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HO, T
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1
ID:
150438
Merit-order effects of renewable energy and price divergence in California’s day-ahead and real-time electricity markets
/ Woo, C K; Moore, J ; Schneiderman, B ; Ho, T
Woo, C K
Journal Article
0 Rating(s) & 0 Review(s)
Summary/Abstract
We answer two policy questions: (1) what are the estimated merit-order effects of renewable energy in the California Independent System Operator’s (CAISO’s) day-ahead market (DAM) and real-time market (RTM)? and (2) what causes the hourly DAM and RTM prices to systematically diverge? The first question is timely and relevant because if the merit-order effect estimates are small, California’s renewable energy development is of limited help in cutting electricity consumers’ bills but also has a lesser adverse impact on the state’s investment incentive for natural-gas-fired generation. The second question is related to the efficient market hypothesis under which the hourly RTM and DAM prices tend to converge. Using a sample of about 21,000 hourly observations of CAISO market prices and their fundamental drivers during 12/12/2012–04/30/2015, we document statistically significant estimates (p-value≤0.01) for the DAM and RTM merit-order effects. This finding lends support to California’s adopted procurement process to provide sufficient investment incentives for natural-gas-fired generation. We document that the RTM-DAM price divergence partly depends on the CASIO’s day-ahead forecast errors for system loads and renewable energy. This finding suggests that improving the performance of the CAISO’s day-ahead forecasts can enhance trading efficiency in California’s DAM and RTM electricity markets.
Key Words
California
;
Renewable Energy
;
Electricity Prices
;
Day-ahead Market
;
Real-Time Market
;
Merit-Order Effects
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2
ID:
132612
Residential outage cost estimation: Hong Kong
/ Woo, C.K; Ho, T; Shiu, A; Cheng, Y.S, Horowitz, I, Wang, J
Woo, C.K
Journal Article
0 Rating(s) & 0 Review(s)
Publication
2014.
Summary/Abstract
Hong Kong has almost perfect electricity reliability, the result of substantial investments ultimately financed by electricity consumers who may be willing to accept lower reliability in exchange for lower bills. But consumers with high outage costs are likely to reject the reliability reduction. Our ordered-logit regression analysis of the responses by 1876 households to a telephone survey conducted in June 2013 indicates that Hong Kong residents exhibit a statistically-significant preference for their existing service reliability and rate. Moreover, the average residential cost estimate for a 1-h outage is US$45 (HK$350), topping the estimates reported in 10 of the 11 studies published in the last 10 years. The policy implication is that absent additional compelling evidence, Hong Kong should not reduce its service reliability.
Key Words
Hong Kong
;
Energy Policy
;
Electricity Reliability
;
Policy Implication
;
Cost Estimation
;
Cost Theory
;
Residential Outage
;
Contingent Valuation Survey
;
Reliability Reduction
;
Ultimately Financed
;
Economic Policy
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