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# Mindanao Power Grid Placed Under Red Alert as Power Reserves Tighten
- URL: https://www.wwconemedia.com/mindanao-power-grid-placed-under-red-alert-as-power-reserves-tighten/
- Published: 2026-09-09T00:42:57.000Z
- Updated: 2026-09-09T00:42:57.000Z
- Author: WWC NEWSDESK
- Tags: TECHNOLOGY

**MANILA, Philippines —** The Mindanao power grid was placed under **red alert on Tuesday, September 8**, as available electricity supply fell dangerously close to projected demand, according to the National Grid Corporation of the Philippines (NGCP).

The latest alert highlights continuing power-supply pressure in Mindanao, where several generating units remain unavailable or operating below full capacity.

According to NGCP data cited by multiple news outlets, the Mindanao grid had an **available capacity of about 2,673 megawatts (MW)** against a projected peak demand of **2,639 MW** during the affected period. That leaves only a narrow margin between supply and demand.

## Red alert declared during peak periods

The red alert was scheduled from **1 p.m. to 4 p.m. and again from 5 p.m. to 9 p.m. Tuesday**, according to the latest NGCP advisory reported by the Philippine News Agency.

Yellow-alert periods were also scheduled around those windows as the grid moved through periods of particularly tight operating reserves.

A **red alert** means the available power supply is insufficient to meet consumer demand together with the transmission grid's regulating requirements. A **yellow alert**, meanwhile, means the operating margin is insufficient to meet the grid's contingency requirement.

Importantly, an alert declaration **does not automatically mean that a power interruption will occur in every area**. However, the reduced reserve margin increases the risk of supply disruptions if additional generating capacity becomes unavailable or demand rises unexpectedly.

## Plant outages squeeze Mindanao's power supply

NGCP attributed the tight supply situation partly to the **tripping of Minergy coal-fired Unit 2**, while GMA News also reported the unavailability of major Mindanao generating facilities.

The grid operator said multiple generating units were already on forced outage. As of September 8, **10 plants were on forced outage in September**, with additional plants having been unavailable since previous months. Five other plants were operating at reduced, or derated, capacities.

Together, these outages and deratings left roughly **763.6 MW of capacity unavailable** to the Mindanao grid, according to figures reported by GMA News.

## Mindanao has faced repeated power alerts

Tuesday's red alert is not an isolated event.

Mindanao has experienced several power-supply warnings in recent weeks as generating plants remained unavailable and operating reserves stayed thin. On September 3, for example, NGCP placed the Mindanao grid under red alert for several hours, with available capacity below projected peak demand.

The recurring alerts have raised concerns about the reliability of electricity supply in the country's second-largest island group, particularly during periods of high demand.

Earlier this month, the Department of Energy said battery-storage facilities and power barges could help address continuing supply problems affecting the Visayas and Mindanao grids. BusinessWorld reported that the DOE was looking at measures intended to ease the persistent grid constraints.

## Visayas also faces supply pressure

Mindanao is not the only major grid facing tight reserves.

The **Visayas grid was also placed under a red alert Tuesday**, while additional yellow-alert periods were declared amid continuing supply constraints. The situation underscores broader generation and reserve challenges affecting parts of the Philippine power system.

The limited availability of generating units has repeatedly forced NGCP to issue alerts across the two island groups in recent days.

## What the red alert means for consumers

For electricity consumers in Mindanao, the alert is primarily a warning that the power system has **very little reserve capacity** during the affected periods.

If additional generating units trip or demand unexpectedly exceeds forecasts, authorities and grid operators may need to take measures to protect the stability of the power system.

Consumers should therefore continue monitoring announcements from their local electric cooperatives, distribution utilities and NGCP for any service interruptions or emergency measures.

For now, Tuesday's red alert underscores a bigger concern: **Mindanao's power system is operating with a much thinner safety margin than usual.**

And with several generating units still unavailable, the question is no longer simply whether the grid can meet today's demand—it is whether enough reserve capacity can return before the next major surge in electricity use.

### WWC ONE MEDIA G.A