: BCT Engineering
---

# Load management techniques

Industrial Power Distribution and Illumination · Chapter 10: Electrical Energy Audit in Industry

- Asked in: 2078 Chaitra, 4 marks; 2072 Asoj, 4 marks (asked 2 times)
- Video: [LOAD SCHEDULING AND METHODS OF LOAD MANAGEMENT](https://www.youtube.com/watch?v=Iginzv-bw40) — House Of Learners
- Answer checked by Claude Opus 5.5 (high effort) on 2026-10-14
- Page: https://www.bctengineer.com/q/semester_6/industrial_power_distribution_and_illumination/load-management-techniques
- Whole chapter: https://www.bctengineer.com/md/semester_6/industrial_power_distribution_and_illumination/chapter-10

## Question

What is Load Management? Explain different Load Management Techniques.

## Answer

**Load management** is the planned control of when and how much electrical load an industry draws, so that the **maximum demand and peak-hour consumption are reduced** and the load curve is flattened, without lowering production. It lowers demand charges, time-of-day energy cost and losses, and helps the utility too.

#### Load management techniques
1. **Peak clipping (shaving):** reduce or switch off non-essential loads during peak hours (e.g. 17:00–23:00 in Nepal's NEA time-of-day tariff) using a maximum demand controller.
2. **Load shifting:** move flexible loads – water pumping, batch furnaces, charging, grinding – to off-peak or night hours where the tariff is lower.
3. **Valley filling:** add useful loads in off-peak hours (thermal storage, ice making, battery charging).
4. **Staggering / rescheduling of operations:** stagger the starting of large motors, shift timings and lunch breaks so that large loads do not run together.
5. **Maximum demand controller (MDC):** monitors demand continuously and automatically trips selected low-priority loads when demand approaches a set limit.
6. **Power factor improvement:** capacitor banks reduce kVA demand for the same kW.
7. **Use of storage:** thermal storage, compressed air receivers, water tanks, batteries to supply part of peak demand.
8. **Captive / standby generation** during peak hours if cheaper than grid peak tariff.
9. **Efficient equipment and VFDs:** reduce the load itself (soft start reduces starting peaks).

```text
kW │   ___peak (clip)
   │  /   \        shifted
   │ /     \___    loads
   │/  valley  \__/‾‾‾ (fill)
   └───────────────────── hours
```

## Check yourself

The answer's key points as multiple-choice questions, with the correct option and why.

1. What is the main aim of load management?
   A. Increase the total energy consumption
   B. Reduce production to save energy
   C. Reduce maximum demand and peak-hour consumption and flatten the load curve without lowering production
   D. Increase the supply voltage
   Answer: C. Load management controls when and how much load is drawn to cut peaks while keeping production. (Key point: Load management aim)

2. Which pair correctly describes peak clipping and valley filling?
   A. Both reduce loads at off-peak hours
   B. Clipping adds load at night; filling cuts load at peak
   C. Clipping cuts non-essential load at peak; filling adds useful load in off-peak hours
   D. Both add load at peak
   Answer: C. Clipping reduces peak load, filling uses the valley by adding off-peak load. (Key point: Peak clipping vs valley filling)

3. What is load shifting?
   A. Moving flexible loads such as pumping or batch furnaces from peak to off-peak hours
   B. Disconnecting loads permanently
   C. Changing the supply voltage
   D. Adding capacitors
   Answer: A. Load shifting moves flexible loads to the cheaper off-peak time. (Key point: Load shifting)

4. What does a maximum demand controller do?
   A. Increases the pf
   B. Monitors demand and automatically trips low-priority loads as demand nears the set limit
   C. Starts the DG set
   D. Records only the energy bill
   Answer: B. The MDC sheds selected loads automatically to avoid exceeding the demand limit. (Key point: Maximum demand controller)

## Related in Industrial Power Distribution and Illumination

- [Load scheduling and load management](https://www.bctengineer.com/question.md?key=semester_6%2Findustrial_power_distribution_and_illumination%3Aload-scheduling-management) — Industrial Power Distribution and Illumination, chapter 10

## Related in other subjects

- [Solid waste management system and techniques](https://www.bctengineer.com/question.md?key=semester_7%2Fenvironment_and_pollution_control%3Asolid-waste-management-techniques) — Environment and Pollution Control, chapter 5
- [Comparison of load flow techniques](https://www.bctengineer.com/question.md?key=semester_5%2Fpower_system_analysis_ii%3Aload-flow-techniques-comparison) — Power System Analysis II, chapter 2
- [Significance of load flow techniques](https://www.bctengineer.com/question.md?key=semester_5%2Fpower_system_analysis_ii%3Aload-flow-techniques-significance) — Power System Analysis II, chapter 2
- [Load management, tariff in DSM, tariffs in Nepal](https://www.bctengineer.com/question.md?key=semester_7%2Futilization_of_electrical_energy%3Aload-management-tariff-types-nepal) — Utilization of Electrical Energy, chapter 6