Tianwan River Three Hydropower Stations Retrofit Project
Retrofit & Modernization | China | 6 Units / 760 MW
NSD Electric completed a full-river domestic control-system upgrade for the Tianwanhe cascade, improving coordinated operation, reliability, and generation efficiency across three stations.
Sichuan, China
760 MW
6 High-Head Impulse Units
2020-2025
Localization + Frequency Control Upgrade
Project Overview
The Tianwanhe Cascade Hydropower Retrofit Project was implemented in phases from 2020 to 2025 across the Renzonghai, Jinwo, and Dafa stations. The one-reservoir, three-stage cascade includes 6 high-head impulse units with a total retrofit capacity of 760 MW.
NSD Electric supplied 6 sets of MGC2000 impulse-unit governor systems, 6 sets of IAEC4000 fully digital excitation systems, the full LDS-200 cascade control platform, site LCUs for all three stations, and a remote dispatch monitoring system. The work also included staged installation, cascade joint commissioning, and long-term technical support.
The project enables coordinated multi-station operation, higher water-resource utilization, and stronger supply reliability, setting a new benchmark for cascade hydropower control modernization.
NSD Scope of Supply
MGC2000 Governors
Six governor systems for high-head impulse hydropower units.
IAEC4000 Excitation
Digital excitation systems for all six generating units.
Cascade Control
LDS-200 cascade platform, station LCUs, and remote monitoring.
Lifecycle Service
Installation, staged retrofit, joint commissioning, and O&M support.
Technical Highlights
Supports linked control of multiple stations across one river basin.
Tailored for 120–140 MW high-head impulse units.
Improved scheduling compatibility and operating efficiency.
A model project for cluster-level domestic hydropower retrofit.
Need Support for a Hydropower Retrofit Project?
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