About China Electric Power Research Institute

China Electric Power Research Institute

The China Electric Power Research Institute, usually shortened to CEPRI, is the central research institute of China's State Grid system. Established in 1951, it is described by the State Grid Corporation of China (SGCC) as a comprehensive and multidisciplinary research institute affiliated to the corporation, devoted to research and development, technical service and consulting, testing and inspection, and technical standard formulation of fundamental and universal significance to power grids. Based in Beijing, CEPRI sits at the technical centre of the world's largest electricity utility system: the questions it works on — how to generate, transmit, distribute and use electricity safely and reliably at continental scale — are the questions on which China's power sector runs.

Origins and place in the State Grid system

CEPRI was founded in 1951, in the early years of the People's Republic of China, when the country was building a modern electricity industry almost from first principles. Over the following decades the institute grew alongside the grid itself, and it is today a subsidiary research institute of the State Grid Corporation of China, the state-owned enterprise responsible for constructing and operating power grids across most of China. Its longevity matters to its role: an institute that has worked on Chinese power systems since 1951 holds institutional knowledge about generation, transmission and distribution that newer organisations cannot easily replicate.

Within the State Grid system, CEPRI has a coordinating function as well as a research function. SGCC's own description states that CEPRI has the task of coordinating the efforts of the provincial electric power research institutes under SGCC to build an integrated technical support system. Provincial institutes work on the problems of their own grids; CEPRI's job includes drawing that work together, setting common technical directions and providing the deep specialist capability that a single province would not maintain on its own.

A multidisciplinary research remit

The breadth of CEPRI's research is one of its defining features. Profiles of the institute published by the United States Pacific Northwest National Laboratory's Tethys Engineering programme and by SGCC describe activity across power generation, transmission and distribution, power supply and utilisation, electric project design, construction, commissioning, operation, monitoring and maintenance, and fields including renewable energy, new materials, energy conversion, and information and communication technology. In other words, CEPRI's remit follows electricity through its whole journey, from the power station to the end user, and covers both the heavy engineering of the grid and the digital systems that increasingly control it.

That breadth reflects the institute's founding purpose. CEPRI is not a university department pursuing knowledge for its own sake, nor a manufacturer developing products for sale; it is an applied research institute whose work is expected to solve practical problems for grid construction and operation, and to do so at a level of generality that benefits the whole State Grid system rather than a single project.

Testing, inspection and technical standards

Alongside research and development, CEPRI carries out testing and inspection work and formulates technical standards. Testing matters because grid equipment — transformers, switchgear, cables, turbines and control systems — must perform reliably for decades under demanding conditions, and independent testing is how a grid operator knows that equipment meets specification before it is installed. Standards matter for a related reason: a grid the size of China's can only function as one system if its components, procedures and interfaces follow common rules. By working on technical standards of fundamental significance to power grids, CEPRI helps to define those common rules for the State Grid system and, through national standard-setting, for the wider Chinese power industry.

The combination of the three functions — research, testing and standards — is deliberate. Research findings feed into test methods; test experience reveals where standards are weak; and standards, once set, define the problems that the next round of research must solve. Housing all three in one institute gives SGCC a single technical authority able to carry an idea from laboratory investigation through verification to codified practice.

Renewable energy research

Renewable energy has become one of CEPRI's most visible fields. The institute has established national facilities including the National Wind Power Integration Research and Development (Test) Center and the National Energy Solar Center, giving it a formal national role in the two variable renewable technologies that dominate China's new generating capacity. Work at this scale is about integration as much as generation: wind and solar output varies with the weather, and a grid built around controllable power stations needs new methods of forecasting, dispatch and control to absorb large amounts of variable generation without compromising reliability.

CEPRI's Renewable Energy Research Center illustrates how that capability was built. The center's own history, as published by the institute, traces its origins to a New Energy Power Generation Institute founded in 1994, through a New Energy Research Department, to a Renewable Energy Research Center formally founded in 2006. In March 2012, SGCC integrated the Renewable Energy Research Division of CEPRI with the Clean Energy Power Generation Research Division of the SGCC Electric Power Research Institute into a New Energy Research Department of CEPRI, and in April 2016 the Renewable Energy Research Center was founded in its present form. The center provides technical support for SGCC in renewable energy generation planning, management and operation, engaging in analysis and evaluation, prediction and meteorological application, dispatch and operation, testing and measurement, control equipment, and distributed generation of wind and photovoltaic power.

Wind power testing and international standing

CEPRI's wind work has an international dimension. The institute has presented itself as the only Asian member of the MEASNET group, the international network of wind measurement institutes whose members agree common procedures for measuring wind turbine performance and wind resources. Membership of such a network signals that CEPRI's test results are produced to methods recognised by peer institutes in Europe and elsewhere.

The institute's renewable energy department also works directly with foreign technical partners. CEPRI's Renewable Energy Department and GL Garrad Hassan, the renewables business of the GL Group, signed a memorandum of understanding on cooperation in wind turbine prototype measurements, wind turbine inspections and technical guideline development, building on cooperation that included a 2007 training course for CEPRI executives on power-quality measurements conducted as part of a Sino-German technical cooperation project. For an institute serving a grid absorbing wind power at world-leading scale, such exchanges connected Chinese practice with the measurement and inspection experience accumulated in Europe's earlier wind markets.

Solar research and the Nanjing facilities

Solar power forms the second pillar of CEPRI's national renewable facilities. The National Energy Solar Center — also described as the National Solar Power Generation Research and Development (Test) Center — is located at CEPRI's Nanjing campus and was established with the approval of the National Energy Administration. A national test centre for solar generation performs for photovoltaic technology the same function that wind test facilities perform for turbines: independent measurement of how equipment actually performs, so that developers, manufacturers and grid operators can rely on comparable, verified data rather than competing claims.

The Nanjing presence is also a reminder that, although CEPRI is headquartered in Beijing, its facilities are not confined to the capital. Specialist test centres are sited where the work requires them, and the institute operates as a network of laboratories and centres under one institutional roof.

Research on the wider power system

Beyond renewables, CEPRI's published research output spans the core concerns of a modern grid operator. Its researchers publish on power system operation and control, including work associated with the State Key Laboratory of Operation and Control of Renewable Energy Storage Systems hosted in the State Grid system, and the institute is a recognised affiliation in international research databases for studies ranging from microgrids and smart grid investment assessment to energy storage and grid integration. Chinese official and academic sources routinely treat CEPRI as a practice base and partner for university electrical engineering programmes, reflecting its position between academia and industry.

Microgrids illustrate the institute's forward-looking work: reviews of microgrid development in China co-authored from CEPRI describe a technology — local networks combining distributed generation, storage and information technology — that the institute has helped to analyse and demonstrate, including participation in demonstration projects abroad. Such work sits naturally with CEPRI's integration remit, since distributed resources challenge the traditional one-way design of distribution networks.

Why CEPRI matters

CEPRI's significance is structural. China's electricity system is the largest in the world, and its operator, State Grid, needs a research arm able to work at the same scale: testing equipment for the highest-voltage networks, writing the standards those networks follow, coordinating provincial research institutes, and solving the integration problems created by the world's fastest-growing wind and solar fleets. Founded in 1951 and still performing that role more than seven decades later, the China Electric Power Research Institute is the institution through which much of that technical work is organised — a research institute whose output is measured not only in papers and patents, but in the reliability of the grid that hundreds of millions of people use every day.